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Mendeliome v0.9918 ACO2 Zornitza Stark edited their review of gene: ACO2: Added comment: At least 10 unrelated families reported. I am not convinced this gene causes two separate disorders, more likely a spectrum. OA has been reported as an isolated finding in one family, and a feature of a more complex and severe neurological presentation in the rest.; Changed publications: 22405087, 25351951, 30689204, 32519519, 25351951
Mendeliome v0.9917 DAZL Bryony Thompson gene: DAZL was added
gene: DAZL was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DAZL was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DAZL were set to 34794894; 33095795; 16884537; 9288969
Phenotypes for gene: DAZL were set to Primary ovarian insufficiency
Review for gene: DAZL was set to AMBER
Added comment: PMID: 33095795 - Single POI case with heterozygous stopgain (c.640C>T:p.Q214*).
PMID: 16884537 - 4 heterozygous unrelated early menopause/POI cases with heterozygous missense (all rare in gnomAD v2.1, except p.Asn10His which has 14 hets)
PMID: 9288969 - supporting knockout mouse model
Sources: Literature
Mendeliome v0.9899 POLR3H Bryony Thompson gene: POLR3H was added
gene: POLR3H was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: POLR3H was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: POLR3H were set to 34794894; 30830215
Phenotypes for gene: POLR3H were set to Primary ovarian insufficiency
Review for gene: POLR3H was set to AMBER
Added comment: A homozygous missense variant (p.Asp50Gly) was identified homozygous in 2 unrelated families. A mull mouse model was embryonic lethal, but a mouse model homozygous for the missense were viable and showed delayed pubertal development, characterised by late first oestrus or preputial separation.
Sources: Literature
Mendeliome v0.9896 ELAC2 Zornitza Stark Phenotypes for gene: ELAC2 were changed from to Combined oxidative phosphorylation deficiency 17, MIM#615440
Mendeliome v0.9893 ELAC2 Zornitza Stark reviewed gene: ELAC2: Rating: GREEN; Mode of pathogenicity: None; Publications: 23849775, 31045291; Phenotypes: Combined oxidative phosphorylation deficiency 17, MIM#615440; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9892 KHDRBS1 Bryony Thompson gene: KHDRBS1 was added
gene: KHDRBS1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KHDRBS1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KHDRBS1 were set to 34794894; 29808484; 28938739; 20881015
Phenotypes for gene: KHDRBS1 were set to Premature ovarian failure
Review for gene: KHDRBS1 was set to GREEN
Added comment: 4 cases in 3 unrelated families and a supporting mouse model
PMID: 28938739 - missense (c.460A > G, p.M154V) identified in a Chinese mother and daughter with POI, and another missense (c.263C > T, p.P88L) identified in an idiopathic POI case.
SCV001364312.1 - case with POI and missense (p.Pro421Leu) submitted by an Italian institute (ClinVar ID: 929733)
PMID: 29808484 - missense (p.Pro296Leu) identified in a POI case, which also has a heterozygous missense in FGFR2. There are 12 hets with Pro296Leu in gnomAD v2.1. This case is not included in the final case count.
PMID: 20881015 - supporting null mouse model. Female mice were subfertile.
Sources: Literature
Mendeliome v0.9807 KCNJ2 Zornitza Stark Phenotypes for gene: KCNJ2 were changed from to Andersen syndrome MIM#170390; Atrial fibrillation, familial, 9 MIM#613980; Short QT syndrome 3 MIM#609622
Mendeliome v0.9786 COX7B Zornitza Stark Mode of inheritance for gene: COX7B was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9785 COX7B Zornitza Stark reviewed gene: COX7B: Rating: GREEN; Mode of pathogenicity: None; Publications: 23122588; Phenotypes: Linear skin defects with multiple congenital anomalies 2, MIM#300887; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9779 MBTPS2 Daniel Flanagan reviewed gene: MBTPS2: Rating: GREEN; Mode of pathogenicity: None; Publications: 27380894, 19361614, 21426410; Phenotypes: Osteogenesis imperfecta, type XIX, (MIM301014), IFAP syndrome with or without BRESHECK syndrome (MIM#308205), Keratosis follicularis spinulosa decalvans, X-linked (MIM#308800), ?Olmsted syndrome, X-linked (MIM#300918); Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9779 KCNJ2 Ain Roesley reviewed gene: KCNJ2: Rating: GREEN; Mode of pathogenicity: Other; Publications: ; Phenotypes: Andersen syndrome MIM#170390, Atrial fibrillation, familial, 9 MIM#613980, Short QT syndrome 3 MIM#609622; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes
Mendeliome v0.9779 COG1 Zornitza Stark Phenotypes for gene: COG1 were changed from to Congenital disorder of glycosylation, type IIg, MIM# 611209
Mendeliome v0.9776 COG1 Zornitza Stark reviewed gene: COG1: Rating: GREEN; Mode of pathogenicity: None; Publications: 16537452, 19008299, 17904886, 11980916; Phenotypes: Congenital disorder of glycosylation, type IIg, MIM# 611209; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9776 NEBL Bryony Thompson Added comment: Comment on list classification: Limited gene-disease vailidity, Classification - 09/25/2020 by ClinGen Dilated Cardiomyopathy GCEP. Evidence Summary: NEBL was evaluated for autosomal dominant dilated cardiomyopathy (DCM). Human genetic evidence supporting this gene-disease relationship includes case-level data. Arimura and colleagues (2000, PMID: 11140941) analyzed 83 DCM patients and 311 healthy controls, identifying 4 missense variants of unknown significance (VUSs) in 4 DCM cases. High minor allele frequencies (MAFs) and lack of segregation excluded these variants as evidence. Purevjav and colleagues (2010, PMID: 20951326) investigated a total of 260 DCM patients and 300 unrelated ethnic matched controls by direct DNA sequencing. Authors identified 4 missense VUSs. One of these variants (Q128R) was downgraded in level of evidence due to the lack of segregation. The other 3 variants were not scored because of their MAF. Perrot and colleagues (2016, PMID: 27186169) investigated a total of 389 patients with DCM, HCM, or LVNC, 320 Caucasian sex-matched controls and 192 Caucasian sex-matched blood donors and identified 3 missense VUSs in 4 families. One of these variants was also carried by healthy relatives and therefore was excluded, however this may be explained by reduced penetrance. The 2 other variants lacked segregation as well and therefore were also excluded. In addition, this gene-disease association is supported by animal models. Mastronotaro and colleagues (2015, PMID: 25987543) created a NEBL knockout mice that exhibited normal cardiac function up to 9 months of age but after 2 weeks of transaortic constriction (TAC), these mice showed Z-line widening since the age of 5 months and upregulation of cardiac stress genes (basal and after TAC) However, absence of clinical DCM features in KO-NEBL mice as well as Western Blot analysis which contradicted previous findings by showing a similar protein expression between knockout and wild-type mice, excluding it as evidence. Purevjav and colleagues (2010, PMID: 20951326) generated a transgenic mouse overexpressing WT or mutant NEBL under the control of the α-MyHC promoter (4 variants were tested). Mice overexpressing p.K60N or p.Q128R variants died within 1 year because of severe heart enlargement and heart failure. Mice overexpressing p.G202R or p.A592E were born and developed normally but after 6 months displayed reduced stress tolerance, cardiac enlargement due to left ventricle dilation, myocyte disarray, and interstitial cell infiltration. In summary, there is limited evidence to support this gene-disease relationship. More evidence is needed to support the relationship of NEBL and autosomal dominant DCM. This classification was approved by the ClinGen Dilated Cardiomyopathy Working Group on October 11, 2019 (SOP Version 7). Gene Clinical Validity Standard Operating Procedures (SOP) - SOP7
Mendeliome v0.9774 SPATA5L1 Zornitza Stark changed review comment from: Note some of the affected individuals had isolated deafness, hence two OMIM phenotypes have been associated with this gene. All were of Ashkenazi Jewish origin, and had the p.Ile466Met founder variant, either hmz or compound het with another variant.; to: Note some of the affected individuals had isolated deafness, hence two OMIM phenotypes have been associated with this gene. All were of Ashkenazi Jewish origin, and had the p.Ile466Met founder variant, compound het with another variant.
Mendeliome v0.9774 SPATA5L1 Zornitza Stark edited their review of gene: SPATA5L1: Added comment: Note some of the affected individuals had isolated deafness, hence two OMIM phenotypes have been associated with this gene. All were of Ashkenazi Jewish origin, and had the p.Ile466Met founder variant, either hmz or compound het with another variant.; Changed publications: 34626583; Changed phenotypes: Neurodevelopmental disorder with hearing loss and spasticity, MIM# 619616, Deafness, autosomal recessive 119, MIM# 619615
Mendeliome v0.9774 MEIS2 Zornitza Stark Phenotypes for gene: MEIS2 were changed from to Cleft palate, cardiac defects, and mental retardation (MIM#600987)
Mendeliome v0.9771 LAMA4 Zornitza Stark Phenotypes for gene: LAMA4 were changed from to Cardiomyopathy, dilated, 1JJ (MIM#615235)
Mendeliome v0.9767 LAMA4 Zornitza Stark reviewed gene: LAMA4: Rating: RED; Mode of pathogenicity: None; Publications: 17646580, 26406308, 27532257; Phenotypes: Cardiomyopathy, dilated, 1JJ (MIM#615235); Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.9735 IFITM5 Ain Roesley edited their review of gene: IFITM5: Added comment: Comment on mode of pathogenicity: LoF not established, alternative neomorph/GoF postulated but not yet conclusively proven; Changed mode of pathogenicity: Other
Mendeliome v0.9727 CFTR Zornitza Stark Phenotypes for gene: CFTR were changed from to Cystic fibrosis, MIM# 219700; Congenital bilateral absence of vas deferens, MIM# 277180
Mendeliome v0.9725 CFTR Zornitza Stark reviewed gene: CFTR: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Cystic fibrosis, MIM# 219700, Congenital bilateral absence of vas deferens, MIM# 277180; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9714 HKDC1 Zornitza Stark gene: HKDC1 was added
gene: HKDC1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: HKDC1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: HKDC1 were set to 30085091
Phenotypes for gene: HKDC1 were set to Retinitis pigmentosa 92, MIM# 619614
Review for gene: HKDC1 was set to RED
Added comment: Two unrelated Chinese men reported with relatively late-onset RP, and same homozygous missense variant.
Sources: Expert Review
Mendeliome v0.9707 CDON Zornitza Stark changed review comment from: >5 unrelated families reported, however note some of the variants are present at a very low frequentcy in gnomad (1-4) and some are inherited. Mouse model.; to: >5 unrelated families reported, however note some of the variants are present at a very low frequentcy in gnomad (1-4) and some are inherited. Mouse model.

Note single report of bi-allelic variants in association with coloboma: PMID 32729136
Mendeliome v0.9702 MICAL1 Bryony Thompson gene: MICAL1 was added
gene: MICAL1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MICAL1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MICAL1 were set to 29394500; 21638339
Phenotypes for gene: MICAL1 were set to Autosomal dominant epilepsy with auditory features (ADEAF)
Review for gene: MICAL1 was set to AMBER
Added comment: Two families with supporting in vitro functional assays. Assessment of expression pattern of Mical-1 in the temporal neocortex of patients with intractable temporal epilepsy and pilocarpine-induced rat model, suggests Mical-1 may associate with inner pathophysiological modulation in epilepsy.
Sources: Expert list
Mendeliome v0.9701 CPA6 Bryony Thompson Added comment: Comment on list classification: ClinGen Epilepsy GCEP has reviewed both inheritances for gene-disease associations with epilepsy: AR disease is Disputed - There is contradictory case level and experimental data regarding any association between CPA6 and autosomal recessive epilepsy. Classification - 07/29/2021 AD disease is Refuted- There is very limited evidence supporting a gene-disease association. Many of the reported pathogenic variants have been subsequently identified as having a high minor allele frequency in population databases. Classification - 07/29/2021
Mendeliome v0.9691 BRAT1 Zornitza Stark changed review comment from: At least 4 individuals reported from unrelated families and bi-allelic variants in this gene.
Sources: Expert list; to: Biallelic mutations in the BRAT1 gene, encoding BRCA1-associated ATM activator 1, result in variable phenotypes, from rigidity and multifocal seizure syndrome, lethal neonatal (RMFSL) to neurodevelopmental disorder and cerebellar atrophy with or without seizures (NEDCAS), without obvious genotype-phenotype associations.

Multiple families reported with each.
Mendeliome v0.9682 BMPER Zornitza Stark commented on gene: BMPER: Perinatal lethal skeletal dysplasia.

The primary skeletal characteristics include small chest, abnormal vertebral segmentation, and posterior rib gaps containing incompletely differentiated mesenchymal tissue. Consistent craniofacial features include ocular hypertelorism, epicanthal folds, depressed nasal bridge with short nose, and low-set ears. The most commonly described extraskeletal finding is nephroblastomatosis with cystic kidneys, but other visceral findings have been described in some cases.

At least 5 unrelated families reported.
Mendeliome v0.9661 B3GAT3 Zornitza Stark changed review comment from: More than 5 unrelated families reported.; to: 26 patients from 13 families with variable phenotypes resembling Larsen, Antley-Bixler, Shprintzen-Goldberg, and Geroderma osteodysplastica syndromes. Multiple skeletal and cardiac abnormalities reported.
Mendeliome v0.9644 DDX3X Zornitza Stark Mode of inheritance for gene: DDX3X was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9643 DDX3X Zornitza Stark reviewed gene: DDX3X: Rating: GREEN; Mode of pathogenicity: None; Publications: 30266093, 26235985, 25533962, 33528536, 30936465, 31274575, 30817323; Phenotypes: Intellectual developmental disorder, X-linked, syndrome, Snijders Blok type MIM# 300958; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9636 C9orf3 Zornitza Stark gene: C9orf3 was added
gene: C9orf3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: C9orf3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: C9orf3 were set to 34596301
Phenotypes for gene: C9orf3 were set to Dystonia 31, MIM# 619565
Review for gene: C9orf3 was set to GREEN
Added comment: Dystonia-31 (DYT31) is an autosomal recessive progressive neurologic disorder characterized by involuntary muscle twisting movements and postural abnormalities affecting the upper and lower limbs, neck, face, and trunk. Some patients may have orofacial dyskinesia resulting in articulation and swallowing difficulties. The age at onset ranges from childhood to young adulthood. There are usually no additional neurologic symptoms, although late-onset parkinsonism was reported in 1 family.

5 individuals from 4 unrelated families reported.

HGNC approved name is AOPEP.
Sources: Literature
Mendeliome v0.9616 MYH10 Krithika Murali gene: MYH10 was added
gene: MYH10 was added to Mendeliome. Sources: Expert list,Literature
Mode of inheritance for gene: MYH10 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MYH10 were set to 24825879; 24901346; 25356899; 22495309; 25003005
Phenotypes for gene: MYH10 were set to Microcephaly; Intellectual Disability
Review for gene: MYH10 was set to GREEN
Added comment: De novo variants were identified in 5 unrelated individuals with moderate-severe ID and developmental delay.

Other reported phenotypic features include microcephaly (4/5), IUGR/failure to thrive (4/5), cerebral atrophy (3/5), hydrocephalus (2/5), congenital bilateral hip dysplasia (2/5), cerebellar atrophy (1/5), congenital diaphragmatic hernia (1/5), cranial nerve palsy (1/5), nystagmus (1/5), dysplastic kidney (1/5).

Defects in heart development, body wall closure and other birth defects noted in mouse models.
Sources: Expert list, Literature
Mendeliome v0.9607 COG6 Zornitza Stark changed review comment from: More than 5 unrelated families reported. Key features include growth retardation, developmental delay, microcephaly, liver and gastrointestinal disease, joint contractures and episodic fever. Ectodermal signs such as hypohidrosis/hyperthermia, hyperkeratosis and tooth anomalies are prominent. Note Shaheen syndrome, MIM#615328 is an allelic disorder, with overlapping clinical features, but normal transferring isoforms recorded creating confusion about whether it represents a distinct entity.; to: More than 5 unrelated families reported. Key features include growth retardation, developmental delay, microcephaly, liver and gastrointestinal disease, joint contractures and episodic fever. Ectodermal signs such as hypohidrosis/hyperthermia, hyperkeratosis and tooth anomalies are prominent. Note Shaheen syndrome, MIM#615328 is an allelic disorder, with overlapping clinical features, but normal transferrin isoforms recorded creating confusion about whether it represents a distinct entity.
Mendeliome v0.9594 AMER1 Zornitza Stark Mode of inheritance for gene: AMER1 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9593 AMER1 Zornitza Stark reviewed gene: AMER1: Rating: GREEN; Mode of pathogenicity: None; Publications: 20209645, 19079258; Phenotypes: Osteopathia striata with cranial sclerosis, MIM# 300373; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9593 ALG1 Zornitza Stark Phenotypes for gene: ALG1 were changed from to Congenital disorder of glycosylation, type Ik, MIM# 608540
Mendeliome v0.9590 ALG1 Zornitza Stark reviewed gene: ALG1: Rating: GREEN; Mode of pathogenicity: None; Publications: 26931382; Phenotypes: Congenital disorder of glycosylation, type Ik, MIM# 608540; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9581 SIM1 Zornitza Stark edited their review of gene: SIM1: Added comment: At least 20 probands with reduced penetrance reported.

PMID:33434169;
1x missense inherited from normal mother

PMID:30926952;
2x unrelated - 1 missense 1 splice. Family history noted

PMID:23778136;
4 children with clinical features of PWL syndrome, including severe obesity - all missense
1x inherited from normal father

PMID:23778139;
at least 13 families with segregation and reduced penetrance evidence - all missense
In vitro luciferase done to show LoF

NOTE:
Individuals with Prader-Willi-like phenotype may have 6q16.2del instead, which encompasses SIM1; Changed rating: GREEN; Changed publications: 33434169, 30926952, 23778136, 23778139; Changed phenotypes: congenital obesity, Prader-Willi-like syndrome; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.9579 MLIP Zornitza Stark Phenotypes for gene: MLIP were changed from 34581780 to MLIP-related myopathy with rhabdomyolysis
Mendeliome v0.9575 MLIP Michelle Torres edited their review of gene: MLIP: Changed publications: 34581780; Changed phenotypes: MLIP-related myopathy with rhabdomyolysis
Mendeliome v0.9570 STT3A Zornitza Stark Phenotypes for gene: STT3A were changed from to Congenital disorder of glycosylation, type Iw MIM#615596
Mendeliome v0.9569 KIAA0391 Lucy Spencer changed review comment from: Four unrelated families with multisystem disease associated with bi-allelic variants in PRORP. Affected individuals presented with variable phenotypes comprising sensorineural hearing loss, primary ovarian insufficiency, developmental delay, and brain white matter changes.

-1 consanguineous family with homozygous missense in 3 affected sisters, het parents unaffected. Siblings had profound bilateral SNHL in infancy. In teens developed primary amenorrhea/Perrault syndrome, and hypergonadotropic hypogonadism.
-1 unrelated male with compound het missense, each inherited from an unaffected parent. Hearing loss noted at 3, diagnosed at 5.
-1 unrelated male compound het for a missense and a frameshift. appendicular hypertonia in infancy, mild dysmorphism. Severe global dev delay at 20 months. Normal hearing at 18 months, but at 3 years had bilateral SNHL.
-an affected mother and her 2 affected children (son and daughter), homozygous for a missense. Father is heterozygous and unaffected. Son has psychotic disorder, autistic traits. Sister had intrauterine growth retardation, global developmental delay, and seizures in the first years of life. Mother presented with retrobulbar optic neuritis and tonic pupil at 39 years of age, then with asthenia, myalgias, memory loss, and frequent headaches.

All variants are in p.400s.
Sources: Literature; to: Four unrelated families with multisystem disease associated with bi-allelic variants in PRORP. Affected individuals presented with variable phenotypes comprising sensorineural hearing loss, primary ovarian insufficiency, developmental delay, and brain white matter changes.

-1 consanguineous family with homozygous missense in 3 affected sisters, het parents unaffected. Siblings had profound bilateral SNHL in infancy. In teens developed primary amenorrhea/Perrault syndrome, and hypergonadotropic hypogonadism.
-1 unrelated male with compound het missense, each inherited from an unaffected parent. Hearing loss noted at 3, diagnosed at 5.
-1 unrelated male compound het for a missense and a frameshift. appendicular hypertonia in infancy, mild dysmorphism. Severe global dev delay at 20 months. Normal hearing at 18 months, but at 3 years had bilateral SNHL.
-an affected mother and her 2 affected children (son and daughter), homozygous for a missense. Father is heterozygous and unaffected. Son has psychotic disorder, autistic traits. Sister had intrauterine growth retardation, global developmental delay, and seizures in the first years of life. Mother presented with retrobulbar optic neuritis and tonic pupil at 39 years of age, then with asthenia, myalgias, memory loss, and frequent headaches.

All variants are in p.400s.
Sources: Literature
Mendeliome v0.9567 KIAA0391 Lucy Spencer gene: KIAA0391 was added
gene: KIAA0391 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KIAA0391 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: KIAA0391 were set to PMID: 34715011
Added comment: Four unrelated families with multisystem disease associated with bi-allelic variants in PRORP. Affected individuals presented with variable phenotypes comprising sensorineural hearing loss, primary ovarian insufficiency, developmental delay, and brain white matter changes.

-1 consanguineous family with homozygous missense in 3 affected sisters, het parents unaffected. Siblings had profound bilateral SNHL in infancy. In teens developed primary amenorrhea/Perrault syndrome, and hypergonadotropic hypogonadism.
-1 unrelated male with compound het missense, each inherited from an unaffected parent. Hearing loss noted at 3, diagnosed at 5.
-1 unrelated male compound het for a missense and a frameshift. appendicular hypertonia in infancy, mild dysmorphism. Severe global dev delay at 20 months. Normal hearing at 18 months, but at 3 years had bilateral SNHL.
-an affected mother and her 2 affected children (son and daughter), homozygous for a missense. Father is heterozygous and unaffected. Son has psychotic disorder, autistic traits. Sister had intrauterine growth retardation, global developmental delay, and seizures in the first years of life. Mother presented with retrobulbar optic neuritis and tonic pupil at 39 years of age, then with asthenia, myalgias, memory loss, and frequent headaches.

All variants are in p.400s.
Sources: Literature
Mendeliome v0.9565 STT3A Elena Savva reviewed gene: STT3A: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 34653363, 23842455, 30701557, 28424003; Phenotypes: Congenital disorder of glycosylation, type Iw MIM#615596; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.9564 SPATA5L1 Paul De Fazio gene: SPATA5L1 was added
gene: SPATA5L1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SPATA5L1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SPATA5L1 were set to 34626583
Phenotypes for gene: SPATA5L1 were set to Intellectual disability; spastic-dystonic cerebral palsy; epilepsy; hearing loss
Review for gene: SPATA5L1 was set to GREEN
gene: SPATA5L1 was marked as current diagnostic
Added comment: 47 individuals from 26 unrelated families from various ethnicities with biallelic variants reported. Phenotypes include ID, hearing impairment, movement disorder, abnormal MRI, hypotonia, visual impairment, epilepsy, and microcephaly.
Sources: Literature
Mendeliome v0.9539 COL3A1 Krithika Murali gene: COL3A1 was added
gene: COL3A1 was added to Mendeliome. Sources: Expert list,Literature
Mode of inheritance for gene: COL3A1 was set to Other
Phenotypes for gene: COL3A1 were set to Ehlers-Danlos syndrome, vascular type - MIM#130050; Polymicrogyria with or without vascular-type EDS - #618343
Review for gene: COL3A1 was set to GREEN
Added comment: ClinGen validated gene-disease relationship with autosomal dominant vascular EDS

Also well-established phenotype with polymicrogyria with biallelic variants in COL3A1


AD - Ehlers Danlos vascular type
AR - Polymicrogyria with or without vascular type EDS
Sources: Expert list, Literature
Mendeliome v0.9538 CDH1 Krithika Murali gene: CDH1 was added
gene: CDH1 was added to Mendeliome. Sources: Expert list,Literature
Mode of inheritance for gene: CDH1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes for gene: CDH1 were set to Blepharocheilodontic syndrome 1- MIM#119580; Cleft lip and palate
Review for gene: CDH1 was set to GREEN
Added comment: Well-established gene-disease association with blepharocheilodontic syndrome (BDC) and orofacial clefting.

Gene also associated with cancer predisposition - diffuse gastric cancer (juvenile onset reported) and lobular breast cancer.
Sources: Expert list, Literature
Mendeliome v0.9537 BGN Krithika Murali gene: BGN was added
gene: BGN was added to Mendeliome. Sources: Expert list,Literature
Mode of inheritance for gene: BGN was set to Other
Publications for gene: BGN were set to 27236923; 27632686
Phenotypes for gene: BGN were set to Meester-Loeys syndrome - #300989; Spondyloepimetaphyseal dysplasia, X-linked - #300106
Review for gene: BGN was set to GREEN
Added comment: Well-established gene-disease associated with X-linked spondyloepimetaphyseal dysplasia (SEMD) and Meester-Loeys syndrome (connective tissue disorder with phenotypic features including aortic dissection, aortic aneurysym, dysmorphism, joint hypermobility and mild skeletal dysplasia - with juvenile-onset reported in males)

SEMD - X-linked recessive inheritance
Meester-Loeys syndrome - hemizygous males, monoallelic mutations may cause disease in females (may be less severe, later onset than males)
Sources: Expert list, Literature
Mendeliome v0.9537 ACTC1 Krithika Murali gene: ACTC1 was added
gene: ACTC1 was added to Mendeliome. Sources: Expert list,Literature
Mode of inheritance for gene: ACTC1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ACTC1 were set to 26061005; 17947298; 31430208; 18403758; 30384889
Phenotypes for gene: ACTC1 were set to Atrial septal defect 5, MIM# 612794; Cardiomyopathy, dilated, 1R - MIM# 613424; Cardiomyopathy, hypertrophic, 11 - #612098
Review for gene: ACTC1 was set to GREEN
Added comment: Four families reported with congenital heart disease and variants in this gene. Note gene is also associated with cardiomyopathies, including paediatric-onset dilated and hypertrophic cardiomyopathy.
Sources: Expert list, Literature
Mendeliome v0.9532 AHDC1 Zornitza Stark Phenotypes for gene: AHDC1 were changed from to Xia-Gibbs syndrome, MIM# 615829; AHDC1-related intellectual disability, obstructive sleep apnoea, mild dysmorphism syndrome MONDO:0014358
Mendeliome v0.9529 AHDC1 Zornitza Stark reviewed gene: AHDC1: Rating: GREEN; Mode of pathogenicity: None; Publications: 24791903, 27148574, 30152016; Phenotypes: Xia-Gibbs syndrome, MIM# 615829, AHDC1-related intellectual disability, obstructive sleep apnoea, mild dysmorphism syndrome MONDO:0014358; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.9504 MANBA Zornitza Stark changed review comment from: Two mono-allelic variants reported in association with isolated nystagmus. Note bi-allelic variants cause a lysosomal storage disorder.; to: Two mono-allelic variants reported in association with isolated nystagmus.
Mendeliome v0.9504 MANBA Zornitza Stark edited their review of gene: MANBA: Added comment: Two mono-allelic variants reported in association with isolated nystagmus. Note bi-allelic variants cause a lysosomal storage disorder.; Changed publications: 30552791, 25741867; Changed phenotypes: Mannosidosis, beta, MIM# 248510, MONDO:0009562, Nystagmus, autosomal dominant; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.9467 ACTC1 Krithika Murali gene: ACTC1 was added
gene: ACTC1 was added to Mendeliome. Sources: Literature,Expert list
Mode of inheritance for gene: ACTC1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ACTC1 were set to 17947298; 31430208
Phenotypes for gene: ACTC1 were set to Atrial septal defect 5 - MIM# 612794; Cardiomyopathy, dilated, 1R - MIM# 613424; Cardiomyopathy, hypertrophic, 11 - #612098; Left ventricular noncompaction 4 - #613424
Review for gene: ACTC1 was set to GREEN
Added comment: Three families reported with congenital heart disease and variants in this gene. Gene is also associated with cardiomyopathies, including paediatric onset.
Sources: Literature, Expert list
Mendeliome v0.9437 IFT74 Zornitza Stark edited their review of gene: IFT74: Added comment: Limited evidence for association with spermatogenic failure: two unrelated individuals with same homozygous missense variant.; Changed publications: 27486776, 32144365, 33531668, 33689014; Changed phenotypes: Bardet-Biedl syndrome 20, MIM# 617119, Joubert syndrome, Spermatogenic failure 58, MIM# 619585
Mendeliome v0.9418 TAOK1 Zornitza Stark Phenotypes for gene: TAOK1 were changed from TAOK1-related neurodevelopmental disorder to Developmental delay with or without intellectual impairment or behavioural abnormalities, MIM#619575; TAOK1-related neurodevelopmental disorder
Mendeliome v0.9417 TAOK1 Zornitza Stark edited their review of gene: TAOK1: Changed phenotypes: Developmental delay with or without intellectual impairment or behavioural abnormalities, MIM#619575, TAOK1-related neurodevelopmental disorder
Mendeliome v0.9409 ADGRG1 Zornitza Stark Phenotypes for gene: ADGRG1 were changed from to Polymicrogyria, bilateral frontoparietal, MIM#606854
Mendeliome v0.9406 ADGRG1 Zornitza Stark reviewed gene: ADGRG1: Rating: GREEN; Mode of pathogenicity: None; Publications: 16240336, 33299078; Phenotypes: Polymicrogyria, bilateral frontoparietal, MIM#606854; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9402 TBK1 Zornitza Stark Phenotypes for gene: TBK1 were changed from to Frontotemporal dementia and/or amyotrophic lateral sclerosis 4, MIM# 616439
Mendeliome v0.9392 KCNC2 Daniel Flanagan gene: KCNC2 was added
gene: KCNC2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: KCNC2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KCNC2 were set to PMID:32392612; 31972370
Phenotypes for gene: KCNC2 were set to epileptic encephalopathy; spastic tetraplegia; opisthotonos attacks; intellectual disability; West syndrome
Review for gene: KCNC2 was set to AMBER
Added comment: PMID: 31972370. De novo missense variant (p.Val471Leu) identified in a child with early severe developmental and epileptic encephalopathy, spastic tetraplegia, opisthotonos attacks.

PMID: 32392612. De novo missense variant (p.Asp167Tyr) identified in a neurofibromatosis type 1 related West syndrome patient. Functional analysis showed a significant reduction of the mean potassium current and a shift in the voltage dependence of steady-state activation. Maternally inherited NF1 variant (p.T1951Nfs*5) also identified, the mother was "clinically unremarkable".
Sources: Expert list
Mendeliome v0.9392 OSTC Belinda Chong gene: OSTC was added
gene: OSTC was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: OSTC was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: OSTC were set to PMID: 32267060
Phenotypes for gene: OSTC were set to Oligosaccharyltransferase complex-congenital disorders of glycosylation
Review for gene: OSTC was set to RED
Added comment: A patient with microcephaly, dysmorphic facies, congenital heart defect, focal epilepsy, infantile spasms, skeletal dysplasia, and a type 1 serum transferrin isoelectrofocusing due to a novel CDG caused by a homozygous variant in the oligosaccharyltransferase complex noncatalytic subunit (OSTC) gene involved in glycosylation and confirmed by serum transferrin electrophoresis.
Patient was homozygous for a canonical splice variant (c.431 + 1G > A), mRNA from patient's fibroblast showed mRNA transcript reduced 80-90%/aberrant splicing - predicting NMD.
GnomAD - 10 hets, 0 hom
Sources: Literature
Sources: Literature
Mendeliome v0.9392 TBK1 Lucy Spencer reviewed gene: TBK1: Rating: ; Mode of pathogenicity: None; Publications: PMID: 31000212, 25943890; Phenotypes: Frontotemporal dementia, amyotrophic lateral sclerosis; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.9384 L3MBTL1 Zornitza Stark gene: L3MBTL1 was added
gene: L3MBTL1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: L3MBTL1 was set to MONOALLELIC, autosomal or pseudoautosomal, maternally imprinted (paternal allele expressed)
Publications for gene: L3MBTL1 were set to 23543057; 15123827; 30794780
Phenotypes for gene: L3MBTL1 were set to Affected tissue: myeloid lineages; Phenotype resulting from under expression: lymphoid malignancy
Review for gene: L3MBTL1 was set to RED
Added comment: Germline variation in this imprinted gene is not currently associated with disease.

Somatic deletions of 20q are associated with chronic myeloid malignancies. Aziz et al showed that a single heterozygous 20q deletion consistently resulted in the complete loss of expression of the imprinted genes L3MBTL1 and SGK2, indicative of a pathogenetic role for loss of the active paternally inherited locus. Concomitant loss of both L3MBTL1 and SGK2 dysregulated erythropoiesis and megakaryopoiesis.
Sources: Expert Review
Mendeliome v0.9383 KCNQ1OT1 Zornitza Stark gene: KCNQ1OT1 was added
gene: KCNQ1OT1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: KCNQ1OT1 was set to MONOALLELIC, autosomal or pseudoautosomal, maternally imprinted (paternal allele expressed)
Publications for gene: KCNQ1OT1 were set to 22205991; 15372379; 23511928; 30794780; 29377879; 10220444; 32447323; 33177595; 29047350
Phenotypes for gene: KCNQ1OT1 were set to Beckwith-Wiedemann syndrome OMIM:130650; Russell-Silver Syndrome
Review for gene: KCNQ1OT1 was set to AMBER
Added comment: Limited evidence that isolated intragenic variation in KCNQ1OT1 is definitively associated with a phenotype.

KCNQ1OT1 encodes the regulatory antisense non-coding RNA KCNQ1OT1 (KCNQ1 overlapping) and is located within the KCNQ1OT1:TSS DMR (imprinting control region 2; IC2) at 11p15.5. IC2 is located within KCNQ1 intron 10. KCNQ1OT1 is maternally imprinted and paternally expressed. On the paternal chromosome, KCNQ1OT1 is transcribed and represses in cis the flanking imprinted genes, including the growth inhibitor CDKN1C, which is normally transcribed from the maternal allele. In 50% of the BWS patients, loss of methylation (LOM) of IC2 leads to biallelic expression of KCNQ1OT1 and biallelic silencing of CDKN1C (PMID 30635621). Expression is increased in BWS due to IC2 epimutations or paternal UPD.

Single nucleotide variants within KCNQ1OT1 have not been definitively associated with human disease. A heterozygous maternally inherited non-coding variant was identified in an individual with isolated omphalocele. This variant was shown to alter the methylation pattern of the imprinted allele (PMID 29047350).

Eggerman et al (PMID 32447323) described a 132 base pair deletion within KCNQ1OT1 associated with growth retardation in the case of paternal but not maternal transmission. This intragenic deletion did not affect IC2 methylation.

Microdeletions of IC2 involving KCNQ1OT1 on the paternal allele have been identified in a small number of patients with Russell-Silver syndrome. Similarly, microdeletions of IC2 involving KCNQ1OT1 on the maternal allele have been identified in a small number of patients with BWS. These deletions also variably involve KCNQ1 or CDKN1C. LoF in CDKN1C is a known cause of BWS. There is some evidence to suggest that disruption of KCNQ1 prevents maternal methylation at IC2 (PMID 30778172).
Sources: Expert Review
Mendeliome v0.9382 H19 Zornitza Stark gene: H19 was added
gene: H19 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: H19 was set to MONOALLELIC, autosomal or pseudoautosomal, paternally imprinted (maternal allele expressed)
Publications for gene: H19 were set to 20007505; 15743916; 23118352; 21863054; 21571108; 18245780; 24916376; 25943194
Phenotypes for gene: H19 were set to Phenotypes resulting from gene over expression: Silver-Russell Syndrome (proven effects of dosage alteration rather than gene muation); Affected tissue: all; Phenotype resulting from under expression: Beckwith-Wiedemann Syndrome
Review for gene: H19 was set to RED
Added comment: Methylation changes rather than sequence variation are associated with BWS/RSS.
Sources: Expert Review
Mendeliome v0.9379 OOEP Zornitza Stark gene: OOEP was added
gene: OOEP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: OOEP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: OOEP were set to 29574422
Phenotypes for gene: OOEP were set to Multi locus imprinting disturbance in offspring
Review for gene: OOEP was set to RED
Added comment: Single report of biallelic variants in this gene in a mother of a child with Multi locus imprinting disturbance (MLID) and a transient neonatal diabetes mellitus phenotype.

This gene encodes part of the subcortical maternal complex (SCMC). Other genes in this group act as 'maternal effect' genes and are associated with early embryonic arrest, recurrent hydatiform mole and MLID in offspring.

As is the case for other genes encoding components of the SCMC, the pathogenicity of variants can be difficult to establish as reproductive outcomes are not recorded in genomic databases and variants may be listed in population databases as they are not classed as pathogenic in males or women with no reproductive history.

Functional studies of genes encoding components of the SCMC are limited as their expression is restricted to the oocyte and early embryo.
Sources: Literature
Mendeliome v0.9378 ZNF445 Zornitza Stark gene: ZNF445 was added
gene: ZNF445 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZNF445 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZNF445 were set to 34039421; 30602440; 30846001
Phenotypes for gene: ZNF445 were set to Temple syndrome; Multi locus imprinting disturbance (MLID)
Review for gene: ZNF445 was set to RED
Added comment: Single report (Kagami 2021) of a child with Temple syndrome and MLID found to have a novel homozygous truncating variant in ZNF445.

ZNF445 has been shown to play a critical role in the maintenance of postfertilisation methylation imprints (Takahashi 2019). Mechanism and parent of origin effects remain uncertain.
Sources: Literature
Mendeliome v0.9376 NSRP1 Zornitza Stark gene: NSRP1 was added
gene: NSRP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NSRP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NSRP1 were set to 34385670
Phenotypes for gene: NSRP1 were set to Epilepsy; Cerebral palsy; microcephaly; Intellectual disability
Review for gene: NSRP1 was set to GREEN
Added comment: Novel gene regulating splicing. Biallelic LoF pathogenic variants reported in 6 individuals from 3 unrelated families associated with a phenotype characterized by developmental delay, epilepsy, microcephaly, and spastic cerebral palsy.
Sources: Literature
Mendeliome v0.9370 GABRD Zornitza Stark edited their review of gene: GABRD: Added comment: 10 individuals with 7 unique variants reported in individuals with neurodevelopmental disorders and epilepsy. Six of the variants were demonstrated to be GoF, and those individuals with neurodevelopmental disorders with behavioural issues, various degrees of intellectual disability, generalized epilepsy with atypical absences and generalized myoclonic and/or bilateral tonic-clonic seizures. In contrast, the one individual carrying a loss-of-function variant had normal intelligence, no seizure history but has a diagnosis of autism spectrum disorder and suffering from elevated internalizing psychiatric symptoms.; Changed rating: GREEN; Changed publications: 15115768, 34633442; Changed phenotypes: Intellectual disability, Epilepsy, Susceptibility to epilepsy, MIM#613060
Mendeliome v0.9366 NLRP5 Zornitza Stark edited their review of gene: NLRP5: Added comment: 'Maternal effect gene'
Part of the subcortical maternal complex

Report of five mothers carrying either monoallelic or biallelic variants in NLRP5, who had both unaffected offspring and offspring with BWS-MLID (Doherty 2015). Report of one family where the mother carried biallelic variants in NLRP5, had one offspring with BWS, one unaffected offspring and multiple miscarriages (Sparago 2019).

Reports of at least three unrelated individuals with recurrent early embryonic arrest carrying biallelic variants in NLRP5. Functional work suggesting protein degradation in affected human cell lines (Mu 2019, Xu 2020).; Changed rating: GREEN; Changed publications: 32222962, 31829238, 30877238, 26323243, 34440388; Changed phenotypes: Early embryonic arrest, Multi locus imprinting disturbance in offspring; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.9365 DSTYK Zornitza Stark changed review comment from: Mono-allelic variants and CAKUT: Multiple families reported, zebrafish model has multiple congenital anomalies including of the GU tract. Established gene-disease association.

Bi-allelic variants and HSP: Three families reported, but all had same intragenic deletion/insertion, suggestive of founder effect.; to: Mono-allelic variants and CAKUT: Multiple families reported, zebrafish model has multiple congenital anomalies including of the GU tract. Disputed gene-disease association as original variants present at relatively high pop frequency as per review by Ain Roesley.

Bi-allelic variants and HSP: Three families reported, but all had same intragenic deletion/insertion, suggestive of founder effect.
Mendeliome v0.9355 TARS2 Krithika Murali reviewed gene: TARS2: Rating: GREEN; Mode of pathogenicity: None; Publications: 33153448, 24827421, 34508595; Phenotypes: Combined oxidative phosphorylation deficiency 21 - 615918, Epilepsy; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9355 USP48 Zornitza Stark Added comment: Comment when marking as ready: Borderline Green: one of the variants is present at a high frequency in the normal population. However, even if just two families are considered, supportive functional data including zebrafish model.
Mendeliome v0.9351 MARS Zornitza Stark changed review comment from: Association with CMT: Two families reported. One mutation positive family member was asymptomatic. Second case is proband only testing with no segregation or functional data. Note one of the variants identified in dominant MARS1-associated neuropathy, p.Arg618Cys, has also been reported in AR MARS1-related pulmonary interstiatial/liver disease.; to: Association with CMT and mono-allelic variants: Two families reported. One mutation positive family member was asymptomatic. Second case is proband only testing with no segregation or functional data. Note one of the variants identified in dominant MARS1-associated neuropathy, p.Arg618Cys, has also been reported in AR MARS1-related pulmonary interstiatial/liver disease.
Mendeliome v0.9351 MARS Zornitza Stark changed review comment from: Association with interstitial lung and liver disease: More than 5 unrelated families reported. Founder variants in Reunion Island, p.Ser567Leu and p.Ala393Thr, in cis.

Pathologic examination of lung lavage is consistent with pulmonary alveolar proteinosis.; to: Association with interstitial lung and liver disease and bi-allelic variants: More than 5 unrelated families reported. Founder variants in Reunion Island, p.Ser567Leu and p.Ala393Thr, in cis.

Pathologic examination of lung lavage is consistent with pulmonary alveolar proteinosis.
Mendeliome v0.9351 MARS Zornitza Stark changed review comment from: Two families reported. One mutation positive family member was asymptomatic. Second case is proband only testing with no segregation or functional data. Note one of the variants identified in dominant MARS1-associated neuropathy, p.Arg618Cys, has also been reported in AR MARS1-related pulmonary interstiatial/liver disease.; to: Association with CMT: Two families reported. One mutation positive family member was asymptomatic. Second case is proband only testing with no segregation or functional data. Note one of the variants identified in dominant MARS1-associated neuropathy, p.Arg618Cys, has also been reported in AR MARS1-related pulmonary interstiatial/liver disease.
Mendeliome v0.9351 MARS Zornitza Stark edited their review of gene: MARS: Added comment: Association with interstitial lung and liver disease: More than 5 unrelated families reported. Founder variants in Reunion Island, p.Ser567Leu and p.Ala393Thr, in cis.

Pathologic examination of lung lavage is consistent with pulmonary alveolar proteinosis.; Changed rating: GREEN; Changed publications: 23729695, 24354524, 29655802, 24103465, 25913036; Changed phenotypes: Interstitial lung and liver disease, MIM#615486, Charcot-Marie-Tooth disease, axonal, type 2U, MIM# 616280; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.9347 AARS Eleanor Williams changed review comment from: PMID: 33909043 - Botta et al 2021 - using WES or WGS analysis of 34 unsolved cases with multi-system phenotypes, but with hair alterations that are typical of trichothiodystrophy but no reported photosensitivity, they identified 2 unrelated cases carrying 4 potentially pathogenic variants in the AARS1 gene (previously known as AARSB. Both patients had very rare compound heterozygous missense variants. In one family there was an older affected sibling but segregation data was not available for either family.; to: PMID: 33909043 - Botta et al 2021 - using WES or WGS analysis of 34 unsolved cases with multi-system phenotypes, but with hair alterations that are typical of trichothiodystrophy but no reported photosensitivity, they identified 2 unrelated cases carrying 4 potentially pathogenic variants in the AARS1 gene (previously known as AARSB. Both patients had very rare compound heterozygous missense variants. In one family there was an older affected sibling but segregation data was not available for either family. Functional studies suggest that the variants affects gene product stability.
Mendeliome v0.9328 UNC13B Zornitza Stark gene: UNC13B was added
gene: UNC13B was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: UNC13B was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: UNC13B were set to 33876820
Phenotypes for gene: UNC13B were set to Epilepsy
Review for gene: UNC13B was set to RED
Added comment: No OMIM human disease association. Gene encodes a presynaptic protein Munc13-2 highly expressed in the brain (predominantly cerebral cortex).

Variant interpretation data in human epilepsy cohort somewhat conflicting and restricted to a single study. Conflicting data esp regarding MOI, and evidence for pathogenicity of several of the variants is limited.

Wang et al, Brain, 2021 - trio-based whole-exome sequencing identified UNC13B in 12 individuals affected by partial epilepsy and/or febrile seizures from 8 unrelated families. Identified:
x1 de novo nonsense variant, absent in gnomad, damaging in silicos
x1 de novo splice site, absent in gnomad, damaging in silicos
x1 splice site variant present in unaffected mother (low frequency in gnomad)
x2 compound het in one individual - more severe phenotype postulated (x1 variant present in contro cohortl, the other variant present in low frequency in gnomad)
x1 missense variant - in Han Chinese major depressive disorders study, not in gnomad
x1 missense variant - highly conserved residue, not in gnomad
x2 other missense variant - highly conserved residue, low frequency in gnomad
Latter 4 missense variants cosegregated with affected individuals in the families

In Drosophila, seizure rate and duration were increased by Unc13b knockdown compared to wild-type flies, but these effects were less pronounced than in sodium voltage-gated channel alpha subunit 1 (Scn1a) knockdown Drosophila

De novo UNC13B variants previously reported in bipolar disorder and autism spectrum disorder
Sources: Expert Review
Mendeliome v0.9327 VARS2 Zornitza Stark Phenotypes for gene: VARS2 were changed from to Combined oxidative phosphorylation deficiency 20; OMIM #615917
Mendeliome v0.9324 VARS2 Zornitza Stark reviewed gene: VARS2: Rating: GREEN; Mode of pathogenicity: None; Publications: 24827421, 25058219, 29137650, 29314548, 31064326, 31623496; Phenotypes: Combined oxidative phosphorylation deficiency 20, OMIM #615917; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9312 ERBB4 Zornitza Stark Phenotypes for gene: ERBB4 were changed from to Amyotrophic lateral sclerosis 19, MIM# MIM#615515; Intellectual disability
Mendeliome v0.9309 ERBB4 Zornitza Stark reviewed gene: ERBB4: Rating: GREEN; Mode of pathogenicity: None; Publications: 24119685, 28889094, 33603162; Phenotypes: Amyotrophic lateral sclerosis 19, MIM# MIM#615515, Intellectual disability; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.9297 WLS Teresa Zhao changed review comment from: - We identified homozygous mutations in 10 affected persons from 5 unrelated families.
- Patients had multiorgan defects, including microcephal, facial dysmorphism, foot syndactyly, renal agenesis, alopecia, iris coloboma, and heart defects.
- The mutations affected WLS protein stability and Wnt signaling. Knock-in mice showed tissue and cell vulnerability consistent with Wnt-signaling intensity and individual and collective functions of Wnts in embryogenesis.
Sources: Literature; to: - Homozygous mutations in 10 affected persons from 5 unrelated families.
- Patients had multiorgan defects, including microcephal, facial dysmorphism, foot syndactyly, renal agenesis, alopecia, iris coloboma, and heart defects.
- The mutations affected WLS protein stability and Wnt signaling. Knock-in mice showed tissue and cell vulnerability consistent with Wnt-signaling intensity and individual and collective functions of Wnts in embryogenesis.
Sources: Literature
Mendeliome v0.9297 WLS Teresa Zhao gene: WLS was added
gene: WLS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: WLS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: WLS were set to PMID: 34587386
Phenotypes for gene: WLS were set to Syndromic structural birth defects
Review for gene: WLS was set to GREEN
Added comment: - We identified homozygous mutations in 10 affected persons from 5 unrelated families.
- Patients had multiorgan defects, including microcephal, facial dysmorphism, foot syndactyly, renal agenesis, alopecia, iris coloboma, and heart defects.
- The mutations affected WLS protein stability and Wnt signaling. Knock-in mice showed tissue and cell vulnerability consistent with Wnt-signaling intensity and individual and collective functions of Wnts in embryogenesis.
Sources: Literature
Mendeliome v0.9296 SHQ1 Zornitza Stark gene: SHQ1 was added
gene: SHQ1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SHQ1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SHQ1 were set to 34542157; 29178645
Phenotypes for gene: SHQ1 were set to Dystonia; Neurodegeneration
Review for gene: SHQ1 was set to AMBER
Added comment: Three unrelated families reported. Family 1: isolated dystonia only; Family 2: dystonia, and neurodegeneration; Family 3: neurodegeneration.

Rated Amber as phenotypes likely represent a continuum but currently unclear.
Sources: Literature
Mendeliome v0.9294 SARS Bryony Thompson gene: SARS was added
gene: SARS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SARS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SARS were set to 28236339; 34570399
Phenotypes for gene: SARS were set to Intellectual disability
Review for gene: SARS was set to AMBER
Added comment: Summary - 2 unrelated families with overlapping ID phenotype, and supporting in vitro and patient cell assays.
PMID: 28236339 - an Iranian family (distantly related) segregating a homozygous missense (c.514G>A, p.Asp172Asn) with moderate ID, microcephaly, ataxia, speech impairment, and aggressive behaviour. Also, supporting in vitro functional assays demonstrating altered protein function.
PMID: 34570399 - a consanguineous Turkish family segregating a homozygous missense (c.638G>T, p.(Arg213Leu)) with developmental delay, central deafness, cardiomyopathy, and metabolic decompensation during fever leading to death. Also, reduced protein level and enzymatic activity in patient cells.
Sources: Literature
Mendeliome v0.9285 EIF3F Zornitza Stark edited their review of gene: EIF3F: Added comment: Hüffmeier et al (2021) reported 21 patients who were homozygous/compound heterozygous for Phe232Val variant in EIF3F. All affected individuals had developmental delay and speech delay. About half had behavioural problems, altered muscular tone, hearing loss, and short stature. The study suggests that microcephaly, reduced sensitivity to pain, cleft lip/palate, gastrointestinal symptoms and ophthalmological symptoms are part of the phenotypic spectrum.; Changed publications: 30409806, 33736665; Changed phenotypes: Mental retardation, autosomal recessive 67, MIM# 618295
Mendeliome v0.9274 CDH15 Zornitza Stark commented on gene: CDH15: PMID: 19012874 - 4 unrelated patients with missense variants and mild-severe ID. Only two genes checked. All variants are common in gnomAD (>20 hets each) and classified as VUS or likely benign in ClinVar (paper is from 2008, pre-dates gnomAD). Functional studies were performed showing a LOF effect, where cell adhesion was reduced.
However NMD PTCs are present in gnomAD (many >=6 hets each)

PMID: 12052883 - null mouse model were viable, showed no gross developmental defects. In particular, the skeletal musculature appeared essentially normal. In the cerebellum of M-cadherin-lacking mutants, typical contactus adherens junctions were present and similar in size and numbers to the equivalent junctions in wild-type animals. However, the adhesion plaques in the cerebellum of these mutants appeared to contain elevated levels of N-cadherin compared to wild-type animals.

PMID: 28422132 - reviewed microdeletions spanning multiple genes including CDH15, suggests it may contribute to a more severe neurological phenotype, with particular regard to brain malformations.

PMID: 26506440 - speculates low penetrance for PTCs in this gene. Acknowledges variants in ExAC, describes them as benign

Note no P/LP variants in ClinVar
Mendeliome v0.9252 MAOB Zornitza Stark gene: MAOB was added
gene: MAOB was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: MAOB was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MAOB were set to 31700678
Phenotypes for gene: MAOB were set to Cerebral palsy
Review for gene: MAOB was set to RED
Added comment: Variants identified in 2 unrelated individuals with CP (with same variant also identified in unaffected monozygotic twin).
Sources: Expert Review
Mendeliome v0.9243 NPR3 Zornitza Stark Phenotypes for gene: NPR3 were changed from to Boudin-Mortier syndrome, MIM#619543; Tall stature, skeletal abnormalities, aortic dilatation
Mendeliome v0.9240 NPR3 Zornitza Stark reviewed gene: NPR3: Rating: GREEN; Mode of pathogenicity: None; Publications: 30032985; Phenotypes: Boudin-Mortier syndrome, MIM#619543, Tall stature, skeletal abnormalities, aortic dilatation; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9233 ZC4H2 Zornitza Stark Mode of inheritance for gene: ZC4H2 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9232 ZC4H2 Zornitza Stark reviewed gene: ZC4H2: Rating: GREEN; Mode of pathogenicity: None; Publications: 23623388, 34322088, 33949289, 31885220, 31206972; Phenotypes: Wieacker-Wolff syndrome, MIM# 314580; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9230 LRRK1 Zornitza Stark gene: LRRK1 was added
gene: LRRK1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: LRRK1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LRRK1 were set to 27829680; 27055475; 31571209; 32119750
Phenotypes for gene: LRRK1 were set to Osteosclerotic metaphyseal dysplasia (OSMD) (OMIM: 615198)
Review for gene: LRRK1 was set to GREEN
Added comment: At least 4 unrelated families reported.
Sources: Expert Review
Mendeliome v0.9216 LBX1 Zornitza Stark gene: LBX1 was added
gene: LBX1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: LBX1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LBX1 were set to 30487221
Phenotypes for gene: LBX1 were set to Central hypoventilation syndrome, congenital, 3, MIM#619483
Review for gene: LBX1 was set to AMBER
Added comment: Two siblings reported with homozygous LoF variant in this gene, supportive mouse model.
Sources: Expert Review
Mendeliome v0.9211 RAF1 Zornitza Stark Phenotypes for gene: RAF1 were changed from to Noonan syndrome 5, MIM# 611553; Cardiomyopathy, dilated, 1NN, MIM# 615916
Mendeliome v0.9207 RAF1 Zornitza Stark reviewed gene: RAF1: Rating: GREEN; Mode of pathogenicity: Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments; Publications: 17603483, 17603482, 31145547, 31030682, 29271604, 24777450; Phenotypes: Noonan syndrome 5, MIM# 611553, Cardiomyopathy, dilated, 1NN, MIM# 615916; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.9203 B9D1 Bryony Thompson changed review comment from: hNow N
PMID: 34338422 - compound het missense and frameshift variant in a proband with anal atresia with vestibular fistula, ventricular septal defect, and right renal agenesis (VACTERL cohort)
PMID: 21763481 - B9d1 -/- mouse displayed polydactyly, kidney cysts, ductal plate malformations, and abnormal patterning of the neural tube, concomitant with compromised ciliogenesis, ciliary protein localization, and Hedgehog (Hh) signal transduction.; to: 3 unrelated cases with a syndromic phenotype and a supporting null mouse model
PMID: 34338422 - compound het missense and frameshift variant in a proband with anal atresia with vestibular fistula, ventricular septal defect, and right renal agenesis (VACTERL cohort)
PMID: 24886560 - 2 Joubert syndrome cases
PMID: 21763481 - B9d1 -/- mouse displayed polydactyly, kidney cysts, ductal plate malformations, and abnormal patterning of the neural tube, concomitant with compromised ciliogenesis, ciliary protein localization, and Hedgehog (Hh) signal transduction.
Mendeliome v0.9199 PNLDC1 Zornitza Stark gene: PNLDC1 was added
gene: PNLDC1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: PNLDC1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PNLDC1 were set to 34347949
Phenotypes for gene: PNLDC1 were set to Spermatogenic failure 57, MIM# 619528
Review for gene: PNLDC1 was set to GREEN
Added comment: Four unrelated individuals reported.
Sources: Expert Review
Mendeliome v0.9171 TAF2 Zornitza Stark edited their review of gene: TAF2: Added comment: New report of 4 individuals from 2 unrelated families, with severe intellectual disability, global developmental delay, postnatal microcephaly, feet deformities and thin corpus callosum. They had homozygous TAF2 missense variants detected by Exome Sequencing.; Changed rating: GREEN; Changed publications: 21937992, 22633631, 26350204, 24084144, 34474177
Mendeliome v0.9162 GPX1 Zornitza Stark gene: GPX1 was added
gene: GPX1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: GPX1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GPX1 were set to 1131421; 476008; 5766310; 2492138
Phenotypes for gene: GPX1 were set to Haemolytic anaemia due to glutathione peroxidase deficiency MIM#614164
Review for gene: GPX1 was set to RED
Added comment: No individuals reported with GPX1 variants identified as the cause of Haemolytic anaemia due to glutathione peroxidase deficiency. Multiple papers report a number of cases of Haemolytic anaemia due to glutathione peroxidase deficiency, however there is no defined link or variant to GPX1 (PMID: 5766310. PMID: 1131421, PMID: 2492138, PMID: 476008)

Overall, lowered glutathione peroxidase activity has been observed in a number of individuals with haemolytic anaemia however the evidence for a cause-and-effect relationship between the enzyme deficiency and the presenting anaemia is not evident.
Sources: Expert Review
Mendeliome v0.9157 COL14A1 Zornitza Stark gene: COL14A1 was added
gene: COL14A1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: COL14A1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: COL14A1 were set to 22972947
Phenotypes for gene: COL14A1 were set to Punctate palmoplantar keratoderma type 1B
Review for gene: COL14A1 was set to RED
Added comment: 4 affected individuals and 2 unaffected controls from one Chinese PPPK family where disease locus was mapped at 8q24.13-8q24.21 by previous linkage analysis. Exome sequencing analysis identified a heterozygous variant in COL14A1 gene (c.4505C>T (p.Pro1502Leu)). The variant was shared by 4 affected individuals, but not 2 controls of the family. Sanger sequencing confirmed this variant in another four cases from this family. Variant was absent in the normal controls of this family as well as 676 unrelated normal controls and 781 patients with other disease. The missense substitution occurs at a highly conserved amino acid residue across multiple species.
Sources: Expert Review
Mendeliome v0.9144 STEAP3 Zornitza Stark changed review comment from: Single family reported. Three affected sibs, variant inherited from unaffected father. Some supportive functional evidence.; to: Single family reported. Three affected sibs, variant inherited from unaffected father. Some supportive functional evidence.

Conflicting evidence (PMID 26675350): Large Chinese study (of normal and α-thalassemia subjects) investigated the prevalence of STEAP3 mutations in humans and their physiologic consequences. Discovered a relatively high prevalence of potentially harmful recessive alleles. However, whilst the identified STEAP3 mutations exhibited impaired ferrireductase activity in vitro, they had little or no effect on erythrocyte phenotypes
Mendeliome v0.9125 SLC26A1 Zornitza Stark Phenotypes for gene: SLC26A1 were changed from to Nephrolithiasis, calcium oxalate, MIM#167030
Mendeliome v0.9121 SLC26A1 Zornitza Stark reviewed gene: SLC26A1: Rating: AMBER; Mode of pathogenicity: None; Publications: 27210743, 20160351, 30383413, 27125215; Phenotypes: Nephrolithiasis, calcium oxalate, MIM#167030; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.9121 RHAG Zornitza Stark Phenotypes for gene: RHAG were changed from to Anaemia, haemolytic, Rh-null, regulator type MIM# 268150; Overhydrated hereditary stomatocytosis MIM#185000
Mendeliome v0.9109 RHAG Danielle Ariti reviewed gene: RHAG: Rating: GREEN; Mode of pathogenicity: None; Publications: 30990901, 28470789, 4962358, 18931342, 21849667, 23406318; Phenotypes: Anaemia, haemolytic, Rh-null, regulator type MIM# 268150, Overhydrated hereditary stomatocytosis MIM#185000; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.9101 UMPS Zornitza Stark edited their review of gene: UMPS: Added comment: 20 unrelated patients have been reported with biallelic missense variants; one mouse model

Orotic aciduria is characterised by megaloblastic anaemia and orotic acid crystalluria, frequently associated with a degree of physical and intellectual disability. Other features include, congenital malformations (Atrial/ Ventricular septal defect) and immunodeficiencies (T-cell dysfunction, failure to thrive, recurrent infections).

Haematology features
- Megaloblastic anaemia
- Low to normal reticulocyte count
- Anisocytosis
- Poikilocytosis
- Hypochromia; Changed publications: 9042911, 33489760; Changed phenotypes: Orotic aciduria, MIM# 258900
Mendeliome v0.9098 TPI1 Zornitza Stark changed review comment from: More than 10 unrelated families reported; bi-allelic (missense, nonsense, frameshift) variants; Common p.Glu104Asp variant in Northern European population

Triosephosphate isomerase deficiency (TPID) is an autosomal recessive multisystem disorder characterised by early childhood onset congenital hemolytic anaemia, and progressive neuromuscular dysfunction. Many patients die from respiratory failure in childhood. The neurological features are variable, but usually includes lower motor neuron dysfunction with hypotonia, muscle weakness and atrophy, and hyporeflexia. Other features include intracellular accumulation of dihydroxyacetone phosphate (DHAP), particularly in red blood cells and increased susceptibility to infections.; to: More than 10 unrelated families reported; bi-allelic (missense, nonsense, frameshift) variants; Common p.Glu104Asp variant in Northern European population

Triosephosphate isomerase deficiency (TPID) is an autosomal recessive multisystem disorder characterised by early childhood onset congenital haemolytic anaemia, and progressive neuromuscular dysfunction. Many patients die from respiratory failure in childhood. The neurological features are variable, but usually includes lower motor neuron dysfunction with hypotonia, muscle weakness and atrophy, and hyporeflexia. Other features include intracellular accumulation of dihydroxyacetone phosphate (DHAP), particularly in red blood cells and increased susceptibility to infections.
Mendeliome v0.9098 TPI1 Zornitza Stark edited their review of gene: TPI1: Added comment: More than 10 unrelated families reported; bi-allelic (missense, nonsense, frameshift) variants; Common p.Glu104Asp variant in Northern European population

Triosephosphate isomerase deficiency (TPID) is an autosomal recessive multisystem disorder characterised by early childhood onset congenital hemolytic anaemia, and progressive neuromuscular dysfunction. Many patients die from respiratory failure in childhood. The neurological features are variable, but usually includes lower motor neuron dysfunction with hypotonia, muscle weakness and atrophy, and hyporeflexia. Other features include intracellular accumulation of dihydroxyacetone phosphate (DHAP), particularly in red blood cells and increased susceptibility to infections.; Changed publications: 9338582, 32873690, 8503454; Changed phenotypes: Haemolytic anaemia due to triosephosphate isomerase deficiency, MIM# 615512
Mendeliome v0.9088 PRICKLE2 Hazel Phillimore changed review comment from: Six subjects from four unrelated families with heterozygous variants (two de novo missense (c.122 C>T; p.(Pro41Leu) and c.680C>G; p.(Thr227Arg)), one de novo nonsense variant (c.214 C>T; p.(Arg72*) and one frameshift variant (c.1286_1287delGT; p.(Ser429Thrfs*56)) which segregated with the disease in three affected females.

Loss-of-function (homozygous) variants cause seizures in flies, and both heterozygous and homozygous mice showed behavioral abnormalities including altered social interaction, learning abnormalities, and behavioural inflexibility. PubMed: 21276947.; to: Six subjects from four unrelated families with neurodevelopmental delay, behavioural difficulties and epilepsy had heterozygous variants, either de novo or segregating with disease.
Two missense were de novo, c.122 C>T; p.(Pro41Leu) and c.680C>G; p.(Thr227Arg); one nonsense variant was de novo (c.214 C>T; p.(Arg72*); and one frameshift variant segregated with the disorder in three affected females (c.1286_1287delGT; p.(Ser429Thrfs*56)).

Loss-of-function (homozygous) variants have been shown to cause seizures in flies; and both heterozygous and homozygous mice have shown behavioral abnormalities including altered social interaction, learning abnormalities, and behavioral inflexibility (PubMed: 21276947).
Mendeliome v0.9081 LRP1 Seb Lunke Added comment: Comment on list classification: Two papers without related phenotypes and little overall evidence for gene disease association.
Mendeliome v0.9068 CACNA1I Kristin Rigbye gene: CACNA1I was added
gene: CACNA1I was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CACNA1I was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CACNA1I were set to 33704440
Phenotypes for gene: CACNA1I were set to Neurodevelopmental disorder
Mode of pathogenicity for gene: CACNA1I was set to Other
Review for gene: CACNA1I was set to GREEN
Added comment: 4 different missense variants identified and shown to result in a gain of function.

2 individuals with de novo variants (a 3rd also suspected de novo but their father was unavailable for testing) - these patients all had severe neurodevelopmental disorders, involving severe global developmental delay, absence of speech, gross motor delay, muscular hypotonia, early-onset seizures, cortical visual impairment, and feeding difficulties. Variable clinical features include various brain malformations, startle response or seizures, postnatal growth retardation, gastroesophageal reflux, and gastrostomy.

1 family had three affected individuals - variable cognitive impairment in all, involving borderline intellectual functioning or mild or moderate intellectual disability as main clinical feature, with late-onset seizures in the mother and speech retardation in one of the children. This variant had a milder functional effect than the variants in sporadic cases.
Sources: Literature
Mendeliome v0.9067 GLIS1 Seb Lunke changed review comment from: Functional studies in KO mice show increased intra-ocular pressure (IOT) caused by defects in the ocular drainage system. IOT is frequently associated with Glaucoma, however mice were not investigated for glaucoma, and no patients described.
Sources: Literature; to: Functional studies in KO mice show increased intra-ocular pressure (IOT) caused by defects in the ocular drainage system. IOT is frequently associated with Glaucoma, however mice were not investigated for glaucoma, and no patients described.

The authors did show dysregulation of GLIS1 in a human cell line study, and performed linkage analysis suggesting an association of the GLIS1 locus with Glaucoma in UK biobank samples.
Sources: Literature
Mendeliome v0.9065 SLC32A1 Zornitza Stark gene: SLC32A1 was added
gene: SLC32A1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SLC32A1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SLC32A1 were set to 34038384
Phenotypes for gene: SLC32A1 were set to Genetic epilepsy with febrile seizures plus
Review for gene: SLC32A1 was set to GREEN
Added comment: 8 unrelated families reported, including segregation evidence in two large pedigrees. Variants are predicted to alter γ-aminobutyric acid (GABA) transport into synaptic vesicles, leading to altered neuronal inhibition.
Sources: Literature
Mendeliome v0.9061 G6PD Zornitza Stark Mode of inheritance for gene: G6PD was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9060 G6PD Zornitza Stark reviewed gene: G6PD: Rating: GREEN; Mode of pathogenicity: None; Publications: 18177777; Phenotypes: Haemolytic anemia, G6PD deficient (favism), MIM# 300908; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.9054 DHFR Zornitza Stark Phenotypes for gene: DHFR were changed from to Megaloblastic anaemia due to dihydrofolate reductase deficiency, MIM# 613839
Mendeliome v0.9051 DHFR Zornitza Stark reviewed gene: DHFR: Rating: GREEN; Mode of pathogenicity: None; Publications: 21310276, 21310277; Phenotypes: Megaloblastic anaemia due to dihydrofolate reductase deficiency, MIM# 613839; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9037 AK1 Zornitza Stark Phenotypes for gene: AK1 were changed from to Haemolytic anaemia due to adenylate kinase deficiency, MIM# 612631
Mendeliome v0.9034 AK1 Zornitza Stark reviewed gene: AK1: Rating: GREEN; Mode of pathogenicity: None; Publications: 2542324, 9432020, 10233365, 34321014; Phenotypes: Haemolytic anemia due to adenylate kinase deficiency, MIM# 612631; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9021 CHRM1 Bryony Thompson gene: CHRM1 was added
gene: CHRM1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CHRM1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CHRM1 were set to 34212451; 31981491; 12483218
Phenotypes for gene: CHRM1 were set to Neurodevelopmental delay; intellectual disability; autism
Review for gene: CHRM1 was set to AMBER
Added comment: PMID: 34212451 - 2 unrelated cases with de novo missense variants (p.Pro380Leu and p.Phe425Ser), one case with early-onset refractory epilepsy, severe disability, and progressive cerebral and cerebellar atrophy, and the second case with mild dysmorphism, global developmental delay, and moderate intellectual disability. In vitro biochemical analyses of p.Pro380Leu demonstrated a reduction in protein levels, impaired cellular trafficking, and defective activation of intracellular signaling pathways.
PMID: 31981491 - an autism spectrum disorder (no other information on phenotype, except ascertained to have severe neurodevelopmental delay) case with a de novo missense variant p.(Arg210Leu)
PMID: 12483218 - null mouse model assessing memory demonstrated selective cognitive dysfunction.
Sources: Literature
Mendeliome v0.9012 NPR2 Zornitza Stark changed review comment from: Over 15 unrelated families; Biallelic (missense, nonsense, frameshift, splice) NPR2 variants; loss of function; multiple mouse models.

Disorder is characterised by severe dwarfism with shortening of the middle and distal segments of the limbs (disproportionate) with skeletal growth falling off sharply after birth.; to: Bi-allelic variants: Over 15 unrelated families; Biallelic (missense, nonsense, frameshift, splice) NPR2 variants; loss of function; multiple mouse models.

Disorder is characterised by severe dwarfism with shortening of the middle and distal segments of the limbs (disproportionate) with skeletal growth falling off sharply after birth.

Mono-allelic variants have been linked to both tall stature and short stature disorders. Multiple families.
Mendeliome v0.9009 SHOX2 Zornitza Stark gene: SHOX2 was added
gene: SHOX2 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: SHOX2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SHOX2 were set to 30443179
Phenotypes for gene: SHOX2 were set to Sinus Node Dysfunction; Atrial Fibrillation
Review for gene: SHOX2 was set to RED
Added comment: Single family reported with LoF in this gene and AF.
Sources: Expert Review
Mendeliome v0.8987 FAME2 Bryony Thompson STR: FAME2 was added
STR: FAME2 was added to Mendeliome. Sources: Literature
Mode of inheritance for STR: FAME2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for STR: FAME2 were set to 11701600; 24114805; 31664034
Phenotypes for STR: FAME2 were set to Epilepsy, familial adult myoclonic, 2 MIM#607876
Review for STR: FAME2 was set to GREEN
STR: FAME2 was marked as clinically relevant
Added comment: NM_020151.3(STARD7):c.291-1572ATTTT[X]ATTTC[X]
158 affected individuals from 22 unrelated families with familial adult myoclonic epilepsy with a heterozygous 5-bp repeat expansion (ATTTC)n in intron 1. Affected individuals had variable expansion of an endogenous (ATTTT)n repeat in addition to the insertion of an abnormal (ATTTC)n repeat, similar molecular finding in other forms of FAME. RNA sequencing from patient derived fibroblasts shows no accumulation of the AUUUU or AUUUC repeat sequences and no effect on STARD7 gene expression, suggesting ATTTC expansions may cause FAME irrespective of the genomic locus involved.
Sources: Literature
Mendeliome v0.8981 PI4KA Zornitza Stark edited their review of gene: PI4KA: Added comment: Neurodevelopmental syndrome with hypomyelinating leukodystrophy: 10 unrelated patients harbouring biallelic variants in PI4KA reported with a spectrum of severe global neurodevelopmental delay, hypomyelination, and developmental brain abnormalities, and pure spastic paraplegia. Some patients presented immunological deficits or genito-urinary abnormalities. Western blotting and immunofluorescence showed decreased PI4KA levels in the patients' fibroblasts. Immunofluorescence and targeted lipidomics indicated that PI4KA activity was diminished in fibroblasts and peripheral blood mononuclear cells.; Changed rating: GREEN; Changed publications: 25855803, 34415322; Changed phenotypes: Polymicrogyria, perisylvian, with cerebellar hypoplasia and arthrogryposis, MIM# 616531, Neurodevelopmental syndrome with hypomyelinating leukodystrophy
Mendeliome v0.8980 NIID Bryony Thompson STR: NIID was added
STR: NIID was added to Mendeliome. Sources: Literature
Mode of inheritance for STR: NIID was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for STR: NIID were set to 31178126; 31332381; 31819945; 33887199; 33943039; 32250060; 31332380; 32852534; 32989102; 34333668
Phenotypes for STR: NIID were set to Neuronal intranuclear inclusion disease MIM#603472; Oculopharyngodistal myopathy 3 MIM#619473; Tremor, hereditary essential, 6 MIM#618866
Review for STR: NIID was set to GREEN
STR: NIID was marked as clinically relevant
Added comment: NM_001364012.2:c.-164GGC[X]
Expanded repeat in NOTCH2NLC sequence is (GGC)9(GGA)2(GGC)2.
Large number of families and sporadic cases reported with expansions, with a range of neurodegenerative phenotypes, including: dementia, Parkinsonism/tremor, peripheral neuropathy, leukoencephalopathy, myopathy, motor neurone disease.
Normal repeat range: 4-40, 1 control had 61 repeats and may have been a presymptomatic carrier.
Intermediate range: 41-60 identified in Parkinson's disease
Pathogenic repeat range: >=60-520
Mechanism of disease is translation of repeat expansion into a toxic polyglycine protein, identified in both mouse models and tissue samples from affected individuals.
Sources: Literature
Mendeliome v0.8969 MYO1H Zornitza Stark gene: MYO1H was added
gene: MYO1H was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MYO1H was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MYO1H were set to 28779001
Phenotypes for gene: MYO1H were set to Central hypoventilation syndrome, congenital, 2, and autonomic dysfunction, MIM#619482
Review for gene: MYO1H was set to RED
Added comment: Single family reported with three affected children, homozygous LoF variant.
Sources: Literature
Mendeliome v0.8962 TBX1 Zornitza Stark Phenotypes for gene: TBX1 were changed from to DiGeorge syndrome MIM# 188400; Velocardiofacial syndrome MIM# 192430; Decreased T cells; Hypoparathyroidism; Conotruncal cardiac malformation; velopalatal insufficiency; abnormal facies (cleft palate, prominent tubular nose etc); intellectual disability; Immunodeficiency; thymic hypoplasia or aplasia with resultant T‐cell dysfunction; renal anomalies; autoimmunity
Mendeliome v0.8959 TBX1 Zornitza Stark reviewed gene: TBX1: Rating: GREEN; Mode of pathogenicity: None; Publications: 20301696, 31830774, 16684884; Phenotypes: DiGeorge syndrome MIM# 188400, Velocardiofacial syndrome MIM# 192430, Decreased T cells, Hypoparathyroidism, Conotruncal cardiac malformation, velopalatal insufficiency, abnormal facies (cleft palate, prominent tubular nose etc), intellectual disability, Immunodeficiency, thymic hypoplasia or aplasia with resultant T‐cell dysfunction, renal anomalies, autoimmunity; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.8959 RTEL1 Zornitza Stark Phenotypes for gene: RTEL1 were changed from to Dyskeratosis congenita, autosomal dominant 4 MIM# 615190; Dyskeratosis congenita, autosomal recessive 5 MIM# 615190; Pulmonary fibrosis and/or bone marrow failure, telomere-related, 3 MIM# 616373
Mendeliome v0.8956 RTEL1 Zornitza Stark reviewed gene: RTEL1: Rating: GREEN; Mode of pathogenicity: None; Publications: 20301779, 23329068, 15210109, 23453664, 19461895, 25848748, 25607374; Phenotypes: Dyskeratosis congenita, autosomal dominant 4 MIM# 615190, Dyskeratosis congenita, autosomal recessive 5 MIM# 615190, Pulmonary fibrosis and/or bone marrow failure, telomere-related, 3 MIM# 616373; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.8956 RMRP Zornitza Stark changed review comment from: Over 60 pathogenic RMRP variants have been reported resulting in CHH phenotypes; multiple mouse models

Homozygous and Compound heterozygous (insertions, duplications and missense) variants have been reported resulting in loss of function.
*Founder variant g.70A>G (Amish and Finnish populations)

CHH individuals present with variable features that may include: shortened limbs, short stature, metaphysical dysplasia, fine, sparse and/or light-coloured hair, hematologic abnormalities and a spectrum of combined immunodeficiency.; to: Over 60 pathogenic RMRP variants have been reported resulting in CHH phenotypes; multiple mouse models

Homozygous and Compound heterozygous (insertions, duplications and missense) variants have been reported resulting in loss of function.
*Founder variant g.70A>G (Amish and Finnish populations)

CHH individuals present with variable features that may include: shortened limbs, short stature, metaphysical dysplasia, fine, sparse and/or light-coloured hair, hematologic abnormalities and a spectrum of combined immunodeficiency.

Anauxetic dysplasia 1, MIM# 607095 is a more severe phenotype, whereas Metaphyseal dysplasia without hypotrichosis, MIM# 250460 is milder.
Mendeliome v0.8940 EDEM3 Zornitza Stark Phenotypes for gene: EDEM3 were changed from Congenital disorder of glycosylation; Developmental delay to Congenital disorder of glycosylation, type 2V, MIM# 619493
Mendeliome v0.8939 EDEM3 Zornitza Stark reviewed gene: EDEM3: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Congenital disorder of glycosylation, type 2V, MIM# 619493; Mode of inheritance: None
Mendeliome v0.8935 MTHFD1 Danielle Ariti reviewed gene: MTHFD1: Rating: GREEN; Mode of pathogenicity: None; Publications: Combined immunodeficiency and megaloblastic anemia with or without hyperhomocysteinaemia MIM # 617780, Decreased Ig levels, poor antibody responses to conjugated polysaccharide antigens, low B/T/NK cells, Recurrent bacterial infection, megaloblastic anaemia, failure to thrive, neutropenia, seizures, intellectual disability, folate-responsive, Lymphopaenia; Phenotypes: 32414565, 19033438; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8932 GHSR Zornitza Stark Phenotypes for gene: GHSR were changed from to Growth hormone deficiency, isolated partial, MIM# 615925
Mendeliome v0.8928 GHSR Zornitza Stark reviewed gene: GHSR: Rating: AMBER; Mode of pathogenicity: None; Publications: 25557026, 19789204, 16511605; Phenotypes: Growth hormone deficiency, isolated partial, MIM# 615925; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.8927 GHRHR Zornitza Stark Phenotypes for gene: GHRHR were changed from to Growth hormone deficiency, isolated, type IV, MIM# 618157
Mendeliome v0.8924 GHRHR Zornitza Stark reviewed gene: GHRHR: Rating: GREEN; Mode of pathogenicity: None; Publications: 8528260, 10084571, 11232012; Phenotypes: Growth hormone deficiency, isolated, type IV, MIM# 618157; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8913 GH1 Zornitza Stark Phenotypes for gene: GH1 were changed from to Growth hormone deficiency, isolated, type IA, MIM# 262400; Growth hormone deficiency, isolated, type II, MIM# 173100; Kowarski syndrome, MIM# 262650
Mendeliome v0.8910 GH1 Zornitza Stark reviewed gene: GH1: Rating: GREEN; Mode of pathogenicity: None; Publications: 2840669, 1603635, 12655557, 15671105, 8552145, 9276733, 15713716; Phenotypes: Growth hormone deficiency, isolated, type IA, MIM# 262400, Growth hormone deficiency, isolated, type II, MIM# 173100, Kowarski syndrome, MIM# 262650; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.8900 RNU4ATAC Zornitza Stark edited their review of gene: RNU4ATAC: Added comment: Lowry-Wood syndrome (LWS) is characterized by multiple epiphyseal dysplasia and microcephaly. Patients exhibit intrauterine growth retardation and short stature, as well as developmental delay and intellectual disability. Retinal degeneration has been reported in some patients.

Four unrelated families reported.

Note features between the three RNU4ATAC-related conditions overlap and they may not represent distinct disorders.; Changed rating: GREEN; Changed publications: 29265708, 12605445; Changed phenotypes: Lowry-Wood syndrome, MIM# 226960; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8891 JPH2 Zornitza Stark Phenotypes for gene: JPH2 were changed from Cardiomyopathy, hypertrophic, MIM#613873; dilated cardiomyopathy to Cardiomyopathy, hypertrophic, MIM#613873; Cardiomyopathy, dilated, 2E, MIM# 619492
Mendeliome v0.8890 JPH2 Zornitza Stark edited their review of gene: JPH2: Changed phenotypes: Cardiomyopathy, hypertrophic, MIM#613873, Cardiomyopathy, dilated, 2E, MIM# 619492
Mendeliome v0.8889 ZNF699 Zornitza Stark gene: ZNF699 was added
gene: ZNF699 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZNF699 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZNF699 were set to 33875846
Phenotypes for gene: ZNF699 were set to DEGCAGS syndrome, MIM# 619488
Review for gene: ZNF699 was set to GREEN
Added comment: DEGCAGS syndrome is a neurodevelopmental disorder characterized by global developmental delay, coarse and dysmorphic facial features, and poor growth and feeding apparent from infancy. Affected individuals have variable systemic manifestations often with significant structural defects of the cardiovascular, genitourinary, gastrointestinal, and/or skeletal systems. Additional features may include sensorineural hearing loss, hypotonia, anaemia or pancytopaenia, and immunodeficiency with recurrent infections.

12 unrelated families reported, 5 different homozygous frameshift variants.
Sources: Literature
Mendeliome v0.8886 SMC1A Zornitza Stark reviewed gene: SMC1A: Rating: GREEN; Mode of pathogenicity: None; Publications: 29023665, 31409060, 31334757, 28166369; Phenotypes: Cornelia de Lange syndrome 2, MIM# 300590, Epileptic encephalopathy, early infantile, 85, with or without midline brain defects, MIM# 301044; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.8880 PAPPA2 Zornitza Stark gene: PAPPA2 was added
gene: PAPPA2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PAPPA2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PAPPA2 were set to 26902202; 34272725; 32739295
Phenotypes for gene: PAPPA2 were set to Short stature, Dauber-Argente type, MIM#619489
Review for gene: PAPPA2 was set to GREEN
Added comment: Short stature of the Dauber-Argente type (SSDA) is characterized by progressive postnatal growth failure, moderate microcephaly, thin long bones, and mildly decreased bone density. Patients have elevated circulating levels of total IGF1 due to impaired proteolysis of IGFBP3 and IGFBP5, resulting in reduced free IGF1.

7 individuals from 3 unrelated families reported, mouse model.
Sources: Literature
Mendeliome v0.8861 IGF2 Zornitza Stark changed review comment from: RSS phenotype.; to: Silver-Russell syndrome-3 (SRS3) is characterized by intrauterine growth retardation with relative macrocephaly, followed by feeding difficulties and postnatal growth restriction. Dysmorphic facial features include triangular face, prominent forehead, and low-set ears. Other variable features include limb defects, genitourinary and cardiovascular anomalies, hearing impairment, and developmental delay. Disruption of any gene in the HMGA2-PLAG1-IGF2 pathway results in a decrease in IGF2 expression and produces an SRS phenotype similar to that of patients carrying 11p15.5 epigenetic defects.

Begemann et al. (2015) performed exome sequencing in 4 affected people with severe growth restriction in one family, and identified a heterozygous nonsense mutation in the IGF2 gene that segregated fully with the disorder. Affected individuals inherited the mutation from their healthy fathers, and it originated from the healthy paternal grandmother. Clinical features occurred only in those who inherited the variant allele through paternal transmission, consistent with maternal imprinting of IGF2.

Many other cases reported since with de novo mutations in IGF2 present on the paternal allele.
Mendeliome v0.8853 PLAG1 Zornitza Stark edited their review of gene: PLAG1: Added comment: Additional families reported, upgrade to Green.

Silver-Russell syndrome-4 (SRS4) is characterised by intrauterine growth retardation followed by feeding difficulties and postnatal growth restriction. Dysmorphic facial features include triangular face and prominent forehead, and relative macrocephaly at birth may be observed. So far 4 families have been reported with some functional studies of the role of the gene in the growth pathway.

Abi Habib et al. (2018) reported 1 family (child, sister and mother) patient with Silver-Russell syndrome (with normal methylation on chromosomes 7, 11, and 14, and exclusion of maternal UPD and chromosomal rearrangements). Using WES they identified a heterozygous 1-bp deletion in the PLAG1 gene. The variant segregated with disease, and was not present in polymorphism databases or ExAC. They also reported another patient with a different heterozygous 1-bp deletion in the PLAG1 gene. This was not found in her unaffected twin brother, older brother, or parents. Experiments in Hep3b cells demonstrated that PLAG1 positively regulates expression of the IGF2 promoter P3, independently and via the HMGA2-PLAG1-IGF2 pathway. Disruption of any gene in the pathway results in a decrease in IGF2 expression and produces an SRS phenotype similar to that of patients carrying 11p15.5 epigenetic defects (SRS1; 180860), except for body asymmetry, which is not expected to occur since the molecular defects are present in all cells of the body, unlike the mosaic epigenetic changes at the 11p15.5 locus.

Inoue et al. (2020) reported 1 family with 2 affected people with Silver-Russell syndrome with a nonsense variant in the PLAG1 gene, which segregated with disease.

Vado et al. (2020) reported 1 family with multiple affected people with Silver-Russell syndrome with a frameshift variant in the PLAG1 gene, which segregated with disease.; Changed rating: GREEN; Changed publications: 28796236, 29913240, 33291420, 32546215
Mendeliome v0.8851 WIPF1 Zornitza Stark Phenotypes for gene: WIPF1 were changed from to Wiskott-Aldrich syndrome 2 MIM# 614493; Reduced T cells; defective lymphocyte responses to anti-CD3; high IgE; Thrombocytopenia with or without small platelets; recurrent bacterial and viral Infections; eczema; bloody diarrhoea; gastrointestinal bleeding; WAS protein absent
Mendeliome v0.8838 PGRMC1 Bryony Thompson Phenotypes for gene: PGRMC1 were changed from Premature ovarian failure to Premature ovarian failure; Isolated paediatric cataract
Mendeliome v0.8836 WIPF1 Danielle Ariti reviewed gene: WIPF1: Rating: GREEN; Mode of pathogenicity: None; Publications: 22231303, 27742395, 11869681, 14757742; Phenotypes: Wiskott-Aldrich syndrome 2 MIM# 614493, Reduced T cells, defective lymphocyte responses to anti-CD3, high IgE, Thrombocytopenia with or without small platelets, recurrent bacterial and viral Infections, eczema, bloody diarrhoea, gastrointestinal bleeding, WAS protein absent; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8835 PGRMC1 Bryony Thompson reviewed gene: PGRMC1: Rating: AMBER; Mode of pathogenicity: None; Publications: 33867527, 23783460; Phenotypes: Isolated paediatric cataract; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Mendeliome v0.8835 ALS2 Teresa Zhao gene: ALS2 was added
gene: ALS2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ALS2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ALS2 were set to PMID: 30128655; 33409823
Phenotypes for gene: ALS2 were set to Infantile onset ascending spastic paralysis (MIM#607225); Juvenile amyotrophic lateral sclerosis 2 (MIM#205100); Juvenile primary lateral sclerosis (MIM#606353)
Review for gene: ALS2 was set to GREEN
Added comment: >50 variants reported in multiple individuals with Infantile onset ascending spastic paralysis, mostly originated from the Middle East and Mediterranean countries.
Sources: Literature
Mendeliome v0.8834 RNF220 Zornitza Stark gene: RNF220 was added
gene: RNF220 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RNF220 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RNF220 were set to 33964137; 10881263
Phenotypes for gene: RNF220 were set to Leukodystrophy; CNS hypomyelination; Ataxia; Intellectual disability; Sensorineural hearing impairment; Elevated hepatic transaminases; Hepatic fibrosis; Dilated cardiomyopathy; Spastic paraplegia; Dysarthria; Abnormality of the corpus callosum
Review for gene: RNF220 was set to GREEN
Added comment: Sferra et al (2021 - PMID: 33964137) provide extensive evidence that biallelic RNF220 mutations cause a disorder characterized by hypomyelinating leukodystrophy, ataxia (9/9 - onset 1-5y), borderline intellectual functioning (3/9) / intellectual disability (5/9 - in most cases mild), sensorineural deafness (9/9) with complete hearing loss in the first decade of life, hepatopathy (9/9) with associated periportal fibrosis, and dilated cardiomyopathy (9/9) which was fatal.

Other neurologic manifestations apart from ataxia incl. hyperreflexia (8/8), spastic paraplegia (9/9), dysarthria (9/9), peripheral neuropathy (4/9), seizures in one case (1/9). Upon brain MRI there was thin corpus callosum (9/9) or cerebellar atrophy in some (2/9).

The authors identified homozygosity for 2 recurrent missense RNF220 variants in affected members belonging to these 5 broad consanguineous pedigrees (7 families), namely NM_018150.4:c.1094G>A / p.Arg365Gly in 4 Roma families in the context of a shared haplotype (/founder effect) as well as c.1088G>A / p.Arg363Gly in a large pedigree from southern Italy initially reported by Leuzzi et al (2000 - PMID: 10881263).

Extensive segregation analyses were carried out including several affected and unaffected members.

RNF220 encodes ring finger protein 220, which functions as an E3 ubiquitin ligase. Previous studies have shown among others a role in modulation of Sonic hedgehog/GLI signaling and cerebellar development

Evidence for the role of RNF220 included relevant expression, localization within the cell, interaction partners (lamin B1, 20S proteasome), similarities with other laminopathies in terms of phenotype, etc :
*RNF220 has a relevant expression pattern in CNS (based on qRT-PCR analyses in human brain, cerebellum, cerebral cortex / mRNA levels in human fetal CNS with higher expression in cerebellum, spinal cord and cortex / previous GTEx data / protein levels in mouse CNS)
*The protein displays nuclear localization based on iPSC cells differentiated to motor neurons (also supported by data from the Human Protein Atlas). Transfection of COS-1 cells demonstrated localization primarily to the nucleus (as also previously demonstrated in HEK293T cells) in vesicle like structures with ASF2/SF2 colocalization suggesting enrichment in nuclear speckles. There was also partial co-distribution with the 20S proteasome. R363Q and R365Q additionally coalesced in the cytoplasm forming protein aggregates/inclusions.
*Immunofluorescence studies in patient fibroblasts also confirmed abnormal increase of the protein in the cytoplasm and increased fluorescence with the 20S proteasome.
*Proteomic identification of RNF220-interacting proteins in transfected HEK293T cells demonstrated enrichment for all members of the lamin protein family (incl . lamin B1, AC, B2).
*RNAi-mediated downregulation of RNF222 in Drosophila suggested altered subcellular localization and accumulation of the fly orthologue for human lamin B1.
*Immunoprecipitation of lamin B1 from the nuclear matrix of cerebellar cells suggested significant interaction of endogenous lamin B1 with RNF220, while transfection studies in HEK293T cells for wt/mt suggested reduced binding to endogenous lamin B1 for RNF220 mt compared to wt (more prominent for R365Q). RNF220 mutants also reduced ubiquitination of nuclear lamin B1 compared to wt.
*Patient fibroblasts immunostained with different nuclear envelope markers displayed abnormal nuclear shapes with multiple invaginations and lobulations, findings also observed in laminopathies.
Sources: Literature
Mendeliome v0.8829 ARF3 Zornitza Stark gene: ARF3 was added
gene: ARF3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ARF3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ARF3 were set to 34346499
Phenotypes for gene: ARF3 were set to Global developmental delay; Intellectual disability; Seizures; Morphological abnormality of the central nervous system
Review for gene: ARF3 was set to AMBER
Added comment: Sakamoto et al (2021 - PMID: 34346499) provide some evidence that monoallelic ARF3 pathogenic variants may be associated with a NDD with brain abnormality.

Using trio exome sequencing, the authors identified 2 individuals with NDD harboring de novo ARF3 variants, namely: NM_001659.2:c.200A>T / p.Asp67Val and c.296G>T / p.Arg99Leu.

Individual 1 (with Asp67Val / age : 4y10m), appeared to be more severelely affected with prenatal onset progressive microcephaly, severe global DD, epilepsy. Upon MRI there was cerebellar and brainstem atrophy. Individual 2 (Arg99Leu / 14y) had severe DD and ID (IQ of 23), epilepsy and upon MRI cerebellar hypoplasia. This subject did not exhibit microcephaly. Common facial features incl. broad nose, full cheeks, small philtrum, strabismus, thin upper lips and abnormal jaw. There was no evidence of systemic involvement in both.

ARF3 encodes ADP-ribosylation factor 3. Adenosine diphosphate ribosylation factors (ARFs) are key proteins for regulation of cargo sorting at the Golgi network, with ARF3 mainly working at the trans-Golgi network. ARFs belong to the small GTP-binding protein (G protein) superfamily. ARF3 switches between an active GTP-bound form and an inactive GDP-bound form, regulated by guanine nucleotide exchange factors (GEFs) and GTPase activating proteins (GAPs) respectively.

Members of the ARF superfamily regulate various aspects of membrane traffic, among others in neurons.

There are 5 homologs of ARF families, divided in 3 classes. ARF3 and ARF1 belong to class I. Monoallelic ARF1 mutations are associated with Periventricular nodular heterotopia 8 (MIM 618185).

In vivo, in vitro and in silico studies for the 2 variants suggest that both impair the Golgi transport system although each variant most likely exerts a different effect (gain-of-function for Arg99Leu vs loss-of-function/dominant-negative for Asp67Val).

This was also reflected in somewhat different phenotype of the subjects with the respective variants. Common features included severe DD, epilepsy and brain abnormalities although Asp67Val was associated with diffuse brain atrophy as well as congenital microcephaly and Arg99Leu with cerebellar hypoplasia.

Evidence to support the effect of each variant include:

Arg99Leu:
Had identical Golgi localization to that of wt
Had increased binding activity with GGA1, a protein recruited by the GTP-bound active form of ARF3 to the TGN membrane (supporting GoF)
In silico structural analysis suggested it may fail to stabilize the conformation of Asp26, resulting in impaired GTP hydrolysis (GoF).
In transgenic fruit flies, evaluation of the ARF3 variant toxicity using the rough eye phenotype this variant was associated with increased severity of the r-e phenotype similar to a previously studied GoF variant (Gln71Leu)

Asp67Val:
Did not show a Golgi-like pattern of localization (similar to Thr31Asn a previously studied dominant-negative variant)
Displayed decreased protein stability
In silico structural analysis suggested that Asp67Val may lead to compromised binding of GTP or GDP (suggestive of LoF)
In transgenic Drosophila eye-specific expression of Asp67Val (similar to Thr31Asn, a known dominant-negative variant) was lethal possibly due to high toxicity in very small amounts in tissues outside the eye.

There is no associated phenotype in OMIM, G2P or SysID.
Sources: Literature
Mendeliome v0.8824 PLXNA2 Zornitza Stark gene: PLXNA2 was added
gene: PLXNA2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PLXNA2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PLXNA2 were set to 34327814
Phenotypes for gene: PLXNA2 were set to Intellectual disability; Abnormality of the face; Failure to thrive; Abnormal heart morphology
Review for gene: PLXNA2 was set to AMBER
Added comment: Altuame et al (2021 - PMID: 34327814) describe 3 individuals from 2 consanguineous Arab families with biallelic PLXNA2 variants.

The index patient from the 1st family presented with CHD (hypoplastic right ventricle, ASD), DD and moderate ID (IQ of 40), failure to thrive as well as some dysmorphic features (obtuse mandibular angle, mild overbite, synophrys with downslanting p-f, strabismus, etc). There were additional features (eg. postaxial polydactyly) which were found in other affected and unaffected family members.

Exome sequencing with autozygome analysis revealed homozygosity for a PLXNA2 stopgain variant (NM_025179:c.3603C>A / p.(Cys1201*)).

Sanger confirmation was carried out and segregation analyses confirmed carrier status of the unaffected parents and a sib as well as a brother homozygous for the same variant. Clinical evaluation of the latter, following this finding revealed borderline intellectual functioning, ADHD, failure to thrive. There was no mandibular anomaly or overbite and no clinical evidence of CHD (no echo performed).

The index patient from the 2nd consanguineous family was evaluated for ID (IQ of 63), with previous borderline motor development, ADHD and some dysmorphic features (obtuse mandibular angle and overbite). There was no clinical evidence of CHD (no echo performed).

Exome sequencing with autozygosity mapping revealed a homozygous missense PLXNA2 variant (c.3073G>A / p.(Asp1025Asn), present only once in gnomAD (htz), with rather non-concordant in silico predictions SIFT 0.22, PolyPhen 0.682 and CADD 23.5. The aa was however highly conserved.

Segregation analysis confirmed carrier state of the parents and 2 unaffected sibs, with a 3rd sib homozygous for the wt allele.

As the authors discuss:
*PLXNA2 belongs to the plexin family of genes, encoding transmbembrane proteins functioning as semaphorin receptors. It has predominant expression in neural tissue. The protein is thought to bind semaphorin-3A, -3C or -5 followed by plexin A2 dimerization, activation of its GTPase-activating protein domain, negative regulation of Rap1B GTPase and initiation of a signal transduction cascade mediating axonal repulsion/guidance, dendritic guidance, neuronal migration.
*Murine Plxna2 knockout models display structural brain defects. In addition they display congenital heart defects incl. persistent truncus arteriosus and interrupted aortic arch.
*Rare CNVs in adult humans with tetralogy of Fallot have suggested a potential role of PLXNA2 in cardiac development and CHD.
*Expression and the role of PLXNA2 in human chondrocytes as well as a GWAS in 240 japanese patients with mandibular prognathism where PLXNA2 was suggested as a susceptibility locus.

Overall, the authors recognize some common features (as for cognitive functioning, some dysmorphic features incl. obtuse mandibular angle and overbite in 2 unrelated subjects, failure to thrive 3/3) and provide plausible explanations for the variability / discordance of others eg:
- Cyanotic heart disease explaining discordance in cognitive outcome among sibs
- Incomplete penetrance for CHD (and/or ID or mandibular anomaly) as for few AR disorders and/or
- Additional pathogenic variants possibly explaining the CHD in the first subject.

There is no associated phenotype in OMIM or G2P. SysID includes PLXNA2 among the candidate ID genes.
Sources: Literature
Mendeliome v0.8807 VPS50 Zornitza Stark gene: VPS50 was added
gene: VPS50 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: VPS50 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: VPS50 were set to 34037727
Phenotypes for gene: VPS50 were set to Neonatal cholestatic liver disease; Failure to thrive; Profound global developmental delay; Postnatal microcephaly; Seizures; Abnormality of the corpus callosum
Review for gene: VPS50 was set to AMBER
Added comment: Schneeberger et al (2021 - PMID: 34037727) describe the phenotype of 2 unrelated individuals with biallelic VPS50 variants.

Common features included transient neonatal cholestasis, failure to thrive, severe DD with failure to achieve milestones (last examination at 2y and 2y2m respectively), postnatal microcephaly, seizures (onset at 6m and 25m) and irritability. There was corpus callosum hypoplasia on brain imaging.

Both individuals were homozygous for variants private to each family (no/not known consanguinity applying to each case). The first individual was homozygous for a splicing variant (NM_017667.4:c.1978-1G>T) and had a similarly unaffected sister deceased with no available DNA for testing. The other individual was homozygous for an in-frame deletion (c.1823_1825delCAA / p.(Thr608del)).

VPS50 encodes a critical component of the endosome-associated recycling protein (EARP) complex, which functions in recycling endocytic vesicles back to the plasma membrane [OMIM based on Schindler et al]. The complex contains VPS50, VPS51, VPS52, VPS53, the three latter also being components of GARP (Golgi-associated-retrograde protein) complex. GARP contains VPS54 instead of VPS50 and is required for trafficking of proteins to the trans-golgi network. Thus VPS50 (also named syndetin) and VPS54 function in the EARP and GARP complexes, to define directional movement of their endocytic vesicles [OMIM based on Schindler et al]. The VPS50 subunit is required for recycling of the transferrin receptor.

As discussed by Schneeberger et al (refs provided in text):
- VPS50 has a high expression in mouse and human brain as well as throughout mouse brain development.
- Mice deficient for Vps50 have not been reported. vps50 knockdown in zebrafish results in severe developmental defects of the body axis. Knockout mice for other proteins of the EARP/GARP complex (e.g. Vps52, 53 and 54) display embryonic lethality.

Studies performed by Schneeberger et al included:
- Transcript analysis for the 1st variant demonstrated skipping of ex21 (in patient derived fabriblasts) leading to an in frame deletion of 81 bp (r.1978_2058del) with predicted loss of 27 residues (p.Leu660_Leu686del).
- Similar VPS50 mRNA levels but significant reduction of protein levels (~5% and ~8% of controls) were observed in fibroblasts from patients 1 and 2. Additionally, significant reductions in the amounts of VPS52 and VPS53 protein levels were observed despite mRNA levels similar to controls. Overall, this suggested drastic reduction of functional EARP complex levels.
- Lysosomes appeared to have similar morphology, cellular distribution and likely unaffected function in patient fibroblasts.
- Transferrin receptor recycling was shown to be delayed in patient fibroblasts suggestive of compromise of endocytic-recycling function.

As the authors comment, the phenotype of both individuals with biallelic VPS50 variants overlaps with the corresponding phenotype reported in 15 subjects with biallelic VPS53 or VPS51 mutations notably, severe DD/ID, microcephaly and early onset epilepsy, CC anomalies. Overall, for this group, they propose the term "GARP and/or EARP deficiency disorders".

There is no VPS50-associated phenotype in OMIM or G2P. SysID includes VPS50 among the ID candidate genes.
Sources: Literature
Mendeliome v0.8803 AMTN Zornitza Stark gene: AMTN was added
gene: AMTN was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: AMTN was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: AMTN were set to 27412008; 25715379; 26620968
Phenotypes for gene: AMTN were set to Amelogenesis imperfecta, type IIIB
Mode of pathogenicity for gene: AMTN was set to Other
Review for gene: AMTN was set to RED
Added comment: In a Costa Rican family segregating autosomal dominant hypomineralized amelogenesis imperfecta, Smith et al. (2016) identified a heterozygous deletion/insertion mutation in the amelotin gene that segregated with the phenotype in the family. The mutation was predicted to result in an in-frame deletion of 92 amino acids, shortening the protein from 209 to 117 amino acids. Mode of pathogenicity not established. Toxic gain of function proposed as Atmn KO and +/- mice did not recapitulate the human phenotype.
Sources: Expert Review
Mendeliome v0.8780 ITGB6 Zornitza Stark gene: ITGB6 was added
gene: ITGB6 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: ITGB6 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ITGB6 were set to 25431241; 26695873; 24305999; 24319098
Phenotypes for gene: ITGB6 were set to Amelogenesis imperfecta, type IH, MIM# 616221
Review for gene: ITGB6 was set to GREEN
Added comment: At least 3 unrelated families reported.
Sources: Expert Review
Mendeliome v0.8750 AMELX Zornitza Stark Mode of inheritance for gene: AMELX was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.8749 AMELX Zornitza Stark reviewed gene: AMELX: Rating: GREEN; Mode of pathogenicity: None; Publications: 17189466, 22243263, 7599636, 23251683, 1483698 1916828, 9188994, 15111628, 11201048, 26502894, 7782077, 11922869, 28130977, 8406474, 11839357, 25117480, 19610109; Phenotypes: Amelogenesis imperfecta, type 1E, MIM# 301200; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.8741 TCF7L2 Zornitza Stark changed review comment from: 2 reviews
Konstantinos Varvagiannis (Other)
I don't know

Dias et al (2021 - PMID: 34003604) describe the phenotype of 11 unrelated individuals harboring de novo missense/truncating TCF7L2 variants.

Features included DD in childhood (motor delay in 8/11, speech delay in 11/11), intellectual abilities ranging from average cognitive functioning to mild/moderate ID (the latter observed in 5/11), myopia (6/11) , dysmorphic features, variable orthopedic findings, and neuropsychiatric comorbidities incl. ASD (4/11) / ADHD (4/11).

One additional (12th) individual was excluded from this summary due to concurrent diagnosis of hypoxic-ischemic injury.

TCF7L2 on 10q25 encodes transcription factor 7-like 2, a high mobility group (HMG) box-containing transcription factor. As the authors discuss, the protein mediates canonical Wnt signaling. Secreted Wnt proteins lead to release of beta-catenin (CTNNB1) which after translocation to the nucleus acts with DNA-binding factors incl. TCF7L2 to turn on Wnt-responsive target genes. As a result TCF7L2 acts with beta-catenin as a switch for transcriptional regulation. Multiple alternative spliced TCF7L2 transcripts mediate it's function and specificity of transcriptional repertoire in a variety of tissues and contexts.

Dias et al provide references for its role in nervous system development incl. neurogenesis and thalamic development.

Variants in all cases occurred as de novo events with pLoF (stopgain, frameshift, splicing) ones predicted to lead to NMD. Missense variants occurred in all cases in or adjacent to the HMG box domain [aa 350-417]. 5 different missense variants affecting 3 residues were reported incl. c.1142A>C, c.1143C>G (leading to Asn381Thr/Lys respectively), c.1250G>T (Trp417Leu), c.1267T>C, c.1268A>G (leading to Tyr423His/Cys) [NM_001146274.1].

The gene has a pLI of 0.99-1 gnomAD/ExAC while there is a region of missense constraint encompassing the HMG box domain (the latter is an evolutionary conserved region mediating interactions with DNA).

No phenotypic differences were observed among individuals with pLoF and missense SNVs, and haploinsufficiency is presumed to be the underlying mechanism.

There are no variant or other studies performed, nor any animal models discussed.

In supplementary table 2, the authors provide several references to previous large scale sequencing studies with brief/incomplete descriptions of individuals de novo TCF7L2 variants and neurodevelopmental disorder (ID/ASD - Iossifov, De Rubeis, Lelieveld, McRae/DDD study and many other Refs).

Heterozygous TCF7L2 variants are thought to confer susceptibility to type diabetes mellitus (MIM 125853). Individuals reported by Dias et al did not have endocrine abnormalities including DM. A study by Roychowdhury et al (2021 - PMID: 34265237) suggests that regulatory variants in TCF7L2 are associated with thoracic aneurysm.

There is no other associated phenotype (notably NDD) in OMIM.
G2P includes TCF7L2 in its DD panel (Disease : TC7L2-related DD, Confidence:confirmed, Monoallelic, LoF).
SysID includes this gene within the autism candidate genes and current primary ID genes.; to: Dias et al (2021 - PMID: 34003604) describe the phenotype of 11 unrelated individuals harboring de novo missense/truncating TCF7L2 variants.

Features included DD in childhood (motor delay in 8/11, speech delay in 11/11), intellectual abilities ranging from average cognitive functioning to mild/moderate ID (the latter observed in 5/11), myopia (6/11) , dysmorphic features, variable orthopedic findings, and neuropsychiatric comorbidities incl. ASD (4/11) / ADHD (4/11).

One additional (12th) individual was excluded from this summary due to concurrent diagnosis of hypoxic-ischemic injury.

TCF7L2 on 10q25 encodes transcription factor 7-like 2, a high mobility group (HMG) box-containing transcription factor. As the authors discuss, the protein mediates canonical Wnt signaling. Secreted Wnt proteins lead to release of beta-catenin (CTNNB1) which after translocation to the nucleus acts with DNA-binding factors incl. TCF7L2 to turn on Wnt-responsive target genes. As a result TCF7L2 acts with beta-catenin as a switch for transcriptional regulation. Multiple alternative spliced TCF7L2 transcripts mediate it's function and specificity of transcriptional repertoire in a variety of tissues and contexts.

Dias et al provide references for its role in nervous system development incl. neurogenesis and thalamic development.

Variants in all cases occurred as de novo events with pLoF (stopgain, frameshift, splicing) ones predicted to lead to NMD. Missense variants occurred in all cases in or adjacent to the HMG box domain [aa 350-417]. 5 different missense variants affecting 3 residues were reported incl. c.1142A>C, c.1143C>G (leading to Asn381Thr/Lys respectively), c.1250G>T (Trp417Leu), c.1267T>C, c.1268A>G (leading to Tyr423His/Cys) [NM_001146274.1].

The gene has a pLI of 0.99-1 gnomAD/ExAC while there is a region of missense constraint encompassing the HMG box domain (the latter is an evolutionary conserved region mediating interactions with DNA).

No phenotypic differences were observed among individuals with pLoF and missense SNVs, and haploinsufficiency is presumed to be the underlying mechanism.

There are no variant or other studies performed, nor any animal models discussed.

In supplementary table 2, the authors provide several references to previous large scale sequencing studies with brief/incomplete descriptions of individuals de novo TCF7L2 variants and neurodevelopmental disorder (ID/ASD - Iossifov, De Rubeis, Lelieveld, McRae/DDD study and many other Refs).

Heterozygous TCF7L2 variants are thought to confer susceptibility to type diabetes mellitus (MIM 125853). Individuals reported by Dias et al did not have endocrine abnormalities including DM. A study by Roychowdhury et al (2021 - PMID: 34265237) suggests that regulatory variants in TCF7L2 are associated with thoracic aneurysm.

There is no other associated phenotype (notably NDD) in OMIM.
G2P includes TCF7L2 in its DD panel (Disease : TC7L2-related DD, Confidence:confirmed, Monoallelic, LoF).
SysID includes this gene within the autism candidate genes and current primary ID genes.
Mendeliome v0.8736 PIDD1 Zornitza Stark gene: PIDD1 was added
gene: PIDD1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: PIDD1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIDD1 were set to 28397838; 29302074; 33414379; 34163010
Phenotypes for gene: PIDD1 were set to Global developmental delay; Intellectual disability; Seizures; Autism; Behavioral abnormality; Psychosis; Pachygyria; Lissencephaly; Abnormality of the corpus callosum
Review for gene: PIDD1 was set to GREEN
Added comment: There is enough evidence to include this gene in the current panel with green rating.

Biallelic PIDD1 pathogenic variants have been reported in 26 individuals (11 families) with DD (all), variable degrees of ID (mild to severe), behavioral (eg. aggression/self-mutilation in several, ADHD) and/or psychiatric abnormalities (ASD, psychosis in 5 belonging to 3 families), well-controlled epilepsy is some (9 subjects from 6 families) and MRI abnormalities notably abnormal gyration pattern (pachygyria with predominant anterior gradient) as well as corpus callosum anomalies (commonly thinning) in several. Dysmorphic features have been reported in almost all, although there has been no specific feature suggested.

The first reports on the phenotype associated with biallelic PIDD1 mutations were made by Harripaul et al (2018 - PMID: 28397838) and Hu et al (2019 - PMID: 29302074) [both studies investigating large cohorts of individuals with ID from consanguineous families].

Sheikh et al (2021 - PMID: 33414379) provided details on the phenotype of 15 individuals from 5 families including those from the previous 2 reports and studied provided evidence on the role of PIDD1 and the effect of variants.

Zaki et al (2021 - PMID: 34163010) reported 11 additional individuals from 6 consanguineous families, summarize the features of all subjects published in the literature and review the neuroradiological features of the disorder.

PIDD1 encodes p53-induced death domain protein 1. The protein is part of the PIDDosome, a multiprotein complex also composed of the bipartite linker protein CRADD (also known as RAIDD) and the proform of caspase-2 and induces apoptosis in response to DNA damage.

There are 5 potential PIDD1 mRNA transcript variants with NM_145886.4 corresponding to the longest. Similar to the protein encoded by CRADD, PIDD1 contains a death domain (DD - aa 774-893). Constitutive post-translational processing gives PIDD1-N, PIDD1-C the latter further processed into PIDD1-CC (by auto-cleavage). Serine residues at pos. 446 and 588 are involved in this autoprocessing generating PIDD1-C (aa 446-910) and PIDD1-CC (aa 774-893). The latter is needed for caspase-2 activation.

Most (if not all) individuals belonged to consanguineous families of different origins and harbored pLoF or missense variants.

Variants reported so far include : c.2587C>T; p.Gln863* / c.1909C>T ; p.Arg637* / c.2443C>T / p.Arg815Trp / c.2275-1G>A which upon trap assay was shown to lead to skipping of ex15 with direct splicing form exon14 to the terminal exon 16 (resulting to p.Arg759Glyfs*1 with exlcusion of the entire DD) / c.2584C>T; p.Arg862Trp / c.1340G>A; p.Trp447* / c.2116_2120del; p.Val706His*, c.1564_1565del; p.Gly602fs*26

Evidence so far provided includes:
- Biallelic CRADD variants cause a NDD disorder and a highly similar gyration pattern.
- Confirmation of splicing effect (eg. for c.2275-1G>A premature stop in position 760) or poor expression (NM_145886.3:c.2587C>T; p.Gln863*). Arg815Trp did not affect autoprocessing or protein stability.
- Abnormal localization pattern, loss of interaction with CRADD and failure to activate caspase-2 (MDM2 cleavage assay) [p.Gln863* and Arg815Trp]
- Available expression data from GTEx (PIDD1 having broad expression in multiple tissues, but higher in brain cerebellum) as well as BrainSpan and PsychEncode studies suggesting high coexpression of PIDD1, CRADD and CASP2 in many regions in the developing human brain.
- Variants in other genes encoding proteins interacting with PIDD1 (MADD, FADD, DNAJ, etc) are associated with NDD.

Pidd-1 ko mice (ex3-15 removal) lack however CNS-related phenotypes. These show decreased anxiety but no motor anomalies. This has also been the case with Cradd-/- mice displaying no significant CNS phenotypes without lamination defects.

There is currently no associated phenotype in OMIM. PIDD1 is listed in the DD panel of G2P (PIDD1-related NDD / biallelic / loss of function / probable) . SysID includes PIDD1 among the current primary ID genes.
Sources: Expert Review
Mendeliome v0.8734 COLGALT1 Bryony Thompson gene: COLGALT1 was added
gene: COLGALT1 was added to Mendeliome. Sources: Other
Mode of inheritance for gene: COLGALT1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COLGALT1 were set to 30412317; 33709034; 31759980
Phenotypes for gene: COLGALT1 were set to Brain small vessel disease 3 MIM#618360
Review for gene: COLGALT1 was set to GREEN
Added comment: 3 unrelated cases with biallelic variants, and supporting functional assays. The main features of the cases were porencephalic cysts, leukoencephalopathy, lacunar infarcts, cerebral microbleeds/haemorrhages and calcifications. A null mouse model was embryonic lethal, but had defects in the vascular networks of the embryos.
Sources: Other
Mendeliome v0.8730 ARIH1 Bryony Thompson gene: ARIH1 was added
gene: ARIH1 was added to Mendeliome. Sources: Other
Mode of inheritance for gene: ARIH1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ARIH1 were set to 29689197; 32102558
Phenotypes for gene: ARIH1 were set to Thoracic aortic aneurysm
Review for gene: ARIH1 was set to GREEN
Added comment: 3 unrelated families: A de novo case (R171*) with thoracic aortic aneurysm (TAA), and 2 siblings with TAA and a missense (E15Q). Another proband with cerebrovascular aneurysm (family history of TAA) and a missense variant (E44G). Supporting functional assays of the variants and a drosophila model.
Sources: Other
Mendeliome v0.8709 UBR1 Zornitza Stark changed review comment from: >50 unrelated families reported, reviewed in PMID: 24599544.

Common clinical features include poor growth, mental retardation, and variable dysmorphic features, including aplasia or hypoplasia of the nasal alae, abnormal hair patterns or scalp defects, and oligodontia. Other features include hypothyroidism, sensorineural hearing loss, imperforate anus, and pancreatic exocrine insufficiency.; to: >50 unrelated families reported, reviewed in PMID: 24599544.

Common clinical features include poor growth, intellectual disability, and variable dysmorphic features, including aplasia or hypoplasia of the nasal alae, abnormal hair patterns or scalp defects, and oligodontia. Other features include hypothyroidism, sensorineural hearing loss, imperforate anus, and pancreatic exocrine insufficiency.
Mendeliome v0.8703 ACTL6A Zornitza Stark changed review comment from: Two individuals from unrelated families reported with missense variants in this gene. Part of the BAF complex. Only one confirmed de novo.; to: Two individuals from unrelated families reported with missense variants in this gene, and one with a splice-site variant. Part of the BAF complex. Only one missense confirmed de novo, pathogenicity of the other variant uncertain.
PMID 31994175: fourth individual reported, recurrent de novo p.Arg377Trp
Mendeliome v0.8696 CD19 Zornitza Stark changed review comment from: More than 5 unrelated families reported.; to: More than 5 unrelated families reported. Clinical features include increased susceptibility to infection, hypogammaglobulinaemia, and normal numbers of mature B cells in blood, indicating a B-cell antibody-deficient immunodeficiency disorder.
Mendeliome v0.8687 IPO8 Zornitza Stark Phenotypes for gene: IPO8 were changed from Loeys-Dietz syndrome-like; cardiovascular, neurologic, skeletal and immunologic abnormalities to Vascular aneurysm, immune dysregulation, skeletal anomalies, and skin and joint laxity, MIM# 619472; Loeys-Dietz syndrome-like; cardiovascular, neurologic, skeletal and immunologic abnormalities
Mendeliome v0.8686 IPO8 Zornitza Stark edited their review of gene: IPO8: Changed phenotypes: Vascular aneurysm, immune dysregulation, skeletal anomalies, and skin and joint laxity, MIM# 619472, Loeys-Dietz syndrome-like, cardiovascular, neurologic, skeletal and immunologic abnormalities
Mendeliome v0.8667 SF3B2 Zornitza Stark gene: SF3B2 was added
gene: SF3B2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SF3B2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SF3B2 were set to 34344887
Phenotypes for gene: SF3B2 were set to Craniofacial microsomia
Review for gene: SF3B2 was set to GREEN
Added comment: Twenty individuals from seven families reported with de novo or transmitted haploinsufficient variants in SF3B2. Affected individuals had mandibular hypoplasia, microtia, facial and preauricular tags, epibulbar dermoids, lateral oral clefts in addition to skeletal and cardiac abnormalities.

Targeted morpholino knockdown of SF3B2 in Xenopus resulted in disruption of cranial neural crest precursor formation and subsequent craniofacial cartilage defects, supporting a link between spliceosome mutations and impaired neural crest development in congenital craniofacial disease.

The families were ascertained from a cohort and the authors suggest that haploinsufficient variants in SF3B2 are the most prevalent genetic cause of CFM, explaining ~3% of sporadic and ~25% of familial cases.
Sources: Literature
Mendeliome v0.8657 ACAN Zornitza Stark edited their review of gene: ACAN: Added comment: Patients with SSOAD exhibit a broad phenotypic spectrum involving short stature associated with advanced bone maturation and early-onset osteoarthritis (OA), as well as mild dysmorphic features consisting of midface hypoplasia, brachydactyly, broad great toes, and lumbar lordosis. Other features include intervertebral disc disease and osteochondritis dissecans, which is characterized by separation of articular cartilage and subchondral bone from the articular surface. Phenotypes are highly variable even among patients within the same family, and there are no apparent genotype-phenotype correlations.

Well established gene-disease association, multiple families reported.

Note fewer families reported with bi-allelic variants in this gene and extreme short stature.; Changed publications: 24762113, 27870580, 19110214, 30124491, 28331218, 20137779; Changed phenotypes: Short stature and advanced bone age, with or without early-onset osteoarthritis and/or osteochondritis dissecans, OMIM# 165800, Spondyloepimetaphyseal dysplasia, aggrecan type 612813
Mendeliome v0.8641 LRBA Zornitza Stark Phenotypes for gene: LRBA were changed from to Immunodeficiency, common variable, 8, with autoimmunity MIM# 614700; Normal-decreased CD4 numbers; T cell dysregulation; Low-normal B cells; Reduced IgG and IgA; Recurrent infections; chronic diarrhoea; inflammatory bowel disease; hypogammaglobulinaemia; pneumonitis; autoimmune disorders; thrombocytopaenia
Mendeliome v0.8638 LRBA Zornitza Stark reviewed gene: LRBA: Rating: GREEN; Mode of pathogenicity: None; Publications: 22608502, 22721650, 25468195, 26206937, 33155142; Phenotypes: Immunodeficiency, common variable, 8, with autoimmunity MIM# 614700, Normal-decreased CD4 numbers, T cell dysregulation, Low-normal B cells, Reduced IgG and IgA, Recurrent infections, chronic diarrhoea, inflammatory bowel disease, hypogammaglobulinaemia, pneumonitis, autoimmune disorders, thrombocytopaenia; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8632 GIMAP5 Zornitza Stark gene: GIMAP5 was added
gene: GIMAP5 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: GIMAP5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GIMAP5 were set to 33956074
Phenotypes for gene: GIMAP5 were set to Portal hypertension, noncirrhotic, 2, MIM# 619463
Review for gene: GIMAP5 was set to GREEN
Added comment: 8 individuals from 4 unrelated families reported with onset of disease in the first decade of life. Clinical features included jaundice, hyperbilirubinaemia, pancytopaenia, including neutropaenia, lymphopaenia, and thrombocytopaenia, hepatosplenomegaly, and oesophageal varices. Some individuals had recurrent infections or features suggestive of an immunodeficiency. Liver biopsy was notable for the absence of cirrhosis and the presence of nodular regeneration.
Sources: Expert list
Mendeliome v0.8614 MALT1 Danielle Ariti edited their review of gene: MALT1: Added comment: 5 individuals from 3 unrelated families with immunodeficiency phenotype have reported variants in MALT1; two MALT1-knockout mouse models displaying primary T- and B-cell lymphocyte deficiency.

Variants identified were homozygous missense variants resulting in the alteration of highly conserved residue domains.

All individuals reported onset in infancy of recurrent bacterial/ fungal/ viral infections leading to bronchiectasis and poor T-cell proliferation.; Changed rating: GREEN
Mendeliome v0.8606 VRK1 Zornitza Stark changed review comment from: Complex phenotype with mixed peripheral and central neurological features. Two families reported where PCH was prominent and accompanied by ataxia. At least three families also reported where peripheral neuropathy dominated the clinical picture without PCH/ataxia.; to: Complex phenotype with mixed peripheral and central neurological features. Two families reported where PCH was prominent and accompanied by ataxia. At least three families also reported where peripheral neuropathy dominated the clinical picture without PCH/ataxia.

Further delineation of phenotype 2021:
PMID 34169149: expanding spectrum of neurologic disorders associated with VRK1. Two Hispanic individuals, one homozygous (R321C: VUS and LP/P in ClinVar) and one cHet (R321C+V236M, latter P and more recently VUS in ClinVar), with slowly progressive weakness and a clinical syndrome consistent with adult-onset spinal muscular atrophy WITHOUT pontocerebellar atrophy. No hom in gnomAD and both have been reported in cHet individuals with other features: R321C in association with adult-onset amyotrophic lateral sclerosis and V236M with rapidly progressive sensorimotor polyneuropathy and microcephaly. Authors suggest PMID 26583493 and 31837156 have similar reports. PMID 26583493 reports a 32yo Hispanic individual, cHet H119R+R321C, with early-onset amyotrophic lateral sclerosis, 5 years progressive weakness. PMID 31837156 reports two patients with adult-onset length-dependent motor neuropathy from unrelated consanguineous families of Moroccan Jewish descent, both hom for R387H.
Mendeliome v0.8601 CLCN3 Kristin Rigbye gene: CLCN3 was added
gene: CLCN3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CLCN3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: CLCN3 were set to PMID: 34186028
Phenotypes for gene: CLCN3 were set to Neurodevelopmental disorder
Mode of pathogenicity for gene: CLCN3 was set to Other
Review for gene: CLCN3 was set to GREEN
Added comment: 11 individuals reported, 9 that carried 8 different rare heterozygous missense variants in CLCN3, and 2 siblings that were homozygous for an NMD-predicted frameshift variant likely abolishing ClC-3 function. All missense variants were confirmed to be de novo in eight individuals for whom parental data was available.

The 11 individuals in the cohort share clinical features of variable severity. All 11 have GDD or ID and dysmorphic features, and a majority has mood or behavioural disorders and structural brain abnormalities:
- Structural brain abnormalities on MRI (9/11) included partial or full agenesis of the corpus callosum (6/9), disorganized cerebellar folia (4/9), delayed myelination (3/9), decreased white matter volume (3/9), pons hypoplasia (3/9), and dysmorphic dentate nuclei (3/9). Six of those with brain abnormalities also presented with seizures.
- Nine have abnormal vision, including strabismus in four and inability to fix or follow in the two with homozygous loss-of-function variants.
- Hypotonia ranging from mild to severe was reported in 7 of the 11 individuals.
- Six have mood or behavioural disorders, particularly anxiety (3/6).
- Consistent dysmorphic facial features included microcephaly, prominent forehead, hypertelorism, down-slanting palpebral fissures, full cheeks, and micrognathia.

The severity of disease in the two siblings with homozygous disruption of ClC-3 is consistent with the drastic phenotype seen in Clcn3 KO mice. The disease was more severe in two siblings carrying homozygous loss-of-function variants with the presence of GDD, absent speech, seizures, and salt and pepper fundal pigmentation in both individuals, with one deceased at 14 months of age. The siblings also had significant neuroanatomical findings including diffusely decreased white matter volume, thin corpora callosa, small hippocampi, and disorganized cerebellar folia. Supporting biallelic inheritance for LoF variants, disruption of mouse Clcn3 results in drastic neurodegeneration with loss of the hippocampus a few months after birth and early retinal degeneration. Clcn3−/− mice display severe neurodegeneration, whereas heterozygous Clcn3+/− mice appear normal.

Patch-clamp studies were used to investigate four of the missense variants. These suggested a gain of function in two variants with increased current in HEK cells, however they also showed reduced rectification of voltage and a loss of transient current, plus decreased current amplitude, glycosylation and surface expression when expressed in oocytes, and were suspected to interfere with channel gating and a negative feedback mechanism. These effects were also shown to vary depending on pH levels. The current of the remaining two variants did not differ from WT. For heterozygous missense variants, the disruption induced may be at least partially conferred to mutant/WT homodimers and mutant/ClC-4 heterodimers.

Both loss and gain of function in this gene resulted in the same phenotype.
Sources: Literature
Mendeliome v0.8601 TNPO2 Elena Savva gene: TNPO2 was added
gene: TNPO2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TNPO2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: TNPO2 were set to PMID: 34314705
Phenotypes for gene: TNPO2 were set to Developmental delays, neurologic deficits and dysmorphic features
Mode of pathogenicity for gene: TNPO2 was set to Other
Review for gene: TNPO2 was set to GREEN
Added comment: PMID: 34314705 - all de novo missense variants with intellectual disability (9/9), speech impairment (15/15), motor impairment (15/15), ophthalmologic abnormalities (10/15), muscle tone abnormalities (11/15, primarily hypotonia), seizures (6/15, febrile to non-febrile), microcephaly (5/15) and MRI anomalies (7/13, 3/13 had cerebellar hypoplasia/dysplasia).

Null fly model was homozygous lethal, no obvious phenotypes in heterozygotes. Upregulated gene expression also resulted in lethality. Overexpression of some human variants in fly models resulted in "toxicity" and phenotypic defects, authors speculate two variants are GOF, 1 variant is LOF.

gnomAD: minimal PTCs present
Sources: Literature
Mendeliome v0.8600 AP1G1 Danielle Ariti gene: AP1G1 was added
gene: AP1G1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: AP1G1 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: AP1G1 were set to 34102099
Phenotypes for gene: AP1G1 were set to Neurodevelopmental disorder (NDD); Intellectual Disability; Epilepsy
Mode of pathogenicity for gene: AP1G1 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments
Review for gene: AP1G1 was set to GREEN
Added comment: Two bi-allelic homozygous missense variants were found in two distinct families with Italian and Pakistani origins; homozygous missense variants.

Eight de novo heterozygous variants were identified in nine isolated affected individuals from nine families; including five missense, two frameshift, and one intronic variant that disrupts the canonical splice acceptor site.

Knocking out AP1G1 Zebrafish model resulted in severe developmental abnormalities and increased lethality.

All individuals had neurodevelopmental disorder (NDD) including global developmental delay and ID, which varied in severity from mild to severe.
Sources: Literature
Mendeliome v0.8598 SPTBN1 Belinda Chong changed review comment from: PMID: 34211179
- Heterozygous SPTBN1 variants in 29 individuals with developmental, language and motor delays; mild to severe intellectual disability; autistic features; seizures; behavioral and movement abnormalities; hypotonia; and variable dysmorphic facial features.
- Show that these SPTBN1 variants lead to effects that affect βII-spectrin stability, disrupt binding to key molecular partners, and disturb cytoskeleton organization and dynamics.

PMID: 33847457
- Common features include global developmental delays, intellectual disability, and behavioral disturbances. Autistic features (4/6) and epilepsy (2/7) or abnormal electroencephalogram without overt seizures (1/7) were present in a subset.
- identified seven unrelated individuals with heterozygous SPTBN1 variants: two with de novo missense variants and five with predicted loss-of-function variants (found to be de novo in two, while one was inherited from a mother with a history of learning disabilities).
- Identification of loss-of-function variants suggests a haploinsufficiency mechanism, but additional functional studies are required to fully elucidate disease pathogenesis.
Sources: Literature; to: PMID: 34211179
- Heterozygous SPTBN1 variants in 29 individuals with developmental, language and motor delays; mild to severe intellectual disability; autistic features; seizures (9/29); behavioral and movement abnormalities; hypotonia; and variable dysmorphic facial features.
- Show that these SPTBN1 variants lead to effects that affect βII-spectrin stability, disrupt binding to key molecular partners, and disturb cytoskeleton organization and dynamics.

PMID: 33847457
- Common features include global developmental delays, intellectual disability, and behavioral disturbances. Autistic features (4/6) and epilepsy (2/7) or abnormal electroencephalogram without overt seizures (1/7) were present in a subset.
- identified seven unrelated individuals with heterozygous SPTBN1 variants: two with de novo missense variants and five with predicted loss-of-function variants (found to be de novo in two, while one was inherited from a mother with a history of learning disabilities).
- Identification of loss-of-function variants suggests a haploinsufficiency mechanism, but additional functional studies are required to fully elucidate disease pathogenesis.
Sources: Literature
Mendeliome v0.8592 EDEM3 Seb Lunke Phenotypes for gene: EDEM3 were changed from EDEM3-congenital disorder of glycosylation to Congenital disorder of glycosylation; Developmental delay
Mendeliome v0.8591 UBA2 Ain Roesley changed review comment from: 2x unrelated probands with isolated split hand malformation. fs variants - 1x de novo and 1x inherited from apparent unaffected mother (no radiographs of her hand available)

1x proband with unilateral split-hand malformation. Her daughter and grandson reported to have ectrofactyly but were unavailable for testing; to: 2x unrelated probands with isolated split hand malformation. fs variants - 1x de novo and 1x inherited from apparent unaffected mother (no radiographs of her hand available)

1x proband with unilateral split-hand malformation (missense). Her daughter and grandson reported to have ectrofactyly but were unavailable for testing
Mendeliome v0.8586 TP73 Ee Ming Wong changed review comment from: - Seven individuals from five unrelated families homozygous for TP73 variants (includes 1x large deletion, 1x splice variant, 1x frameshift and 2x nonsense variants)
- Epithelial cells from TP73 variant carriers showed reduced number of ciliated cells and shortened cilia resulting in abnormal ciliary clearance of the airways compared to healthy controls; to: - Seven individuals from five unrelated families homozygous for TP73 variants (includes 1x large deletion, 1x splice variant, 1x frameshift and 2x nonsense variants)
- In vitro ciliogenesis experiments demonstrated that epithelial cells from TP73 variant carriers had reduced number of ciliated cells and shortened cilia resulting in abnormal ciliary clearance of the airways compared to healthy controls
Mendeliome v0.8586 HMGB1 Ain Roesley changed review comment from: 1x de novo fs, no functional studies done but cited Itou 2011 - mouse and zebrafish studies demonstrated the role of HMGB1 in regulating digit number during embryonic limb development
Sources: Literature; to: 1x de novo fs in a proband with severe mirror image foot polydactyly. No functional studies done but cited Itou 2011 - mouse and zebrafish studies demonstrated the role of HMGB1 in regulating digit number during embryonic limb development
Sources: Literature
Mendeliome v0.8586 HMGB1 Ain Roesley gene: HMGB1 was added
gene: HMGB1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: HMGB1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: HMGB1 were set to 34159400
Phenotypes for gene: HMGB1 were set to Mirror image foot polydactyly
Penetrance for gene: HMGB1 were set to unknown
Review for gene: HMGB1 was set to RED
Added comment: 1x de novo fs, no functional studies done but cited Itou 2011 - mouse and zebrafish studies demonstrated the role of HMGB1 in regulating digit number during embryonic limb development
Sources: Literature
Mendeliome v0.8586 SPTBN1 Belinda Chong gene: SPTBN1 was added
gene: SPTBN1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SPTBN1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: SPTBN1 were set to PMID: 34211179; PMID: 33847457
Phenotypes for gene: SPTBN1 were set to Neurodevelopmental Syndrome
Review for gene: SPTBN1 was set to GREEN
Added comment: PMID: 34211179
- Heterozygous SPTBN1 variants in 29 individuals with developmental, language and motor delays; mild to severe intellectual disability; autistic features; seizures; behavioral and movement abnormalities; hypotonia; and variable dysmorphic facial features.
- Show that these SPTBN1 variants lead to effects that affect βII-spectrin stability, disrupt binding to key molecular partners, and disturb cytoskeleton organization and dynamics.

PMID: 33847457
- Common features include global developmental delays, intellectual disability, and behavioral disturbances. Autistic features (4/6) and epilepsy (2/7) or abnormal electroencephalogram without overt seizures (1/7) were present in a subset.
- identified seven unrelated individuals with heterozygous SPTBN1 variants: two with de novo missense variants and five with predicted loss-of-function variants (found to be de novo in two, while one was inherited from a mother with a history of learning disabilities).
- Identification of loss-of-function variants suggests a haploinsufficiency mechanism, but additional functional studies are required to fully elucidate disease pathogenesis.
Sources: Literature
Mendeliome v0.8586 UBA2 Ain Roesley reviewed gene: UBA2: Rating: GREEN; Mode of pathogenicity: None; Publications: 34159400; Phenotypes: isolated split hand malformation; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.8586 EDEM3 Michelle Torres gene: EDEM3 was added
gene: EDEM3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EDEM3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EDEM3 were set to 34143952
Phenotypes for gene: EDEM3 were set to EDEM3-congenital disorder of glycosylation
Review for gene: EDEM3 was set to GREEN
Added comment: PMID: 34143952: 7 families (11 individuals) with 6x PTV and 2x missense variants with neurodevelopmental delay and variable facial dysmorphisms. The unaffected parents were all heterozygous carriers. Functional show LoF of EDEM3 enzymatic activity.
Sources: Literature
Mendeliome v0.8585 ANK2 Zornitza Stark gene: ANK2 was added
gene: ANK2 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: ANK2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ANK2 were set to 31983240; 22542183; 25363768; 27479843; 28554332; 30564305; 30755392; 31981491; 33004838; 33057194
Phenotypes for gene: ANK2 were set to Long QT syndrome 4, MIM# 600919; Complex neurodevelopmental disorder, MONDO:0100038
Review for gene: ANK2 was set to GREEN
Added comment: Link with cardiac abnormalities such as LongQT is DISPUTED. More than 10 unrelated individuals reported with neurodevelopmental phenotype, comprising autism/ID and de novo truncating variants, in addition to many other individuals as part of large NDD cohorts. This association has been assessed as DEFINITIVE by ClinGen.
Sources: Expert Review
Mendeliome v0.8583 PRDX3 Hazel Phillimore changed review comment from: Biallelic variants in 5 unrelated families with early onset (median 21 years , range 13-22 years) with ataxia with variable additional hyper- and hypokinetic movement disorders, and severe early-onset cerebellar atrophy (seen on MRI), and involvement of the brainstem, medullary olive and parietal cortex.
Evolution of the disease was gait ataxia leading to upper limb ataxia, then dysarthria and then dysphagia, all within a decade. For some of these patients, the phenotype included myoclonus, dystonia and / or tremor. Mild classical mitochondrial features were seen in one of the patients, namely ptosis and COX-negative fibres.
The variants were homozygous nonsense, homozygous frameshift, homozygous missense, and a compound heterozygote of a splice variant and missense, all leading to complete loss of the protein. Oxidative stress and mitochondrial dysfunction was indicated as the disease mechanism.
The families originated from Germany, France, India and two from eastern Turkey. The two families from Turkey were seemingly unrelated to each other but had the same homozygous missense.
Patient fibroblasts from each of the five probands showed lack of protein (via Western blot) and decreased glutathione peroxidase activity and decreased mitochondrial maximal respiratory capacity.
PRXD3 encodes peroxiredoxin 3, a mitochondrial antioxidant protein, that catalyses the reduction of hydrogen peroxide. It localises in the mitochondria, where most hydrogen peroxide is generated.
Functional studies: PRDX3 knockdown (induced by silencing RNA against PRDX3) in cerebellar medulloblastoma cells showed significantly decreased cell viability, increased hydrogen peroxide levels and increased susceptibility to apoptosis triggered by reactive oxygen species.
In addition, induced knockdown drosophila (in vivo animal model) had aberrant locomotor phenotypes and reduced lifespans, while immunolabelling of the brain showed increased cell death after exposure to oxidative stress.
Sources: Literature; to: Biallelic variants in 5 unrelated families with early onset (median 21 years , range 13-22 years) with ataxia with variable additional hyper- and hypokinetic movement disorders, and severe early-onset cerebellar atrophy (seen on MRI), and involvement of the brainstem, medullary olive and parietal cortex.
Evolution of the disease was gait ataxia leading to upper limb ataxia, then dysarthria and then dysphagia, all within a decade. For some of these patients, the phenotype included myoclonus, dystonia and / or tremor. Mild classical mitochondrial features were seen in one of the patients, namely ptosis and COX-negative fibres.
The variants were homozygous nonsense, homozygous frameshift, homozygous missense, and a compound heterozygote with a splice variant and missense, all leading to complete loss of the protein. Oxidative stress and mitochondrial dysfunction was indicated as the disease mechanism.
The families originated from Germany, France, India and two from eastern Turkey. The two families from Turkey were seemingly unrelated to each other but had the same homozygous missense.
Patient fibroblasts from each of the five probands showed lack of protein (via Western blot) and decreased glutathione peroxidase activity and decreased mitochondrial maximal respiratory capacity.
PRDX3 encodes peroxiredoxin 3, a mitochondrial antioxidant protein, that catalyses the reduction of hydrogen peroxide. It localises in the mitochondria, where most hydrogen peroxide is generated.
Functional studies: PRDX3 knockdown (induced by silencing RNA against PRDX3) in cerebellar medulloblastoma cells showed significantly decreased cell viability, increased hydrogen peroxide levels and increased susceptibility to apoptosis triggered by reactive oxygen species.
In addition, induced knockdown drosophila (in vivo animal model) had aberrant locomotor phenotypes and reduced lifespans, while immunolabelling of the brain showed increased cell death after exposure to oxidative stress.
Sources: Literature
Mendeliome v0.8583 PRDX3 Hazel Phillimore gene: PRDX3 was added
gene: PRDX3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRDX3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PRDX3 were set to PMID: 33889951
Phenotypes for gene: PRDX3 were set to cerebellar ataxia (early onset, mild to moderate, progressive)
Penetrance for gene: PRDX3 were set to unknown
Review for gene: PRDX3 was set to GREEN
Added comment: Biallelic variants in 5 unrelated families with early onset (median 21 years , range 13-22 years) with ataxia with variable additional hyper- and hypokinetic movement disorders, and severe early-onset cerebellar atrophy (seen on MRI), and involvement of the brainstem, medullary olive and parietal cortex.
Evolution of the disease was gait ataxia leading to upper limb ataxia, then dysarthria and then dysphagia, all within a decade. For some of these patients, the phenotype included myoclonus, dystonia and / or tremor. Mild classical mitochondrial features were seen in one of the patients, namely ptosis and COX-negative fibres.
The variants were homozygous nonsense, homozygous frameshift, homozygous missense, and a compound heterozygote of a splice variant and missense, all leading to complete loss of the protein. Oxidative stress and mitochondrial dysfunction was indicated as the disease mechanism.
The families originated from Germany, France, India and two from eastern Turkey. The two families from Turkey were seemingly unrelated to each other but had the same homozygous missense.
Patient fibroblasts from each of the five probands showed lack of protein (via Western blot) and decreased glutathione peroxidase activity and decreased mitochondrial maximal respiratory capacity.
PRXD3 encodes peroxiredoxin 3, a mitochondrial antioxidant protein, that catalyses the reduction of hydrogen peroxide. It localises in the mitochondria, where most hydrogen peroxide is generated.
Functional studies: PRDX3 knockdown (induced by silencing RNA against PRDX3) in cerebellar medulloblastoma cells showed significantly decreased cell viability, increased hydrogen peroxide levels and increased susceptibility to apoptosis triggered by reactive oxygen species.
In addition, induced knockdown drosophila (in vivo animal model) had aberrant locomotor phenotypes and reduced lifespans, while immunolabelling of the brain showed increased cell death after exposure to oxidative stress.
Sources: Literature
Mendeliome v0.8573 ERBB3 Zornitza Stark changed review comment from: PMID 33497358: 6 individuals from 4 unrelated families reported with severe gut dysmotility and neurodevelopmental disorder. Note variants in this gene have also recently been linked to Hirschsprung's disease.; to: PMID 33497358: 6 individuals from 4 unrelated families reported with severe gut dysmotility and other features of neurocristinopathy including short-segment HSCR, progressive axonal peripheral neuropathy, dysautonomia, hypopigmentation, deafness. Note variants in this gene have also recently been linked to Hirschsprung's disease.
Mendeliome v0.8571 ERBB3 Zornitza Stark edited their review of gene: ERBB3: Added comment: PMID 33497358: 6 individuals from 4 unrelated families reported with severe gut dysmotility and neurodevelopmental disorder. Note variants in this gene have also recently been linked to Hirschsprung's disease.; Changed rating: GREEN; Changed publications: 17701904, 31752936, 33497358; Changed phenotypes: Lethal congenital contractural syndrome 2, MIM# 607598, Neurodevelopmental disorder with gut dysmotility
Mendeliome v0.8570 PDCL3 Zornitza Stark gene: PDCL3 was added
gene: PDCL3 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: PDCL3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PDCL3 were set to 32621347
Phenotypes for gene: PDCL3 were set to Megacystis-microcolon
Review for gene: PDCL3 was set to AMBER
Added comment: Single publication (PMID 32621347): one family with two affected fetuses - one with megacystis and microcolon, and the other with megacystisis and bilateral diaphragmatic hernia (prune-belly phenotype). Compound het LOF variants in PDCL3 (one frameshift and one missense). Complete absence of PDLC3 expression demonstrated in one of the affected fetuses. No homozygous LOF PDCL3 variants in gnomAD. PCDL3 negatively modulates actin folding and is strongly expressed in smooth muscle of bladder and colon.
Sources: Expert Review
Mendeliome v0.8542 IKZF3 Zornitza Stark gene: IKZF3 was added
gene: IKZF3 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: IKZF3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IKZF3 were set to 34155405
Phenotypes for gene: IKZF3 were set to Immunodeficiency 84, MIM# 619437
Review for gene: IKZF3 was set to AMBER
Added comment: Single family reported where heterozygous missense variant in this gene segregated with immunodeficiency in a mother and two children. Findings included low levels of B cells and impaired early B-cell development, variable T-cell abnormalities, hypogammaglobulinaemia, increased susceptibility to infection with Epstein-Barr virus (EBV). One individual developed lymphoma in adulthood. Mouse model recapitulated phenotype.
Sources: Expert Review
Mendeliome v0.8538 LCK Zornitza Stark Phenotypes for gene: LCK were changed from to Immunodeficiency 22 MIM# 615758; Recurrent infections; Immune dysregulation; autoimmunity; Low CD4+; low CD8+; restricted T cell repertoire; poor TCR signaling; Normal IgG/IgA; high IgM; failure to thrive; diarrhoea; lymphopaenia; hypogammaglobulinaemia; anaemia; thrombocytopaenia; CD4+ T-cell lymphopaenia
Mendeliome v0.8533 LCK Zornitza Stark reviewed gene: LCK: Rating: AMBER; Mode of pathogenicity: None; Publications: 22985903, 1579166, 11021796; Phenotypes: Immunodeficiency 22 MIM# 615758, Recurrent infections, Immune dysregulation, autoimmunity, Low CD4+, low CD8+, restricted T cell repertoire, poor TCR signaling, Normal IgG/IgA, high IgM, failure to thrive, diarrhoea, lymphopenia, hypogammaglobulinemia, anaemia, thrombocytopaenia, CD4+ T-cell lymphopenia; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8527 DNMT3B Zornitza Stark Phenotypes for gene: DNMT3B were changed from to Immunodeficiency-centromeric instability-facial anomalies syndrome 1 MIM# 242860; facial dysmorphic features; flat nasal bridge; developmental delay; macroglossia; bacterial/opportunistic infections (recurrent); malabsorption; cytopaenia; malignancies; multiradial configurations of chromosomes 1, 9, 16; Hypogammaglobulinaemia; agammaglobulinaemia; variable antibody deficiency; decreased immunoglobulin production; low T/B/NK cells
Mendeliome v0.8524 DNMT3B Zornitza Stark reviewed gene: DNMT3B: Rating: GREEN; Mode of pathogenicity: None; Publications: 20587527, 10555141, 17359920, 9718351, 10647011, 11102980, 12239717; Phenotypes: Immunodeficiency-centromeric instability-facial anomalies syndrome 1 MIM# 242860, facial dysmorphic features, flat nasal bridge, developmental delay, macroglossia, bacterial/opportunistic infections (recurrent), malabsorption, cytopaenia, malignancies, multiradial configurations of chromosomes 1, 9, 16, Hypogammaglobulinaemia, agammaglobulinaemia, variable antibody deficiency, decreased immunoglobulin production, low T/B/NK cells; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8523 TMPO Bryony Thompson reviewed gene: TMPO: Rating: RED; Mode of pathogenicity: None; Publications: 16247757; Phenotypes: Hypertrophic cardiomyopathy, dilated cardiomyopathy; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.8522 SYNCRIP Zornitza Stark gene: SYNCRIP was added
gene: SYNCRIP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SYNCRIP was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SYNCRIP were set to 34157790; 30504930; 27479843; 23020937
Phenotypes for gene: SYNCRIP were set to Global developmental delay; Intellectual disability; Autism; Myoclonic atonic seizures; Abnormality of nervous system morphology
Review for gene: SYNCRIP was set to GREEN
Added comment: Semino et al (2021 - PMID: 34157790) provide clinical details on 3 unrelated individuals with de novo SYNCRIP variants and provide a review of 5 additional subjects previously identified within large cohorts in the literature and databases.

Features included DD, ID (7/7 for whom this information was available), ASD or autistic features (4/7). MRI abnormalities were observed in 3 (widening of CSF spaces, periventricular nodular heterotopia, prominent lat. ventricles). Epilepsy (myoclonic-astatic epilepsy / Doose syndrome) was reported for 2(/8) individuals.

The 3 patients here reported were identified following trio/singleton exome with Sanger confirmation of the variants and their de novo occurrence.

Variants are in almost all cases de novo (7/7 for whom this was known) and in 5/8 cases were pLoF, in 2/8 missense SNVs while a case from DECIPHER had a 77.92 kb whole gene deletion not involving other genes with unknown inheritance.

Overall the variants reported to date include [NM_006372.5]:
1 - c.858_859del p.(Gly287Leufs*5)
2 - c.854dupA p.(Asn285Lysfs*8)
3 - c.734T>C p.(Leu245Pro)
4 - chr6:85605276-85683190 deletion (GRCh38)
5 - c.629T>C p.(Phe210Ser)
6 - c.1573_1574delinsTT p.(Gln525Leu)
7 - c.1247_1250del p.(Arg416Lysfs*145)
8 - c.1518_1519insC p.(Ala507Argfs*14)

[P1-3: this report, P4: DECIPHER 254774, P5-6: Guo et al 2019 - PMID: 30504930, P7: Lelieveld et al 2016 - PMID: 27479843, P8: Rauch et al 2012 - PMID: 23020937 / all other Refs not here reviewed, clinical details summarized by Semino et al in table 1]

SYNCRIP (also known as HNRNPQ) encodes synaptotagmin‐binding cytoplasmic RNA‐interacting protein. As the authors note, this RNA-binding protein is involved in multiple pathways associated with neuronal/muscular developmental disorders. Several references are provided for its involvement in regulation of RNA metabolism, among others sequence recognition, pre-mRNA splicing, translation, transport and degradation.

Mutations in other RNA-interacting proteins and hnRNP members (e.g. HNRNPU, HNRNPD) are associated with NDD.

The missense variant (p.Leu245Pro) is within RRM2 one of the 3 RNA recognition motif (RRM) domains of the protein. These 3 domains, corresponding to the central part of the protein (aa 150-400), are relatively intolerant to variation (based on in silico predictions and/or variation in gnomAD). Leu245 localizes within an RNA binding pocket and in silico modeling suggests alteration of the tertiary structure and RNA-binding capacity of RRM2.

There are no additional studies performed.

Overall haploinsufficiency appears to be the underlying disease mechanism based on the truncating variants and the gene deletion. [pLI in gnomAD : 1, %HI : 2.48%]

Animal models are not discussed.

There is no associated phenotype in OMIM. This gene is included in the DD panel of G2P (monoallelic LoF variants / SYNCRIP-related developmental disorder). SysID also lists SYNCRIP within the current primary ID genes.
Sources: Literature
Mendeliome v0.8511 CAMK4 Zornitza Stark gene: CAMK4 was added
gene: CAMK4 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: CAMK4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CAMK4 were set to 30262571; 33098801; 33211350
Phenotypes for gene: CAMK4 were set to Intellectual disability; Autism; Behavioral abnormality; Abnormality of movement; Dystonia; Ataxia; Chorea; Myoclonus
Review for gene: CAMK4 was set to GREEN
Added comment: 3 publications by Zech et al (2018, 2020 - PMIDs : 30262571, 33098801, 33211350) provide clinical details on 3 individuals, each harboring a private de novo CAMK4 variant.

Overlapping features included DD, ID, behavoral issues, autism and abnormal hyperkinetic movements. Dystonia and chorea in all 3 appeared 3-20 years after initial symptoms.

CAMK4 encodes Calcium/Calmodulin-dependent protein kinase IV, an important mediator of calcium-mediated activity and dynamics, particularly in the brain. It is involved in neuronal transmission, synaptic plasticity, and neuronal gene expression required for brain development and neuronal homeostasis (summary by OMIM based on Zech et al, 2018).

The 473 aa enzyme has a protein kinase domain (aa 46-300) and a C-terminal autoregulatory domain (aa 305-341) the latter comprising an autoinhibitory domain (AID / aa 305-321) and a calmodulin-binding domain (CBD / aa 322-341) [NP_001735.1 / NM_001744.4 - also used below].

Variants in all 3 subjects were identified following trio-WES and were in all cases protein-truncating, mapping to exon 10 or exon 10-intron 10 junction, expected to escape NMD and cause selective abrogation of the autoinhibitory domain (aa 305-321) leading overall to gain-of-function.

Variation databases include pLoF CAMK4 variants albeit in all cases usptream or downstream of this region (pLI of this gene in gnomAD: 0.51). Variants leading to selective abrogation of the autoregulatory domain have not been reported.

Extensive evidence for the GoF effect of the variant has been provided in the first publication. Several previous studies have demonstrated that abrogation of the AID domain leads to consitutive activation (details below).

Mouse models - though corresponding to homozygous loss of function - support a role for CAMKIV in cognitive and motor symptoms. Null mice display tremulous and ataxic movements, deficiencies in balance and sensorimotor performance associated with reduced number of Purkinje neurons (Ribar et al 2000, PMID: 11069976 - not reviewed). Wei et al (2002, PMID: 12006982 - not reviewed) provided evidence for alteration in hippocampal physiology and memory function.

Heterozygous mutations in other genes for calcium/calmodulin-dependent protein kinases (CAMKs) e.g. CAMK2A/CAMK2B (encoding subunits of CAMKII) have been reported in individuals with ID.

---

The proband in the first publication (PMID: 30262571) was a male with DD, ID, behavioral difficulties (ASD, autoaggression, stereotypies) and hyperkinetic movement disorder (myoclonus, chorea, ataxia) with severe generalized dystonia (onset at the age of 13y). Brain MRI demonstrated cerebellar atrophy.

Extensive work-up incl. karyotyping, CMA, DYT-TOR1A, THAP1, GCH1, SCA1/2/3/6/7/8/12/17, Friedreich's ataxia and FMR1 analysis was negative.F

Trio WES identified a dn splice site variant (c.981+1G>A) in the last exon-intron junction. RT-PCR followed by gel electrophoresis and Sanger in fibroblasts from an affected and control subject revealed that the proband had - as predicted by the type/location of the variant - in equal amount 2 cDNA products, a normal as well as a truncated one.

Sequencing of the shortest revealed utilization of a cryptic donor splice site upstream of the mutated donor leading to a 77bp out-of-frame deletion and introduction of a premature stop codon in the last codon (p.Lys303Serfs*28). Western blot in fibroblast cell lines revealed 2 bands corresponding to the normal protein product as well as to the p.Lys303Serfs*28 although expression of the latter was lower than that of the full length protein.

Several previous studies have shown that mutant CAMKIV species that lack the autoinhibitory domain are consitutively active (several Refs provided). Among others Chatila et al (1996, PMID: 8702940) studied an in vitro-engineered truncation mutant (Δ1-317 - truncation at position 317 of the protein) with functionally validated gain-of-function effect.

To prove enhanced activity of the splicing variant, Zech et al assessed phosphorylation of CREB (cyclic AMP-responsive element binding protein), a downstream substrate of CAMKIV. Immunobloting revealed significant increase of CREB phosphorylation in patient fibroblasts compared to controls. Overactivation of CAMKIV signaling was reversed when cells were treated with STO-609 an inhibitor of CAMKK, the ustream activator of CAMKIV.

Overall the authors demonstrated that loss of CAMKIV autoregulatory domain due to this splice variant had a gain-of-function effect.

----

Following trio-WES, Zech et al (2020 - PMID: 33098801) identified another relevant subject within cohort of 764 individuals with dystonia. This 12-y.o. male, harboring a different variant affecting the same donor site (c.981+1G>T), presented DD, ID, dystonia (onset at 3y) and additional movement disorders (myoclonus, ataxia) as well as similar behavior (ASD, autoaggression, stereotypies). [Details in suppl. p20].

----

Finally Zech et al (2020 - PMID: 33211350) reported on a 24-y.o. woman with adolescence onset choreodystonia. Other features included DD, moderate ID, absence seizures in infancy, OCD with anxiety and later diagnosis of ASD. Trio WES revealed a dn stopgain variant (c.940C>T; p.Gln314*).
Sources: Expert Review
Mendeliome v0.8499 CSF3R Zornitza Stark changed review comment from: More than 5 unrelated families reported.; to: More than 5 unrelated families reported. Some reports of progression to myelodysplasia.
Mendeliome v0.8485 STX3 Zornitza Stark changed review comment from: At least 5 unrelated families reported.; to: At least 5 unrelated families reported.

STX3 isoform B (STX3B) predominates in the retina, so mutations in the STX3 gene that affect both isoform A (STX3A) and STX3B cause both retinal and gastrointestinal disease (RDMVID), whereas mutations in STX3 affecting only the STX3A transcript cause only diarrhoea.
Mendeliome v0.8449 ZNF148 Natalie Tan gene: ZNF148 was added
gene: ZNF148 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZNF148 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ZNF148 were set to PMID: 27964749
Phenotypes for gene: ZNF148 were set to Global developmental delay, absent or hypoplastic corpus callosum, and dysmorphic facies; MIM#617260
Review for gene: ZNF148 was set to GREEN
Added comment: Four unrelated individuals with de novo heterozygous nonsense or frameshift mutations (all resulting in premature termination codons in the last exon of ZNF148, predicted to escape nonsense-mediated mRNA decay and result in expression of a truncated protein). Phenotype characterised by underdevelopment of the corpus callosum, mild to moderate developmental delay and ID, variable microcephaly or mild macrocephaly, short stature, feeding problems, facial dysmorphisms, and cardiac and renal malformations. No functional studies to date.
Sources: Literature
Mendeliome v0.8449 RAC3 Natalie Tan gene: RAC3 was added
gene: RAC3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RAC3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RAC3 were set to PMID: 30293988; 29276006
Phenotypes for gene: RAC3 were set to Neurodevelopmental disorder with structural brain anomalies and dysmorphic facies, MIM#618577
Review for gene: RAC3 was set to GREEN
Added comment: Multiple unrelated individuals with heterozygous missense variants and a concordant phenotype (severe intellectual disability with brain malformations). No functional studies to date.
Sources: Literature
Mendeliome v0.8434 SUFU Zornitza Stark Phenotypes for gene: SUFU were changed from to Joubert syndrome 32, MIM#617757; SUFU-related neurodevelopmental syndrome; Basal cell nevus syndrome, MIM# 109400
Mendeliome v0.8431 SUFU Zornitza Stark edited their review of gene: SUFU: Changed phenotypes: Joubert syndrome 32, MIM#617757, SUFU-related neurodevelopmental syndrome, Basal cell nevus syndrome, MIM# 109400
Mendeliome v0.8431 SUFU Zornitza Stark changed review comment from: Two unrelated families described with what are postulated to be hypomorphic bi-allelic variants in this gene and Joubert syndrome. Note gene also causes dominant Basal Cell Nevus Syndrome.; to: Two unrelated families described with what are postulated to be hypomorphic bi-allelic variants in this gene and Joubert syndrome.
Mendeliome v0.8415 PMM2 Zornitza Stark Phenotypes for gene: PMM2 were changed from to Congenital disorder of glycosylation, type Ia (MIM#212065)
Mendeliome v0.8376 GDF1 Zornitza Stark edited their review of gene: GDF1: Added comment: PMID: 32144877 - founder PTC in Arab population causing congenital heart detects AND right isomerism in 3 (unrelated?) families. Reviews other publications and reports additional chet (two PTC) or homozygous (missense) families with situs inversus and/or heart defects. No apparent genotype-phenotype correlation btw dominant and recessive disease.; Changed rating: GREEN; Changed publications: 32144877; Changed phenotypes: Congenital heart defects, multiple types, 6 613854, Right atrial isomerism (Ivemark) 208530; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.8361 CRB2 Zornitza Stark changed review comment from: More than 7 unrelated families reported, mouse model. Some have presented predominantly with proteinuria, and some more with a multi-system ciliopathy phenotype, and yet others with RP.; to: VM with renal disease: More than 7 unrelated families reported, mouse model. Some have presented predominantly with proteinuria, and some more with a multi-system ciliopathy phenotype, and yet others with RP.

FSGS: at least 4 families and animal model.
Mendeliome v0.8335 LINGO4 Laura Raiti gene: LINGO4 was added
gene: LINGO4 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LINGO4 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LINGO4 were set to PMID: 33098801
Phenotypes for gene: LINGO4 were set to Developmental Delay, Intellectual disability, speech disorder
Review for gene: LINGO4 was set to GREEN
Added comment: 3 unrelated individuals
1 x individual compound heterozygous for 2x missense variants:
c.679C>A; c.1262G>A p.Leu227Met; p.Arg421Gln comp het. Phenotype: infancy-onset
generalized dystonia; DD/hypo, ID, speech disorder (isolated plus non-MD symptoms) NDD

1 x individual homozygous for missense variant: c.679C>A p.Leu227Met Phenotype: DD/hypo, ID, speech disorder

1 x individual homozygous for missense variant: c.1673G>A p.Ser558Asn Phenotype: DD/hypo, ID, speech disorder
Sources: Literature
Mendeliome v0.8335 ARFGEF3 Laura Raiti gene: ARFGEF3 was added
gene: ARFGEF3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ARFGEF3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ARFGEF3 were set to PMID: 33098801
Phenotypes for gene: ARFGEF3 were set to Dystonia
Review for gene: ARFGEF3 was set to GREEN
Added comment: 3 x unrelated individuals
1 x de novo missense variant: c.6212T>C p.Met2071Thr, phenotype: infancy-onset generalized dystonia (isolated)
1x stop-gain variant c.1773T>G p.Tyr591* (inherited from mosaic mother), phenotype: infancy-onset generalized dystonia (isolated)
1 x de novo missense variant (Gene Matcher) c.250A>C p.Met84Leu childhood-onset generalized dystonia (isolated)
Sources: Literature
Mendeliome v0.8335 IMPDH2 Laura Raiti gene: IMPDH2 was added
gene: IMPDH2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IMPDH2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IMPDH2 were set to PMID: 33098801
Phenotypes for gene: IMPDH2 were set to Dystonia
Review for gene: IMPDH2 was set to GREEN
Added comment: 6 unrelated individuals
1x individual in a dystonia cohort index case with infancy-onset dystonia and other neurological manifestations with a de-novo missense variant, c.338G>A (p.Gly113Glu) in IMPDH2, predicted to disrupt an invariant residue within the cystathionine-β-synthase (CBS) domain pair of the encoded protein.
IMPDH2 encodes IMPDH2, a key enzyme in the purine biosynthetic pathway, expressed throughout the brain and not linked previously to any human Mendelian condition.
1x individual with a de-novo substitution, c.337G>A (p.Gly113Arg), was found in in-house whole-exome sequencing data from 500 individuals with neurodevelopmental disorders. Through GeneMatcher, de novo variants identified:
3 x missense: c.729G>C (p.Gln243His), c.619G>C (p.Gly207Arg), and c.619G>A (p.Gly207Arg)
1 x deletion: c.478_480delTCC (p.Ser160del)
The six variants were predicted to be deleterious and none of them seen in control databases. All affected conserved amino acids and resided in and around the cystathionine-β-synthase domain pair.
The described variants are situated in and around the CBS domain pair, a regulatory element in which clustering of pathogenic missense variants has already been shown for the homologue of IMPDH2, IMPDH1.

The variant carriers shared similar neurodevelopmental phenotypes. Apart from the dystonia cohort index case, one participant had evidence of dystonic posturing. Modelling of the variants on 3D protein structures revealed spatial clustering near specific functional sites, predicted to result in deregulation of IMPDH2 activity. Additionally, thermal-shift assays showed that the c.619G>A (p.Gly207Arg) variant, identified as within the CBS domain pair, and c.729G>C (p.Gln243His), which is in close vicinity, affected the stability or folding behaviour of IMPDH2.
Sources: Literature
Mendeliome v0.8334 DYNC2H1 Zornitza Stark changed review comment from: More than 50 unrelated families reported.; to: More than 50 unrelated families reported with predominantly skeletal dysplasia.

Association with RP: - Five affected probands with homozygous and compound heterozygous missense and PTC variants - Associated with the NM_001080463.1 transcript (predominant isoform in retina from retinal organoid studies). PMID 32753734
Mendeliome v0.8326 AK2 Zornitza Stark changed review comment from: Well established gene-disease association.; to: Well established gene-disease association.

PMID: 19043417 (2009). 6 affected individuals from 5 unrelated families (3 of the families showed evidence of consanguinity). Homozygous (5 individuals) and compound heterozygous (1 individual) variants in the AK2 gene. Variants included missense, deletion and inframe indel, resulting in protein LoF. Available parents were sequenced and found heterozygous for the variants, supporting bi-allelic inheritance.

PMID: 19043416 (2009). 7 affected individuals from 6 unrelated families (2 separate consanguineous & 4 non-consanguineous families). Homozygous and compound heterozygous variants detected (missense, deletion, inframe indel), resulting in protein LoF. Reticular dysgenesis phenotype including Leukopenia, lymphopenia and agranulocytosis in all affected individuals and sensorineural deafness in 7 individuals.
Mendeliome v0.8318 ATG7 Zornitza Stark changed review comment from: 12 individuals from 5 unrelated families reported with a complex neurodevelopmental disorder and bi-allelic variants in this gene. Age range from 21 months to 71 years of age. Main clinical features included axial hypotonia, variably impaired intellectual development with poor or absent speech, and delayed walking (up to 7 years of age) or inability to walk. All had ataxia, often with tremor or dyskinesia, as well as dysarthria associated with cerebellar hypoplasia on brain imaging. Most had optic atrophy, and some had ptosis, chronic progressive external ophthalmoplegia, retinopathy, and strabismus; 1 had early-onset cataracts. The ore severely affected individuals had spastic paraplegia and inability to walk.

Functional data including mouse model.
Sources: Literature; to: 12 individuals from 5 unrelated families reported with a complex neurodevelopmental disorder and bi-allelic variants in this gene. Age range from 21 months to 71 years of age. Main clinical features included axial hypotonia, variably impaired intellectual development with poor or absent speech, and delayed walking (up to 7 years of age) or inability to walk. All had ataxia, often with tremor or dyskinesia, as well as dysarthria associated with cerebellar hypoplasia on brain imaging. Most had optic atrophy, and some had ptosis, chronic progressive external ophthalmoplegia, retinopathy, and strabismus; 1 had early-onset cataracts. The more severely affected individuals had spastic paraplegia and inability to walk.

Functional data including mouse model.
Sources: Literature
Mendeliome v0.8318 ATG7 Zornitza Stark changed review comment from: 12 individuals from 5 unrelated families reported with a complex neurodevelopmental disorder and bi-allelic variants in this gene. Age range from 21 months to 71 years of age. Main clinical features included axial hypotonia, variably impaired intellectual development with poor or absent speech, and delayed walking (up to 7 years of age) or inability to walk. All had ataxia, often with tremor or dyskinesia, as well as dysarthria associated with cerebellar hypoplasia on brain imaging. Most had optic atrophy, and some had ptosis, chronic progressive external ophthalmoplegia, retinopathy, and strabismus; 1 had early-onset cataracts. The ore severely affected individuals had spastic paraplegia and inability to walk.
Sources: Literature; to: 12 individuals from 5 unrelated families reported with a complex neurodevelopmental disorder and bi-allelic variants in this gene. Age range from 21 months to 71 years of age. Main clinical features included axial hypotonia, variably impaired intellectual development with poor or absent speech, and delayed walking (up to 7 years of age) or inability to walk. All had ataxia, often with tremor or dyskinesia, as well as dysarthria associated with cerebellar hypoplasia on brain imaging. Most had optic atrophy, and some had ptosis, chronic progressive external ophthalmoplegia, retinopathy, and strabismus; 1 had early-onset cataracts. The ore severely affected individuals had spastic paraplegia and inability to walk.

Functional data including mouse model.
Sources: Literature
Mendeliome v0.8317 ATG7 Zornitza Stark gene: ATG7 was added
gene: ATG7 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ATG7 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ATG7 were set to 34161705
Phenotypes for gene: ATG7 were set to Spinocerebellar ataxia, SCAR31, MIM#619422
Review for gene: ATG7 was set to GREEN
Added comment: 12 individuals from 5 unrelated families reported with a complex neurodevelopmental disorder and bi-allelic variants in this gene. Age range from 21 months to 71 years of age. Main clinical features included axial hypotonia, variably impaired intellectual development with poor or absent speech, and delayed walking (up to 7 years of age) or inability to walk. All had ataxia, often with tremor or dyskinesia, as well as dysarthria associated with cerebellar hypoplasia on brain imaging. Most had optic atrophy, and some had ptosis, chronic progressive external ophthalmoplegia, retinopathy, and strabismus; 1 had early-onset cataracts. The ore severely affected individuals had spastic paraplegia and inability to walk.
Sources: Literature
Mendeliome v0.8312 C2orf69 Zornitza Stark gene: C2orf69 was added
gene: C2orf69 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: C2orf69 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: C2orf69 were set to 34038740; 33945503
Phenotypes for gene: C2orf69 were set to Combined oxidative phosphorylation deficiency-53 (COXPD53), MIM#619423
Review for gene: C2orf69 was set to GREEN
Added comment: PMID 34038740: 20 affected children from 8 unrelated families reported, presenting with fatal syndrome consisting of severe autoinflammation and progredient leukoencephalopathy with recurrent seizures; 12 of these subjects, whose DNA was available, segregated homozygous loss-of-function C2orf69 variants. Endogenous C2ORF69 was found to be (1) loosely bound to mitochondria, (2) affects mitochondrial membrane potential and oxidative respiration in cultured neurons, and (3) controls the levels of the glycogen branching enzyme 1 (GBE1) consistent with a glycogen-storage-associated mitochondriopathy. Zebrafish model.

PMID 33945503: 8 individuals from 5 families reported with muscle hypotonia, developmental delay, progressive microcephaly, and brain MRI abnormalities. Age at onset ranged from birth to 6 months of age. Six patients had vision impairment, liver abnormalities, inflammation/inflammatory arthritis, and 5 patients had seizures.
Sources: Literature
Mendeliome v0.8308 FBXW7 Zornitza Stark Phenotypes for gene: FBXW7 were changed from FBXW7-related neurodevelopmental syndrome to FBXW7-related neurodevelopmental syndrome; Wilms tumour predisposition
Mendeliome v0.8305 YARS Zornitza Stark changed review comment from: More than 5 unrelated families reported.; to: Mono-allelic disease: More than 5 unrelated families reported.
Mendeliome v0.8292 RING1 Eleanor Williams gene: RING1 was added
gene: RING1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RING1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: RING1 were set to 29386386
Phenotypes for gene: RING1 were set to microcephaly; intellectual disability
Review for gene: RING1 was set to RED
Added comment: Not associated with any phenotype in OMIM.

PMID: 29386386 - Pierce et al 2018 - report a 13 yo female with a de novo RING1 p.R95Q variant and syndromic neurodevelopmental disabilities. Early motor and language development were normal but were delayed after the first year of life. Cognitive testing showed a verbal IQ of 55 and a visual performance IQ of 63. Head circumference at birth was -4.9 SD, and -4.2 SD at age 13 which falls into the severe microcephaly category. C. elegans with either the missense mutation or complete knockout of spat-3 (the suggested RING1 ortholog) were defective in monoubiquitylation of histone H2A and had defects in neuronal migration and axon guidance.
Sources: Literature
Mendeliome v0.8292 IRX5 Eleanor Williams changed review comment from: Associated with Hamamy syndrome #611174 (AR) in OMIM. Hamamy syndrome is characterised by craniofacial dysmorphism, hearing loss, skeletal anomalies, microcytic hypochromic anemia and congenital heart defects. Severe myopia has also been reported. Homozygous missense variants in IRX5 were reported in 2 families with this condition.

Cone dystrophy
-------------------
PMID: 33891002 - Khol et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.; to: Associated with Hamamy syndrome #611174 (AR) in OMIM. Hamamy syndrome is characterised by craniofacial dysmorphism, hearing loss, skeletal anomalies, microcytic hypochromic anemia and congenital heart defects. Severe myopia has also been reported. Homozygous missense variants in IRX5 were reported in 2 families with this condition (PMID: 22581230;17230486)

Duplication of gene
-------------------
PMID: 33891002 - Kohl et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.

Loss of function/gene
---------
PMID: 28041643 - Carss et al 2017 - screened a cohort of 722 individuals with inherited retinal disease using WES/WGS. 1 case reported with a biallelic deletion in IRX5 reported which leads to a frameshift ENST00000394636.4; c.1362_1366delTAAAG, p.Lys455ProfsTer19 in a patient with retinitis pigmentosa.

PMID: 32045705 - Apuzzo et al 2020 - report 2 cases of loss of a region in 16q12.1q21 which encompasses IRX5 and IRX6 and many other genes, which together with 3 other previous reports of deletions in this region help define a syndrome with features that include dysmorphic features, short stature, microcephaly, global developmental delay/intellectual disability, autism spectrum disorder (ASD) and ocular abnormalities (nystagmus and strabismus).
Mendeliome v0.8292 IRX6 Eleanor Williams changed review comment from: Not associated with any disorder in OMIM or Gene2Phenotype.

PMID: 33891002 - Khol et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.
Sources: Literature; to: Not associated with any disorder in OMIM or Gene2Phenotype.

PMID: 33891002 - Kohl et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.
Sources: Literature
Mendeliome v0.8289 HID1 Zornitza Stark gene: HID1 was added
gene: HID1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: HID1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: HID1 were set to 33999436
Phenotypes for gene: HID1 were set to Syndromic infantile encephalopathy; Hypopituitarism
Review for gene: HID1 was set to GREEN
Added comment: 7 individuals from 6 unrelated families reported. Clinical features included: hypopituitarism in combination with brain atrophy, thin corpus callosum, severe developmental delay, visual impairment, and epilepsy
Sources: Literature
Mendeliome v0.8277 MYT1 Zornitza Stark changed review comment from: Five unrelated individuals reported with variants in this gene and OAV spectrum.; to: Five unrelated individuals reported with variants in this gene and OAV spectrum.

Single individual reported with missense variant as part of an ID cohort, limited evidence for disease association.
Mendeliome v0.8269 ATP1A2 Zornitza Stark edited their review of gene: ATP1A2: Added comment: Association with alternating hemiplegia is well established.

PMID 31608932: Three individuals from two unrelated families reported with balleliic LoF variants in this gene and hydrops/congenital abnormalities. Mouse model is perinatal lethal.

PMID 33880529: six individuals with de novo missense variants reported and DD/EE/PMG.; Changed rating: GREEN; Changed publications: 31608932, 33880529; Changed phenotypes: Alternating hemiplegia of childhood 1, MIM#104290, Hydrops fetalis, microcephaly, arthrogryposis, extensive cortical malformations, Developmental and epileptic encephalopathy, polymicrogyria; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.8266 SAMD9L Zornitza Stark changed review comment from: At least three unrelated families reported, some postulate GoF whereas others postulate LoF as mechanism.; to: Ataxia-pancytopaenia: At least three unrelated families reported, some postulate GoF whereas others postulate LoF as mechanism.

ID: single individual reported, limited evidence of association.
Mendeliome v0.8264 IRX6 Eleanor Williams gene: IRX6 was added
gene: IRX6 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IRX6 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: IRX6 were set to 33891002
Phenotypes for gene: IRX6 were set to cone dystrophy, MONDO:0000455
Mode of pathogenicity for gene: IRX6 was set to Other
Review for gene: IRX6 was set to GREEN
Added comment: Not associated with any disorder in OMIM or Gene2Phenotype.

PMID: 33891002 - Khol et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.
Sources: Literature
Mendeliome v0.8263 EPHA7 Zornitza Stark gene: EPHA7 was added
gene: EPHA7 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: EPHA7 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: EPHA7 were set to 34176129
Phenotypes for gene: EPHA7 were set to Intellectual disability
Review for gene: EPHA7 was set to AMBER
Added comment: Lévy et al (2021 - PMID: 34176129) provide evidence that haploinssuficiency of EPHA7 results in a neurodevelopmental disorder.

The authors report on 12 individuals belonging to 9 unrelated families, all harboring with 6q microdeletions spanning EPHA7.

Overlapping features included DD (13/13), ID (10/10 - mild in most cases, individuals with larger CNVs/additional variants had more severe phenotype), speech delay and behavioral disorders. Variable other features incl. hypotonia (70%), non specific facial features, eye abnormalities (40%) and cardiac defects (25%).

The CNVs ranged from 152 kb to few Mb in size but in 4 subjects (P5-8) were only minimal, involving only EPHA7.

9 out of 12 individuals had inherited the deletion (5 subjects paternal, 4 maternal), in 1 subject (P12) this occured de novo, while for 2 others inheritance was not specified. Most deletions were inherited from an unaffected parent (in 6/7 families), with unclear contribution in a further one.

The authors discuss on previous studies suggesting an important role for EphA7 in brain development (modulation of cell-cell adhesion and repulsion, regulation of dendrite morphogenesis in early corticogenesis, role in dendritic spine formation later in development. EphA7 has also been proposed to drive neuronal maturation and synaptic function).

Haploinsufficiency for other ephrins or ephrin receptors has been implicated in other NDDs.

Overall Lévy et al promote incomplete penetrance and variable expressivity with haploinsufficiency of this gene being a risk factor for NDD. [The gene has also an %HI of 2.76% and a pLI of 1].
Sources: Expert Review
Mendeliome v0.8258 GRK2 Zornitza Stark gene: GRK2 was added
gene: GRK2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GRK2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GRK2 were set to 33200460
Phenotypes for gene: GRK2 were set to Jeune asphyxiating thoracic dystrophy (ATD)
Review for gene: GRK2 was set to AMBER
Added comment: Two unrelated families reported and some functional data.
Sources: Literature
Mendeliome v0.8229 ATP9A Arina Puzriakova gene: ATP9A was added
gene: ATP9A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ATP9A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ATP9A were set to http://dx.doi.org/10.1136/jmedgenet-2021-107843
Phenotypes for gene: ATP9A were set to Neurodevelopmental delay; Postnatal microcephaly; Failure to thrive; Gastrointestinal symptoms
Review for gene: ATP9A was set to AMBER
Added comment: Vogt et al. 2021 report on 3 individuals from 2 unrelated consanguineous families with different homozygous truncating variants in ATP9A, presenting with DD/ID of variable degree (2 mild, 1 severe), postnatal microcephaly (OFC range: −2.33 SD to −3.58 SD), failure to thrive, and gastrointestinal symptoms. Patient-derived fibroblasts showed reduced expression of ATP9A, and consistent with previous findings also overexpression of interacting partners, ARPC3 and SNX3.
Sources: Literature
Mendeliome v0.8229 ATP2C2 Eleanor Williams gene: ATP2C2 was added
gene: ATP2C2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ATP2C2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: ATP2C2 were set to 33864365; 28440294
Phenotypes for gene: ATP2C2 were set to language impairment, HP:0002463
Review for gene: ATP2C2 was set to RED
Added comment: PMID: 33864365 - Martinelli et al 2021 - report a family with a missense variant NM_001286527.2:c.304G>A, p.(Val102Met) in ATP2C2 in a father and two siblings with specific language impairment. However two other affected siblings did not have this variant. This variant was also reported by Chen et al. They found that the variant had a higher frequency in language cases (1.8%, N = 360) compared with cohorts selected for dyslexia (0.8%, N = 520) and ADHD (0.7%, N = 150), which presented frequencies comparable to reference databases (0.9%, N = 24 046 gnomAD controls). They postulate that variant is not sufficient on its own to cause a disorder but is a susceptibility factor which increases the risk for language impairment.

PMID: 28440294 - Chen et al 2017 - report 2 probands with severe learning impairment, and missense variants in ATP2C2 (NM_001286527: c.G304A:p.V102M and NM_001291454:exon21: c.C1936T:p.R646W).
Sources: Literature
Mendeliome v0.8217 TCTN3 Zornitza Stark changed review comment from: Rare cause of JBS, I can only find two families reported plus one with OFD. Ataxia specifically described in one of the JBS individuals.; to: Three unrelated families reported with JBTS phenotype. Variants in this gene are associated with other ciliopathies as well (OFD and Mohr-Majewski).
Mendeliome v0.8201 NUF2 Dean Phelan gene: NUF2 was added
gene: NUF2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NUF2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: NUF2 were set to PMID: 33721060
Phenotypes for gene: NUF2 were set to microcephaly; short stature; bilateral vocal cord paralysis; micrognathia; atrial septal defect
Review for gene: NUF2 was set to RED
Added comment: PMID: 33721060 - de novo missense variant identified in one male patient with microcephaly and short stature, with additional features, such as bilateral vocal cord paralysis, micrognathia and atrial septal defect.
Sources: Literature
Mendeliome v0.8201 HEATR5B Teresa Zhao gene: HEATR5B was added
gene: HEATR5B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: HEATR5B was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: HEATR5B were set to PMID: 33824466
Phenotypes for gene: HEATR5B were set to pontocerebellar hypoplasia
Review for gene: HEATR5B was set to AMBER
Added comment: Four affected children from two families presenting with pontocerebellar hypoplasiawith neonatal seizures, severe ID and motor delay.

Two homozygous splice variants were reported ((c.5051–1G>A and c.5050+4A>G) in intron 31 of HEATR5B gene. Aberrant splicing was found in patient fibroblasts, which correlated
with reduced levels of HEATR5B protein.

Homozygous knockout mice were not viable.

*NOTE: gene (and alias) not found in OMIM
Sources: Literature
Mendeliome v0.8189 IFT80 Zornitza Stark commented on gene: IFT80: 5 unrelated families reported.
Mendeliome v0.8186 TTC26 Zornitza Stark changed review comment from: Three unrelated families and functional data including zebrafish model.
Sources: Literature; to: Seven families and functional data including zebrafish model.
Sources: Literature
Mendeliome v0.8185 TTC26 Zornitza Stark gene: TTC26 was added
gene: TTC26 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TTC26 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TTC26 were set to 34177428; 32617964; 31595528; 24596149; 22718903
Phenotypes for gene: TTC26 were set to Ciliopathy Syndrome with Biliary, Renal, Neurological, and Skeletal Manifestations
Review for gene: TTC26 was set to GREEN
Added comment: Three unrelated families and functional data including zebrafish model.
Sources: Literature
Mendeliome v0.8177 ARHGEF9 Zornitza Stark Mode of inheritance for gene: ARHGEF9 was changed from X-LINKED: hemizygous mutation in males, biallelic mutations in females to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.8159 KCNJ16 Zornitza Stark gene: KCNJ16 was added
gene: KCNJ16 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KCNJ16 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: KCNJ16 were set to 33811157; 33840812
Phenotypes for gene: KCNJ16 were set to Renal tubulopathy; deafness
Review for gene: KCNJ16 was set to GREEN
Added comment: 8 unrelated families reported.
Sources: Literature
Mendeliome v0.8130 C21orf2 Zornitza Stark changed review comment from: Axial spondylometaphyseal dysplasia (SMDAX) is characterized by postnatal growth failure, including rhizomelic short stature in early childhood that evolves into short trunk in late childhood, and thoracic hypoplasia that may cause mild to moderate respiratory problems in the neonatal period and later susceptibility to airway infection. Impaired visual acuity comes to medical attention in early life and vision rapidly deteriorates. Retinal changes are diagnosed as retinitis pigmentosa or pigmentary retinal degeneration on funduscopic examination and as cone-rod dystrophy on ERG. Radiologic hallmarks include short ribs with flared and cupped anterior ends, mild spondylar dysplasia, lacy iliac crests, and metaphyseal irregularities essentially confined to the proximal femora. At least 7 unrelated families reported.

7 families also reported with isolated retinal dystrophy.; to: Axial spondylometaphyseal dysplasia (SMDAX) is characterized by postnatal growth failure, including rhizomelic short stature in early childhood that evolves into short trunk in late childhood, and thoracic hypoplasia that may cause mild to moderate respiratory problems in the neonatal period and later susceptibility to airway infection. Impaired visual acuity comes to medical attention in early life and vision rapidly deteriorates. Retinal changes are diagnosed as retinitis pigmentosa or pigmentary retinal degeneration on funduscopic examination and as cone-rod dystrophy on ERG. Radiologic hallmarks include short ribs with flared and cupped anterior ends, mild spondylar dysplasia, lacy iliac crests, and metaphyseal irregularities essentially confined to the proximal femora. At least 7 unrelated families reported.

7 families also reported with isolated retinal dystrophy.

New HGNC approved name is CFAP410.
Mendeliome v0.8097 SYK Zornitza Stark Phenotypes for gene: SYK were changed from Immune dysregulation and systemic inflammation to Immunodeficiency-82 with systemic inflammation (IMD82) , MIM#619381
Mendeliome v0.8079 POPDC3 Zornitza Stark changed review comment from: 5 affected individuals from 3 unrelated families reported, supportive animal model data.
Sources: Literature; to: 5 affected individuals from 3 unrelated families reported, supportive animal model data. Presentation was between adolescence and 40s with proximal muscle weakness primarily affecting the lower limbs, resulting in increased falls and difficulty running. The disorder was slowly progressive, with later involvement of the upper limbs. MRI showed fatty replacement of the thigh muscles and medial gastrocnemius, with some paraspinal muscles also affected. Some patients had calf hypertrophy. Serum CK was markedly elevated.
Sources: Literature
Mendeliome v0.8078 POPDC3 Zornitza Stark gene: POPDC3 was added
gene: POPDC3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: POPDC3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: POPDC3 were set to 31610034
Phenotypes for gene: POPDC3 were set to Muscular dystrophy, limb-girdle, autosomal recessive 26, MIM# 618848
Review for gene: POPDC3 was set to GREEN
Added comment: 5 affected individuals from 3 unrelated families reported, supportive animal model data.
Sources: Literature
Mendeliome v0.8065 PARN Zornitza Stark Phenotypes for gene: PARN were changed from to Dyskeratosis congenita, autosomal recessive 6, MIM# 616353; Pulmonary fibrosis and/or bone marrow failure, telomere-related, 4, MIM# 616371
Mendeliome v0.8062 PARN Zornitza Stark reviewed gene: PARN: Rating: GREEN; Mode of pathogenicity: None; Publications: 25893599, 26342108, 25848748; Phenotypes: Dyskeratosis congenita, autosomal recessive 6, MIM# 616353, Pulmonary fibrosis and/or bone marrow failure, telomere-related, 4, MIM# 616371; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.8053 NFS1 Zornitza Stark Phenotypes for gene: NFS1 were changed from Complex II/III deficiency; multisystem organ failure to Combined oxidative phosphorylation deficiency 52, MIM#619386; Complex II/III deficiency; multisystem organ failure
Mendeliome v0.8051 NFS1 Zornitza Stark edited their review of gene: NFS1: Changed phenotypes: Combined oxidative phosphorylation deficiency 52, MIM#619386, Complex II/III deficiency, multisystem organ failure
Mendeliome v0.8046 NBEAL2 Zornitza Stark Phenotypes for gene: NBEAL2 were changed from to Gray platelet syndrome, MIM# 139090
Mendeliome v0.8043 NBEAL2 Zornitza Stark reviewed gene: NBEAL2: Rating: GREEN; Mode of pathogenicity: None; Publications: 21765412, 21765411, 21765413; Phenotypes: Gray platelet syndrome, MIM# 139090; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8011 ADA2 Zornitza Stark commented on gene: ADA2: Vasculitis, autoinflammation, immunodeficiency, and haematologic defects syndrome (VAIHS) is an autosomal recessive multisystem disorder with onset in childhood. The phenotype is highly variable, but most patients have features of a systemic vascular inflammatory disorder with skin ulceration and recurrent strokes affecting the small vessels of the brain resulting in neurologic dysfunction. Other features may include recurrent fever, elevated acute-phase proteins, myalgias, lesions resembling polyarteritis nodosa, and/or livedo racemosa or reticularis with an inflammatory vasculitis on biopsy. Some patients may have renal and/or gastrointestinal involvement, hypertension, aneurysms, or ischemic necrosis of the digits. Some affected individuals have immunodeficiency. At least 10 unrelated families reported, the p.Gly47Arg variant is a common founder variant in the Jewish population.
Mendeliome v0.8009 IFT74 Zornitza Stark edited their review of gene: IFT74: Added comment: PMID 33531668: Identified IFT74 as a JBTS-associated gene in 3 unrelated families through WES. All the affected individuals carried truncated variants and shared one missense variant (p.Q179E) found only in East Asians. The expression of the human p.Q179E-IFT74 variant displayed compromised rescue effects in zebrafish ift74 morphants. Attenuated ciliogenesis; altered distribution of IFT proteins and ciliary membrane proteins, including ARL13B, INPP5E, and GPR161; and disrupted hedgehog signaling were observed in patient fibroblasts with IFT74 variants.; Changed publications: 27486776, 32144365, 33531668; Changed phenotypes: Bardet-Biedl syndrome 20, MIM# 617119, Joubert syndrome
Mendeliome v0.8008 RFX4 Zornitza Stark gene: RFX4 was added
gene: RFX4 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RFX4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RFX4 were set to 33658631
Phenotypes for gene: RFX4 were set to ID, ASD, ADHD
Review for gene: RFX4 was set to GREEN
Added comment: Report of 38 individuals (from 33 unrelated families) with de novo or inherited loss of function variants in RFX3 (15 families), RFX4 (4 families), and RFX7 (14 families), identified through WES. Individuals share neurobehavioural features including ASD, intellectual disability, and/or ADHD; other frequent features include hypersensitivity to sensory stimuli and sleep problems. RFX3, RFX4, and RFX7 are strongly expressed in developing and adult human brain, and X-box binding motifs as well as RFX ChIP-seq peaks are enriched in the cis-regulatory regions of known ASD risk genes. These genes are potentially critical transcriptional regulators of neurobiological pathways associated with neurodevelopmental disease pathogenesis.
Sources: Literature
Mendeliome v0.8006 RFX3 Zornitza Stark gene: RFX3 was added
gene: RFX3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RFX3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RFX3 were set to 33658631
Phenotypes for gene: RFX3 were set to ID, ASD, ADHD
Review for gene: RFX3 was set to GREEN
Added comment: Report of 38 individuals (from 33 unrelated families) with de novo or inherited loss of function variants in RFX3 (15 families), RFX4 (4 families), and RFX7 (14 families), identified through WES. Individuals share neurobehavioural features including ASD, intellectual disability, and/or ADHD; other frequent features include hypersensitivity to sensory stimuli and sleep problems. RFX3, RFX4, and RFX7 are strongly expressed in developing and adult human brain, and X-box binding motifs as well as RFX ChIP-seq peaks are enriched in the cis-regulatory regions of known ASD risk genes. These genes are potentially critical transcriptional regulators of neurobiological pathways associated with neurodevelopmental disease pathogenesis.
Sources: Literature
Mendeliome v0.8004 RFX7 Zornitza Stark gene: RFX7 was added
gene: RFX7 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RFX7 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RFX7 were set to 33658631
Phenotypes for gene: RFX7 were set to ID, ASD, ADHD
Review for gene: RFX7 was set to GREEN
Added comment: Report of 38 individuals (from 33 unrelated families) with de novo or inherited loss of function variants in RFX3 (15 families), RFX4 (4 families), and RFX7 (14 families), identified through WES. Individuals share neurobehavioural features including ASD, intellectual disability, and/or ADHD; other frequent features include hypersensitivity to sensory stimuli and sleep problems. RFX3, RFX4, and RFX7 are strongly expressed in developing and adult human brain, and X-box binding motifs as well as RFX ChIP-seq peaks are enriched in the cis-regulatory regions of known ASD risk genes. These genes are potentially critical transcriptional regulators of neurobiological pathways associated with neurodevelopmental disease pathogenesis.
Sources: Literature
Mendeliome v0.7993 FARSA Zornitza Stark edited their review of gene: FARSA: Added comment: Schuch et al. (2021) report 3 unrelated individuals with bi-allelic variants in FARSA. Identified through WES and variants segregated with disease. Functional evidence was obtained with reduced FARS1 enzyme activity levels in fibroblasts or EBV-transformed lymphoblastoid cell lines (EBV-LCLs) of patients. Common to all was a chronic interstitial lung disease starting early in life and characterized by bilateral ground-glass opacification on HR-CT, and cholesterol pneumonitis in lung histology. Additional abnormalities in other organ systems include liver disease, neurological manifestations, and growth restriction.; Changed rating: GREEN; Changed publications: 31355908, 33598926; Changed phenotypes: Rajab interstitial lung disease with brain calcifications 2, MIM# 619013
Mendeliome v0.7985 NIID Bryony Thompson STR: NIID was added
STR: NIID was added to Mendeliome. Sources: Literature
Mode of inheritance for STR: NIID was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for STR: NIID were set to 31178126; 31332381; 31819945; 33887199; 33943039; 32250060; 31332380; 32852534; 32989102
Phenotypes for STR: NIID were set to Neuronal intranuclear inclusion disease MIM#603472; Tremor, hereditary essential, 6 MIM#618866
Review for STR: NIID was set to GREEN
STR: NIID was marked as clinically relevant
Added comment: NM_001364012.2:c.-164GGC[(66_517)]
Large number of families and sporadic cases reported with expansions, with a range of neurodegenerative phenotypes, including: dementia, Parkinsonism/tremor, peripheral neuropathy, leukoencephalopathy, myopathy, motor neurone disease.
Normal repeat range: 7-60
Pathogenic repeat range: >=61-500
Mechanism of disease is translation of repeat expansion into a toxic polyglycine protein, identified in both mouse models and tissue samples from affected individuals.
Sources: Literature
Mendeliome v0.7949 SASH3 Zornitza Stark gene: SASH3 was added
gene: SASH3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SASH3 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: SASH3 were set to 33876203
Phenotypes for gene: SASH3 were set to Combined immunodeficiency; immune dysregulation
Review for gene: SASH3 was set to GREEN
Added comment: Four unrelated males reported presenting with combined immunodeficiency and immune dysregulation manifesting as recurrent sinopulmonary, cutaneous and mucosal infections, and refractory autoimmune cytopaenias. One missense variant, rest were nonsense.
Sources: Literature
Mendeliome v0.7946 FOXP1 Zornitza Stark changed review comment from: At least 5 unrelated individuals reported.; to: At least 30 unrelated individuals reported.
Mendeliome v0.7944 SCN7A Zornitza Stark gene: SCN7A was added
gene: SCN7A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SCN7A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SCN7A were set to 32732226
Phenotypes for gene: SCN7A were set to Holoprosencephaly
Review for gene: SCN7A was set to RED
Added comment: Novel candidate gene identified in a fetus with holoprosencephaly detected by ultrasound. Autopsy showed multiple congenital abnormalities including IUGR, microcephaly, bilateral, ablepharon, corpus callosum agenesis, myelomeningocele, tracheal atresia, absent nipples, unilateral simian crease, and hypoplastic phalanges. Compound heterozygous variants including a truncating variant were found by exome sequencing with concordant segregation.
Sources: Literature
Mendeliome v0.7938 WDR91 Zornitza Stark commented on gene: WDR91: PMID 32732226: Novel candidate gene identified in a fetus with hygroma and hydrocephaly detected by fetal ultrasound. Autopsy showed multiple congenital abnormalities including hygroma, macrocephaly, abnormal ears, unilateral simian crease, hydrocephaly, cerebellar hypoplasia, and interventricular communication. A homozygous truncating variant was found by exome sequencing with concordant segregation among 4 affected fetus, 2 healthy sibs and both parents. Mouse models support role in brain development.
Mendeliome v0.7937 ZNF3 Zornitza Stark gene: ZNF3 was added
gene: ZNF3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZNF3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZNF3 were set to 32732226
Phenotypes for gene: ZNF3 were set to Hydrocephalus; cleft palate; microphthalmia
Review for gene: ZNF3 was set to RED
Added comment: Novel candidate gene identified in a fetus with hydrocephaly and facial cleft detected by fetal ultrasound. Autopsy showed multiple congenital abnormalities including a median cleft palate, partial maxillar agenesis, bilateral severe microphthalmia, arhinencephaly, partial thalamic fusion. A homozygous truncating variant (c.396A>G/ p.*132Trpext*69) in ZNF3 was found by exome sequencing.
Sources: Literature
Mendeliome v0.7932 EIF2AK2 Zornitza Stark edited their review of gene: EIF2AK2: Added comment: Four unrelated families reported with dystonia, recurrent variant, (p.Gly130Arg); Changed publications: 32197074, 33866603; Changed phenotypes: Intellectual disability, white matter abnormalities, ataxia, regression with febrile illness, Dystonia
Mendeliome v0.7932 SLC37A4 Zornitza Stark Phenotypes for gene: SLC37A4 were changed from to Glycogen storage disease Ib 232220; Glycogen storage disease Ic 232240; Congenital disorder of glycosylation
Mendeliome v0.7929 SLC37A4 Zornitza Stark reviewed gene: SLC37A4: Rating: GREEN; Mode of pathogenicity: None; Publications: 33964207, 9675154, 9758626; Phenotypes: Glycogen storage disease Ib 232220, Glycogen storage disease Ic 232240, Congenital disorder of glycosylation; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7905 PLG Zornitza Stark changed review comment from: Association between mono-allelic variants and HAE: Over 20 families reported with a recurrent variant, p.Lys330Glu. Single family reported with a different variant. Note bi-allelic variants are associated with a separate disorder.

Bi-allelic variants and plasminogen deficiency: congenital plasminogen deficiency is characterised clinically by chronic mucosal pseudomembranous lesions consisting of subepithelial fibrin deposition and inflammation. The most common clinical manifestation is ligneous ('wood-like') conjunctivitis, a redness and subsequent formation of pseudomembranes mostly on the palpebral surfaces of the eye that progress to white, yellow-white, or red thick masses with a wood-like consistency that replace the normal mucosa. The lesions may be triggered by local injury and/or infection and often recur after local excision. Pseudomembranous lesions of other mucous membranes often occur in the mouth, nasopharynx, trachea, and female genital tract. Some affected children also have congenital occlusive hydrocephalus. At least 3 unrelated families reported.; to: Association between mono-allelic variants and HAE: Over 20 families reported with a recurrent variant, p.Lys330Glu. Single family reported with a different variant. Note bi-allelic variants are associated with a separate disorder.

Bi-allelic variants and plasminogen deficiency: congenital plasminogen deficiency is characterised clinically by chronic mucosal pseudomembranous lesions consisting of subepithelial fibrin deposition and inflammation. The most common clinical manifestation is ligneous ('wood-like') conjunctivitis, a redness and subsequent formation of pseudomembranes mostly on the palpebral surfaces of the eye that progress to white, yellow-white, or red thick masses with a wood-like consistency that replace the normal mucosa. The lesions may be triggered by local injury and/or infection and often recur after local excision. Pseudomembranous lesions of other mucous membranes often occur in the mouth, nasopharynx, trachea, and female genital tract. Some affected children also have congenital occlusive hydrocephalus. Over 20 unrelated families reported.
Mendeliome v0.7891 LTBP1 Chern Lim gene: LTBP1 was added
gene: LTBP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LTBP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LTBP1 were set to 33991472
Phenotypes for gene: LTBP1 were set to cutis laxa syndrome
Review for gene: LTBP1 was set to GREEN
gene: LTBP1 was marked as current diagnostic
Added comment: PMID:33991472
- Premature truncating variants in multiple affected individuals from 4 unrelated consanguineous families.
- Affected individuals present with connective tissue features (cutis laxa and inguinal hernia), craniofacial dysmorphology, variable heart defects, and prominent skeletal features (craniosynostosis, short stature, brachydactyly, and syndactyly).
- Functional studies done on patient fibroblasts and zebrafish models.
Sources: Literature
Mendeliome v0.7891 SLC30A5 Melanie Marty gene: SLC30A5 was added
gene: SLC30A5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SLC30A5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC30A5 were set to 33547425; 12095919
Phenotypes for gene: SLC30A5 were set to Perinatal lethal cardiomyopathy
Review for gene: SLC30A5 was set to AMBER
Added comment: Four affected children from two unrelated families with cardiomyopathy, hydrops fetalis, or cystic hygroma that all deceased perinatally. 2 different homozygous PTCs variants found. Knockout of SLC30A5 in mouse models showed reduced body growth and reduced bone density. About 60% of the mice died due to bradyarrhythmia.
Sources: Literature
Mendeliome v0.7891 ANGPTL8 Dean Phelan gene: ANGPTL8 was added
gene: ANGPTL8 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ANGPTL8 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ANGPTL8 were set to PMID: 33909604
Phenotypes for gene: ANGPTL8 were set to Low serum triglycerides; Coronary artery disease
Review for gene: ANGPTL8 was set to RED
Added comment: PMID: 33909604 - Population studies showed PTV are associated with both lipid levels and coronary artery disease.
Sources: Literature
Mendeliome v0.7891 PGM2L1 Chern Lim gene: PGM2L1 was added
gene: PGM2L1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PGM2L1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PGM2L1 were set to 33979636
Phenotypes for gene: PGM2L1 were set to severe developmental and speech delay, dysmorphic facial features, ear anomalies, high arched palate, strabismus, hypotonia, and keratosis pilaris
Review for gene: PGM2L1 was set to GREEN
gene: PGM2L1 was marked as current diagnostic
Added comment: PMID: 33979636:
- Hom/chet PTVs in 4 unrelated individuals. All four affected individuals had severe developmental and speech delay, dysmorphic facial features, ear anomalies, high arched palate, strabismus, hypotonia, and keratosis pilaris. Early obesity and seizures were present in three individuals.
- Studies on patient fibroblasts and cell lines indicated that PGM2L1 deficiency causes a decrease, but not a disappearance, of the sugar bisphosphates needed for the formation of NDP-sugars and that there is no evidence that this leads to a glycosylation defect.
Sources: Literature
Mendeliome v0.7878 RPL3L Zornitza Stark Phenotypes for gene: RPL3L were changed from Neonatal dilated cardiomyopathy to Cardiomyopathy, dilated, 2D, MIM# 619371; Neonatal dilated cardiomyopathy
Mendeliome v0.7877 RPL3L Zornitza Stark reviewed gene: RPL3L: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Cardiomyopathy, dilated, 2D, MIM# 619371, Neonatal dilated cardiomyopathy; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.7865 IQSEC2 Zornitza Stark reviewed gene: IQSEC2: Rating: GREEN; Mode of pathogenicity: None; Publications: 33368194, 20473311, 23674175; Phenotypes: Mental retardation, X-linked 1/78, MIM# 309530, MONDO:0010656, Severe intellectual disability-progressive postnatal microcephaly- midline stereotypic hand movements syndrome MONDO:0018347; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7817 TBXA2R Zornitza Stark Phenotypes for gene: TBXA2R were changed from to {Bleeding disorder, platelet-type, 13, susceptibility to}, MIM# 614009
Mendeliome v0.7813 TBXA2R Zornitza Stark reviewed gene: TBXA2R: Rating: AMBER; Mode of pathogenicity: None; Publications: 7929844, 19828703, 22517902; Phenotypes: {Bleeding disorder, platelet-type, 13, susceptibility to}, MIM# 614009; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.7813 P2RY12 Zornitza Stark Phenotypes for gene: P2RY12 were changed from to Bleeding disorder, platelet-type, 8, MIM# 609821; MONDO:0012354
Mendeliome v0.7810 P2RY12 Zornitza Stark reviewed gene: P2RY12: Rating: GREEN; Mode of pathogenicity: None; Publications: 11196645, 12578987, 29117459, 19237732; Phenotypes: Bleeding disorder, platelet-type, 8, MIM# 609821, MONDO:0012354; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7804 ITGA2B Zornitza Stark Phenotypes for gene: ITGA2B were changed from to Bleeding disorder, platelet-type, 16, MIM# 187800; MONDO:000855; Glanzmann thrombasthaenia 1, MIM# 273800
Mendeliome v0.7801 ITGA2B Zornitza Stark reviewed gene: ITGA2B: Rating: GREEN; Mode of pathogenicity: None; Publications: 1638023, 21454453, 8282784, 16463284; Phenotypes: Bleeding disorder, platelet-type, 16, MIM# 187800, MONDO:000855, Glanzmann thrombasthaenia 1, MIM# 273800; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7796 POU4F1 Bryony Thompson gene: POU4F1 was added
gene: POU4F1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: POU4F1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: POU4F1 were set to 33783914; 8876243
Phenotypes for gene: POU4F1 were set to Ataxia; intention tremor; hypotonia
Review for gene: POU4F1 was set to GREEN
Added comment: 4 unrelated probands presenting with paediatric onset ataxia, intention tremor, and hypotonia, with de novo loss of function variants, and supporting null mouse model.
Sources: Literature
Mendeliome v0.7780 GP6 Zornitza Stark Phenotypes for gene: GP6 were changed from to Bleeding disorder, platelet-type, 11, MIM# 614201; MONDO:0013623
Mendeliome v0.7777 GP6 Zornitza Stark reviewed gene: GP6: Rating: GREEN; Mode of pathogenicity: None; Publications: 19549989, 19552682, 23815599; Phenotypes: Bleeding disorder, platelet-type, 11, MIM# 614201, MONDO:0013623; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.7767 FGB Zornitza Stark changed review comment from: Inherited disorders of fibrinogen affect either the quantity (afibrinogenaemia and hypofibrinogenaemia) or the quality (dysfibrinogenemia) of the circulating fibrinogen or both.

Afibrinogenaemia is characterized by the complete absence of immunoreactive fibrinogen. Bleeding due to afibrinogenaemia usually manifests in the neonatal period, with 85% of cases presenting umbilical cord bleeding, but a later age of onst is not unusual. Bleeding may occur in the skin, gastrointestinal tract, genitourinary tract, or the central nervous system, with intracranial haemorrhage being reported as the major cause of death. Patients are susceptible to spontaneous rupture of the spleen. First-trimester pregnancy loss is common. Both arterial and venous thromboembolic complications have been reported. Hypofibrinogenaemia is a milder disorder. Well established gene-disease association.; to: Inherited disorders of fibrinogen affect either the quantity (afibrinogenaemia and hypofibrinogenaemia) or the quality (dysfibrinogenemia) of the circulating fibrinogen or both.

Afibrinogenaemia is characterized by the complete absence of immunoreactive fibrinogen. Bleeding due to afibrinogenaemia usually manifests in the neonatal period, with 85% of cases presenting umbilical cord bleeding, but a later age of onst is not unusual. Bleeding may occur in the skin, gastrointestinal tract, genitourinary tract, or the central nervous system, with intracranial haemorrhage being reported as the major cause of death. Patients are susceptible to spontaneous rupture of the spleen. First-trimester pregnancy loss is common. Both arterial and venous thromboembolic complications have been reported. Hypofibrinogenaemia is a milder disorder.

Well established gene-disease association.
Mendeliome v0.7750 F10 Zornitza Stark commented on gene: F10: Factor X deficiency shows variable phenotypic severity. Affected individuals can manifest prolonged nasal and mucosal haemorrhage, menorrhagia, haematuria, and occasionally haemarthrosis. More than 20 unrelated families reported.
Mendeliome v0.7749 MCM7 Arina Puzriakova gene: MCM7 was added
gene: MCM7 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MCM7 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MCM7 were set to 33654309; 34059554
Phenotypes for gene: MCM7 were set to Meier-Gorlin syndrome; Microcephaly; Intellectual disability; Lipodystrophy; Adrenal insufficiency
Review for gene: MCM7 was set to AMBER
Added comment: MCM7 is a component of the MCM complex, a DNA helicase which is essential for DNA replication. Other components have been linked to disease with phenotypes including microcephaly and ID. MCM7 is not associated with any phenotype in OMIM or G2P at present.
------
Currently there are 3 unrelated pedigrees in literature with different biallelic MCM7 variants associated with disease (see below). Although there is some functional data in support of variant-level deleteriousness or gene-level pathogenicity, the clinical gestalt is very different between the 3 families.

- PMID: 33654309 (2021) - Two unrelated individuals with different compound het variants in MCM7 but disparate clinical features. One patient had typical Meier-Gorlin syndrome (including growth retardation, microcephaly, congenital lung emphysema, absent breast development, microtia, facial dysmorphism) whereas the second case had a multi-system disorder with neonatal progeroid appearance, lipodystrophy and adrenal insufficiency. While small at birth, the second patient did not demonstrate reduced stature or microcephaly at age 14.5 years. Both individuals had normal neurodevelopment.
Functional studies using patient-derived fibroblasts demonstrate that the identified MCM7 variants were deleterious at either transcript or protein levels and through interfering with MCM complex formation, impact efficiency of S phase progression.

- PMID: 34059554 (2021) - Homozygous missense variant identified in three affected individuals from a consanguineous family with severe primary microcephaly, severe ID and behavioural abnormalities. Knockdown of Mcm7 in mouse neuroblastoma cells lead to reduced cell viability and proliferation with increased apoptosis, which were rescued by overexpression of wild-type but not mutant MCM7.
Sources: Literature
Mendeliome v0.7734 GEMIN5 Zornitza Stark gene: GEMIN5 was added
gene: GEMIN5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GEMIN5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GEMIN5 were set to 33963192
Phenotypes for gene: GEMIN5 were set to Neurodevelopmental disorder with cerebellar atrophy and motor dysfunction, MIM# 619333
Review for gene: GEMIN5 was set to GREEN
Added comment: Neurodevelopmental disorder with cerebellar atrophy and motor dysfunction (NEDCAM) is an autosomal recessive disorder characterized by global developmental delay with prominent motor abnormalities, mainly axial hypotonia, gait ataxia, and appendicular spasticity. Affected individuals have cognitive impairment and speech delay; brain imaging shows cerebellar atrophy. 30 individuals from 22 unrelated families reported.
Sources: Literature
Mendeliome v0.7726 KCNJ5 Zornitza Stark gene: KCNJ5 was added
gene: KCNJ5 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: KCNJ5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KCNJ5 were set to 21311022; 22203740; 24420545; 24574546
Phenotypes for gene: KCNJ5 were set to Hyperaldosteronism, familial, type III, MIM# 613677
Review for gene: KCNJ5 was set to GREEN
Added comment: Association with hyperaldosteronism: At least 5 unrelated families reported.

Association with Long QT: disputed.
Sources: Expert Review
Mendeliome v0.7680 PARP6 Zornitza Stark gene: PARP6 was added
gene: PARP6 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PARP6 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PARP6 were set to Cells 2021, 10(6), 1289; https://doi.org/10.3390/cells10061289
Phenotypes for gene: PARP6 were set to Intellectual disability; Epilepsy; Microcephaly
Review for gene: PARP6 was set to GREEN
Added comment: Four unrelated individuals reported with de novo variants in this gene and a neurodevelopmental phenotype. Supportive functional data. One pair of siblings with a homozygous missense: limited evidence for bi-allelic variants causing disease.
Sources: Literature
Mendeliome v0.7667 FAR1 Zornitza Stark Phenotypes for gene: FAR1 were changed from Peroxisomal fatty acyl-CoA reductase 1 disorder, MIM#616154; spastic paraparesis and bilateral cataracts to Peroxisomal fatty acyl-CoA reductase 1 disorder, MIM#616154; Cataracts, spastic paraparesis, and speech delay, MIM#619338
Mendeliome v0.7630 CPE Zornitza Stark gene: CPE was added
gene: CPE was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: CPE was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CPE were set to 26120850; 32936766
Phenotypes for gene: CPE were set to Intellectual developmental disorder and hypogonadotropic hypogonadism, MIM# 619326
Review for gene: CPE was set to AMBER
Added comment: Four affected individuals from two unrelated families reported, bi-allelic LoF variants.
Sources: Expert Review
Mendeliome v0.7628 CELSR1 Zornitza Stark gene: CELSR1 was added
gene: CELSR1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CELSR1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CELSR1 were set to 31215153; 31403174; 26855770
Phenotypes for gene: CELSR1 were set to Lymphatic malformation 9, MIM# 619319
Review for gene: CELSR1 was set to GREEN
Added comment: 3 unrelated families reported.
Sources: Literature
Mendeliome v0.7620 FBXW7 Zornitza Stark Phenotypes for gene: FBXW7 were changed from Developmental disorder to FBXW7-related neurodevelopmental syndrome
Mendeliome v0.7618 FBXW7 Elena Savva reviewed gene: FBXW7: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 33057194; Phenotypes: FBXW7-related neurodevelopmental syndrome; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.7599 ZPR1 Zornitza Stark gene: ZPR1 was added
gene: ZPR1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZPR1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZPR1 were set to 29851065
Phenotypes for gene: ZPR1 were set to Growth restriction, hypoplastic kidneys, alpecia, and distinctive facies 619321
Review for gene: ZPR1 was set to RED
Added comment: 3 families reported with growth restriction, hypoplastic kidneys, alopecia, and distinctive facies (GKAF). All were Hispanic families from the middle Rio Grande Valley. Homozygous missense identified in one family, p. Ile196Thr. Others unavailable for testing, founder effect postulated.
Sources: Literature
Mendeliome v0.7569 SPEG Zornitza Stark Phenotypes for gene: SPEG were changed from Centronuclear myopathy 5, MIM# 615959 to Centronuclear myopathy 5, MIM# 615959; Dilated cardiomyopathy
Mendeliome v0.7567 SPEG Zornitza Stark edited their review of gene: SPEG: Added comment: PMIDs 32925938;33794647: Reports of early onset isolated DCM, as well as cardiomyopathy in the context of skeletal myopathy.; Changed publications: 25087613, 31625632, 30412272, 30157964, 29614691, 29474540, 28624463, 26578207, 25087613, 32925938, 33794647; Changed phenotypes: Centronuclear myopathy 5, MIM# 615959, Dilated cardiomyopathy
Mendeliome v0.7561 SLC25A46 Zornitza Stark changed review comment from: Hereditary motor and sensory neuropathy type VIB is an autosomal recessive complex progressive neurologic disorder characterized mainly by early-onset optic atrophy resulting in progressive visual loss and peripheral axonal sensorimotor neuropathy with highly variable age at onset and severity. Affected individuals also have cerebellar or pontocerebellar atrophy on brain imaging, and they show abnormal movements, such as ataxia, dysmetria, and myoclonus.

At least 10 unrelated families reported, supportive functional data.; to: Hereditary motor and sensory neuropathy type VIB is an autosomal recessive complex progressive neurologic disorder characterized mainly by early-onset optic atrophy resulting in progressive visual loss and peripheral axonal sensorimotor neuropathy with highly variable age at onset and severity. Affected individuals also have cerebellar or pontocerebellar atrophy on brain imaging, and they show abnormal movements, such as ataxia, dysmetria, and myoclonus. New disease entity added by OMIM in 2021 to reflect this more severe end of the spectrum.

At least 10 unrelated families reported, supportive functional data.
Mendeliome v0.7557 SPI1 Zornitza Stark gene: SPI1 was added
gene: SPI1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SPI1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SPI1 were set to 33951726
Phenotypes for gene: SPI1 were set to Agammaglobulinaemia
Review for gene: SPI1 was set to GREEN
Added comment: Six unrelated individuals reported, four with de novo variants, two unphased. Some functional data.
Sources: Literature
Mendeliome v0.7549 TMEM222 Zornitza Stark gene: TMEM222 was added
gene: TMEM222 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TMEM222 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TMEM222 were set to 33824500
Phenotypes for gene: TMEM222 were set to Intellectual disability; Epilepsy; Microcephaly
Review for gene: TMEM222 was set to GREEN
Added comment: Polla et al (2021 - PMID: 33824500) report 17 individuals from 9 unrelated families, with biallelic TMEM222 pathogenic variants. The phenotype included motor, speech delay and moderate to severe ID (as universal features). Other manifestations included hypotonia (10/15), broad gait (5/12), seizures (7/17 - belonging to 6/9 families), MRI abnormalities (5/8). Variable behavioral abnormalities were observed (aggressive behavior, shy character, stereotypic movements etc). Abnormal OFC was a feature in several with microcephaly in 7 subjects from 4 families (measurements not available for all 17). Nonspecific facial features were reported in 10/17.
Sources: Literature
Mendeliome v0.7547 CHD5 Zornitza Stark gene: CHD5 was added
gene: CHD5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CHD5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CHD5 were set to 33944996
Phenotypes for gene: CHD5 were set to Intellectual disability; Epilepsy
Review for gene: CHD5 was set to GREEN
Added comment: 16 unrelated individuals reported with language deficits (81%), behavioral symptoms (69%), intellectual disability (64%), epilepsy (62%), and motor delay (56%).
Sources: Literature
Mendeliome v0.7541 FBXO31 Zornitza Stark edited their review of gene: FBXO31: Added comment: PMIDs 33675180; 32989326: three unrelated individuals with de novo missense variant, (p.Asp334Asn) and spastic-dystonic CP.; Changed rating: GREEN; Changed publications: 24623383, 33675180, 32989326; Changed phenotypes: Mental retardation, autosomal recessive 45, MIM#615979, Spastic-dystonic cerebral palsy, de novo dominant; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7537 ZNFX1 Zornitza Stark gene: ZNFX1 was added
gene: ZNFX1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZNFX1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZNFX1 were set to 33872655; 33876776
Phenotypes for gene: ZNFX1 were set to Multisystem inflammation; susceptibility to viral infections
Review for gene: ZNFX1 was set to GREEN
Added comment: 15 individuals from 8 families reported with multi-system inflammation and susceptibility to viral infections.

In addition, four indviduals from two unrelated kindreds reported with intermittent monocytosis and mycobacterial disease, including bacillus Calmette-Guérin-osis and disseminated tuberculosis.
Sources: Literature
Mendeliome v0.7535 STXBP3 Zornitza Stark gene: STXBP3 was added
gene: STXBP3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: STXBP3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: STXBP3 were set to 33891011
Phenotypes for gene: STXBP3 were set to Very Early Onset Inflammatory Bowel Disease; Bilateral Sensorineural Hearing Loss; Immune Dysregulation
Review for gene: STXBP3 was set to GREEN
Added comment: 10 individuals from 5 families reported.
Sources: Literature
Mendeliome v0.7509 PTPN4 Bryony Thompson gene: PTPN4 was added
gene: PTPN4 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PTPN4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PTPN4 were set to 17953619; 25424712; 30238967; DOI: https://doi.org/10.1016/j.xhgg.2021.100033
Phenotypes for gene: PTPN4 were set to Intellectual disability; developmental delay
Review for gene: PTPN4 was set to GREEN
Added comment: >3 unrelated probands and supporting mouse model
PMID: 17953619 - knockout mouse model has impaired motor learning and cerebellar synaptic plasticity
PMID: 25424712 - twins with a de novo whole gene deletion and a Rett-like neurodevelopmental disorder
PMID: 30238967 - mosaic de novo variant (p.Leu72Ser) identified in a child with developmental delay, autistic features, hypotonia, increased immunoglobulin E and dental problems. Also supporting mouse assays demonstrating loss of protein expression in dendritic spines
DOI: https://doi.org/10.1016/j.xhgg.2021.100033 - missense and truncating variants in six unrelated individuals with varying degrees of intellectual disability or developmental delay. 5 were able to undergo segregation analysis and found to be de novo.
Sources: Literature
Mendeliome v0.7491 NEK1 Zornitza Stark Phenotypes for gene: NEK1 were changed from to Short-rib thoracic dysplasia 6 with or without polydactyly, MIM# 263520; Amyotrophic lateral sclerosis, susceptibility to, 24, MIM# 617892
Mendeliome v0.7488 NEK1 Zornitza Stark reviewed gene: NEK1: Rating: GREEN; Mode of pathogenicity: None; Publications: 21211617, 22499340, 25492405, 28123176; Phenotypes: Short-rib thoracic dysplasia 6 with or without polydactyly, MIM# 263520, Amyotrophic lateral sclerosis, susceptibility to, 24, MIM# 617892; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7488 NEK1 Eleanor Williams reviewed gene: NEK1: Rating: GREEN; Mode of pathogenicity: None; Publications: 33445179; Phenotypes: {Amyotrophic lateral sclerosis, susceptibility to, 24}, OMIM:617892; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.7485 MED25 Zornitza Stark changed review comment from: Basel-Vanagaite-Smirin-Yosef syndrome is an autosomal recessive multiple congenital anomaly disorder characterized by severely delayed psychomotor development resulting in mental retardation, as well as variable eye, brain, cardiac, and palatal abnormalities.

7 individuals from 4 families reported initially, founder variant p.Tyr39Cys. Over 20 individuals reported since, including other variants.; to: Basel-Vanagaite-Smirin-Yosef syndrome is an autosomal recessive multiple congenital anomaly disorder characterized by severely delayed psychomotor development resulting in intellectual disability, as well as variable eye, brain, cardiac, and palatal abnormalities.

7 individuals from 4 families reported initially, founder variant p.Tyr39Cys. Over 20 individuals reported since, including other variants.
Mendeliome v0.7471 GJB1 Zornitza Stark Mode of inheritance for gene: GJB1 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7470 GJB1 Zornitza Stark reviewed gene: GJB1: Rating: GREEN; Mode of pathogenicity: None; Publications: 8266101, 17100997, 17353473, 31842800; Phenotypes: Charcot-Marie-Tooth neuropathy, X-linked dominant, 1, MIM# 302800, MONDO:0010549, reversible posterior leukoencephalopathy; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7464 VPS41 Kristin Rigbye changed review comment from: "Five unrelated families with nine affected individuals, all carrying homozygous variants in VPS41 that we show impact protein function. All affected individuals presented with a progressive neurodevelopmental disorder consisting of cognitive impairment, cerebellar atrophy/hypoplasia, motor dysfunction with ataxia and dystonia, and nystagmus. Zebrafish disease modelling supports the involvement of VPS41 dysfunction in the disorder, indicating lysosomal dysregulation throughout the brain and providing support for cerebellar and microglial abnormalities when vps41 was mutated. This provides the first example of human disease linked to the HOPS-specific subunit VPS41 and suggests the importance of HOPS complex activity for cerebellar function."; to: "Five unrelated families with nine affected individuals, all carrying homozygous variants in VPS41 that we show impact protein function. All affected individuals presented with a progressive neurodevelopmental disorder consisting of cognitive impairment, cerebellar atrophy/hypoplasia, motor dysfunction with ataxia and dystonia, and nystagmus. Zebrafish disease modelling supports the involvement of VPS41 dysfunction in the disorder, indicating lysosomal dysregulation throughout the brain and providing support for cerebellar and microglial abnormalities when vps41 was mutated. This provides the first example of human disease linked to the HOPS-specific subunit VPS41 and suggests the importance of HOPS complex activity for cerebellar function."

"Affected individuals were born after uneventful pregnancies and presented in most cases early in life with developmental delay. Various degrees of ataxia, hypotonia, and dystonia were present in all affected individuals, preventing independent ambulation. Likewise, nystagmus was commonly described. In addition, all affected individuals displayed intellectual disability and speech delay. Two siblings further presented with therapy-resistant epilepsy. No major dysmorphic features were found. In two individuals, retinal pigment alterations were noticed. Brain MRI revealed mild cerebellar atrophy and vermian atrophy without other major structural abnormalities in most affected individuals while in one case (Subject 9) bilateral hyperintensities at the nucleus caudatus area were noted. No hearing or vision problems were noted and in cases where nerve conduction studies were performed, these were normal. Transmission electron microscopy (TEM) on peripheral blood lymphocytes from Subject 2 and lymphoblastoid cells from Subject 3 revealed more multilayered vesicles compared to control cells."
Mendeliome v0.7464 DPYSL5 Michelle Torres gene: DPYSL5 was added
gene: DPYSL5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DPYSL5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DPYSL5 were set to 33894126
Phenotypes for gene: DPYSL5 were set to Neurodevelopmental disorder with corpus callosum agenesis and cerebellar abnormalities
Review for gene: DPYSL5 was set to GREEN
Added comment: Nine individuals with brain malformations, including corpus callosum agenesis and/or posterior fossa abnormalities, associated with variable degrees of intellectual disability. The recurrent de novo p.Glu41Lys was found in eight unrelated patients, and a p.Gly47Arg variant was identified in one individual from the first family reported with Ritscher-Schinzel syndrome. Both impaired DPYSL5 function on dendritic outgrowth regulation by preventing the formation of the ternary complex with MAP2 and βIII-tubulin, ultimately leading to abnormal brain development
Sources: Literature
Mendeliome v0.7441 CARS2 Zornitza Stark Phenotypes for gene: CARS2 were changed from to Combined oxidative phosphorylation deficiency 27, MIM# 616672; MONDO:0014728
Mendeliome v0.7438 CARS2 Zornitza Stark reviewed gene: CARS2: Rating: GREEN; Mode of pathogenicity: None; Publications: 25361775, 25787132, 30139652; Phenotypes: Combined oxidative phosphorylation deficiency 27, MIM# 616672, MONDO:0014728; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.7394 CHST11 Zornitza Stark gene: CHST11 was added
gene: CHST11 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: CHST11 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CHST11 were set to 26436107; 29514872
Phenotypes for gene: CHST11 were set to Osteochondrodysplasia, brachydactyly, and overlapping malformed digits, MIM# 618167
Review for gene: CHST11 was set to AMBER
Added comment: Osteochondrodysplasia, brachydactyly, and overlapping malformed digits (OCBMD) is characterized by bilateral symmetric skeletal defects that primarily affect the limbs. Affected individuals have mild short stature due to shortening of the lower leg bones, as well as hand and foot malformations, predominantly brachydactyly and overlapping digits. Other skeletal defects include scoliosis, dislocated patellae and fibulae, and pectus excavatum.

Two unrelated families reported, note one had a homozygous deletion. One family had 10 affected individuals.
Sources: Expert Review
Mendeliome v0.7388 EFEMP1 Zornitza Stark edited their review of gene: EFEMP1: Added comment: PMID 33807164: third unrelated family reported with CTD phenotype, single affected individual with bi-alllelic LoF variant, cutis laxa and multiple herniations.; Changed publications: 32006683, 31792352, 33807164
Mendeliome v0.7374 KCNJ6 Zornitza Stark changed review comment from: Keppen-Lubinsky syndrome characterised by severely delayed psychomotor development, hypertonia, hyperreflexia, generalized lipodystrophy giving an aged appearance, and distinctive dysmorphic features, including microcephaly, prominent eyes, narrow nasal bridge, and open mouth.

Three unrelated individuals reported with de novo variants in this gene (one recurred in 2), mouse model.; to: Keppen-Lubinsky syndrome characterised by severely delayed psychomotor development, hypertonia, hyperreflexia, generalized lipodystrophy giving an aged appearance, and distinctive dysmorphic features, including microcephaly, prominent eyes, narrow nasal bridge, and open mouth.

Four unrelated individuals reported with de novo variants in this gene (one recurred in 2), mouse model. One of the individuals did not have lipodystrophy but had a prominent hyperkinetic movement disorder.
Mendeliome v0.7363 LIG3 Zornitza Stark changed review comment from: Three unrelated families and functional data.
Sources: Literature; to: Seven individuals from three unrelated families and functional data, variable ages of onset from early childhood to late adolescence.
Sources: Literature
Mendeliome v0.7362 LIG3 Zornitza Stark gene: LIG3 was added
gene: LIG3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LIG3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LIG3 were set to 33855352
Phenotypes for gene: LIG3 were set to gut dysmotility; spasticity; ataxia; repetitive behaviours; neurogenic bladder; macular degeneration; leukoencephalopathy; cerebellar atrophy
Review for gene: LIG3 was set to GREEN
Added comment: Three unrelated families and functional data.
Sources: Literature
Mendeliome v0.7358 JMJD1C Zornitza Stark gene: JMJD1C was added
gene: JMJD1C was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: JMJD1C was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: JMJD1C were set to 26181491; 32996679
Phenotypes for gene: JMJD1C were set to Intellectual disability
Review for gene: JMJD1C was set to GREEN
Added comment: Reported in ID cohort (with Rett-like phenotypic overlap) with supporting functional studies (PMID: 26181491). 7 individuals with rare variants identified, and variants demonstrated to be de novo in 2, one with a Rett-like phenotype and the other with ID. Functional study of the JMJD1C mutant Rett syndrome patient demonstrated that the altered protein had abnormal subcellular localization, diminished activity to demethylate the DNA damage-response protein MDC1, and reduced binding to MECP2. JMJD1C protein shown to be widely expressed in brain regions and that its depletion compromised dendritic activity.

Splice-disrupting JMJD1C variant reported in association with learning disability and myoclonic epilepsy (PMID 32996679).

Disruption of gene due to balanced translocation (PMID 33591602) implicated in autism spectrum disease phenotype.
Sources: Expert Review
Mendeliome v0.7346 GCGR Zornitza Stark gene: GCGR was added
gene: GCGR was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: GCGR was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GCGR were set to 19657311; 25695890; 27933176; 30032256; 30294546
Phenotypes for gene: GCGR were set to Mahvash disease, MIM# 619290
Review for gene: GCGR was set to GREEN
Added comment: Mahvash disease (MVAH) is caused by inactivating mutations in the glucagon receptor, leading to alpha-cell hyperplasia of the pancreas, hyperglucagonaemia without glucagonoma syndrome, and occasional hypoglycaemia. The disease may lead to glucagonomas and/or primitive neuroectodermal tumours.

More than 5 unrelated families reported.
Sources: Expert list
Mendeliome v0.7343 ABCB6 Zornitza Stark Phenotypes for gene: ABCB6 were changed from to Pseudohyperkalemia, familial, 2, due to red cell leak, MIM# 609153; Microphthalmia, isolated, with coloboma 7, MIM# 614497; Dyschromatosis universalis hereditaria 3, MIM# 615402
Mendeliome v0.7340 ABCB6 Zornitza Stark reviewed gene: ABCB6: Rating: GREEN; Mode of pathogenicity: None; Publications: 23180570; Phenotypes: Pseudohyperkalemia, familial, 2, due to red cell leak, MIM# 609153, Microphthalmia, isolated, with coloboma 7, MIM# 614497, Dyschromatosis universalis hereditaria 3, MIM# 615402; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.7339 PRDM15 Zornitza Stark gene: PRDM15 was added
gene: PRDM15 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRDM15 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PRDM15 were set to 31950080
Phenotypes for gene: PRDM15 were set to Steroid resistant nephrotic syndrome; Holoprosencephaly
Review for gene: PRDM15 was set to AMBER
Added comment: Four consanguineous families reported with same homozygous variant, C844Y, shown to be LoF. Syndromic SRNS including HPE, brain malformations, polydactyly, congenital heart disease. Mouse model, extensive functional data focused on the brain phenotype. Two additional homozygous missense identified with isolated SRNS.
Sources: Literature
Mendeliome v0.7250 NDUFB11 Zornitza Stark Mode of inheritance for gene: NDUFB11 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7249 NDUFB11 Kristin Rigbye reviewed gene: NDUFB11: Rating: GREEN; Mode of pathogenicity: None; Publications: 28050600, 27488349, 30423443, 27488349; Phenotypes: Linear skin defects with multiple congenital anomalies 3, XLD (MIM#300952), Mitochondrial complex I deficiency, nuclear type 30, XLR (MIM#301021); Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7231 GP1BA Zornitza Stark Phenotypes for gene: GP1BA were changed from to Bernard-Soulier syndrome, type A1 (recessive), (MIM#231200), AR (AR BSS); von Willebrand disease, platelet-type, (MIM#177820), AD (VWD); MONDO:0008332; Bernard-Soulier syndrome, type A2 (dominant), (MIM#153670) (AD BSS); MONDO:0007930
Mendeliome v0.7229 GP1BA Zornitza Stark reviewed gene: GP1BA: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Bernard-Soulier syndrome, type A1 (recessive), (MIM#231200), AR (AR BSS), von Willebrand disease, platelet-type, (MIM#177820), AD (VWD), MONDO:0008332, Bernard-Soulier syndrome, type A2 (dominant), (MIM#153670) (AD BSS), MONDO:0007930; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7229 GP1BA Ain Roesley reviewed gene: GP1BA: Rating: GREEN; Mode of pathogenicity: None; Publications: 24934643; Phenotypes: Bernard-Soulier syndrome, type A1 (recessive), (MIM#231200), AR (AR BSS), von Willebrand disease, platelet-type, (MIM#177820), AD (VWD), Bernard-Soulier syndrome, type A2 (dominant), (MIM#153670) (AD BSS); Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7220 SDHA Zornitza Stark Phenotypes for gene: SDHA were changed from to Mitochondrial complex II deficiency, nuclear type 1, MIM# 252011; Cardiomyopathy, dilated, 1GG, MIM# 613642; Neurodegeneration with ataxia and late-onset optic atrophy, MIM# 619259; Paragangliomas 5 , MIM#614165
Mendeliome v0.7217 SDHA Zornitza Stark reviewed gene: SDHA: Rating: GREEN; Mode of pathogenicity: None; Publications: 10976639, 27683074, 7550341, 22972948, 20551992, 21752896; Phenotypes: Mitochondrial complex II deficiency, nuclear type 1, MIM# 252011, Cardiomyopathy, dilated, 1GG, MIM# 613642, Neurodegeneration with ataxia and late-onset optic atrophy, MIM# 619259, Paragangliomas 5 , MIM#614165; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7217 SLC19A1 Zornitza Stark gene: SLC19A1 was added
gene: SLC19A1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SLC19A1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC19A1 were set to 32276275
Phenotypes for gene: SLC19A1 were set to Megaloblastic anemia, folate-responsive, MIM# 601775
Review for gene: SLC19A1 was set to RED
Added comment: Single individual reported with in-frame deletion, some functional data.
Sources: Expert list
Mendeliome v0.7212 ERCC1 Zornitza Stark changed review comment from: Three unrelated families reported, variable severity reported from a Cockayne phenotype with congenital onset and early mortality, through to adolescent presentation with short stature, photosensitivity and progressive liver and renal dysfunction.; to: More than three unrelated families reported, variable severity reported from a Cockayne phenotype with congenital onset and early mortality, through to adolescent presentation with short stature, photosensitivity and progressive liver and renal dysfunction.
Mendeliome v0.7212 NDUFA8 Zornitza Stark Phenotypes for gene: NDUFA8 were changed from NDUFA8-related mitochondrial disease; Developmental delay; microcehaly; seizures to Mitochondrial complex I deficiency, nuclear type 37, MIM# 619272; Developmental delay; microcehaly; seizures
Mendeliome v0.7201 GREB1L Zornitza Stark edited their review of gene: GREB1L: Added comment: DFNA80 is characterized by nonsyndromic congenital deafness associated with absent or malformed cochleae and eighth cranial nerves. Four unrelated families reported, no comment on a renal phenotype. Note variants in this gene are also associated with renal agenesis.; Changed publications: 29100091, 29955957, 32585897; Changed phenotypes: Renal hypodysplasia/aplasia 3, OMIM# 617805, Deafness, autosomal dominant 80, MIM# 619274
Mendeliome v0.7199 ITGB3 Zornitza Stark Phenotypes for gene: ITGB3 were changed from to Bleeding disorder, platelet-type, 24, MIM#619271; MONDO:0008552
Mendeliome v0.7196 ITGB3 Zornitza Stark reviewed gene: ITGB3: Rating: GREEN; Mode of pathogenicity: None; Publications: 18065693, 19336737, 20081061, 23253071; Phenotypes: Bleeding disorder, platelet-type, 24, MIM#619271, MONDO:0008552; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.7192 ADCY6 Zornitza Stark changed review comment from: Laquerriere et al. (2014): 2 sibs from a consanguineous family with an axoglial form of lethal congenital contracture syndrome, and homozygous missense ADCY6 mutation (R1116C). The parents were heterozygous for the mutation. Knocked down ADCY6 orthologs in zebrafish showed a loss of myelin basic protein expression in the peripheral nervous system but no defects in Schwann cell migration and axonal growth. Gonzaga‐Jauregui et al. (2015): 1 patient with congenital hypotonia, distal joint contractures, hypomyelinating neuropathy, and vocal cord paralysis, and a homozygous missense ADCY6 variant. No functional studies. Deceased sister with a similar phenotype with hypotonia, areflexia, and hypomyelinating neuropathy who died at 18 months of respiratory insufficiency. Agolini et al. (2020): 1 patient with severe form of AMC, with two novel compound heterozygous variants in ADCY6 (parents confirmed carriers), but no functional studies.
Sources: Literature; to: - PMID: 33820833 (2021) - Further 2 sibs reported with a homozygous c.3346C>T:p.Arg1116Cys variant in the ADCY6 gene. The family was identified from a cohort of 315 genetically undiagnosed and unrelated AMC families. Arthrogryposis and IUGR were detected prenatally.

Laquerriere et al. (2014): 2 sibs from a consanguineous family with an axoglial form of lethal congenital contracture syndrome, and homozygous missense ADCY6 mutation (R1116C). The parents were heterozygous for the mutation. Knocked down ADCY6 orthologs in zebrafish showed a loss of myelin basic protein expression in the peripheral nervous system but no defects in Schwann cell migration and axonal growth. Gonzaga‐Jauregui et al. (2015): 1 patient with congenital hypotonia, distal joint contractures, hypomyelinating neuropathy, and vocal cord paralysis, and a homozygous missense ADCY6 variant. No functional studies. Deceased sister with a similar phenotype with hypotonia, areflexia, and hypomyelinating neuropathy who died at 18 months of respiratory insufficiency. Agolini et al. (2020): 1 patient with severe form of AMC, with two novel compound heterozygous variants in ADCY6 (parents confirmed carriers), but no functional studies.
Sources: Literature
Mendeliome v0.7191 UNC50 Arina Puzriakova gene: UNC50 was added
gene: UNC50 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: UNC50 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: UNC50 were set to 29016857; 33820833
Phenotypes for gene: UNC50 were set to Arthrogryposis multiplex congenita
Review for gene: UNC50 was set to AMBER
Added comment: UNC50 is currently not associated with any phenotype in OMIM (last edited on 02/01/2018) or Gene2Phenotype.

- PMID: 29016857 (2017) - Homozygosity mapping of disease loci combined with WES in a single male from a consanguineous family presenting with lethal AMC revealed a homozygous frameshift deletion in UNC50 gene (c.750_751del:p.Cys251Phefs*4). Functional studies in C. elegans showed the variant caused loss of acetylcholine receptor expression in the muscle.

- PMID: 33820833 (2021) - Single individual reported with the same homozygous c.750_751del:p.Cys251Phefs*4 variant in UNC50 as previously described. The case was identified from a cohort of 315 genetically undiagnosed and unrelated AMC families. Arthrogryposis and tetra ventricular dilation were detected prenatally.

-- Note: it isn't definitively clear whether these are different individuals. Both are singleton males born to consanguineous parents, with the same variant and similar phenotype. Also both infants died at 28 w.g. However, the 2021 paper (PMID:33820833) states their patient was selected from a cohort of cases without a molecular diagnosis and indicate the UNC50 gene had already previously been identified in relation to this phenotype, highlighting the earlier paper (PMID:29016857). There is also no mention of tetra ventricular dilation in the first case, so it is likely that these do represent distinct individuals. Additional cases needed to provide clarity.
Sources: Literature
Mendeliome v0.7191 PLCH1 Arina Puzriakova gene: PLCH1 was added
gene: PLCH1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PLCH1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PLCH1 were set to 33820834
Phenotypes for gene: PLCH1 were set to Holoprosencephaly spectrum; Severe developmental delay; Brain malformations
Review for gene: PLCH1 was set to AMBER
Added comment: PLCH1 is currently not associated with any phenotype in OMIM (last edited on 16/06/2009) or Gene2Phenotype.

- PMID: 33820834 (2021) - Two sibling pairs from two unrelated families with a holoprosencephaly spectrum phenotype and different homozygous PLCH1 variants (c.2065C>T, p.Arg689* and c.4235delA, p.Cys1079ValfsTer16, respectively). One family presented with congenital hydrocephalus, epilepsy, significant developmental delay and a monoventricle or fused thalami; while sibs from the second family had alobar holoprosencephaly and cyclopia. 3/4 individuals also displayed a cleft palate and congenital heart disease.
Human embryo immunohistochemistry showed PLCH1 to be expressed in the notorcord, developing spinal cord (in a ventral to dorsal gradient), dorsal root ganglia, cerebellum and dermatomyosome.
Sources: Literature
Mendeliome v0.7187 PDIA6 Zornitza Stark gene: PDIA6 was added
gene: PDIA6 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PDIA6 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: PDIA6 were set to Asphyxiating thoracic dystrophy (ATD) syndrome and infantile‐onset diabetes
Review for gene: PDIA6 was set to AMBER
Added comment: Amber in view of the good quality functional data.

1 case with asphyxiating thoracic dystrophy (ATD) syndrome and infantile‐onset diabetes. Whole exome sequencing revealed a homozygous frameshift variant in the PDIA6 gene. RNA expression was reduced in a gene dosage‐dependent manner, supporting a loss‐of‐function effect of this variant. Phenotypic correlation with the previously reported mouse model recapitulated the growth defect and delay, early lethality, coagulation, diabetes, immunological, and polycystic kidney disease phenotypes. The phenotype of the current patient is consistent with phenotypes associated with the disruption of PDIA6 and the sensors of UPR in mice and humans.
Sources: Literature
Mendeliome v0.7182 UBE4A Zornitza Stark gene: UBE4A was added
gene: UBE4A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: UBE4A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: UBE4A were set to 33420346
Phenotypes for gene: UBE4A were set to Intellectual disability and global developmental delay
Review for gene: UBE4A was set to GREEN
Added comment: 8 individuals, from 4 unrelated families, with syndromic intellectual disability and global developmental delay (other clinical features included hypotonia, short stature, seizures, and behaviour disorder. Exome sequencing identified biallelic loss-of-function variants in UBE4A in the 4 families, with variants segregating with disease and parents carriers. They demonstrated that UBE4A loss-of-function variants reduced RNA expression and protein levels in clinical samples. Mice generated to mimic patient-specific Ube4a loss-of-function variant exhibited muscular and neurological/behavioural abnormalities, some of which are suggestive of the clinical abnormalities seen in the affected individuals.
Sources: Literature
Mendeliome v0.7180 MAPKAPK5 Zornitza Stark gene: MAPKAPK5 was added
gene: MAPKAPK5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MAPKAPK5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MAPKAPK5 were set to 3344202
Phenotypes for gene: MAPKAPK5 were set to Developmental delay, variable brain anomalies, congenital heart defects, dysmorphic
Review for gene: MAPKAPK5 was set to GREEN
Added comment: 3 individuals from 2 families with severe developmental delay, variable brain anomalies, congenital heart defects, dysmorphic facial features, and a distinctive type of synpolydactyly with an additional hypoplastic digit between the fourth and fifth digits of hands and/or feet. Exome sequencing identified different homozygous truncating variants in MAPKAPK5 in both families, segregating with disease and unaffected parents as carriers.

Patient-derived cells showed no expression of MAPKAPK5 protein isoforms and reduced levels of the MAPKAPK5-interacting protein ERK3. F-actin recovery after latrunculin B treatment was found to be less efficient in patient-derived fibroblasts than in control cells, supporting a role of MAPKAPK5 in F-actin polymerization.
Sources: Literature
Mendeliome v0.7179 FAR1 Zornitza Stark Phenotypes for gene: FAR1 were changed from Peroxisomal fatty acyl-CoA reductase 1 disorder, MIM#616154 to Peroxisomal fatty acyl-CoA reductase 1 disorder, MIM#616154; spastic paraparesis and bilateral cataracts
Mendeliome v0.7175 FAR1 Zornitza Stark edited their review of gene: FAR1: Added comment: PMID33239752: 12 patients with paediatric onset spastic paraparesis and bilateral congenital/juvenile cataracts. Most also had speech and gross motor developmental delay and truncal hypotonia. Exome sequencing identified de novo variants affecting the Arg480 residue in FAR1 (p.Arg480Cys/His/Leu). Further functional studies in fibroblasts showed that these variants cause a disruption of the plasmalogen-dependent feedback regulation of FAR1 protein levels leading to uncontrolled ether lipid production.; Changed rating: GREEN; Changed publications: 25439727, 33239752; Changed phenotypes: Peroxisomal fatty acyl-CoA reductase 1 disorder, MIM#616154, spastic paraparesis and bilateral cataracts; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7135 LAMP2 Zornitza Stark changed review comment from: XLD. Vacuolar cardiomyopathy and myopathy. Gene encodes lysosome-associated membrane protein-2.; to: XLD. Gene encodes lysosome-associated membrane protein-2.

Danon disease is an X-linked dominant disorder predominantly affecting cardiac muscle. Skeletal muscle involvement and mental retardation are variable features. The accumulation of glycogen in muscle and lysosomes originally led to the classification of Danon disease as a variant of glycogen storage disease II (Pompe disease) with 'normal acid maltase' or alpha-glucosidase, however, it may be more accurately classified as a lysosomal disorder.
Mendeliome v0.7134 LAMP2 Zornitza Stark Mode of inheritance for gene: LAMP2 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7133 LAMP2 Zornitza Stark reviewed gene: LAMP2: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Danon disease, MIM# 300257, MONDO:0010281; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7121 TSPOAP1 Ain Roesley gene: TSPOAP1 was added
gene: TSPOAP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TSPOAP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TSPOAP1 were set to 33539324
Phenotypes for gene: TSPOAP1 were set to Dystonia, intellectual disability and cerebellar atrophy
Penetrance for gene: TSPOAP1 were set to unknown
Review for gene: TSPOAP1 was set to GREEN
Added comment: 7 affecteds from 3 families (1 consanguineous)
2x null, 1x missense

Affecteds with the null variants presented with juvenile-onset progressive generalized dystonia, associated with intellectual disability and cerebellar atrophy while those with the missense p.(Gly1808Ser) presented with isolated adult-onset focal dystonia (mild cognitive impairment noted)

mice KO models were investigated
Sources: Literature
Mendeliome v0.7121 CLDN11 Melanie Marty gene: CLDN11 was added
gene: CLDN11 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CLDN11 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CLDN11 were set to 33313762
Phenotypes for gene: CLDN11 were set to Hypomyelinating leukodystrophy
Review for gene: CLDN11 was set to GREEN
Added comment: In three unrelated individuals with early-onset spastic movement disorder, expressive speech disorder and eye abnormalities including hypermetropia, 2 different heterozygous de novo stop-loss variants were identified. One of the variants did not lead to a loss of CLDN11 expression on RNA level in fibroblasts indicating this transcript is not subject to nonsense-mediated decay and most likely translated into an extended protein.
Sources: Literature
Mendeliome v0.7121 SYK Paul De Fazio gene: SYK was added
gene: SYK was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SYK was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: SYK were set to 33782605
Phenotypes for gene: SYK were set to Immune dysregulation and systemic inflammation
Mode of pathogenicity for gene: SYK was set to Other
Review for gene: SYK was set to GREEN
gene: SYK was marked as current diagnostic
Added comment: 5 unrelated patients with monoallelic missense variants in SYK with immune deficiency, multi-organ inflammatory disease such as colitis, arthritis and dermatitis, and diffuse large B cell lymphomas. 2 patients were confirmed de novo, others were undetermined. Variants exhibited a GoF effect in functional studies. A knock-in mouse model of a patient variant recapitulated aspects of the human disease.
Sources: Literature
Mendeliome v0.7113 MESP1 Zornitza Stark gene: MESP1 was added
gene: MESP1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MESP1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MESP1 were set to 28677747; 28050627; 27185833; 26694203
Phenotypes for gene: MESP1 were set to Congenital heart disease
Review for gene: MESP1 was set to AMBER
Added comment: Rare/novel variants reported in at least 7 unrelated individuals with congenital heart disease, in-silicos conflicting, familial segregation only available for some (one de novo, three inherited, others unresolved). Functional data implicates gene in cardiac development.
Sources: Expert list
Mendeliome v0.7084 FBN2 Zornitza Stark edited their review of gene: FBN2: Added comment: The association between mono-allelic variants in FBN2 and CCA is well established. Recent report of bi-allelic variants, Kloth (2021): biallelic FBN2 variants (PTC/missense) in a teenager with severe CCA, including cardiac defects, mild scoliosis and muscular involvement. Carrier parents both "healthy/unaffected". Phenotype matches mouse K/O. Authors performed a lit review and identified an additional 2 homozygous patients (both missense variants) with - fetal akinesia, brain ischemia and neonatal death - severe muscle weakness with bilateral clubfeet, a pronounced gait disturbance, recurrent patellar dislocations, flexion contractures, camptodactyly, widespread striae and an unusual myofibrillar disorganization, variation in fiber size and atrophic fibers in muscle biopsy.

Evidence for association with Macular degeneration, early-onset MIM#616118 is limited. One family reported, plus some rare variants reported in cohort studies. The familial variant p.Glu1144Lys is present in 11 hets in gnomad and has benign in silicos. The second variant reported in the paper, p.Met1247Thr is present in >20 hets.; Changed rating: GREEN; Changed publications: 33571691; Changed phenotypes: Contractural arachnodactyly, congenital MIM#121050, Macular degeneration, early-onset MIM#616118; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7075 CELA3B Bryony Thompson gene: CELA3B was added
gene: CELA3B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CELA3B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CELA3B were set to 31369399; 33565216
Phenotypes for gene: CELA3B were set to Chronic pancreatitis
Mode of pathogenicity for gene: CELA3B was set to Other
Review for gene: CELA3B was set to AMBER
Added comment: PMID: 33565216 - p.Arg90Cys (c.268C>T) identified in a chronic pancreatitis (also diabetes and pancreatic adenocarcinoma present in some individuals) pedigree. Variant was present in 2 affected individuals and not present in 7 healthy relatives. Also, supporting in vitro functional assays demonstrating gain of function mechanism for R90C and R90L, and supporting mouse model.
PMID: 31369399 - p.Arg90Leu (c.269G>T) identified in 4 French chronic pancreatitis cases and 0 controls. However, there are 229 hets in gnomAD v2.1 with this variant.
Sources: Literature
Mendeliome v0.7056 CCDC88C Paul De Fazio changed review comment from: Heterozygous missense variant (gnomad: 1 het) reported in a 48-year-old Sudanese female presented with pure early onset hereditary spastic paraplegia. In contrast to previous reports, she developed neurological symptoms in early childhood and showed neither features of cerebellar ataxia, extrapyramidal signs, nor evidence of intellectual involvement. Functional studies showed the varaint induced JNK hyper-phosphorylation and enhanced apoptosis. 4 unaffected family members did not have the variant.

This phenotype appears to be sufficiently dissimilar to the 2 previously reported SCA families to not constitute a 3rd supporting report in that context.; to: Heterozygous missense variant (gnomad: 1 het) reported in a 48-year-old Sudanese female presented with pure early onset hereditary spastic paraplegia. In contrast to previous reports, she developed neurological symptoms in early childhood and showed neither features of cerebellar ataxia, extrapyramidal signs, nor evidence of intellectual involvement. Functional studies showed the varaint induced JNK hyper-phosphorylation and enhanced apoptosis. 4 unaffected family members did not have the variant.

NB: Rated Amber as this phenotype appears to be sufficiently dissimilar to the 2 previously reported SCA families to not constitute a 3rd supporting report in that context. Gene remains Green for the AR ID phenotype.
Mendeliome v0.7029 ATCAY Zornitza Stark edited their review of gene: ATCAY: Added comment: Report of a variant c.599_605del, p.Pro200Profs*20 (PMID 29449188), which is in addition to the previously reported linked variants in the Cayman population (c.965+3G > T & p.S301R)(PMID 29449188). Mouse and zebra fish models share phenotypic features with humans with Ataxia, cerebellar, Cayman type (OMIM:601238)(PMID 14556008; 26343454).; Changed rating: GREEN; Changed publications: 14556008, 29449188, 23226316, 26343454; Changed phenotypes: Ataxia, cerebellar, Cayman type, MIM# 601238, MONDO:0011025
Mendeliome v0.7027 ARAP3 Zornitza Stark gene: ARAP3 was added
gene: ARAP3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ARAP3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ARAP3 were set to 32908855
Phenotypes for gene: ARAP3 were set to Lymphoedema
Review for gene: ARAP3 was set to AMBER
Added comment: Three unrelated families reported with rare missense variants in this gene as part of a lymphoedema cohort. However, incomplete information regarding segregation and no supporting functional data.
Sources: Literature
Mendeliome v0.7005 PORCN Zornitza Stark Mode of inheritance for gene: PORCN was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7004 PORCN Zornitza Stark reviewed gene: PORCN: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Focal dermal hypoplasia, MIM# 305600; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.7004 PRIM1 Zornitza Stark changed review comment from: - PMID: 33060134 (2020) - From a cohort of 220 families with microcephalic dwarfism spectrum disorders (OFC ≤−4 SD; height ≤−2 SD), three families (4 individuals) were identified with the same homozygous intronic variant (c.638+36C>G) in PRIM1. This variant was present in gnomAD in 2 individuals across all populations, but only in a heterozygous state. Haplotype analysis indicated that all three families share a distant common ancestor - i.e. confirmed founder variant.
Authors subsequently identified a single individual with compound heterozygous PRIM1 variants (c.103+1G>T, c.901T>C) from the DDD study, who also presented microcephaly and short stature (OFC ≤−3 SD; height ≤−3 SD).

Clinical overlap was evident in all 5 individuals, presenting extreme pre- and postnatal growth restriction, severe microcephaly (OFC −6.0 ± 1.5 SD) with simplified gyri appearance, hypothyroidism, hypo/agammaglobulinaemia, and lymphopaenia accompanied by intermittent anaemia/thrombocytopaenia. All had chronic respiratory symptoms, and four died in early childhood from respiratory or GI infections.

Functional studies demonstrated reduced PRIM1 protein levels, replication fork defects and prolonged S-phase duration in PRIM1-deficient cells. The resulting delay to the cell cycle and inability to sustain sufficient cell proliferation provides a likely mechanism for the presenting phenotype.
Sources: Literature; to: - PMID: 33060134 (2020) - From a cohort of 220 families with microcephalic dwarfism spectrum disorders (OFC ≤−4 SD; height ≤−2 SD), three families (4 individuals) were identified with the same homozygous intronic variant (c.638+36C>G) in PRIM1. This variant was present in gnomAD in 2 individuals across all populations, but only in a heterozygous state. Haplotype analysis indicated that all three families share a distant common ancestor - i.e. confirmed founder variant.
Authors subsequently identified a single individual with compound heterozygous PRIM1 variants (c.103+1G>T, c.901T>C) from the DDD study, who also presented microcephaly and short stature (OFC ≤−3 SD; height ≤−3 SD).

Clinical overlap was evident in all 5 individuals, presenting extreme pre- and postnatal growth restriction, severe microcephaly (OFC −6.0 ± 1.5 SD) with simplified gyri appearance, hypothyroidism, hypo/agammaglobulinaemia, and lymphopaenia accompanied by intermittent anaemia/thrombocytopaenia. All had chronic respiratory symptoms, and four died in early childhood from respiratory or GI infections.

Functional studies demonstrated reduced PRIM1 protein levels, replication fork defects and prolonged S-phase duration in PRIM1-deficient cells. The resulting delay to the cell cycle and inability to sustain sufficient cell proliferation provides a likely mechanism for the presenting phenotype.
Sources: Literature
Mendeliome v0.7003 PRIM1 Zornitza Stark changed review comment from: - PMID: 33060134 (2020) - From a cohort of 220 families with microcephalic dwarfism spectrum disorders (OFC ≤−4 SD; height ≤−2 SD), three families (4 individuals) were identified with the same homozygous intronic variant (c.638+36C>G) in PRIM1. This variant was present in gnomAD in 2 individuals across all populations, but only in a heterozygous state. Haplotype analysis indicated that all three families share a distant common ancestor - i.e. confirmed founder variant.
Authors subsequently identified a single individual with compound heterozygous PRIM1 variants (c.103+1G>T, c.901T>C) from the DDD study, who also presented microcephaly and short stature (OFC ≤−3 SD; height ≤−3 SD).

Clinical overlap was evident in all 5 individuals, presenting extreme pre- and postnatal growth restriction, severe microcephaly (OFC −6.0 ± 1.5 SD) with simplified gyri appearance, hypothyroidism, hypo/agammaglobulinemia, and lymphopenia accompanied by intermittent anaemia/thrombocytopaenia. All had chronic respiratory symptoms, and four died in early childhood from respiratory or GI infections.

Functional studies demonstrated reduced PRIM1 protein levels, replication fork defects and prolonged S-phase duration in PRIM1-deficient cells. The resulting delay to the cell cycle and inability to sustain sufficient cell proliferation provides a likely mechanism for the presenting phenotype.
Sources: Literature; to: - PMID: 33060134 (2020) - From a cohort of 220 families with microcephalic dwarfism spectrum disorders (OFC ≤−4 SD; height ≤−2 SD), three families (4 individuals) were identified with the same homozygous intronic variant (c.638+36C>G) in PRIM1. This variant was present in gnomAD in 2 individuals across all populations, but only in a heterozygous state. Haplotype analysis indicated that all three families share a distant common ancestor - i.e. confirmed founder variant.
Authors subsequently identified a single individual with compound heterozygous PRIM1 variants (c.103+1G>T, c.901T>C) from the DDD study, who also presented microcephaly and short stature (OFC ≤−3 SD; height ≤−3 SD).

Clinical overlap was evident in all 5 individuals, presenting extreme pre- and postnatal growth restriction, severe microcephaly (OFC −6.0 ± 1.5 SD) with simplified gyri appearance, hypothyroidism, hypo/agammaglobulinaemia, and lymphopaenia accompanied by intermittent anaemia/thrombocytopaenia. All had chronic respiratory symptoms, and four died in early childhood from respiratory or GI infections.

Functional studies demonstrated reduced PRIM1 protein levels, replication fork defects and prolonged S-phase duration in PRIM1-deficient cells. The resulting delay to the cell cycle and inability to sustain sufficient cell proliferation provides a likely mechanism for the presenting phenotype.
Sources: Literature
Mendeliome v0.7003 PRIM1 Zornitza Stark changed review comment from: - PMID: 33060134 (2020) - From a cohort of 220 families with microcephalic dwarfism spectrum disorders (OFC ≤−4 SD; height ≤−2 SD), three families (4 individuals) were identified with the same homozygous intronic variant (c.638+36C>G) in PRIM1. This variant was present in gnomAD in 2 individuals across all populations, but only in a heterozygous state. Haplotype analysis indicated that all three families share a distant common ancestor - i.e. confirmed founder variant.
Authors subsequently identified a single individual with compound heterozygous PRIM1 variants (c.103+1G>T, c.901T>C) from the DDD study, who also presented microcephaly and short stature (OFC ≤−3 SD; height ≤−3 SD).

Clinical overlap was evident in all 5 individuals, presenting extreme pre- and postnatal growth restriction, severe microcephaly (OFC −6.0 ± 1.5 SD) with simplified gyri appearance, hypothyroidism, hypo/agammaglobulinemia, and lymphopenia accompanied by intermittent anaemia/thrombocytopenia. All had chronic respiratory symptoms, and four died in early childhood from respiratory or GI infections.

Functional studies demonstrated reduced PRIM1 protein levels, replication fork defects and prolonged S-phase duration in PRIM1-deficient cells. The resulting delay to the cell cycle and inability to sustain sufficient cell proliferation provides a likely mechanism for the presenting phenotype.
Sources: Literature; to: - PMID: 33060134 (2020) - From a cohort of 220 families with microcephalic dwarfism spectrum disorders (OFC ≤−4 SD; height ≤−2 SD), three families (4 individuals) were identified with the same homozygous intronic variant (c.638+36C>G) in PRIM1. This variant was present in gnomAD in 2 individuals across all populations, but only in a heterozygous state. Haplotype analysis indicated that all three families share a distant common ancestor - i.e. confirmed founder variant.
Authors subsequently identified a single individual with compound heterozygous PRIM1 variants (c.103+1G>T, c.901T>C) from the DDD study, who also presented microcephaly and short stature (OFC ≤−3 SD; height ≤−3 SD).

Clinical overlap was evident in all 5 individuals, presenting extreme pre- and postnatal growth restriction, severe microcephaly (OFC −6.0 ± 1.5 SD) with simplified gyri appearance, hypothyroidism, hypo/agammaglobulinemia, and lymphopenia accompanied by intermittent anaemia/thrombocytopaenia. All had chronic respiratory symptoms, and four died in early childhood from respiratory or GI infections.

Functional studies demonstrated reduced PRIM1 protein levels, replication fork defects and prolonged S-phase duration in PRIM1-deficient cells. The resulting delay to the cell cycle and inability to sustain sufficient cell proliferation provides a likely mechanism for the presenting phenotype.
Sources: Literature
Mendeliome v0.7003 PRIM1 Zornitza Stark gene: PRIM1 was added
gene: PRIM1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRIM1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PRIM1 were set to 33060134
Phenotypes for gene: PRIM1 were set to Microcephalic primordial dwarfism, MONDO:0017950
Review for gene: PRIM1 was set to AMBER
Added comment: - PMID: 33060134 (2020) - From a cohort of 220 families with microcephalic dwarfism spectrum disorders (OFC ≤−4 SD; height ≤−2 SD), three families (4 individuals) were identified with the same homozygous intronic variant (c.638+36C>G) in PRIM1. This variant was present in gnomAD in 2 individuals across all populations, but only in a heterozygous state. Haplotype analysis indicated that all three families share a distant common ancestor - i.e. confirmed founder variant.
Authors subsequently identified a single individual with compound heterozygous PRIM1 variants (c.103+1G>T, c.901T>C) from the DDD study, who also presented microcephaly and short stature (OFC ≤−3 SD; height ≤−3 SD).

Clinical overlap was evident in all 5 individuals, presenting extreme pre- and postnatal growth restriction, severe microcephaly (OFC −6.0 ± 1.5 SD) with simplified gyri appearance, hypothyroidism, hypo/agammaglobulinemia, and lymphopenia accompanied by intermittent anaemia/thrombocytopenia. All had chronic respiratory symptoms, and four died in early childhood from respiratory or GI infections.

Functional studies demonstrated reduced PRIM1 protein levels, replication fork defects and prolonged S-phase duration in PRIM1-deficient cells. The resulting delay to the cell cycle and inability to sustain sufficient cell proliferation provides a likely mechanism for the presenting phenotype.
Sources: Literature
Mendeliome v0.6921 TMEM231 Zornitza Stark changed review comment from: Two families described with the Joubert phenotype, severely affected, not ambulant.; to: More than 3 unrelated families reported with each phenotype, functional data.
Mendeliome v0.6915 TMEM138 Zornitza Stark changed review comment from: Ataxia not specifically reported in association with this gene.; to: At least 5 unrelated families reported.
Mendeliome v0.6908 SMCHD1 Zornitza Stark edited their review of gene: SMCHD1: Added comment: Bosma arhinia microphthalmia syndrome (BAMS) is characterized by severe hypoplasia of the nose and eyes, palatal abnormalities, deficient taste and smell, inguinal hernias, hypogonadotropic hypogonadism with cryptorchidism, and normal intelligence. Choanal atresia is a feature. More than 30 unrelated individuals reported. Caused by gain of function missense variants with the extended ATPase domain.; Changed rating: GREEN; Changed mode of pathogenicity: Other; Changed publications: 28067909; Changed phenotypes: Bosma arhinia microphthalmia syndrome, MIM# 603457, Arhinia, choanal atresia, microphthalmia MONDO:0011323; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.6901 SPINT2 Zornitza Stark changed review comment from: More than 15 unrelated families reported.; to: Well established gene-disease association. PMID 30445423 reviews 34 patients from 26 families: 13 different variants in SPINT2 were seen, including 3 premature termination codons, 2 start codon removals, and 3 canonical splice site variants, supporting loss of function as the pathogenic mechanism. The most commonly observed variant was Y163C, observed in 40 (59%) of 68 disease alleles. Seven unrelated patients with the Y163C mutation had a shared haplotype, suggesting that it is a founder mutation. Choanal atresia (20/34) and keratitis of infantile onset (26/34) were the most common findings. All patients presented with intractable diarrhoea, with onset typically in the first 2 weeks of life. Episodes of intestinal pseudoobstruction sometimes preceded the onset of diarrhoea. Characteristic epithelial tufts on intestinal histology were seen in 13 of the 34 patients.
Mendeliome v0.6893 IPO8 Zornitza Stark gene: IPO8 was added
gene: IPO8 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: IPO8 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: IPO8 were set to Loeys-Dietz syndrome-like; cardiovascular, neurologic, skeletal and immunologic abnormalities
Review for gene: IPO8 was set to AMBER
Added comment: 12 individuals from 9 unrelated families in a cohort submitted for publication with bi-allelic IPO8 variants. Variants were nonsense/splice and some missense. Patients displayed a phenotype reminiscent of Loeys Dietz syndrome that variably combined cardiovascular, neurologic, skeletal and immunologic abnormalities along with dysmorphic features. Western blot on patient cells (4 individuals) showed reduced IPO8 expression. Disruption of IPO8 homologue in zebrafish associated with cardiac anomalies. Transcriptome analysis in zebrafish showed that IPO8-deficient zebrafish had abnormal TGFbeta pathway expression.
Sources: Expert Review
Mendeliome v0.6888 POLR3A Zornitza Stark Phenotypes for gene: POLR3A were changed from Leukodystrophy, hypomyelinating, 7, with or without oligodontia and/or hypogonadotropic hypogonadism, MIM# 607694; Wiedemann-Rautenstrauch syndrome, MIM# 264090; Susceptibility to severe VZV infection to Leukodystrophy, hypomyelinating, 7, with or without oligodontia and/or hypogonadotropic hypogonadism, MIM# 607694; Wiedemann-Rautenstrauch syndrome, MIM# 264090; Susceptibility to severe VZV infection; POLR3A-related spastic ataxia
Mendeliome v0.6878 FLII Zornitza Stark changed review comment from: Two unrelated families reported with homozygous missense variants. Emerging evidence.
Sources: Literature; to: Two unrelated families reported with homozygous missense variants. Emerging evidence: aware of two more families.
Sources: Literature
Mendeliome v0.6876 POLR3A Elena Savva commented on gene: POLR3A: c.1909+22G>A is a recurring variant that results in a leaky splice site

Bi-allelic variants associated with Leukodystrophy and with Wiedemann-Rautenstrauch syndrome; note association between mono-allelic variants and susceptibility to severe VZV infection.

Deep intronic variants commonly pathogenic

No clear gen-phen correlation
Mendeliome v0.6876 POLR3A Elena Savva reviewed gene: POLR3A: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 31637490; Phenotypes: Leukodystrophy, hypomyelinating, 7, with or without oligodontia and/or hypogonadotropic hypogonadism MIM#607694, Wiedemann-Rautenstrauch syndrome MIM#264090, POLR3A-related spastic ataxia; Mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal; Current diagnostic: yes
Mendeliome v0.6876 FLII Elena Savva reviewed gene: FLII: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 32870709, 11971982, 32980309; Phenotypes: Dilated cardiomyopathy; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal; Current diagnostic: yes
Mendeliome v0.6868 MED12 Zornitza Stark Mode of inheritance for gene: MED12 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6863 MED12 Elena Savva reviewed gene: MED12: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 33244166, 32174975, 30006928, 27312080; Phenotypes: Ohdo syndrome, X-linked MIM#300895, Lujan-Fryns syndrome MIM#309520, Opitz-Kaveggia syndrome MIM#305450; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6860 SLC35A2 Zornitza Stark Phenotypes for gene: SLC35A2 were changed from to Congenital disorder of glycosylation, type IIm (MIM #300896) 30817854; Mild malformation of cortical development with oligodendroglial hyperplasia in epilepsy (MOGHE)
Mendeliome v0.6858 SLC35A2 Zornitza Stark Mode of inheritance for gene: SLC35A2 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6857 SLC35A2 Zornitza Stark reviewed gene: SLC35A2: Rating: GREEN; Mode of pathogenicity: None; Publications: 23561849, 24115232, 27743886, 25778940, 33407896; Phenotypes: Congenital disorder of glycosylation, type IIm (MIM #300896) 30817854, Mild malformation of cortical development with oligodendroglial hyperplasia in epilepsy (MOGHE); Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6848 CHRDL1 Zornitza Stark Mode of inheritance for gene: CHRDL1 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6847 CHRDL1 Zornitza Stark reviewed gene: CHRDL1: Rating: GREEN; Mode of pathogenicity: None; Publications: 25093588; Phenotypes: Megalocornea OMIM# 309300; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6843 DM2 Bryony Thompson STR: DM2 was added
STR: DM2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for STR: DM2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for STR: DM2 were set to 20301639; 29325606
Phenotypes for STR: DM2 were set to Myotonic dystrophy 2 MIM#602668
Review for STR: DM2 was set to GREEN
STR: DM2 was marked as clinically relevant
Added comment: HGVS nomenclature: NM_003418.4:c.-14-833_-14-830[X]
Toxic gain of function RNA expected mechanism of disease
Normal: ≤30 uninterrupted CCTG repeats, 11-26 CCTG repeats with any GCTC or TCTG interruptions
Unknown significance (normal vs. mutable): 27-29 CCTG repeats
Mutable normal (premutation) alleles. ~30-~54 CCTG repeats
Unknown significance (premutation vs pathogenic): ~55-74 CCTG repeats
Pathogenic: ~75-11,000 CCTG repeats
Sources: Expert list
Mendeliome v0.6840 DM1 Bryony Thompson STR: DM1 was added
STR: DM1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for STR: DM1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for STR: DM1 were set to 20301344; 29325606
Phenotypes for STR: DM1 were set to Myotonic dystrophy 1 MIM#160900
Review for STR: DM1 was set to GREEN
STR: DM1 was marked as clinically relevant
Added comment: HGVS nomenclature: NM_001081560.2:c.*224_*226CTG[X]
RNA toxic gain of function is mechanism of disease
Premutation: 35-49 repeats, no clinical signs
Mild: 50-~150 repeats, age of onset 20-70 yrs, clinical signs - cataracts, mild myotonia
Classic: ~100-~1,000 repeats, age of onset 10-30 yrs, clinical signs - weakness, myotonia, cataracts, balding, cardiac arrhythmia
Congenital: >1,000 repeats, age of onset birth-10 yrs , clinical signs - infantile hypotonia, respiratory deficits, intellectual disability, classic signs in adults
Sources: Expert list
Mendeliome v0.6822 SCA7 Bryony Thompson STR: SCA7 was added
STR: SCA7 was added to Mendeliome. Sources: Expert list
Mode of inheritance for STR: SCA7 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for STR: SCA7 were set to 29325606; 20301433
Phenotypes for STR: SCA7 were set to Spinocerebellar ataxia 7 MIM#164500
Review for STR: SCA7 was set to GREEN
STR: SCA7 was marked as clinically relevant
Added comment: NM_000333​.3:c.89_91AGC[X]
Gain of function mechanism of disease
Normal: ≤27 repeats
Mutable normal: 28-33 repeats, meiotically unstable, but not associated with an abnormal phenotype.
Pathogenic reduced penetrance: 34-36 repeats, when manifestations occur, they are more likely to be later onset and milder than average
Pathogenic full penetrance: 37-460 repeats
Sources: Expert list
Mendeliome v0.6816 SCA2 Bryony Thompson STR: SCA2 was added
STR: SCA2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for STR: SCA2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for STR: SCA2 were set to 29325606; 20301452
Phenotypes for STR: SCA2 were set to Spinocerebellar ataxia 2 MIM#183090
Review for STR: SCA2 was set to GREEN
STR: SCA2 was marked as clinically relevant
Added comment: NM_002973​.3:c.496_498CAG[X]
Toxic protein aggregation is mechanism of disease
Benign: ≤31 repeats (homozygous 31/31 repeats reported for recessive SCA2)
Uncertain: 32 repeats
ALS risk allele: 30-32 repeats
Reduced penetrance: 33-34 repeats, may not develop symptoms or only very late in life
Full penetrance: ≥35 repeats
Interruption of a CAG expanded allele by a CAA repeat does not mitigate the pathogenicity of the repeat size, but may enhance the meiotic stability of the repeat
Sources: Expert list
Mendeliome v0.6801 FLII Zornitza Stark gene: FLII was added
gene: FLII was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FLII was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FLII were set to 32870709
Phenotypes for gene: FLII were set to Dilated cardiomyopathy
Review for gene: FLII was set to AMBER
Added comment: Two unrelated families reported with homozygous missense variants. Emerging evidence.
Sources: Literature
Mendeliome v0.6799 RHBDF1 Zornitza Stark gene: RHBDF1 was added
gene: RHBDF1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RHBDF1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RHBDF1 were set to 32870709
Phenotypes for gene: RHBDF1 were set to Dilated cardiomyopathy
Review for gene: RHBDF1 was set to AMBER
Added comment: Three families reported with homozygous variants in this gene and onset of DCM in infancy/childhood. Two of the families had the same truncating variant, indicative of founder effect, and one family had a homozygous missense variant.
Sources: Literature
Mendeliome v0.6797 MYLK3 Zornitza Stark gene: MYLK3 was added
gene: MYLK3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MYLK3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: MYLK3 were set to 29235529; 31244672; 32213617; 32870709
Phenotypes for gene: MYLK3 were set to Dilated cardiomyopathy
Review for gene: MYLK3 was set to AMBER
Added comment: Two families reported with mono-allelic variants (one extension, one frameshift), and three consanguineous families reported with bi-allelic variants (two hmz frameshift, one hmz missense). Supportive mouse models.
Sources: Literature
Mendeliome v0.6795 NRAP Zornitza Stark gene: NRAP was added
gene: NRAP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NRAP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NRAP were set to 33534821; 30384889; 28611399; 32870709
Phenotypes for gene: NRAP were set to Dilated cardiomyopathy
Review for gene: NRAP was set to GREEN
Added comment: Twenty unrelated families reported with childhood onset DCM.
Sources: Literature
Mendeliome v0.6793 MPEG1 Zornitza Stark gene: MPEG1 was added
gene: MPEG1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MPEG1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MPEG1 were set to 33224153; 33692780; 28422754
Phenotypes for gene: MPEG1 were set to Immunodeficiency 77, MIM# 619223
Review for gene: MPEG1 was set to GREEN
Added comment: Immunodeficiency-77 (IMD77) is an immunologic disorder characterized by recurrent and persistent polymicrobial infections with multiple unusual organisms. Skin and pulmonary infections are the most common, consistent with increased susceptibility to epithelial cell infections. The age at onset is highly variable: some patients have recurrent infections from childhood, whereas others present in late adulthood. The limited number of reported patients are all female, suggesting incomplete penetrance or a possible sex-influenced trait. Patient cells, mainly macrophages, show impaired killing of intracellular bacteria and organisms, including nontubercular mycobacteria, although there is also impaired killing of other organisms, such as Pseudomonas, Candida, and Aspergillus.

Four individuals reported, functional data, including animal model.
Sources: Expert list
Mendeliome v0.6785 CSPP1 Zornitza Stark changed review comment from: More than 20 unrelated families reported.; to: More than 20 unrelated families reported. Classically associated with Joubert syndrome; however, note 4 individuals reported with features consistent with Jeune asphyxiating thoracic dystrophy, including short ribs, bell-shaped chest, and pulmonary hypoplasia.
Mendeliome v0.6769 ALDH1L2 Naomi Baker gene: ALDH1L2 was added
gene: ALDH1L2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ALDH1L2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ALDH1L2 were set to PMID: 31341639; 33168096
Phenotypes for gene: ALDH1L2 were set to pruritic ichthyosis, severe diffuse hypomyelination seen on MRI, and abnormal lipid peaks
Review for gene: ALDH1L2 was set to RED
Added comment: Individual reported with bialleleic ALDH1L2 variants (non-canonical splice and a frameshift mutation), who also has a de novo hemizygous RPS6KA3 frameshift mutation. Authors state that not all features of the individual could be explained by the RPS6KA3 variant, and that consideration of Coffin-Lowry sysndrome was only made after identification of the RPS6KA3 variant. Therefore individual has there is a blended phenotype of Coffin–Lowry syndrome and Sjögren–Larsson syndrome. From functional studies authors propose that the ALDH1L2 loss induces mitochondrial dysfunction due to reduced NADPH and increased oxidative stress (PMID: 31341639). Knockout mouse model was viable and did not show an apparent phenotype, however metabolomic analysis showed vastly changed metabotypes in the liver and plasma in these mice suggesting channeling of fatty acids away from β-oxidation. Authors therefore postulate that the role of ALDH1L2 in the lipid metabolism explains why the loss of this enzyme is associated with neuro-cutaneous disease.
Sources: Literature
Mendeliome v0.6763 TAOK2 Bryony Thompson gene: TAOK2 was added
gene: TAOK2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TAOK2 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: TAOK2 were set to 28385331; 29467497
Phenotypes for gene: TAOK2 were set to Generalized verrucosis; abnormal T cell activation
Review for gene: TAOK2 was set to AMBER
Added comment: PMID: 28385331 - A single consanguineous family with generalized verrucosis and abnormal T cell activation, and a homozygous missense (p.R700C), with some assays on patient fibroblasts.
PMID: 29467497 - One of the several genes in the 16p11.2 microdeletion region associated with autism. Taok2 heterozygous and knockout mice had gene dosage-dependent impairments in cognition, anxiety, social interaction, brain size, and neural connectivity. 3 de novo variants and 3 predicted loss of function variants identified in 6 unrelated autism cases. 2 of the de novo variants have supporting functional assays, but 1 of them co-occurs in an individual with a CHD8 frameshift. 1 of the predicted loss of function variants was also identified in the unaffected father and sibling.
Sources: Literature
Mendeliome v0.6742 UBAP1 Zornitza Stark changed review comment from: PMID 31696996: Five unrelated families reported with childhood-onset HSP. A recurrent two‐base pair deletion (c.426_427delGA, p.K143Sfs*15) in the UBAP1 gene was found in four families, and a similar variant (c.475_476delTT, p.F159*) was detected in a fifth family. The variant was confirmed to be de novo in two families and inherited from an affected parent in two other families. RNA studies performed in lymphocytes from one patient with the de novo c.426_427delGA variant demonstrated escape of nonsense‐mediated decay of the UBAP1 mutant transcript, suggesting the generation of a truncated protein. Both variants identified are predicted to result in truncated proteins losing the capacity of binding to ubiquitinated proteins, hence appearing to exhibit a dominant‐negative effect on the normal function of the endosome‐specific endosomal sorting complexes required for the transport‐I complex.; to: PMID 31696996: Five unrelated families reported with childhood-onset HSP. A recurrent two‐base pair deletion (c.426_427delGA, p.K143Sfs*15) in the UBAP1 gene was found in four families, and a similar variant (c.475_476delTT, p.F159*) was detected in a fifth family. The variant was confirmed to be de novo in two families and inherited from an affected parent in two other families. RNA studies performed in lymphocytes from one patient with the de novo c.426_427delGA variant demonstrated escape of nonsense‐mediated decay of the UBAP1 mutant transcript, suggesting the generation of a truncated protein. Both variants identified are predicted to result in truncated proteins losing the capacity of binding to ubiquitinated proteins, hence appearing to exhibit a dominant‐negative effect on the normal function of the endosome‐specific endosomal sorting complexes required for the transport‐I complex.

PMID 32934340: additional 7 families. Median age of onset 10yrs.
Mendeliome v0.6725 COPB1 Zornitza Stark gene: COPB1 was added
gene: COPB1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: COPB1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COPB1 were set to 33632302
Phenotypes for gene: COPB1 were set to Severe intellectual disability; variable microcephaly; cataracts
Review for gene: COPB1 was set to AMBER
Added comment: Two unrelated families, some supportive functional data.
Sources: Literature
Mendeliome v0.6703 ARPC1B Zornitza Stark Phenotypes for gene: ARPC1B were changed from to Platelet abnormalities with eosinophilia and immune-mediated inflammatory disease 617718
Mendeliome v0.6700 ARPC1B Zornitza Stark reviewed gene: ARPC1B: Rating: GREEN; Mode of pathogenicity: None; Publications: 28368018, 33679784; Phenotypes: Platelet abnormalities with eosinophilia and immune-mediated inflammatory disease 617718; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6699 KIDINS220 Zornitza Stark edited their review of gene: KIDINS220: Added comment: Note additional family with severe prenatal phenotype and bi-allelic variants reported in PMID 32909676, so total of 3 unrelated families for bi-allelic fetal phenotype.; Changed publications: 27005418, 32909676
Mendeliome v0.6699 KDM5C Zornitza Stark changed review comment from: Progressive lower limb spasticity is a feature of this ID syndrome. More than 5 unrelated families reported.; to: Intellectual disability, progressive lower limb spasticity, epilepsy and a number of other more variable features. Affected females reported PMID 32279304.
Mendeliome v0.6697 KDM5C Zornitza Stark Mode of inheritance for gene: KDM5C was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6696 KDM5C Zornitza Stark reviewed gene: KDM5C: Rating: GREEN; Mode of pathogenicity: None; Publications: 15586325, 32279304; Phenotypes: Mental retardation, X-linked, syndromic, Claes-Jensen type, MIM# 300534, MONDO:0010355; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6693 C12orf65 Zornitza Stark Phenotypes for gene: C12orf65 were changed from to Spastic paraplegia 55, autosomal recessive, MIM#615035; Combined oxidative phosphorylation deficiency 7, MIM# 613559
Mendeliome v0.6690 C12orf65 Zornitza Stark reviewed gene: C12orf65: Rating: GREEN; Mode of pathogenicity: None; Publications: 23188110, 24080142, 24198383, 20598281, 32808965, 32478789, 28804760; Phenotypes: Spastic paraplegia 55, autosomal recessive, MIM#615035, Combined oxidative phosphorylation deficiency 7, MIM# 613559; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6690 C19orf12 Zornitza Stark Phenotypes for gene: C19orf12 were changed from to Neurodegeneration with brain iron accumulation 4, MIM# 614298; Spastic paraplegia 43, autosomal recessive, MIM# 615043
Mendeliome v0.6687 C19orf12 Zornitza Stark reviewed gene: C19orf12: Rating: GREEN; Mode of pathogenicity: None; Publications: 33688131, 21981780, 22508347, 23269600, 31804703, 30088953, 20039086; Phenotypes: Neurodegeneration with brain iron accumulation 4, MIM# 614298, Spastic paraplegia 43, autosomal recessive, MIM# 615043; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.6684 CYP2U1 Zornitza Stark edited their review of gene: CYP2U1: Added comment: SPG56 is an autosomal recessive neurodegenerative disorder characterized by early-onset progressive lower-limb spasticity resulting in walking difficulties. Upper limbs are often also affected, and some patients may have a subclinical axonal neuropathy. Onset is typically in the first decade. More than 5 unrelated families reported.; Changed rating: GREEN; Changed publications: 23176821, 32006740, 29034544
Mendeliome v0.6684 IFRD1 Zornitza Stark gene: IFRD1 was added
gene: IFRD1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: IFRD1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IFRD1 were set to 29362493
Phenotypes for gene: IFRD1 were set to Hereditary spastic paraplegia; peripheral neuropathy; ataxia
Review for gene: IFRD1 was set to RED
Added comment: A variant segregated with slowly progressing gait ataxia, pyramidal tract signs and peripheral neuropathy in three siblings from a single Chinese family. No functional analyses of the variant has been conducted. The variant (c.514 A>G, p.I172V) is too common (0.3%) for a dominant condition in the African population in gnomAD.
Sources: Expert Review
Mendeliome v0.6684 IFRD1 Zornitza Stark gene: IFRD1 was added
gene: IFRD1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: IFRD1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IFRD1 were set to 29362493
Phenotypes for gene: IFRD1 were set to Hereditary spastic paraplegia; peripheral neuropathy; ataxia
Review for gene: IFRD1 was set to RED
Added comment: A variant segregated with slowly progressing gait ataxia, pyramidal tract signs and peripheral neuropathy in three siblings from a single Chinese family. No functional analyses of the variant has been conducted. The variant (c.514 A>G, p.I172V) is too common (0.3%) for a dominant condition in the African population in gnomAD.
Sources: Expert Review
Mendeliome v0.6630 PGM1 Zornitza Stark Phenotypes for gene: PGM1 were changed from to Congenital disorder of glycosylation, type It 614921; Glycogen storage disorder XIV
Mendeliome v0.6627 PGM1 Zornitza Stark reviewed gene: PGM1: Rating: GREEN; Mode of pathogenicity: None; Publications: 19625727, 24499211; Phenotypes: Congenital disorder of glycosylation, type It 614921, Glycogen storage disorder XIV; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6589 SIAH1 Arina Puzriakova gene: SIAH1 was added
gene: SIAH1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SIAH1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: SIAH1 were set to 32430360
Phenotypes for gene: SIAH1 were set to Developmental delay; Infantile hypotonia; Dysmorphic features; Laryngomalacia
Review for gene: SIAH1 was set to GREEN
Added comment: - PMID: 32430360 (2021) - Five unrelated individuals with shared features of developmental delay, infantile hypotonia, dysmorphic features and laryngomalacia. All had speech delay and where cognitive assessment was age appropriate individuals exhibited learning difficulties. Trio WES revealed distinct de novo variants in SIAH1. In vitro assays demonstrated that SIAH1 mutants induce loss of Wnt stimulatory activity.
Sources: Literature
Mendeliome v0.6582 SYCP2L Arina Puzriakova gene: SYCP2L was added
gene: SYCP2L was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SYCP2L was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SYCP2L were set to 32303603
Phenotypes for gene: SYCP2L were set to Premature ovarian insufficiency
Review for gene: SYCP2L was set to AMBER
Added comment: - PMID: 32303603 (2021) - Two unrelated individuals with premature ovarian insufficiency and homozygous variants (c.150_151del (p.Ser52Profs*7), c.999A>G (p.Ile333Met)) in SYCP2L.
In vitro assays revealed that mutant SYCP2L proteins induced mislocalisation and reduced expression. Sycp2l knockout mice exhibit accelerated reproductive ageing.
Sources: Literature
Mendeliome v0.6570 CLCN4 Zornitza Stark Mode of inheritance for gene: CLCN4 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6569 CLCN4 Zornitza Stark reviewed gene: CLCN4: Rating: GREEN; Mode of pathogenicity: None; Publications: 27550844; Phenotypes: Raynaud-Claes syndrome, MIM#300114, intellectual disability, epilepsy, autistic features, mood disorders, cerebral white matter changes, progressive appendicular spasticity; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6567 EN1 Zornitza Stark changed review comment from: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype.
Sources: Literature; to: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype.

An additional fourth individual had cerebellar hypoplasia in addition to the skeletal phenotype, and a bi-allelic LoF variant.
Sources: Literature
Mendeliome v0.6566 EN1 Zornitza Stark gene: EN1 was added
gene: EN1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EN1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EN1 were set to 33568816
Phenotypes for gene: EN1 were set to ENDOVE syndrome, limb-only type, MIM# 619217
Review for gene: EN1 was set to GREEN
Added comment: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype.
Sources: Literature
Mendeliome v0.6538 EIF5A Zornitza Stark gene: EIF5A was added
gene: EIF5A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EIF5A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: EIF5A were set to 33547280
Phenotypes for gene: EIF5A were set to Intellectual disability; microcephaly; dysmorphism
Review for gene: EIF5A was set to GREEN
Added comment: 7 unrelated individuals reported with de novo variants in this gene and variable combinations of developmental delay, microcephaly, micrognathia and dysmorphism.
Sources: Literature
Mendeliome v0.6531 PERP Zornitza Stark edited their review of gene: PERP: Added comment: Four families reported with heterozygous variants and Olmsted syndrome-2 (OLMS2), which is characterised by mutilating hyperkeratotic skin lesions, primarily on the palms and soles, but also extending onto dorsal surfaces of the hands and feet and distal extremities. The lesions are progressive, becoming thicker with verrucous fissures on the palms and soles over time. In addition, affected individuals exhibit perioral hyperkeratosis, and may have lesions around other orifices as well, such as the nostrils, perineum, and anus. Most patients also have hyperkeratotic nails and light-colored woolly hair.

Two families reported with bi-allelic variants and Erythrokeratodermia variabilis et progressiva-7 (EKVP7), which is characterised by palmoplantar keratoderma that extends to the dorsal surface of the hands and feet (transgrediens), as well as erythematous annular skin lesions. Pruritis, woolly hair, and dystrophic nails may also be present.; Changed rating: GREEN; Changed publications: 31898316, 30321533, 31361044; Changed phenotypes: Olmsted syndrome 2, MIM# 619208, Erythrokeratodermia variabilis et progressiva 7, MIM# 619209; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.6526 APOO Arina Puzriakova gene: APOO was added
gene: APOO was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: APOO was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Publications for gene: APOO were set to 32439808
Phenotypes for gene: APOO were set to Developmental delay; Lactic acidosis; Muscle weakness; Hypotonia; Repetitive infections; Cognitive impairment; Autistic behaviour
Review for gene: APOO was set to RED
Added comment: - PMID: 32439808 (2021) - Three generation family with c.350T>C variant in APOO, encoding a component of the MICOS complex which plays a role in maintaining inner mitochondrial membrane architecture.
Phenotypes include fatigue and muscle weakness (6/8), learning difficulties and cognitive impairment (4/8), and increased blood lactate (2/8). Four individuals were asymptomatic carriers, including one male (authors indicate variability in female carriers was due to skewed X-inactivation, although skewing studies were inconclusive in some cases). Variability in clinical presentation suggests reduced penetrance or possible contribution of additional factors.
Functional studies showed altered MICOS assembly and abnormalities in mitochondria ultrastructure in patient-derived fibroblasts. Knockdown studies in Drosophila and yeast demonstrated mitochondrial structural and functional deficiencies.
Sources: Literature
Mendeliome v0.6513 SPTAN1 Zornitza Stark changed review comment from: At least 4 unrelated families reported.; to: At least 4 unrelated families reported with DEE phenotype.
Mendeliome v0.6501 PCBD1 Michelle Torres edited their review of gene: PCBD1: Added comment: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes.

PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY; Changed phenotypes: MODY, Hyperphenylalaninemia, BH4-deficient, D 264070
Mendeliome v0.6495 SPEN Chern Lim reviewed gene: SPEN: Rating: GREEN; Mode of pathogenicity: None; Publications: 33596411; Phenotypes: Developmental delay/intellectual disability, autism spectrum disorder, anxiety, aggressive behavior, attention deficit disorder, hypotonia, brain and spine anomalies, congenital heart defects, high/narrow palate, facial dysmorphisms, and obesity/increased BMI; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown; Current diagnostic: yes
Mendeliome v0.6494 PCBD1 Michelle Torres changed review comment from: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes.

PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY; to: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes.

PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY
Mendeliome v0.6490 PCBD1 Michelle Torres changed review comment from: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes with features similar to dominantly inherited HNF1A-diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes.

PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY; to: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes.

PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY
Mendeliome v0.6485 MAST2 Elena Savva gene: MAST2 was added
gene: MAST2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MAST2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: MAST2 were set to PMID: 33465109
Phenotypes for gene: MAST2 were set to Thrombophilia; venous thrombosis
Review for gene: MAST2 was set to RED
Added comment: Single missense identified in a family with venous thrombosis and thrombophilia. Missense variant reviewed by in silicos only. Shown to affect regulation of TFP1 and SERPINE1 gene expression.

RNAi of MAST2 followed by RNAseq showed expression changes in many downstream targets
Sources: Literature
Mendeliome v0.6467 ANKZF1 Bryony Thompson gene: ANKZF1 was added
gene: ANKZF1 was added to Mendeliome. Sources: Other
Mode of inheritance for gene: ANKZF1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ANKZF1 were set to 28302725
Phenotypes for gene: ANKZF1 were set to Infantile-onset inflammatory bowel disease
Review for gene: ANKZF1 was set to AMBER
Added comment: Two unrelated cases (1 homozygous and 1 compound heterozygous), and supporting in vitro and yeast assays indicating that loss-of-function mutations in ANKZF1 result in deregulation of mitochondrial integrity.
Sources: Other
Mendeliome v0.6463 CLTCL1 Bryony Thompson changed review comment from: PMID: 26068709 - Three siblings in a single consanguineous family with congenital insensitivity to pain, inability to feel touch, and cognitive delay and a homozygous rare missense variant (Glu330Lys - no homozygotes in gnomAD v2.1). In vitro functional assays of the variant suggested a deleterious effect on the protein. Additionally cellular assays suggested a role for the gene in neural crest development and in the genesis of pain and touch sensing neurons.

PMID: 29402896 - more in depth functional assays and proteomic analyses suggesting a role for the protein in regulating sensory neuron differentiation in the human peripheral system

Other reports of associations with limited evidence:
PMID: 22511880 - Identified as a candidate gene in an autism study, but the homozygous variant (reported as R125C, but actually R1165C) has 40 homozygotes in gnomAD v2.1. And many of the other compound heterozygous candidate variants in the study are too common in gnomAD v2.1, with many homozygotes present. The missense reported in the pain insensitivity family Glu330Lys was reported with another rare missense variant (Glu1310Lys) in one of the autism cases, but no other phenotype information was provided.

PMID: 31354784 - a single case with infantile spasm reported with compound het missense (Met1316Val & Arg1165Cys), but both are very common in gnomAD v2.1 with 33,000 and 40 homozygotes, respectively.
Sources: Literature; to: PMID: 26068709 - Three siblings in a single consanguineous family with congenital insensitivity to pain, inability to feel touch, and cognitive delay and a homozygous rare missense variant (Glu330Lys - no homozygotes in gnomAD v2.1). In vitro functional assays of the variant suggested a deleterious effect on the protein. Additionally cellular assays suggested a role for the gene in neural crest development and in the genesis of pain and touch sensing neurons.

PMID: 29402896 - more in depth functional assays and proteomic analyses suggesting a role for the protein in regulating sensory neuron differentiation in the human peripheral system.

Other reports of associations with limited evidence:
PMID: 22511880 - Identified as a candidate gene in an autism study, but the homozygous variant (reported as R125C, but actually R1165C) has 40 homozygotes in gnomAD v2.1. And many of the other compound heterozygous candidate variants in the study are too common in gnomAD v2.1, with many homozygotes present. The missense reported in the pain insensitivity family Glu330Lys was reported with another rare missense variant (Glu1310Lys) in one of the autism cases, but no other phenotype information was provided.

PMID: 31354784 - a single case with infantile spasm reported with compound het missense (Met1316Val & Arg1165Cys), but both are very common in gnomAD v2.1 with 33,000 and 40 homozygotes, respectively.
Sources: Literature
Mendeliome v0.6463 CLTCL1 Bryony Thompson gene: CLTCL1 was added
gene: CLTCL1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CLTCL1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CLTCL1 were set to 26068709; 29402896; 22511880; 31354784
Phenotypes for gene: CLTCL1 were set to Congenital insensitivity to pain
Review for gene: CLTCL1 was set to AMBER
Added comment: PMID: 26068709 - Three siblings in a single consanguineous family with congenital insensitivity to pain, inability to feel touch, and cognitive delay and a homozygous rare missense variant (Glu330Lys - no homozygotes in gnomAD v2.1). In vitro functional assays of the variant suggested a deleterious effect on the protein. Additionally cellular assays suggested a role for the gene in neural crest development and in the genesis of pain and touch sensing neurons.

PMID: 29402896 - more in depth functional assays and proteomic analyses suggesting a role for the protein in regulating sensory neuron differentiation in the human peripheral system

Other reports of associations with limited evidence:
PMID: 22511880 - Identified as a candidate gene in an autism study, but the homozygous variant (reported as R125C, but actually R1165C) has 40 homozygotes in gnomAD v2.1. And many of the other compound heterozygous candidate variants in the study are too common in gnomAD v2.1, with many homozygotes present. The missense reported in the pain insensitivity family Glu330Lys was reported with another rare missense variant (Glu1310Lys) in one of the autism cases, but no other phenotype information was provided.

PMID: 31354784 - a single case with infantile spasm reported with compound het missense (Met1316Val & Arg1165Cys), but both are very common in gnomAD v2.1 with 33,000 and 40 homozygotes, respectively.
Sources: Literature
Mendeliome v0.6443 SAT1 Bryony Thompson reviewed gene: SAT1: Rating: RED; Mode of pathogenicity: None; Publications: 12215835, 20672378, 9228047; Phenotypes: Keratosis follicularis spinulosa decalvans; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6440 TOGARAM1 Zornitza Stark Phenotypes for gene: TOGARAM1 were changed from Cleft of the lip and palate; Microphthalmia; Cerebral dysgenesis; Hydrocephalus to Joubert syndrome 37, MIM# 619185
Mendeliome v0.6419 ASCC3 Bryony Thompson gene: ASCC3 was added
gene: ASCC3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ASCC3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ASCC3 were set to 21937992; https://doi.org/10.1016/j.xhgg.2021.100024
Phenotypes for gene: ASCC3 were set to Neuromuscular syndrome; congenital myopathy
Review for gene: ASCC3 was set to GREEN
Added comment: 11 individuals from 7 unrelated families with homozygous (missense) or compound heterozygous variants (missense with a presumed LoF variant or 2 missense, no biallelic LoF) with a neurologic phenotype that ranges from severe developmental delay to muscle fatigue.
Sources: Literature
Mendeliome v0.6394 SHROOM3 Zornitza Stark gene: SHROOM3 was added
gene: SHROOM3 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: SHROOM3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SHROOM3 were set to 32621286
Phenotypes for gene: SHROOM3 were set to Anencephaly; cleft lip and palate
Review for gene: SHROOM3 was set to AMBER
Added comment: Animal model and other functional data link SHROOM3 to neural tube development. Single family reported with bi-allelic LoF in a fetus with anencephaly and CL/P.
Sources: Expert Review
Mendeliome v0.6390 MSL3 Zornitza Stark Mode of inheritance for gene: MSL3 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6389 MSL3 Zornitza Stark reviewed gene: MSL3: Rating: GREEN; Mode of pathogenicity: None; Publications: 33173220; Phenotypes: Basilicata-Akhtar syndrome, OMIM # 301032; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6377 ITPR1 Zornitza Stark changed review comment from: Gillespie syndrome is usually diagnosed in the first year of life by the presence of fixed dilated pupils in a hypotonic infant. Affected individuals have a characteristic form of iris hypoplasia in which the pupillary border of the iris exhibits a scalloped or 'festooned' edge, with iris strands extending onto the anterior lens surface at regular intervals. The key extraocular features of Gillespie syndrome are congenital hypotonia, progressive cerebellar hypoplasia, and ataxia, as well as variable cognitive impairment that is usually mild. Multiple families reported with bi-allelic or de novo heterozygous variants.; to: Gillespie syndrome: usually diagnosed in the first year of life by the presence of fixed dilated pupils in a hypotonic infant. Affected individuals have a characteristic form of iris hypoplasia in which the pupillary border of the iris exhibits a scalloped or 'festooned' edge, with iris strands extending onto the anterior lens surface at regular intervals. The key extraocular features of Gillespie syndrome are congenital hypotonia, progressive cerebellar hypoplasia, and ataxia, as well as variable cognitive impairment that is usually mild. Multiple families reported with bi-allelic or de novo heterozygous variants.
Mendeliome v0.6324 IGSF1 Zornitza Stark Mode of inheritance for gene: IGSF1 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6323 IGSF1 Zornitza Stark reviewed gene: IGSF1: Rating: GREEN; Mode of pathogenicity: None; Publications: 27310681, 30086211, 24108313, 26840047, 27762734, 23143598; Phenotypes: Hypothyroidism, central, and testicular enlargement, MIM# 300888; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.6321 FCHO1 Zornitza Stark Phenotypes for gene: FCHO1 were changed from Combined immunodeficiency; T cells: low, poor proliferation; B cells: normal number; Recurrent infections (viral, mycobacteria, bacterial, fungal); lymphoproliferation; Failure to thrive; Increased activation-induced T-cell death; Defective clathrin-mediated endocytosis to Immunodeficiency 76, MIM# 619164; Combined immunodeficiency; T cells: low, poor proliferation; B cells: normal number; Recurrent infections (viral, mycobacteria, bacterial, fungal); lymphoproliferation; Failure to thrive; Increased activation-induced T-cell death; Defective clathrin-mediated endocytosis
Mendeliome v0.6320 FCHO1 Zornitza Stark edited their review of gene: FCHO1: Changed phenotypes: Immunodeficiency 76, MIM# 619164, Combined immunodeficiency, T cells: low, poor proliferation, B cells: normal number, Recurrent infections (viral, mycobacteria, bacterial, fungal), lymphoproliferation, Failure to thrive, Increased activation-induced T-cell death, Defective clathrin-mediated endocytosis
Mendeliome v0.6320 FSTL5 Eleanor Williams gene: FSTL5 was added
gene: FSTL5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FSTL5 was set to Unknown
Publications for gene: FSTL5 were set to 33105483
Phenotypes for gene: FSTL5 were set to isolated club-foot; iTEV; Talipes equinovarus
Review for gene: FSTL5 was set to RED
Added comment: PMID: 33105483 - Khanshour et al 20201 - GWAS study of isolated Talipes equinovarus (clubfoot, iTEV) identified an associated locus within FSTL5. They show that Fstl5 is expressed in the embryonic hindlimb in bats, chicks and mice. However, Fstl5 was expressed more highly in neural tissues in mice, and rats lacking Fstl5 showed no gross developmental malformations. Conditional overexpression of Fstl5 in osteochondroprogenitors resulted in sexually dimorphic differences in skeletal development in mice.
Sources: Literature
Mendeliome v0.6320 NCOA3 Eleanor Williams gene: NCOA3 was added
gene: NCOA3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NCOA3 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: NCOA3 were set to 33326993
Phenotypes for gene: NCOA3 were set to non-syndromic hearing loss
Review for gene: NCOA3 was set to RED
Added comment: PMID: 33326993 - Salazar da Silva et al 2020 - report a 5 generation Brazilian family with 15 individuals with non-syndromic, bilateral and progressive hearing loss. Using linkage analysis and then exome sequencing they identified a heterozygous variant in NCOA3 (NM_181659, c.2810C > G; p.Ser937Cys) that was found in the 7 analysed affected individuals. It was also found in 4 unaffected individuals but they are within the range of onset of hearing loss observed in the family. Expression of nco3 was found in the inner ear of mice and zebrafish. ncoa3-/- zebrafish showed subtle alterations in cartilage, mineral density and abnormal adult swimming behaviour, which may suggest the mechanism of pathogenicity.
Sources: Literature
Mendeliome v0.6314 CFHR3 Elena Savva reviewed gene: CFHR3: Rating: AMBER; Mode of pathogenicity: None; Publications: PMID:32424742; Phenotypes: {Hemolytic uremic syndrome, atypical, susceptibility to} MIM#235400, {Macular degeneration, age-related, reduced risk of} MIM#603075; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.6314 CFHR1 Elena Savva reviewed gene: CFHR1: Rating: AMBER; Mode of pathogenicity: None; Publications: PMID:32424742; Phenotypes: {Hemolytic uremic syndrome, atypical, susceptibility to} MIM#235400, {Macular degeneration, age-related, reduced risk of} MIM#603075; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.6297 SHPK Bryony Thompson gene: SHPK was added
gene: SHPK was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SHPK was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SHPK were set to 25647543; 27604308
Phenotypes for gene: SHPK were set to Sedoheptulokinase deficiency MIM#617213
Review for gene: SHPK was set to AMBER
Added comment: 2 unrelated cases reported, with elevated excretion of erythritol and sedoheptulose, and each had a homozygous nonsense variant. The first patient presented with neonatal cholestasis, hypoglycemia, and anemia, while the second patient presented with congenital arthrogryposis multiplex, multiple contractures, and dysmorphisms. Due to inconsistency in phenotypes, likely SHPK deficiency is a benign disorder.
Sources: Literature
Mendeliome v0.6295 PNLIP Bryony Thompson gene: PNLIP was added
gene: PNLIP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PNLIP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PNLIP were set to 31977950; 25862608; 24262094; 27604308
Phenotypes for gene: PNLIP were set to Pancreatic lipase deficiency MIM#614338; disorders of lipid and lipoprotein metabolism
Review for gene: PNLIP was set to GREEN
Added comment: 4 cases from 2 unrelated families, with supporting biochemical assays in patient cells and cellular-based assays. The cases have decreased absorption of dietary fat and greasy voluminous stools, but apparent normal development and an overall good state of health.
Sources: Literature
Mendeliome v0.6237 SC5D Zornitza Stark Phenotypes for gene: SC5D were changed from to Lathosterolosis, MIM# 607330
Mendeliome v0.6234 SC5D Zornitza Stark reviewed gene: SC5D: Rating: GREEN; Mode of pathogenicity: None; Publications: 17853487, 12189593, 12812989, 24142275; Phenotypes: Lathosterolosis, MIM# 607330; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6231 SLC46A1 Zornitza Stark Phenotypes for gene: SLC46A1 were changed from to Folate malabsorption, hereditary, MIM# 229050
Mendeliome v0.6228 SLC46A1 Zornitza Stark changed review comment from: Hereditary folate malabsorption is an autosomal recessive disorder characterized by signs and symptoms of folate deficiency that appear within a few months after birth. Infants exhibit low blood and cerebrospinal fluid folate levels with megaloblastic anemia, diarrhea, immune deficiency, infections, and neurologic deficits. Treatment with folate supplementation results in resolution of the signs and symptoms. The disorder is caused by impaired intestinal folate absorption and impaired transport of folate into the central nervous system. More than 5 unrelated families reported.; to: Hereditary folate malabsorption is an autosomal recessive disorder characterized by signs and symptoms of folate deficiency that appear within a few months after birth. Infants exhibit low blood and cerebrospinal fluid folate levels with megaloblastic anemia, diarrhoea, immune deficiency, infections, and neurologic deficits. Treatment with folate supplementation results in resolution of the signs and symptoms. The disorder is caused by impaired intestinal folate absorption and impaired transport of folate into the central nervous system. More than 5 unrelated families reported.
Mendeliome v0.6228 SLC46A1 Zornitza Stark reviewed gene: SLC46A1: Rating: GREEN; Mode of pathogenicity: None; Publications: 17446347, 17129779, 21333572; Phenotypes: Folate malabsorption, hereditary, MIM# 229050; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6221 DDX58 Zornitza Stark edited their review of gene: DDX58: Added comment: Prasov et al. 2021 (PMID: 33495304) - A heterozygous DDX58 variant (c.1529A>T) was identified in 5 individuals from 2 unrelated families from different ethnic backgrounds. Phenotypes varied with some being severely affected by systemic features and others solely with glaucoma.Functional analysis demonstrated the variant confers a dominant gain-of-function effect on interferon activity.; Changed mode of pathogenicity: Other; Changed publications: 25620203, 33495304
Mendeliome v0.6215 SIX1 Zornitza Stark changed review comment from: DEFINITIVE by ClinGen. Variable expressivity, some families reported with isolated deafness, however this likely represents a spectrum rather than a separate disorder.; to: Deafness/BOS: DEFINITIVE by ClinGen. Variable expressivity, some families reported with isolated deafness, however this likely represents a spectrum rather than a separate disorder.
Mendeliome v0.6207 EGFR Eleanor Williams changed review comment from: PMID: 33326033 - Akhavanfard et al 2020 - identified a heterozygous germline variant in EGFR (c.3238 G>A, p.Asp1080Asn) in a 21 year old female with metastatic bilateral Adrenocortical carcinoma (ACC). Then they analyzed germline exome data from 21 children, 32 adolescents and young adults (15-39y), and 60 adult participants with ACC. 3.5% of all 113 ACC cases had at least a highly prioritized VUS germline EGFR variant, compared to only 0.3% in a non-TCGA (The Cancer Genome Atlas) ExAC control group (P < 0.0001). No segregation data.; to: PMID: 33326033 - Akhavanfard et al 2020 - identified a heterozygous germline variant in EGFR (c.3238 G>A, p.Asp1080Asn) in a 21 year old female with metastatic bilateral Adrenocortical carcinoma (ACC). Then they analyzed germline exome data from 21 children, 32 adolescents and young adults (15-39y), and 60 adult participants with ACC. 3.5% of all 113 ACC cases had at least a highly prioritized VUS germline EGFR variant, compared to only 0.3% in a non-TCGA (The Cancer Genome Atlas) ExAC control group (P < 0.0001). In the adolescents and young adults group 6.2% had ECGR variants. No segregation data.
Mendeliome v0.6207 WBP11 Eleanor Williams gene: WBP11 was added
gene: WBP11 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: WBP11 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: WBP11 were set to 33276377
Phenotypes for gene: WBP11 were set to malformation syndrome affecting the cardiac, skeletal, gastrointestinal and renal systems
Review for gene: WBP11 was set to GREEN
Added comment: PMID: 33276377 - Martin et al 2020 - report 13 affected individuals from 7 unrelated families identified through various different cohort analysis (vertebral malformation, renal hypodysplasia, syndromic esophageal atresia, multiple congenital anomalies) in whom a WBP11 heterozygous variant is considered the top causative candidate. 5 identified variants were predicted to be protein truncating whilst the 6th was a missense variant. All variants are absent from population databases. In family 1, the variant was inherited from the apparently unaffected mother, indicating reduced penetrance, and phenotypic variance within families was observed. Phenotypes covered cardiac, vertebral, renal, craniofacial and gastrointestinal systems. At least at least 5 of the patients affected had features in three component organs so can be considered a VACTERL association. Wbp11 heterozygous null mice had vertebral and renal anomalies.
Sources: Literature
Mendeliome v0.6192 SLC7A6OS Zornitza Stark gene: SLC7A6OS was added
gene: SLC7A6OS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SLC7A6OS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC7A6OS were set to 33085104
Phenotypes for gene: SLC7A6OS were set to Progressive myoclonus epilepsy
Review for gene: SLC7A6OS was set to RED
Added comment: Two unrelated families reported with same homozygous splice site variant, shared haplotype (founder effect). Limited functional data.
Sources: Literature
Mendeliome v0.6190 TLR8 Zornitza Stark gene: TLR8 was added
gene: TLR8 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TLR8 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: TLR8 were set to 33512449
Phenotypes for gene: TLR8 were set to Immunodeficiency; bone marrow failure
Mode of pathogenicity for gene: TLR8 was set to Other
Review for gene: TLR8 was set to GREEN
Added comment: Six unrelated males reported with a phenotype comprising neutropaenia, infections, lymphoproliferation, humoral immune defects, and in some cases bone marrow failure. Three different variants reported, the variant was somatic in 5/6 individuals. GoF mechanism demonstrated.
Sources: Literature
Mendeliome v0.6187 PIGF Paul De Fazio changed review comment from: The same homozygous missense variant identified in 2 individuals from different families from the same region of India. Individuals had a phenotype similar to DOORS syndrome without deafness. Impaired glycosylphosphatidylinositol (GPI) biosynthesis was demonstrated.

Rated Red as the two families are likely to be related (founder mutation?).
Sources: Literature; to: The same homozygous missense variant identified in 2 individuals from different families from the same region of India. Individuals had a phenotype similar to DOORS syndrome without deafness - only one of the two had seizures (GTCS), the other was 14mo and noted to have tonic posturing.

Impaired glycosylphosphatidylinositol (GPI) biosynthesis was demonstrated by flow cytometry and a rescue assay. Alkaline phosphatase in both individuals was normal.

Rated Red as the two families are likely to be related (founder mutation?).
Sources: Literature
Mendeliome v0.6187 PIGF Paul De Fazio changed review comment from: The same missense variant identified in 2 individuals from different families from the same region of India. Individuals had a phenotype similar to DOORS syndrome without deafness. Impaired glycosylphosphatidylinositol (GPI) biosynthesis was demonstrated.

Rated Red as the two families are likely to be related (founder mutation?).
Sources: Literature; to: The same homozygous missense variant identified in 2 individuals from different families from the same region of India. Individuals had a phenotype similar to DOORS syndrome without deafness. Impaired glycosylphosphatidylinositol (GPI) biosynthesis was demonstrated.

Rated Red as the two families are likely to be related (founder mutation?).
Sources: Literature
Mendeliome v0.6187 PIGF Paul De Fazio changed review comment from: Identified in 2 individuals with a phenotype similar to DOORS (syndrome
Sources: Literature; to: The same missense variant identified in 2 individuals from different families from the same region of India. Individuals had a phenotype similar to DOORS syndrome without deafness. Impaired glycosylphosphatidylinositol (GPI) biosynthesis was demonstrated.

Rated Red as the two families are likely to be related (founder mutation?).
Sources: Literature
Mendeliome v0.6187 BRWD1 Paul De Fazio gene: BRWD1 was added
gene: BRWD1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: BRWD1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: BRWD1 were set to 33389130
Phenotypes for gene: BRWD1 were set to Asthenoteratozoospermia, likely primary ciliary dyskinesia
Review for gene: BRWD1 was set to GREEN
gene: BRWD1 was marked as current diagnostic
Added comment: Biallelic missense variants reported in 3 unrelated individuals. Apart from asthenoteratozoospermia, all 3 had PCD or "PCD-likely" symptoms of re-occurring airway infections, bronchiectasis, and rhinosinusitis. One individual had situs inversus. Studies on cells from one indivdidual showed abnormal respiratory cilia structure. BRWD1 staining was absent from respiratory cilia in this individual (present in controls).

Rated Green as there are three unrelated individuals reported.
Sources: Literature
Mendeliome v0.6184 HIRA Paul De Fazio gene: HIRA was added
gene: HIRA was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: HIRA was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: HIRA were set to 33417013; 28135719; 25363760
Phenotypes for gene: HIRA were set to Neurodevelopmental disorder
Review for gene: HIRA was set to GREEN
gene: HIRA was marked as current diagnostic
Added comment: Two unrelated patients with different de novo loss of function variants identified in PMID 33417013:

Individual 1: intragenic deletion, phenotype included psychomotor retardation, ID, growth retardation, microcephaly, and facial features reminiscent of 22q deletion syndrome.
Individual 2: canonical splice variant, phenotype mostly confined to ASD

Another two de novo variants were identified in the literature by the authors of that paper, one stop-gain (DDD study, PMID 28135719) and one missense (large autism cohort, PMID 25363760).

PMID 33417013 also showed that HIRA knockdown in mice results in neurodevelopmental abnormalities.

Rated Green due to 4 unrelated individuals (albeit 2 in large cohort studies) and a mouse model. NB: HIRA is within the common 22q deletion region.
Sources: Literature
Mendeliome v0.6181 CFAP47 Zornitza Stark Added comment: Comment when marking as ready: 3-4 unrelated individuals and animal model.
Mendeliome v0.6179 EYA3 Paul De Fazio gene: EYA3 was added
gene: EYA3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EYA3 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: EYA3 were set to 33475861
Phenotypes for gene: EYA3 were set to Oculo-auriculo-vertebral spectrum (OAVS)
Review for gene: EYA3 was set to RED
gene: EYA3 was marked as current diagnostic
Added comment: 3 individuals with OAVS from two unrelated families with the same missense variant, p.(Asn358Ser). Variant has 20 heterozygotes in gnomAD. Unaffected carriers in both families were also identified - unknown if incomplete penetrance or nonsegregation.

Functional studies indicate the variant increases protein half life, and gene knockdown in zebrafish had an effect on craniofacial development.

Rated Red due to both families sharing the variant and uncertainty about incomplete penetrance versus nonsegregation.
Sources: Literature
Mendeliome v0.6172 BCAT2 Bryony Thompson changed review comment from: A single case reported with compound heterozygous variants with functional studies demonstrating that the two variants resulted in decreased BCAT2 enzyme activity. Also, a null mouse model has a phenotype similar to human maple syrup urine disease.
Sources: NHS GMS; to: 6 cases from 5 unrelated families with homozygous or compound heterozygous variant, and supporting functional studies demonstrating decreased BCAT2 enzyme activity for some of the variants. Also, a null mouse model has a phenotype similar to human maple syrup urine disease.
Sources: NHS GMS
Mendeliome v0.6171 CFAP47 Hazel Phillimore gene: CFAP47 was added
gene: CFAP47 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CFAP47 was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Publications for gene: CFAP47 were set to PMID: 33472045
Phenotypes for gene: CFAP47 were set to asthenoteratozoospermia; morphological abnormalities of the flagella (MMAF)
Review for gene: CFAP47 was set to AMBER
Added comment: CFAP47 also known as CXorf22. 3 different missense variants in 3 unrelated Chinese individuals with asthenoteratozoospermia associated with morphological abnormalities of the flagella (MMAF). Immunoblotting and immunofluorescence showed reduced levels of CFAP47 in spermatozoa in all 3 men. A separate asthenoteratozoospermia cohort showed 1 individual with CNV including whole gene deletion of CFAP47.
Mouse model (with frameshift variants generated (via CRISPR-Cas9 technology) were sterile and presented with reduced sperm motility and abnormal flagellar morphology.
Sources: Literature
Mendeliome v0.6171 C14orf39 Elena Savva gene: C14orf39 was added
gene: C14orf39 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: C14orf39 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: C14orf39 were set to PMID: 33508233; 27796301
Phenotypes for gene: C14orf39 were set to Azoospermia; Premature ovarian insufficiency
Review for gene: C14orf39 was set to GREEN
Added comment: PMID: 33508233
- 1 family with two males (azoospermia) and 1 female (premature ovarian insufficiency)
- 2 unrelated Chinese males with azoospermia
All patients had either homozygous PTCs or splice

PMID: 27796301
Mouse K/O had azoospermia and ovarian failure
Sources: Literature
Mendeliome v0.6166 METAP1 Paul De Fazio gene: METAP1 was added
gene: METAP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: METAP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: METAP1 were set to PMID: 32764695
Phenotypes for gene: METAP1 were set to Intellectual disability, aggression, neurodevelopmental delay
Review for gene: METAP1 was set to RED
gene: METAP1 was marked as current diagnostic
Added comment: Biallelic nonsense (NMD-predicted) variant identified in 4 sibs in a consanguineous family with dev delay. One sib had bilateral clinodactyly of her toes and her left 3rd finger, other sibs were not dysmorphic. Rated red due to single consanguineous family.
Sources: Literature
Mendeliome v0.6164 SQOR Zornitza Stark gene: SQOR was added
gene: SQOR was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SQOR was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SQOR were set to 32160317
Phenotypes for gene: SQOR were set to Leigh-like disorder
Review for gene: SQOR was set to AMBER
Added comment: Two unrelated families and some functional data.
Sources: Literature
Mendeliome v0.6162 HYAL2 Zornitza Stark gene: HYAL2 was added
gene: HYAL2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: HYAL2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: HYAL2 were set to 28081210; 23172227; 26515055
Phenotypes for gene: HYAL2 were set to Cleft lip and palate; cor triatriatum; congenital cardiac malformations
Review for gene: HYAL2 was set to AMBER
Added comment: 2 unrelated consanguineous extended families (Amish and Arab) with an orofacial clefting phenotype with cardiac anomalies.
Sources: Literature
Mendeliome v0.6149 NOS1AP Zornitza Stark edited their review of gene: NOS1AP: Added comment: Nephrotic syndrome type 22 (NPHS22) is an autosomal recessive renal disease characterized by onset of progressive kidney dysfunction in infancy. Affected individuals usually present with edema associated with hypoproteinemia, proteinuria, and microscopic hematuria. Renal biopsy shows effacement of the podocyte foot processes, glomerulosclerosis, and thickening of the glomerular basement membrane. The disease is steroid-resistant and progressive, resulting in end-stage renal disease usually necessitating kidney transplant.

Two unrelated families and animal model.

No PMID yet: https://advances.sciencemag.org/content/7/1/eabe1386; Changed rating: GREEN; Changed phenotypes: Nephrotic syndrome, type 22, MIM# 619155; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6147 DCT Zornitza Stark gene: DCT was added
gene: DCT was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: DCT was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DCT were set to 33100333
Phenotypes for gene: DCT were set to Oculocutaneous albinism, type VIII, MIM# 619165
Review for gene: DCT was set to GREEN
Added comment: Two unrelated families reported. Functional data including mouse model.
Sources: Expert list
Mendeliome v0.6141 NDUFC2 Zornitza Stark gene: NDUFC2 was added
gene: NDUFC2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: NDUFC2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NDUFC2 were set to 32969598
Phenotypes for gene: NDUFC2 were set to Mitochondrial complex I deficiency, nuclear type 36, MIM# 619170
Review for gene: NDUFC2 was set to AMBER
Added comment: Mitochondrial complex I deficiency nuclear type 36 (MC1DN36) is an autosomal recessive metabolic disorder characterized by global developmental delay, hypotonia, and failure to thrive apparent from infancy or early childhood. Affected individuals usually do not acquire ambulation, show progressive spasticity, and have impaired intellectual development with absent speech. More variable features may include pale optic discs, poor eye contact, seizures, and congenital heart defects. Laboratory studies show increased serum lactate; metabolic acidosis may occur during stress or infection. Brain imaging shows T2-weighted abnormalities in the basal ganglia and brainstem, consistent with a clinical diagnosis of Leigh syndrome. Two unrelated families reported, some functional data.
Sources: Expert list
Mendeliome v0.6132 DLG1 Zornitza Stark gene: DLG1 was added
gene: DLG1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: DLG1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DLG1 were set to 28926086
Phenotypes for gene: DLG1 were set to Non-syndromic cleft lip and palate
Review for gene: DLG1 was set to RED
Added comment: GWAS study PMID: 28926086 found genome-wide significance for several SNPs within this gene, identifying it as a candidate gene for non-syndromic cleft lip with or without cleft palate.
Sources: Expert list
Mendeliome v0.6131 PLEKHA7 Zornitza Stark Phenotypes for gene: PLEKHA7 were changed from to Cleft lip and palate
Mendeliome v0.6127 PLEKHA7 Zornitza Stark reviewed gene: PLEKHA7: Rating: AMBER; Mode of pathogenicity: None; Publications: 29805042; Phenotypes: Cleft lip and palate; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.6107 CREB3L3 Bryony Thompson gene: CREB3L3 was added
gene: CREB3L3 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: CREB3L3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CREB3L3 were set to 32580631; 29954705; 27982131; 27291420; 26427795; 21666694
Phenotypes for gene: CREB3L3 were set to Hyperlipidaemia; hypertriglyceridemia
Review for gene: CREB3L3 was set to AMBER
Added comment: PMID: 26427795 - a loss of function variant (c.359delG p.K120fsX20) was identified in 2 affected adult siblings and a 13 yo normotriglyceridemic daughter of one of the siblings.
PMID: 21666694 - Lipoprotein profiles of the families of 4 individuals with CREB3L3 nonsense mutations showed a significantly elevated mean plasma TG level in 11 mutation carriers compared with 5 non-carrier first-degree relatives (9.67 ± 4.70 vs. 1.66 ± 0.55 mM, P = 0.021, Wilcoxon test). 3 of those families have the same variant - Lys245GlufsTer130, which has 126 (281,946 alleles) hets in gnomAD v2.1.
PMID: 32580631 - case-control analysis of nonmonogenic severe hypertriglyceridemia cases (N=265) vs normolipidemic controls (N=477), identified 5 cases with LoF variants (3 of whom had the Lys245GlufsTer130 frameshift) and none in controls. OR 20.2 (95% CI 1.11–366.1) p = 0.002, adjusted p = 0.03.
The frequency of Lys245GlufsTer130 is higher than expected for a dominant disorder, but other loss of function variants have been identified. The gene may be associated with variable penetrance. There are multiple supporting null mouse models with hyperlipidaemia.
Sources: Expert list
Mendeliome v0.6102 CBY1 Bryony Thompson gene: CBY1 was added
gene: CBY1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CBY1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CBY1 were set to 33131181; 25103236; 25220153
Phenotypes for gene: CBY1 were set to intellectual disability; cerebellar ataxia; molar tooth sign; polydactyly; Joubert syndrome
Review for gene: CBY1 was set to GREEN
Added comment: Three cases in two unrelated consanguineous families with homozygous loss of function variants. Multiple null model organisms recapitulate the human phenotype: Null mouse model had cystic kidneys, a phenotype common to ciliopathies. Reducing Cby levels in Xenopus laevis model reduced the density of multiciliated cells, the number of basal bodies per multiciliated cell, and the numbers of neural tube primary cilia; it also led to abnormal development of the neural crest, central nervous system, and pronephros. Depletion of cby1 in zebrafish results in ciliopathy‐related phenotypes.
Sources: Literature
Mendeliome v0.6100 ZMYND15 Bryony Thompson gene: ZMYND15 was added
gene: ZMYND15 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZMYND15 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZMYND15 were set to 24431330; 33169450; 20675388
Phenotypes for gene: ZMYND15 were set to Severe oligozoospermia
Review for gene: ZMYND15 was set to GREEN
Added comment: 4 unrelated consanguineous cases with homozygous loss of function variants. Zmynd15-null male mice display reduced testis weight and azoospermia
Sources: Literature
Mendeliome v0.6095 TMEM251 Bryony Thompson gene: TMEM251 was added
gene: TMEM251 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TMEM251 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TMEM251 were set to 33252156
Phenotypes for gene: TMEM251 were set to Dysostosis multiplex‐like skeletal dysplasia; severe short stature
Review for gene: TMEM251 was set to AMBER
Added comment: Two unrelated consanguineous families with homozygous variants (c.133C>T; p.Arg45Trp and c.215dupA; p.Tyr72Ter), with co-segregation data in one family. Preliminary in vitro functional assays conducted - Tmem251 knockdown by small interfering RNA induced dedifferentiation of rat primary chondrocytes.
Sources: Literature
Mendeliome v0.6035 SCAMP5 Zornitza Stark edited their review of gene: SCAMP5: Added comment: PMID 33390987: Four unrelated individuals reported with same de novo missense variant, p. Gly180Trp. The onset age of seizures was ranged from 6 to 15 months. Patients had different types of seizures, including focal seizures, generalized tonic-clonic seizures and tonic seizure. One patient showed typical autism spectrum disorder (ASD) symptoms. Electroencephalogram (EEG) findings presented as focal or multifocal discharges, sometimes spreading to generalization. Brain magnetic resonance imaging (MRI) abnormalities were present in each patient. Severe intellectual disability and language and motor developmental disorders were found in our patients, with all patients having poor language development and were nonverbal at last follow-up. All but one of the patients could walk independently in childhood, but the ability to walk independently in one patient had deteriorated with age. All patients had abnormal neurological exam findings, mostly signs of extrapyramidal system involvement. Dysmorphic features were found in 2/4 patients, mainly in the face and trunk.; Changed publications: 31439720, 33390987
Mendeliome v0.6028 CYLD Zornitza Stark Phenotypes for gene: CYLD were changed from Brooke-Spiegler syndrome, 605041; Cylindromatosis, familial, 132700; Trichoepithelioma, multiple familial, 1, 601606; Frontotemporal dementia and amyotrophic lateral sclerosis to Brooke-Spiegler syndrome, 605041; Cylindromatosis, familial, 132700; Trichoepithelioma, multiple familial, 1, 601606; Frontotemporal dementia and/or amytrophic lateral sclerosis 8, MIM# 619132
Mendeliome v0.6027 CYLD Zornitza Stark reviewed gene: CYLD: Rating: AMBER; Mode of pathogenicity: None; Publications: ; Phenotypes: Frontotemporal dementia and/or amytrophic lateral sclerosis 8, MIM# 619132; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.6022 BCS1L Zornitza Stark edited their review of gene: BCS1L: Changed phenotypes: Bjornstad syndrome, MIM# 262000, Leigh syndrome, MIM# 256000, BCS1L-related mitochondrial disease
Mendeliome v0.6022 MRPS22 Zornitza Stark Phenotypes for gene: MRPS22 were changed from to Combined oxidative phosphorylation deficiency 5 MIM#611719; Ovarian dysgenesis 7 MIM#618117
Mendeliome v0.6019 MRPS22 Elena Savva reviewed gene: MRPS22: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 29566152; Phenotypes: Combined oxidative phosphorylation deficiency 5 MIM#611719, Ovarian dysgenesis 7 MIM#618117; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6018 CELF2 Zornitza Stark gene: CELF2 was added
gene: CELF2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CELF2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CELF2 were set to 33131106
Phenotypes for gene: CELF2 were set to Developmental and epileptic encephalopathy
Review for gene: CELF2 was set to GREEN
Added comment: Five unrelated individuals reported. Four with de novo variants, and one inherited from a mosaic mother. Notably, all identified variants, except for c.272‐1G>C, were clustered within 20 amino acid residues of the C‐terminus, which might be a nuclear localization signal.
Sources: Literature
Mendeliome v0.6016 FGF13 Zornitza Stark gene: FGF13 was added
gene: FGF13 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FGF13 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: FGF13 were set to 33245860
Phenotypes for gene: FGF13 were set to Intellectual disability; epilepsy
Mode of pathogenicity for gene: FGF13 was set to Other
Review for gene: FGF13 was set to GREEN
Added comment: Two sibling pairs and three unrelated males reported who presented in infancy with intractable focal seizures and severe developmental delay.

The variants were located in the N-terminal domain of the A isoform of FGF13/FHF2 (FHF2A). The X-linked FHF2 gene (also known as FGF13) has alternative first exons which produce multiple protein isoforms that differ in their N-terminal sequence. The variants were located at highly conserved residues in the FHF2A inactivation particle that competes with the intrinsic fast inactivation mechanism of Nav channels. Functional characterization of mutant FHF2A co-expressed with wild-type Nav1.6 (SCN8A) revealed that mutant FHF2A proteins lost the ability to induce rapid-onset, long-term blockade of the channel while retaining pro-excitatory properties. These gain-of-function effects are likely to increase neuronal excitability consistent with the epileptic potential of FHF2 variants.
Sources: Literature
Mendeliome v0.6014 SCUBE3 Zornitza Stark changed review comment from: Eighteen affected individuals from nine unrelated families reported with a consistent phenotype characterised by reduced growth, skeletal features, distinctive craniofacial appearance, and dental anomalies.
Sources: Literature; to: Eighteen affected individuals from nine unrelated families reported with a consistent phenotype characterised by reduced growth, skeletal features, distinctive craniofacial appearance, and dental anomalies. Mouse model recapitulated phenotype.
Sources: Literature
Mendeliome v0.6014 SCUBE3 Zornitza Stark gene: SCUBE3 was added
gene: SCUBE3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SCUBE3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SCUBE3 were set to 33308444
Phenotypes for gene: SCUBE3 were set to Short stature; skeletal abnormalities; craniofacial abnormalities; dental anomalies
Review for gene: SCUBE3 was set to GREEN
Added comment: Eighteen affected individuals from nine unrelated families reported with a consistent phenotype characterised by reduced growth, skeletal features, distinctive craniofacial appearance, and dental anomalies.
Sources: Literature
Mendeliome v0.6012 UBR7 Zornitza Stark gene: UBR7 was added
gene: UBR7 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: UBR7 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: UBR7 were set to 33340455
Phenotypes for gene: UBR7 were set to Intellectual disability; epilepsy; hypothyroidism; congenital anomalies; dysmorphic features
Review for gene: UBR7 was set to GREEN
Added comment: Seven individuals from 6 unrelated families. All had developmental delay, and all males had urogenital anomalies, namely cryptorchidism in 5/6 and small penis in 1/6. Six individuals had seizures and hypotonia. Hypothyroidism was present in 4/7 individuals, and ptosis was noted in 6/7 individuals. Five individuals exhibited cardiac abnormalities: two had ventricular septal defect, one had atrial septal defect, one had a patent ductus arteriosus requiring surgery, and the other had a patent ductus arteriosus and a patent foramen ovale that both closed spontaneously. Five individuals had short stature (height < 3rd percentile). Physical examination revealed various dysmorphic features, including prominent forehead (3/7), hypertelorism (4/7), telecanthus (1/7), epicanthus(1/7), downslanting palpebral fissures (3/7), thick eyebrow (1/7), low-set ears (3/7), long philtrum (2/7), unilateral single transverse palmar crease (1/7), and hypertrichosis (1/7).
Sources: Literature
Mendeliome v0.5990 TACSTD2 Zornitza Stark Phenotypes for gene: TACSTD2 were changed from to Corneal dystrophy, gelatinous drop-like, MIM# 204870
Mendeliome v0.5987 TACSTD2 Zornitza Stark reviewed gene: TACSTD2: Rating: GREEN; Mode of pathogenicity: None; Publications: 10192395, 12107443, 12614764, 31666974, 31534795; Phenotypes: Corneal dystrophy, gelatinous drop-like, MIM# 204870; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5914 RPL3L Elena Savva gene: RPL3L was added
gene: RPL3L was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RPL3L was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RPL3L were set to PMID: 32514796; 32870709
Phenotypes for gene: RPL3L were set to Neonatal dilated cardiomyopathy
Review for gene: RPL3L was set to GREEN
Added comment: PMID: 32514796 - 5 hom/chet individuals from three independent families who presented with severe neonatal dilated cardiomyopathy. Unaffected sibs were either carriers of a single variant or homozygous wildtype.

PMID: 32870709 - 1 hom patient w/ neonatal DCM
Sources: Literature
Mendeliome v0.5914 FBRSL1 Elena Savva gene: FBRSL1 was added
gene: FBRSL1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FBRSL1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: FBRSL1 were set to PMID: 32424618
Phenotypes for gene: FBRSL1 were set to Malformation and intellectual disability syndrome
Review for gene: FBRSL1 was set to GREEN
Added comment: Three children with de novo PTCs that escape NMD, and an overlapping syndromic phenotype with respiratory insufficiency, postnatal growth restriction, microcephaly, global developmental delay and other malformations. 2/3 had heart defects, cleft palate and hearing impairement.
Supported by Xenopus oocyte functional studies
Sources: Literature
Mendeliome v0.5903 HSD17B10 Zornitza Stark Mode of inheritance for gene: HSD17B10 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5902 HSD17B10 Zornitza Stark reviewed gene: HSD17B10: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: HSD10 mitochondrial disease, MIM# 300438; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5854 PRSS56 Zornitza Stark Phenotypes for gene: PRSS56 were changed from to Microphthalmia, isolated 6, MIM# 613517
Mendeliome v0.5851 PRSS56 Zornitza Stark reviewed gene: PRSS56: Rating: GREEN; Mode of pathogenicity: None; Publications: 21532570, 23127749, 31992737; Phenotypes: Microphthalmia, isolated 6, MIM# 613517; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5844 FZD5 Zornitza Stark gene: FZD5 was added
gene: FZD5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FZD5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: FZD5 were set to 32737437; 26908622
Phenotypes for gene: FZD5 were set to Coloboma
Review for gene: FZD5 was set to GREEN
Added comment: Four unrelated families reported.
Sources: Literature
Mendeliome v0.5843 STRA6 Zornitza Stark Phenotypes for gene: STRA6 were changed from to Microphthalmia, isolated, with coloboma 8, MIM# 601186; Microphthalmia, syndromic 9, MIM# 601186
Mendeliome v0.5840 STRA6 Zornitza Stark reviewed gene: STRA6: Rating: GREEN; Mode of pathogenicity: None; Publications: 17273977, 17503335, 19213032, 26373900, 30880327, 26373900, 25457163; Phenotypes: Microphthalmia, isolated, with coloboma 8, MIM# 601186, Microphthalmia, syndromic 9, MIM# 601186; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5830 RAX Zornitza Stark Phenotypes for gene: RAX were changed from Microphthalmia, isolated 3, MIM# 611038 to Microphthalmia, isolated 3, MIM# 611038
Mendeliome v0.5829 RAX Zornitza Stark Phenotypes for gene: RAX were changed from to Microphthalmia, isolated 3, MIM# 611038
Mendeliome v0.5826 RAX Zornitza Stark reviewed gene: RAX: Rating: GREEN; Mode of pathogenicity: None; Publications: 14662654, 18783408, 30811539, 24033328, 22524605; Phenotypes: Microphthalmia, isolated 3, MIM# 611038; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5813 MFRP Zornitza Stark Phenotypes for gene: MFRP were changed from to Microphthalmia, isolated 5, MIM# 611040
Mendeliome v0.5810 MFRP Zornitza Stark reviewed gene: MFRP: Rating: GREEN; Mode of pathogenicity: None; Publications: 17167404, 18554571, 20361016; Phenotypes: Microphthalmia, isolated 5, MIM# 611040; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5807 MAB21L2 Zornitza Stark changed review comment from: More than 7 unrelated families reported with microphthalmia/anophthalmia/coloboma and rhizomelia. Two individuals with the c.151C > T (p.Arg51Cys) variant also had ID. One family reported with eye phenotype and bi-allelic missense variants, LIMITED evidence for bi-allelic disease. Three different animal models support gene-disease association.; to: More than 7 unrelated families reported with microphthalmia/anophthalmia/coloboma and rhizomelia. Several individuals with the c.151C > T (p.Arg51Cys) variant also had ID. One family reported with eye phenotype and bi-allelic missense variants, LIMITED evidence for bi-allelic disease. Three different animal models support gene-disease association.
Mendeliome v0.5799 LOXL3 Zornitza Stark gene: LOXL3 was added
gene: LOXL3 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: LOXL3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LOXL3 were set to 30362103; 25663169
Phenotypes for gene: LOXL3 were set to Stickler syndrome
Review for gene: LOXL3 was set to AMBER
Added comment: Two unrelated families reported with homozygous missense variants, mouse model supports gene-disease association.
Sources: Expert Review
Mendeliome v0.5798 RBP4 Zornitza Stark Phenotypes for gene: RBP4 were changed from to Microphthalmia, isolated, with coloboma 10 MIM#616428; Retinal dystrophy, iris coloboma, and comedogenic acne syndrome MIM#615147
Mendeliome v0.5795 RBP4 Zornitza Stark reviewed gene: RBP4: Rating: GREEN; Mode of pathogenicity: None; Publications: 25910211, 29178648, 23189188, 9888420, 32323592; Phenotypes: Microphthalmia, isolated, with coloboma 10 MIM#616428, Retinal dystrophy, iris coloboma, and comedogenic acne syndrome MIM#615147; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.5791 VSX2 Zornitza Stark Phenotypes for gene: VSX2 were changed from to Microphthalmia with coloboma 3, MIM# 610092; Microphthalmia, isolated 2, MIM# 610093
Mendeliome v0.5788 VSX2 Zornitza Stark reviewed gene: VSX2: Rating: GREEN; Mode of pathogenicity: None; Publications: 15257456, 17661825, 31884615, 28121235, 27301076, 24033328; Phenotypes: Microphthalmia with coloboma 3, MIM# 610092, Microphthalmia, isolated 2, MIM# 610093; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5785 ALDH1A3 Zornitza Stark Phenotypes for gene: ALDH1A3 were changed from to Microphthalmia, isolated 8, MIM# 615113
Mendeliome v0.5782 ALDH1A3 Zornitza Stark reviewed gene: ALDH1A3: Rating: GREEN; Mode of pathogenicity: None; Publications: 23312594, 23591992, 30200890, 28890889, 26873617, 24777706; Phenotypes: Microphthalmia, isolated 8, MIM# 615113; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5769 TUSC3 Zornitza Stark Phenotypes for gene: TUSC3 were changed from to Mental retardation, autosomal recessive 7, MIM# 611093, MONDO:0012615; TUSC3-CDG (Disorders of protein N-glycosylation)
Mendeliome v0.5766 TUSC3 Zornitza Stark reviewed gene: TUSC3: Rating: GREEN; Mode of pathogenicity: None; Publications: 18452889, 18455129, 21739581, 27148795, 31606977; Phenotypes: Mental retardation, autosomal recessive 7, MIM# 611093, MONDO:0012615, TUSC3-CDG (Disorders of protein N-glycosylation); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5766 TMEM165 Zornitza Stark Phenotypes for gene: TMEM165 were changed from to Congenital disorder of glycosylation, type IIk, MIM# 614727; TMEM165-CDG, MONDO:0013870
Mendeliome v0.5763 TMEM165 Zornitza Stark reviewed gene: TMEM165: Rating: GREEN; Mode of pathogenicity: None; Publications: 22683087, 28323990, 27401145, 27008884, 26238249, 25609749; Phenotypes: Congenital disorder of glycosylation, type IIk, MIM# 614727, TMEM165-CDG, MONDO:0013870; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5763 SLC35D1 Zornitza Stark Phenotypes for gene: SLC35D1 were changed from Schneckenbecken dysplasia, MIM 269250 to Schneckenbecken dysplasia, MIM 269250, MONDO:0010013; O-xylosyl/N-acetylgalactosaminylglycan synthesis deficiencies (Disorders of protein O-glycosylation)
Mendeliome v0.5761 SLC35D1 Zornitza Stark reviewed gene: SLC35D1: Rating: GREEN; Mode of pathogenicity: None; Publications: 17952091, 19508970, 31423530; Phenotypes: Schneckenbecken dysplasia 269250, O-xylosyl/N-acetylgalactosaminylglycan synthesis deficiencies (Disorders of protein O-glycosylation); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5761 SLC35C1 Zornitza Stark Phenotypes for gene: SLC35C1 were changed from to Congenital disorder of glycosylation, type IIc, MIM# 266265, MONDO:0009953
Mendeliome v0.5758 SLC35C1 Zornitza Stark reviewed gene: SLC35C1: Rating: GREEN; Mode of pathogenicity: None; Publications: 11326279, 12116250, 33098347, 32313197, 24403049; Phenotypes: Congenital disorder of glycosylation, type IIc, MIM# 266265, MONDO:0009953; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5756 GNE Zornitza Stark Phenotypes for gene: GNE were changed from to Nonaka myopathy 605820; Sialuria MIM#269921; ADUDP-GlcNAc epimerase/kinase deficiency (Disorders of multiple glycosylation and other glycosylation pathways)
Mendeliome v0.5753 GNE Zornitza Stark reviewed gene: GNE: Rating: GREEN; Mode of pathogenicity: None; Publications: 12177386, 12473753, 32053088, 29923088, 10356312, 11326336, 11486897, 27142465; Phenotypes: Nonaka myopathy 605820, Sialuria MIM#269921, ADUDP-GlcNAc epimerase/kinase deficiency (Disorders of multiple glycosylation and other glycosylation pathways); Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.5751 CHSY1 Zornitza Stark edited their review of gene: CHSY1: Changed phenotypes: Temtamy preaxial brachydactyly syndrome, MIM# 605282, MONDO:0011533, CHSY1-CDG (Disorders of protein O-glycosylation, O-mannosylglycan synthesis deficiencies)
Mendeliome v0.5751 CHSY1 Zornitza Stark Phenotypes for gene: CHSY1 were changed from to Temtamy preaxial brachydactyly syndrome, MIM# 605282, MONDO:0011533; CHSY1-CDG (Disorders of protein O-glycosylation, O-mannosylglycan synthesis deficiencies)
Mendeliome v0.5748 CHSY1 Zornitza Stark reviewed gene: CHSY1: Rating: GREEN; Mode of pathogenicity: None; Publications: 21129728, 21129727, 24269551; Phenotypes: VTemtamy preaxial brachydactyly syndrome, MIM# 605282, MONDO:0011533, CHSY1-CDG (Disorders of protein O-glycosylation, O-mannosylglycan synthesis deficiencies); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5748 DHDDS Zornitza Stark Phenotypes for gene: DHDDS were changed from to Developmental delay and seizures with or without movement abnormalities, MIM#617836; Congenital disorder of glycosylation, type 1bb, MIM# 613861
Mendeliome v0.5745 DHDDS Zornitza Stark reviewed gene: DHDDS: Rating: GREEN; Mode of pathogenicity: None; Publications: 27343064, 29100083, 21295283; Phenotypes: Developmental delay and seizures with or without movement abnormalities, MIM#617836, Congenital disorder of glycosylation, type 1bb, MIM# 613861; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5739 TBL1X Elena Savva gene: TBL1X was added
gene: TBL1X was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TBL1X was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Publications for gene: TBL1X were set to PMID: 27603907
Phenotypes for gene: TBL1X were set to Hypothyroidism, congenital, nongoitrous, 8 MIM#301033
Review for gene: TBL1X was set to GREEN
Added comment: PMID: 27603907 - mostly males but also a female diagnosed with central hypothyroidism. 6 families reported (5/6 missense, 1/6 splice). Supported by functional studies ->LOF

All mutations were located in the highly conserved WD40-repeat domains.
Sources: Literature
Mendeliome v0.5739 ST3GAL5 Zornitza Stark Phenotypes for gene: ST3GAL5 were changed from to Salt and pepper developmental regression syndrome 609056; GM3 synthase deficiency, MONDO:0018274; Lactosylceramide alpha-2,3-sialyltransferase deficiency (Disorders of glycosphingolipid and glycosylphosphatidylinositol anchor glycosylation)
Mendeliome v0.5736 ST3GAL5 Zornitza Stark reviewed gene: ST3GAL5: Rating: GREEN; Mode of pathogenicity: None; Publications: 23436467, 22990144, 15502825, 27232954, 30691927, 30688114, 30576498; Phenotypes: Salt and pepper developmental regression syndrome 609056, GM3 synthase deficiency, MONDO:0018274, Lactosylceramide alpha-2,3-sialyltransferase deficiency (Disorders of glycosphingolipid and glycosylphosphatidylinositol anchor glycosylation); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5733 RFT1 Zornitza Stark Phenotypes for gene: RFT1 were changed from to Congenital disorder of glycosylation, type In, MIM# 612015; RFT1-CDG, MONDO:0012783
Mendeliome v0.5730 RFT1 Zornitza Stark reviewed gene: RFT1: Rating: GREEN; Mode of pathogenicity: None; Publications: 18313027, 19701946, 19856127, 23111317, 30071302, 29923091, 27927990, 26892341; Phenotypes: Congenital disorder of glycosylation, type In, MIM# 612015, RFT1-CDG, MONDO:0012783; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5727 MGAT2 Zornitza Stark Phenotypes for gene: MGAT2 were changed from to Congenital disorder of glycosylation, type IIa, MIM# 212066; MGAT2-CDG, MONDO:0008908
Mendeliome v0.5724 MGAT2 Zornitza Stark reviewed gene: MGAT2: Rating: GREEN; Mode of pathogenicity: None; Publications: 8808595, 11228641, 22105986, 33044030, 31420886; Phenotypes: Congenital disorder of glycosylation, type IIa, MIM# 212066, MGAT2-CDG, MONDO:0008908; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5724 MPI Zornitza Stark Phenotypes for gene: MPI were changed from to Congenital disorder of glycosylation, type Ib, MIM# 602579; MPI-CDG MONDO:0011257
Mendeliome v0.5721 MPI Zornitza Stark reviewed gene: MPI: Rating: GREEN; Mode of pathogenicity: None; Publications: 12414827, 9585601, 10980531, 33098580, 33204592, 32905087, 32266963, 30242110; Phenotypes: Congenital disorder of glycosylation, type Ib, MIM# 602579, MPI-CDG MONDO:0011257; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5718 PGM3 Zornitza Stark changed review comment from: Phosphoglucomutase 3 (PGM3) protein catalyzes the conversion of N-acetyl-d-glucosamine-6-phosphate (GlcNAc-6-P) to N-acetyl-d-glucosamine-1-phosphate (GlcNAc-1-P), which is required for the synthesis of uridine diphosphate N-acetylglucosamine (UDP-GlcNAc) an important precursor for protein glycosylation. Bi-allelic variants in this gene are associated with a primary immunodeficiency syndrome characterised by onset of recurrent infections, usually respiratory or cutaneous, in early childhood. Immune workup usually shows neutropenia, lymphopenia, eosinophilia, and increased serum IgE or IgA. Neutrophil chemotactic defects have also been reported. Infectious agents include bacteria, viruses, and fungi. Many patients develop atopic dermatitis, eczema, and other signs of autoinflammation. Affected individuals may also show developmental delay or cognitive impairment of varying severity. More than 10 unrelated families reported.; to: Phosphoglucomutase 3 (PGM3) protein catalyzes the conversion of N-acetyl-d-glucosamine-6-phosphate (GlcNAc-6-P) to N-acetyl-d-glucosamine-1-phosphate (GlcNAc-1-P), which is required for the synthesis of uridine diphosphate N-acetylglucosamine (UDP-GlcNAc) an important precursor for protein glycosylation.

Bi-allelic variants in this gene are associated with a primary immunodeficiency syndrome characterised by onset of recurrent infections, usually respiratory or cutaneous, in early childhood. Immune workup usually shows neutropenia, lymphopenia, eosinophilia, and increased serum IgE or IgA. Neutrophil chemotactic defects have also been reported. Infectious agents include bacteria, viruses, and fungi. Many patients develop atopic dermatitis, eczema, and other signs of autoinflammation. Affected individuals may also show developmental delay or cognitive impairment of varying severity.

More than 10 unrelated families reported.
Mendeliome v0.5690 MPDU1 Zornitza Stark Phenotypes for gene: MPDU1 were changed from to Congenital disorder of glycosylation, type If, MIM# 609180; MPDU1-CDG, MONDO:0012211
Mendeliome v0.5687 MPDU1 Zornitza Stark reviewed gene: MPDU1: Rating: GREEN; Mode of pathogenicity: None; Publications: 11733564, 11733556, 31741824, 29721919; Phenotypes: Congenital disorder of glycosylation, type If, MIM# 609180, MPDU1-CDG, MONDO:0012211; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5687 DPAGT1 Zornitza Stark Phenotypes for gene: DPAGT1 were changed from to Congenital disorder of glycosylation, type Ij, MIM# 608093; DPAGT1-CDG MONDO:0011964; Myasthenic syndrome, congenital, 13, with tubular aggregates, MIM# 614750
Mendeliome v0.5684 DPAGT1 Zornitza Stark changed review comment from: Type I CDG. More than 20 unrelated families reported. Most affected individuals have a very severe disease course, where common findings are pronounced muscular hypotonia, intractable epilepsy, global developmental delay/intellectual disability, and early death. Additional features that may be observed include apnoea and respiratory deficiency, cataracts, joint contractures, vermian hypoplasia, dysmorphic features (esotropia, arched palate, micrognathia, finger clinodactyly, single flexion creases) and feeding difficulties.

Myasthenic syndrome, congenital, 13, with tubular aggregates, MIM 614750 is a milder allelic disorder.; to: Type I CDG. More than 20 unrelated families reported. Most affected individuals have a very severe disease course, where common findings are pronounced muscular hypotonia, intractable epilepsy, global developmental delay/intellectual disability, and early death. Additional features that may be observed include apnoea and respiratory deficiency, cataracts, joint contractures, vermian hypoplasia, dysmorphic features (esotropia, arched palate, micrognathia, finger clinodactyly, single flexion creases) and feeding difficulties.

Myasthenic syndrome, congenital, 13, with tubular aggregates, MIM 614750 is a milder allelic disorder. More than 5 unrelated families reported with this presentation.
Mendeliome v0.5684 DPAGT1 Zornitza Stark reviewed gene: DPAGT1: Rating: GREEN; Mode of pathogenicity: None; Publications: 12872255, 22492991, 22304930, 31153949, 30653653, 30117111; Phenotypes: Congenital disorder of glycosylation, type Ij, MIM# 608093, DPAGT1-CDG MONDO:0011964, Myasthenic syndrome, congenital, 13, with tubular aggregates, MIM# 614750; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5684 DOLK Zornitza Stark Phenotypes for gene: DOLK were changed from to DK1-CDG, MONDO:0012556; Congenital disorder of glycosylation, type Im, MIM# 610768
Mendeliome v0.5681 DOLK Zornitza Stark reviewed gene: DOLK: Rating: GREEN; Mode of pathogenicity: None; Publications: 17273964, 22242004, 23890587, 30653653, 28816422, 24144945; Phenotypes: DK1-CDG, MONDO:0012556, Congenital disorder of glycosylation, type Im, MIM# 610768; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5671 MYH6 Zornitza Stark Phenotypes for gene: MYH6 were changed from to Atrial septal defect 3 MIM#614089; Congenital heart disease; Cardiomyopathy, dilated, 1EE MIM#613252; Cardiomyopathy, hypertrophic, 14 MIM#613251; {Sick sinus syndrome 3} MIM#614090
Mendeliome v0.5668 MYH6 Zornitza Stark reviewed gene: MYH6: Rating: GREEN; Mode of pathogenicity: None; Publications: 32656206, 31638415, 29969989, 29536580, 29332214, 30681346; Phenotypes: Atrial septal defect 3 MIM#614089, Congenital heart disease, Cardiomyopathy, dilated, 1EE MIM#613252, Cardiomyopathy, hypertrophic, 14 MIM#613251, {Sick sinus syndrome 3} MIM#614090; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.5665 MYH6 Elena Savva reviewed gene: MYH6: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Atrial septal defect 3 MIM#614089, Cardiomyopathy, dilated, 1EE MIM#613252, Cardiomyopathy, hypertrophic, 14 MIM#613251, {Sick sinus syndrome 3} MIM#614090; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.5665 COG6 Zornitza Stark Phenotypes for gene: COG6 were changed from to Congenital disorder of glycosylation, type IIl, MIM# 614576
Mendeliome v0.5662 COG6 Zornitza Stark reviewed gene: COG6: Rating: GREEN; Mode of pathogenicity: None; Publications: 20605848, 23430903, 26260076, 32905044, 32683677, 31420886; Phenotypes: Congenital disorder of glycosylation, type IIl, MIM# 614576; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5662 COG5 Zornitza Stark Phenotypes for gene: COG5 were changed from to Congenital disorder of glycosylation, type IIi, MIM# 613612
Mendeliome v0.5659 COG5 Zornitza Stark reviewed gene: COG5: Rating: GREEN; Mode of pathogenicity: None; Publications: 23228021, 31572517, 32174980; Phenotypes: Congenital disorder of glycosylation, type IIi, MIM# 613612; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5648 PANX1 Zornitza Stark gene: PANX1 was added
gene: PANX1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PANX1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PANX1 were set to 30918116; 32838805
Phenotypes for gene: PANX1 were set to Oocyte maturation defect 7, MIM# 618550
Review for gene: PANX1 was set to AMBER
Added comment: Two unrelated families, some functional data. Clinical presentation is with infertility.
Sources: Expert list
Mendeliome v0.5642 PATL2 Zornitza Stark gene: PATL2 was added
gene: PATL2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PATL2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PATL2 were set to 28965844; 28965849; 32048119; 30765866
Phenotypes for gene: PATL2 were set to Oocyte maturation defect 4, MIM# 617743
Review for gene: PATL2 was set to GREEN
Added comment: More than 5 unrelated families reported, presentation is with infertility.
Sources: Expert list
Mendeliome v0.5630 DIAPH2 Bryony Thompson reviewed gene: DIAPH2: Rating: RED; Mode of pathogenicity: None; Publications: 9497258, 30689869, 26175800, 11129329; Phenotypes: ?Premature ovarian failure 2A MIM#300511; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5615 ZP1 Zornitza Stark gene: ZP1 was added
gene: ZP1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ZP1 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: ZP1 were set to 24670168; 30810869; 32573113; 33272616
Phenotypes for gene: ZP1 were set to Oocyte maturation defect 1, MIM# 615774
Review for gene: ZP1 was set to GREEN
Added comment: Multiple unrelated individuals reported, presents as primary infertility.
Sources: Expert list
Mendeliome v0.5610 CCDC32 Zornitza Stark Phenotypes for gene: CCDC32 were changed from craniofacial, cardiac and neurodevelopmental anomalies to Cardiofacioneurodevelopmental syndrome (CFNDS), MIM#619123; Craniofacial, cardiac, laterality and neurodevelopmental anomalies
Mendeliome v0.5609 CCDC32 Zornitza Stark edited their review of gene: CCDC32: Changed rating: GREEN; Changed phenotypes: Cardiofacioneurodevelopmental syndrome (CFNDS), MIM#619123, Craniofacial, cardiac, laterality and neurodevelopmental anomalies; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5607 PPIL1 Zornitza Stark gene: PPIL1 was added
gene: PPIL1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PPIL1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PPIL1 were set to 33220177
Phenotypes for gene: PPIL1 were set to Pontocerebellar hypoplasia; microcephaly; seizures
Review for gene: PPIL1 was set to GREEN
Added comment: 17 individuals from 9 unrelated families reported with bi-allelic variants in the gene and PCH, microcephaly, hypotonia, seizures, severe DD/ID. Mouse models support gene-disease association.
Sources: Literature
Mendeliome v0.5600 CANVAS_ACAGG Bryony Thompson STR: CANVAS_ACAGG was added
STR: CANVAS_ACAGG was added to Mendeliome. Sources: Literature
Mode of inheritance for STR: CANVAS_ACAGG was set to BIALLELIC, autosomal or pseudoautosomal
Publications for STR: CANVAS_ACAGG were set to 33103729
Phenotypes for STR: CANVAS_ACAGG were set to Cerebellar ataxia, neuropathy, and vestibular areflexia syndrome; fasciculations; elevated serum creatine kinase levels; denervation
Review for STR: CANVAS_ACAGG was set to AMBER
Added comment: A novel RFC1 repeat expansion motif, (ACAGG)exp, identified in three affected individuals from 2 families in an Asian-Pacific cohort for CANVAS. Southern blot was used to identify the repeat was ~1000kb in one of the cases, equivalent to ~1000 repeats.
Sources: Literature
Mendeliome v0.5598 CANVAS Bryony Thompson STR: CANVAS was added
STR: CANVAS was added to Mendeliome. Sources: Expert list
Mode of inheritance for STR: CANVAS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for STR: CANVAS were set to 30926972; 32851396
Phenotypes for STR: CANVAS were set to Cerebellar ataxia, neuropathy, and vestibular areflexia syndrome MIM#614575
Review for STR: CANVAS was set to GREEN
STR: CANVAS was marked as clinically relevant
Added comment: Simple tandem repeat (AAAAG)11 replaced with (AAGGG)n in intron 2 of RFC1. Loss of function is not the mechanism of disease. Maori population-specific CANVAS configuration (AAAGG)10-25(AAGGG)exp. (AAAGG)n repeat alone is not pathogenic.
Sources: Expert list
Mendeliome v0.5596 GDF11 Zornitza Stark Phenotypes for gene: GDF11 were changed from Cleft lip and palate to Vertebral hypersegmentation and orofacial anomalies (VHO), MIM#619122
Mendeliome v0.5590 LMX1B Zornitza Stark Phenotypes for gene: LMX1B were changed from Nail-patella syndrome (MIM#161200), MONDO:0008061; LMX1B-related nephropathy to Nail-patella syndrome (MIM#161200), MONDO:0008061; LMX1B-related nephropathy; Focal segmental glomerulosclerosis-10 (FSGS10), MIM#256020
Mendeliome v0.5589 LMX1B Zornitza Stark edited their review of gene: LMX1B: Changed phenotypes: Nail-patella syndrome (MIM#161200), MONDO:0008061, LMX1B-related nephropathy, Focal segmental glomerulosclerosis-10 (FSGS10), MIM#256020
Mendeliome v0.5579 EMC10 Zornitza Stark gene: EMC10 was added
gene: EMC10 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EMC10 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EMC10 were set to 32869858
Phenotypes for gene: EMC10 were set to Intellectual disability
Review for gene: EMC10 was set to RED
Added comment: Homozygous variants of EMC1 are associated with GDD, scoliosis, and cerebellar atrophy, indicating the relevance of this pathway for neurogenetic disorders.

One Saudi family with 2 affected individuals with mild ID, speech delay, and GDD.
WES and Sanger sequencing revealed a homozygous splice acceptor site variant (c.679‐1G>A) in EMC10 . Variant segregated within the family. RT‐qPCR showed a substantial decrease in the relative EMC10 gene expression in the patients.
Sources: Literature
Mendeliome v0.5576 CFAP52 Zornitza Stark gene: CFAP52 was added
gene: CFAP52 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CFAP52 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CFAP52 were set to 25469542; 33139725
Phenotypes for gene: CFAP52 were set to Heterotaxy
Review for gene: CFAP52 was set to GREEN
Added comment: Five unrelated families and functional data.
Sources: Literature
Mendeliome v0.5575 CFAP45 Zornitza Stark gene: CFAP45 was added
gene: CFAP45 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CFAP45 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CFAP45 were set to 33139725
Phenotypes for gene: CFAP45 were set to Situs inversus; asthenospermia
Review for gene: CFAP45 was set to GREEN
Added comment: Three unrelated individuals reported with bi-alleic LOF variants, mouse model recapitulated phenotype.
Sources: Literature
Mendeliome v0.5572 CLCN6 Zornitza Stark edited their review of gene: CLCN6: Added comment: Three unrelated families reported with recurrent GOF de novo c.1658A>G (p.Tyr553Cys) and severe developmental delay with pronounced generalized hypotonia, respiratory insufficiency, and variable neurodegeneration and diffusion restriction in cerebral peduncles, midbrain, and/or brainstem in MRI scans.; Changed rating: GREEN; Changed publications: 25794116, 21107136, 33217309; Changed phenotypes: Neurodegeneration, Benign partial epilepsy, febrile seizures, NCL; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.5572 GDF6 Zornitza Stark Phenotypes for gene: GDF6 were changed from Klippel-Feil syndrome 1, autosomal dominant 118100; Leber congenital amaurosis 17 615360; Microphthalmia with coloboma 6, digenic 613703; Microphthalmia, isolated 4 613094; Multiple synostoses syndrome 4 617898 to Klippel-Feil syndrome 1, autosomal dominant 118100; Leber congenital amaurosis 17 615360; Microphthalmia with coloboma 6, digenic 613703; Microphthalmia, isolated 4 613094; Multiple synostoses syndrome 4 617898; CAKUT
Mendeliome v0.5571 GDF6 Zornitza Stark Phenotypes for gene: GDF6 were changed from to Klippel-Feil syndrome 1, autosomal dominant 118100; Leber congenital amaurosis 17 615360; Microphthalmia with coloboma 6, digenic 613703; Microphthalmia, isolated 4 613094; Multiple synostoses syndrome 4 617898
Mendeliome v0.5567 GDF6 Belinda Chong reviewed gene: GDF6: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 32737436; Phenotypes: Klippel-Feil syndrome 1, autosomal dominant 118100, Leber congenital amaurosis 17 615360, Microphthalmia with coloboma 6, digenic 613703, Microphthalmia, isolated 4 613094, Multiple synostoses syndrome 4 617898; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.5567 VPS4A Kristin Rigbye changed review comment from: PMID: 33186543 - 2x de novo hetorozygous missense variants in the AAA (large ATPase) domain.
1x homozygous missense in the MIT domain (milder phenotype and unaffected parents).
Demonstrated defective CD71 trafficking in all 3 patients.

PMID: 33186545 - 6x probands with de novo missense variants in the AAA domain. 5 of the variants were at amino acid position 284 (changes to Trp and Gly).
Demonstrated that the variants had a dominant-negative effect on VPS4A function.
"The six probands with de novo substitutions affecting Glu206 or Arg284 had a consistent phenotype characterized by severe DD, profound ID, and dystonia. Children were very delayed in establishing head control and none achieved independent walking. Other common findings were cerebellar hypoplasia (five individuals out of six, the other showing uncharacterized severe cerebral atrophy) with a variable degree of corpus callosum hypoplasia. One individual also had bilateral polymicrogyria. Epilepsy was present in three and dystonia in five subjects. Eye involvement was also a common finding, including congenital cataract, retinal dystrophy, and in one case congenital Leber amaurosis. Four individuals were diagnosed with hepatosplenomegaly and/or steatosis. Three subjects had anemia, which was characterized as dyserythropoietic in two. Severe feeding difficulties were present in four individuals, requiring assisted feeding in three. Two had sensorineural deafness. Severe growth retardation, generally for all parameters, was present in most cases. Notably, severe microcephaly (typically with Z scores < −5) was universal. Overall, the disorder seems to have a poor prognosis as two affected individuals died in childhood or early adult life."
Sources: Literature; to: PMID: 33186543 - 2x de novo hetorozygous missense variants in the AAA (large ATPase) domain.
1x homozygous missense in the MIT domain (milder phenotype and unaffected parents - possibly just a simple LoF mechanism for AR inheritance).
Demonstrated defective CD71 trafficking in all 3 patients.

PMID: 33186545 - 6x probands with de novo missense variants in the AAA domain. 5 of the variants were at amino acid position 284 (changes to Trp and Gly).
Demonstrated that the variants had a dominant-negative effect on VPS4A function.

"The six probands with de novo substitutions affecting Glu206 or Arg284 had a consistent phenotype characterized by severe DD, profound ID, and dystonia. Children were very delayed in establishing head control and none achieved independent walking. Other common findings were cerebellar hypoplasia (five individuals out of six, the other showing uncharacterized severe cerebral atrophy) with a variable degree of corpus callosum hypoplasia. One individual also had bilateral polymicrogyria. Epilepsy was present in three and dystonia in five subjects. Eye involvement was also a common finding, including congenital cataract, retinal dystrophy, and in one case congenital Leber amaurosis. Four individuals were diagnosed with hepatosplenomegaly and/or steatosis. Three subjects had anemia, which was characterized as dyserythropoietic in two. Severe feeding difficulties were present in four individuals, requiring assisted feeding in three. Two had sensorineural deafness. Severe growth retardation, generally for all parameters, was present in most cases. Notably, severe microcephaly (typically with Z scores < −5) was universal. Overall, the disorder seems to have a poor prognosis as two affected individuals died in childhood or early adult life."
Mendeliome v0.5567 VPS4A Elena Savva changed review comment from: Comment when marking as ready: PMID: 33186543 - 2x de novo hetorozygous missense variants in the AAA (large ATPase) domain. 1x homozygous missense in the MIT domain (milder phenotype and unaffected parents). Demonstrated defective CD71 trafficking in all 3 patients. PMID: 33186545 - 6x probands with de novo missense variants in the AAA domain. 5 of the variants were at amino acid position 284 (changes to Trp and Gly). Demonstrated that the variants had a dominant-negative effect on VPS4A function. "The six probands with de novo substitutions affecting Glu206 or Arg284 had a consistent phenotype characterized by severe DD, profound ID, and dystonia. Children were very delayed in establishing head control and none achieved independent walking. Other common findings were cerebellar hypoplasia (five individuals out of six, the other showing uncharacterized severe cerebral atrophy) with a variable degree of corpus callosum hypoplasia. One individual also had bilateral polymicrogyria. Epilepsy was present in three and dystonia in five subjects. Eye involvement was also a common finding, including congenital cataract, retinal dystrophy, and in one case congenital Leber amaurosis. Four individuals were diagnosed with hepatosplenomegaly and/or steatosis. Three subjects had anemia, which was characterized as dyserythropoietic in two. Severe feeding difficulties were present in four individuals, requiring assisted feeding in three. Two had sensorineural deafness. Severe growth retardation, generally for all parameters, was present in most cases. Notably, severe microcephaly (typically with Z scores < −5) was universal. Overall, the disorder seems to have a poor prognosis as two affected individuals died in childhood or early adult life."; to: PMID: 33186543 - 2x de novo hetorozygous missense variants in the AAA (large ATPase) domain.
1x homozygous missense in the MIT domain (milder phenotype and unaffected parents).
Demonstrated defective CD71 trafficking in all 3 patients.

Comment when marking as ready: PMID: 33186543 - 2x de novo hetorozygous missense variants in the AAA (large ATPase) domain. 1x homozygous missense in the MIT domain (milder phenotype and unaffected parents). Demonstrated defective CD71 trafficking in all 3 patients. PMID: 33186545 - 6x probands with de novo missense variants in the AAA domain. 5 of the variants were at amino acid position 284 (changes to Trp and Gly). Demonstrated that the variants had a dominant-negative effect on VPS4A function. "The six probands with de novo substitutions affecting Glu206 or Arg284 had a consistent phenotype characterized by severe DD, profound ID, and dystonia. Children were very delayed in establishing head control and none achieved independent walking. Other common findings were cerebellar hypoplasia (five individuals out of six, the other showing uncharacterized severe cerebral atrophy) with a variable degree of corpus callosum hypoplasia. One individual also had bilateral polymicrogyria. Epilepsy was present in three and dystonia in five subjects. Eye involvement was also a common finding, including congenital cataract, retinal dystrophy, and in one case congenital Leber amaurosis. Four individuals were diagnosed with hepatosplenomegaly and/or steatosis. Three subjects had anemia, which was characterized as dyserythropoietic in two. Severe feeding difficulties were present in four individuals, requiring assisted feeding in three. Two had sensorineural deafness. Severe growth retardation, generally for all parameters, was present in most cases. Notably, severe microcephaly (typically with Z scores < −5) was universal. Overall, the disorder seems to have a poor prognosis as two affected individuals died in childhood or early adult life."
Mendeliome v0.5567 VPS4A Elena Savva Added comment: Comment when marking as ready: PMID: 33186543 - 2x de novo hetorozygous missense variants in the AAA (large ATPase) domain. 1x homozygous missense in the MIT domain (milder phenotype and unaffected parents). Demonstrated defective CD71 trafficking in all 3 patients. PMID: 33186545 - 6x probands with de novo missense variants in the AAA domain. 5 of the variants were at amino acid position 284 (changes to Trp and Gly). Demonstrated that the variants had a dominant-negative effect on VPS4A function. "The six probands with de novo substitutions affecting Glu206 or Arg284 had a consistent phenotype characterized by severe DD, profound ID, and dystonia. Children were very delayed in establishing head control and none achieved independent walking. Other common findings were cerebellar hypoplasia (five individuals out of six, the other showing uncharacterized severe cerebral atrophy) with a variable degree of corpus callosum hypoplasia. One individual also had bilateral polymicrogyria. Epilepsy was present in three and dystonia in five subjects. Eye involvement was also a common finding, including congenital cataract, retinal dystrophy, and in one case congenital Leber amaurosis. Four individuals were diagnosed with hepatosplenomegaly and/or steatosis. Three subjects had anemia, which was characterized as dyserythropoietic in two. Severe feeding difficulties were present in four individuals, requiring assisted feeding in three. Two had sensorineural deafness. Severe growth retardation, generally for all parameters, was present in most cases. Notably, severe microcephaly (typically with Z scores < −5) was universal. Overall, the disorder seems to have a poor prognosis as two affected individuals died in childhood or early adult life."
Mendeliome v0.5558 VPS4A Kristin Rigbye gene: VPS4A was added
gene: VPS4A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: VPS4A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: VPS4A were set to PMID: 33186543; 33186545
Phenotypes for gene: VPS4A were set to Neurodevelopmental disorder
Review for gene: VPS4A was set to GREEN
Added comment: PMID: 33186543 - 2x de novo hetorozygous missense variants in the AAA (large ATPase) domain.
1x homozygous missense in the MIT domain (milder phenotype and unaffected parents).
Demonstrated defective CD71 trafficking in all 3 patients.

PMID: 33186545 - 6x probands with de novo missense variants in the AAA domain. 5 of the variants were at amino acid position 284 (changes to Trp and Gly).
Demonstrated that the variants had a dominant-negative effect on VPS4A function.
"The six probands with de novo substitutions affecting Glu206 or Arg284 had a consistent phenotype characterized by severe DD, profound ID, and dystonia. Children were very delayed in establishing head control and none achieved independent walking. Other common findings were cerebellar hypoplasia (five individuals out of six, the other showing uncharacterized severe cerebral atrophy) with a variable degree of corpus callosum hypoplasia. One individual also had bilateral polymicrogyria. Epilepsy was present in three and dystonia in five subjects. Eye involvement was also a common finding, including congenital cataract, retinal dystrophy, and in one case congenital Leber amaurosis. Four individuals were diagnosed with hepatosplenomegaly and/or steatosis. Three subjects had anemia, which was characterized as dyserythropoietic in two. Severe feeding difficulties were present in four individuals, requiring assisted feeding in three. Two had sensorineural deafness. Severe growth retardation, generally for all parameters, was present in most cases. Notably, severe microcephaly (typically with Z scores < −5) was universal. Overall, the disorder seems to have a poor prognosis as two affected individuals died in childhood or early adult life."
Sources: Literature
Mendeliome v0.5556 DAAM2 Ain Roesley gene: DAAM2 was added
gene: DAAM2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DAAM2 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: DAAM2 were set to steroid-resistant nephrotic syndrome (SRNS)
Penetrance for gene: DAAM2 were set to unknown
Review for gene: DAAM2 was set to GREEN
Added comment: - steroid-resistant nephrotic syndrome (SRNS) with focal segmental glomerulosclerosis on histologic analysis of kidney biopsies and foot process effacement shown by electron microscopy (authors have suggested the term nephrotic syndrome type 22 (NPHS22))
- 4 unrelated families, 3 of which were consanguineous
- 4 unique missense and 1 stop
- in vitro studies done for the missense variants
Sources: Literature
Mendeliome v0.5554 HS2ST1 Ain Roesley gene: HS2ST1 was added
gene: HS2ST1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: HS2ST1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: HS2ST1 were set to 33159882
Penetrance for gene: HS2ST1 were set to unknown
Review for gene: HS2ST1 was set to GREEN
Added comment: - 4 affected from 3 unrelated families
- 3 unique missense and 2 PTCs
- Developmental Delay, Corpus Callosum Hypoplasia or Aplasia, and Skeletal and Renal Abnormalities
Sources: Literature
Mendeliome v0.5553 MINPP1 Zornitza Stark gene: MINPP1 was added
gene: MINPP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MINPP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MINPP1 were set to 33257696
Phenotypes for gene: MINPP1 were set to Pontocerebellar hypoplasia
Review for gene: MINPP1 was set to GREEN
Added comment: 8 individuals from 6 unrelated families reported with bi-allelic LOF variants. All presented with almost complete absence of motor and cognitive development, progressive or congenital microcephaly, spastic tetraplegia or dystonia, and vision impairments. For most, the first symptoms included neonatal severe axial hypotonia and epilepsy that started during the first months or years of life. Prenatal symptoms of microcephaly associated with increased thalami echogenicity were detected in one, while the seven other individuals presented with progressive microcephaly. Some exhibited rapidly progressive phenotype and the affected children died in their infancy or middle-childhood. Strikingly, all the affected children had a unique brain MRI showing a mild to severe PCH, fluid-filled posterior fossa, with dilated lateral ventricles. In addition, severe atrophy at the level of the basal ganglia or thalami often associated with typical T2 hypersignal were identified in all the patients MRI.

Supportive functional data showing accumulation of highly phosphorylated inositols, mostly inositol hexakisphosphate (IP6), detected in HEK293 cells, fibroblasts, iPSCs and differentiating neurons lacking MINPP1. In mutant cells, higher IP6 level is expected to be associated with an increased chelation of intracellular cations, such as iron or calcium, resulting in decreased levels of available ions.
Sources: Literature
Mendeliome v0.5549 DNAJB11 Zornitza Stark changed review comment from: Seven unrelated. families described with phenotypes overlapping ADTKD and ADPKD, five different variants, one of these, p.Arg206* recurrent in three families.; to: Seven unrelated. families described with phenotypes overlapping ADTKD and ADPKD, five different mono-allelic variants, one of these, p.Arg206* recurrent in three families.
Mendeliome v0.5549 DNAJB11 Zornitza Stark edited their review of gene: DNAJB11: Added comment: Single family reported with bi-allelic variant and severe, fetal onset renal cystic disease, dilation and proliferation of pancreatic duct cells, and liver ductal plate malformation, an association known as Ivemark II syndrome.; Changed publications: 29706351, 29777155, 33129895; Changed phenotypes: Polycystic kidney disease 6 with or without polycystic liver disease, MIM#618061, Ivermark II syndrome.; Changed mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
Mendeliome v0.5547 HHAT Zornitza Stark gene: HHAT was added
gene: HHAT was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: HHAT was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: HHAT were set to 24784881; 30912300
Phenotypes for gene: HHAT were set to Nivelon-Nivelon-Mabille syndrome 600092
Review for gene: HHAT was set to AMBER
Added comment: Two unrelated families reported. Clinical features include progressive microcephaly, cerebellar vermis hypoplasia, and skeletal dysplasia. Variable features include infantile-onset seizures, dwarfism, generalized chondrodysplasia, and micromelia.
Sources: Expert list
Mendeliome v0.5541 H3F3B Zornitza Stark edited their review of gene: H3F3B: Added comment: 13 unrelated individuals reported with missense variants in H3F3B. Phenotype primarily comprised intellectual disability and minor congenital anomalies, regression in significant proportion. Seizures in 50%.; Changed rating: GREEN; Changed publications: 33268356; Changed phenotypes: Intellectual disability, regression, seizures; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.5537 H3F3A Zornitza Stark edited their review of gene: H3F3A: Added comment: 33 unrelated individuals reported with missense variants in H3F3A. Phenotype primarily comprised intellectual disability and minor congenital anomalies, regression in significant proportion. Seizures in 50%.; Changed rating: GREEN; Changed publications: 33268356; Changed phenotypes: Intellectual disability, regression; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.5534 PRPS1 Zornitza Stark Phenotypes for gene: PRPS1 were changed from to Arts syndrome MIM#301835; Charcot-Marie-Tooth disease, X-linked recessive, 5 MIM#311070; Deafness, X-linked 1 MIM#304500; Gout, PRPS-related MIM#300661; Phosphoribosylpyrophosphate synthetase superactivity MIM#300661
Mendeliome v0.5531 PRPS1 Zornitza Stark Mode of inheritance for gene: PRPS1 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5527 PRPS1 Elena Savva reviewed gene: PRPS1: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 32781272, 17701896, 7593598; Phenotypes: Arts syndrome MIM#301835, Charcot-Marie-Tooth disease, X-linked recessive, 5 MIM#311070, Deafness, X-linked 1 MIM#304500, Gout, PRPS-related MIM#300661, Phosphoribosylpyrophosphate synthetase superactivity MIM#300661; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5526 YIPF5 Zornitza Stark gene: YIPF5 was added
gene: YIPF5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: YIPF5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: YIPF5 were set to 33164986
Phenotypes for gene: YIPF5 were set to Neonatal diabetes; microcephaly; seizures
Review for gene: YIPF5 was set to GREEN
Added comment: Six individuals from 5 unrelated consanguineous families reported with bi-allelic variants in this gene and neonatal/early-onset diabetes, severe microcephaly, and epilepsy. Functional data supports gene-disease association.
Sources: Literature
Mendeliome v0.5524 TFE3 Zornitza Stark Mode of inheritance for gene: TFE3 was changed from MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5523 TFE3 Zornitza Stark edited their review of gene: TFE3: Added comment: PMID: 32409512 (2020) - 14 variants reported as de novo events in 17 unrelated cases (including 5 previously published) of severe intellectual disability with pigmentary mosaicism and storage disorder-like features; Changed publications: 30595499, 31833172, 32409512; Changed mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5514 NPPA Zornitza Stark Phenotypes for gene: NPPA were changed from to Atrial fibrillation, familial, 6, (MIM#612201)
Mendeliome v0.5511 NPPA Zornitza Stark reviewed gene: NPPA: Rating: AMBER; Mode of pathogenicity: None; Publications: 18614783, 20064500, 31034774, 31077706; Phenotypes: Atrial fibrillation, familial, 6, (MIM#612201); Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.5502 COX16 Bryony Thompson gene: COX16 was added
gene: COX16 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: COX16 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COX16 were set to 33169484
Phenotypes for gene: COX16 were set to Hypertrophic cardiomyopathy; encephalopathy; severe fatal lactic acidosis
Review for gene: COX16 was set to AMBER
Added comment: 2 unrelated patients with the same homozygous (non-consanguineous) nonsense variant c.244C>T (p.Arg82*), and isolated complex IV deficiency present in both patient fibroblasts/skeletal muscle biopsy. COX16 is involved in the biogenesis of complex IV, the terminal complex of the mitochondrial respiratory chain (RC)
Sources: Literature
Mendeliome v0.5483 GPAA1 Zornitza Stark edited their review of gene: GPAA1: Added comment: At least 5 unrelated families reported with bi-allelic variants in this gene and delayed psychomotor development, variable intellectual disability, hypotonia, early-onset seizures in most, and cerebellar atrophy, resulting in cerebellar signs including gait ataxia and dysarthria. The disorder is caused by a defect in glycosylphosphatidylinositol (GPI) biosynthesis.; Changed publications: 29100095
Mendeliome v0.5474 ATP7A Elena Savva reviewed gene: ATP7A: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 21221114; Phenotypes: Occipital horn syndrome, 304150, X-linked recessive Menkes disease, 309400 Spinal muscular atrophy, distal, X-linked 3, 300489; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5472 AGBL1 Zornitza Stark gene: AGBL1 was added
gene: AGBL1 was added to Mendeliome. Sources: Expert Review
disputed tags were added to gene: AGBL1.
Mode of inheritance for gene: AGBL1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: AGBL1 were set to 24094747; 31555324
Phenotypes for gene: AGBL1 were set to Corneal dystrophy, Fuchs endothelial, 8, MIM# 615523
Review for gene: AGBL1 was set to RED
Added comment: Gene disease association first reported in 2013 in PMID 24094747, in a large multigenerational family. However, note the variant reported, p.Arg1028Ter is present in over 400 hets in gnomad. Another variant reported in same paper, p.Cys990Ser in three unrelated individuals, is present in over 300 hets in gnomad and 1 hom.

Two further variants reported in PMID 31555324, one is missense, p.Arg748His, present in 60 hets, and the other, p.Arg1028Ter, is present is the variant identified in the previous publication, present in over 400 hets.

These variant frequencies are out of keeping for a rare disorder.
Sources: Expert Review
Mendeliome v0.5462 SSR3 Zornitza Stark gene: SSR3 was added
gene: SSR3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SSR3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SSR3 were set to 30945312
Phenotypes for gene: SSR3 were set to Congenital disorder of glycosylation
Review for gene: SSR3 was set to AMBER
Added comment: Single individual reported with an unsolved type I CDG, intellectual disability, homozygous LOF variant in SSR3, supportive functional evidence.
Sources: Literature
Mendeliome v0.5461 LCP2 Zornitza Stark gene: LCP2 was added
gene: LCP2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LCP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LCP2 were set to 33231617
Phenotypes for gene: LCP2 were set to Severe combined immunodeficiency
Review for gene: LCP2 was set to RED
Added comment: Infant with bi-allelic variants in this gene and early-onset life-threatening infections, combined T and B cell immunodeficiency, severe neutrophil defects, and impaired platelet aggregation.
Sources: Literature
Mendeliome v0.5458 DPM2 Zornitza Stark edited their review of gene: DPM2: Added comment: Further unrelated individual reported, main clinical features were truncal hypotonia, hypertonicity, congenital heart defects, intellectual disability, and generalized muscle wasting.; Changed rating: GREEN; Changed publications: 23109149, 33129689
Mendeliome v0.5455 ALG9 Zornitza Stark Phenotypes for gene: ALG9 were changed from to Congenital disorder of glycosylation, type Il, MIM#608776; Gillessen-Kaesbach-Nishimura syndrome, MIM# 263210; Polycystic kidney disease
Mendeliome v0.5452 ALG9 Zornitza Stark reviewed gene: ALG9: Rating: GREEN; Mode of pathogenicity: None; Publications: 28932688, 25966638, 26453364, 30676690; Phenotypes: Congenital disorder of glycosylation, type Il, MIM#608776, Gillessen-Kaesbach-Nishimura syndrome, MIM# 263210, Polycystic kidney disease; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.5452 ALG8 Zornitza Stark Phenotypes for gene: ALG8 were changed from Congenital disorder of glycosylation, type Ih, MIM# 608104 to Congenital disorder of glycosylation, type Ih, MIM# 608104; Polycystic liver disease 3 with or without kidney cysts, MIM# 617874
Mendeliome v0.5449 ALG8 Zornitza Stark edited their review of gene: ALG8: Added comment: Monoallelic variants are associated with polycystic liver disease.; Changed publications: 26066342, 28375157, 15235028; Changed phenotypes: Congenital disorder of glycosylation, type Ih, MIM# 608104, Polycystic liver disease 3 with or without kidney cysts, MIM# 617874; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.5449 ALG8 Zornitza Stark Phenotypes for gene: ALG8 were changed from to Congenital disorder of glycosylation, type Ih, MIM# 608104
Mendeliome v0.5446 ALG8 Zornitza Stark reviewed gene: ALG8: Rating: GREEN; Mode of pathogenicity: None; Publications: 26066342; Phenotypes: Congenital disorder of glycosylation, type Ih, MIM# 608104; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5446 ALG3 Zornitza Stark Phenotypes for gene: ALG3 were changed from to Congenital disorder of glycosylation, type Id, MIM# 601110
Mendeliome v0.5443 ALG3 Zornitza Stark reviewed gene: ALG3: Rating: GREEN; Mode of pathogenicity: None; Publications: 31067009; Phenotypes: Congenital disorder of glycosylation, type Id, MIM# 601110; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5429 SMARCA1 Zornitza Stark Mode of inheritance for gene: SMARCA1 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5422 SMARCA1 Naomi Baker reviewed gene: SMARCA1: Rating: RED; Mode of pathogenicity: None; Publications: PMID: 26740508, 26539891, 29249292.; Phenotypes: ; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5417 USP9X Zornitza Stark Mode of inheritance for gene: USP9X was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.5416 ALG6 Zornitza Stark Phenotypes for gene: ALG6 were changed from to Congenital disorder of glycosylation, type Ic (MIM#603147)
Mendeliome v0.5413 ALG6 Zornitza Stark reviewed gene: ALG6: Rating: GREEN; Mode of pathogenicity: None; Publications: 10914684, 27498540; Phenotypes: Congenital disorder of glycosylation, type Ic (MIM#603147); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5412 MOGS Zornitza Stark reviewed gene: MOGS: Rating: GREEN; Mode of pathogenicity: None; Publications: 31925597, 30587846, 33058492; Phenotypes: Congenital disorder of glycosylation, type IIb, MIM# 606056; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5408 MYL9 Zornitza Stark gene: MYL9 was added
gene: MYL9 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MYL9 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MYL9 were set to 29453416; 33031641
Phenotypes for gene: MYL9 were set to Megacystis-microcolon-intestinal hypoperistalsis syndrome
Review for gene: MYL9 was set to AMBER
Added comment: Two unrelated families reported.
Sources: Literature
Mendeliome v0.5407 USP9X Paul De Fazio reviewed gene: USP9X: Rating: GREEN; Mode of pathogenicity: None; Publications: 31443933, 26833328; Phenotypes: Mental retardation, X-linked 99, XLR (MIM#300919) and XLD (MIM#300968); Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.5389 DZIP1 Zornitza Stark changed review comment from: One large 4-generation family reported, where missense variant segregated with disease. Two additional individuals identified from a cohort. All variants present at low frequency in population databases. Mouse model recapitulated phenotype.
Sources: Literature; to: Association with MVP: One large 4-generation family reported, where missense variant segregated with disease. Two additional individuals identified from a cohort. All variants present at low frequency in population databases. Mouse model recapitulated phenotype.
Sources: Literature
Mendeliome v0.5387 DZIP1 Zornitza Stark gene: DZIP1 was added
gene: DZIP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DZIP1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DZIP1 were set to 31118289
Phenotypes for gene: DZIP1 were set to Mitral valve prolapse
Review for gene: DZIP1 was set to AMBER
Added comment: One large 4-generation family reported, where missense variant segregated with disease. Two additional individuals identified from a cohort. All variants present at low frequency in population databases. Mouse model recapitulated phenotype.
Sources: Literature
Mendeliome v0.5385 ADH5 Zornitza Stark gene: ADH5 was added
gene: ADH5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ADH5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ADH5 were set to 33147438
Phenotypes for gene: ADH5 were set to Aplastic anaemia; myelodysplasia; short stature
Review for gene: ADH5 was set to GREEN
Added comment: 7 individuals reported with bi-allelic variants in this gene and a Fanconi syndrome-like phenotype. All had aplastic anaemia, 4 developed a myelodysplastic syndrome, and one developed AML. Short stature and abnormal skin pigmentation were additional features.

Note, all also had the ALDH2*2 allele, which is common in East Asian populations, and may be contributory.

Extensive experimental data.
Sources: Literature
Mendeliome v0.5381 LRIF1 Bryony Thompson changed review comment from: A single consanguineous case with a homozygous truncating variant. DZ4Z hypomethylation and increased DUX expression was present in patient cells. siRNA-mediated depletion of LRIF1L in immortalized myoblasts derepressed the DUX4 locus.
Sources: Literature; to: A single consanguineous case with a homozygous truncating variant, and D4Z4 repeat of 13 units on a 4qA haplotype (permissive haplotype). DZ4Z hypomethylation and increased DUX expression was present in patient cells. siRNA-mediated depletion of LRIF1L in immortalized myoblasts derepressed the DUX4 locus.
Sources: Literature
Mendeliome v0.5380 LRIF1 Bryony Thompson gene: LRIF1 was added
gene: LRIF1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LRIF1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LRIF1 were set to 32467133
Phenotypes for gene: LRIF1 were set to Facioscapulohumeral muscular dystrophy
Review for gene: LRIF1 was set to AMBER
Added comment: A single consanguineous case with a homozygous truncating variant. DZ4Z hypomethylation and increased DUX expression was present in patient cells. siRNA-mediated depletion of LRIF1L in immortalized myoblasts derepressed the DUX4 locus.
Sources: Literature
Mendeliome v0.5376 MYRF Zornitza Stark changed review comment from: Cardiac-urogenital syndrome is characterized by partial anomalous pulmonary venous return in association with tracheal anomalies, pulmonary hypoplasia, congenital diaphragmatic hernia, thyroid fibrosis, thymic involution, cleft spleen, penoscrotal hypospadias, and cryptorchidism. More than 10 unrelated individuals reported.; to: Cardiac-urogenital syndrome MIM# 618280 is characterized by partial anomalous pulmonary venous return in association with tracheal anomalies, pulmonary hypoplasia, congenital diaphragmatic hernia, thyroid fibrosis, thymic involution, cleft spleen, penoscrotal hypospadias, and cryptorchidism. More than 10 unrelated individuals reported.
Mendeliome v0.5376 MYRF Zornitza Stark edited their review of gene: MYRF: Added comment: Cardiac-urogenital syndrome is characterized by partial anomalous pulmonary venous return in association with tracheal anomalies, pulmonary hypoplasia, congenital diaphragmatic hernia, thyroid fibrosis, thymic involution, cleft spleen, penoscrotal hypospadias, and cryptorchidism. More than 10 unrelated individuals reported.; Changed publications: 31048900, 31172260, 31266062, 31700225, 29446546, 29446546, 30532227, 31069960; Changed phenotypes: Nanophthalmos and high hyperopia, Cardiac-urogenital syndrome, MIM# 618280
Mendeliome v0.5373 GABBR2 Zornitza Stark commented on gene: GABBR2: At least 3 unrelated individuals reported with DEE 59, MIM# 617904. Neurodevelopmental disorder with poor language and loss of hand skills, MIM# 617903 is an allelic disorder, which is less severe. The two may represent a spectrum.
Mendeliome v0.5372 DNAH2 Zornitza Stark gene: DNAH2 was added
gene: DNAH2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: DNAH2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DNAH2 were set to 30811583
Phenotypes for gene: DNAH2 were set to Spermatogenic failure 45, MIM# 619094
Review for gene: DNAH2 was set to GREEN
Added comment: Three unrelated families reported.
Sources: Expert list
Mendeliome v0.5327 LMX1B Zornitza Stark commented on gene: LMX1B: Nail-patella syndrome (NPS) is an autosomal-dominant disease characterized by dysplastic nails, absent or hypoplastic patellae, elbow dysplasia, and iliac horns. Varying degrees of proteinuria or hematuria are present, and can occasionally progress to chronic renal failure. Some variants in the homeodomain of LMX1B cause isolated nephropathy without nail, patellar or skeletal abnormality (LMX1B-associated nephropathy).

>300 families reported.
Mendeliome v0.5327 LMX1B Zornitza Stark Phenotypes for gene: LMX1B were changed from Nail-patella syndrome (MIM#161200); LMX1B-related nephropathy to Nail-patella syndrome (MIM#161200), MONDO:0008061; LMX1B-related nephropathy
Mendeliome v0.5326 LMX1B Zornitza Stark reviewed gene: LMX1B: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Nail-patella syndrome (MIM#161200), MONDO:0008061, LMX1B-related nephropathy; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.5320 CARD8 Zornitza Stark gene: CARD8 was added
gene: CARD8 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: CARD8 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CARD8 were set to 29408806
Phenotypes for gene: CARD8 were set to Inflammatory bowel disease-30, MIM#619079
Review for gene: CARD8 was set to RED
Added comment: Two individuals from one family reported segregating a missense variant, dominant negative effect postulated.
Sources: Expert list
Mendeliome v0.5317 UBA1 Zornitza Stark edited their review of gene: UBA1: Added comment: Association with VEXAS: 25 men reported with somatic mutations affecting methionine-41 (p.Met41) in UBA1, the major E1 enzyme that initiates ubiquitylation, and an often fatal, treatment-refractory inflammatory syndrome develops in late adulthood, with fevers, cytopaenias, characteristic vacuoles in myeloid and erythroid precursor cells, dysplastic bone marrow, neutrophilic cutaneous and pulmonary inflammation, chondritis, and vasculitis.; Changed publications: 18179898, 32181232, 31932168, 29034082, 27699224, 26028276, 23518311, 33108101; Changed phenotypes: Spinal muscular atrophy, X-linked 2, infantile, MIM# 301830, Autoinflammatory disease, adult onset: VEXAS (vacuoles, E1 enzyme, X-linked, autoinflammatory, somatic)
Mendeliome v0.5276 PLXND1 Zornitza Stark gene: PLXND1 was added
gene: PLXND1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PLXND1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PLXND1 were set to 26068067
Phenotypes for gene: PLXND1 were set to Möbius syndrome
Review for gene: PLXND1 was set to GREEN
Added comment: De novo variants in 3 unrelated individuals with Moebius syndrome with some functional evidence.
Sources: Literature
Mendeliome v0.5274 MYMK Zornitza Stark changed review comment from: Sources: Expert list; to: Carey-Fineman-Ziter syndrome (CFZS) is a multisystem congenital disorder characterized by hypotonia, Moebius sequence (bilateral congenital facial palsy with impairment of ocular abduction), Pierre Robin complex (micrognathia, glossoptosis, and high-arched or cleft palate), delayed motor milestones, and failure to thrive. Intellect has been normal in molecularly confirmed cases. Defect in myoblast fusion. 6 unrelated families reported with CFZ phenotype and bi-allelic MYMK variants. p.Pro91Thr is a common founder variant, which is hypomorphic.
Mendeliome v0.5272 PRKG2 Arina Puzriakova gene: PRKG2 was added
gene: PRKG2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRKG2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PRKG2 were set to 33106379
Phenotypes for gene: PRKG2 were set to Acromesomelic dysplasia
Review for gene: PRKG2 was set to GREEN
Added comment: - PMID: 33106379 (2020) - Distinct homozygous variants in PRKG2 identified in two unrelated individuals, both with a skeletal dysplasia associated with severe short stature due to acromesomelic limb shortening, brachydactyly, mild to moderate platyspondyly and progressively increasing metaphyseal alterations of the long bones.

Functional studies showed both variants result in NMD and disrupt the downstream MAPK signalling pathway in response to FGF2. The role of cGKII, encoded by PRKG2, in skeletal growth has been established in several animal models (references provided in paper).
Sources: Literature
Mendeliome v0.5270 FOXP4 Zornitza Stark gene: FOXP4 was added
gene: FOXP4 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FOXP4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: FOXP4 were set to 33110267
Phenotypes for gene: FOXP4 were set to Neurodevelopmental disorder; multiple congenital abnormalities
Review for gene: FOXP4 was set to GREEN
Added comment: Eight unrelated individuals reported, seven de novo missense, and one individual with a truncating variant. Detailed phenotypic information available on 6. Overlapping features included speech and language delays, growth abnormalities, congenital diaphragmatic hernia (2/6), cervical spine abnormalities, and ptosis. Intellectual disability described as mild in 2, some had normal intellect despite the early speech and language delays.
Sources: Literature
Mendeliome v0.5258 DHX32 Dean Phelan gene: DHX32 was added
gene: DHX32 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DHX32 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DHX32 were set to PMID: 32989326
Phenotypes for gene: DHX32 were set to Intellectual disability, spastic diplegia, dystonia, brain abnormalities
Review for gene: DHX32 was set to AMBER
Added comment: PMID: 32989326 - Large cohort study of cerebral palsy cases identified two de novo variants in two unrelated patients with intellectual disability, one with spastic diplegia, and the other characterised as generalised dystonia. Brain abnormalities were identified also.
Sources: Literature
Mendeliome v0.5254 FBXO31 Kristin Rigbye changed review comment from: 2 unrelated probands with CP harbouring the same de novo missense variant (p.Asp334Asn). The variant affects the cyclin D interaction site, leading to an apparent gain of function of cyclin D degradation, supported by Western blots from patient fibroblasts which showed decreased cyclin D expression.; to: 2 unrelated probands with CP harbouring the same de novo missense variant (p.Asp334Asn). The variant affects the cyclin D interaction site, leading to an apparent gain of function of cyclin D degradation, supported by Western blots from patient fibroblasts which showed decreased cyclin D expression.

Extended patient phenotypes: Spastic diplegia, with esotropia, ID, dysarthria, mixed receptive/expressive language disorder, ADHD, cleft palate, intestinal malrotation and midgut volvulus (patient 1); Spastic paraplegia with ventricular dilation and thin corpus callosum, ID, attention deficit, anxiety, language impairments, strabismus, severe constipation (patient 2).
Mendeliome v0.5251 RHOB Crystle Lee gene: RHOB was added
gene: RHOB was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: RHOB was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: RHOB were set to 32989326
Phenotypes for gene: RHOB were set to Cerebral Palsy (PMID:32989326)
Mode of pathogenicity for gene: RHOB was set to Other
Review for gene: RHOB was set to AMBER
Added comment: Candidate disease-causing gene for CP. Recurrent de novo missense variant reported in 2 unrelated families with supporting functional studies.
Sources: Expert list
Mendeliome v0.5244 STN1 Zornitza Stark edited their review of gene: STN1: Added comment: Third unrelated family reported, promote to Green.; Changed rating: GREEN; Changed publications: 27432940, 32627942
Mendeliome v0.5243 ITPR3 Zornitza Stark gene: ITPR3 was added
gene: ITPR3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ITPR3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ITPR3 were set to 32949214
Phenotypes for gene: ITPR3 were set to Charcot-Marie-Tooth disease
Review for gene: ITPR3 was set to AMBER
Added comment: Two unrelated families reported: variant segregated in four affected individuals in one family and was de novo in the second family where there was a single affected person. Some evidence for dominant-negative effect.
Sources: Literature
Mendeliome v0.5240 AMOTL1 Zornitza Stark gene: AMOTL1 was added
gene: AMOTL1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: AMOTL1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: AMOTL1 were set to 33026150
Phenotypes for gene: AMOTL1 were set to Cleft lip and palate; imperforate anus; dysmorphism
Review for gene: AMOTL1 was set to RED
Added comment: Two unrelated families reported. In one, the variant was identified in parent and child who had orofacial cleft and cardiac abnormalities. Second report in PMID 33026150, de novo missense variant and cleft lip/palate, imperforate anus and dysmorphism. Mouse model does not recapitulate phenotype.
Sources: Literature
Mendeliome v0.5238 KIRREL1 Zornitza Stark gene: KIRREL1 was added
gene: KIRREL1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KIRREL1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: KIRREL1 were set to 31472902
Phenotypes for gene: KIRREL1 were set to Steroid-resistant nephrotic syndrome
Review for gene: KIRREL1 was set to AMBER
Added comment: Two unrelated families reported with bi-allelic variants and limited functional data.
Sources: Literature
Mendeliome v0.5236 GFRA1 Zornitza Stark gene: GFRA1 was added
gene: GFRA1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GFRA1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GFRA1 were set to 33020172
Phenotypes for gene: GFRA1 were set to Renal agenesis
Review for gene: GFRA1 was set to AMBER
Added comment: Two unrelated families reported with bi-allelic LOF variants identified in individuals with bilateral renal agenesis. GFRA1 gene encodes a receptor on the Wolffian duct that regulates ureteric bud outgrowth in the development of a functional renal system.
Sources: Literature
Mendeliome v0.5229 PRKAR1B Konstantinos Varvagiannis gene: PRKAR1B was added
gene: PRKAR1B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRKAR1B was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: PRKAR1B were set to https://doi.org/10.1101/2020.09.10.20190314; 25414040
Phenotypes for gene: PRKAR1B were set to Global developmental delay; Intellectual disability; Autism; Attention deficit hyperactivity disorder; Aggressive behavior; Abnormality of movement; Upslanted palpebral fissure
Penetrance for gene: PRKAR1B were set to unknown
Review for gene: PRKAR1B was set to AMBER
Added comment: Please consider inclusion of this gene with amber rating pending publication of the preprint and/or additional evidence.

Marbach et al. (2020 - medRxiv : https://doi.org/10.1101/2020.09.10.20190314 - last author : C. Schaaf) report 6 unrelated individuals with heterozygous missense PRKAR1B variants.

All presented formal ASD diagnosis (6/6), global developmental delay (6/6) and intellectual disability (all - formal evaluations were lacking though). Additional features included neurologic anomalies (movement disorders : dyspraxia, apraxia, clumsiness in all, with tremor/dystonia or involuntary movements as single occurrences). Three displayed high pain tolerance. Regression in speech was a feature in two. Additional behavior anomalies included ADHD (4-5/6) or aggression (3/6). There was no consistent pattern of malformations, physical anomalies or facial features (with the exception of uplsanted palpebral fissures reported in 4).

3 different missense variants were identified (NM_00116470:c.1003C>T - p.Arg335Trp, c.586G>A - p.Glu196Lys, c.500_501delAAinsTT - p.Gln167Leu) with Arg355Trp being a recurrent one within this cohort (4/6 subjects). A possible splicing effect may apply for the MNV. All variants are absent from gnomAD and the SNVs had CADD scores > 24.

In all cases were parental samples were available (5/6), the variant had occurred as a de novo event.

Protein kinase A (PKA) is a tetrameric holoenzyme formed by the association of 2 catalytic (C) subunits with a regulatory (R) subunit dimer. Activation of PKA is achieved through binding of 2 cAMP molecules to each R-subunit, and unleashing(/dissociation) of C-subunits to engage substrates. PRKACA/B genes encode the Cα- and Cβ-subunits while the 4 functionally non-redundant regulatory subunits are encoded by PRKAR1A/1B/2A/2B genes. As the authors comment, the RIβ subunit is primarily expressed in brain with higher expression in cortex and hypothalamus.

The functional consequences of the variants at cellular level were not studied.

Previous studies have demonstrated that downregulation of RIβ in murine hippocampal cultures, reduced phosphorylation of CREB, a transcription factor involved in long-term memory formation. The authors speculate that a similar effect on cAMP/PKA/CREB cascade may mediate the cognitive effects in humans. RIβ deficient mice also display diminished nociceptive pain, similar to the human phenotype. [Several refs provided].

The authors cite the study by Kaplanis et al (2020 - PMID: 33057194), where in a large sample of 31,058 trio exomes of children with developmental disorders, PRKAR1B was among the genes with significant enrichment for de novo missense variants. [The gene has a pLI score of 0.18 in gnomAD / o/e = 0.26 - so pLoF variants may not be deleterious].

Please note that a specific PRKAR1B variant (NM_002735.2:c.149T>G - p.Leu50Arg) has been previous reported to segregate with a late-onset neurodegenerative disorder characterized by dementia and/or parkinsonism within a large pedigree with 12 affected individuals [Wong et al 2014 - PMID: 25414040].
Sources: Literature
Mendeliome v0.5222 MPP5 Konstantinos Varvagiannis gene: MPP5 was added
gene: MPP5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MPP5 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: MPP5 were set to 33073849
Phenotypes for gene: MPP5 were set to Global developmental delay; Intellectual disability; Delayed speech and language development; Developmental regression; Behavioral abnormality
Penetrance for gene: MPP5 were set to unknown
Review for gene: MPP5 was set to GREEN
Added comment: Sterling et al (2020 - PMID: 33073849) provide information on the phenotype of 3 individuals with de novo MPP5 variants.

Common features included global developmental delay, intellectual disability (3/3 - severe in 2/3), speech delay/regression (the latter in at least 2) and behavioral abnormalities. Variable other features were reported, among others microcephaly (1/3), abnormal vision (1/3 : CVI, retinal dystrophy, nystagmus), brain MRI abnormalities (2/3), late-onset seizures (1/3). These subjects displayed variable and non-specific dysmorphic features.

All were investigated by exome sequencing (previous investigations not mentioned).

One subject was found to harbor a de novo mosaic (5/25 reads) stopgain variant, further confirmed by Sanger sequencing [NM_022474.4:c.1555C>T - p.(Arg519Ter). The specific variant is reported once in gnomAD (1/251338). Two de novo missense variants were identified in the remaining individuals [c.1289A>G - p.Glu430Gly / c.974A>C - p.His325Pro). All variants had in silico predictions in favor of a deleterious effect (CADD score >24).

The authors comment that MPP5 encodes an apical complex protein with asymmetric localization to the apical side of polarized cells. It is expressed in brain, peripheral nervous system and other tissues. MPP5 is a member of the membrane-associated guanylate kinase family of proteins (MAGUK p55 subfamily), determining cell polarity at tight junctions.

Previous animal models suggest that complete Mpp5(Pals1) KO in mice leads to near absence of cerebral cortical neurons. Htz KO display reduction in size of cerebral cortex and hippocampus. The gene is expressed in proliferating cell populations of cerebellum and important for establishment cerebellar architecture. Conditional KO of Mpp5(Pals1) in retinal progenitor cells mimics the retinal pathology observed in LCA. [Several refs. provided]

The authors studied a heterozygous CNS-specific Mpp5 KO mouse model. These mice presented microcephaly, decreased cerebellar volume and cortical thickness, decreased ependymal cells and Mpp5 at the apical surface of cortical vertrical zone. The proportion of cortical cells undergoing apoptotic cell death was increased. Mice displayed behavioral abnormalities (hyperactivity) and visual deficits, with ERG traces further suggesting retinal blindness.

Overall the mouse model was thought to recapitulate the behavioral abnormalities observed in affected subjects as well as individual rare features such as microcephaly and abnormal vision.

Haploinsufficiency (rather than a dominant negative effect) is favored as the underlying disease mechanism. This is also in line with a dose dependent effect observed in mice.
Sources: Literature
Mendeliome v0.5216 SCYL1 Zornitza Stark commented on gene: SCYL1: Autosomal recessive spinocerebellar ataxia-21 is a neurologic disorder characterized by onset of cerebellar ataxia associated with cerebellar atrophy in early childhood. Affected individuals also have recurrent episodes of liver failure in the first decade, resulting in chronic liver fibrosis, as well as later onset of a peripheral neuropathy. Mild learning disabilities may also occur. More than 5 unrelated families reported.
Mendeliome v0.5204 ASCL1 Zornitza Stark Phenotypes for gene: ASCL1 were changed from to Central hypoventilation syndrome, congenital, MIM# 209880
Mendeliome v0.5200 ASCL1 Zornitza Stark reviewed gene: ASCL1: Rating: AMBER; Mode of pathogenicity: None; Publications: 14532329; Phenotypes: Central hypoventilation syndrome, congenital, MIM# 209880; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.5198 ODC1 Zornitza Stark commented on gene: ODC1: Fifth individual reported in PMID 30239107: de novo nonsense variant identified, molecular modeling suggested that due to lack of a C terminus in the mutant protein, antizyme binding does not induce ODC degradation, leading to accumulation of active protein.
Mendeliome v0.5192 LRRC32 Zornitza Stark Phenotypes for gene: LRRC32 were changed from Intellectual disability; cleft palate; proliferative retinopathy to Cleft palate, proliferative retinopathy, and developmental delay (CPPRDD) syndrome, MIM# 619074
Mendeliome v0.5191 LRRC32 Zornitza Stark edited their review of gene: LRRC32: Changed phenotypes: Cleft palate, proliferative retinopathy, and developmental delay (CPPRDD) syndrome, MIM# 619074
Mendeliome v0.5188 NUS1 Zornitza Stark Phenotypes for gene: NUS1 were changed from Epilepsy; intellectual disability to Congenital disorder of glycosylation, type 1aa 617082; Mental retardation, autosomal dominant 55, with seizures 617831
Mendeliome v0.5185 COG8 Zornitza Stark Phenotypes for gene: COG8 were changed from to Congenital disorder of glycosylation, type IIh, MIM# 611182
Mendeliome v0.5183 COG8 Zornitza Stark reviewed gene: COG8: Rating: GREEN; Mode of pathogenicity: None; Publications: 17220172, 28619360; Phenotypes: Congenital disorder of glycosylation, type IIh, MIM# 611182; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5174 NUS1 Elena Savva reviewed gene: NUS1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 25066056, 29100083, 31656175, 32485575; Phenotypes: ?Congenital disorder of glycosylation, type 1aa 617082, Mental retardation, autosomal dominant 55, with seizures 617831; Mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal; Current diagnostic: yes
Mendeliome v0.5174 COG8 Elena Savva reviewed gene: COG8: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 30690882, 17331980; Phenotypes: Congenital disorder of glycosylation, type IIh 611182; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5171 SLC35A3 Zornitza Stark Phenotypes for gene: SLC35A3 were changed from Arthrogryposis, mental retardation, and seizures; OMIM #615553 to Arthrogryposis, mental retardation, and seizures OMIM #615553; Skeletal dysplasia; Congenital disorder of glycosylation
Mendeliome v0.5168 SLC35A3 Zornitza Stark edited their review of gene: SLC35A3: Added comment: Third unrelated family reported in PMID 28777481 with prenatally diagnosed anomalous vertebrae, including butterfly, and hemivertebrae throughout the spine, as well as cleft palate, micrognathia, patent foramen ovale, patent ductus arteriosus, posterior embryotoxon, short limbs, camptodactyly, talipes valgus, rocker bottom feet, and facial dysmorphism including proptosis, nevus flammeus, and a cupped left ear. Unclear if this is a distinct phenotype (note Holstein cows with variants in this gene have a skeletal phenotype) or part of a spectrum for a CDG. However, abnormal protein glycosylation, consistent with a defective Golgi UDP-GlcNAc transporter demonstrated, so overall, promoted to Green for CDG.; Changed rating: GREEN; Changed publications: 28777481, 28328131, 24031089; Changed phenotypes: Arthrogryposis, mental retardation, and seizures OMIM #615553, Skeletal dysplasia, Congenital disorder of glycosylation; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5139 CTNNA3 Bryony Thompson gene: CTNNA3 was added
gene: CTNNA3 was added to Mendeliome. Sources: ClinGen
Mode of inheritance for gene: CTNNA3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CTNNA3 were set to 23136403; 21254927; 22421363; 30415094; 31539150
Phenotypes for gene: CTNNA3 were set to Arrhythmogenic right ventricular cardiomyopathy; Arrhythmogenic right ventricular dysplasia, familial, 13 MIM#615616
Review for gene: CTNNA3 was set to AMBER
Added comment: Gene is classified as Limited by the ClinGen ARVC GCEP (Classification - 08/06/2019). PMID: 23136403 - an assumed de novo missense (V94D) was identified in an Italian proband with arrhythmogenic right ventricular dysplasia. An inframe deletion (Leu765del) was identified in a proband with arrhythmogenic right ventricular dysplasia, and was also present in the proband's asymptomatic father and paternal aunt, who had mild right ventricular dilation on echocardiography and increased trabeculations in the right ventricular apex on MRI, respectively, as well as in the aunt's asymptomatic son. There was supporting in vitro functional assay evidence for both variants. PMID: 21254927 - a missense variant was found in one of 55 Danish ARVD patients, but was found 37 times in 276,338 (1 homozygous) reference alleles in gnomAD making it less likely as a causal variant. PMID: 22421363 - null mice exhibit progressive dilated cardiomyopathy, gap junction remodelling, and increased sensitivity to ventricular arrhythmia following acute ischaemia, but not spontaneous ARVC. Additional publications identified - PMID: 30415094 - a VUS identified in a sudden unexpected death case with slight LV hypertrophy. PMID: 31539150 - 2 VUS and a nonsense variant identified in 3 probands with atrial fibrillation, with the nonsense variant segregating in an affected first-degree relative.
Sources: ClinGen
Mendeliome v0.5128 COX5A Zornitza Stark Phenotypes for gene: COX5A were changed from pulmonary arterial hypertension; lactic acidemia; failure to thrive; isolated complex IV deficiency to Mitochondrial complex IV deficiency, nuclear type 20, MIM#619064; pulmonary arterial hypertension; lactic acidemia; failure to thrive; isolated complex IV deficiency
Mendeliome v0.5127 COX5A Zornitza Stark edited their review of gene: COX5A: Changed phenotypes: Mitochondrial complex IV deficiency, nuclear type 20, MIM#619064, pulmonary arterial hypertension, lactic acidemia, failure to thrive, isolated complex IV deficiency
Mendeliome v0.5121 COX4I1 Zornitza Stark gene: COX4I1 was added
gene: COX4I1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: COX4I1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COX4I1 were set to 28766551; 22592081; 31290619
Phenotypes for gene: COX4I1 were set to Mitochondrial complex IV deficiency, nuclear type 16, MIM#619060
Review for gene: COX4I1 was set to AMBER
Added comment: Two unrelated families reported.

Two more variants reported in PMID: 22592081: one is non-coding and the other rare missense, appear to have been identified in separate individuals, i.e. heterozygous in each individual.
Sources: Expert list
Mendeliome v0.5102 PRKACB Konstantinos Varvagiannis gene: PRKACB was added
gene: PRKACB was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRKACB was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: PRKACB were set to 33058759
Phenotypes for gene: PRKACB were set to Postaxial hand polydactyly; Postaxial foot polydactyly; Common atrium; Atrioventricular canal defect; Narrow chest; Abnormality of the teeth; Intellectual disability
Penetrance for gene: PRKACB were set to unknown
Mode of pathogenicity for gene: PRKACB was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments
Review for gene: PRKACB was set to GREEN
Added comment: Palencia-Campos et al (2020 - PMID: 33058759) report on the phenotype of 3 individuals heterozygous for PRKACA and 4 individuals heterozygous for PRKACB pathogenic variants.

The most characteristic features in all individuals with PRKACA/PRKACB mutation, included postaxial polydactyly of hands (6/7 bilateral, 1/7 unilateral) and feet (4/7 bilateral, 1/7 unilateral), brachydactyly and congenital heart defects (CHD 5/7) namely a common atrium or AVSD. Two individuals with PRKACA variant who did not have CHD had offspring with the same variant and an AVSD.

Other variably occurring features included short stature, limbs, narrow chest, abnormal teeth, oral frenula, nail dysplasia. One individual with PRKACB variant presented tumors.

Intellectual disability was reported in 2/4 individuals with PRKACB variant (1/4: mild, 1/4: severe). The 3 individuals with PRKACA variant did not present ID.

As the phenotype was overall suggestive of Ellis-van Creveld syndrome (or the allelic Weyers acrofacial dysostosis), although these diagnoses were ruled out following analysis of EVC and EVC2 genes.

WES was carried out in all.

PRKACA : A single heterozygous missense variant was identified in 3 individuals from 3 families (NM_002730.4:c.409G>A / p.Gly137Arg) with 1 of the probands harboring the variant in mosaic state (28% of reads) and having 2 similarly affected offspring. The variant was de novo in one individual and inherited in a third one having a similarly affected fetus (narrow thorax, postaxial polyd, AVSD).

PRKACB : 4 different variants were identified (NM_002731.3: p.His88Arg/Asn, p.Gly235Arg, c.161C>T - p.Ser54Leu). One of the individuals was mosaic for the latter variant, while in all other cases the variant had occurred de novo.

Protein kinase A (PKA) is a tetrameric holoenzyme formed by the association of 2 catalytic (C) subunits with a regulatory (R) subunit dimer. Activation of PKA is achieved through binding of 2 cAMP molecules to each R-subunit, and unleashing(/dissociation) of C-subunits to engage substrates. PRKACA/B genes encode the Cα- and Cβ-subunits while the 4 functionally non-redundant regulatory subunits are encoded by PRKAR1A/1B/2A/2B genes.

The authors provide evidence that the variants confer increased sensitivity of PKA holoenzymes to activation by cAMP (compared to wt).

By performing ectopic expression of wt or mt PRKACA/B (variants studied : PRKACA p.Gly137Arg / PRKACB p.Gly235Arg) in NIH 3T3 fibroblasts, the authors demonstrate that inhibition of hedgehog signaling likely underlyies the developmental defects observed in affected individuals.

As for PRKACA, the authors cite another study where a 31-month old female with EvC syndrome diagnosis was found to harbor the aforementioned variant (NM_001304349.1:c.637G>A:p.Gly213Arg corresponding to NM_002730.4:c.409G>A / p.Gly137Arg) as a de novo event. Without additional evidence at the time, the variant was considered to be a candidate for this subject's phenotype (Monies et al 2019 – PMID: 31130284).
Sources: Literature
Mendeliome v0.5102 PRKACA Konstantinos Varvagiannis gene: PRKACA was added
gene: PRKACA was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRKACA was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: PRKACA were set to 33058759; 31130284
Phenotypes for gene: PRKACA were set to Postaxial hand polydactyly; Postaxial foot polydactyly; Common atrium; Atrioventricular canal defect; Narrow chest; Abnormality of the teeth; Intellectual disability
Penetrance for gene: PRKACA were set to unknown
Mode of pathogenicity for gene: PRKACA was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments
Review for gene: PRKACA was set to GREEN
Added comment: Palencia-Campos et al (2020 - PMID: 33058759) report on the phenotype of 3 individuals heterozygous for PRKACA and 4 individuals heterozygous for PRKACB pathogenic variants.

The most characteristic features in all individuals with PRKACA/PRKACB mutation, included postaxial polydactyly of hands (6/7 bilateral, 1/7 unilateral) and feet (4/7 bilateral, 1/7 unilateral), brachydactyly and congenital heart defects (CHD 5/7) namely a common atrium or AVSD. Two individuals with PRKACA variant who did not have CHD had offspring with the same variant and an AVSD.

Other variably occurring features included short stature, limbs, narrow chest, abnormal teeth, oral frenula, nail dysplasia. One individual with PRKACB variant presented tumors.

Intellectual disability was reported in 2/4 individuals with PRKACB variant (1/4: mild, 1/4: severe). The 3 individuals with PRKACA variant did not present ID.

As the phenotype was overall suggestive of Ellis-van Creveld syndrome (or the allelic Weyers acrofacial dysostosis), although these diagnoses were ruled out following analysis of EVC and EVC2 genes.

WES was carried out in all.

PRKACA : A single heterozygous missense variant was identified in 3 individuals from 3 families (NM_002730.4:c.409G>A / p.Gly137Arg) with 1 of the probands harboring the variant in mosaic state (28% of reads) and having 2 similarly affected offspring. The variant was de novo in one individual and inherited in a third one having a similarly affected fetus (narrow thorax, postaxial polyd, AVSD).

PRKACB : 4 different variants were identified (NM_002731.3: p.His88Arg/Asn, p.Gly235Arg, c.161C>T - p.Ser54Leu). One of the individuals was mosaic for the latter variant, while in all other cases the variant had occurred de novo.

Protein kinase A (PKA) is a tetrameric holoenzyme formed by the association of 2 catalytic (C) subunits with a regulatory (R) subunit dimer. Activation of PKA is achieved through binding of 2 cAMP molecules to each R-subunit, and unleashing(/dissociation) of C-subunits to engage substrates. PRKACA/B genes encode the Cα- and Cβ-subunits while the 4 functionally non-redundant regulatory subunits are encoded by PRKAR1A/1B/2A/2B genes.

The authors provide evidence that the variants confer increased sensitivity of PKA holoenzymes to activation by cAMP (compared to wt).

By performing ectopic expression of wt or mt PRKACA/B (variants studied : PRKACA p.Gly137Arg / PRKACB p.Gly235Arg) in NIH 3T3 fibroblasts, the authors demonstrate that inhibition of hedgehog signaling likely underlyies the developmental defects observed in affected individuals.

As for PRKACA, the authors cite another study where a 31-month old female with EvC syndrome diagnosis was found to harbor the aforementioned variant (NM_001304349.1:c.637G>A:p.Gly213Arg corresponding to NM_002730.4:c.409G>A / p.Gly137Arg) as a de novo event. Without additional evidence at the time, the variant was considered to be a candidate for this subject's phenotype (Monies et al 2019 – PMID: 31130284).
Sources: Literature
Mendeliome v0.5079 ALG2 Zornitza Stark Phenotypes for gene: ALG2 were changed from to Myasthenic syndrome, congenital, 14, with tubular aggregates, MIM# 616228; Congenital disorder of glycosylation, type Ii, MIM# 607906
Mendeliome v0.5075 ALG2 Zornitza Stark reviewed gene: ALG2: Rating: AMBER; Mode of pathogenicity: None; Publications: 23404334, 24461433, 12684507; Phenotypes: Myasthenic syndrome, congenital, 14, with tubular aggregates, MIM# 616228, Congenital disorder of glycosylation, type Ii, MIM# 607906; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.5069 PTCD3 Zornitza Stark Phenotypes for gene: PTCD3 were changed from Intellectual disability; optic atrophy; Leigh-like syndrome to Combined oxidative phosphorylation deficiency-51, MIM#619057; Intellectual disability; optic atrophy; Leigh-like syndrome
Mendeliome v0.5068 PTCD3 Zornitza Stark edited their review of gene: PTCD3: Changed phenotypes: Combined oxidative phosphorylation deficiency-51, MIM#619057, Intellectual disability, optic atrophy, Leigh-like syndrome
Mendeliome v0.5066 TCF21 Bryony Thompson reviewed gene: TCF21: Rating: RED; Mode of pathogenicity: None; Publications: 16156022, 10769282, 24875298; Phenotypes: Sensorineural hearing loss, dilated cardiomyopathy; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.5066 SETD1A Zornitza Stark changed review comment from: OMIM has assigned a second phenotype in relation to the syndromic ID cohort reported in PMID 32346159. All variants were predicted to disrupt or delete the SET catalytic domain, and LOF is the established mechanism.

In addition, there are 3 families reported with a predominantly seizure phenotype without ID, PMID 31197650. All the variants are missense and mechanism of pathogenicity is not clearly established, hence it is difficult to know whether these are two distinct conditions or part of a spectrum of severity for SETD1A-related disorders.; to: OMIM has assigned a second phenotype in relation to the syndromic ID cohort reported in PMID 32346159. All variants were predicted to disrupt or delete the SET catalytic domain, and LOF is the established mechanism.

In addition, there are 4 families reported with a predominantly seizure phenotype without ID, PMID 31197650. All the variants are missense and mechanism of pathogenicity is not clearly established, hence it is difficult to know whether these are two distinct conditions or part of a spectrum of severity for SETD1A-related disorders.
Mendeliome v0.5065 SETD1A Zornitza Stark edited their review of gene: SETD1A: Added comment: OMIM has assigned a second phenotype in relation to the syndromic ID cohort reported in PMID 32346159. All variants were predicted to disrupt or delete the SET catalytic domain, and LOF is the established mechanism.

In addition, there are 3 families reported with a predominantly seizure phenotype without ID, PMID 31197650. All the variants are missense and mechanism of pathogenicity is not clearly established, hence it is difficult to know whether these are two distinct conditions or part of a spectrum of severity for SETD1A-related disorders.; Changed phenotypes: Epilepsy, early-onset, with or without developmental delay, MIM# 618832, Neurodevelopmental disorder with speech impairment and dysmorphic facies, MIM# 619056
Mendeliome v0.5050 ITSN2 Elena Savva gene: ITSN2 was added
gene: ITSN2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ITSN2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ITSN2 were set to PMID: 29773874
Phenotypes for gene: ITSN2 were set to Nephrotic syndrome
Review for gene: ITSN2 was set to GREEN
Added comment: PMID: 29773874: 2 families (3 patients) with homozygous missense or chet missense/PTC + null mice recapitulating the human phenotype.
Functional analysis of all variants shows an inability for Cdc42 activation as shown by wildtype overexpression
Sources: Literature
Mendeliome v0.5003 PPP1R13L Zornitza Stark gene: PPP1R13L was added
gene: PPP1R13L was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PPP1R13L was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PPP1R13L were set to 32666529; 28864777
Phenotypes for gene: PPP1R13L were set to Dilated cardiomyopathy, onset in infancy
Review for gene: PPP1R13L was set to GREEN
Added comment: Four families reported in PMID 28864777, but same homozygous variant, identity by descent. Five unrelated families reported in PMID 32666529. Severe progressive DCM with onset in infancy.
Sources: Expert list
Mendeliome v0.4998 CSNK1G1 Zornitza Stark gene: CSNK1G1 was added
gene: CSNK1G1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CSNK1G1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CSNK1G1 were set to 33009664
Phenotypes for gene: CSNK1G1 were set to Global developmental delay; Intellectual disability; Autism; Seizures
Review for gene: CSNK1G1 was set to GREEN
Added comment: Borderline Green/Amber rating.

Gold et al (2020 - PMID: 33009664) report 5 individuals with CSNK1G1 variants, including updated information on a previously reported subject (Martin et al 2014 - PMID: 24463883).

Features included DD (5/5) with associated expressive language delay, ASD (in at least 3/5), seizures (2/5), dysmorphic facial features (4/5 arched eyebrows, 3/5 prominent central incisors, 2/5 epicanthus) and limb anomalies (2/5 - proximally placed thumb, 5th f. clinodactyly, asymmetric overgrowth - the other individual had tapering fingers). GI problems were observed in 4/5. Two individuals had macrocephaly and one had microcephaly. There was no formal developmental assessment although ID might be implied in at least 3 individuals (p1: 20y - single words/regression in walking following a seizure episode, p2: 8y - first words at 5y, assistance to feed, dress and bathe, ASD, p4: 13y - regression, assistance to feed and dress).

CSNK1G1 encodes the gamma-1 isoform of casein kinase 1, a protein involved in growth and cell morphogenesis. The gene has ubiquitous expression, incl. brain. As commented, in brain it regulates phosphorylation of NMDA receptors, playing a role in synaptic transmission (4 articles cited).

One individual had a 1.2 kb deletion spanning exon 3 of CSNK1G1 [chr15:64550952-64552120 - GRCh37]. Parental samples were unavailable for this individual. Four individuals were found to harbor de novo CSNK1G1 variants [NM_022048.3: c.688C>T - p.(Arg230Trp) dn | c.1255C>T - p.(Gln419*) dn | c.1214+5G>A dn with in silico predictions in favor of splice disruption | c.419C>T - p.(Thr140Met) dn].

Arg230Trp is however present once in gnomAD. The stopgain variant is located in the last exon and predicted to skip NMD.

There were no variant studies performed.

The Drosophila gish gene encodes a CK1γ homolog with preferential expression in the mushroom body. Heterozygous and homozygous mutants exhibit impairment in memory retention, more severe in homozygous flies. gish was also identified as a seizure modifier in a fly epilepsy model (heterozygous para mt flies).
Sources: Literature
Mendeliome v0.4991 SREBF1 Zornitza Stark edited their review of gene: SREBF1: Added comment: HMD phenotype: 5 unrelated families reported with heterozygous variants at same residue (p.Arg557Cys and p.Arg557His) and a panepithelial defect involving the oral, nasal, conjunctival, vaginal, cervical, perineal, urethral, and bladder mucosa. Individuals developed cataracts, blindness, nonscarring alopecia, perineal psoriasiform lesions, and follicular keratoses.; Changed publications: 32497488, 31790666, 32902915; Changed phenotypes: IFAP (ichthyosis follicularis, atrichia, and photophobia) syndrome 2, MIM619016, Mucoepithelial dysplasia, hereditary, MIM#158310
Mendeliome v0.4910 LMX1B Zornitza Stark Phenotypes for gene: LMX1B were changed from to Nail-patella syndrome (MIM#161200); LMX1B-related nephropathy
Mendeliome v0.4903 LMX1B Teresa Zhao reviewed gene: LMX1B: Rating: GREEN; Mode of pathogenicity: None; Publications: 27450397; Phenotypes: Nail-patella syndrome (MIM#161200), LMX1B-related nephropathy; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.4903 JPH2 Zornitza Stark Phenotypes for gene: JPH2 were changed from to Cardiomyopathy, hypertrophic, MIM#613873; dilated cardiomyopathy
Mendeliome v0.4899 JPH2 Zornitza Stark reviewed gene: JPH2: Rating: AMBER; Mode of pathogenicity: None; Publications: 30681346, 17509612, 23973696, 26869393, 28393127, 30235249, 31227780; Phenotypes: Cardiomyopathy, hypertrophic, MIM#613873, dilated cardiomyopathy; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.4886 KIRREL3 Zornitza Stark gene: KIRREL3 was added
gene: KIRREL3 was added to Mendeliome. Sources: Expert list
refuted tags were added to gene: KIRREL3.
Mode of inheritance for gene: KIRREL3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KIRREL3 were set to 19012874
Phenotypes for gene: KIRREL3 were set to Intellectual disability
Review for gene: KIRREL3 was set to RED
Added comment: Variants associated with ID have now been re-classified based on population frequency.
Sources: Expert list
Mendeliome v0.4878 MAG Zornitza Stark changed review comment from: Spastic paraplegia-75 is an autosomal recessive, slowly progressive neurodegenerative disorder characterized by onset of spastic paraplegia and cognitive impairment in childhood. Eight unrelated families reported.; to: Spastic paraplegia-75 is an autosomal recessive, slowly progressive neurodegenerative disorder characterized by onset of spastic paraplegia and cognitive impairment in childhood. Eight unrelated families reported with variable combinations of psychomotor delay, ataxia, eye movement abnormalities, spasticity, dystonia, and neuropathic symptoms.
Mendeliome v0.4874 ITFG2 Zornitza Stark gene: ITFG2 was added
gene: ITFG2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ITFG2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ITFG2 were set to 28397838; https://doi.org/10.1038/s41525-020-00150-z
Phenotypes for gene: ITFG2 were set to Neurodevelopmental abnormality; Intellectual disability; Developmental regression; Ataxia
Review for gene: ITFG2 was set to AMBER
Added comment: ITFG2 was suggested to be a candidate gene for autosomal recessive ID in the study by Harripaul et al (2018 - PMID: 28397838). The authors performed microarray and exome sequencing in 192 consanguineous families and identified a homozygous ITGF2 stopgain variant (NM_018463.3:c.472G>T / p.Glu158*) along with 3 additional variants segregating with ID within an investigated family (PK51). Cheema et al (2020 - https://doi.org/10.1038/s41525-020-00150-z) report briefly on a male, born to consanguineous parents presenting with NDD, seizures, regression and ataxia. There was a similarly affected female sibling. Evaluation of ROH revealed a homozygous ITFG2 nonsense variant [NM_018463.3:c.361C>T / p.(Gln121*)]. Families in this study were investigated by trio WES or WGS. Evaluation of data of the same lab revealed 3 additional unrelated subjects with overlapping phenotypes, notably NDD and ataxia. These individuals were - each - homozygous for pLoF variants [NM_018463.3:c.848-1G>A; NM_018463.3:c.704dupC, p.(Ala236fs), NM_018463.3:c.1000_1001delAT, p.(Ile334fs)]. As discussed in OMIM, ITFG2 encodes a subunit of the KICSTOR protein complex, having a role in regulating nutrient sensing by MTOR complex-1 (Wolfson et al 2017 - PMID : 28199306).

Rated Amber as Cheema et al report on diagnostic outcomes and multiple candidate genes as part of a heterogenous cohort and details are therefore limited.
Sources: Literature
Mendeliome v0.4872 SHMT2 Zornitza Stark gene: SHMT2 was added
gene: SHMT2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SHMT2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SHMT2 were set to 33015733
Phenotypes for gene: SHMT2 were set to Congenital microcephaly; Infantile axial hypotonia; Spastic paraparesis; Global developmental delay; Intellectual disability; Abnormality of the corpus callosum; Abnormal cortical gyration; Hypertrophic cardiomyopathy; Abnormality of the face; Proximal placement of thumb; 2-3 toe syndactyly
Review for gene: SHMT2 was set to GREEN
Added comment: García‑Cazorla et al. (2020 - PMID: 33015733) report 5 individuals (from 4 families) with a novel brain and heart developmental syndrome caused by biallelic SHMT2 pathogenic variants.

All affected subjects presented similar phenotype incl. microcephaly at birth (5/5 with OFC < -2 SD though in 2/5 cases N OFC was observed later), DD and ID (1/5 mild-moderate, 1/5 moderate, 3/5 severe), motor dysfunction in the form of spastic (5/5) paraparesis, ataxia/dysmetria (3/4), intention tremor (in 3/?) and/or peripheral neuropathy (2 sibs). They exhibited corpus callosum hypoplasia (5/5) and perisylvian microgyria-like pattern (4/5). Cardiac problems were reported in all, with hypertrophic cardiomyopathy in 4/5 (from 3 families) and atrial-SD in the 5th individual (1/5). Common dysmorphic features incl. long palpebral/fissures, eversion of lateral third of lower eylids, arched eyebrows, long eyelashes, thin upper lip, short Vth finger, fetal pads, mild 2-3 toe syndactyly, proximally placed thumbs.

Biallelic variants were identified following exome sequencing in all (other investigations not mentioned). Identified variants were in all cases missense SNVs or in-frame del, which together with evidence from population databases and mouse model might suggest a hypomorphic effect of variants and intolerance/embryonic lethality for homozygous LoF ones.

SHMT2 encodes the mitohondrial form of serine hydroxymethyltransferase. The enzyme transfers one-carbon units from serine to tetrahydrofolate (THF) and generates glycine and 5,10,methylene-THF.

Mitochondrial defect was suggested by presence of ragged red fibers in myocardial biopsy of one patient. Quadriceps and myocardial biopsies of the same individual were overall suggestive of myopathic changes.

While plasma metabolites were within N range and SHMT2 protein levels not significantly altered in patient fibroblasts, the authors provide evidence for impaired enzymatic function eg. presence of the SHMT2 substrate (THF) in patient but not control (mitochondria-enriched) fibroblasts , decrease in glycine/serine ratios, impared folate metabolism. Patient fibroblasts displayed impaired oxidative capacity (reduced ATP levels in a medium without glucose, diminished oxygen consumption rates). Mitochondrial membrane potential and ROS levels were also suggestive of redox malfunction.

Shmt2 ko in mice was previously shown to be embryonically lethal attributed to severe mitochondrial respiration defects, although there was no observed brain metabolic defect.

The authors performed Shmt2 knockdown in motoneurons in Drosophila, demonstrating neuromuscular junction (# of satellite boutons) and motility defects (climbing distance/velocity).
Sources: Literature
Mendeliome v0.4860 VPS16 Zornitza Stark gene: VPS16 was added
gene: VPS16 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: VPS16 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: VPS16 were set to 32808683
Phenotypes for gene: VPS16 were set to Dystonia
Added comment: 18 individuals reported with high-impact variants in VPS16 and a progressive early onset dystonia (median age 12 years, range 3–50 years), with prominent oromandibular, bulbar, cervical, and upper limb involvement. Progressive generalization ensued, although most remained ambulant, and only a minority (16%) lost the ability to walk in adulthood. Additional clinical features of mild to moderate intellectual disability and neuropsychiatric symptoms were present in approximately one‐third. In 4 individuals, magnetic resonance imaging (MRI) showed bilateral and symmetrical hypointensity of the globi pallidi and sometimes also the midbrain and dentate nuclei, suggestive of iron deposition. Mild generalized cerebral atrophy was also apparent in 4 individuals.
Sources: Literature
Mendeliome v0.4844 ARX Zornitza Stark Mode of inheritance for gene: ARX was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4843 ARX Elena Savva reviewed gene: ARX: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 14722918, 19738637, 32519823, 28150386, 21496008; Phenotypes: Epileptic encephalopathy, early infantile, 1 MIM#308350, Hydranencephaly with abnormal genitalia MIM#300215, Lissencephaly, X-linked 2 MIM#300215, Mental retardation, X-linked 29 and others MIM#300419, Partington syndrome MIM#309510, Proud syndrome MIM#300004; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.4808 ALG14 Zornitza Stark Phenotypes for gene: ALG14 were changed from Myasthenic syndrome, congenital, 15, without tubular aggregates 616227; Intellectual developmental disorder with epilepsy, behavioral abnormalities, and coarse facies (IDDEBF), MIM#619031; Disorder of N-glycosylation to Myasthenic syndrome, congenital, 15, without tubular aggregates 616227; Intellectual developmental disorder with epilepsy, behavioral abnormalities, and coarse facies (IDDEBF), MIM#619031; Myopathy, epilepsy, and progressive cerebral atrophy, MIM# 619036; Disorder of N-glycosylation
Mendeliome v0.4807 ALG14 Zornitza Stark changed review comment from: 5 individuals from unrelated families described in the literature: one with myasthenic syndrome, no report of ID; second with predominantly ID phenotype; and three more with a neurodegenerative phenotype. ALG14 is part of the UDP-GlcNAc transferase, which catalyzes a key step in endoplasmic reticulum N-linked glycosylation; to: 5 individuals from unrelated families described in the literature: one with myasthenic syndrome, no report of ID; second with predominantly ID phenotype; and three more with a neurodegenerative phenotype. ALG14 is part of the UDP-GlcNAc transferase, which catalyzes a key step in endoplasmic reticulum N-linked glycosylation. The three OMIM disorders may represent a spectrum of severity for CDG.
Mendeliome v0.4807 ALG14 Zornitza Stark edited their review of gene: ALG14: Changed phenotypes: Myasthenic syndrome, congenital, 15, without tubular aggregates 616227, Intellectual developmental disorder with epilepsy, behavioral abnormalities, and coarse facies (IDDEBF), MIM#619031, Myopathy, epilepsy, and progressive cerebral atrophy, MIM# 619036, Disorder of N-glycosylation
Mendeliome v0.4784 RNPC3 Zornitza Stark gene: RNPC3 was added
gene: RNPC3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RNPC3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RNPC3 were set to 29866761; 32462814
Phenotypes for gene: RNPC3 were set to Growth hormone deficiency
Review for gene: RNPC3 was set to AMBER
Added comment: Two families reported. PMID 29866761: isolated growth deficiency and pituitary hypoplasia. PMID 32462814: growth hormone deficiency, central congenital hypothyroidism, congenital cataract, developmental delay/intellectual deficiency and delayed puberty. Full spectrum of phenotype unclear at present.
Sources: Literature
Mendeliome v0.4783 PRICKLE3 Teresa Zhao gene: PRICKLE3 was added
gene: PRICKLE3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PRICKLE3 was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Publications for gene: PRICKLE3 were set to 32516135
Phenotypes for gene: PRICKLE3 were set to Leber’s hereditary optic neuropathy MIM#535000
Review for gene: PRICKLE3 was set to AMBER
Added comment: Reported as X-linked LHON modifier (c.157C>T, p.Arg53Trp) in PRICKLE3 in 3 Chinese families. All affected individuals carried both ND4 11778G>A and p.Arg53Trp mutations, while subjects bearing only a single mutation exhibited normal vision.

Defective assembly, stability, and function of ATP synthase observed using Lymphoblastoid cell lines from one of the families.

This finding indicated that the p.Arg53Trp mutation acted in synergy with the m.11778G>A mutation and deteriorated mitochondrial dysfunctions necessary for the expression of LHON.

Prickle3-deficient mice exhibited pronounced ATPase deficiencies.
Sources: Literature
Mendeliome v0.4783 GBF1 Paul De Fazio changed review comment from: Four unrelated families with individuals affected by sporadic or dominant Distal hereditary motor neuropathies (HMNs) or axonal Charcot-Marie-Tooth neuropathy (CMT2). 3 missense variants (1 de novo) and 1 nonsense variant (de novo). Authors observed marked increase in Golgi fragmentation in primary fibroblasts derived from all affected individuals.
Sources: Literature; to: Four unrelated families with individuals affected by sporadic or dominant Distal hereditary motor neuropathies (HMNs) or axonal Charcot-Marie-Tooth neuropathy (CMT2). 3 missense variants (1 de novo) and 1 nonsense variant (de novo).

Age of onset varied from childhood (nonsense variant) to 50s. Authors observed marked increase in Golgi fragmentation in primary fibroblasts derived from all affected individuals.
Sources: Literature
Mendeliome v0.4781 MBTPS1 Zornitza Stark gene: MBTPS1 was added
gene: MBTPS1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MBTPS1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MBTPS1 were set to 32857899; 32420688; 30046013
Phenotypes for gene: MBTPS1 were set to Skeletal dysplasia
Review for gene: MBTPS1 was set to GREEN
Added comment: Three unrelated individuals reported with bi-allelic variants in this gene and a skeletal dysplasia, one described with SRS-like features. Elevated blood lysosomal enzymes are also a feature.
Sources: Literature
Mendeliome v0.4780 GBF1 Paul De Fazio gene: GBF1 was added
gene: GBF1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GBF1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: GBF1 were set to 32937143
Phenotypes for gene: GBF1 were set to Axonal Neuropathy
Review for gene: GBF1 was set to GREEN
gene: GBF1 was marked as current diagnostic
Added comment: Four unrelated families with individuals affected by sporadic or dominant Distal hereditary motor neuropathies (HMNs) or axonal Charcot-Marie-Tooth neuropathy (CMT2). 3 missense variants (1 de novo) and 1 nonsense variant (de novo). Authors observed marked increase in Golgi fragmentation in primary fibroblasts derived from all affected individuals.
Sources: Literature
Mendeliome v0.4770 NEMF Zornitza Stark changed review comment from: Nine individuals from 7 unrelated families reported with a mixed CNS/PNS phenotype. 7/9 had ID, 4/9 had formal assessments demonstrating axonal neuropathy, 3/9 had ataxia; muscular atrophy, hypotonia, respiratory distress, scoliosis also described in some. Three independently generated mouse models had progressive motor neuron degeneration.
Sources: Literature; to: Nine individuals from 7 unrelated families reported with a mixed CNS/PNS phenotype. 7/9 had ID, 4/9 had formal assessments demonstrating axonal neuropathy, 3/9 had ataxia; muscular atrophy, hypotonia, respiratory distress, scoliosis also described in some. Three independently generated mouse models had progressive motor neuron degeneration.

Single individual with de novo variant reported, postulated dominant negative effect. Evidence for mono allelic variants causing disease is limited.
Sources: Literature
Mendeliome v0.4751 NUP188 Zornitza Stark Phenotypes for gene: NUP188 were changed from microcephaly; ID; cataract; structural brain abnormalities; hypoventilation to Sandestig-Stefanova syndrome, 618804; microcephaly; ID; cataract; structural brain abnormalities; hypoventilation
Mendeliome v0.4750 NUP188 Zornitza Stark edited their review of gene: NUP188: Changed phenotypes: Sandestig-Stefanova syndrome, 618804, microcephaly, ID, cataract, structural brain abnormalities, hypoventilation
Mendeliome v0.4749 SETD1A Zornitza Stark gene: SETD1A was added
gene: SETD1A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SETD1A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SETD1A were set to 31197650; 32346159
Phenotypes for gene: SETD1A were set to Epilepsy, early-onset, with or without developmental delay, MIM# 618832
Review for gene: SETD1A was set to GREEN
Added comment: 19 unrelated individuals reported with de novo variants in this gene and a neurodevelopmental phenotype, primarily manifesting and ID and seizures. LOF mechanism supported by functional data. Three mouse models. SNPs in this gene have also been associated with risk of developing schizophrenia.
Sources: Literature
Mendeliome v0.4747 HPDL Zornitza Stark commented on gene: HPDL: 17 individuals from 13 families, with a spectrum of neurologic impairment ranging from a severe congenital form without any neurological development (n = 2/17, 12%) to infantile-onset presentations (n = 10/17, 59%) with moderate to severe neurodevelopmental issues, partly with a pathology reminiscent of mitochondrial disease (Leigh-like syndrome), to juvenile-onset spastic paraplegia (n = 5/17, 29%).

Frequently observed clinical findings included chronic progression of neurological signs (n = 16/17, 94%), motor developmental delay (n = 12/17, 71%), intellectual impairment (n = 11/17, 65%), microcephaly (n = 9/16, 56%), and seizures/epilepsy (n = 9/17, 53%). Other relevant clinical findings were visual disturbances/strabismus (n = 9/17, 53%) and loss of developmental milestones (n = 6/17, 35%).

Acute central respiratory failure leading to life-threatening events requiring partly mechanically assisted ventilation occurred in half of individuals with infantile presentation (n = 5/10, 50%), respectively one third of all individuals (n = 5/17, 29%).

Demyelinating neuropathy was present in three individuals (n = 3/11, 27%), with reduced sensory nerve conduction velocity (NCV) in all and severely reduced motor NCV in one.
Mendeliome v0.4743 SCN1A Zornitza Stark edited their review of gene: SCN1A: Added comment: Note we have reported the association with AMC previously in PMID 29543227 (Supplementary info) in an infant presenting with AMC and severe EE, and de novo p.(Ile1347Asn) variant which at the time was thought to only partially explain the phenotype, but in light of this new report, likely fully explains the phenotype. Given the presence of severe seizure disorder in the two infants who were phenotyped in the newborn period, this likely represents the severe end of the spectrum of SCN1A-related disorders rather than a distinct association.; Changed phenotypes: Epileptic encephalopathy, early infantile, 6 (Dravet syndrome), MIM# 607208, Genetic Epilepsy Febrile Seizures plus (GEFS+) Syndrome, Febrile seizures, Arthrogryposis multiplex congenita
Mendeliome v0.4743 PRKD1 Zornitza Stark changed review comment from: PMID: 32817298 (2020) - Two additional unrelated cases with de novo variants, c.1774G>C and c.1808G>A, and telangiectasia, ectodermal dysplasia, brachydactyly and congenital heart disease. Functional analysis using in vitro kinase assays with recombinant proteins showed that the c.1808G>A, p.(Arg603His) variant represents a gain-of-function mutation encoding an enzyme with a constitutive, lipid-independent catalytic activity. The c.1774G>C, p.(Gly592Arg) variant in contrast shows a defect in substrate phosphorylation representing a loss-of-function mutation.

c.1774G>C, p.(Gly592Arg) is recurrent, reported in 3/5 individuals.; to: PMID: 27479907 (2016): three individuals reported, two with the c.1774G>A variant and one with the c.896T>G variant. All had congenital heart disease, two had some developmental delay, and two had variable features of ectodermal dysplasia, including sparse hair, dry skin, thin skin, fragile nails, premature loss of primary teeth, and small widely spaced teeth; the third individuals had a 'disorganized eyebrow.'

PMID: 32817298 (2020) - Two additional unrelated cases with de novo variants, c.1774G>C and c.1808G>A, and telangiectasia, ectodermal dysplasia, brachydactyly and congenital heart disease. Functional analysis using in vitro kinase assays with recombinant proteins showed that the c.1808G>A, p.(Arg603His) variant represents a gain-of-function mutation encoding an enzyme with a constitutive, lipid-independent catalytic activity. The c.1774G>C, p.(Gly592Arg) variant in contrast shows a defect in substrate phosphorylation representing a loss-of-function mutation.

c.1774G>C, p.(Gly592Arg) is recurrent, reported in 3/5 individuals.
Mendeliome v0.4724 IGSF10 Bryony Thompson gene: IGSF10 was added
gene: IGSF10 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IGSF10 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: IGSF10 were set to 27137492; 31042289
Phenotypes for gene: IGSF10 were set to delayed puberty; hypogonadotropic hypogonadism; primary ovary insufficiency
Review for gene: IGSF10 was set to AMBER
Added comment: PMID: 27137492 - 4 Finnish families segregating p.Glu161Lys, but Finnish MAF in ExAC is 2%. Another six additional families with a possible missense, but variants are seen in ExAC suggesting incomplete penetrance. Supporting in vitro functional assays and zebrafish model. PMID: 31042289 - 2 unrelated consanguineous families with homozygous variants and family with a heterozygous frameshift and apparent incomplete penetrance.
Sources: Literature
Mendeliome v0.4722 PFN1 Zornitza Stark Phenotypes for gene: PFN1 were changed from to Amyotrophic lateral sclerosis 18 (MIM# 614808); Paget’s disease of bone
Mendeliome v0.4720 PFN1 Zornitza Stark reviewed gene: PFN1: Rating: GREEN; Mode of pathogenicity: None; Publications: 31802421, 31611772, 31401564, 30203378, 28040732, 22801503; Phenotypes: Amyotrophic lateral sclerosis 18, MIM# 614808; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4714 PFN1 Ain Roesley reviewed gene: PFN1: Rating: GREEN; Mode of pathogenicity: None; Publications: 23141414, 22801503, 25499087, 24309268, 22801503, 26908597; Phenotypes: Amyotrophic lateral sclerosis 18 (MIM# 614808); Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4700 SMPX Zornitza Stark Mode of inheritance for gene: SMPX was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4699 SMPX Zornitza Stark reviewed gene: SMPX: Rating: GREEN; Mode of pathogenicity: None; Publications: 21549342, 21549336, 21893181, 22911656, 28542515; Phenotypes: Deafness, X-linked 4, MIM# 300066; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4693 MYH9 Zornitza Stark Phenotypes for gene: MYH9 were changed from to Deafness, autosomal dominant 17, MIM# 603622; Macrothrombocytopenia and granulocyte inclusions with or without nephritis or sensorineural hearing loss, MIM# 155100; MYH9-related disorders
Mendeliome v0.4690 MYH9 Zornitza Stark reviewed gene: MYH9: Rating: GREEN; Mode of pathogenicity: None; Publications: 9390828, 24890873, 17146397, 25505834, 16630581, 16162639, 23976996, 21908426; Phenotypes: Deafness, autosomal dominant 17, MIM# 603622, Macrothrombocytopenia and granulocyte inclusions with or without nephritis or sensorineural hearing loss, MIM# 155100, MYH9-related disorders; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4685 RPL9 Arina Puzriakova changed review comment from: PMID: 31799629 (2020) - One individual diagnosed with Diamond Blackfan anaemia carrying a de novo variant (c.-2+1G>C) in the 5′UTR of RPL9, predicted to affect the donor splice site of exon 1. Functional studies showed the variant impairs processing of pre-rRNA during ribosome biogenesis, stabilises TP53 and impairs the proliferation and differentiation of erythroid cells. Zebrafish models of RPL9 LoF recapitulate the anaemia phenotype.; to: PMID: 31799629 (2020) - Female infant diagnosed with Diamond-Blackfan anaemia carrying a de novo variant (c.-2+1G>C) in the 5′UTR of RPL9, predicted to affect the donor splice site of exon 1. Phenotypic overlap can be seen with the previously reported case with the same variant, including colitis, thumb anomaly, and microcephaly. Functional studies showed the variant impairs processing of pre-rRNA during ribosome biogenesis, stabilises TP53 and impairs the proliferation and differentiation of erythroid cells. Zebrafish models of RPL9 LoF recapitulate the anaemia phenotype.
Mendeliome v0.4672 ALG13 Zornitza Stark Phenotypes for gene: ALG13 were changed from to Congenital disorder of glycosylation, type Is (MIM# 300884)
Mendeliome v0.4670 ALG13 Zornitza Stark Mode of inheritance for gene: ALG13 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4669 ALG13 Zornitza Stark reviewed gene: ALG13: Rating: GREEN; Mode of pathogenicity: None; Publications: 23033978, 23934111, 24781210, 24896178, 25732998, 26138355, 26482601, 28940310, 32238909; Phenotypes: Congenital disorder of glycosylation, type Is (MIM# 300884); Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4668 BLOC1S5 Zornitza Stark gene: BLOC1S5 was added
gene: BLOC1S5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: BLOC1S5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: BLOC1S5 were set to 32565547
Phenotypes for gene: BLOC1S5 were set to Hermansky–Pudlak syndrome
Review for gene: BLOC1S5 was set to GREEN
Added comment: 2 unrelated patients with mild oculocutaneous albinism, moderate bleeding diathesis, platelet aggregation deficit, and a dramatically decreased number of platelet dense granules, all signs compatible with HPS. Identified distinct homozygous variants in the BLOC1S5 gene (patient 1: deletion of exons 3 and 4, patient 2: 1-bp deletion in exon 4). Parental segregation confirmatory in patient 1, quantitative PCR analysis confirmatory in patient 2). Functional tests performed on platelets of one patient displayed an absence of the obligate multisubunit complex BLOC-1, showing that the variant disrupts BLOC1S5 function and impairs BLOC-1 assembly. Expression of the patient-derived BLOC1S5 deletion in nonpigmented murine Bloc1s5-/- melan-mu melanocytes failed to rescue pigmentation, the assembly of a functional BLOC-1 complex, and melanosome cargo trafficking, unlike the wild-type allele. Pathogenic variants in the genes encoding three other BLOC-1 subunits (DTNBP1, BLOC1S3, and BLOC1S6) underlie HPS types 7, 8, and 9 respectively.
Sources: Literature
Mendeliome v0.4647 COCH Zornitza Stark changed review comment from: Mono-allelic variants: Over 50 affected individuals from more than 10 families reported, mouse model. Dominant negative effect postulated.

Bi-allelic variants: three families reported with bi-allelic variants in this gene and deafness. All variants are LOF, some functional data. PMIDs 29449721, 32939038, 32562050.; to: Mono-allelic variants: Over 50 affected individuals from more than 10 families reported, mouse model. Dominant negative effect postulated.

Bi-allelic variants: three families reported with bi-allelic variants in this gene and deafness. All variants are LOF, some functional data. PMIDs 29449721, 32939038, 32562050.
Mendeliome v0.4647 COCH Zornitza Stark changed review comment from: Over 50 affected individuals from more than 10 families reported, mouse model. Single family with two siblings reported with bi-allelic variants in this gene and deafness (homozygous LOF) in PMID 29449721, evidence for bi-allelic disease is limited.; to: Mono-allelic variants: Over 50 affected individuals from more than 10 families reported, mouse model. Dominant negative effect postulated.

Bi-allelic variants: three families reported with bi-allelic variants in this gene and deafness. All variants are LOF, some functional data. PMIDs 29449721, 32939038, 32562050.
Mendeliome v0.4639 EYA4 Zornitza Stark Phenotypes for gene: EYA4 were changed from to Deafness, autosomal dominant 10, MIM# 601316; Cardiomyopathy, dilated, 1J, MIM# 605362
Mendeliome v0.4636 EYA4 Zornitza Stark reviewed gene: EYA4: Rating: GREEN; Mode of pathogenicity: None; Publications: 11159937, ​17568404, 25681523, 25963406, 25242383, 26331839, 18219393, 27545760, 15735644, 10769282, 30155266; Phenotypes: Deafness, autosomal dominant 10, MIM# 601316, Cardiomyopathy, dilated, 1J, MIM# 605362; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4625 MIEF2 Zornitza Stark Phenotypes for gene: MIEF2 were changed from Progressive muscle weakness; Exercise intolerance; Ragged red and COX negative fibres; Complex I and IV deficiency to Combined oxidative phosphorylation deficiency 49, MIM# 619024; Progressive muscle weakness; Exercise intolerance; Ragged red and COX negative fibres; Complex I and IV deficiency
Mendeliome v0.4624 MRPS25 Zornitza Stark Phenotypes for gene: MRPS25 were changed from Dyskinetic cerebral palsy; Mitochondrial myopathy; Partial agenesis of the corpus callosum to Combined oxidative phosphorylation deficiency 50, MIM# 619025; Dyskinetic cerebral palsy; Mitochondrial myopathy; Partial agenesis of the corpus callosum
Mendeliome v0.4623 MRPS25 Zornitza Stark edited their review of gene: MRPS25: Changed phenotypes: Combined oxidative phosphorylation deficiency 50, MIM# 619025, Dyskinetic cerebral palsy, Mitochondrial myopathy, Partial agenesis of the corpus callosum
Mendeliome v0.4623 MIEF2 Zornitza Stark edited their review of gene: MIEF2: Changed phenotypes: Combined oxidative phosphorylation deficiency 49, MIM# 619024, Progressive muscle weakness, Exercise intolerance, Ragged red and COX negative fibres, Complex I and IV deficiency
Mendeliome v0.4622 COL4A5 Zornitza Stark Mode of inheritance for gene: COL4A5 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4621 COL4A5 Zornitza Stark reviewed gene: COL4A5: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Alport syndrome 1, X-linked, MIM# 301050; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4568 RPS20 Bryony Thompson gene: RPS20 was added
gene: RPS20 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RPS20 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RPS20 were set to 32790018
Phenotypes for gene: RPS20 were set to Diamond Blackfan anaemia
Mode of pathogenicity for gene: RPS20 was set to Other
Review for gene: RPS20 was set to AMBER
Added comment: Two unrelated cases where a de novo variant involving Ile84 (Ile84Ser and Ile84Asn), and reduce the RPS20 protein level in patient cells. Yeast models with mutation of the cognate residue resulted in defects in growth, ribosome biogenesis, and polysome formation. Loss of function may not be the mechanism of disease, because loss of function variants appear to be exclusively associated with familial colorectal cancer without the DBA phenotype.
Sources: Literature
Mendeliome v0.4557 MECP2 Arina Puzriakova reviewed gene: MECP2: Rating: GREEN; Mode of pathogenicity: None; Publications: 32469049; Phenotypes: Rett syndrome, 312750; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.4548 KIAA1161 Zornitza Stark edited their review of gene: KIAA1161: Added comment: In a cohort study comprising 435 individuals with primary brain calcification, 38 individuals identified with mono-allelic variants in this gene, in addition to 14 with bi-allelic variants. Clinical and imaging penetrance of individuals with bi-allelic variants were 100%, whereas among individuals with heterozygous variants, penetrance of imaging phenotype was reduced to 73.7% (28 of 38) and clinical penetrance was much lower. Most (34 of 38) remained asymptomatic whereas 4 had symptoms of uncertain clinical significance (nonspecific depression, epilepsy and late-onset parkinsonism). Compared with individuals with biallelic MYORG variants, individuals with heterozygous variants had brain calcifications with much lower calcification scores (P < 2e-16). HGNC approved name is MYORG.; Changed publications: 30656188, 30649222, 30460687, 29910000, 31951047; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.4548 ALG14 Zornitza Stark Phenotypes for gene: ALG14 were changed from to Myasthenic syndrome, congenital, 15, without tubular aggregates 616227; Intellectual developmental disorder with epilepsy, behavioral abnormalities, and coarse facies (IDDEBF), MIM#619031; Disorder of N-glycosylation
Mendeliome v0.4545 ALG14 Zornitza Stark reviewed gene: ALG14: Rating: GREEN; Mode of pathogenicity: None; Publications: 30221345, 23404334, 28733338; Phenotypes: Myasthenic syndrome, congenital, 15, without tubular aggregates 616227, Intellectual developmental disorder with epilepsy, behavioral abnormalities, and coarse facies (IDDEBF), MIM#619031, Disorder of N-glycosylation; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.4528 NSUN3 Zornitza Stark Phenotypes for gene: NSUN3 were changed from combined mitochondrial respiratory chain complex deficiency to Combined oxidative phosphorylation deficiency 48, MIM# 619012
Mendeliome v0.4526 NSUN3 Zornitza Stark edited their review of gene: NSUN3: Added comment: Second family reported with early-onset mitochondrial encephalomyopathy and seizures.; Changed publications: 27356879, 32488845; Changed phenotypes: Combined oxidative phosphorylation deficiency 48, MIM# 619012
Mendeliome v0.4525 LIFR Zornitza Stark edited their review of gene: LIFR: Added comment: Bi-allelic variants: At least 28 unique variants (nonsense, frameshift, splicing, missense, gross deletions) have been reported in individuals with Stuve-Wiedemann syndrome/Schwartz-Jampel type 2 syndrome, 22 of which are predicted to cause LOF, suggesting homozygous LOF is the mechanism of disease for this gene. Variants in this gene have been reported in at least 22 probands in four publications.

Mono-allelic variants: associated with CAKUT in 4 individuals, mouse model recapitulates phenotype.; Changed rating: GREEN; Changed publications: 14740318, 20447141, 24988918, 29620724, 28334964; Changed phenotypes: Stuve-Wiedemann syndrome/Schwartz-Jampel type 2 syndrome, MIM# 601559, CAKUT; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.4520 SLC12A2 Zornitza Stark edited their review of gene: SLC12A2: Added comment: Monoallelic :
DD/ID was a feature in >= 6 individuals with monoallelic de novo SLC12A2. An individual with an exon 22 truncating variant was reported to have normal milestones and cognitive function. Exon 21 variants have been described in individuals with rather isolated hearing impairment (possibly some associated motor delay, but normal cognition). Hearing impairment was also reported in 2/6 patients with variants in other exons (1 missense / 1 frameshift).

Biallelic :
DD/ID was reported in at least 3 individuals in literature. Hearing impairment has been reported on 2 occasions (although this was not probably evaluated in all subjects).

---

Monoallelic SLC12A2 mutations :

► Individuals with de novo mutations and developmental disorder were first identified by the DDD study (2017 - PMID: 28135719). 5 of them have been reported in detail by McNeill et al (below).

► McNeill et al (2020 - PMID: 32658972) report on 6 individuals with neurodevelopmental disorder due to de novo SLC12A2 mutation. All presented DD or ID ranging from mild to severe. ASD was reported in 3/6. Sensorineural hearing loss was a feature in 2/6 with the remaining having normal formal evaluations. Brain, cardiac and/or additional malformations were reported in a single individual. Following non-diagnostic prior work-up (CMA, FMR1 or other investigations) trio exome sequencing revealed missense (4/6) or truncating variants (2/6).

Three additional individuals (incl. a father and his son) with missense variants in exon 21 (NM_001046.3 / p.Glu979Lys and p.Glu980Lys) presented with bilateral sensorineural hearing loss. Speech and/or motor delay reported in these cases were attributed to the hearing impairment/vestibular arreflexia (cognitive abilities not tested).

SLC12A2 encodes sodium-potassium-chloride transporter 1 (also NKCC1).

The GTEx project has identified 8 isoforms. In brain both exon 21-containing/deleted isoforms are expressed (cited Morita et al 2014 - PMID: 24695712). As the authors discuss, RNA-seq of the developing mouse cochlea suggests that the exon 21 containing isoform is the single transcript expressed. Evidence from RNA-seq data (BrainSpan project) and literature suggests that the significant amounts of exon 21 lacking isoforms in fetal brain compensate for the deleterious effects of exon 21 variants and explain the lack of NDD in relevant patients.

Slc12a2 (NKCC1) null mouse model has demonstrated that the transporter plays a role in accumulation of the potassium rich endolymph in the inner ear, with NKCC1 absence causing sensorineural deafness and imbalance. Slc12a2 display cochlear malformations, loss of hair cells and hearing impairment (cited Delpire et al 1999 - PMID: 10369265). The brain phenotype has not been studied extensively, although loss of Slc12a2 has been shown to inhibit neurogenesis (cited: Magalhães and Rivera et al. - PMID: 27582690).

Slc12a2 null zebrafish display a collapse of the otic vesicle and reduced endolymph (Abbas and Whitfield, 2009 - PMID: 19633174) relevant to the human hearing disorder.

In vitro assessment of NKCC1 ion transporter function in Xenopus laevis, supported the deleterious effect of the identified variants (significant reduction in K+ influx). Using available single cell RNA-seq data the authors further demonstrated that SLC12A2 expressing cells display transcriptomic profiles reflective of active neurogenesis.

► Delpire et al (2016 - PMID: 27900370 - not reviewed in detail) described a 13 y.o. girl harboring a de novo 11-bp deletion in SLC12A2 exon 22. This individual reached developmental milestones on time and had a NORMAL cognitive function. Hearing was seemingly normal. Features included orthostatic intolerance, respiratory weakness, multiple endocrine abnormalities, pancreatic insufficiency and multiorgan failure incl. gut and bladder. Exome in the proband, parents and 3 unaffected sibs suggested SLC12A2 as the only candidate for her phenotype. Functional analyses in Xenopus laevis oocytes suggested that a non functional transporter was expressed and trafficked to the membrane as the wt. Detection of the truncated protein at higher molecular sizes suggested either enhanced dimerization or misfolded aggregate. There was no dominant-negative effect of mutant NKCC1. In patient fibroblasts a reduced total and NKCC1-mediated K+ influx.

► Mutai et al (2020 - PMID: 32294086) report on several individuals from 4 families, harboring variants within exon 21 or - in one case - at it's 3' splice-site (leading to skipping oe this exon at the mRNA level). All subjects were investigated for severe/profound hearing loss (in line with the role of exon 21-included isoforms in cochlea. The variant segregated with hearing impairment in 3 generations of a family while in all other subjects the variant had occured as de novo event. Despite motor delays (e.g. the subject from fam2 could not hold head or sit at the age of 10m / the proband in Fam3 was able to hold his head and walk at 6 and 20 m respectively) behavior and cognition were commented to be within normal range.


-----

Biallelic SLC12A2 mutations:

► Anazi et al (2017 - PMID: 29288388) briefly reported on a 3 y.o. boy (17DG0776) with central hypotonia, neonatal respiratory distress, failure to thrive, global DD and microcephaly and a skeletal survey suggestive of osteopenia. After non-diagnostic prior investigations (CMA revealing a 1p duplication classified as VUS, extensive metabolic workup), WES revealed a homozygous SLC12A2 splicing variant [NM_001046.2:c.2617-2A>G].

► Macnamara et al (2019 - PMID: 30740830) described a 5.5 y.o. male with sensorineural hearing loss, profound delays in all developmental areas among several other features (choanal atresia, failure to thrive, respiratory problems, absent sweat and tear production or salivation, GI abnormalities). Genetic testing for several disorders considered (cystic fibrosis, spinal muscular atrophy, sequencing and del/dup analysis of mtDNA) was normal. CMA revealed paternal uniparental isodisomy for chr. 5 and WGS a homozygous 22kb deletion in SLC12A2. This was followed by confirmation of homozygosity in the proband, heterozygosity of the unaffected father, delineation of breakpoints (chr5:127441491-127471419). mRNA studies in patient fibroblasts confirmed deletion of ex2-7, splicing of ex1 directly to ex8 and introduction of a premature stop codon in ex9. qRT-PCR confirmed that mRNA is likely subjected to NMD (expression ~80% of control). Western blot confirmed absence of the protein in the patient's fibroblasts. Again mouse models are thought to recapitulate the hearing defect but also the deficient saliva production (cited Evans et al 2000 - PMID: 10831596). Again the authors speculate a role of SLC12A2 in brain development based on evidence from murine models (migration, dendritic growth, increse in neuron density through regulation of GABAergic signalling (Young et al 2012 - PMID: 23015452). Hypotheses are also made on a regulatory relationship between NKCC1 and CFTR based on mRNA data from the ko mouse model.

► Stödberg et al (2020 - PMID: 32754646) reported 2 sibs with a complex neurodevelopmental disorder due to compound heterozygosity for a frameshift SLC12A2 variant and a splicing one (NM_001046:c.1431delT and c.2006-1G>A). Both presented hypotonia, neonatal S. aureus parotitis and respiratory problems (incl. apneas). While the older sib died at the age of 22 days, the younger one had persistent respiratory issues incl. a dry respiratory mucosa motivating metabolic, immunology investigations and testing for CF. She displayed microcephaly (OFC -2.5 SD, H was also -3.5SD), severe intellectual disability. MRI was suggestive of white matter and basal ganglia abnormalities. Other features incl. hearing impairment, and lack of tears,saliva and sweat, constipation and intestinal malrotation. There was facial dysmorphism. The variants were the only retained following WGS of the 2 affected sisters, parents and an unaffected brother. The splicing variant was shown to result in skipping of exon 13, while the indel in NMD. Again the authors discuss that the deficient saliva production, impaired hearing and GI problems are recapitulated in the mouse model (several refs provided).; Changed rating: GREEN; Changed publications: 28135719, 32658972, 27900370, 32294086, 29288388, 30740830, 32754646; Changed phenotypes: Kilquist syndrome, deafness, intellectual disability, dysmorphic features, absent salivation, ectodermal dysplasia, constipation, intestinal malrotation, multiple congenital anomalies; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.4503 ZMYM2 Zornitza Stark gene: ZMYM2 was added
gene: ZMYM2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZMYM2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ZMYM2 were set to 32891193
Phenotypes for gene: ZMYM2 were set to Congenital anomalies of kidney and urinary tract; Neurodevelopmental disorder
Review for gene: ZMYM2 was set to GREEN
Added comment: Heterozygous pathogenic (pLoF) ZMYM2 variants have been reported in individuals with syndromic presentation including CAKUT (in several cases) and variable neurological manifestations among extra-renal features.

--

Connaughton et al (2020 - PMID: 32891193) report on 19 individuals (from 15 unrelated families) with heterozygous pathogenic ZMYM2 variants.

Affected individuals from 7 families presented with CAKUT while all of them displayed extra-renal features. Neurological manifestations were reported in 16 individuals from 14 families (data not available for 1 fam), among others hypotonia (3/14 fam), speech delay (4/14 fam), global DD (9/14 fam), ID (4/14 fam), microcephaly (4/14 fam). ASD was reported in 4 fam (4 indiv). Seizures were reported in 2 fam (2 indiv). Variable other features included cardiac defects, facial dysmorphisms, small hands and feet with dys-/hypo-plastic nails and clinodactyly.

14 pLoF variants were identified, in most cases as de novo events (8 fam). In 2 families the variant was inherited from an affected parent. Germline mosaicism occurred in 1 family.

The human disease features were recapitulated in a X. tropicalis morpholino knockdown, with expression of truncating variants failing to rescue renal and craniofacial defects. Heterozygous Zmym2-deficient mice also recapitulated the features of CAKUT.

ZMYM2 (previously ZNF198) encodes a nuclear zinc finger protein localizing to the nucleus (and PML nuclear body).

It has previously been identified as transcriptional corepressor interacting with nuclear receptors and the LSD1-CoREST-HDAC1 complex. It has also been shown to interact with FOXP transcription factors.

The authors provide evidence for loss of interaction of the truncated ZMYM2 with FOXP1 (mutations in the latter having recently been reported in syndromic CAKUT).
Sources: Literature
Mendeliome v0.4501 MTX2 Zornitza Stark gene: MTX2 was added
gene: MTX2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MTX2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MTX2 were set to 32917887
Phenotypes for gene: MTX2 were set to Mandibuloacral dysplasia; lipodystrophy; arterial calcification
Review for gene: MTX2 was set to GREEN
Added comment: Seven individuals from 5 unrelated families reported with severe progeroid form of MAD with growth retardation, small viscerocranium with mandibular underdevelopment, distal acro-osteolyses, lipodystrophy, altered skin pigmentation, renal focal glomerulosclerosis, and extremely severe hypertension in most cases, eventually associated with disseminated arterial calcification. Loss of MTX2 in patients' primary fibroblasts led to loss of Metaxin-1 (MTX1) and mitochondrial dysfunction, including network fragmentation and oxidative phosphorylation impairment. Furthermore, patients' fibroblasts were resistant to induced apoptosis, leading to increased cell senescence and mitophagy and reduced proliferation.
Sources: Literature
Mendeliome v0.4500 RREB1 Zornitza Stark gene: RREB1 was added
gene: RREB1 was added to Mendeliome. Sources: Literature
SV/CNV tags were added to gene: RREB1.
Mode of inheritance for gene: RREB1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RREB1 were set to 32938917
Phenotypes for gene: RREB1 were set to Noonan syndrome-like disorder
Review for gene: RREB1 was set to RED
Added comment: Single individual reported with Noonan syndrome-like features and a deletion encompassing RREB1. Overlapping deletions in publicly reported databases examined, and RREB1 postulated to be the key gene. Rreb1 hemizygous mice display orbital hypertelorism and age dependent cardiac hypertrophy. RREB1 recruits SIN3A and KDM1A to an RRE in target promoters in human and murine cells to control histone H3K4 methylation of MAPK pathway genes.

In summary, single well phenotyped individual with a CNV and experimental data to support gene-disease association.
Sources: Literature
Mendeliome v0.4497 NEMF Zornitza Stark gene: NEMF was added
gene: NEMF was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NEMF was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NEMF were set to 32934225
Phenotypes for gene: NEMF were set to Intellectual disability; neuropathy
Review for gene: NEMF was set to GREEN
Added comment: Nine individuals from 7 unrelated families reported with a mixed CNS/PNS phenotype. 7/9 had ID, 4/9 had formal assessments demonstrating axonal neuropathy, 3/9 had ataxia; muscular atrophy, hypotonia, respiratory distress, scoliosis also described in some. Three independently generated mouse models had progressive motor neuron degeneration.
Sources: Literature
Mendeliome v0.4496 FNIP1 Arina Puzriakova gene: FNIP1 was added
gene: FNIP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FNIP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FNIP1 were set to 32181500; 32905580
Phenotypes for gene: FNIP1 were set to Hypertrophic Cardiomyopathy; Primary Immunodeficiency; Agammaglobulinemia; Neutropenia
Review for gene: FNIP1 was set to GREEN
Added comment: - PMID: 32181500 (2020) - Three patients from two independent consanguineous families with homozygous variants (c.3353G>A, p.Ser1118Asn and c.1289delA, p.His430Profs7*) in the FNIP1 gene. Both variants segregated with the disease phenotype in each family. Clinically, patients presented with combined immunodeficiency, cardiac findings (hypertrophic cardiomyopathy, Wolff‐Parkinson‐White syndrome), and myopathy of skeletal muscles with motor DD. Authors note phenotypic overlap with the murine model of FNIP1 deficiency, but no functional analyses of the variants or patient cells were performed.

- PMID: 32905580 (2020) - Three cases from unrelated families, all harbouring novel biallelic variants in FNIP1. Clinical manifestations in all patients include hypertrophic cardiomyopathy, severe and/or recurrent infections, absent circulating B-cells, and agammaglobulinemia; as well as either severe or intermittent neutropenia in two cases. Functional studies showed impairment of B-cell metabolism, including disruptions to mitochondrial numbers/activity and the PI3K/AKT pathway.
Sources: Literature
Mendeliome v0.4496 TAOK1 Zornitza Stark Phenotypes for gene: TAOK1 were changed from to TAOK1-related neurodevelopmental disorder
Mendeliome v0.4493 TAOK1 Zornitza Stark reviewed gene: TAOK1: Rating: GREEN; Mode of pathogenicity: None; Publications: 31230721; Phenotypes: TAOK1-related neurodevelopmental disorder; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4475 MEIS2 Michelle Torres reviewed gene: MEIS2: Rating: GREEN; Mode of pathogenicity: None; Publications: 25712757; Phenotypes: Cleft palate, cardiac defects, and mental retardation (MIM#600987); Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4463 NAXE Zornitza Stark changed review comment from: Early-onset progressive encephalopathy with brain edema and/or leukoencephalopathy-1 (PEBEL1) is an autosomal recessive severe neurometabolic disorder characterized by rapidly progressive neurologic deterioration that is usually associated with a febrile illness. Affected infants tend to show normal early development followed by acute psychomotor regression with ataxia, hypotonia, respiratory insufficiency, and seizures, resulting in coma and death in the first years of life. Brain imaging shows multiple abnormalities, including brain edema and signal abnormalities in the cortical and subcortical regions. More than 5 unrelated families reported.; to: Early-onset progressive encephalopathy with brain oedema and/or leukoencephalopathy-1 (PEBEL1) is an autosomal recessive severe neurometabolic disorder characterized by rapidly progressive neurologic deterioration that is usually associated with a febrile illness. Affected infants tend to show normal early development followed by acute psychomotor regression with ataxia, hypotonia, respiratory insufficiency, and seizures, resulting in coma and death in the first years of life. Brain imaging shows multiple abnormalities, including brain edema and signal abnormalities in the cortical and subcortical regions. More than 5 unrelated families reported.
Mendeliome v0.4398 SVBP Zornitza Stark changed review comment from: 5 unrelated families with homozygous mutations in SVBP. The mutations segregated with the disorder in all families. In vitro functional cellular expression studies showed that protein levels of the SVBP mutants were barely detectable, suggesting instability, and that the mutant proteins had lost VASH/SVBP catalytic detyrosination activity toward tubulin. Knockdown of about 50% Svbp expression using shRNA in rat hippocampal neurons impaired the formation of excitatory synapses compared to controls.
Sources: Literature; to: 5 unrelated families with homozygous mutations in SVBP. Some shared the same founder variant, p.Q28*. The mutations segregated with the disorder in all families. In vitro functional cellular expression studies showed that protein levels of the SVBP mutants were barely detectable, suggesting instability, and that the mutant proteins had lost VASH/SVBP catalytic detyrosination activity toward tubulin. Knockdown of about 50% Svbp expression using shRNA in rat hippocampal neurons impaired the formation of excitatory synapses compared to controls.
Sources: Literature
Mendeliome v0.4395 SQSTM1 Zornitza Stark changed review comment from: Four unrelated families, presenting feature of this progressive neurological disorder was ataxia.; to: Nine individuals from four unrelated families.
Mendeliome v0.4392 SLC25A46 Zornitza Stark changed review comment from: Age of onset is variable, but childhood onset described. Ataxia is a feature.; to: Hereditary motor and sensory neuropathy type VIB is an autosomal recessive complex progressive neurologic disorder characterized mainly by early-onset optic atrophy resulting in progressive visual loss and peripheral axonal sensorimotor neuropathy with highly variable age at onset and severity. Affected individuals also have cerebellar or pontocerebellar atrophy on brain imaging, and they show abnormal movements, such as ataxia, dysmetria, and myoclonus.

At least 10 unrelated families reported, supportive functional data.
Mendeliome v0.4389 MAPK8IP3 Zornitza Stark edited their review of gene: MAPK8IP3: Added comment: 18 unrelated individuals reported with de novo variants and a neurodevelopmental disorder characterised by global developmental delay, variably impaired intellectual development, and poor or absent speech. Additional features may include hypotonia, spasticity, or ataxia. About half have abnormal findings on brain imaging, including cerebral or cerebellar atrophy, loss of white matter volume, thin corpus callosum, and perisylvian polymicrogyria. Seizures are not a prominent finding, and nonspecific dysmorphic facial features are described.; Changed publications: 30612693, 30945334
Mendeliome v0.4383 LAMA1 Zornitza Stark changed review comment from: Ataxia is part of the phenotype.
Sources: Expert list; to: Five unrelated families reported.
Sources: Expert list
Mendeliome v0.4380 KCNA2 Zornitza Stark commented on gene: KCNA2: Review of 23 affected individuals in PMID 29050392: some variants are LoF and others GoF, and some genotype-phenotype correlations made. The main differences were (i) predominant focal (loss-of-function) versus generalized (gain-of-function) seizures and corresponding epileptic discharges with prominent sleep activation in most cases with loss-of-function mutations; (ii) more severe epilepsy, developmental problems and ataxia, and atrophy of the cerebellum or even the whole brain in about half of the patients with gain-of-function mutations; and (iii) most severe early-onset phenotypes, occasionally with neonatal onset epilepsy and developmental impairment, as well as generalised and focal seizures and EEG abnormalities for patients with gain- and loss-of-function mutations.
Mendeliome v0.4368 ATP8A2 Zornitza Stark changed review comment from: Multiple individuals from unrelated families reported with bi-allelic variants in this gene and neurological phenotypes including intellectual disability.
Sources: Expert list; to: 10 individuals from six unrelated families reported with bi-allelic variants in this gene and neurological phenotypes including intellectual disability.
Sources: Expert list
Mendeliome v0.4355 SOS1 Zornitza Stark edited their review of gene: SOS1: Added comment: Over 50 individuals reported with SOS1 variants and a Noonan syndrome phenotype. Pulmonic stenosis tends to be more frequent compared to those with PTPN11 mutations, and atrial septal defect is relatively rare. Ectodermal features including keratosis pilaris and curly hair are significantly more prevalent compared with the general Noonan population. Height below the third percentile and learning disability are observed in fewer individuals compared with Noonan syndrome in general. In contrast, macrocephaly is overrepresented among those with SOS1 mutations.; Changed rating: GREEN; Changed mode of pathogenicity: Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments; Changed publications: 17143285, 17143282, 28884940, 17586837; Changed phenotypes: Noonan syndrome 4, MIM# 610733; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4320 CACNA1E Zornitza Stark changed review comment from: At least 30 unrelated patients reported with heterozygous variants in this gene; primarily a seizure disorder, often with profound intellectual disability.; to: At least 30 unrelated patients reported with heterozygous variants in this gene; primarily a seizure disorder, often with profound intellectual disability. Additional common features included spastic quadriplegia, hyperreflexia, hyperkinetic movements, dystonia, myoclonus, clonus, poor or absent eye contact, nystagmus, cortical visual impairment, and loss of head control. Thirteen patients had congenital contractures and 13 had macrocephaly.
Mendeliome v0.4317 ATAD1 Zornitza Stark changed review comment from: Severe progressive neurological disorder, severe/profound intellectual disability is a feature; to: Hyperekplexia-4 is an autosomal recessive severe neurologic disorder apparent at birth. Three unrelated families reported. Affected infants have extreme hypertonia and appear stiff and rigid. They have little if any development, poor or absent visual contact, and no spontaneous movement, consistent with an encephalopathy. Some patients have early-onset refractory seizures. Severe progressive neurological disorder, severe/profound intellectual disability is a feature.
Mendeliome v0.4315 ADAT1 Zornitza Stark gene: ADAT1 was added
gene: ADAT1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ADAT1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ADAT1 were set to 28180185; 29390050; 29659736
Phenotypes for gene: ADAT1 were set to Hyperekplexia 4, MIM#618011
Review for gene: ADAT1 was set to GREEN
Added comment: Hyperekplexia-4 is an autosomal recessive severe neurologic disorder apparent at birth. Three unrelated families reported. Affected infants have extreme hypertonia and appear stiff and rigid. They have little if any development, poor or absent visual contact, and no spontaneous movement, consistent with an encephalopathy. Some patients have early-onset refractory seizures.
Sources: Expert list
Mendeliome v0.4309 OCA2 Elena Savva changed review comment from: Single variant found causing AD OCA - p.G780S in two families (Lee, 2020) -> GOF suggested

Complete penetrance for oculocutaneous albininism but variable expressivity (PMID: 24518832). No variable expressivity or incomplete penetrance reported in GeneReviews.

Loss of function; to: Single variant found causing AD OCA - p.G780S in two families (Lee, 2020) -> GOF suggested

Complete penetrance for oculocutaneous albininism but variable expressivity (PMID: 24518832). No variable expressivity or incomplete penetrance reported in GeneReviews.

Loss of function

2.7kb deletion is very common in sub-Saharan African populations (GeneReviews)
Mendeliome v0.4309 ZSWIM6 Zornitza Stark changed review comment from: MIM #617865 (NEDMAGA): A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X)identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype.
MIM#603671 (acromelic frontonasal dysplasia): recurrent missense identified in 6 unrelated families, p.Arg1163Trp; to: MIM #617865 (NEDMAGA): A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X) identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype.
MIM#603671 (acromelic frontonasal dysplasia): recurrent missense identified in 6 unrelated families, p.Arg1163Trp
Mendeliome v0.4309 ZSWIM6 Zornitza Stark changed review comment from: MIM #617865 A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X)identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype.
MIM#603671: recurrent missense identified in 6 unrelated families, p.Arg1163Trp; to: MIM #617865 (NEDMAGA): A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X)identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype.
MIM#603671 (acromelic frontonasal dysplasia): recurrent missense identified in 6 unrelated families, p.Arg1163Trp
Mendeliome v0.4299 ANGPT2 Zornitza Stark gene: ANGPT2 was added
gene: ANGPT2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ANGPT2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ANGPT2 were set to https://stm.sciencemag.org/content/12/560/eaax8013
Phenotypes for gene: ANGPT2 were set to Primary lymphoedema
Review for gene: ANGPT2 was set to GREEN
Added comment: Five unrelated individuals reported with primary lymphedema and variants in this gene, together with functional data.
Sources: Literature
Mendeliome v0.4298 UBR4 Zornitza Stark changed review comment from: Episodic ataxia reported in two families, but another molecular diagnosis present in the second, so suggested as a modifier. Only one individual reported with childhood-onset progressive neurological disorder as part of a large paper proposing multiple candidate genes.; to: Episodic ataxia reported in four families, but another molecular diagnosis present in the some, so suggested as a modifier. Variants are missense, with no supportive segregation or functional data, some are present at a low level in population databases. Only one individual reported with childhood-onset progressive neurological disorder as part of a large paper proposing multiple candidate genes.
Mendeliome v0.4281 TLR7 Zornitza Stark Phenotypes for gene: TLR7 were changed from to Immunodeficiency 74, COVID19-related, X-linked, MIM# 301051
Mendeliome v0.4259 WASHC4 Zornitza Stark gene: WASHC4 was added
gene: WASHC4 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: WASHC4 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: WASHC4 were set to 31953988; 21498477
Phenotypes for gene: WASHC4 were set to Mental retardation, autosomal recessive 43, MIM #615817
Review for gene: WASHC4 was set to GREEN
Added comment: Three unrelated families reported.
Sources: Literature
Mendeliome v0.4257 DNAJC7 Seb Lunke gene: DNAJC7 was added
gene: DNAJC7 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DNAJC7 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: DNAJC7 were set to 31768050
Phenotypes for gene: DNAJC7 were set to amyotrophic lateral sclerosis
Review for gene: DNAJC7 was set to AMBER
Added comment: Two cohort studies in ALS patients identified 11 and 1 patient, respectively, with variants in DNAJC7. Seven of these are putative PTVs. However gene described as risk factor, unclear why.

DOI: https://doi.org/10.1212/NXG.0000000000000503
Sources: Literature
Mendeliome v0.4256 SVIL Melanie Marty edited their review of gene: SVIL: Added comment: Four patients from two unrelated consanguineous families with a childhood/adolescence onset of a myopathy associated with homozygous loss-of-function mutations in SVIL. Wide neck, anteverted shoulders and prominent trapezius muscles together with variable contractures were characteristic features. Functional studies on muscle biopsies showed complete loss protein in muscle fibres by western blot.; Changed rating: AMBER
Mendeliome v0.4256 CFAP58 Crystle Lee edited their review of gene: CFAP58: Added comment: Biallelic variants reported in 5 unrelated males with nultiple morphological abnormalities of the sperm flagella (MMAF). Knockout mice were infertile.; Changed rating: GREEN; Changed publications: 32791035; Changed phenotypes: Multiple morphological abnormalities of the sperm flagella (MMAF) (PMID: 32791035); Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.4252 SVIL Zornitza Stark Added comment: Comment when marking as ready: Two unrelated families only.
Mendeliome v0.4250 SVIL Melanie Marty gene: SVIL was added
gene: SVIL was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SVIL was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SVIL were set to 32779703
Phenotypes for gene: SVIL were set to myopathy
Penetrance for gene: SVIL were set to unknown
Review for gene: SVIL was set to GREEN
Added comment: Four patients from two unrelated consanguineous families with a childhood/adolescence onset of a myopathy associated with homozygous loss-of-function mutations in SVIL. Wide neck, anteverted shoulders and prominent trapezius muscles together with variable contractures were characteristic features. Functional studies on muscle biopsies showed complete loss protein in muscle fibres by western blot.
Sources: Literature
Mendeliome v0.4250 CFAP58 Crystle Lee gene: CFAP58 was added
gene: CFAP58 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: CFAP58 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CFAP58 were set to 32791035
Phenotypes for gene: CFAP58 were set to Multiple morphological abnormalities of the sperm flagella (MMAF) (PMID: 32791035)
Review for gene: CFAP58 was set to AMBER
Added comment: 5 unrelated males reported with biallelic loss of function variants. Knockout mice were infertile (Abstract only)
Sources: Expert Review
Mendeliome v0.4242 MYSM1 Zornitza Stark changed review comment from: early-onset anaemia, leukopaenia, and decreased B cells, may have thrombocytopaenia or variable additional non-haematologic features, such as facial dysmorphism, skeletal anomalies, and mild developmental delay
Sources: Expert list; to: Early-onset anaemia, leukopaenia, and decreased B cells, may have thrombocytopaenia or variable additional non-haematologic features, such as facial dysmorphism, skeletal anomalies, and mild developmental delay. At least 4 unrelated families reported.
Sources: Expert list
Mendeliome v0.4229 TET2 Zornitza Stark changed review comment from: PMID 32518946: 3 children with an immune dysregulation syndrome of susceptibility to infection, lymphadenopathy, hepatosplenomegaly, developmental delay, autoimmunity, and lymphoma of B-cell (n = 2) or T-cell (n = 1) origin, and bi-allelic variants in TET2.; to: Bi-allelic variants PMID 32518946: 3 children with an immune dysregulation syndrome of susceptibility to infection, lymphadenopathy, hepatosplenomegaly, developmental delay, autoimmunity, and lymphoma of B-cell (n = 2) or T-cell (n = 1) origin, and bi-allelic variants in TET2.
Mendeliome v0.4229 TET2 Zornitza Stark edited their review of gene: TET2: Added comment: PMID 32518946: 3 children with an immune dysregulation syndrome of susceptibility to infection, lymphadenopathy, hepatosplenomegaly, developmental delay, autoimmunity, and lymphoma of B-cell (n = 2) or T-cell (n = 1) origin, and bi-allelic variants in TET2.; Changed rating: GREEN; Changed publications: 30890702, 31827242, 32330418, 32518946; Changed phenotypes: Dementia, Lymphoma/myeloid malignancy, Immunodeficiency; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.4221 SETD1B Zornitza Stark Phenotypes for gene: SETD1B were changed from Epilepsy with myoclonic absences; intellectual disability; SETD1B-related neurodevelopmental disorder to Epilepsy with myoclonic absences; intellectual disability; Intellectual developmental disorder with seizures and language delay (IDDSELD), MIM#619000
Mendeliome v0.4202 DHX16 Zornitza Stark gene: DHX16 was added
gene: DHX16 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DHX16 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DHX16 were set to 31256877
Phenotypes for gene: DHX16 were set to Neuromuscular disease and ocular or auditory anomalies with or without seizures, MIM# 618733
Review for gene: DHX16 was set to GREEN
Added comment: Four unrelated individuals reported with de novo missense variants in this gene. Three of the individuals died in infancy, so phenotypic spectrum difficult to discern. Two had seizures. Individual with long-term survival had a progressive course, evidence of myopathy, loss of hearing and vision, and normal IQ.
Sources: Literature
Mendeliome v0.4198 DHX37 Zornitza Stark edited their review of gene: DHX37: Added comment: Bi-allelic disease: 5 unrelated families with bi-allelic variants, all with ID as part of the phenotype, which also includes congenital anomalies particularly affecting the vertebrae and heart, but also some with microcephaly, brain anomalies.; Changed publications: 31337883, 31745530, 26539891, 31256877; Changed phenotypes: 46,XY gonadal dysgenesis, testicular regression syndrome (TRS), Neurodevelopmental disorder with brain anomalies and with or without vertebral or cardiac anomalies, MIM#618731; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.4181 JAK1 Zornitza Stark edited their review of gene: JAK1: Changed phenotypes: Eosinophilia, Eosinophilic enteritis, Thyroid disease, Poor growth, Viral infections, Susceptibility to mycobacteria and viruses, Autoinflammation, immunde dysregulation, and eosinophilia, MIM# 618999
Mendeliome v0.4134 TRAPPC2L Arina Puzriakova changed review comment from: Gene is associated with Encephalopathy, progressive, early-onset, with episodic rhabdomyolysis in OMIM, but not in G2P.

PMID: 30120216 (2018) - Two unrelated probands with an identical homozygous missense (c.109G>T, p.Asp37Tyr) variant in TRAPPC2L. Both individuals presented neurodevelopmental delay, febrile illness-induced encephalopathy, and episodic rhabdomyolysis, followed by developmental arrest, seizures and tetraplegia. The variant segregated with the phenotype in each family, and haplotype analysis suggested a founder effect.

The mutant protein was expressed in patient fibroblasts, but displayed membrane trafficking delays. Studies in yeast showed that the variant impaired interaction with TRAPPC10, and increased levels of the active RAB11.


PMID: 32843486 (2020) - In an Ashkenazi Jewish family with three affected sibs with GDD/ID, WGS revealed a segregating homozygous missense variant (c.5G>C, p.Ala2Gly) in the TRAPPC2L gene. No seizures, brain MRI abnormalities, or illness provoked regression were documented in this family.

Comparable to the previous study, the variant resulted in delayed ER-to-Golgi trafficking and elevated levels of active RAB11. Studies using yeast and in vitro binding, showed that the variant disrupted interaction with another core TRAPP protein, TRAPPC6a.
Sources: Literature; to: Total of three families, but two share a founder variant, and there are some disparities between the clinical presentations reported in the two publications. Rating Amber as additional cases required to delineate the genotype-phenotype relationship.

PMID: 30120216 (2018) - Two unrelated probands with an identical homozygous missense (c.109G>T, p.Asp37Tyr) variant in TRAPPC2L. Both individuals presented neurodevelopmental delay, febrile illness-induced encephalopathy, and episodic rhabdomyolysis, followed by developmental arrest, seizures and tetraplegia. The variant segregated with the phenotype in each family, and haplotype analysis suggested a founder effect.

The mutant protein was expressed in patient fibroblasts, but displayed membrane trafficking delays. Studies in yeast showed that the variant impaired interaction with TRAPPC10, and increased levels of the active RAB11.


PMID: 32843486 (2020) - In an Ashkenazi Jewish family with three affected sibs with GDD/ID, WGS revealed a segregating homozygous missense variant (c.5G>C, p.Ala2Gly) in the TRAPPC2L gene. No seizures, brain MRI abnormalities, or illness provoked regression were documented in this family.

Comparable to the previous study, the variant resulted in delayed ER-to-Golgi trafficking and elevated levels of active RAB11. Studies using yeast and in vitro binding, showed that the variant disrupted interaction with another core TRAPP protein, TRAPPC6a.

Sources: Literature
Mendeliome v0.4134 TRAPPC2L Arina Puzriakova gene: TRAPPC2L was added
gene: TRAPPC2L was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TRAPPC2L was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TRAPPC2L were set to 30120216; 32843486
Phenotypes for gene: TRAPPC2L were set to Encephalopathy, progressive, early-onset, with episodic rhabdomyolysis, 618331
Review for gene: TRAPPC2L was set to AMBER
Added comment: Gene is associated with Encephalopathy, progressive, early-onset, with episodic rhabdomyolysis in OMIM, but not in G2P.

PMID: 30120216 (2018) - Two unrelated probands with an identical homozygous missense (c.109G>T, p.Asp37Tyr) variant in TRAPPC2L. Both individuals presented neurodevelopmental delay, febrile illness-induced encephalopathy, and episodic rhabdomyolysis, followed by developmental arrest, seizures and tetraplegia. The variant segregated with the phenotype in each family, and haplotype analysis suggested a founder effect.

The mutant protein was expressed in patient fibroblasts, but displayed membrane trafficking delays. Studies in yeast showed that the variant impaired interaction with TRAPPC10, and increased levels of the active RAB11.


PMID: 32843486 (2020) - In an Ashkenazi Jewish family with three affected sibs with GDD/ID, WGS revealed a segregating homozygous missense variant (c.5G>C, p.Ala2Gly) in the TRAPPC2L gene. No seizures, brain MRI abnormalities, or illness provoked regression were documented in this family.

Comparable to the previous study, the variant resulted in delayed ER-to-Golgi trafficking and elevated levels of active RAB11. Studies using yeast and in vitro binding, showed that the variant disrupted interaction with another core TRAPP protein, TRAPPC6a.
Sources: Literature
Mendeliome v0.4134 TOGARAM1 Arina Puzriakova gene: TOGARAM1 was added
gene: TOGARAM1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TOGARAM1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TOGARAM1 were set to 32747439
Phenotypes for gene: TOGARAM1 were set to Cleft of the lip and palate; Microphthalmia; Cerebral dysgenesis; Hydrocephalus
Added comment: PMID: 32747439 (2020) - Novel gene-disease association. In two sibling fetuses with a malformation disorder characterised by microcephaly, severe cleft lip and palate, microphthalmia, and brain anomalies, WES revealed compound heterozygous variants ([c.1102C>T, p.Arg368Trp] and [c.3619C>T, p.Arg1207*]) in the TOGARAM1 gene.

Functional analysis of the missense variant in a C. elegans model showed impaired lipophilic dye uptake, with shorter and altered cilia in sensory neurons. In vitro analysis revealed faster microtubule polymerisation compared to wild-type, suggesting aberrant tubulin binding.
Sources: Literature
Mendeliome v0.4131 TRIT1 Zornitza Stark Phenotypes for gene: TRIT1 were changed from to Combined oxidative phosphorylation deficiency 35, MIM#617873
Mendeliome v0.4128 TRIT1 Zornitza Stark reviewed gene: TRIT1: Rating: GREEN; Mode of pathogenicity: None; Publications: 32088416, 24901367, 28185376, 30977854; Phenotypes: Combined oxidative phosphorylation deficiency 35, MIM#617873; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.4125 CRIPT Ain Roesley gene: CRIPT was added
gene: CRIPT was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CRIPT was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CRIPT were set to 24389050; 27250922
Phenotypes for gene: CRIPT were set to Short stature with microcephaly and distinctive facies (MIM#615789)
Penetrance for gene: CRIPT were set to unknown
Review for gene: CRIPT was set to AMBER
Added comment: PMID: 24389050
- 2 unrelated probands homozygous for PTVs. However 1 was deceased and DNA was unavailable therefore parents were sequenced

PMID: 27250922
- 1x proband
- het for a missense which was maternally inherited. Because the father was negative for SNVs, they did CMA and found a small heterozygous deletion 1.6kb in size encompassing exon 1 of CRIPT. This deletion was paternally inherited

*did not find new reports since
Sources: Literature
Mendeliome v0.4113 GMNN Zornitza Stark changed review comment from: Three unrelated individuals reported.; to: Three unrelated individuals reported, all variants in exon 2 (first coding exon).
Mendeliome v0.4101 TRPM7 Zornitza Stark Phenotypes for gene: TRPM7 were changed from {Amyotrophic lateral sclerosis-parkinsonism/dementia complex, susceptibility to}, MIM# 105500 to {Amyotrophic lateral sclerosis-parkinsonism/dementia complex, susceptibility to}, MIM# 105500; Cardiac arrhythmia, stillbirth
Mendeliome v0.4097 TRPM7 Zornitza Stark edited their review of gene: TRPM7: Added comment: Ion channel expressed in the nervous and cardiac systems. The variant associated with ALS/dementia in the Guam population, p.Thr1482Ile is present in >23,000 hets in gnomad, which is out of keeping for a rare Mendelian disorder. Note recent publication associating missense variants with cardiac arrhythmia and stillbirth, with some functional data provided to substantiate effect of variant on protein function but not necessarily establish gene-disease association.; Changed rating: AMBER; Changed publications: 32503408, 31423533; Changed phenotypes: {Amyotrophic lateral sclerosis-parkinsonism/dementia complex, susceptibility to}, MIM# 105500, Cardiac arrhythmia, stillbirth; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4097 CHCHD10 Zornitza Stark Phenotypes for gene: CHCHD10 were changed from to Frontotemporal dementia and/or amyotrophic lateral sclerosis 2 615911; Spinal muscular atrophy, Jokela type 615048; Myopathy, isolated mitochondrial, autosomal dominant 616209
Mendeliome v0.4093 CHCHD10 Zornitza Stark reviewed gene: CHCHD10: Rating: GREEN; Mode of pathogenicity: Other; Publications: 24934289, 25428574, 25193783, 32042922, 31690696, 30877432, 30874923; Phenotypes: Frontotemporal dementia and/or amyotrophic lateral sclerosis 2 615911, Spinal muscular atrophy, Jokela type 615048, Myopathy, isolated mitochondrial, autosomal dominant 616209; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4091 CTNND1 Eleanor Williams changed review comment from: PMID: 32196547 - Alharatani et al 2020 - report an expanded phenotype for CTNND1 patients. They report 13 individuals from nine families with novel protein-truncating variants in CTNND1 identified by WES. The mutations were not previously described in blepharocheilodontic (BCD), orofacial cleft cases nor in gnomAD. 8 patients had de novo variants, 2 inherited from affected parents, 2 participants inherited a variant from a parent with a mild phenotype. Additional phenotypic features seen include mild limb phenotypes (9/13), cardiovascular anomalies (6/13) and Developmental delay and other neurodevelopmental problems (8/13).; to: PMID: 32196547 - Alharatani et al 2020 - report an expanded phenotype for CTNND1 patients. They report 13 individuals from nine families with novel protein-truncating variants in CTNND1 identified by WES. The mutations were not previously described in blepharocheilodontic (BCD), orofacial cleft cases nor in gnomAD. 8 patients had de novo variants, 2 inherited from affected parents, 2 participants inherited a variant from a parent with a mild phenotype. 8/13 patients showed cleft palate Additional phenotypic features seen include mild limb phenotypes (9/13), cardiovascular anomalies (6/13) and Developmental delay and other neurodevelopmental problems (8/13).
Mendeliome v0.4091 TRPM7 Eleanor Williams commented on gene: TRPM7: PMID: 31423533 - Cartwright et al 2020 - functional studies on four heterozygous nonsynonymous variants that were observed in TRPM7 in four individual cases of unexplained still birth which were screened for variants in 35 candidate genes in PMID: 29874177 (Munroe et al 2018). TRPM7 is a ubiquitously expressed ion channel known to regulate cardiac development and repolarization in mice. They found two variants in TRPM7, p.G179V and p.T860M, reduce ion channel current expression, which in the case of p.T860M is likely due to rapid degradation mediated by the proteasome. In addition, the p.R494Q TRPM7 variant significantly increases TRPM7 ion channel current, in a cell-type specific manner. They believe that TRPM7 may play a key role in ensuring correct cardiac development of the fetus.
Mendeliome v0.4091 ZFYVE19 Arina Puzriakova gene: ZFYVE19 was added
gene: ZFYVE19 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZFYVE19 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZFYVE19 were set to 32737136
Phenotypes for gene: ZFYVE19 were set to Cholestasis
Review for gene: ZFYVE19 was set to GREEN
Added comment: PMID: 32737136 (2020) - Nine Han Chinese children from seven families with biallelic, predicted complete LoF variants in ZFYVE19. All patients had high-GGT intrahepatic cholestasis, portal hypertension, and histopathological features of the ductal plate malformation/congenital hepatic fibrosis.

ZFYVE19 depletion in cultured cells from one patient yielded centriolar and axonemal abnormalities, and immunostaining for two ciliary proteins DCDC2 and ACALT showed abnormal localisation in patient cholangiocytes, indicating this as a novel ciliopathy disorder.
Sources: Literature
Mendeliome v0.4091 SRD5A3 Zornitza Stark Phenotypes for gene: SRD5A3 were changed from to Congenital disorder of glycosylation, type Iq, MIM#612379; Kahrizi syndrome, MIM# 612713
Mendeliome v0.4088 SRD5A3 Zornitza Stark edited their review of gene: SRD5A3: Added comment: Over 25 families reported, well established gene-disease association for CDG. Allelic disorder Kahrizi syndrome has overlapping features, may not be distinct entity.; Changed publications: 32424323; Changed phenotypes: Congenital disorder of glycosylation, type Iq, MIM#612379, Kahrizi syndrome, MIM# 612713
Mendeliome v0.4066 KDM1A Zornitza Stark reviewed gene: KDM1A: Rating: GREEN; Mode of pathogenicity: None; Publications: 26656649, 24838796, 27094131; Phenotypes: Cleft palate, psychomotor retardation, and distinctive facial features 616728; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.4066 KDM1A Zornitza Stark Phenotypes for gene: KDM1A were changed from to Cleft palate, psychomotor retardation, and distinctive facial features 616728; Multiple myeloma
Mendeliome v0.4059 KDM1A Elena Savva reviewed gene: KDM1A: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 29559475, 27094131; Phenotypes: Cleft palate, psychomotor retardation, and distinctive facial features 616728, Multiple myeloma; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.4058 YRDC Zornitza Stark gene: YRDC was added
gene: YRDC was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: YRDC was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: YRDC were set to 31481669
Phenotypes for gene: YRDC were set to Galloway-Mowat syndrome
Review for gene: YRDC was set to GREEN
Added comment: Three individuals from two unrelated families with typical features of Galloway-Mowat syndrome including proteinuria, microcephaly, developmental delay and brain malformations. Supportive functional data.
Sources: Literature
Mendeliome v0.4025 TSEN2 Zornitza Stark edited their review of gene: TSEN2: Added comment: At least 3 unrelated families reported.; Changed rating: GREEN; Changed publications: 23562994, 20952379; Changed phenotypes: Pontocerebellar hypoplasia type 2B, MIM# 612389
Mendeliome v0.4002 AARS2 Zornitza Stark Phenotypes for gene: AARS2 were changed from to Combined oxidative phosphorylation deficiency 8 MIM#614096; Leukoencephalopathy, progressive, with ovarian failure MIM#615889; MONDO:0013570
Mendeliome v0.3999 AARS2 Zornitza Stark edited their review of gene: AARS2: Changed phenotypes: Combined oxidative phosphorylation deficiency 8 MIM#614096, Leukoencephalopathy, progressive, with ovarian failure MIM#615889, MONDO:0013570
Mendeliome v0.3999 AARS2 Zornitza Stark reviewed gene: AARS2: Rating: GREEN; Mode of pathogenicity: None; Publications: 30706699, 27839525, 21549344, 25058219, 24808023; Phenotypes: Combined oxidative phosphorylation deficiency 8 MIM#614096, Leukoencephalopathy, progressive, with ovarian failure MIM#615889; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3971 DCX Zornitza Stark Mode of inheritance for gene: DCX was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3970 DCX Zornitza Stark reviewed gene: DCX: Rating: GREEN; Mode of pathogenicity: None; Publications: 10915612, 9489699, 12552055; Phenotypes: Lissencephaly, X-linked, MIM# 300067, Subcortical laminal heterotopia, X-linked 300067; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3970 TLR7 Zornitza Stark reviewed gene: TLR7: Rating: GREEN; Mode of pathogenicity: None; Publications: 32706371; Phenotypes: Immunodeficiency 74, COVID19-related, X-linked, MIM# 301051; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Mendeliome v0.3969 MRPL44 Zornitza Stark Phenotypes for gene: MRPL44 were changed from to Combined oxidative phosphorylation deficiency 16, MIM# 615395
Mendeliome v0.3966 MRPL44 Zornitza Stark reviewed gene: MRPL44: Rating: GREEN; Mode of pathogenicity: None; Publications: 23315540, 25797485; Phenotypes: Combined oxidative phosphorylation deficiency 16, MIM# 615395; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3966 KBTBD13 Zornitza Stark Phenotypes for gene: KBTBD13 were changed from to Nemaline myopathy 6, autosomal dominant, MIM# 609273; Hereditary motor neuropathy; late-onset limb girdle muscular dystrophy
Mendeliome v0.3963 KBTBD13 Zornitza Stark reviewed gene: KBTBD13: Rating: ; Mode of pathogenicity: None; Publications: 11731279, 21104864; Phenotypes: Nemaline myopathy 6, autosomal dominant, MIM# 609273, Hereditary motor neuropathy, late-onset limb girdle muscular dystrophy; Mode of inheritance: None
Mendeliome v0.3961 KBTBD13 Elena Savva reviewed gene: KBTBD13: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 28403181, 31167812, 31671076, 30208948; Phenotypes: Nemaline myopathy 6, autosomal dominant, 609273, Hereditary motor neuropathy, late-onset limb girdle muscular dystrophy; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Mendeliome v0.3951 ALG12 Zornitza Stark Phenotypes for gene: ALG12 were changed from to Congenital disorder of glycosylation, type Ig, MIM# 607143
Mendeliome v0.3945 ALG12 Zornitza Stark reviewed gene: ALG12: Rating: GREEN; Mode of pathogenicity: None; Publications: 31481313; Phenotypes: Congenital disorder of glycosylation, type Ig, MIM# 607143; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3945 ALG11 Zornitza Stark Phenotypes for gene: ALG11 were changed from to Congenital disorder of glycosylation, type Ip, MIM# 613661
Mendeliome v0.3942 ALG11 Zornitza Stark reviewed gene: ALG11: Rating: GREEN; Mode of pathogenicity: None; Publications: 30676690; Phenotypes: Congenital disorder of glycosylation, type Ip, MIM# 613661; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3938 PDE2A Zornitza Stark gene: PDE2A was added
gene: PDE2A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PDE2A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PDE2A were set to 32467598; 32196122; 29392776
Phenotypes for gene: PDE2A were set to Paroxysmal dyskinesia
Review for gene: PDE2A was set to GREEN
Added comment: Four unrelated families reported with childhood-onset refractory paroxysmal dyskinesia with cognitive impairment, sometimes associated with choreodystonia and interictal baseline EEG abnormalities or epilepsy. One of the reports characterises the disorder as 'Rett-like'.
Sources: Literature
Mendeliome v0.3933 RRAGC Zornitza Stark Phenotypes for gene: RRAGC were changed from to Dilated cardiomyopathy; cataract
Mendeliome v0.3930 RRAGC Zornitza Stark reviewed gene: RRAGC: Rating: RED; Mode of pathogenicity: None; Publications: 27234373; Phenotypes: Dilated cardiomyopathy, cataract; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.3892 FOLR1 Zornitza Stark Phenotypes for gene: FOLR1 were changed from to Neurodegeneration due to cerebral folate transport deficiency, MIM# 613068
Mendeliome v0.3889 FOLR1 Zornitza Stark reviewed gene: FOLR1: Rating: GREEN; Mode of pathogenicity: None; Publications: 19732866, 30420205, 27743887; Phenotypes: Neurodegeneration due to cerebral folate transport deficiency, MIM# 613068; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3872 LMBRD2 Zornitza Stark gene: LMBRD2 was added
gene: LMBRD2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LMBRD2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: LMBRD2 were set to 32820033; https://doi.org/10.1101/797787
Phenotypes for gene: LMBRD2 were set to Global developmental delay; Intellectual disability; Microcephaly; Seizures; Abnormality of nervous system morphology; Abnormality of the eye
Mode of pathogenicity for gene: LMBRD2 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments
Review for gene: LMBRD2 was set to GREEN
Added comment: 13 individuals with dn missense SNVs overall, overlapping features for 10 with available phenotype / a recurring variant has been identified in 2 different studies.

► Malhotra et al (2020 - PMID: 32820033) report on 10 unrelated individuals with de novo missense LMBRD2 variants. Features included DD (9/10), ID (6/8 of relevant age), microcephaly (7/10), seizures (5/10 - >=3 different variants), structural brain abnormalities (e.g. thin CC in 6/9), highly variable ocular abnormalities (5/10) and dysmorphic features in some (7/10 - nonspecific). All had variable prior non-diagnostic genetic tests (CMA, gene panel, mendeliome, karyotype). WES/WGS revealed LMBRD2 missense variants, in all cases de novo. A single individual had additional variants with weaker evidence of pathogenicity. 5 unique missense SNVs and 2 recurrent ones (NM_001007527:c.367T>C - p.Trp123Arg / c.1448G>A - p.Arg483His) were identified. These occurred in different exons. Variants were not present in gnomAD and all had several in silico predictions in favor of a deleterious effect. There was phenotypic variability among individuals with the same variant (e.g. seizures in 1/3 and microchephaly in 2/3 of those harboring R483H). The gene has a pLI of 0 (although o/e ranges from 0.23 to 0.55), %HI of 15.13 and z-score of 2.27. The authors presume that haploinsufficiency may not apply, and consider a gain-of-function/dominant-negative effect more likely. As the authors comment LMBRD2 (LMBR1 domain containing 2) encodes a membrane bound protein with poorly described function. It is widely expressed across tissues with notable expression in human brain (also in Drosophila, or Xenopus laevis). It displays high interspecies conservation. It has been suggested (Paek et al - PMID: 28388415) that LMBRD2 is a potential regulator of β2 adrenoreceptor signalling through involvement in GPCR signalling.

► Kaplanis et al (2020 - https://doi.org/10.1101/797787) in a dataset of 31058 parent-offspring trios (WES) previously identified 3 individuals with developmental disorder, harboring c.1448G>A - p.Arg483His. These individuals (1 from the DDD study, and 2 GeneDx patients) appear in Decipher. [ https://decipher.sanger.ac.uk/ddd/research-variant/40e17c78cc9655a6721006fc1e0c98db/overview ]. The preprint by Kaplanis et al is cited by Malhotra et al, with Arg483His reported in 6 patients overall in both studies.
Sources: Literature
Mendeliome v0.3862 MYOD1 Zornitza Stark gene: MYOD1 was added
gene: MYOD1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MYOD1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MYOD1 were set to 26733463; 30403323; 31260566
Phenotypes for gene: MYOD1 were set to Myopathy, congenital, with diaphragmatic defects, respiratory insufficiency, and dysmorphic facies, MIM# 618975
Review for gene: MYOD1 was set to GREEN
Added comment: Three unrelated families reported.
Sources: Expert list
Mendeliome v0.3839 NCKAP1L Zornitza Stark Phenotypes for gene: NCKAP1L were changed from Immunodeficiency to Immunodeficiency; Immune dysregulation; Immunodeficiency 72 with autoinflammation, MIM# 618982
Mendeliome v0.3834 TAF1C Zornitza Stark gene: TAF1C was added
gene: TAF1C was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: TAF1C was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TAF1C were set to 32779182
Phenotypes for gene: TAF1C were set to Global developmental delay; Intellectual disability; Spasticity; Strabismus; Seizures; Abnormality of nervous system morphology
Review for gene: TAF1C was set to AMBER
Added comment: Knuutinen et al (2020 - PMID: 32779182) report on 2 individuals from 2 consanguineous families, homozygous for TAF1C missense variants. Both presented with an early onset neurological phenotype with severe global DD, ID (2/2 - moderate and profound), spasticity (2/2), ophthalmic findings (strabismus 2/2, nystagmus 1/2). Epilepsy, abnormal brain MRI (cerebral and cerebellar atrophy and white matter hyperintensities) as well and additional findings were reported in one (always the same individual). Following a normal CMA, exome in the first case revealed a homozygous missense SNV (NM_005679.3:c.1165C>T / p.Arg389Cys) supported by in silico predictions. mRNA and protein levels were substantially reduced in fibroblasts from this subject. Only the patient and parents were tested for the variant but not 3 unaffected sibs (fig1). The second individual was homozygous for another missense variant (p.Arg405Cys) also supported by in silico predictions. The girl was the single affected person within the family with an unaffected sib and parents heterozygous for the variant. Several other unaffected relatives in the extended pedigree were either carriers for this variant or homozygous for the wt allele. TAF1C encodes the TATA-box binding protein associated factor (TAF) RNA polymerase I subunit. RNA polymerase I (Pol I) transcribes genes to produce rRNA. For Pol I to initiate transcription, two transcription factors are required : UBF (upstream binding factor encoded by UBTF) and SL1 (selectivity factor 1). The latter is formed by TBP (TATA-binding protein) and 3 Pol I-specific TBP-associated factors (TAFs). A recurrent de novo missense variant in UBTF (encoding the other Pol I transcription factor) causes a disorder with highly similar features. The specific variant acts through a gain-of-function mechanism (and not by LoF which appears to apply for TAF1C based on expression data). The authors hypothesize that altered Pol I activity and resulting ribosomal stress could cause the microcephaly and leukodystrophy (both reported in 1 - the same - individual).
Sources: Expert list
Mendeliome v0.3805 TPM4 Zornitza Stark gene: TPM4 was added
gene: TPM4 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: TPM4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: TPM4 were set to 28134622; 31249973; 21153663
Phenotypes for gene: TPM4 were set to Macrothrombocytopaenia
Review for gene: TPM4 was set to GREEN
Added comment: Three families reported in addition to genome-wide association studies in nearly 70,000 individuals which indicate that SNVs in TPM4 exert an effect on the count and volume of platelets.
Sources: Expert list
Mendeliome v0.3794 SLFN14 Zornitza Stark gene: SLFN14 was added
gene: SLFN14 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SLFN14 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SLFN14 were set to 26280575; 26769223
Phenotypes for gene: SLFN14 were set to Bleeding disorder, platelet-type, 20, MIM# 616913
Review for gene: SLFN14 was set to GREEN
Added comment: At least four unrelated families reported.
Sources: Expert list
Mendeliome v0.3792 PTPRJ Zornitza Stark gene: PTPRJ was added
gene: PTPRJ was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PTPRJ was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PTPRJ were set to 30591527
Phenotypes for gene: PTPRJ were set to Thrombocytopaenia
Review for gene: PTPRJ was set to AMBER
Added comment: Two siblings reported with nonsyndromic thrombocytopenia characterised by spontaneous bleeding, small-sized platelets, and impaired platelet responses to the GPVI agonists collagen and convulxin. Supportive zebrafish model.
Sources: Expert list
Mendeliome v0.3790 PTGS1 Zornitza Stark gene: PTGS1 was added
gene: PTGS1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PTGS1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PTGS1 were set to 32299908; 11442478; 27629384; 8562397
Phenotypes for gene: PTGS1 were set to Platelet dysfunction; bleeding
Review for gene: PTGS1 was set to AMBER
Added comment: Single molecularly characterised family reported. However, note at least two previous older reports where deficiency was identified at protein rather than gene level.
Sources: Expert list
Mendeliome v0.3789 PRKACG Zornitza Stark gene: PRKACG was added
gene: PRKACG was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PRKACG was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PRKACG were set to 25061177; 30819905
Phenotypes for gene: PRKACG were set to Bleeding disorder, platelet-type, 19, MIM# 616176
Review for gene: PRKACG was set to RED
Added comment: Single family reported only. A heterozygous VOUS reported in another individual in PMID 30819905 together with several other VOUS in same individual.
Sources: Expert list
Mendeliome v0.3787 PLAU Zornitza Stark gene: PLAU was added
gene: PLAU was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PLAU was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PLAU were set to 20007542
Phenotypes for gene: PLAU were set to Quebec platelet disorder, MIM# 601709
Review for gene: PLAU was set to GREEN
Added comment: Note this is a tandem 78kb duplication of the gene, multiple families reported.
Sources: Expert list
Mendeliome v0.3785 PLA2G4A Zornitza Stark gene: PLA2G4A was added
gene: PLA2G4A was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PLA2G4A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PLA2G4A were set to 18451993; 25102815; 23268370
Phenotypes for gene: PLA2G4A were set to Gastrointestinal ulceration, recurrent, with dysfunctional platelets, MIM# 618372
Review for gene: PLA2G4A was set to GREEN
Added comment: At least three unrelated individuals reported.
Sources: Expert list
Mendeliome v0.3752 EPHB2 Zornitza Stark Phenotypes for gene: EPHB2 were changed from to Bleeding disorder, platelet-type, 22, MIM# 618462
Mendeliome v0.3748 EPHB2 Zornitza Stark reviewed gene: EPHB2: Rating: AMBER; Mode of pathogenicity: None; Publications: 30213874, 25370417; Phenotypes: Bleeding disorder, platelet-type, 22, MIM# 618462; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3748 ACTN1 Zornitza Stark Phenotypes for gene: ACTN1 were changed from to Bleeding disorder, platelet-type, 15, MIM# 615193
Mendeliome v0.3745 ACTN1 Zornitza Stark reviewed gene: ACTN1: Rating: GREEN; Mode of pathogenicity: None; Publications: 23434115; Phenotypes: Bleeding disorder, platelet-type, 15, MIM# 615193; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.3732 FAM50A Zornitza Stark gene: FAM50A was added
gene: FAM50A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FAM50A was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Publications for gene: FAM50A were set to 32703943
Phenotypes for gene: FAM50A were set to Mental retardation syndrome, X-linked, Armfield type (MIM #300261)
Review for gene: FAM50A was set to GREEN
Added comment: Lee et al (2020 - PMID: 32703943) provide evidence that Armfield X-Linked intellectual disability syndrome is caused by monoallelic FAM50A pathogenic variants. The current review is based only on this reference. The authors provide clinical details on 6 affected individuals from 5 families. Features included postnatal growth delay, DD and ID (6/6 - also evident for those without formal IQ assesment), seizures (3/6 from 2 families), prominent forehead with presence of other facial features and variable head circumference (5th to >97th %le), ocular anomalies (5/6 - strabismus/nystagmus/Axenfeld-Rieger), cardiac (3/6 - ASD/Fallot) and genitourinary anomalies (3/6). In the first of these families (Armfield et al 1999 - PMID: 10398235), linkage analysis followed by additional studies (Sanger, NGS of 718 genes on chrX, X-exome NGS - several refs provided) allowed the identification of a FAM50A variant. Variants in other families were identified by singleton (1 fam) or trio-ES (3 fam). In affected individuals from 3 families, the variant had occurred de novo. Carrier females in the other families were unaffected (based on pedigrees and/or the original publication). XCI was rather biased in most obligate carrier females from the 1st family (although this ranged from 95:5 to 60:40). Missense variants were reported in all affected subjects incl. Trp206Gly, Asp255Gly, Asp255Asn (dn), Glu254Gly (dn), Arg273Trp (dn) (NM_004699.3). Previous studies have demonstrated that FAM50A has ubiquitous expression in human fetal and adult tissues (incl. brain in fetal ones). Immunostaining suggests a nuclear localization for the protein (NIH/3T3 cells). Comparison of protein levels in LCLs from affected males and controls did not demonstrate significant differences. Protein localization for 3 variants (transfection of COS-7 cells) was shown to be similar to wt. Complementation studies in zebrafish provided evidence that the identified variants confer partial loss of function (rescue of the morpholino phenotype with co-injection of wt but not mt mRNA). The zebrafish ko model seemed to recapitulate the abnormal development of cephalic structures and was indicative of diminished/defective neurogenesis. Transcriptional dysregulation was demonstrated in zebrafish (altered levels and mis-splicing). Upregulation of spliceosome effectors was demonstrated in ko zebrafish. Similarly, mRNA expression and splicing defects were demonstrated in LCLs from affected individuals. FAM50A pulldown followed by mass spectrometry in transfected HEK293T cells demonstrated enrichment of binding proteins involved in RNA processing and co-immunoprecipitation assays (transfected U-87 cells) suggested that FAM50A interacts with spliceosome U5 and C-complex proteins. Overall aberrant spliceosome C-complex function is suggested as the underlying pathogenetic mechanism. Several other neurodevelopmental syndromes are caused by variants in genes encoding C-complex affiliated proteins (incl. EFTUD2, EIF4A3, THOC2, etc.).
Sources: Literature
Mendeliome v0.3694 BCOR Zornitza Stark Mode of inheritance for gene: BCOR was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3693 BCOR Zornitza Stark reviewed gene: BCOR: Rating: GREEN; Mode of pathogenicity: None; Publications: 29974297; Phenotypes: Microphthalmia, syndromic 2, MIM# 300166, Oculofaciocardiodental syndrome, Lenz microphthalmia; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3678 AIFM1 Zornitza Stark Phenotypes for gene: AIFM1 were changed from to Combined oxidative phosphorylation deficiency 6, 300816; Cowchock syndrome, 310490; Deafness, X-linked 5, 300614; Spondyloepimetaphyseal dysplasia, X-linked, with hypomyelinating leukodystrophy, 300232
Mendeliome v0.3675 AIFM1 Elena Savva reviewed gene: AIFM1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 28842795; Phenotypes: Combined oxidative phosphorylation deficiency 6, 300816, Cowchock syndrome, 310490, Deafness, X-linked 5, 300614, Spondyloepimetaphyseal dysplasia, X-linked, with hypomyelinating leukodystrophy, 300232; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Mendeliome v0.3675 PIGQ Zornitza Stark edited their review of gene: PIGQ: Added comment: Homozygous or compound heterozygous mutations in PIGQ cause Epileptic encephalopathy, early infantile, 77 (MIM #618548).

Johnstone et al (2020 - PMID: 32588908) describe the phenotype of 7 children (from 6 families) with biallelic PIGQ pathogenic variants. The authors also review the phenotype of 3 subjects previously reported in the literature (by Martin et al, Alazami et al, Starr et al - respective PMIDs: 24463883, 25558065, 31148362).

Affected individuals displayed severe to profound global DD/ID and seizures with onset in the first year of life. There were variable other features incl. - among others - genitourinary, cardiac, skeletal, ophthalmological anomalies, gastrointestinal issues. Within the cohort there was significant morbidity/mortality.

PIGQ encodes phosphatidylinositol glycan anchor biosynthesis class Q protein, playing a role (early) in the biosynthesis of the GPI-anchor. Several genes in the GPI biosynthesis pathway cause multi-system disease with DD/ID and seizures. Flow cytometry has been used in individuals with PIGQ-related disorder. Serum ALP was elevated in some (4) although - as the authors comment - elevations are more typical in disorders affecting later steps of GPI biosynthesis.

More than 10 variants have been reported to date (missense / pLoF).; Changed phenotypes: Epileptic encephalopathy, early infantile, 77, MIM# 618548
Mendeliome v0.3673 SEC61B Zornitza Stark gene: SEC61B was added
gene: SEC61B was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SEC61B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SEC61B were set to 28862642; 30652979; 28375157
Phenotypes for gene: SEC61B were set to Polycystic liver disease with or without renal cysts
Review for gene: SEC61B was set to AMBER
Added comment: Two unrelated individuals reported.
Sources: Expert list
Mendeliome v0.3672 CHI3L1 Zornitza Stark Phenotypes for gene: CHI3L1 were changed from to {Asthma-related traits, susceptibility to, 7} 611960; {Schizophrenia, susceptibility to} 181500
Mendeliome v0.3670 CHI3L1 Zornitza Stark reviewed gene: CHI3L1: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: {Asthma-related traits, susceptibility to, 7} 611960, {Schizophrenia, susceptibility to} 181500; Mode of inheritance: None
Mendeliome v0.3668 NDUFA8 Zornitza Stark gene: NDUFA8 was added
gene: NDUFA8 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NDUFA8 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NDUFA8 were set to 32385911
Phenotypes for gene: NDUFA8 were set to NDUFA8-related mitochondrial disease; Developmental delay; microcehaly; seizures
Review for gene: NDUFA8 was set to RED
Added comment: Single individual reported with homozygous variant, fibroblasts showed apparent biochemical defects in mitochondrial complex I.
Sources: Literature
Mendeliome v0.3666 DLG5 Zornitza Stark gene: DLG5 was added
gene: DLG5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DLG5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DLG5 were set to 32631816
Phenotypes for gene: DLG5 were set to Cystic kidneys, nephrotic syndrome, hydrocephalus, limb abnormalities, congenital heart disease and craniofacial malformations
Review for gene: DLG5 was set to GREEN
Added comment: Four unrelated families reported, supportive Xenopus animal model data.
Sources: Literature
Mendeliome v0.3631 MAPK1 Zornitza Stark gene: MAPK1 was added
gene: MAPK1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MAPK1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MAPK1 were set to 32721402
Phenotypes for gene: MAPK1 were set to Global developmental delay; Intellectual disability; Behavioral abnormality; Growth delay; Abnormality of the face; Abnormality of the neck; Abnormality of the cardiovascular system; Abnormality of the skin
Review for gene: MAPK1 was set to GREEN
Added comment: Motta et al (2020 - PMID: 32721402) report on 7 unrelated individuals harboring de novo missense MAPK1 pathogenic variants.

The phenotype corresponded to a neurodevelopmental disorder and - as the authors comment - consistently included DD, ID , behavioral problems. Postnatal growth delay was observed in approximately half. Hypertelorism, ptosis, downslant of palpebral fissures, wide nasal bridge as low-set/posteriorly rotated ears were among the facial features observed (each in 3 or more subjects within this cohort). Together with short/webbed neck and abnormalities of skin (lentigines / CAL spots) and growth delay these led to clinical suspicion of Noonan s. or disorder of the same pathway in some. Congenital heart defects (ASD, mitral valve insufficiency, though not cardiomyopathy) occurred in 4/7. Bleeding diathesis and lymphedema were reported only once.

MAPK1 encodes the mitogen-activated protein kinase 1 (also known as ERK2) a serine/threonine kinase of the RAS-RAF-MEK-(MAPK/)ERK pathway.

MAPK1 de novo variants were identified in all individuals following trio exome sequencing (and extensive previous genetic investigations which were non-diagnostic).

The distribution of variants, as well as in silico/vitro/vivo studies suggest a GoF effect (boosted signal through the MAPK cascade. MAPK signaling also upregulated in Noonan syndrome).
Sources: Literature
Mendeliome v0.3626 AMBRA1 Bryony Thompson gene: AMBRA1 was added
gene: AMBRA1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: AMBRA1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: AMBRA1 were set to 17589504; 32333458
Phenotypes for gene: AMBRA1 were set to Neural tube defects
Review for gene: AMBRA1 was set to GREEN
Added comment: 5 rare missense variants were identified in 6 cases from a neural tube defect cohort, and 4 (p.Thr80Met, p.Leu274Phe, p.Ser743Phe, and p.Met884Val) of them were functionally validated to affect autophagy regulation in vitro or zebrafish embryo development in vivo. There is also null mouse model with neural tube defects.
Sources: Literature
Mendeliome v0.3624 ERLEC1 Bryony Thompson gene: ERLEC1 was added
gene: ERLEC1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ERLEC1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ERLEC1 were set to 32442352
Phenotypes for gene: ERLEC1 were set to Class III malocclusion
Review for gene: ERLEC1 was set to GREEN
Added comment: A heterozygous missense variant was found to co-segregate with dentofacial deformity in a multi-generational Chinese pedigree (2 unaffected carriers & 11 affected carriers), and 3 additional missense variants were identified in 3 unrelated cases from a sporadic malocclusion cohort. Additional functional assays were conducted to demonstrate that the proper level of ERLEC1 expression is crucial for proper osteogenic differentiation. All identified missense variants were assessed using luciferase reporter assays, and altered activity.
Sources: Literature
Mendeliome v0.3603 NGLY1 Zornitza Stark Phenotypes for gene: NGLY1 were changed from to Congenital disorder of deglycosylation, MIM# 615273
Mendeliome v0.3600 NGLY1 Zornitza Stark reviewed gene: NGLY1: Rating: GREEN; Mode of pathogenicity: None; Publications: 24651605, 27388694; Phenotypes: Congenital disorder of deglycosylation, MIM# 615273; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3590 GNPNAT1 Arina Puzriakova changed review comment from: Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype.
Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation.
Sources: Literature; to: PMID: 32591345 (2020) - Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype.
Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation. Additional cases required to validate pathogenicity of GNPNAT1.
Sources: Literature
Mendeliome v0.3590 GNPNAT1 Arina Puzriakova gene: GNPNAT1 was added
gene: GNPNAT1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GNPNAT1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GNPNAT1 were set to 32591345
Phenotypes for gene: GNPNAT1 were set to Rhizomelic skeletal dysplasia
Review for gene: GNPNAT1 was set to RED
Added comment: Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype.
Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation.
Sources: Literature
Mendeliome v0.3586 IVNS1ABP Bryony Thompson gene: IVNS1ABP was added
gene: IVNS1ABP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IVNS1ABP was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IVNS1ABP were set to 32499645
Phenotypes for gene: IVNS1ABP were set to Primary immunodeficiency
Review for gene: IVNS1ABP was set to GREEN
Added comment: 3 unrelated families with putative loss of function variants. Case features and immunophenotyping of patient cells is suggestive of a combined immune deficiency, based on the ESID definitions of PID subtypes.
Sources: Literature
Mendeliome v0.3582 SOCS1 Bryony Thompson gene: SOCS1 was added
gene: SOCS1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SOCS1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SOCS1 were set to 32499645; 10490099; 10490100
Phenotypes for gene: SOCS1 were set to Common variable immunodeficiency
Review for gene: SOCS1 was set to GREEN
Added comment: 2 unrelated families with truncating variants with supportive immunophenotyping of patient cells, and supporting null mouse models.
Sources: Literature
Mendeliome v0.3581 MRPS23 Zornitza Stark Phenotypes for gene: MRPS23 were changed from Hepatic disease; Combined respiratory chain complex deficienciesHepatic disease; Combined respiratory chain complex deficiencies; Cardiomyopathy; Tubulopathy; Lactic acidosis; Structural brain abnormalities to Hepatic disease; Combined respiratory chain complex deficiencies; Hepatic disease; Combined respiratory chain complex deficiencies; Cardiomyopathy; Tubulopathy; Lactic acidosis; Structural brain abnormalities; Combined oxidative phosphorylation deficiency 45, MIM#618951
Mendeliome v0.3580 MRPS23 Zornitza Stark edited their review of gene: MRPS23: Changed phenotypes: Hepatic disease, Combined respiratory chain complex deficiencies, Cardiomyopathy, Tubulopathy, Lactic acidosis, Structural brain abnormalities, Combined oxidative phosphorylation deficiency 45, MIM#618951
Mendeliome v0.3580 MRPL12 Zornitza Stark Phenotypes for gene: MRPL12 were changed from Growth retardation; neurological deterioration; mitochondrial translation deficiency to Growth retardation; neurological deterioration; mitochondrial translation deficiency; Combined oxidative phosphorylation deficiency 45, MIM#618951
Mendeliome v0.3579 MRPL12 Zornitza Stark edited their review of gene: MRPL12: Changed phenotypes: Growth retardation, neurological deterioration, mitochondrial translation deficiency, Combined oxidative phosphorylation deficiency 45, MIM#618951
Mendeliome v0.3561 OBSCN Paul De Fazio gene: OBSCN was added
gene: OBSCN was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: OBSCN was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: OBSCN were set to 30681346; 26573135; 17716621; 25173926; 28630914
Phenotypes for gene: OBSCN were set to Hypertrophic cardiomyopathy
Review for gene: OBSCN was set to RED
gene: OBSCN was marked as current diagnostic
Added comment: Limited evidence by ClinGen working group.

Via ClinGen: 8 probands in 3 publications but only 3 probands from 1 publication were though to have pathogenic variants (others were excluded based on population frequency and expert review).

No additional case reports were found. A mouse model lends some support to the association of this gene with heart disease although not HCM specifically.
Sources: Literature
Mendeliome v0.3561 KLF10 Paul De Fazio gene: KLF10 was added
gene: KLF10 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KLF10 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: KLF10 were set to 22234868
Phenotypes for gene: KLF10 were set to HCM
gene: KLF10 was marked as current diagnostic
Added comment: Curated by ClinGen and rated as limited evidence.

Misssense mutations reported in six unrelated individuals patients (two males/four females), with family history of HCM only reported for one individual (PMID: 22234868). No further reports in the literature.
Sources: Literature
Mendeliome v0.3487 HDAC8 Zornitza Stark Mode of inheritance for gene: HDAC8 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3486 HDAC8 Zornitza Stark reviewed gene: HDAC8: Rating: GREEN; Mode of pathogenicity: None; Publications: 30614194, 24403048; Phenotypes: Cornelia de Lange syndrome 5, MIM# 300882; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3468 IL6R Zornitza Stark Phenotypes for gene: IL6R were changed from Recurrent pyogenic infections, cold abscesses; High circulating IL-6 levels; High IgE to Recurrent pyogenic infections, cold abscesses; High circulating IL-6 levels; High IgE; IgE recurrent infection syndrome, MIM#618944
Mendeliome v0.3467 IL6R Zornitza Stark edited their review of gene: IL6R: Changed phenotypes: Recurrent pyogenic infections, cold abscesses, High circulating IL-6 levels, High IgE, IgE recurrent infection syndrome, MIM#618944
Mendeliome v0.3454 COG2 Zornitza Stark Phenotypes for gene: COG2 were changed from to Congenital disorder of glycosylation, type IIq (MIM# 617395)
Mendeliome v0.3450 COG2 Ain Roesley reviewed gene: COG2: Rating: RED; Mode of pathogenicity: None; Publications: 24784932; Phenotypes: Congenital disorder of glycosylation, type IIq (MIM# 617395); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3450 DACT1 Natalie Tan gene: DACT1 was added
gene: DACT1 was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: DACT1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DACT1 were set to PMID: 28054444; 22610794; 19701191
Phenotypes for gene: DACT1 were set to ?Townes-Brocks syndrome 2 (OMIM #617466)
Review for gene: DACT1 was set to RED
Added comment: Webb et al. (2017) reported 6 affected members of a 3-generation family with ?Townes-Brocks syndrome-2, identified heterozygosity for a nonsense mutation in the DACT1 gene that segregated with disease. Clinical features include imperforate anus, rectovaginal fistula, crossed fused renal ectopia, vesicoureteral reflux, unilateral microtia, overfolded helices and cupped ears. One family member (proband's mother) with scoliosis and spina bifida occulta. Neural tube defects reported in a study of human fetuses (PMID: 22610794) and a mouse model (PMID: 19701191). Listed in Decipher v10.0 for an individual with abnormalities of (i) head or neck (ii) nervous system (iii) skeletal system. Unlike the gene SALL1 that causes Townes-Brocks syndrome 1, there is no information specifically relating to DACT1 with radial dysplasia, as these were not observed in the family with ?Townes-Brocks syndrome 2 (PMID: 28054444).
Sources: NHS GMS
Mendeliome v0.3438 KIAA0825 Zornitza Stark gene: KIAA0825 was added
gene: KIAA0825 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KIAA0825 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: KIAA0825 were set to 32147526; 30982135
Phenotypes for gene: KIAA0825 were set to Polydactyly, postaxial, type A10, MIM# 618498
Review for gene: KIAA0825 was set to GREEN
Added comment: Three unrelated families reported.
Sources: Literature
Mendeliome v0.3425 NSDHL Zornitza Stark Mode of inheritance for gene: NSDHL was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3413 NSDHL Crystle Lee reviewed gene: NSDHL: Rating: GREEN; Mode of pathogenicity: None; Publications: 15689440; Phenotypes: CHILD syndrome (MMIM#308050); Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3380 DPM1 Zornitza Stark Phenotypes for gene: DPM1 were changed from to Congenital disorder of glycosylation, type Ie, 608799
Mendeliome v0.3377 DPM1 Elena Savva reviewed gene: DPM1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 23856421; Phenotypes: Congenital disorder of glycosylation, type Ie, 608799; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3376 GIPC1 Zornitza Stark gene: GIPC1 was added
gene: GIPC1 was added to Mendeliome. Sources: Literature
5'UTR, STR tags were added to gene: GIPC1.
Mode of inheritance for gene: GIPC1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: GIPC1 were set to 32413282
Phenotypes for gene: GIPC1 were set to Oculopharyngodistal myopathy-2 (OPDM2), MIM#618940
Review for gene: GIPC1 was set to AMBER
Added comment: 19 families reported with heterozygous trinucleotide repeat expansion in the 5-prime untranslated region and onset of distal muscle weakness, mainly of the lower limbs, and/or ophthalmoplegia in the second or third decades of life. Note this is unlikely to be tractable currently by most NGS assays.
Sources: Literature
Mendeliome v0.3327 KIF21B Zornitza Stark gene: KIF21B was added
gene: KIF21B was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: KIF21B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KIF21B were set to 32415109
Phenotypes for gene: KIF21B were set to Global developmental delay; Intellectual disability; Abnormality of brain morphology; Microcephaly
Mode of pathogenicity for gene: KIF21B was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments
Review for gene: KIF21B was set to GREEN
Added comment: Asselin et al (2020 - PMID: 32415109) report on 4 individuals with KIF21B pathogenic variants. DD/ID (borderline intellectual functioning to severe ID) was a feature in all. Variable other findings included brain malformations (CCA) and microcephaly. 3 missense variants and a 4-bp insertion were identified, in 3 cases as de novo events while in a single subject the variant was inherited from the father who was also affected. The authors provide evidence for a role of KIF21B in the regulation of processes involved in cortical development and deleterious effect of the missense variants impeding neuronal migration and kinesin autoinhibition. Phenotypes specific to variants (e.g. CCA or microcephaly) were recapitulated in animal models. Missense variants are thought to exert a gain-of-function effect. As commented on, the 4-bp duplication (/frameshift) variant might not be pathogenic. In blood sample from the respective individual, RT-qPCR analysis suggested that haploinsufficiency (NMD) applies. Although Kif21b haploinsufficiency in mice was shown to lead to impaired neuronal positioning, the gene might partially tolerate LoF variants as also suggested by 28 such variants in gnomAD. Homozygous Kif21b ko mice display severe morphological abnormalities, partial loss of commissural fibers, cognitive deficits and altered synaptic transmission (several refs to previous studies provided by the authors).
Sources: Expert Review
Mendeliome v0.3325 TBC1D2B Zornitza Stark gene: TBC1D2B was added
gene: TBC1D2B was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: TBC1D2B was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TBC1D2B were set to 32623794
Phenotypes for gene: TBC1D2B were set to Global developmental delay; Intellectual disability; Seizures; Gingival overgrowth; Behavioral abnormality; Abnormality of the mandible; Abnormality of brain morphology; Abnormality of the eye; Hearing abnormality
Review for gene: TBC1D2B was set to GREEN
Added comment: Harms et al (2020 - PMID: 32623794) report on 3 unrelated individuals with biallelic pLoF TBC1D2B variants. Features included cognitive impairment (mild ID in one case, regression at the age of 12y in another, hypotonia and delayed milestones in a third aged 8m), seizures (3/3 - variable age of onset) and/or gingival overgrowth (2/3 - prior to initiation of AEDs). Other findings included behavioral abnormalities, mandibular anomalies, abnormal brain imaging and ophthalmologic or (rarely) audiometric evaluations. All were born to non-consanguineous couples and additional investigations were performed in some. Variants were identified by WES or trio WGS, with Sanger confirmation/compatible segregation analyses. In line with the pLoF variants, mRNA studies in fibroblasts from 2 unrelated affected individuals demonstrated significantly reduced (~80-90%) TBC1C2D mRNA levels compared to controls, restored following cycloheximide treatment. Protein was absent in patient fibroblasts. TBC-domain containing GTPase activating proteins are known as key regulators of RAB GTPase activity. TBC1D2B was shown to colocalize with RAB5-positive endocytic vesicles. CRISPR/Cas9-mediated ko of TBC1D2B in HeLa cells suggested a role in EGF receptor endocytosis and decreased cell viability of TBC1D2B-deficient HeLa cells upon serum deprivation. Genes encoding other TBC domain-containg GTPase-activating proteins, e.g. TBC1D7 and TBC1D20, TBC1D24 are associated with recessive neurodevelopmental disorders (with ID and/or seizures) and the pathophysiological defect in TBC1D2B-related disorder (deficit in vesicle trafficking and/or cell survival) is proposed to be similar to that of TBC1D24.
Sources: Expert Review
Mendeliome v0.3323 EXOC2 Zornitza Stark gene: EXOC2 was added
gene: EXOC2 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: EXOC2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EXOC2 were set to 32639540
Phenotypes for gene: EXOC2 were set to Global developmental delay; Intellectual disability; Abnormality of the face; Abnormality of brain morphology
Review for gene: EXOC2 was set to AMBER
Added comment: Van Bergen et al (2020 - PMID: 32639540) report on 3 individuals from 2 families, harboring biallelic EXOC2 mutations. Clinical presentation included DD, ID (severe in 2 subjects from fam1, borderline intellectual functioning in fam2), dysmorphic features and brain abnormalities. Cerebellar anomalies were common to all with a molar tooth sign observed in one (1/3). Other findings limited to subjects from one family included acquired microcephaly, congenital contractures, spastic quadriplegia (each observed 2/3). Previous investigations were in all cases non-diagnostic. WES identified biallelic EXOC2 mutations in all affected individuals. EXOC2 encodes an exocyst subunit. The latter is an octameric complex, component of the membrane transport machinery, required for tethering and fusion of vesicles at the plasma membrane. As discussed ,vesicle transport is important for the development of brain and the function of neurons and glia. Exocyst function is also important for delivery of Arl13b to the primary cilium (biallelic ARL13B mutations cause Joubert syndrome 8) and ciliogenesis. Affected subjects from a broader consanguineous family (fam1) were homozygous for a truncating variant. Fibroblast studies revealed mRNA levels compatible with NMD (further restored in presence of CHX) as well as reduced protein levels. The female belonging to the second non-consanguineous family was found to harbor 2 missense variants in trans configuration. An exocytosis defect was demonstrated in fibroblasts from individuals belonging to both families. Ciliogenesis appeared to be normal, however Arl13b localization/recruitment to the cilia was reduced compared with control cells with the defect rescued upon exogenous expression of wt EXOC2. Mutations in other genes encoding components of the exocyst complex have been previously reported in individuals with relevant phenotypes (e.g. EXOC8 in a boy with features of Joubert s. or EXOC4 in nephrotic syndrome). The authors discuss on the essential role of EXOC2 based on model organism studies (e.g. impaired neuronal membrane traffic, failure of neuronal polarization and neuromuscular junction expansion seen in Drosophila Sec5 (EXOC2) null mutants).
Sources: Expert Review
Mendeliome v0.3321 CCDC174 Zornitza Stark gene: CCDC174 was added
gene: CCDC174 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: CCDC174 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CCDC174 were set to 26358778
Phenotypes for gene: CCDC174 were set to Hypotonia, infantile, with psychomotor retardation - IHPMR, 616816
Review for gene: CCDC174 was set to AMBER
Added comment: Biallelic pathogenic CCDC174 variants cause Hypotonia, infantile, with psychomotor retardation - IHPMR (MIM 616816). Volodarsky et al [2015 - PMID: 26358778] describe 6 children from 2 unrelated families with - among others - severe hypotonia, psychomotor delay and abducens nerve palsy. All affected subjects were homozygous for a stoploss variant. Evidence from functional studies/animal model is provided supporting the role of the gene in this phenotype. Overall this gene can be considered for inclusion in the ID panel with amber rating (2 families, single founder variant, consistent phenotype, supportive studies) pending further reports.
Sources: Expert Review
Mendeliome v0.3318 ABCA2 Zornitza Stark gene: ABCA2 was added
gene: ABCA2 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: ABCA2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ABCA2 were set to 30237576; 29302074; 31047799
Phenotypes for gene: ABCA2 were set to Intellectual developmental disorder with poor growth and with or without seizures or ataxia, 618808
Review for gene: ABCA2 was set to GREEN
Added comment: Biallelic pathogenic ABCA2 variants cause Intellectual developmental disorder with poor growth and with or without seizures or ataxia (MIM 618808). There are 3 relevant publications (01-07-2020) : - Maddirevula et al [2019 - PMID: 30237576] described briefly 2 unrelated subjects (16-2987, 16DG0071) both DD and seizures among other manifestations. - Hu et al [2019 - PMID: 29302074] reported 3 sibs (M8600615 - III:1-3) born to consanguineous parents (M8600615 - III:1-3) with DD/ID (formal confirmation of moderate ID, in those (2) evaluated). One also presented with seizures. - Aslam and Naz [2019 - PMID: 31047799] provided clinical details on 2 siblings born to consanguineous parents. ID was reported for the older sib but was absent in the younger one. Seizures were not part of the phenotype. All subjects harbored biallelic pLoF variants. N.B. : Steinberg et al [2015 - PMID: 25773295], within a cohort of patients with ALS, identified one with biallelic ABCA2 variants. As however Aslam and Naz comment, this person harbored a single pathogenic variant, with a second one rather unlikely to be pathogenic due to high allele frequency. Overall this gene can be considered for inclusion with green rating in both ID and epilepsy panels (each in >=3 unrelated individuals).
Sources: Expert Review
Mendeliome v0.3308 SGMS2 Bryony Thompson gene: SGMS2 was added
gene: SGMS2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SGMS2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SGMS2 were set to 30779713; 32028018
Phenotypes for gene: SGMS2 were set to Calvarial doughnut lesions with bone fragility with or without spondylometaphyseal dysplasia MIM#126550
Review for gene: SGMS2 was set to GREEN
Added comment: 12 patients from 6 unrelated families with the same stopgain variant (p.Arg50*), with osteoporosis that resembles osteogenesis imperfecta. In vitro over-expression assays of the variant demonstrate protein that was completely mislocalized in the cytosolic and nuclear compartments. 2 unrelated families were heterozygous for 2 missense (p.Ile62Ser, p.Met64Arg) with bone fragility and severe short stature, and spondylometaphyseal dysplasia. In vitro assays of each variant demonstrated an enhanced rate of de novo sphingomyelin production by blocking export of a functional enzyme from the endoplasmic reticulum.
Sources: Expert list
Mendeliome v0.3295 DPM2 Zornitza Stark Phenotypes for gene: DPM2 were changed from to Congenital disorder of glycosylation, type Iu, MIM# 615042
Mendeliome v0.3291 DPM2 Zornitza Stark reviewed gene: DPM2: Rating: AMBER; Mode of pathogenicity: None; Publications: 23109149; Phenotypes: Congenital disorder of glycosylation, type Iu, MIM# 615042; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3284 MRPS34 Zornitza Stark reviewed gene: MRPS34: Rating: GREEN; Mode of pathogenicity: None; Publications: 28777931; Phenotypes: Combined oxidative phosphorylation deficiency 32, MIM# 617664; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3284 MRPS34 Zornitza Stark Phenotypes for gene: MRPS34 were changed from to Combined oxidative phosphorylation deficiency 32, 61766
Mendeliome v0.3281 MRPS34 Elena Savva reviewed gene: MRPS34: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 28777931; Phenotypes: Combined oxidative phosphorylation deficiency 32, 61766; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3271 MTMR14 Zornitza Stark Added comment: Comment when marking as ready: Single family and animal models; postulated to be a modifier in the other family.
Mendeliome v0.3270 MTMR14 Zornitza Stark Added comment: Comment when marking as ready: Postulated to be a modifier.
Mendeliome v0.3266 GGPS1 Zornitza Stark gene: GGPS1 was added
gene: GGPS1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GGPS1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GGPS1 were set to 32403198
Phenotypes for gene: GGPS1 were set to Muscular dystrophy; Deafness; Ovarian insufficiency
Review for gene: GGPS1 was set to GREEN
Added comment: 11 individuals from 6 unrelated families reported. In addition to proximal weakness, all but one patient presented with congenital sensorineural hearing loss, and all postpubertal females had primary ovarian insufficiency. Muscle histology was dystrophic, with ultrastructural evidence of autophagic material and large mitochondria in the most severe cases. Knock-in mouse of one of the mutations (Y259C) resulted in prenatal lethality.
Sources: Literature
Mendeliome v0.3264 DNMBP Seb Lunke gene: DNMBP was added
gene: DNMBP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DNMBP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DNMBP were set to 30290152
Phenotypes for gene: DNMBP were set to congenital cataract
Review for gene: DNMBP was set to GREEN
gene: DNMBP was marked as current diagnostic
Added comment: Multiple individuals from three independent large consanguineous families with bilateral infantile cataracts. Seperate hom nonsense variants.
Sources: Literature
Mendeliome v0.3263 CRYGA Zornitza Stark gene: CRYGA was added
gene: CRYGA was added to Mendeliome. Sources: Expert list
refuted tags were added to gene: CRYGA.
Mode of inheritance for gene: CRYGA was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CRYGA were set to 30450742; 28839118
Phenotypes for gene: CRYGA were set to Cataract
Review for gene: CRYGA was set to RED
Added comment: Reported as potentially disease causing in multiple individuals from two seperate families, but in both cases variant is present in the general population (20 Hets for one variant, >1000 hets and 9 homs in other variant)
Sources: Expert list
Mendeliome v0.3261 ADAMTSL4 Zornitza Stark Phenotypes for gene: ADAMTSL4 were changed from to Ectopia lentis, isolated, autosomal recessive, MIM# 225100
Mendeliome v0.3258 ADAMTSL4 Zornitza Stark reviewed gene: ADAMTSL4: Rating: GREEN; Mode of pathogenicity: None; Publications: 19200529, 20564469, 20141359, 21051722; Phenotypes: Ectopia lentis, isolated, autosomal recessive, MIM# 225100; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3250 CFAP74 Zornitza Stark gene: CFAP74 was added
gene: CFAP74 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CFAP74 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CFAP74 were set to 32555313
Phenotypes for gene: CFAP74 were set to Primary ciliary dyskinesia; infertility
Review for gene: CFAP74 was set to AMBER
Added comment: Two unrelated individuals with compound het missense variants reported.
Sources: Literature
Mendeliome v0.3248 ASPRV1 Ee Ming Wong gene: ASPRV1 was added
gene: ASPRV1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ASPRV1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ASPRV1 were set to PMID: 32516568
Phenotypes for gene: ASPRV1 were set to palmoplantar keratoderma; lamellar ichthyosis
Review for gene: ASPRV1 was set to GREEN
gene: ASPRV1 was marked as current diagnostic
Added comment: -3 heterozygous missense variants identified across 4 unrelated kindreds
-mutant ASPRV1 expressed in human keratinocytes suggests impaired filaggrin processing
Sources: Literature
Mendeliome v0.3242 SREBF1 Paul De Fazio gene: SREBF1 was added
gene: SREBF1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SREBF1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: SREBF1 were set to 32497488
Phenotypes for gene: SREBF1 were set to IFAP (ichthyosis follicularis, atrichia, and photophobia) syndrome
Review for gene: SREBF1 was set to GREEN
gene: SREBF1 was marked as current diagnostic
Added comment: 11 unrelated, ethnically diverse individuals with autosomal-dominant IFAP syndrome. 3 different msisense variants identified affecting the same region (residues 527, 528, and 530). Functional studies support impaired function (impaired nuclear translocation of the transcriptionally active form of SREBP1 resulting in lower expression of the SREBP1 variants). Increased keratinocyte apoptosis was observed in patient scalp samples.
Sources: Literature
Mendeliome v0.3231 ADPRHL2 Zornitza Stark changed review comment from: Ataxia is part of the phenotype.
Sources: Expert list; to: 14 families reported, onset is in the first years of life following normal early development. Patients have cyclic episodic deterioration in response to stress, such as infection or febrile illness. The severity is highly variable: some patients develop seizures early in life that are associated with loss of developmental milestones and early sudden death in childhood, whereas others present at a later age with muscle weakness, gait ataxia, impaired speech, more subtle clinical deterioration, and cognitive decline. Neurologic involvement includes gait ataxia, cerebellar signs associated with cerebellar atrophy, generalized brain atrophy, impaired intellectual development, hearing loss, and peripheral neuropathy.
Sources: Expert list
Mendeliome v0.3230 GPR161 Zornitza Stark gene: GPR161 was added
gene: GPR161 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GPR161 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: GPR161 were set to 31609649
Phenotypes for gene: GPR161 were set to Predisposition to paediatric medulloblastoma
Review for gene: GPR161 was set to GREEN
Added comment: 6 unrelated individuals reported with germline variants, 5 with truncating, one missense. Somatic second hit in tumour tissue.
Sources: Literature
Mendeliome v0.3229 SETD1B Zornitza Stark Phenotypes for gene: SETD1B were changed from to Epilepsy with myoclonic absences; intellectual disability; SETD1B-related neurodevelopmental disorder
Mendeliome v0.3226 SETD1B Zornitza Stark reviewed gene: SETD1B: Rating: GREEN; Mode of pathogenicity: None; Publications: 32546566, 29322246, 31440728, 31685013; Phenotypes: Epilepsy with myoclonic absences, intellectual disability, SETD1B-related neurodevelopmental disorder; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.3225 ARF1 Zornitza Stark gene: ARF1 was added
gene: ARF1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ARF1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ARF1 were set to 28868155
Phenotypes for gene: ARF1 were set to Periventricular nodular heterotopia 8, MIM# 618185
Review for gene: ARF1 was set to GREEN
Added comment: Three unrelated individuals reported with de novo missense in this gene.
Sources: Expert list
Mendeliome v0.3222 MRAS Zornitza Stark changed review comment from: Two unrelated individuals reported with de novo variants in this gene. Rated as LIMITED by ClinGen.
Sources: Expert list; to: Two unrelated individuals reported with de novo variants in this gene initially. Rated as LIMITED by ClinGen in 2018. Note 4 further individuals reported since.
Sources: Expert list
Mendeliome v0.3222 MRAS Zornitza Stark gene: MRAS was added
gene: MRAS was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MRAS was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MRAS were set to 28289718
Phenotypes for gene: MRAS were set to Noonan syndrome
Review for gene: MRAS was set to AMBER
Added comment: Two unrelated individuals reported with de novo variants in this gene. Rated as LIMITED by ClinGen.
Sources: Expert list
Mendeliome v0.3211 CCDC32 Zornitza Stark Added comment: Comment when marking as ready: Three affected individuals from two unrelated families, supportive animal model and other functional data consistent with this being a ciliopathy.
Mendeliome v0.3202 CAPZA2 Eleanor Williams gene: CAPZA2 was added
gene: CAPZA2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CAPZA2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: CAPZA2 were set to 32338762
Phenotypes for gene: CAPZA2 were set to intellectual disability
Review for gene: CAPZA2 was set to AMBER
Added comment: PMID: 32338762 - Huang et al 2020 - report 2 unrelated families (Chinese and European) in which a de novo heterozygous variant has been identified in CAPZA2 in paediatric probands that present with global motor development delay, speech delay, intellectual disability, hypotonia. One proband had seizures at 7 months but these were controlled with medication and did not repeat. The other proband at age one had an atypical febrile seizure that was controlled without medication. Functional studies in Drosophila suggest that these variants are mild loss of function mutations but that they can act as dominant negative variants in actin polymerization in bristles.
Sources: Literature
Mendeliome v0.3202 CCDC32 Eleanor Williams gene: CCDC32 was added
gene: CCDC32 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CCDC32 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CCDC32 were set to 32307552
Phenotypes for gene: CCDC32 were set to craniofacial, cardiac and neurodevelopmental anomalies
Review for gene: CCDC32 was set to AMBER
Added comment: PMID: 32307552 - Harel et al 2020 - reports 2 unrelated consanguineous families with probands with homozygous frameshift variants in CCDC32. Parents are heterozygous. Phenotype is a congenital syndrome characterized by craniofacial, cardiac and neurodevelopmental anomalies. Functional studies in zebrafish show that ccdc32 depletion impairs cilia formation and shows a role for ccdc32 in craniofacial, brain and left/right axis development.
Sources: Literature
Mendeliome v0.3196 EXOC7 Zornitza Stark gene: EXOC7 was added
gene: EXOC7 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EXOC7 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EXOC7 were set to 32103185
Phenotypes for gene: EXOC7 were set to brain atrophy; seizures; developmental delay; microcephaly
Review for gene: EXOC7 was set to GREEN
Added comment: 4 families with 8 affected individuals with brain atrophy, seizures, and developmental delay, and in more severe cases microcephaly and infantile death. Four novel homozygous or comp.heterozygous variants found in EXOC7, which segregated with disease in the families. They showed that EXOC7, a member of the mammalian exocyst complex, is highly expressed in developing human cortex. In addition, a zebrafish model of Exoc7 deficiency recapitulates the human disorder with increased apoptosis and decreased progenitor cells during telencephalon development, suggesting that the brain atrophy in human cases reflects neuronal degeneration.
Sources: Literature
Mendeliome v0.3195 HNRNPH1 Zornitza Stark gene: HNRNPH1 was added
gene: HNRNPH1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: HNRNPH1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: HNRNPH1 were set to 32335897; 29938792
Phenotypes for gene: HNRNPH1 were set to HNRNPH1‐related syndromic intellectual disability
Review for gene: HNRNPH1 was set to GREEN
Added comment: 1st patient reported in 2018 with intellectual disability and dysmorphic features and HNRNPH1 heterozygous missense variant. 2020 paper reports additional 7 cases with ID, short stature, microcephaly, distinctive dysmorphic facial features, and congenital anomalies (cranial, brain, genitourinary, palate, ophthalmologic). They all had HNRNPH1 heterozygous pathogenic variants (missense, frameshift, in‐frame deletion, entire gene duplication) and were identified using clinical networks and GeneMatcher. No comments in paper if all de novo.
Sources: Literature
Mendeliome v0.3189 EMILIN1 Naomi Baker changed review comment from: Missense mutations identified in two families. First family, proband presented with ascending and descending aortic aneurysms, bilateral lower leg and foot sensorimotor peripheral neuropathy, arthropathy, and increased skin elasticity. Variant segregated with disease in the affected proband, mother, and son. Second family, father and three affected children showed amyotrophy and weakness of the distal lower limbs, dating back to early childhood. Some functional studies performed in patient fibroblasts and zebrafish, however these were not conclusive as the two missense mutations are at different locations within the protein.
Sources: Literature; to: Missense mutations identified in two families. First family, proband presented with ascending and descending aortic aneurysms, bilateral lower leg and foot sensorimotor peripheral neuropathy, arthropathy, and increased skin elasticity. Variant segregated with disease in the affected proband, mother, and son. Second family, father and three affected children showed amyotrophy and weakness of the distal lower limbs, dating back to early childhood. Some functional studies performed in patient fibroblasts and zebrafish, however these were not conclusive as the two missense mutations are at different locations within the protein.
Sources: Literature
Mendeliome v0.3189 EMILIN1 Naomi Baker gene: EMILIN1 was added
gene: EMILIN1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EMILIN1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: EMILIN1 were set to PMID: 31978608; 26462740.
Phenotypes for gene: EMILIN1 were set to peripheral neuropathy
Penetrance for gene: EMILIN1 were set to unknown
Review for gene: EMILIN1 was set to AMBER
Added comment: Missense mutations identified in two families. First family, proband presented with ascending and descending aortic aneurysms, bilateral lower leg and foot sensorimotor peripheral neuropathy, arthropathy, and increased skin elasticity. Variant segregated with disease in the affected proband, mother, and son. Second family, father and three affected children showed amyotrophy and weakness of the distal lower limbs, dating back to early childhood. Some functional studies performed in patient fibroblasts and zebrafish, however these were not conclusive as the two missense mutations are at different locations within the protein.
Sources: Literature
Mendeliome v0.3182 CACNB1 Zornitza Stark gene: CACNB1 was added
gene: CACNB1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: CACNB1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CACNB1 were set to 27832566; 8943043; 29212769
Phenotypes for gene: CACNB1 were set to Malignant hyperthermia susceptibility
Added comment: A single heterozygous case with a positive IVCT muscle biopsy has been reported with p.Val156Ala. The European non-Finnish allele frequency in gnomAD v2.1 is 0.001146 (148/129,118 alleles), which is higher than the expected population frequency for dominantly inherited malignant hyperthermia (0.1%). Additionally, functional assays of this variant, suggest it would only significantly affect function in the homozygous state (suggesting a recessive condition).
Sources: Expert list
Mendeliome v0.3156 AXL Bryony Thompson gene: AXL was added
gene: AXL was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: AXL was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: AXL were set to 18787040; 24476074
Phenotypes for gene: AXL were set to Kallman syndrome; normosmic idiopathic hypogonadotropic hypogonadism
Review for gene: AXL was set to AMBER
Added comment: Axl null mice had delayed first oestrus and persistently abnormal oestrous cyclicality compared with wild-type controls. Only a single study reported screening human cases. In a screen of 104 probands with KS or nIHH, four heterozygous AXL mutations were identified in two KS and two nIHH unrelated subjects (two males and two females). Three of the variants appear to be too common in gnomAD v2.1 given the reported prevalence of KS reported in GeneReviews (1:30,000 in males and 1:125,000 in females): c.587-6C>T (normal splicing in RNA studies, NFE AF 0.0001472), p.Q361P (NFE 0.002560), p.L50F (AJ 0.004405). The other variant p.S202C (4 hets, 1 female in gnomAD v2.1) is rare enough in gnomAD for a dominant disorder. In vitro functional assays were conducted and p.S202C had an significant effect on function, but so did the more common variant p.Q361P.
Sources: Literature
Mendeliome v0.3150 GOLGA2 Elena Savva gene: GOLGA2 was added
gene: GOLGA2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: GOLGA2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GOLGA2 were set to PMID: 30237576; 26742501
Phenotypes for gene: GOLGA2 were set to Nueromuscular disorder
Review for gene: GOLGA2 was set to GREEN
Added comment: PMID: 30237576 - One 11 year old patient with a homozygous PTC.
Patient had global dev delay, microcephaly, distal muscle weakness with joint contractures and elevated CK levels. Muscle biopsy showed dystrophin changes. MRI at 2 years old showed brain atrophy with thin corpus callosum and hypomyelination. No seizures or regression.

PMID: 26742501 - One infant with a homozygous PTC.
Patient had dev delay, seizures, microcephaly and muscular dystrophy. Zebrafish null model recapitulates the human phenotype with microcephaly and skeletal muscle disorganization.

Summary: 2 patients + animal model
Sources: Expert list
Mendeliome v0.3141 SORD Zornitza Stark Phenotypes for gene: SORD were changed from isolated hereditary neuropathy to isolated hereditary neuropathy; Sorbitol dehydrogenase deficiency with peripheral neuropathy (SORDDPN), MIM#618912
Mendeliome v0.3140 ANKRD1 Zornitza Stark Phenotypes for gene: ANKRD1 were changed from to Hypertrophic cardiomyopathy; Dilated cardiomyopathy
Mendeliome v0.3136 ANKRD1 Zornitza Stark reviewed gene: ANKRD1: Rating: RED; Mode of pathogenicity: None; Publications: 19608030, 19525294, 30681346; Phenotypes: Hypertrophic cardiomyopathy, Dilated cardiomyopathy; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.3125 FITM2 Bryony Thompson gene: FITM2 was added
gene: FITM2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: FITM2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FITM2 were set to 28067622; 30214770; 30288795
Phenotypes for gene: FITM2 were set to Siddiqi syndrome MIM#618635; dystonia; deafness
Review for gene: FITM2 was set to GREEN
Added comment: 7 cases from 3 unrelated families (2 consanguineous) with a dystonia-deafness syndrome and a supporting Drosophila model.
Sources: Expert list
Mendeliome v0.3117 NEXMIF Zornitza Stark Mode of inheritance for gene: NEXMIF was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3112 KDM6A Zornitza Stark Mode of inheritance for gene: KDM6A was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3111 KDM6A Elena Savva reviewed gene: KDM6A: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID:27302555, 24664873; Phenotypes: Kabuki syndrome 2, 300867; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.3111 NEXMIF Elena Savva reviewed gene: NEXMIF: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 27358180; Phenotypes: Mental retardation, X-linked 98 300912; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.3110 STAG3 Bryony Thompson gene: STAG3 was added
gene: STAG3 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: STAG3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: STAG3 were set to 24597867; 26059840; 31803224; 31363903
Phenotypes for gene: STAG3 were set to Premature ovarian failure 8 MIM#615723
Review for gene: STAG3 was set to GREEN
Added comment: At least four unrelated families with ovarian failure and a supporting null mouse model.
Sources: Expert list
Mendeliome v0.3108 SOHLH1 Bryony Thompson gene: SOHLH1 was added
gene: SOHLH1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SOHLH1 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: SOHLH1 were set to 25774885; 16690745; 31042289; 20506135; 28718531
Phenotypes for gene: SOHLH1 were set to Ovarian dysgenesis 5 MIM#617690; Spermatogenic failure 32 MIM#618115
Review for gene: SOHLH1 was set to GREEN
Added comment: Women in 3 unrelated families with ovarian dysgenesis and homozygous variants, and a supporting null mouse model.
At least 4 males with heterozygous variants and spermatogenic failure.
Sources: Expert list
Mendeliome v0.3106 HFM1 Bryony Thompson gene: HFM1 was added
gene: HFM1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: HFM1 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: HFM1 were set to 23555294; 24597873; 31279343
Phenotypes for gene: HFM1 were set to Premature ovarian failure 9 MIM#615724
Review for gene: HFM1 was set to GREEN
Added comment: Three cases from 2 unrelated families with compound heterozygous variants, and a single family with a heterozygous variant have been reported with ovarian failure. There is also a supporting null mouse model.
Sources: Expert list
Mendeliome v0.3094 AMPD1 Zornitza Stark Phenotypes for gene: AMPD1 were changed from to Myopathy due to myoadenylate deaminase deficiency (MIM#615511)
Mendeliome v0.3090 AMPD1 Zornitza Stark reviewed gene: AMPD1: Rating: RED; Mode of pathogenicity: None; Publications: 21343608, 27296017; Phenotypes: Myopathy due to myoadenylate deaminase deficiency (MIM#615511); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3084 PMP2 Bryony Thompson gene: PMP2 was added
gene: PMP2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PMP2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PMP2 were set to 26257172; 26828946; 27009151
Phenotypes for gene: PMP2 were set to Charcot-Marie-Tooth disease, demyelinating, type 1G MIM#618279
Review for gene: PMP2 was set to GREEN
Added comment: 4 unrelated families reported with missense variants, with supporting transgenic mouse and null zebrafish models.
Sources: Expert list
Mendeliome v0.3081 HPRT1 Ain Roesley reviewed gene: HPRT1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 20176575; Phenotypes: HPRT-related gout (MIM# 300323), Lesch-Nyhan syndrome (MIM# 300322); Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Mendeliome v0.3074 ADGRG1 Elena Savva reviewed gene: ADGRG1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 24531968; Phenotypes: Polymicrogyria, bilateral frontoparietal 606854, Polymicrogyria, bilateral perisylvian 615752; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3044 EWSR1 Seb Lunke Phenotypes for gene: EWSR1 were changed from to Amyotrophic lateral sclerosis
Mendeliome v0.3040 EWSR1 Seb Lunke reviewed gene: EWSR1: Rating: AMBER; Mode of pathogenicity: None; Publications: 29731676, 22454397; Phenotypes: Amyotrophic lateral sclerosis; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.3040 TRPM7 Zornitza Stark Phenotypes for gene: TRPM7 were changed from to {Amyotrophic lateral sclerosis-parkinsonism/dementia complex, susceptibility to}, MIM# 105500
Mendeliome v0.3038 TRPM7 Zornitza Stark reviewed gene: TRPM7: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: {Amyotrophic lateral sclerosis-parkinsonism/dementia complex, susceptibility to}, MIM# 105500; Mode of inheritance: None
Mendeliome v0.3028 NUP88 Zornitza Stark gene: NUP88 was added
gene: NUP88 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NUP88 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NUP88 were set to 30543681
Phenotypes for gene: NUP88 were set to Fetal akinesia deformation sequence 4, MIM# 618393
Review for gene: NUP88 was set to GREEN
Added comment: Two unrelated families, functional data on the variants support pathogenicity as does a zebrafish model.
Sources: Literature
Mendeliome v0.3013 LEF1 Zornitza Stark gene: LEF1 was added
gene: LEF1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LEF1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: LEF1 were set to 32022899
Phenotypes for gene: LEF1 were set to Ectodermal dysplasia, no OMIM# yet
Review for gene: LEF1 was set to RED
Added comment: In mice, targeted inactivation of the LEF1 gene results in a complete block of development of multiple ectodermal appendages. One report of two unrelated patients with 4q25 de novo deletion encompassing LEF1 , associated with severe oligodontia of primary and permanent dentition, hypotrichosis and hypohidrosis compatible with hypohidrotic ectodermal dysplasia. So far, no pathogenic variants or variations involving the LEF1 gene have been reported in human.
Sources: Literature
Mendeliome v0.3002 COG4 Zornitza Stark Phenotypes for gene: COG4 were changed from to Saul-Wilson syndrome, OMIM #618150; Congenital disorder of glycosylation, type IIj, OMIM #613489
Mendeliome v0.2999 COG4 Zornitza Stark reviewed gene: COG4: Rating: GREEN; Mode of pathogenicity: None; Publications: 31949312, 30290151, 19494034, 21185756; Phenotypes: Saul-Wilson syndrome, OMIM #618150, Congenital disorder of glycosylation, type IIj, OMIM #613489; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.2970 EFEMP1 Zornitza Stark Phenotypes for gene: EFEMP1 were changed from to Doyne honeycomb degeneration of retina, MIM# 126600; EFEMP1-related connective tissue disorder
Mendeliome v0.2966 EFEMP1 Zornitza Stark reviewed gene: EFEMP1: Rating: GREEN; Mode of pathogenicity: None; Publications: 32006683, 31792352; Phenotypes: Doyne honeycomb degeneration of retina, MIM# 126600, EFEMP1-related connective tissue disorder; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.2959 SCYL2 Zornitza Stark gene: SCYL2 was added
gene: SCYL2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SCYL2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SCYL2 were set to 31960134; 26203146
Phenotypes for gene: SCYL2 were set to Arthrogryposis multiplex congenita (AMC); Zain syndrome
Review for gene: SCYL2 was set to AMBER
Added comment: Two unrelated families reported with AMC, variable other features including microcephaly.
Sources: Literature
Mendeliome v0.2956 RIMS2 Paul De Fazio changed review comment from: Biallelic LoF variants segregate with Syndromic Congenital Cone-Rod Synaptic Disease in 7 individuals across 4 families. Some functional studies related to insulin secretion but they are non-significant.
Sources: Literature; to: Biallelic LoF variants segregate with Syndromic Congenital Cone-Rod Synaptic Disease in 7 individuals across 4 families. Some functional studies related to insulin secretion but they are non-significant. Several individuals had autism. One had night blindness.
Sources: Literature
Mendeliome v0.2943 SPATA13 Ain Roesley changed review comment from: PMID: 32339198; 10 unrelated probands with missense except for 2 families with inframe del of 9bp.
Sources: Literature; to: PMID: 32339198; 10 unrelated probands with missense except for 2 families with inframe del of 9bp.
Sources: Literature
Mendeliome v0.2943 SPATA13 Ain Roesley gene: SPATA13 was added
gene: SPATA13 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SPATA13 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SPATA13 were set to PMID: 32339198
Phenotypes for gene: SPATA13 were set to primary angle-closure glaucoma
Added comment: PMID: 32339198; 10 unrelated probands with missense except for 2 families with inframe del of 9bp.
Sources: Literature
Mendeliome v0.2943 RIMS2 Paul De Fazio changed review comment from: Segregates with Syndromic Congenital Cone-Rod Synaptic Disease in 7 individuals across 4 families. Some functional studies related to insulin secretion but they are non-significant.
Sources: Literature; to: Biallelic LoF variants segregate with Syndromic Congenital Cone-Rod Synaptic Disease in 7 individuals across 4 families. Some functional studies related to insulin secretion but they are non-significant.
Sources: Literature
Mendeliome v0.2943 TRIM71 Elena Savva gene: TRIM71 was added
gene: TRIM71 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TRIM71 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: TRIM71 were set to PMID: 29983323; 32168371; 30975633
Phenotypes for gene: TRIM71 were set to Hydrocephalus, congenital communicating, 1 618667
Mode of pathogenicity for gene: TRIM71 was set to Other
Added comment: PMID: 29983323 - 3 unrelated patients with de novo missense and hydrocephalus with ventriculomegaly (p.Arg608His recurrent). One patient then transmitted the variant to an affected child.

PMID: 32168371 - refers to the gene as an established sources of neurodevelopmental disorder

PMID: 30975633 - identifies and proves by functional studies that TRIM71 is essential for neurodevelopment. Proposes a LOF mechanism.
Sources: Literature
Mendeliome v0.2943 RIMS2 Paul De Fazio gene: RIMS2 was added
gene: RIMS2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RIMS2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RIMS2 were set to 32470375
Review for gene: RIMS2 was set to GREEN
Added comment: Segregates with Syndromic Congenital Cone-Rod Synaptic Disease in 7 individuals across 4 families. Some functional studies related to insulin secretion but they are non-significant.
Sources: Literature
Mendeliome v0.2940 SORD Seb Lunke gene: SORD was added
gene: SORD was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SORD was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SORD were set to 32367058
Phenotypes for gene: SORD were set to isolated hereditary neuropathy
Review for gene: SORD was set to GREEN
gene: SORD was marked as current diagnostic
Added comment: 45 individuals from 38 families across multiple ancestries carrying the nonsense c.757delG
(p.Ala253GlnfsTer27) variant in SORD, in either a homozygous or compound heterozygous state
Sources: Literature
Mendeliome v0.2889 ARL3 Bryony Thompson gene: ARL3 was added
gene: ARL3 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ARL3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: ARL3 were set to 30269812; 16565502; 26964041; 30932721
Phenotypes for gene: ARL3 were set to Joubert syndrome 35 MIM#618161; Retinitis pigmentosa 83 MIM#618173
Review for gene: ARL3 was set to GREEN
Added comment: 4 patients from 2 unrelated consanguineous families with a phenotype resembling Joubert syndrome with homozygous missense mutations affecting the same residue (R149C, R149H), and supporting in vitro functional assays. All reported cases had rod-cone dystrophy. An Arl3 null mouse model has a ciliary disease phenotype affecting the kidney, biliary tract, pancreas, and retina.
Two unrelated families with retinitis pigmentosa segregating the same heterozygous missense variant (Y90C).
Sources: Expert list
Mendeliome v0.2882 CEP19 Bryony Thompson gene: CEP19 was added
gene: CEP19 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CEP19 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CEP19 were set to 29127258; 24268657
Phenotypes for gene: CEP19 were set to Morbid obesity and spermatogenic failure MIM#615703
Review for gene: CEP19 was set to AMBER
Added comment: A consanguineous Arab family with morbid obesity and infertility with a homozygous predicted null variant, and a mouse model that recapitulates the phenotype. Another homozygous variant has been identified in a consanguineous Bardet Beidl syndrome.
Sources: Literature
Mendeliome v0.2879 GDF3 Zornitza Stark Phenotypes for gene: GDF3 were changed from to Microphthalmia with coloboma 6, MIM# 613703; Microphthalmia, isolated 7, MIM# 613704
Mendeliome v0.2876 GDF3 Zornitza Stark reviewed gene: GDF3: Rating: RED; Mode of pathogenicity: None; Publications: 19864492; Phenotypes: Microphthalmia with coloboma 6 613703, Microphthalmia, isolated 7 613704; Mode of inheritance: None
Mendeliome v0.2867 DHX30 Zornitza Stark Added comment: Comment when marking as ready: Twelve unrelated individuals reported with de novo missense variants, some recurrent.
Mendeliome v0.2853 TRIP12 Zornitza Stark commented on gene: TRIP12: At least 10 unrelated patients reported with ID with or without autism (PMIDs: 27848077, 28251352).
Mendeliome v0.2850 CX3CR1 Zornitza Stark Phenotypes for gene: CX3CR1 were changed from to Coronary artery disease, resistance to}, MIM# 607339; {Macular degeneration, age-related, 12} 613784; {Rapid progression to AIDS from HIV1 infection} 609423
Mendeliome v0.2848 CX3CR1 Zornitza Stark reviewed gene: CX3CR1: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: Coronary artery disease, resistance to}, MIM# 607339, {Macular degeneration, age-related, 12} 613784, {Rapid progression to AIDS from HIV1 infection} 609423; Mode of inheritance: None
Mendeliome v0.2842 B9D1 Zornitza Stark changed review comment from: Two unrelated individuals with JS and bi-allelic variants in this gene, plus one individual with a more severe Meckel phenotype described. Intellectual disability is part of the phenotype.
Sources: Expert list; to: Two unrelated individuals with JS and bi-allelic variants in this gene, plus one individual with a more severe Meckel phenotype described. This latter individual had a splice site variant and a deletion. Splice variant proven to result in exon skipping -> PTC, but the deletion spans a large region including 18 other genes. Patient also had an additional variant in CEP290 called LP. Authors perform functional studies on patient cells but given the large deletion/CEP290 variant i dont see the results are usable PMID: 25920555 - another report of digenic inheritance - not usable, patient was only heterozygous for a single B9D1 variant.
Mendeliome v0.2825 PDXK Russell Gear gene: PDXK was added
gene: PDXK was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PDXK was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PDXK were set to (PMID: 31187503)
Phenotypes for gene: PDXK were set to Axonal polyneuropathy; optic atrophy
Review for gene: PDXK was set to RED
Added comment: Currently two unrelated families with axonal polyneuropathy and optic atrophy described in the same paper, with bi-allelic PDXK pathogenic variants. Functional work in the same paper includes work on patient derived fibroblasts, measurement of an axonal damage biomarker (NFL protein), and response to PLP supplementation treatment.

Need one further unrelated family to upgrade to green?
Sources: Literature
Mendeliome v0.2814 LRRC56 Elena Savva gene: LRRC56 was added
gene: LRRC56 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: LRRC56 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LRRC56 were set to PMID: 30388400
Phenotypes for gene: LRRC56 were set to Ciliary dyskinesia, primary, 39 618254
Added comment: PMID: 30388400 - used protist null model to show abnormal ciliary beatings, replicated the phenotype when the protist was transfected with mutant allele observed in a patient.
3 unrelated families reported with either homozygous splice, missense or chet (nonsense/splice). Patients exhibited phenotypes including chronic respiratory/ear infections, situs inversus
Sources: Expert list
Mendeliome v0.2814 MOGS Zornitza Stark Phenotypes for gene: MOGS were changed from to Congenital disorder of glycosylation, type IIb 606056
Mendeliome v0.2806 GFI1B Bryony Thompson gene: GFI1B was added
gene: GFI1B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GFI1B was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: GFI1B were set to 24325358; 23927492; 28041820; 11825872
Phenotypes for gene: GFI1B were set to Bleeding disorder, platelet-type, 17 MIM#187900
Review for gene: GFI1B was set to GREEN
Added comment: Three families with a heterozygous variant and one case with a homozygous variant, with supporting in vitro functional assays. A null mouse model contained erythroid and megakaryocytic precursors arrested in their development.
Sources: Literature
Mendeliome v0.2805 MOGS Elena Savva reviewed gene: MOGS: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 31925597; Phenotypes: Congenital disorder of glycosylation, type IIb 606056; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2791 CEP112 Bryony Thompson gene: CEP112 was added
gene: CEP112 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CEP112 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CEP112 were set to 31654588
Phenotypes for gene: CEP112 were set to Acephalic spermatozoa; infertility
Review for gene: CEP112 was set to AMBER
Added comment: Two unrelated cases reported with acephalic spermatozoa, one case with a homozygous nonsense variant and the other case with biallelic missense variants. CEP112 expression was significantly reduced in one of the cases, suggesting loss of function as a mechanism of disease.
Sources: Literature
Mendeliome v0.2790 PRKD1 Kristin Rigbye changed review comment from: Only 3 pathogenic missense reported to date, although two of these are recurring in unrelated individuals (ClinVar, Decipher, PMID: 27479907). No functional studies performed.; to: Only 3 pathogenic missense reported to date in unrelated individuals (ClinVar, Decipher, PMID: 27479907). No functional studies performed.
Mendeliome v0.2769 NDNF Zornitza Stark gene: NDNF was added
gene: NDNF was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NDNF was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: NDNF were set to 31883645
Phenotypes for gene: NDNF were set to Congenital hypogonadotropic hypogonadism (CHH)
Review for gene: NDNF was set to GREEN
Added comment: Three heterozygous protein-truncating variants and one heterozygous missense variant identified in a cohort of 240 unrelated IHH patients. The authors also provided supporting evidence from animal models.
Sources: Literature
Mendeliome v0.2767 UGDH Zornitza Stark gene: UGDH was added
gene: UGDH was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: UGDH was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: UGDH were set to 32001716
Phenotypes for gene: UGDH were set to Epileptic encephalopathy, early infantile, 84 - MIM #618792
Review for gene: UGDH was set to GREEN
Added comment: 36 individuals with biallelic UGDH pathogenic variants reported. The phenotype corresponded overall to a developmental epileptic encephalopathy with hypotonia, feeding difficulties, severe global DD, moderate or commonly severe ID in all. Hypotonia and motor disorder (incl. spasticity, dystonia, ataxia, chorea, etc) often occurred prior to the onset of seizures. A single individual did not present seizures and 2 sibs had only seizures in the setting of fever. There were no individuals with biallelic pLoF variants identified. Parental/sib studies were all compatible with AR inheritance mode.

UGDH encodes the enzyme UDP-glucose dehydrogenase which converts UDP-glucose to UDP-glucuronate, the latter being a critical component of the glycosaminoglycans, hyaluronan, chondroitin sulfate, and heparan sulfate. Patient fibroblast and biochemical assays suggested a LoF effect of variants leading to impairment of UGDH stability, oligomerization or enzymatic activity (decreased UGDH-catalyzed reduction of NAD+ to NADH / hyaluronic acid production which requires UDP-glucuronate).

Attempts to model the disorder using an already developped zebrafish model (for a hypomorphic LoF allele) were unsuccessful as fish did not exhibit seizures spontaneously or upon induction with PTZ. Modelling of the disorder in vitro using patient-derived cerebral organoids demonstrated smaller organoids due to reduced number of proliferating neural progenitors
Sources: Literature
Mendeliome v0.2764 YIF1B Zornitza Stark gene: YIF1B was added
gene: YIF1B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: YIF1B was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: YIF1B were set to 32006098; 26077767
Phenotypes for gene: YIF1B were set to Central hypotonia; Failure to thrive; Microcephaly; Global developmental delay; Intellectual disability; Seizures; Spasticity; Abnormality of movement
Review for gene: YIF1B was set to GREEN
Added comment: 6 individuals (from 5 families) with biallelic YIF1B truncating variants reported. Presenting features: hypotonia, failure to thrive, microcephaly (5/6), severe global DD and ID as well as features suggestive of a motor disorder (dystonia/spasticity/dyskinesia). Seizures were reported in 2 unrelated individuals (2/6). MRI abnormalities were observed in some with thin CC being a feature in 3. Affected individuals were found to be homozygous for truncating variants (4/5 families being consanguineous). The following 3 variants were identified (NM_001039672.2) : c.186dupT or p.Ala64fs / c.360_361insACAT or p.Gly121fs / c.598G>T or p.Glu200*. Yif1B KO mice demonstrate a disorganized Golgi architecture in pyramidal hippocampal neurons (Alterio et al 2015 - PMID: 26077767). Functional/network analysis of genes co-regulated with YIF1B based on available RNAseq data, suggest enrichement in in genes important for nervous system development and function.
Sources: Literature
Mendeliome v0.2759 TNRC6B Zornitza Stark edited their review of gene: TNRC6B: Added comment: 17 unrelated individuals with heterozygous TNRC6B variants reported. Features included hypotonia (10/17), DD/ID (17/17 - ID was not universal: average IQ of 12 individuals was 73 (range : 50-113) with 4 having below 70), ADHD (11/17), ASD or autistic traits (8/17 and 5/17). Some/few presented with abnormal OFC (micro- / macrocephaly in 3/17 and 2/17), abnormal vision or hearing, variable other congenital anomalies, echocardiographic, GI or renal abnormalities, etc. Epilepsy was reported in 1/17. There was no recognisable gestalt.Detected variants included 14 pLoF, 1 missense SNV and 2 intragenic deletions. Variants had occurred as de novo events in 10/13 subjects for whom testing of both parents was possible. 3/13 subjects had inherited the variant from a parent with milder phenotype. Based on the type of variants identified, the pLI score of 1 in gnomAD and the HI index of 5.61%, the authors suggest haploinsufficiency as the most likely mechanism. Individuals with de novo TNRC6B variants have also been reported in larger cohorts (e.g. DDD study - PMID: 28135719, Iossifov et al - PMID: 25363768, Lelieveld et al - PMID: 27479843, Jónsson et al - PMID: 28959963). A previous study provided details on 2 sibs harboring a translocation which disrupted both TNRC6B and TCF20 (also associated with ID)(Babbs et al - PMID: 25228304).; Changed rating: GREEN; Changed publications: 32152250, 28135719, 25363768, 27479843, 28959963, 25228304; Changed phenotypes: Global developmental delay, Intellectual disability, Autistic behavior; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.2742 CFAP43 Elena Savva gene: CFAP43 was added
gene: CFAP43 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CFAP43 was set to BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
Publications for gene: CFAP43 were set to PMID: 31884020; 28552195; 31004071; 29449551
Phenotypes for gene: CFAP43 were set to Hydrocephalus, normal pressure, 1 236690; Spermatogenic failure 19 617592
Added comment: aka WDR96

PMID: 31884020 - animal models (mouse, frog) demonstrate the protein localizes in ciliary axoneme and is involved in MOTILE cilia movement. LOF CFAP43 caused mucus acucmulation in airways, impaired spermatogenesis and hydrocephalus.

PMID: 28552195 - 3x chet (bilallelic PTCs or chet PTC/missense) with abnormal sperm motility. Null mouse models were also infertile.

PMID: 31004071 - one family with a heterozygous nonsense and AD inheritance of late onset hydrocephaly (checked in Mutalyzer, variant is NMD predicted). Abnormal cilia observed from mucosa sample. Null mice also show abnormal sperm and dilation of brain ventricles.

PMID: 29449551 - reports an additional 10 patients with either homozygous PTCs or chet PTC/missense who were infertile with flagella defects

Summary: single report of AD hydrocephaly
Sources: Literature
Mendeliome v0.2729 CCDC28B Zornitza Stark edited their review of gene: CCDC28B: Added comment: PMID: 32139166 - Single family with Joubert syndrome. Patient was homozygous for a missense, with polydactyly, severe ID, and the molar tooth sign observed in MRI. Sibling fetus MRI showed vermis hypoplasia, and was also homozygous for the variant. Parents confirmed unaffected carriers. Knockdown of CCDC28B in human TERT retinal pigment epithelial cells reduced both the number and length of cilia 430C-T variant is postulated to be a modifier of BBS.; Changed rating: AMBER; Changed publications: 32139166; Changed phenotypes: {Bardet-Biedl syndrome 1, modifier of}, MIM#209900, Joubert syndrome
Mendeliome v0.2729 C21orf59 Zornitza Stark Added comment: Comment when marking as ready: p.Tyr245* recurrent in the Ashkenazi Jewish population
Mendeliome v0.2723 ARMC9 Zornitza Stark edited their review of gene: ARMC9: Added comment: ARMC9 localizes to the ciliary basal body and daughter centriole and is predicted to function in ciliogenesis PMID: 28625504 - 8 families with Joubert syndrome, all variant types detected. Functional studies show protein localizes at the basal body and upregulates during ciliogenesis. Zebrafish with frameshift mutation recapitulated the human phenotype including a curved body, coloboma, retinal dystrophy and less cilia.; Changed rating: GREEN; Changed publications: 28625504
Mendeliome v0.2693 ATP5A1 Zornitza Stark Phenotypes for gene: ATP5A1 were changed from to Combined oxidative phosphorylation deficiency 22 616045; Mitochondrial complex V (ATP synthase) deficiency nuclear type 4, 615228
Mendeliome v0.2689 ATP5A1 Zornitza Stark reviewed gene: ATP5A1: Rating: AMBER; Mode of pathogenicity: None; Publications: 23599390; Phenotypes: Combined oxidative phosphorylation deficiency 22 616045, Mitochondrial complex V (ATP synthase) deficiency nuclear type 4, 615228; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2685 TNK2 Zornitza Stark Phenotypes for gene: TNK2 were changed from to late onset infantile epilepsy; Mayer-Rokitansky-Küster-Hauser syndrome
Mendeliome v0.2681 MAN2B2 Zornitza Stark gene: MAN2B2 was added
gene: MAN2B2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MAN2B2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MAN2B2 were set to 31775018
Phenotypes for gene: MAN2B2 were set to Congenital disorder of glycosylation; immunodeficiency
Review for gene: MAN2B2 was set to RED
Added comment: Single individual reported.
Sources: Literature
Mendeliome v0.2680 TNK2 Elena Savva reviewed gene: TNK2: Rating: AMBER; Mode of pathogenicity: None; Publications: PMID 27977884, 23686771, 31517310; Phenotypes: late onset infantile epilepsy, Mayer-Rokitansky-Küster-Hauser syndrome; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2676 PIK3CG Zornitza Stark gene: PIK3CG was added
gene: PIK3CG was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PIK3CG was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIK3CG were set to 32001535; 31554793
Phenotypes for gene: PIK3CG were set to Immune dysregulation; HLH-like; childhood-onset antibody defects; cytopenias; T lymphocytic pneumonitis and colitis
Review for gene: PIK3CG was set to GREEN
Added comment: Two individuals with complex immunological phenotypes reported and a mouse model.
Sources: Literature
Mendeliome v0.2659 SNORA31 Zornitza Stark gene: SNORA31 was added
gene: SNORA31 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SNORA31 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SNORA31 were set to 31806906
Phenotypes for gene: SNORA31 were set to Susceptibility to HSV1 encephalitis
Review for gene: SNORA31 was set to GREEN
Added comment: Five unrelated individuals reported with rare missense variants in this gene, functional data to support susceptibility to herpes simplex encephalitis.
Sources: Expert list
Mendeliome v0.2649 CTSA Zornitza Stark Phenotypes for gene: CTSA were changed from to Galactosialidosis, MIM# 256540; Cathepsin A-related arteriopathy with strokes and leukoencephalopathy
Mendeliome v0.2635 CTSA Zornitza Stark reviewed gene: CTSA: Rating: GREEN; Mode of pathogenicity: None; Publications: 31177426; Phenotypes: Galactosialidosis, MIM# 256540, Cathepsin A-related arteriopathy with strokes and leukoencephalopathy; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.2634 CDK19 Zornitza Stark gene: CDK19 was added
gene: CDK19 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CDK19 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CDK19 were set to 32330417
Phenotypes for gene: CDK19 were set to Intellectual disability; epileptic encephalopathy
Review for gene: CDK19 was set to GREEN
Added comment: Three unrelated individuals with de novo missense variants reported, and intellectual disability/epileptic encephalopathy. Supportive functional data.
Sources: Literature
Mendeliome v0.2632 MNS1 Zornitza Stark gene: MNS1 was added
gene: MNS1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MNS1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MNS1 were set to 31534215; 30148830
Phenotypes for gene: MNS1 were set to Heterotaxy; male infertility
Review for gene: MNS1 was set to GREEN
Added comment: Eight families reported altogether, three LoF variants. Four Amish families share same homozygous founder variant, and some of the other reported families are consanguineous and share another founder variant. A reported female with a third variant, also had a homozygous variant in DNAH5 with a blended phenotype postulated.
Sources: Literature
Mendeliome v0.2625 ALPK1 Zornitza Stark changed review comment from: Three unrelated families reported. One of the variants segregated in four affected individuals in one family and another was found to be de novo. The third variant however was not segregated, and is also present in 18 individuals in gnomad. Hence the evidence for variant pathogenicity in this third case is not compelling.
Sources: Literature; to: Three unrelated families reported with PFAPA phenotype. One of the variants segregated in four affected individuals in one family and another was found to be de novo. The third variant however was not segregated, and is also present in 18 individuals in gnomad. Hence the evidence for variant pathogenicity in this third case is not compelling.
Sources: Literature
Mendeliome v0.2625 ALPK1 Zornitza Stark edited their review of gene: ALPK1: Added comment: Six unrelated families reported with same recurrent missense variant c.710C>T, (p.Thr237Met) and ROSAH syndrome phenotype. Pancytopaenia and recurrent infections present in some.; Changed rating: GREEN; Changed publications: 31053777, 30967659, 31939038; Changed phenotypes: Periodic fever, aphthous stomatitis, pharyngitis and adenitis (PFAPA) syndrome, ROSAH syndrome, retinal dystrophy, optic nerve edema, splenomegaly, anhidrosis, and migraine headache
Mendeliome v0.2620 GALM Hazel Phillimore gene: GALM was added
gene: GALM was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GALM was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GALM were set to PMID: 30451973; 30910422
Phenotypes for gene: GALM were set to galactosaemia; type IV galactosaemia
Review for gene: GALM was set to GREEN
Added comment: Homozygous and compound heterozygous variants (missense, nonsense and frameshift) found in 8 Japanese patients from unrelated families with unexplained galactosaemia. (No variants in GALT, GALK1, and GALE). This is therefore type IV galactosaemia.
In vitro expression analysis and enzyme activity assay of the patients’ peripheral blood mononuclear cells showed total lack of or compromised expression of GALM protein. Loss-of-function mechanism. One homozygote for one of these variants p.(Gly142Arg) in gnomAD (African population). (Wada, Y. et al 2019; PMID: 30451973)
In vitro expression assay and an enzyme activity assay of 67 GALM variants, taken from ExAc database (missense, nonsense, frameshift and splice). 30 variants concluded to be pathogenic due to no protein expression or faint expression. 5 variants with mildly lower levels were determined as likely pathogenic. All concluded to be loss-of-function mechanism. Incidence of galactosaemia by GALM deficiency is comparable to that of other galactosaemias. Carrier frequency and incidence was estimated for different populations. (Iwasawa, S. et al. (2019); PMID: 30910422)
Sources: Literature
Mendeliome v0.2620 POLR3GL Paul De Fazio gene: POLR3GL was added
gene: POLR3GL was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: POLR3GL was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: POLR3GL were set to 31089205; 31695177
Phenotypes for gene: POLR3GL were set to endosteal hyperostosis; oligodontia; growth retardation; facial dysmorphisms; lipodystrophy
Review for gene: POLR3GL was set to AMBER
gene: POLR3GL was marked as current diagnostic
Added comment: Biallelic canonical splice variants were identified in monozygotic twins and another individual with similar phenotypes from 2 unrelated families. Variants were inherited from carrier parents. RNA studies confirmed exon skipping occurs in all affected individuals.

A separate study identified a homozygous nonsense variant in an individual with features of Neonatal progeroid syndrome/Wiedemann–Rautenstrauch syndrome. Quantitative PCR showed reduction in mRNA suggestive of NMD.
Sources: Literature
Mendeliome v0.2620 TSPEAR Zornitza Stark Added comment: Comment when marking as ready: Association with isolated deafness is DISPUTED.
Mendeliome v0.2611 TSPEAR Chern Lim changed review comment from: Still a rare disease gene for ectodermal dysplasia but has been reported in at least 3 unrelated families. Functional study supported LoF. (PMIDs: 27736875, 30046887); to: Still a rare disease gene for ectodermal dysplasia but has been reported in at least 3 unrelated families in 2 papers. Functional study supported LoF. (PMIDs: 27736875, 30046887)
Mendeliome v0.2611 PDGFRB Ee Ming Wong changed review comment from: - > 3 unrelated families
- Functional studies on patient fibroblasts, HeLa and HEK293 cells harbouring mutant constructs demonstrate constitutive tyrosine kinase activation (gain of function) compared with WT constructs; to: - > 3 unrelated individuals diagnosed with Penttinen syndrome
- Functional studies on patient fibroblasts, HeLa and HEK293 cells harbouring mutant constructs demonstrate constitutive tyrosine kinase activation (gain of function) compared with WT constructs
Mendeliome v0.2607 FOXF2 Hazel Phillimore changed review comment from: Homozygous missense, NM_001452.1: c.325A>T (p.I109F), in a 10 year old girl (consanguineous, parents were first cousins) with profound sensorineural hearing loss (SNHL) associated with incomplete partition type I anomaly of the cochlea. This variant is absent in the gnomAD v2.1.1. In vitro studies indicated instability, shorter half-life of the protein compared to wildtype. Embryonic knockout mouse showed shortened and malformed cochleae, in addition to altered shape of hair cells with innervation and planar cell polarity defects. Homozygous knockout mice do not survive. (Bademci, G. et al. (2019); PMID: 30561639).
This gene has also been reported in association with other anomalies including cleft lip, cleft palate, brain anomalies, intestine anomalies, and eye anomalies. Eye anomalies include anterior segment dysgenesis, as shown in mice with variant, W174R, affecting the Fox domain. Homozygote mice do not survive. (McKeone, R. et al. (2011); PMID: 22022403).
Sources: Literature; to: Homozygous missense, NM_001452.1: c.325A>T (p.I109F), in a 10 year old girl (consanguineous, parents were first cousins) with profound sensorineural hearing loss (SNHL) associated with incomplete partition type I anomaly of the cochlea. This variant is absent in the gnomAD v2.1.1. In vitro studies indicated instability, shorter half-life of the protein compared to wildtype. Embryonic knockout mouse showed shortened and malformed cochleae, in addition to altered shape of hair cells with innervation and planar cell polarity defects. Homozygous knockout mice do not survive. (Bademci, G. et al. (2019); PMID: 30561639).
This gene has also been reported in association with other anomalies including cleft lip, cleft palate, brain anomalies, intestine anomalies, and eye anomalies. Eye anomalies include anterior segment dysgenesis, as shown in mice with variant, W174R, affecting the Fox domain. Homozygote mice do not survive. (McKeone, R. et al. (2011); PMID: 22022403).
Previous names for FOXF2 include FKHL6 and FREAC2.
Sources: Literature
Mendeliome v0.2607 FOXF2 Hazel Phillimore gene: FOXF2 was added
gene: FOXF2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FOXF2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FOXF2 were set to PMID: 30561639; 22022403
Phenotypes for gene: FOXF2 were set to profound sensorineural hearing loss (SNHL); cochlea malformations; incomplete partition type I anomaly of the cochlea
Review for gene: FOXF2 was set to AMBER
Added comment: Homozygous missense, NM_001452.1: c.325A>T (p.I109F), in a 10 year old girl (consanguineous, parents were first cousins) with profound sensorineural hearing loss (SNHL) associated with incomplete partition type I anomaly of the cochlea. This variant is absent in the gnomAD v2.1.1. In vitro studies indicated instability, shorter half-life of the protein compared to wildtype. Embryonic knockout mouse showed shortened and malformed cochleae, in addition to altered shape of hair cells with innervation and planar cell polarity defects. Homozygous knockout mice do not survive. (Bademci, G. et al. (2019); PMID: 30561639).
This gene has also been reported in association with other anomalies including cleft lip, cleft palate, brain anomalies, intestine anomalies, and eye anomalies. Eye anomalies include anterior segment dysgenesis, as shown in mice with variant, W174R, affecting the Fox domain. Homozygote mice do not survive. (McKeone, R. et al. (2011); PMID: 22022403).
Sources: Literature
Mendeliome v0.2583 ALPK1 Zornitza Stark gene: ALPK1 was added
gene: ALPK1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ALPK1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ALPK1 were set to 31053777
Phenotypes for gene: ALPK1 were set to Periodic fever, aphthous stomatitis, pharyngitis and adenitis (PFAPA) syndrome
Review for gene: ALPK1 was set to AMBER
Added comment: Three unrelated families reported. One of the variants segregated in four affected individuals in one family and another was found to be de novo. The third variant however was not segregated, and is also present in 18 individuals in gnomad. Hence the evidence for variant pathogenicity in this third case is not compelling.
Sources: Literature
Mendeliome v0.2581 LRRC32 Zornitza Stark gene: LRRC32 was added
gene: LRRC32 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LRRC32 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LRRC32 were set to 30976112
Phenotypes for gene: LRRC32 were set to Intellectual disability; cleft palate; proliferative retinopathy
Review for gene: LRRC32 was set to AMBER
Added comment: Three individuals from two consanguineous families segregated the same homozygous bi-allelic variant, c.1630C>T; p.(Arg544Ter), shared haplotype indicative of founder effect. Mouse model has cleft palate and neonatal death.
Sources: Literature
Mendeliome v0.2580 KIF12 Ee Ming Wong gene: KIF12 was added
gene: KIF12 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KIF12 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: KIF12 were set to PMID: 30250217; 30976738
Phenotypes for gene: KIF12 were set to Prenatal cholestasis; High Gamma-Glutamyltransferase (GGT)
Review for gene: KIF12 was set to AMBER
gene: KIF12 was marked as current diagnostic
Added comment: > 3 unrelated families,but they are all consanguineous families
Sources: Literature
Mendeliome v0.2579 CSGALNACT1 Zornitza Stark reviewed gene: CSGALNACT1: Rating: GREEN; Mode of pathogenicity: None; Publications: 31705726, 31325655; Phenotypes: Congenital disorder of glycosylation, skeletal dysplasia; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2574 IQCE Zornitza Stark gene: IQCE was added
gene: IQCE was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IQCE was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: IQCE were set to 31549751; 28488682
Phenotypes for gene: IQCE were set to Postaxial polydactyly
Review for gene: IQCE was set to GREEN
Added comment: Four families reported with bi-allelic variants in this gene. The c.895_904del (p.Val301Serfs*8) was found in three of the families without sharing a common haplotype, suggesting a recurrent mechanism. RNA expression analysis on patients’ fibroblasts showed that the dysfunction of IQCE leads to the dysregulation of genes associated with the hedgehog‐signaling pathway, and zebrafish experiments demonstrated a full spectrum of phenotypes linked to defective cilia: Body curvature, kidney cysts, left–right asymmetry, misdirected cilia in the pronephric duct, and retinal defects.
Sources: Literature
Mendeliome v0.2573 NKX2-3 Zornitza Stark gene: NKX2-3 was added
gene: NKX2-3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NKX2-3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: NKX2-3 were set to 31498527
Phenotypes for gene: NKX2-3 were set to Intestinal varicosities
Review for gene: NKX2-3 was set to RED
Added comment: Single multiplex family where truncating variant in this gene segregated with intestinal varicosities with a LOD score of 3.3. NKX2‐3 is a component of a molecular pathway underlying spleen and gut vasculature development in mice.
Sources: Literature
Mendeliome v0.2572 RPSA Zornitza Stark Phenotypes for gene: RPSA were changed from to Asplenia, isolated congenital 271400; Idiopathic intestinal varices
Mendeliome v0.2569 RPSA Zornitza Stark reviewed gene: RPSA: Rating: GREEN; Mode of pathogenicity: None; Publications: 23579497, 31498527; Phenotypes: Asplenia, isolated congenital 271400, Idiopathic intestinal varices; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.2566 CRAT Zornitza Stark gene: CRAT was added
gene: CRAT was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CRAT was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CRAT were set to 29395073; 31448845
Phenotypes for gene: CRAT were set to Neurodegeneration with brain iron accumulation 8, MIM# 617917; Leigh syndrome
Review for gene: CRAT was set to AMBER
Added comment: Two unrelated families reported with bi-allelic variants, one with NBIA and one with Leigh syndrome phenotype.
Sources: Literature
Mendeliome v0.2556 THG1L Zornitza Stark changed review comment from: Five individuals from two Ashkenazi Jewish families with same homozygous missense variant, and another family ascertained through a large microcephaly cohort, also with SCA.
Sources: Literature; to: Four Ashkenazi Jewish families with same homozygous missense variant, and another family ascertained through a large microcephaly cohort, also with SCA. A carrier rate of 0.8%, but no THG1L V55A homozygotes, was found in a cohort of 3,232 unrelated Ashkenazi Jewish individuals, and no homozygotes found in Exac or gnomAD.
Sources: Literature
Mendeliome v0.2551 ZP2 Zornitza Stark gene: ZP2 was added
gene: ZP2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZP2 were set to 30810869; 29895852
Phenotypes for gene: ZP2 were set to Female infertility
Review for gene: ZP2 was set to GREEN
Added comment: Three unrelated individuals reported with bi-allelic variants in this gene and thin zona pellucida.
Sources: Literature
Mendeliome v0.2549 GAD1 Zornitza Stark edited their review of gene: GAD1: Added comment: 2020: 11 individuals from 6 consanguineous families reported with bi-allelic LOF variant and a developmental/epileptic encephalopathy. Seizure onset occurred in the first 2 months of life in all. All 10 individuals, from whom early disease history was available, presented with seizure onset in the first month of life, mainly consisting of epileptic spasms or myoclonic seizures. Early EEG showed suppression-burst or pattern of burst attenuation or hypsarrhythmia if only recorded in the post-neonatal period. Eight individuals had joint contractures and/or pes equinovarus. Seven presented a cleft palate and two also had an omphalocele, reproducing the phenotype of the knockout Gad1−/− mouse model. Four individuals died before 4 years of age.; Changed rating: GREEN; Changed publications: 15571623, 32282878; Changed phenotypes: Cerebral palsy, spastic quadriplegic, 1, MIM#603513, Developmental and epileptic encephalopathy
Mendeliome v0.2548 GALNT2 Zornitza Stark gene: GALNT2 was added
gene: GALNT2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GALNT2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GALNT2 were set to 32293671
Phenotypes for gene: GALNT2 were set to Congenital disorder of glycosylation
Review for gene: GALNT2 was set to GREEN
Added comment: Seven individuals from four families reported with bi-allelic LOF variants and global developmental delay, intellectual disability with language deficit, autistic features, behavioural abnormalities, epilepsy, chronic insomnia, white matter changes on brain MRI, dysmorphic features, decreased stature, and decreased high density lipoprotein cholesterol levels. Rodent (mouse and rat) models of GALNT2-CDG recapitulated much of the human phenotype, including poor growth and neurodevelopmental abnormalities.
Sources: Literature
Mendeliome v0.2509 ABCA4 Zornitza Stark Phenotypes for gene: ABCA4 were changed from to Cone-rod dystrophy 3, 604116; Fundus flavimaculatus, 248200; Retinal dystrophy, early-onset severe, 248200; Retinitis pigmentosa 19, 601718; Stargardt disease 1, 248200
Mendeliome v0.2498 POLR1B Zornitza Stark Phenotypes for gene: POLR1B were changed from bilateral malar and mandibular hypoplasia; microtia; coloboma; downslanting palpebral fissures; conductive deafness; cleft palate; heart malformations to Treacher-Collins syndrome
Mendeliome v0.2496 POLR1B Zornitza Stark changed review comment from: Five unrelated families and a zebrafish model.; to: Five unrelated families and a zebrafish model. Note four of the families had missense variants affecting same residue, p.Arg1003
Mendeliome v0.2496 POLR1B Zornitza Stark changed review comment from: Six unrelated families and a zebrafish model.; to: Five unrelated families and a zebrafish model.
Mendeliome v0.2493 C1orf194 Zornitza Stark Added comment: Comment when marking as ready: Two unrelated families with missense variants, one with intermediate CMT, the other with demyelinating CMT. Different phenotypic manifestations may relate to different mechanism, but this remains to be fully elucidated. Supportive mouse model.
Mendeliome v0.2474 MRPS14 Zornitza Stark Phenotypes for gene: MRPS14 were changed from Combined oxidative phosphorylation deficiency 38, MIM# 618378 to Combined oxidative phosphorylation deficiency 38, MIM# 618378; perinatal hypertrophic cardiomyopathy, growth retardation, muscle hypotonia, elevated lactate, dysmorphy and intellectual disability
Mendeliome v0.2466 SIGMAR1 Zornitza Stark Phenotypes for gene: SIGMAR1 were changed from to Amyotrophic lateral sclerosis 16, juvenile 614373; ?Spinal muscular atrophy, distal, autosomal recessive, 2 605726; distal hereditary motor neuropathy of Jerash type (HMNJ)
Mendeliome v0.2458 KLHL24 Zornitza Stark Phenotypes for gene: KLHL24 were changed from Epidermolysis bullosa simplex, generalized, with scarring and hair loss OMIM#617294; dilated cardiomyopathy to Epidermolysis bullosa simplex, generalized, with scarring and hair loss OMIM#617294; dilated cardiomyopathy; Hypertrophic cardiomyopathy
Mendeliome v0.2455 FEM1B Zornitza Stark Added comment: Comment when marking as ready: Agree cannot be confident these represent three unrelated families.
Mendeliome v0.2449 SMCHD1 Zornitza Stark Added comment: Comment when marking as ready: Note association with FSHD2 is postulated to have digenic inheritance, caused by the combination of a heterozygous mutation in the SMCHD1 gene (614982) on chromosome 18p and presence of a haplotype on chromosome 4 that is permissive for DUX4 (606009) expression.
Mendeliome v0.2440 SLC6A6 Chern Lim gene: SLC6A6 was added
gene: SLC6A6 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SLC6A6 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC6A6 were set to 31345061; 31903486; 29886034
Phenotypes for gene: SLC6A6 were set to Early retinal degeneration; cardiomyopathy
Review for gene: SLC6A6 was set to AMBER
Added comment: Different homozygous missense variants in 2 unrelated consanguineous families with early retinal degeneration, some functional studies. Patients in one of the families also had cardiomyopathy. (PMIDs: 31345061, 31903486)

One dilated cardiomyopathy patient with a homozygous deletion at a splice site (PMID: 29886034).
Sources: Literature
Mendeliome v0.2440 CAP2 Melanie Marty edited their review of gene: CAP2: Added comment: 2 patients with dilated cardiomyopathy from 1 consanguineous family. The splice variant identified in this family was proven to cause exon skipping and functional studies showed protein level was reduced. A Cap2 knockout mouse model correlated with the clinical phenotype of DCM and cardiac conduction disease, but not the other effects on growth, viability, wound healing and eye development.; Changed rating: RED
Mendeliome v0.2440 ATOH7 Paul De Fazio changed review comment from: Segregates with disease in 3 consanguineous families from Pakistan/Turkey and one non-consanguineous family of Swiss origin. Functional effect was demonstrated in the latter family. The mouse homolog is required for retinal ganglion cell and optic nerve formation.; to: Segregates with disease in 3 consanguineous families from Pakistan/Turkey with global eye abnormalities, and one non-consanguineous family of Swiss origin with optic nerve hypoplasia. Functional effect was demonstrated in the latter family. The mouse homolog is required for retinal ganglion cell and optic nerve formation (in mice).
Mendeliome v0.2440 GFAP Paul De Fazio changed review comment from: Many (>20) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.; to: Many (>10) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.
Mendeliome v0.2440 GFAP Paul De Fazio changed review comment from: Many (>10) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.; to: Many (>20) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.
Mendeliome v0.2440 PKDCC Paul De Fazio changed review comment from: 2 ("apparently") unrelated individuals with homozygous LoF (1x nonsense, 1x canonical splice) variants reported. Their phenotype is similar to knockout mice.
Sources: Literature; to: 2 apparently unrelated individuals with homozygous LoF (1x nonsense, 1x canonical splice) variants reported. Their phenotype is similar to knockout mice.
Sources: Literature
Mendeliome v0.2440 CDKL5 Teresa Zhao reviewed gene: CDKL5: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Epileptic encephalopathy, early infantile, 2, MIM 300672; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.2440 REC114 Michelle Torres gene: REC114 was added
gene: REC114 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: REC114 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: REC114 were set to 30388401; 31704776
Phenotypes for gene: REC114 were set to Female infertility
Review for gene: REC114 was set to GREEN
Added comment: Three variants reported are either within or flanking exon 4.
- One hom patient (splice) had a miscarriage, 2 spontaneous complete hydatidiform moles, and 1 complete hydatidiform mole following intrauterine sperm injection (PMID: 30388401)
- Two hom unrelated patients from consanguineous families with abnormal pronuclear formation during fertilisation and subsequent early embrionic arrest resulting in female infertility. Both variants (1 missense and 1 splice) were shown to result in LoF (PMID: 31704776)
Sources: Literature
Mendeliome v0.2439 POLR1B Paul De Fazio gene: POLR1B was added
gene: POLR1B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: POLR1B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: POLR1B were set to 31649276
Phenotypes for gene: POLR1B were set to bilateral malar and mandibular hypoplasia; microtia; coloboma; downslanting palpebral fissures; conductive deafness; cleft palate; heart malformations
Review for gene: POLR1B was set to AMBER
gene: POLR1B was marked as current diagnostic
Added comment: 6 individuals with Treacher-Collins syndrome described: 3 with de novo variants, one inherited from a mosaic father, and two inherited from affected mothers. Knockdown in zebrafish mimics the phenotype.
Sources: Literature
Mendeliome v0.2436 WARS Naomi Baker gene: WARS was added
gene: WARS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: WARS was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: WARS were set to PMID: 28369220; 31321409; 31069783.
Phenotypes for gene: WARS were set to Neuronopathy, distal hereditary motor, type IX (OMIM:617721); juvenile to adult onset (15-23 years); distal wasting; distal weakness; length-dependent motor axonal degeneration
Review for gene: WARS was set to GREEN
Added comment: 14 patients from five families were reported to have WARS-related neuropathy across three publications. Expression studies of mutant demonstrated decreased protein when compared to wild-type.
Sources: Literature
Mendeliome v0.2434 CYLD Zornitza Stark Phenotypes for gene: CYLD were changed from to Brooke-Spiegler syndrome, 605041; Cylindromatosis, familial, 132700; Trichoepithelioma, multiple familial, 1, 601606; Frontotemporal dementia and amyotrophic lateral sclerosis
Mendeliome v0.2431 PCDH19 Zornitza Stark Phenotypes for gene: PCDH19 were changed from to Epileptic encephalopathy, early infantile, 9 300088; PCDH19-related epilepsy (early seizure onset, generalised or focused seizures); cognitive impairment
Mendeliome v0.2421 PLOD3 Alison Yeung Added comment: Comment when marking as ready: >3 unrelated families reported
Mendeliome v0.2418 TBX6 Alison Yeung Added comment: Comment when marking as ready: Biallelic variants associated with spondylocostal dysostosis in >3 unrelated individuals
Mouse model recapitulates phenotype
Mendeliome v0.2416 ABCA4 Kristin Rigbye reviewed gene: ABCA4: Rating: GREEN; Mode of pathogenicity: None; Publications: 9054934, 30480703, 29847635, 29971439, 16103129, 30643219; Phenotypes: Cone-rod dystrophy 3, 604116, Fundus flavimaculatus, 248200, Retinal dystrophy, early-onset severe, 248200, Retinitis pigmentosa 19, 601718, Stargardt disease 1, 248200; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2401 CPSF1 Kristin Rigbye changed review comment from: 6 unrelated probands reported (3 nonsense, 1 frameshift, 1 splice, 1 missense) with variants all assumed to result in a loss of function. Variants were shown to be inherited from affected parents in 2 families. Gene-disease association was supported by knockdown of cpsf1 in zebrafish which caused abnormal ocular morphogenesis (30689892).
Sources: Literature; to: 6 unrelated probands reported (3 nonsense, 1 frameshift, 1 splice, 1 missense) with variants all assumed to result in a loss of function. Variants were shown to be inherited from affected parents in 2 families. Gene-disease association was supported by knockdown of cpsf1 in zebrafish which caused abnormal ocular morphogenesis (PMID: 30689892).
Sources: Literature
Mendeliome v0.2401 CPSF1 Kristin Rigbye gene: CPSF1 was added
gene: CPSF1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CPSF1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CPSF1 were set to 30689892
Phenotypes for gene: CPSF1 were set to Myopia 27, 618827; high myopia; early-onset high myopiaHigh myopia
Review for gene: CPSF1 was set to GREEN
Added comment: 6 unrelated probands reported (3 nonsense, 1 frameshift, 1 splice, 1 missense) with variants all assumed to result in a loss of function. Variants were shown to be inherited from affected parents in 2 families. Gene-disease association was supported by knockdown of cpsf1 in zebrafish which caused abnormal ocular morphogenesis (30689892).
Sources: Literature
Mendeliome v0.2396 NAA10 Zornitza Stark Mode of inheritance for gene: NAA10 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.2395 WDR45 Zornitza Stark Phenotypes for gene: WDR45 were changed from to Neurodegeneration with brain iron accumulation 5 300894; Rett syndrome; Rett-like phenotypes
Mendeliome v0.2392 SIGMAR1 Michelle Torres reviewed gene: SIGMAR1: Rating: GREEN; Mode of pathogenicity: None; Publications: 31511340; Phenotypes: ?Amyotrophic lateral sclerosis 16, juvenile 614373, ?Spinal muscular atrophy, distal, autosomal recessive, 2 605726, distal hereditary motor neuropathy of Jerash type (HMNJ); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2392 SOD2 Zornitza Stark Phenotypes for gene: SOD2 were changed from {Microvascular complications of diabetes 6} 612634 to {Microvascular complications of diabetes 6} 612634; Lethal neonatal dilated cardiomyopathy
Mendeliome v0.2383 SMCHD1 Teresa Zhao changed review comment from: Seven probands with FSHD reported to have LP/P variants, which all predicted to disrupt the structure and conformation of SMCHD1.; to: Seven probands with FSHD reported to have LP/P variants, which all predicted to disrupt the structure and conformation of SMCHD1.

No particular geno-pheno correlation, but location of missense variants within the ATPase domain of MSCHD1 may contribute to the differences in phenotypic outcome (PMID: 31243061)
Mendeliome v0.2383 GFAP Paul De Fazio changed review comment from: Many (>10) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.; to: Many (>10) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.
Mendeliome v0.2383 GFAP Paul De Fazio changed review comment from: Many (>10) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.; to: Many (>10) de novo individuals described with Alexander disease. Three forms of disease are described with decreasing severity: infant-onset, juveline-onset, and adult-onset. Later-onset cases are more phenotypically heterogeneous.
Mendeliome v0.2378 SEC31A Hazel Phillimore gene: SEC31A was added
gene: SEC31A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SEC31A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SEC31A were set to PMID: 30464055
Phenotypes for gene: SEC31A were set to congenital neurodevelopmental syndrome; spastic paraplegia; multiple contractures; profound developmental delay; epilepsy; failure to thrive
Review for gene: SEC31A was set to AMBER
Added comment: Frameshift. c.2776_2777, TA duplication, causing predicted p.A927fs*61 truncation and predicted NMD in 2 affected siblings in consanguineous Bedouin family with severe congenital neurological syndrome with spastic paraplegia, multiple contractures, profound developmental delay and convulsions. Failure to thrive. Lethal by age 4 years. Also had hearing defect, bilateral congenital cataract, horizontal nystagmus, with flat retina and optic atrophy. Supporting functional assays from knockout drosophila.
Sources: Literature
Mendeliome v0.2377 CDKL5 Ain Roesley reviewed gene: CDKL5: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 27080038, 30842224; Phenotypes: Rett syndrome, Rett-like phenotypes, Epileptic encephalopathy; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.2377 GSX2 Elena Savva gene: GSX2 was added
gene: GSX2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GSX2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GSX2 were set to PMID: 31412107
Phenotypes for gene: GSX2 were set to Diencephalic-mesencephalic junction dysplasia syndrome 2 618646
Review for gene: GSX2 was set to GREEN
Added comment: PMID: 31412107 - 2 unrelated patients with homozygous mutations (nonsense, missense). Functional analysis of the missense in transfected HeLa cells demonstrated protein mislocalization and protein expression. Downstream gene expression was also reduced by both mutations.

Summary: GREEN - 2 patients and functional evidence
Sources: Literature
Mendeliome v0.2376 PKDCC Alison Yeung Added comment: Comment on list classification: Two unrelated consanguineous families reported with different homozygous variants
Pre-existing mouse model has similar phenotype
Needs more functional evidence or further reported families
Mendeliome v0.2375 SPEF2 Chern Lim gene: SPEF2 was added
gene: SPEF2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SPEF2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SPEF2 were set to 31151990; 31278745; 31048344
Phenotypes for gene: SPEF2 were set to Spermatogenic failure 43, MIM#618751
Review for gene: SPEF2 was set to GREEN
gene: SPEF2 was marked as current diagnostic
Added comment: More than 3 unrelated families reported, all PTVs or splice variant. Functional studies showed SPEF2 protein levels were reduced in patients’ spermatozoa. (PMIDs: 31151990, 31278745, 31048344).
Sources: Literature
Mendeliome v0.2372 CYLD Kristin Rigbye reviewed gene: CYLD: Rating: GREEN; Mode of pathogenicity: None; Publications: 10835629, 16307661, 12950348, 19807742; Phenotypes: Brooke-Spiegler syndrome, 605041, Cylindromatosis, familial, 132700, Trichoepithelioma, multiple familial, 1, 601606, Frontotemporal dementia and amyotrophic lateral sclerosis; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.2371 PCDH19 Ee Ming Wong reviewed gene: PCDH19: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 18469813, 30287595; Phenotypes: PCDH19-related epilepsy (early seizure onset, generalised or focused seizures), cognitive impairment; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females; Current diagnostic: yes
Mendeliome v0.2365 ADAMTS19 Crystle Lee changed review comment from: PMID: 31844321; Wünnemann 2020: 4 affected in 2 unrelated consanguineous families with non-syndromic heart valve disease. 1 family with an intragenic (exon 1-8) deletion and 1 nonsense variant. Carriers unaffected. Homozygous knockout mice for Adamts19 show aortic valve dysfunction, recapitulating aspects of the human phenotype
Sources: Expert Review; to: Borderline amber/green
PMID: 31844321; Wünnemann 2020: 4 affected in 2 unrelated consanguineous families with non-syndromic heart valve disease. 1 family with an intragenic (exon 1-8) deletion and 1 nonsense variant. Carriers unaffected. Homozygous knockout mice for Adamts19 show aortic valve dysfunction, recapitulating aspects of the human phenotype
Sources: Expert Review
Mendeliome v0.2365 ADAMTS19 Crystle Lee changed review comment from: PMID: 31844321; Wünnemann 2020: 4 affected in unrelated 2 consanguineous family with non-syndromic heart valve disease. 1 family with an intragenic (exon 1-8) deletion and 1 nonsense variant. Homozygous knockout mice for Adamts19 show aortic valve dysfunction, recapitulating aspects of the human phenotype
Sources: Expert Review; to: PMID: 31844321; Wünnemann 2020: 4 affected in 2 unrelated consanguineous families with non-syndromic heart valve disease. 1 family with an intragenic (exon 1-8) deletion and 1 nonsense variant. Carriers unaffected. Homozygous knockout mice for Adamts19 show aortic valve dysfunction, recapitulating aspects of the human phenotype
Sources: Expert Review
Mendeliome v0.2365 FUS Elena Savva gene: FUS was added
gene: FUS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FUS was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: FUS were set to PMID: 32281455; 20668259; 20385912
Phenotypes for gene: FUS were set to Amyotrophic lateral sclerosis 6, with or without frontotemporal dementia 608030; Essential tremor, hereditary, 4 614782
Mode of pathogenicity for gene: FUS was set to Other
Review for gene: FUS was set to GREEN
Added comment: PMID: 32281455 - Reports a case of Pediatric Amyotrophic Lateral Sclerosis. Reviews and shows multiple other reports of ALS casued by FUS

PMID: 20668259 - additional reports of ALS

PMID: 20385912 - postulated that disruption of this region may disrupt subcellular distribution of FUS, in turn affecting transcription and RNA processing and conferring a toxic gain of function.
Sources: Literature
Mendeliome v0.2365 ADAMTS19 Crystle Lee gene: ADAMTS19 was added
gene: ADAMTS19 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: ADAMTS19 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ADAMTS19 were set to 31844321
Phenotypes for gene: ADAMTS19 were set to Non-syndromic heart valve disease
Review for gene: ADAMTS19 was set to GREEN
Added comment: PMID: 31844321; Wünnemann 2020: 4 affected in unrelated 2 consanguineous family with non-syndromic heart valve disease. 1 family with an intragenic (exon 1-8) deletion and 1 nonsense variant. Homozygous knockout mice for Adamts19 show aortic valve dysfunction, recapitulating aspects of the human phenotype
Sources: Expert Review
Mendeliome v0.2365 ELOVL1 Hazel Phillimore changed review comment from: De novo in 2 unrelated patients. Decrease in ELOVL1 enzyme activity. The same 2 patients are in PMIDs: 30487246 and 29496980 but with different clinical findings. Deafness and optic atrophy are the additional features.; to: De novo missense (S165F) in 2 unrelated patients. Decrease in ELOVL1 enzyme activity. The same 2 patients are in PMIDs: 30487246 and 29496980 but with different clinical findings. Deafness and optic atrophy are the additional features.
Mendeliome v0.2365 C9orf72 Elena Savva gene: C9orf72 was added
gene: C9orf72 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: C9orf72 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: C9orf72 were set to PMID: 30120348; 23284068
Phenotypes for gene: C9orf72 were set to Frontotemporal dementia and/or amyotrophic lateral sclerosis 1 105550
Review for gene: C9orf72 was set to AMBER
Added comment: Possibly RED

Caused by expansion of GGGGCC repeats, dont know if these qualify for mendeliome
Sources: Literature
Mendeliome v0.2364 CAP2 Melanie Marty gene: CAP2 was added
gene: CAP2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CAP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CAP2 were set to 30518548
Phenotypes for gene: CAP2 were set to Dilated cardiomyopathy
Review for gene: CAP2 was set to AMBER
Added comment: 2 patients with dilated cardiomyopathy from 1 consanguineous family. The splice variant identified in this family was proven to cause exon skipping and functional studies showed protein level was reduced. A Cap2 knockout mouse model correlated with the clinical phenotype of DCM and cardiac conduction disease, but not the other effects on growth, viability, wound healing and eye development.
Sources: Literature
Mendeliome v0.2364 USP45 Alison Yeung Added comment: Comment on list classification: Two unrelated families
Functional studies in animal model recapitulate retinal phenotype
Mendeliome v0.2361 NAA10 Naomi Baker reviewed gene: NAA10: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 30842225.; Phenotypes: syndromic X-linked microphthalmia; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.2361 SOD2 Chern Lim reviewed gene: SOD2: Rating: RED; Mode of pathogenicity: None; Publications: 31494578; Phenotypes: Lethal neonatal dilated cardiomyopathy; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2361 PKDCC Paul De Fazio gene: PKDCC was added
gene: PKDCC was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PKDCC was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PKDCC were set to PMID:30478137; 19097194
Phenotypes for gene: PKDCC were set to Dysmorphism; shortening of extremities
Review for gene: PKDCC was set to AMBER
gene: PKDCC was marked as current diagnostic
Added comment: 2 ("apparently") unrelated individuals with homozygous LoF (1x nonsense, 1x canonical splice) variants reported. Their phenotype is similar to knockout mice.
Sources: Literature
Mendeliome v0.2361 USP45 Kristin Rigbye gene: USP45 was added
gene: USP45 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: USP45 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: USP45 were set to 30573563
Phenotypes for gene: USP45 were set to Leber congenital amaurosis; retinal dystrophy
Review for gene: USP45 was set to GREEN
Added comment: 2 unrelated Chinese families reported with rare homozygous variants (one missense, one nonsense) and Leber congenital amaurosis. Animal knockout functional studies supported gene-disease association.

PMID: 30573563 "By analysing WES data based on allele frequencies of in-house controls, population allele frequencies and in silico prediction tools, two rare homozygous mutations in USP45 were identified in two unrelated families. Immunohistochemistry of USP45 in the human and zebrafish retinal sections revealed enriched expression in the inner segments of photoreceptors. The knockdown of usp45 transcript in zebrafish led to abnormal retinal development with effects on photoreceptors, which could be successfully rescued by wild-type usp45 mRNA. Moreover, targeted knockout of Usp45 in mice caused abnormal electroretinography responses, similar to that seen in patients with LCA."
Sources: Literature
Mendeliome v0.2360 BAZ2B Zornitza Stark gene: BAZ2B was added
gene: BAZ2B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: BAZ2B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: BAZ2B were set to 31999386; 28135719; 25363768
Phenotypes for gene: BAZ2B were set to Intellectual disability; autism
Review for gene: BAZ2B was set to GREEN
Added comment: Postulated as a candidate gene for ID/ASD by large-scale studies. Case series reports two individuals with small CNVs and and six with SNVs, mostly LoF type variants. Although the gene is generally intolerant of LoF, some LoF variants present in gnomad ?incomplete penetrance. Additional reported features were inconsistent
Sources: Literature
Mendeliome v0.2352 AGBL5 Zornitza Stark gene: AGBL5 was added
gene: AGBL5 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: AGBL5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: AGBL5 were set to 26720455; 26355662; 30925032
Phenotypes for gene: AGBL5 were set to Retinitis pigmentosa 75, MIM# 617023
Review for gene: AGBL5 was set to GREEN
Added comment: At least three unrelated families reported.
Sources: Expert list
Mendeliome v0.2350 CPT1C Bryony Thompson gene: CPT1C was added
gene: CPT1C was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: CPT1C was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CPT1C were set to 25751282; 23973755
Phenotypes for gene: CPT1C were set to Spastic paraplegia 73, autosomal dominant MIM#616282
Review for gene: CPT1C was set to GREEN
Added comment: Two unrelated families dominant HSP and a supportive mouse model.
Sources: Expert list
Mendeliome v0.2313 MED13L Zornitza Stark Added comment: Comment when marking as ready: The evidence for isolated CHD much less compelling than the association with a neurodevelopmental syndrome.
Mendeliome v0.2289 ACOX2 Zornitza Stark gene: ACOX2 was added
gene: ACOX2 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: ACOX2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ACOX2 were set to 27647924; 27884763
Phenotypes for gene: ACOX2 were set to Bile acid synthesis defect, congenital, 6, 617308
Review for gene: ACOX2 was set to AMBER
Added comment: Two unrelated families reported.
Sources: Expert Review
Mendeliome v0.2287 LARS Zornitza Stark gene: LARS was added
gene: LARS was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: LARS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LARS were set to 28774368; 30349989; 22607940
Phenotypes for gene: LARS were set to Infantile liver failure syndrome 1, MIM# 615438
Review for gene: LARS was set to GREEN
gene: LARS was marked as current diagnostic
Added comment: Six unrelated families reported in the literature, reviewed in PMID: 30349989.
Sources: NHS GMS
Mendeliome v0.2281 SIPA1L3 Bryony Thompson gene: SIPA1L3 was added
gene: SIPA1L3 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SIPA1L3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: SIPA1L3 were set to 28951961; 27993984; 25804400
Phenotypes for gene: SIPA1L3 were set to Cataract 45 MIM#616851
Review for gene: SIPA1L3 was set to AMBER
Added comment: A consanguineous German family segregating a homozygous nonsense mutation in two sisters with congenital cataracts (PMID: 25804400). Null Zebrafish, Xenopus and mouse models recapitulate the human cataract phenotype. A case with congenital cataracts as a feature of their condition harboured a de novo balanced chromosomal translocation, 46,XY,t(2;19)(q37.3;q13.1), where breakpoint mapping and sequencing showed a physical disruption of the 5′UTR of SIPA1L3 (PMID: 26231217). In a case with bilateral congenital cataracts a heterozygous missense (D148Y) was identified and in vitro functional assays of the variant resulted in abnormal actin morphology (PMID: 26231217).
Sources: Expert list
Mendeliome v0.2280 KCNJ11 Elena Savva edited their review of gene: KCNJ11: Added comment: Congenital hyperinsulinism (HI) variants are generally reported in heterozygous patients where they also carry a somatic 2nd hit, or have isodisomy of the paternal allele (focal HI), or in bilallelic patients (diffuse HI). This condition can be dominant (but rarely), where patients with these missense are diazoxide-responsive. Patients with recessively inherited variants are diazoxide-unresponsive (OMIM, PMID:11395395, PMID: 23275527, PMID: 23345197).

Genotype-phenotype correlation:
Permanent neonatal diabetes – GOF (OMIM)
Permanent neonatal diabetes + other features – GOF (OMIM)
Congenital hyperinsulinism – LOF (PMID:18250167).

PTCs - LOF
Missense - Loss and gain of function
LOF – cause reduce channel expression, channel activity and increase current decay (PMID:18250167)
GOF - impair ATP-based sensitivity, more open state channel (OMIM)

Mutations generally occur on the paternal allele (PMID: 23345197).; Changed publications: PMID:18250167, 11395395, 23275527, 23345197
Mendeliome v0.2279 SLC18A2 Zornitza Stark gene: SLC18A2 was added
gene: SLC18A2 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: SLC18A2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC18A2 were set to 23363473; 31240161; 26497564
Phenotypes for gene: SLC18A2 were set to Parkinsonism-dystonia, infantile, 2, MIM# 618049
Review for gene: SLC18A2 was set to GREEN
Added comment: At least three unrelated families reported, potential treatment implications
Sources: Expert Review
Mendeliome v0.2262 MARS2 Zornitza Stark Phenotypes for gene: MARS2 were changed from to Combined oxidative phosphorylation deficiency 25, OMIM #616430; Spastic ataxia 3, autosomal recessive, OMIM #611390
Mendeliome v0.2259 MARS2 Zornitza Stark changed review comment from: 1 family with 2 sibs with combined oxidative phosphorylation deficiency-25 (with ID) with compound heterozygous mutations in the MARS2 gene. Patient fibroblasts showed decreased activities of mitochondrial complexes I and IV, consistent with a mitochondrial translation defect. Immunoblot analysis showed reduced MARS2 protein levels as well as reduced levels of selected subunits of complexes I and IV.; to: 1 family with 2 sibs with combined oxidative phosphorylation deficiency-25 (with ID) with compound heterozygous mutations in the MARS2 gene. Patient fibroblasts showed decreased activities of mitochondrial complexes I and IV, consistent with a mitochondrial translation defect. Immunoblot analysis showed reduced MARS2 protein levels as well as reduced levels of selected subunits of complexes I and IV. Spastic ataxia association: note complex chromosomal rearrangements rather than SNVs reported in group of 54 French Canadians.
Mendeliome v0.2253 NEBL Zornitza Stark Phenotypes for gene: NEBL were changed from to Hypertrophic cardiomyopathy; dilated cardiomyopathy
Mendeliome v0.2246 PAX1 Zornitza Stark changed review comment from: Note recent report of 6 individuals from three unrelated families with prominent immunological phenotype.; to: Note additional recent report of 6 individuals from three unrelated families with prominent immunological phenotype.
Mendeliome v0.2211 QRSL1 Zornitza Stark Phenotypes for gene: QRSL1 were changed from to Combined oxidative phosphorylation deficiency 40
Mendeliome v0.2208 QRSL1 Zornitza Stark reviewed gene: QRSL1: Rating: GREEN; Mode of pathogenicity: None; Publications: 26741492, 29440775, 30283131, 30642647; Phenotypes: Combined oxidative phosphorylation deficiency 40; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2208 PPCS Zornitza Stark Phenotypes for gene: PPCS were changed from to Cardiomyopathy, dilated, 2C, MIM# 618189
Mendeliome v0.2204 PPCS Zornitza Stark changed review comment from: Five individuals from two unrelated families reported with missense variants. Functional studies in yeast to demonstrate impact of the variants on protein but not aimed at establishing gene-disease causation.; to: Five individuals from two unrelated families reported with missense variants. Functional studies in yeast to demonstrate impact of the variants on protein and cardiac dysfunction observed in Drosophila model.
Mendeliome v0.2204 PPCS Zornitza Stark reviewed gene: PPCS: Rating: AMBER; Mode of pathogenicity: None; Publications: 29754768; Phenotypes: Cardiomyopathy, dilated, 2C, MIM# 618189; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.2204 PET117 Zornitza Stark gene: PET117 was added
gene: PET117 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PET117 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PET117 were set to 28386624
Phenotypes for gene: PET117 were set to Developmental delay; Regression; Complex IV deficiency
Review for gene: PET117 was set to RED
Added comment: Two siblings reported, some functional data. PET117 postulated to be a Complex IV assembly factor.
Sources: Expert list
Mendeliome v0.2203 NUP188 Zornitza Stark Phenotypes for gene: NUP188 were changed from microcephaly; ID; cataract to microcephaly; ID; cataract; structural brain abnormalities; hypoventilation
Mendeliome v0.2200 NUP188 Zornitza Stark edited their review of gene: NUP188: Added comment: Additional 6 unrelated individuals with bi-allelic LoF variants reported, promoted to Green.; Changed rating: GREEN; Changed publications: 32021605, 28726809, 32275884; Changed phenotypes: microcephaly, ID, cataract, structural brain abnormalities, hypoventilation
Mendeliome v0.2170 COX5A Zornitza Stark gene: COX5A was added
gene: COX5A was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: COX5A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COX5A were set to 2824752
Phenotypes for gene: COX5A were set to pulmonary arterial hypertension; lactic acidemia; failure to thrive; isolated complex IV deficiency
Review for gene: COX5A was set to RED
Added comment: Single family reported.
Sources: Expert list
Mendeliome v0.2044 MIR140 Zornitza Stark gene: MIR140 was added
gene: MIR140 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: MIR140 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MIR140 were set to 30804514; 31633310
Phenotypes for gene: MIR140 were set to Spondyloepiphyseal dysplasia, Nishimura type, MIM# 618618
Review for gene: MIR140 was set to GREEN
Added comment: Single clinical paper (30804514) reports variant in affected mother and child (de novo in mother) and in a separate unrelated female (de novo) with spondylo-epiphyseal dysplasia. Mouse model (21576357) deletion of gene causes impaired longitudinal bone growth. Separate mouse model studies by same authors as clinical paper above (30804514) showed phenotype of mice with same mutation in this gene consistent with the skeletal dysplasia features of patients with the n.24A-G mutation, suggestive of neomorphic effects (mutation produces both loss-of-function and gain-of-function effects.)
Sources: Expert Review
Mendeliome v0.2013 IL6ST Zornitza Stark changed review comment from: Also known as gp130. Two families with bi-allelic missense variants and immunological phenotype described initially. More recently, five individuals from three families reported with a more complex Stuve-Wiedemann-like phenotype reported, including skeletal dysplasia and neonatal lung dysfunction with additional features such as congenital thrombocytopenia, eczematoid dermatitis, renal abnormalities, and defective acute-phase response. These three families had bi-allelic LoF variants (nonsense and canonical splice site). Several mouse models support gene-disease association.
Sources: Expert list; to: Also known as gp130. Two families with bi-allelic missense variants and immunological phenotype described initially. More recently, five individuals from three families reported with a more complex Stuve-Wiedemann-like phenotype reported, including skeletal dysplasia and neonatal lung dysfunction with additional features such as congenital thrombocytopenia, eczematoid dermatitis, renal abnormalities, and defective acute-phase response. These three families had bi-allelic LoF variants (nonsense and canonical splice site). Several mouse models support gene-disease association.
2020: 12 individuals from 8 unrelated families with seven different mono-allelic truncating variants, dominant negative effect proposed.
Sources: Expert list
Mendeliome v0.1999 HAVCR2 Zornitza Stark gene: HAVCR2 was added
gene: HAVCR2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: HAVCR2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: HAVCR2 were set to 30374066; 30792187
Phenotypes for gene: HAVCR2 were set to T-cell lymphoma, subcutaneous panniculitis-like, MIM# 618398
Review for gene: HAVCR2 was set to GREEN
Added comment: Over 20 unrelated individuals reported, note germline confirmation in only a few. Some variants are recurrent: c.245A>G (p.Tyr82Cys) and c.291A>G (p.Ile97Met).
Sources: Expert list
Mendeliome v0.1997 TRIM22 Zornitza Stark gene: TRIM22 was added
gene: TRIM22 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: TRIM22 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TRIM22 were set to 26836588
Phenotypes for gene: TRIM22 were set to Inflammatory bowel disease
Review for gene: TRIM22 was set to GREEN
Added comment: Three unrelated families reported with bi-allelic variants in this gene, and very early onset IBD, some functional data.
Sources: Expert list
Mendeliome v0.1995 ALPI Zornitza Stark gene: ALPI was added
gene: ALPI was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ALPI was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ALPI were set to 29567797
Phenotypes for gene: ALPI were set to Inflammatory bowel disease
Review for gene: ALPI was set to AMBER
Added comment: Two unrelated individuals, some functional data.
Sources: Expert list
Mendeliome v0.1990 POLA1 Zornitza Stark Phenotypes for gene: POLA1 were changed from to Pigmentary disorder, reticulate, with systemic manifestations, X-linked, MIM# 301220; Van Esch-O'Driscoll syndrome OMIM# 301030
Mendeliome v0.1987 POLA1 Zornitza Stark reviewed gene: POLA1: Rating: GREEN; Mode of pathogenicity: None; Publications: 27019227, 31006512; Phenotypes: Pigmentary disorder, reticulate, with systemic manifestations, X-linked, MIM# 301220, Van Esch-O'Driscoll syndrome OMIM# 301030; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Mendeliome v0.1985 DBR1 Zornitza Stark gene: DBR1 was added
gene: DBR1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: DBR1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DBR1 were set to 29474921
Phenotypes for gene: DBR1 were set to Viral infections of the brainstem
Review for gene: DBR1 was set to GREEN
Added comment: Seven individuals from three unrelated families with viral brainstem encephalitis and bi-allelic hypomorphic variants.
Sources: Expert list
Mendeliome v0.1974 IFNAR1 Zornitza Stark gene: IFNAR1 was added
gene: IFNAR1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: IFNAR1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: IFNAR1 were set to 31270247
Phenotypes for gene: IFNAR1 were set to Severe disease caused by Yellow Fever vaccine and Measles vaccine
Review for gene: IFNAR1 was set to AMBER
Added comment: Two unrelated individuals reported with bi-allelic LoF variants, some functional data.
Sources: Expert list
Mendeliome v0.1965 JAK1 Zornitza Stark changed review comment from: Single family reported (mother and two children) with GoF variant.
Sources: Expert list; to: Single family reported (mother and two children) with GoF variant and immune dysregulation phenotype. Another individual reported with bi-allelic LoF and susceptibility to mycobacterial infections. Mouse model with NK defect.
Sources: Expert list
Mendeliome v0.1964 SPPL2A Zornitza Stark gene: SPPL2A was added
gene: SPPL2A was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SPPL2A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SPPL2A were set to 30127434
Phenotypes for gene: SPPL2A were set to Susceptibility to mycobacteria and Salmonella
Review for gene: SPPL2A was set to AMBER
Added comment: Three individuals from two unrelated consanguineous family with two different homozygous splice site variants, functional data.
Sources: Expert list
Mendeliome v0.1955 MKL1 Zornitza Stark gene: MKL1 was added
gene: MKL1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MKL1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MKL1 were set to 32128589; 26224645
Phenotypes for gene: MKL1 were set to Neutropaenia with combined immune deficiency
Review for gene: MKL1 was set to AMBER
Added comment: Two unrelated families reported.
Sources: Expert list
Mendeliome v0.1952 SMARCD2 Zornitza Stark gene: SMARCD2 was added
gene: SMARCD2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SMARCD2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SMARCD2 were set to 28369036; 28369034
Phenotypes for gene: SMARCD2 were set to Specific granule deficiency 2, MIM# 617475; Neutropaenia; Neurodevelopmental abnormalities in some; Myelodysplasia
Review for gene: SMARCD2 was set to GREEN
Added comment: Three unrelated families and functional data.
Sources: Expert list
Mendeliome v0.1950 TNFRSF9 Zornitza Stark gene: TNFRSF9 was added
gene: TNFRSF9 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: TNFRSF9 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TNFRSF9 were set to 30872117; 31501153
Phenotypes for gene: TNFRSF9 were set to EBV lymphoproliferation; B-cell lymphoma; Chronic active EBV infection
Review for gene: TNFRSF9 was set to GREEN
Added comment: Six unrelated individuals, two with same homozygous G109S missense variant, functional data.
Sources: Expert list
Mendeliome v0.1933 TOP2B Zornitza Stark changed review comment from: Association with deafness: One multigenerational family where variant in this gene segregated; two additional variants identified in a cohort; supportive animal model data.
Association with immunological phenotypes: Four individuals from three unrelated families reported, all the variants affected the TOPRIM domain, functional data including mouse model.
Sources: Literature; to: Association with deafness: One multigenerational family where variant in this gene segregated; two additional variants identified in a cohort; supportive animal model data.
Association with immunological phenotypes: Four individuals from three unrelated families reported, all the variants affected the TOPRIM domain, functional data including mouse model.
Intellectual disability: two unrelated individuals reported with same de novo variant, c.187C > T, p.(His63Tyr) and also supportive mouse model data.
Sources: Literature
Mendeliome v0.1932 TOP2B Zornitza Stark changed review comment from: One multigenerational family where variant in this gene segregated; two additional variants identified in a cohort; supportive animal model data.
Sources: Literature; to: Association with deafness: One multigenerational family where variant in this gene segregated; two additional variants identified in a cohort; supportive animal model data.
Association with immunological phenotypes: Four individuals from three unrelated families reported, all the variants affected the TOPRIM domain, functional data including mouse model.
Sources: Literature
Mendeliome v0.1931 SLC39A7 Zornitza Stark gene: SLC39A7 was added
gene: SLC39A7 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SLC39A7 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC39A7 were set to 30718914
Phenotypes for gene: SLC39A7 were set to Antibody deficiency; early onset infections; blistering dermatosis; failure to thrive; thrombocytopaenia
Review for gene: SLC39A7 was set to GREEN
Added comment: Five unrelated families with hypomorphic variants and a mouse model recapitulating phenotype.
Sources: Expert list
Mendeliome v0.1929 NFE2L2 Zornitza Stark gene: NFE2L2 was added
gene: NFE2L2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: NFE2L2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NFE2L2 were set to 29018201
Phenotypes for gene: NFE2L2 were set to Immunodeficiency, developmental delay, and hypohomocysteinemia, MIM# 617744; Recurrent respiratory and skin infection; Growth retardation; Developmental delay, borderline ID; White matter cerebral lesions
Review for gene: NFE2L2 was set to GREEN
Added comment: Four unrelated individuals reported.
Sources: Expert list
Mendeliome v0.1927 ERBIN Zornitza Stark gene: ERBIN was added
gene: ERBIN was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ERBIN was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ERBIN were set to 28126831
Phenotypes for gene: ERBIN were set to Recurrent respiratory infections; Susceptibility to S.aureus; Eczema; Hyperextensible joints; Scoliosis; Arterial dilatation in some
Review for gene: ERBIN was set to AMBER
Added comment: Single family and functional data.
Sources: Expert list
Mendeliome v0.1922 IL6R Zornitza Stark Phenotypes for gene: IL6R were changed from to Recurrent pyogenic infections, cold abscesses; High circulating IL-6 levels; High IgE
Mendeliome v0.1918 IL6R Zornitza Stark reviewed gene: IL6R: Rating: AMBER; Mode of pathogenicity: None; Publications: 31235509; Phenotypes: Recurrent pyogenic infections, cold abscesses, High circulating IL-6 levels, High IgE; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1914 FCHO1 Zornitza Stark gene: FCHO1 was added
gene: FCHO1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: FCHO1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FCHO1 were set to 32098969; 30822429
Phenotypes for gene: FCHO1 were set to Combined immunodeficiency; T cells: low, poor proliferation; B cells: normal number; Recurrent infections (viral, mycobacteria, bacterial, fungal); lymphoproliferation; Failure to thrive; Increased activation-induced T-cell death; Defective clathrin-mediated endocytosis
Review for gene: FCHO1 was set to GREEN
Added comment: More than 10 affected individuals with bi-allelic variants in this gene reported. Functional data.
Sources: Expert list
Mendeliome v0.1901 NSMCE2 Tiong Tan Added comment: Comment on list classification: Two unrelated women with good functional evidence; but no additional cases since 2014
Mendeliome v0.1900 NSMCE2 Tiong Tan gene: NSMCE2 was added
gene: NSMCE2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NSMCE2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NSMCE2 were set to 25105364
Phenotypes for gene: NSMCE2 were set to SECKEL SYNDROME 10
Penetrance for gene: NSMCE2 were set to Complete
Review for gene: NSMCE2 was set to AMBER
Added comment: Biallelic hypomorphic variants in two unrelated women with microcephalic primordial dwarfism, insulin-resistant diabetes, fatty liver, and hypertriglyceridemia developing in childhood; and primary gonadal failure. Good quality functional evidence. No additional confirmatory cases since 2014 publication
Sources: Literature
Mendeliome v0.1898 PLEKHA5 Zornitza Stark reviewed gene: PLEKHA5: Rating: AMBER; Mode of pathogenicity: None; Publications: 29805042; Phenotypes: cleft lip, cleft palate; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.1896 PLEKHA5 Tiong Tan gene: PLEKHA5 was added
gene: PLEKHA5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PLEKHA5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PLEKHA5 were set to 29805042
Phenotypes for gene: PLEKHA5 were set to cleft lip; cleft palate
Penetrance for gene: PLEKHA5 were set to Complete
Review for gene: PLEKHA5 was set to GREEN
Added comment: Sources: Literature
Mendeliome v0.1890 NEK10 Zornitza Stark gene: NEK10 was added
gene: NEK10 was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: NEK10 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NEK10 were set to 31959991
Phenotypes for gene: NEK10 were set to Primary ciliary dyskinesia; bronchiectasis
Review for gene: NEK10 was set to GREEN
Added comment: Nine individuals from 5 unrelated families, some functional data.
Sources: NHS GMS
Mendeliome v0.1888 PIGK Zornitza Stark gene: PIGK was added
gene: PIGK was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PIGK was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIGK were set to 32220290
Phenotypes for gene: PIGK were set to Intellectual disability; seizures; cerebellar atrophy
Review for gene: PIGK was set to GREEN
Added comment: 12 individuals from 9 unrelated families reported.
Sources: Literature
Mendeliome v0.1886 ADARB1 Zornitza Stark gene: ADARB1 was added
gene: ADARB1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ADARB1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ADARB1 were set to 32220291
Phenotypes for gene: ADARB1 were set to Intellectual disability; microcephaly; seizures
Review for gene: ADARB1 was set to GREEN
Added comment: Four unrelated individuals with bi-allelic variants in this gene.
Sources: Literature
Mendeliome v0.1876 DRP2 Zornitza Stark gene: DRP2 was added
gene: DRP2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: DRP2 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: DRP2 were set to 26227883; 11430802; 31217940; 22764250; 29473052
Phenotypes for gene: DRP2 were set to Charcot Marie Tooth, intermediate X-linked; HMSN
Review for gene: DRP2 was set to GREEN
Added comment: Three unrelated families, functional data.
Sources: Expert list
Mendeliome v0.1872 ERLIN1 Bryony Thompson gene: ERLIN1 was added
gene: ERLIN1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ERLIN1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ERLIN1 were set to 24482476
Phenotypes for gene: ERLIN1 were set to Spastic paraplegia 62 MIM#615681
Review for gene: ERLIN1 was set to GREEN
Added comment: Three unrelated consanguineous families with early onset pure HSP.
Sources: Expert list
Mendeliome v0.1857 CHD3 Zornitza Stark Added comment: Comment when marking as ready: Over 30 unrelated individuals reported.
Mendeliome v0.1842 PQBP1 Elena Savva reviewed gene: PQBP1: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID:31840929, 14634649, 20410308; Phenotypes: Renpenning syndrome; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.1815 PTCD3 Zornitza Stark gene: PTCD3 was added
gene: PTCD3 was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: PTCD3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PTCD3 were set to 30607703; 19427859
Phenotypes for gene: PTCD3 were set to Intellectual disability; optic atrophy; Leigh-like syndrome
Review for gene: PTCD3 was set to AMBER
Added comment: One compound heterozygote case and functional assays. Essential subunit of oxidative phosphorylation (OXPHOS) complexes.
Sources: NHS GMS
Mendeliome v0.1809 OXA1L Zornitza Stark gene: OXA1L was added
gene: OXA1L was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: OXA1L was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: OXA1L were set to 30201738; 16435202
Phenotypes for gene: OXA1L were set to Encephalopathy; hypotonia; developmental delay
Review for gene: OXA1L was set to AMBER
Added comment: Single family reported with biochemical and molecular analyses of patient skeletal muscle and fibroblasts. In vitro functional assays in human cell lines, Drosophila model, and yeast-based assays. Loss of function affects oxidative phosphorylation complexes IV and V.
Sources: NHS GMS
Mendeliome v0.1807 NSUN3 Zornitza Stark gene: NSUN3 was added
gene: NSUN3 was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: NSUN3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NSUN3 were set to 27356879
Phenotypes for gene: NSUN3 were set to combined mitochondrial respiratory chain complex deficiency
Review for gene: NSUN3 was set to AMBER
Added comment: A single compound heterozygous case. Patient-derived fibroblasts exhibited severe defects in mitochondrial translation that can be rescued by exogenous expression of NSun3. In vitro functional assays also conducted.
Sources: NHS GMS
Mendeliome v0.1802 MRPS14 Zornitza Stark edited their review of gene: MRPS14: Changed rating: AMBER; Changed phenotypes: Combined oxidative phosphorylation deficiency 38, MIM# 618378
Mendeliome v0.1798 IDH3A Zornitza Stark gene: IDH3A was added
gene: IDH3A was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: IDH3A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: IDH3A were set to 31012789; 30478029; 30058936; 28412069
Phenotypes for gene: IDH3A were set to Retinitis pigmentosa
Review for gene: IDH3A was set to GREEN
Added comment: Six unrelated families reported with retinitis pigmentosa. Mouse model.
Sources: NHS GMS
Mendeliome v0.1781 TFAM Zornitza Stark gene: TFAM was added
gene: TFAM was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: TFAM was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TFAM were set to 27448789; 29021295; 9500544
Phenotypes for gene: TFAM were set to Mitochondrial DNA depletion syndrome 15 (hepatocerebral type) MIM#617156
Review for gene: TFAM was set to AMBER
Added comment: One consanguineous family segregates a homozygous variant. Tfam knockout mouse has a mitochondrial cardiomyopathy phenotype and severe mtDNA depletion with abolished oxidative phosphorylation.
Sources: NHS GMS
Mendeliome v0.1777 TIMMDC1 Zornitza Stark gene: TIMMDC1 was added
gene: TIMMDC1 was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: TIMMDC1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TIMMDC1 were set to 28604674; 30981218
Phenotypes for gene: TIMMDC1 were set to Mitochondrial complex I deficiency, nuclear type 31 MIM#618251
Review for gene: TIMMDC1 was set to AMBER
Added comment: A deep intronic variant (c.597-1340A>G, only detectable by WGS) that causes a splicing aberration was identified in a homozygous state in 3 unrelated cases from different ethnic backgrounds. A patient with Leigh-like syndrome had a homozygous stopgain variant in PDHX and a homozygous stopgain variant in TIMMDC1 (p.Arg225*). The TIMMDC1 mutant protein could still rescue complex I assembly in TIMMDC1 knockout cells and the patient’s clinical phenotype was not clearly distinct from that of other patients with the same PDHX defect.
Sources: NHS GMS
Mendeliome v0.1771 COX6A2 Zornitza Stark gene: COX6A2 was added
gene: COX6A2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: COX6A2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COX6A2 were set to 31155743; 23460811
Phenotypes for gene: COX6A2 were set to Mitochondrial complex IV deficiency, MIM# 220110
Review for gene: COX6A2 was set to GREEN
Added comment: Two unrelated families and two mouse models.
Sources: Expert list
Mendeliome v0.1766 ANXA11 Bryony Thompson gene: ANXA11 was added
gene: ANXA11 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ANXA11 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ANXA11 were set to 28469040; 29845112; 30109997
Phenotypes for gene: ANXA11 were set to Amytrophic lateral sclerosis 23 MIM#617839
Review for gene: ANXA11 was set to GREEN
Added comment: 4 different missense variants in 10 patients from 7 unrelated families with amyotrophic lateral sclerosis and functional assays supporting association.
Sources: Expert list
Mendeliome v0.1753 TXN2 Zornitza Stark Phenotypes for gene: TXN2 were changed from to Combined oxidative phosphorylation deficiency 29, MIM# 616811
Mendeliome v0.1749 TXN2 Zornitza Stark reviewed gene: TXN2: Rating: AMBER; Mode of pathogenicity: None; Publications: 26626369, 12529397; Phenotypes: Combined oxidative phosphorylation deficiency 29, MIM# 616811; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1749 TARS2 Zornitza Stark Phenotypes for gene: TARS2 were changed from to Combined oxidative phosphorylation deficiency 21, MIM# 615918
Mendeliome v0.1745 TARS2 Zornitza Stark reviewed gene: TARS2: Rating: AMBER; Mode of pathogenicity: None; Publications: 24827421, 26811336; Phenotypes: Combined oxidative phosphorylation deficiency 21, MIM# 615918; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1744 SLC25A32 Zornitza Stark gene: SLC25A32 was added
gene: SLC25A32 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: SLC25A32 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC25A32 were set to 26933868; 28443623
Phenotypes for gene: SLC25A32 were set to Exercise intolerance, riboflavin-responsive, MIM# 616839
Review for gene: SLC25A32 was set to GREEN
Added comment: Two unrelated families reported with functional data. Muscle biopsy showed ragged-red fibers and lipid storage mainly in type I oxidative fibers, small type II fibers, and poor immunostaining for succinate dehydrogenase (FAD-dependent mitochondrial respiratory chain complex II). Oral supplementation with riboflavin led to dramatic improvement in the clinical and biologic abnormalities.
Sources: Expert list
Mendeliome v0.1725 ISCA1 Zornitza Stark gene: ISCA1 was added
gene: ISCA1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ISCA1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ISCA1 were set to 28356563; 32092383; 31016283; 30113620; 30105122
Phenotypes for gene: ISCA1 were set to Multiple mitochondrial dysfunctions syndrome 5, MIM# 617613
Review for gene: ISCA1 was set to GREEN
gene: ISCA1 was marked as current diagnostic
Added comment: Multiple unrelated families reported. Severe disorder characterised by progressive neurologic deterioration beginning in early infancy. Affected individuals have essentially no psychomotor development and have early-onset seizures with neurologic decline and spasticity. Brain imaging shows severe leukodystrophy with evidence of dys- or delayed myelination. Rat model results in early lethality. Founder variant c.259G > A, p.(Glu87Lys) reported in Indian families.
Sources: Expert list
Mendeliome v0.1706 SEMA6B Zornitza Stark gene: SEMA6B was added
gene: SEMA6B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SEMA6B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SEMA6B were set to 32169168
Phenotypes for gene: SEMA6B were set to Progressive myoclonic epilepsy
Mode of pathogenicity for gene: SEMA6B was set to Other
Review for gene: SEMA6B was set to GREEN
Added comment: Five individuals from unrelated families reported with de novo variants in the last exon, escaping NMD.
Sources: Literature
Mendeliome v0.1699 TNNI3K Zornitza Stark gene: TNNI3K was added
gene: TNNI3K was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: TNNI3K was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: TNNI3K were set to 30010057; 29355681
Phenotypes for gene: TNNI3K were set to Cardiac conduction disease with or without dilated cardiomyopathy, MIM# 616117
Review for gene: TNNI3K was set to GREEN
gene: TNNI3K was marked as current diagnostic
Added comment: At least 6 multigenerational families reported where variants segregated with disease.
Sources: Expert list
Mendeliome v0.1690 SUPT16H Zornitza Stark gene: SUPT16H was added
gene: SUPT16H was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SUPT16H was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SUPT16H were set to 31924697
Phenotypes for gene: SUPT16H were set to Intellectual disability; Abnormality of the corpus callosum
Review for gene: SUPT16H was set to GREEN
Added comment: Four unrelated individuals with de novo missense variants in this gene. Publication also reports on a deletion, but note this includes other genes and the individual also had another CNV.
Sources: Literature
Mendeliome v0.1684 TNR Zornitza Stark gene: TNR was added
gene: TNR was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TNR was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TNR were set to 32099069
Phenotypes for gene: TNR were set to Spastic para- or tetraparesis; Axial muscular hypotonia; Intellectual disability; Transient opisthotonus
Review for gene: TNR was set to GREEN
Added comment: 13 individuals from 8 unrelated families reported.
Sources: Literature
Mendeliome v0.1634 NKAP Zornitza Stark gene: NKAP was added
gene: NKAP was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: NKAP was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: NKAP were set to 26358559; 26350204; 31587868
Phenotypes for gene: NKAP were set to Intellectual disability
Review for gene: NKAP was set to GREEN
gene: NKAP was marked as current diagnostic
Added comment: 10 males from 8 unrelated families with missense mutations in NKAP (on Xq24) Hypotonia and tall stature with Marfanoid habitus was predominant phenotype. One variant (NM_024528:c.988G>A / p.Arg333Gln)
Sources: Expert list
Mendeliome v0.1604 SMC1A Zornitza Stark Mode of inheritance for gene: SMC1A was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1590 SMC1A Melanie Marty reviewed gene: SMC1A: Rating: GREEN; Mode of pathogenicity: None; Publications: 17273969, 22106055, 19701948, 26752331, 28166369; Phenotypes: Cornelia de Lange syndrome 2 300590; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1553 TMEM94 Zornitza Stark gene: TMEM94 was added
gene: TMEM94 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: TMEM94 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TMEM94 were set to 30526868
Phenotypes for gene: TMEM94 were set to Intellectual developmental disorder with cardiac defects and dysmorphic facies, MIM#618316
Review for gene: TMEM94 was set to GREEN
Added comment: 10 individuals from 6 unrelated families.
Sources: Expert list
Mendeliome v0.1508 RBM20 Zornitza Stark Phenotypes for gene: RBM20 were changed from to Cardiomyopathy, dilated, 1DD 613172 AD
Mendeliome v0.1505 RBM20 Zornitza Stark reviewed gene: RBM20: Rating: GREEN; Mode of pathogenicity: None; Publications: 30871351; Phenotypes: Cardiomyopathy, dilated, 1DD 613172 AD; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.1496 ZNF592 Chern Lim changed review comment from: No patients reported with ZNF592 variant that is clearly disease causing.

A 2010 paper published a biallelic missense variant segregating in one family with non-progressive, autosomal recessive, congenital cerebellar ataxia; however functional data not strongly supportive of pathogenicity (PMID: 20531441). Same authors later identified a homozygous WDR73 variant in that family which explains the phenotype (PMID: 26123727).; to: No patients reported with ZNF592 variant that is clearly disease causing.

A 2010 paper published a biallelic missense variant segregating in one family with non-progressive, autosomal recessive, congenital cerebellar ataxia; however functional data not strongly conclusive for pathogenicity (PMID: 20531441). Same authors later identified a homozygous WDR73 variant in that family which explains the phenotype (PMID: 26123727).
Mendeliome v0.1496 COL2A1 Zornitza Stark Phenotypes for gene: COL2A1 were changed from to Achondrogenesis, type II or hypochondrogenesis 200610; Avascular necrosis of the femoral head 608805; Czech dysplasia 609162; Epiphyseal dysplasia, multiple, with myopia and deafness 132450; Kniest dysplasia 156550; Legg-Calve-Perthes disease 150600; Osteoarthritis with mild chondrodysplasia 604864; Platyspondylic skeletal dysplasia, Torrance type 151210; SED congenita 183900; SMED Strudwick type 184250; Spondyloepiphyseal dysplasia, Stanescu type 616583; Spondyloperipheral dysplasia 271700; Stickler sydrome, type I, nonsyndromic ocular 609508; Stickler syndrome, type I 108300; Vitreoretinopathy with phalangeal epiphyseal dysplasia
Mendeliome v0.1473 COL2A1 Elena Savva reviewed gene: COL2A1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 15895462, 17721977, 27234559, 20179744; Phenotypes: Achondrogenesis, type II or hypochondrogenesis 200610, Avascular necrosis of the femoral head 608805, Czech dysplasia 609162, Epiphyseal dysplasia, multiple, with myopia and deafness 132450, Kniest dysplasia 156550, Legg-Calve-Perthes disease 150600, Osteoarthritis with mild chondrodysplasia 604864, Platyspondylic skeletal dysplasia, Torrance type 151210, SED congenita 183900, SMED Strudwick type 184250, Spondyloepiphyseal dysplasia, Stanescu type 616583, Spondyloperipheral dysplasia 271700, Stickler sydrome, type I, nonsyndromic ocular 609508, Stickler syndrome, type I 108300, Vitreoretinopathy with phalangeal epiphyseal dysplasia; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes
Mendeliome v0.1443 ARSG Zornitza Stark gene: ARSG was added
gene: ARSG was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ARSG was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ARSG were set to 29300381; 20679209; 25452429; 26975023
Phenotypes for gene: ARSG were set to Usher syndrome, type IV, MIM# 618144
Review for gene: ARSG was set to RED
Added comment: Atypical late-onset RP/HL phenotype described in 5 individuals from three Yemenite Jewish families. Same homozygous missense variant identified in all, founder effect. Animal models associated with neuronal ceroid lipofuscinosis.
Sources: Expert list
Mendeliome v0.1436 FXR1 Bryony Thompson gene: FXR1 was added
gene: FXR1 was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: FXR1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FXR1 were set to 30770808
Phenotypes for gene: FXR1 were set to Congenital multi-minicore myopathy
Review for gene: FXR1 was set to GREEN
Added comment: Two unrelated families and a mouse model with non-lethal myopathy phenotype.
Sources: NHS GMS
Mendeliome v0.1432 HTRA1 Zornitza Stark Phenotypes for gene: HTRA1 were changed from to {Macular degeneration, age-related, 7}, 6101493; {Macular degeneration, age-related, neovascular type}, 610149; CARASIL syndrome, 600142; Cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 2, 616779
Mendeliome v0.1418 SYNE1 Zornitza Stark edited their review of gene: SYNE1: Added comment: Well established gene-disease association with Emery-Dreifuss muscular dystrophy (AD), and with recessive ataxia.
Distal arthrogryposis: three families reported with bi-allelic distal truncating variants in the KASH domain. This appears to be a specific genotype-phenotype correlation.; Changed rating: GREEN; Changed publications: 23352163, 27782104; Changed phenotypes: Arthrogryposis multiplex congenita, myogenic type, MIM# 618484, Emery-Dreifuss muscular dystrophy 4, autosomal dominant, MIM# 612998, Spinocerebellar ataxia, autosomal recessive 8, MIM# 610743; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.1418 PNPT1 Zornitza Stark Phenotypes for gene: PNPT1 were changed from to Combined oxidative phosphorylation deficiency 13 (MIM#614932); Deafness, autosomal recessive 70 (MIM#614934)
Mendeliome v0.1415 HTRA1 Elena Savva reviewed gene: HTRA1: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 29895533, 19387015; Phenotypes: {Macular degeneration, age-related, 7}, 6101493, {Macular degeneration, age-related, neovascular type}, 610149, CARASIL syndrome, 600142, Cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 2, 616779; Mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
Mendeliome v0.1415 PNPT1 Crystle Lee reviewed gene: PNPT1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID:31752325, PMID: 30244537, PMID: 28594066, PMID: 28645153; Phenotypes: Combined oxidative phosphorylation deficiency 13 (MIM#614932), Deafness, autosomal recessive 70 (MIM#614934); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1373 SOX3 Zornitza Stark Phenotypes for gene: SOX3 were changed from Mental retardation, X-linked, with isolated growth hormone deficiency, MIM#300123; Panhypopituitarism, X-linked, MIM#312000 to Mental retardation, X-linked, with isolated growth hormone deficiency, MIM#300123; Panhypopituitarism, X-linked, MIM#312000; XX male sex reversal
Mendeliome v0.1372 SOX3 Zornitza Stark edited their review of gene: SOX3: Changed phenotypes: Mental retardation, X-linked, with isolated growth hormone deficiency, MIM#300123, Panhypopituitarism, X-linked, MIM#312000, XX male sex reversal
Mendeliome v0.1372 SOX3 Zornitza Stark Phenotypes for gene: SOX3 were changed from to Mental retardation, X-linked, with isolated growth hormone deficiency, MIM#300123; Panhypopituitarism, X-linked, MIM#312000
Mendeliome v0.1368 SOX3 Zornitza Stark reviewed gene: SOX3: Rating: AMBER; Mode of pathogenicity: None; Publications: 29175558, 30125608, 12428212, 15800844; Phenotypes: Mental retardation, X-linked, with isolated growth hormone deficiency, MIM#300123, Panhypopituitarism, X-linked, MIM#312000; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Mendeliome v0.1358 ATRX Zornitza Stark Mode of inheritance for gene: ATRX was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1357 ATRX Elena Savva reviewed gene: ATRX: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Alpha-thalassemia myelodysplasia syndrome, somatic, Alpha-thalassemia/mental retardation syndrome, Mental retardation-hypotonic facies syndrome, X-linked; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1356 PTRHD1 Zornitza Stark gene: PTRHD1 was added
gene: PTRHD1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PTRHD1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PTRHD1 were set to 30398675; 27134041; 27753167; 29143421
Phenotypes for gene: PTRHD1 were set to Parkinsonism; Intellectual disability
Review for gene: PTRHD1 was set to GREEN
Added comment: Three unrelated families reported: two with homozygous missense variants; and one with truncating variant. Affected individuals have juvenile-onset parkinsonism and ID.
Sources: Expert list
Mendeliome v0.1346 PITRM1 Zornitza Stark gene: PITRM1 was added
gene: PITRM1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PITRM1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PITRM1 were set to 26697887; 29764912; 29383861
Phenotypes for gene: PITRM1 were set to Ataxia; Intellectual disability
Review for gene: PITRM1 was set to GREEN
gene: PITRM1 was marked as current diagnostic
Added comment: Three unrelated families reported with bi-allelic variants in this gene.
Sources: Expert list
Mendeliome v0.1344 CSGALNACT1 Tiong Tan gene: CSGALNACT1 was added
gene: CSGALNACT1 was added to Mendeliome. Sources: Expert Review,Literature
Mode of inheritance for gene: CSGALNACT1 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: CSGALNACT1 were set to Congenital disorders of glycosylation; skeletal dysplasia; advanced bone age
Review for gene: CSGALNACT1 was set to GREEN
Added comment: Two unrelated families and functional studies
Sources: Expert Review, Literature
Mendeliome v0.1333 ELMO2 Zornitza Stark gene: ELMO2 was added
gene: ELMO2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ELMO2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ELMO2 were set to 27476657
Phenotypes for gene: ELMO2 were set to Vascular malformation, primary intraosseous, MIM#606893
Review for gene: ELMO2 was set to GREEN
Added comment: Five unrelated families reported.
Sources: Expert list
Mendeliome v0.1325 MAP3K20 Bryony Thompson gene: MAP3K20 was added
gene: MAP3K20 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MAP3K20 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MAP3K20 were set to 27816943; 26755636
Phenotypes for gene: MAP3K20 were set to Centronuclear myopathy 6 with fiber-type disproportion MIM#617760; Split-foot malformation with mesoaxial polydactyly MIM#616890
Review for gene: MAP3K20 was set to GREEN
Added comment: 3 unrelated consanguineous families homozygous for 3 different variants with centronuclear myopathy, and at least 2 families reported with split-foot malformation. Null mouse model is embryonic lethal due to severe cardiac edema and growth retardation. Gene alias of ZAK used in the published studies.
Sources: Expert list
Mendeliome v0.1275 IQSEC2 Zornitza Stark Mode of inheritance for gene: IQSEC2 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1274 IQSEC2 Elena Savva reviewed gene: IQSEC2: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 31415821, 20473311, 30842726; Phenotypes: Mental retardation, X-linked 1/78; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.1258 TRAPPC4 Zornitza Stark gene: TRAPPC4 was added
gene: TRAPPC4 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: TRAPPC4 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TRAPPC4 were set to 31794024
Phenotypes for gene: TRAPPC4 were set to intellectual disability; epilepsy; spasticity; microcephaly
Review for gene: TRAPPC4 was set to GREEN
Added comment: Seven individuals from three unrelated families reported; recurrent splice site variant (hg19:chr11:g.118890966A>G; TRAPPC4: NM_016146.5; c.454+3A>G), not a founder variant.
Sources: Expert Review
Mendeliome v0.1256 SNX27 Zornitza Stark gene: SNX27 was added
gene: SNX27 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: SNX27 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SNX27 were set to 25894286; 31721175; 21300787; 23524343
Phenotypes for gene: SNX27 were set to intellectual disability; seizures
Review for gene: SNX27 was set to GREEN
Added comment: Three unrelated families and animal model.
Sources: Expert Review
Mendeliome v0.1252 KAT8 Zornitza Stark gene: KAT8 was added
gene: KAT8 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KAT8 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KAT8 were set to 31794431
Phenotypes for gene: KAT8 were set to Intellectual disability; seizures; autism; dysmorphic features
Review for gene: KAT8 was set to GREEN
Added comment: Eight unrelated individuals reported with de novo variants in this gene and a mouse model. All variants missense, in the chromobarrel domain or the acetyltransferase domain; three individuals had the same variant p.Tyr90Cys . One more individual reported with bi-allelic variants: one missense and one frameshift; carrier parents were normal suggesting that may be haploinsuffiency is not the mechanism.
Sources: Literature
Mendeliome v0.1232 ACTB Sebastian Lunke Phenotypes for gene: ACTB were changed from to Baraitser-Winter syndrome 1 243310; ACTB-related neurodevelopment disorder
Mendeliome v0.1220 ACTB Melanie Marty reviewed gene: ACTB: Rating: GREEN; Mode of pathogenicity: Other; Publications: 29220674; Phenotypes: ?Dystonia, juvenile-onset 607371, Baraitser-Winter syndrome 1 243310, ACTB-related neurodevelopment disorder; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes
Mendeliome v0.1216 MRPS7 Zornitza Stark Phenotypes for gene: MRPS7 were changed from to Combined oxidative phosphorylation deficiency 34, MIM# 617872
Mendeliome v0.1212 MRPS7 Zornitza Stark reviewed gene: MRPS7: Rating: RED; Mode of pathogenicity: None; Publications: 25556185; Phenotypes: Combined oxidative phosphorylation deficiency 34, MIM# 617872; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1206 MRPL12 Zornitza Stark Phenotypes for gene: MRPL12 were changed from to Growth retardation; neurological deterioration; mitochondrial translation deficiency
Mendeliome v0.1204 MRPL12 Zornitza Stark reviewed gene: MRPL12: Rating: RED; Mode of pathogenicity: None; Publications: 23603806; Phenotypes: Growth retardation, neurological deterioration, mitochondrial translation deficiency; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1204 LYRM4 Zornitza Stark Phenotypes for gene: LYRM4 were changed from to Combined oxidative phosphorylation deficiency 19, MIM# 615595
Mendeliome v0.1200 LYRM4 Zornitza Stark reviewed gene: LYRM4: Rating: AMBER; Mode of pathogenicity: None; Publications: 23814038, 31497476; Phenotypes: Combined oxidative phosphorylation deficiency 19, MIM# 615595; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1189 PHEX Zornitza Stark Mode of inheritance for gene: PHEX was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1188 PHEX Zornitza Stark reviewed gene: PHEX: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Hypophosphatemic rickets, MIM#307800; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1174 TKFC Zornitza Stark gene: TKFC was added
gene: TKFC was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TKFC was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TKFC were set to 32004446
Phenotypes for gene: TKFC were set to Developmental delay; cataracts; liver dysfunction
Review for gene: TKFC was set to AMBER
Added comment: Two unrelated individuals reported.
Sources: Literature
Mendeliome v0.1172 RALGAPA1 Zornitza Stark gene: RALGAPA1 was added
gene: RALGAPA1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RALGAPA1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RALGAPA1 were set to 32004447
Phenotypes for gene: RALGAPA1 were set to Intellectual disability; hypotonia; infantile spasms.
Review for gene: RALGAPA1 was set to GREEN
Added comment: Four unrelated individuals reported.
Sources: Literature
Mendeliome v0.1150 DLG4 Zornitza Stark edited their review of gene: DLG4: Added comment: Four unrelated individuals reported.; Changed rating: GREEN; Changed publications: 27479843, 25123844, 19617690, 29460436, 23020937, 28135719; Changed phenotypes: Intellectual disability, Marfanoid habitus; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Set current diagnostic: yes
Mendeliome v0.1121 ACSL4 Zornitza Stark Mode of inheritance for gene: ACSL4 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1120 ACSL4 Zornitza Stark reviewed gene: ACSL4: Rating: GREEN; Mode of pathogenicity: None; Publications: 11889465, 12525535; Phenotypes: Mental retardation, X-linked 63, MIM# 300387 XLD; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1112 HUWE1 Zornitza Stark Mode of inheritance for gene: HUWE1 was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1111 FLNA Zornitza Stark Phenotypes for gene: FLNA were changed from to ?FG syndrome 2, XL; Cardiac valvular dysplasia, X-linked; Congenital short bowel syndrome; Frontometaphyseal dysplasia 1; Heterotopia, periventricular, 1; Intestinal pseudoobstruction, neuronal Melnick-Needles syndrome; Otopalatodigital syndrome, type I; Otopalatodigital syndrome, type II; Terminal osseous dysplasia
Mendeliome v0.1109 FLNA Zornitza Stark Mode of inheritance for gene: FLNA was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1069 HUWE1 Elena Savva reviewed gene: HUWE1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 30797980, 29180823; Phenotypes: Mental retardation, X-linked syndromic, Turner type, Say-Meyer syndrome; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1069 FLNA Elena Savva reviewed gene: FLNA: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 30089473; Phenotypes: ?FG syndrome 2, XL, Cardiac valvular dysplasia, X-linked, Congenital short bowel syndrome, Frontometaphyseal dysplasia 1, Heterotopia, periventricular, 1, Intestinal pseudoobstruction, neuronal Melnick-Needles syndrome, Otopalatodigital syndrome, type I, Otopalatodigital syndrome, type II, Terminal osseous dysplasia; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.1069 LIPE Kristin Rigbye gene: LIPE was added
gene: LIPE was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: LIPE was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LIPE were set to 27862896; 25475467; 24848981
Phenotypes for gene: LIPE were set to Lipodystrophy, familial partial, type 6, 615980
Review for gene: LIPE was set to GREEN
gene: LIPE was marked as current diagnostic
Added comment: LIPE is confirmed to be associated with partial familial lipodystrophy in OMIM.
There are 3 unrelated cases of patients with partial lipodystrophy with different loss of function variants in the LIPE gene.
Sources: Expert list
Mendeliome v0.1023 FBXW11 Alison Yeung gene: FBXW11 was added
gene: FBXW11 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FBXW11 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: FBXW11 were set to PMID: 31402090
Phenotypes for gene: FBXW11 were set to Intellectual disability; developmental eye anomalies; digital anomalies
Review for gene: FBXW11 was set to GREEN
Added comment: Reported in >3 unrelated individuals
Functional studies in zebrafish
Sources: Literature
Mendeliome v0.1020 ANAPC1 Alison Yeung gene: ANAPC1 was added
gene: ANAPC1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ANAPC1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: ANAPC1 were set to PMID: 31303264
Phenotypes for gene: ANAPC1 were set to Rothmund Thomson syndrome type 1, OMIM 618625
Review for gene: ANAPC1 was set to GREEN
gene: ANAPC1 was marked as current diagnostic
Added comment: 7 unrelated families reported
Sources: Literature
Mendeliome v0.1018 RINT1 Alison Yeung gene: RINT1 was added
gene: RINT1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RINT1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RINT1 were set to PMID: 31204009
Phenotypes for gene: RINT1 were set to Recurrent acute liver failure
Review for gene: RINT1 was set to GREEN
gene: RINT1 was marked as current diagnostic
Added comment: three unrelated individuals reported
Sources: Literature
Mendeliome v0.991 CTBP1 Zornitza Stark gene: CTBP1 was added
gene: CTBP1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: CTBP1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CTBP1 were set to 27094857; 28955726; 31041561
Phenotypes for gene: CTBP1 were set to Hypotonia, ataxia, developmental delay, and tooth enamel defect syndrome, MIM#617915
Review for gene: CTBP1 was set to GREEN
gene: CTBP1 was marked as current diagnostic
Added comment: At least 12 unrelated individuals reported with this neurodevelopmental disorder.
Sources: Expert list
Mendeliome v0.981 CCDC47 Sebastian Lunke gene: CCDC47 was added
gene: CCDC47 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: CCDC47 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CCDC47 were set to 30401460
Phenotypes for gene: CCDC47 were set to Trichohepatoneurodevelopmental syndrome, 618268
Review for gene: CCDC47 was set to GREEN
gene: CCDC47 was marked as current diagnostic
Added comment: From GEL: Morimoto el al. (PMID: 30401460) report on 4 individuals from 4 unrelated families with biallelic LoF variants in CCDC47. The phenotype consisted of abnormal (woolly) hair, liver dysfunction, common facial features as well as DD/ID
Sources: Expert list
Mendeliome v0.975 IKZF5 Zornitza Stark gene: IKZF5 was added
gene: IKZF5 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: IKZF5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IKZF5 were set to 31217188
Phenotypes for gene: IKZF5 were set to Thrombocytopaenia
Review for gene: IKZF5 was set to GREEN
Added comment: Five unrelated individuals with missense variants in this gene. Two de novo, three segregated with disease
Sources: Expert Review
Mendeliome v0.973 TTC12 Zornitza Stark gene: TTC12 was added
gene: TTC12 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TTC12 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TTC12 were set to 31978331
Phenotypes for gene: TTC12 were set to Ciliary dyskinesia
Review for gene: TTC12 was set to GREEN
Added comment: Four unrelated families reported, LoF variants, respiratory phenotype.
Sources: Literature
Mendeliome v0.965 STT3B Zornitza Stark Phenotypes for gene: STT3B were changed from to Congenital disorder of glycosylation, type Ix 615597
Mendeliome v0.963 STT3B Zornitza Stark reviewed gene: STT3B: Rating: RED; Mode of pathogenicity: None; Publications: 23842455; Phenotypes: Congenital disorder of glycosylation, type Ix 615597; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.963 SLC39A8 Zornitza Stark Phenotypes for gene: SLC39A8 were changed from to Congenital disorder of glycosylation, type IIn , MIM#16721
Mendeliome v0.959 PIGS Zornitza Stark gene: PIGS was added
gene: PIGS was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: PIGS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIGS were set to 30269814
Phenotypes for gene: PIGS were set to Glycosylphosphatidylinositol biosynthesis defect 18 618143
Review for gene: PIGS was set to GREEN
Added comment: Three unrelated families reported. Severe neurological phenotype ranging from fetal akinesia to ID/EE
Sources: Expert Review
Mendeliome v0.957 FUK Zornitza Stark gene: FUK was added
gene: FUK was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FUK was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FUK were set to 30503518
Phenotypes for gene: FUK were set to Congenital disorder of glycosylation with defective fucosylation 2, MIM# 618324
Review for gene: FUK was set to AMBER
Added comment: Two unrelated individuals reported.
Sources: Literature
Mendeliome v0.955 ZNF142 Zornitza Stark gene: ZNF142 was added
gene: ZNF142 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ZNF142 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZNF142 were set to 31036918
Phenotypes for gene: ZNF142 were set to Neurodevelopmental disorder with impaired speech and hyperkinetic movements, MIM#618425
Review for gene: ZNF142 was set to GREEN
gene: ZNF142 was marked as current diagnostic
Added comment: 7 individuals from 4 unrelated families reported.
Sources: Expert list
Mendeliome v0.953 RALA Zornitza Stark gene: RALA was added
gene: RALA was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: RALA was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RALA were set to 30500825
Phenotypes for gene: RALA were set to Intellectual disability; Seizures
Review for gene: RALA was set to GREEN
gene: RALA was marked as current diagnostic
Added comment: 11 individuals from 10 unrelated families reported with this neurodevelopmental syndrome, half had seizures.
Sources: Expert list
Mendeliome v0.939 HNRNPR Zornitza Stark gene: HNRNPR was added
gene: HNRNPR was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: HNRNPR was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: HNRNPR were set to 26795593; 31079900
Phenotypes for gene: HNRNPR were set to Intellectual disability; seizures
Review for gene: HNRNPR was set to GREEN
gene: HNRNPR was marked as current diagnostic
Added comment: Five unrelated individuals reported with de novo variants and a neurodevelopmental disorder.
Sources: Expert list
Mendeliome v0.912 DHPS Zornitza Stark gene: DHPS was added
gene: DHPS was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: DHPS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DHPS were set to 30661771
Phenotypes for gene: DHPS were set to Neurodevelopmental disorder with seizures and speech and walking impairment, MIM#618480
Review for gene: DHPS was set to GREEN
gene: DHPS was marked as current diagnostic
Added comment: 5 individuals from 4 unrelated families with biallelic pathogenic variants in DHPS, note one variant is recurrent (c.518A>G or p.Asn173Ser). The phenotype consisted of DD/ID (5/5), tone abnormalities (hypotonia/hypertonia/spasticity - 5/5), seizures (5/5 - in one case though unclear staring spells) with EEG abnormalities (5/5). Additionally most individuals displayed behavioral issues, or some common facial features
Sources: Expert list
Mendeliome v0.907 DDOST Zornitza Stark Phenotypes for gene: DDOST were changed from to Congenital disorder of glycosylation, type Ir, MIM# 614507
Mendeliome v0.903 DDOST Zornitza Stark reviewed gene: DDOST: Rating: AMBER; Mode of pathogenicity: None; Publications: 22305527; Phenotypes: Congenital disorder of glycosylation, type Ir, MIM# 614507; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.901 PIK3C2A Zornitza Stark gene: PIK3C2A was added
gene: PIK3C2A was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: PIK3C2A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PIK3C2A were set to 31034465
Phenotypes for gene: PIK3C2A were set to Oculoskeletodental syndrome, MIM# 618440
Review for gene: PIK3C2A was set to GREEN
gene: PIK3C2A was marked as current diagnostic
Added comment: Three unrelated consanguineous families reported.
Sources: Expert list
Mendeliome v0.888 MTHFS Zornitza Stark gene: MTHFS was added
gene: MTHFS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MTHFS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MTHFS were set to 30031689; 31844630; 22303332
Phenotypes for gene: MTHFS were set to Neurodevelopmental disorder with microcephaly, epilepsy, and hypomyelination, 618367
Review for gene: MTHFS was set to GREEN
Added comment: Three unrelated individuals reported with supporting biochemical evidence.
Sources: Literature
Mendeliome v0.876 CDH2 Zornitza Stark gene: CDH2 was added
gene: CDH2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CDH2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CDH2 were set to 31585109
Phenotypes for gene: CDH2 were set to Intellectual disability; corpus callosum abnormalities; congenital abnormalities
Review for gene: CDH2 was set to GREEN
Added comment: Nine unrelated individuals reported with de novo variants in this gene.
Sources: Literature
Mendeliome v0.870 RPL13 Zornitza Stark gene: RPL13 was added
gene: RPL13 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RPL13 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RPL13 were set to 31630789
Phenotypes for gene: RPL13 were set to Spondyloepimetaphyseal Dysplasia with Severe Short Stature
Review for gene: RPL13 was set to GREEN
Added comment: Four unrelated individuals reported with de novo variants.
Sources: Literature
Mendeliome v0.865 TUBGCP2 Zornitza Stark gene: TUBGCP2 was added
gene: TUBGCP2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TUBGCP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TUBGCP2 were set to 31630790
Phenotypes for gene: TUBGCP2 were set to Lissencephaly; pachygyria; subcortical band heterotopia; microcephaly; intellectual disability
Review for gene: TUBGCP2 was set to GREEN
Added comment: Four unrelated families reported.
Sources: Literature
Mendeliome v0.860 TP73 Alison Yeung gene: TP73 was added
gene: TP73 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TP73 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TP73 were set to PMID: 31130284
Phenotypes for gene: TP73 were set to Cortical malformation; Lissencephaly
Review for gene: TP73 was set to AMBER
Added comment: Two unrelated families reported. No functional data
Sources: Literature
Mendeliome v0.858 SMG8 Alison Yeung gene: SMG8 was added
gene: SMG8 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SMG8 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SMG8 were set to PMID: 31130284
Phenotypes for gene: SMG8 were set to Intellectual disability
Review for gene: SMG8 was set to AMBER
Added comment: Two unrelated families reported. No functional data
Sources: Literature
Mendeliome v0.856 IQSEC3 Alison Yeung gene: IQSEC3 was added
gene: IQSEC3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IQSEC3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: IQSEC3 were set to PMID: 31130284
Phenotypes for gene: IQSEC3 were set to Intellectual disability
Review for gene: IQSEC3 was set to AMBER
Added comment: Two unrelated families reported, no functional data
Sources: Literature
Mendeliome v0.854 ICE1 Alison Yeung gene: ICE1 was added
gene: ICE1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ICE1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ICE1 were set to PMID: 31130284
Phenotypes for gene: ICE1 were set to Intellectual disability, cerebral atrophy
Review for gene: ICE1 was set to AMBER
Added comment: Two unrelated families reported, no functional data
Sources: Literature
Mendeliome v0.852 EIF2A Alison Yeung gene: EIF2A was added
gene: EIF2A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: EIF2A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EIF2A were set to PMID: 31130284
Phenotypes for gene: EIF2A were set to Intellectual disability, epilepsy
Review for gene: EIF2A was set to AMBER
Added comment: reported in two unrelated families
Sources: Literature
Mendeliome v0.844 KCNN3 Alison Yeung gene: KCNN3 was added
gene: KCNN3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KCNN3 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: KCNN3 were set to PMID: 31155282
Phenotypes for gene: KCNN3 were set to Zimmermann-Laband syndrome 3; OMIM# 618658
Review for gene: KCNN3 was set to GREEN
gene: KCNN3 was marked as current diagnostic
Added comment: Three unrelated individuals reported
Sources: Literature
Mendeliome v0.837 CNOT1 Alison Yeung gene: CNOT1 was added
gene: CNOT1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CNOT1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: CNOT1 were set to PMID: 31006513
Phenotypes for gene: CNOT1 were set to Holoprosencephaly 12, with or without pancreatic agenesis; OMIM# 618500
Review for gene: CNOT1 was set to GREEN
gene: CNOT1 was marked as current diagnostic
Added comment: Reported in 3 unrelated individuals
Sources: Literature
Mendeliome v0.835 IQSEC1 Zornitza Stark gene: IQSEC1 was added
gene: IQSEC1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IQSEC1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: IQSEC1 were set to 31607425
Phenotypes for gene: IQSEC1 were set to Intellectual developmental disorder with short stature and behavioral abnormalities, MIM# 618687
Review for gene: IQSEC1 was set to GREEN
Added comment: Five individuals from two unrelated families reported, animal model data.
Sources: Literature
Mendeliome v0.830 GPC4 Alison Yeung reviewed gene: GPC4: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 30982611; Phenotypes: Keipert syndrome OMIM# 301026; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes
Mendeliome v0.828 LEMD2 Alison Yeung gene: LEMD2 was added
gene: LEMD2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LEMD2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: LEMD2 were set to PMID: 30905398
Phenotypes for gene: LEMD2 were set to progeroid disorder
Review for gene: LEMD2 was set to AMBER
Added comment: two reported unrelated individuals, limited functional evidence
Sources: Literature
Mendeliome v0.822 FAM149B1 Alison Yeung gene: FAM149B1 was added
gene: FAM149B1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FAM149B1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FAM149B1 were set to PMID: 30905400
Phenotypes for gene: FAM149B1 were set to Joubert; Ciliopathy
Review for gene: FAM149B1 was set to GREEN
gene: FAM149B1 was marked as current diagnostic
Added comment: Four unrelated families reported
Sources: Literature
Mendeliome v0.820 CARS Alison Yeung gene: CARS was added
gene: CARS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CARS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CARS were set to PMID: 30824121
Phenotypes for gene: CARS were set to Intellectual disability; microcephaly; brittle hair and nails
Added comment: Three reported unrelated families
Sources: Literature
Mendeliome v0.814 ADAMTS9 Zornitza Stark gene: ADAMTS9 was added
gene: ADAMTS9 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ADAMTS9 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ADAMTS9 were set to 30609407
Phenotypes for gene: ADAMTS9 were set to Nephronophthisis-Related Ciliopathy
Review for gene: ADAMTS9 was set to GREEN
Added comment: Two families reported with functional evidence
Sources: Literature
Mendeliome v0.807 BNC2 Zornitza Stark gene: BNC2 was added
gene: BNC2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: BNC2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: BNC2 were set to 31656805; 31051115
Phenotypes for gene: BNC2 were set to Lower urinary tract obstruction, congenital; OMIM #618612
Review for gene: BNC2 was set to GREEN
gene: BNC2 was marked as current diagnostic
Added comment: At least four unrelated families reported.
Sources: Expert list
Mendeliome v0.793 STN1 Zornitza Stark gene: STN1 was added
gene: STN1 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: STN1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: STN1 were set to 27432940
Phenotypes for gene: STN1 were set to Cerebroretinal microangiopathy with calcification and cysts 2, MIM#617341
Review for gene: STN1 was set to AMBER
Added comment: Two unrelated individuals reported.
Sources: Expert list
Mendeliome v0.790 JAM2 Zornitza Stark gene: JAM2 was added
gene: JAM2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: JAM2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: JAM2 were set to 31851307
Phenotypes for gene: JAM2 were set to Primary brain calcification
Review for gene: JAM2 was set to GREEN
Added comment: Three unrelated families with bi-allelic variants reported. The clinical phenotypes of the four patients included parkinsonism (3/4), dysarthria (3/4), seizures (1/4), and probable asymptomatic (1/4), with diverse onset ages.
Sources: Literature
Mendeliome v0.788 TDP2 Zornitza Stark gene: TDP2 was added
gene: TDP2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: TDP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TDP2 were set to 31410782; 30109272; 24658003
Phenotypes for gene: TDP2 were set to Spinocerebellar ataxia, autosomal recessive 23; OMIM #616949
Review for gene: TDP2 was set to GREEN
Added comment: ID is part of the phenotype: 4 families with 6 affected patients, with functional evidence.

1 family with 3 affected sibs with homozygous splice site mutation in the TDP2 gene. Patient cell extracts showed absence of the full-length TDP2 protein and absence of 5-prime TDP activity, consistent with a loss of function, although 3-prime TDP activity, conferred by TDP1, was normal. In addition, patient lymphoblastoid cells were hypersensitive to the TOP2 poison etoposide. The findings indicated impaired capacity for double-strand break repair.

1 unrelated Egyptian patient with a similar disorder was homozygous for a truncating mutation in the TDP2 gene

1 unrelated Caucasian patient with same homozygous splice site mutation in the TDP2 gene. Western blot analysis did not detect TDP2 protein in patient primary skin fibroblasts. Patient fibroblasts showed an inability to rapidly repair topoisomerase-induced DNA double-strand breaks in the nucleus and also showed a profound hypersensitivity to this type of DNA damage. Complementation of patient cells with recombinant human TDP2 restored normal rates of nuclear DSB repair.
Sources: Expert list
Mendeliome v0.786 TRMT1 Zornitza Stark gene: TRMT1 was added
gene: TRMT1 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: TRMT1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TRMT1 were set to 30289604; 26308914; 21937992
Phenotypes for gene: TRMT1 were set to Mental retardation, autosomal recessive 68; OMIM #618302
Review for gene: TRMT1 was set to GREEN
Added comment: 4 families reported:
-1 consanguineous Iranian family with 5 individuals with nonsyndromic moderate to severe impaired intellectual development.
-1 consanguineous Iranian family with 3 adult brothers with global developmental delay and moderately delayed intellectual development
-2 unrelated Pakistani families with 4 patients with impaired intellectual development.
All with homozygous mutations in the TRMT1 gene which segregated with the disorder in the families, but functional studies of the variants were not performed.
Sources: Expert list
Mendeliome v0.780 SLC9A7 Zornitza Stark gene: SLC9A7 was added
gene: SLC9A7 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: SLC9A7 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: SLC9A7 were set to 30335141
Phenotypes for gene: SLC9A7 were set to Intellectual developmental disorder, X-linked 108; OMIM #301024
Review for gene: SLC9A7 was set to AMBER
Added comment: 6 males from 2 unrelated families with hemizygous missense mutation in the SLC9A7 gene. The mutation segregated with the disorder in the family. In vitro functional expression studies in CHO cells (AP-1 cells) showed that the mutation caused decreased levels of protein expression and reduced oligosaccharide maturation/glycosylation compared to wildtype, indicating impaired posttranslational processing. Subcellular localization studies indicated that protein trafficking was unaffected by the mutation. However, examination of the trans-Golgi compartment suggested a gain-of-function effect and a perturbation of glycosylation of secretory cargo. Serum transferrin studies in 1 patient suggested a glycosylation defect.
Sources: Literature
Mendeliome v0.778 KIAA1161 Zornitza Stark gene: KIAA1161 was added
gene: KIAA1161 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: KIAA1161 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: KIAA1161 were set to 30656188; 30649222; 30460687; 29910000
Phenotypes for gene: KIAA1161 were set to Basal ganglia calcification, idiopathic, 7, autosomal recessive; OMIM #618317
Review for gene: KIAA1161 was set to GREEN
Added comment: Total 9 families, but no functional evidence:

12 patients from 6 unrelated Chinese families reported by Yao et al. (2018) and homozygous or compound heterozygous mutations in the MYORG gene. Functional studies of the variants and studies of patient cells were not performed, but the presence of nonsense mutations suggested a loss of function.

1 Chinese woman identified with homozygous nonsense mutation in the MYORG gene, segregated with the disorder in the family. Functional studies of the variant and studies of patient cells were not performed.

2 unrelated Middle Eastern families with homozygous mutations in the MYORG gene, which segregated with the disorder in the families. Functional studies of the variants were not performed.

4 sibs from one Turkish family with homozygous missense mutation in the MYORG gene, which segregated with the disorder in the family. Functional studies of the variant and studies of patient cells were not performed.
Sources: Literature
Mendeliome v0.748 STAG2 Zornitza Stark gene: STAG2 was added
gene: STAG2 was added to Mendeliome_VCGS. Sources: Other
Mode of inheritance for gene: STAG2 was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Publications for gene: STAG2 were set to 30765867; 28296084; 30447054; 29263825; 30158690
Phenotypes for gene: STAG2 were set to Mullegama-Klein-Martinez syndrome, MIM#301022
Review for gene: STAG2 was set to GREEN
Added comment: 12 unrelated families reported both males and females affected.
Sources: Other
Mendeliome v0.723 ITSN1 Zornitza Stark gene: ITSN1 was added
gene: ITSN1 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: ITSN1 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: ITSN1 were set to 29773874
Review for gene: ITSN1 was set to GREEN
Added comment: 3 unrelated families with rare ITSN1 variants and SRNS/CNS or SSNS.
Sources: Expert list
Mendeliome v0.717 DNASE2 Zornitza Stark gene: DNASE2 was added
gene: DNASE2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: DNASE2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DNASE2 were set to 29259162; 31775019
Phenotypes for gene: DNASE2 were set to Auto-inflammatory disorder; splenomegaly; glomerulonephritis; liver fibrosis; arthritis; HLH
Review for gene: DNASE2 was set to GREEN
Added comment: Inflammatory disorder characterized by splenomegaly, glomerulonephritis, liver fibrosis, circulating anti-DNA autoantibodies, and progressive arthritis. Three families and functional data.
Sources: Expert list
Mendeliome v0.703 AP2M1 Zornitza Stark gene: AP2M1 was added
gene: AP2M1 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: AP2M1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: AP2M1 were set to 31104773
Phenotypes for gene: AP2M1 were set to Intellectual developmental disorder 60 with seizures, MIM# 618587
Review for gene: AP2M1 was set to GREEN
Added comment: Four unrelated individuals reported, recurrent variant, NM_004068.3:c.508C>T or p.Arg170Trp.
Sources: Expert list
Mendeliome v0.671 C19orf70 Zornitza Stark gene: C19orf70 was added
gene: C19orf70 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: C19orf70 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: C19orf70 were set to 29618761; 27623147; 27485409
Phenotypes for gene: C19orf70 were set to Combined oxidative phosphorylation deficiency 37, MIM# 618329
Review for gene: C19orf70 was set to GREEN
Added comment: Three unrelated families reported. HGNC approved name MICOS13.
Sources: Expert list
Mendeliome v0.669 MIPEP Zornitza Stark gene: MIPEP was added
gene: MIPEP was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: MIPEP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MIPEP were set to 27799064
Phenotypes for gene: MIPEP were set to Combined oxidative phosphorylation deficiency 31, MIM# 617228
Review for gene: MIPEP was set to GREEN
Added comment: Four unrelated children reported.
Sources: Expert list
Mendeliome v0.668 MRPS14 Zornitza Stark gene: MRPS14 was added
gene: MRPS14 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: MRPS14 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MRPS14 were set to 30358850
Phenotypes for gene: MRPS14 were set to Combined oxidative phosphorylation deficiency 38, MIM# 618378
Review for gene: MRPS14 was set to RED
Added comment: Single individual reported, functional data.
Sources: Expert list
Mendeliome v0.667 PLEKHG2 Zornitza Stark gene: PLEKHG2 was added
gene: PLEKHG2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: PLEKHG2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PLEKHG2 were set to 26573021
Phenotypes for gene: PLEKHG2 were set to Leukodystrophy and acquired microcephaly with or without dystonia, MIM# 616763
Review for gene: PLEKHG2 was set to RED
Added comment: Five individuals from two unrelated families reported, same homozygous missense variant.
Sources: Expert list
Mendeliome v0.660 AIMP2 Zornitza Stark gene: AIMP2 was added
gene: AIMP2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: AIMP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: AIMP2 were set to 29215095
Phenotypes for gene: AIMP2 were set to Leukodystrophy, hypomyelinating, 17 618006
Review for gene: AIMP2 was set to RED
Added comment: Two apparently unrelated consanguineous families, however same homozygous variant identified in both. Affected individuals had early-onset multifocal seizures, spasticity, poor overall growth, and microcephaly (up to -10 SD). Brain imaging showed multiple abnormalities, including cerebral and cerebellar atrophy, thin corpus callosum, abnormal signals in the basal ganglia, and features suggesting hypo- or demyelination
Sources: Expert list
Mendeliome v0.658 TMEM63A Zornitza Stark gene: TMEM63A was added
gene: TMEM63A was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: TMEM63A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: TMEM63A were set to 31587869
Phenotypes for gene: TMEM63A were set to Leukodystrophy, hypomyelinating, 19, transient infantile, MIM# 618688
Review for gene: TMEM63A was set to GREEN
Added comment: Four unrelated families reported; in three individuals, the variant was de novo, and inherited from a deceased parent in the fourth.
Sources: Expert list
Mendeliome v0.652 H3F3B Zornitza Stark commented on gene: H3F3B: Elizabeth J Bhoj, H3F3A/B Consortium, Hakon H. Hakonarson.: Mutations In H3f3a And H3f3b Encoding Histone 3.3: Report Of 26 Patients With Neurodevelopmental And Congenital Manifestations. American Society of Human Genetics, Orlando, FL October 2017 Notes: Platform Presentation.
Mendeliome v0.649 ROBO4 Zornitza Stark gene: ROBO4 was added
gene: ROBO4 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: ROBO4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ROBO4 were set to 30455415
Phenotypes for gene: ROBO4 were set to bicuspid aortic valve; ascending aortic aneurysm; ascending aorta dilatation
Review for gene: ROBO4 was set to GREEN
Added comment: Two families, functional data, incomplete penetrance.
Sources: Literature
Mendeliome v0.638 RSRC1 Zornitza Stark gene: RSRC1 was added
gene: RSRC1 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: RSRC1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RSRC1 were set to 28640246; 29522154
Phenotypes for gene: RSRC1 were set to Intellectual developmental disorder, autosomal recessive 70, MIM# 618402
Review for gene: RSRC1 was set to AMBER
Added comment: Two unrelated families reported, 8 affected individuals.
Sources: Expert list
Mendeliome v0.636 METTL5 Zornitza Stark gene: METTL5 was added
gene: METTL5 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: METTL5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: METTL5 were set to 29302074; 31564433
Phenotypes for gene: METTL5 were set to Intellectual developmental disorder, autosomal recessive 72, MIM# 618665
Review for gene: METTL5 was set to GREEN
Added comment: Three unrelated families and animal model.
Sources: Expert list
Mendeliome v0.633 USP27X Zornitza Stark gene: USP27X was added
gene: USP27X was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: USP27X was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: USP27X were set to 25644381
Phenotypes for gene: USP27X were set to Mental retardation, X-linked 105, MIM#300984
Review for gene: USP27X was set to AMBER
Added comment: Four individuals from two unrelated families reported.
Sources: Expert list
Mendeliome v0.624 TRPM3 Zornitza Stark gene: TRPM3 was added
gene: TRPM3 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: TRPM3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: TRPM3 were set to 31278393
Phenotypes for gene: TRPM3 were set to Intellectual disability; epilepsy
Review for gene: TRPM3 was set to GREEN
Added comment: 8 unrelated individuals with de novo variants in this gene. Recurrent variant p.(Val837Met) identified in 7/8.
Sources: Literature
Mendeliome v0.610 PIGP Zornitza Stark gene: PIGP was added
gene: PIGP was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: PIGP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIGP were set to 31139695
Phenotypes for gene: PIGP were set to Epileptic encephalopathy, early infantile, 55, MIM# 617599
Review for gene: PIGP was set to AMBER
Added comment: Three individuals from two unrelated families reported.
Sources: Expert list
Mendeliome v0.608 NEUROD2 Zornitza Stark gene: NEUROD2 was added
gene: NEUROD2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: NEUROD2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: NEUROD2 were set to 30323019
Phenotypes for gene: NEUROD2 were set to Epileptic encephalopathy, early infantile, 72, MIM# 618374
Review for gene: NEUROD2 was set to GREEN
Added comment: Two unrelated individuals with de novo missense variants in this gene, animal model.
Sources: Expert list
Mendeliome v0.606 GOT2 Zornitza Stark gene: GOT2 was added
gene: GOT2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: GOT2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GOT2 were set to 31422819
Phenotypes for gene: GOT2 were set to Epileptic encephalopathy, early infantile, 82, MIM# 618721
Review for gene: GOT2 was set to GREEN
Added comment: Four individuals from three unrelated families reported. Treatment with pyridoxine and serine ameliorated the phenotype.
Sources: Expert list
Mendeliome v0.568 PIGQ Zornitza Stark gene: PIGQ was added
gene: PIGQ was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: PIGQ was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIGQ were set to 25558065; 24463883; 31148362
Phenotypes for gene: PIGQ were set to Epileptic encephalopathy, early infantile, 77, MIM# 618548
Review for gene: PIGQ was set to GREEN
Added comment: Three unrelated families reported.
Sources: Expert list
Mendeliome v0.563 PHACTR1 Zornitza Stark gene: PHACTR1 was added
gene: PHACTR1 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: PHACTR1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PHACTR1 were set to 30256902
Phenotypes for gene: PHACTR1 were set to Epileptic encephalopathy, early infantile, 70, MIM# 618298
Review for gene: PHACTR1 was set to GREEN
Added comment: Three unrelated individuals reported with de novo variants in this gene.
Sources: Expert list
Mendeliome v0.555 CPLX1 Zornitza Stark gene: CPLX1 was added
gene: CPLX1 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: CPLX1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CPLX1 were set to 26539891; 28422131
Phenotypes for gene: CPLX1 were set to Epileptic encephalopathy, early infantile, 63, MIM# 617976
Review for gene: CPLX1 was set to GREEN
Added comment: Five individuals from three unrelated families reported in larger neurodevelopmental cohorts.
Sources: Expert list
Mendeliome v0.553 RNF13 Zornitza Stark gene: RNF13 was added
gene: RNF13 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: RNF13 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RNF13 were set to 30595371
Phenotypes for gene: RNF13 were set to Epileptic encephalopathy, early infantile, 73, MIM# 618379
Mode of pathogenicity for gene: RNF13 was set to Other
Review for gene: RNF13 was set to GREEN
Added comment: Three unrelated individuals with de novo gain-of-function variants in this gene reported; severe neurodegenerative disorder, seizures are a prominent part of the phenotype.
Sources: Literature
Mendeliome v0.551 GLS Zornitza Stark gene: GLS was added
gene: GLS was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: GLS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GLS were set to 30575854; 30970188
Phenotypes for gene: GLS were set to Epileptic encephalopathy, early infantile, 71, MIM# 618328; Global developmental delay, progressive ataxia, and elevated glutamine, MIM# 618412
Review for gene: GLS was set to GREEN
Added comment: Three individuals from two unrelated families reported with early neonatal refractory seizures, structural brain abnormalities and oedema; significantly increased glutamine levels (PMID: 30575854).

Another three unrelated individuals described with compound het variants, one of which is a triplet expansion in the 5' UTR (PMID: 30970188).
Sources: Expert list
Mendeliome v0.549 CAD Zornitza Stark gene: CAD was added
gene: CAD was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: CAD was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CAD were set to 28007989; 25678555
Phenotypes for gene: CAD were set to Epileptic encephalopathy, early infantile, 50, MIM# 616457
Review for gene: CAD was set to GREEN
Added comment: Five individuals from four unrelated families reported, seizures are a prominent part of the phenotype of this progressive neurometabolic condition.
Sources: Expert list
Mendeliome v0.541 NADSYN1 Zornitza Stark gene: NADSYN1 was added
gene: NADSYN1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: NADSYN1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NADSYN1 were set to 31883644
Phenotypes for gene: NADSYN1 were set to Multiple congenital abnormalities; absent kidneys; cardiac; limb; vertebral
Review for gene: NADSYN1 was set to GREEN
Added comment: Five individuals from four unrelated families.
Sources: Literature
Mendeliome v0.536 UQCRFS1 Zornitza Stark gene: UQCRFS1 was added
gene: UQCRFS1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: UQCRFS1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: UQCRFS1 were set to 31883641
Phenotypes for gene: UQCRFS1 were set to Mitochondrial Complex III deficiency; lactic acidosis; fetal bradycardia; hypertrophic cardiomyopathy; alopecia totalis
Review for gene: UQCRFS1 was set to GREEN
Added comment: Two unrelated families reported plus functional evidence.
Sources: Literature
Mendeliome v0.532 WBP2 Zornitza Stark gene: WBP2 was added
gene: WBP2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: WBP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: WBP2 were set to 26881968
Phenotypes for gene: WBP2 were set to Deafness, autosomal recessive 107, MIM# 617639
Review for gene: WBP2 was set to AMBER
Added comment: Two unrelated families identified in a large cohort; supportive animal model data.
Sources: Expert list
Mendeliome v0.529 GRAP Zornitza Stark gene: GRAP was added
gene: GRAP was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: GRAP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GRAP were set to 30610177
Phenotypes for gene: GRAP were set to Deafness, autosomal recessive 114, MIM# 618456
Review for gene: GRAP was set to RED
Added comment: Two apparently unrelated Turkish families reported, however same homozygous missense variant, and SNP analysis indicated identity by descent.
Sources: Expert list
Mendeliome v0.519 PPIP5K2 Zornitza Stark gene: PPIP5K2 was added
gene: PPIP5K2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: PPIP5K2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PPIP5K2 were set to 29590114
Phenotypes for gene: PPIP5K2 were set to Deafness, autosomal recessive 100, MIM# 618422
Review for gene: PPIP5K2 was set to AMBER
Added comment: Two apparently unrelated families with multiple affecteds segregating a homozygous missense variant; mouse model.
Sources: Expert list
Mendeliome v0.507 AP1B1 Zornitza Stark gene: AP1B1 was added
gene: AP1B1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: AP1B1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: AP1B1 were set to 31630788; 31630791
Phenotypes for gene: AP1B1 were set to Intellectual disability; enteropathy; deafness; ichthyosis; keratoderma
Review for gene: AP1B1 was set to GREEN
Added comment: Four unrelated families with bi-allelic LoF variants in this gene.
Sources: Literature
Mendeliome v0.485 DMXL2 Zornitza Stark gene: DMXL2 was added
gene: DMXL2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: DMXL2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DMXL2 were set to 31688942; 30237576
Phenotypes for gene: DMXL2 were set to Epileptic encephalopathy, early infantile, 81, MIM# 618663
Review for gene: DMXL2 was set to GREEN
Added comment: Four unrelated families reported.
Sources: Literature
Mendeliome v0.479 EPS8L2 Zornitza Stark gene: EPS8L2 was added
gene: EPS8L2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: EPS8L2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EPS8L2 were set to 26282398; 23918390; 28281779
Phenotypes for gene: EPS8L2 were set to Deafness autosomal recessive 106, MIM# 617637
Review for gene: EPS8L2 was set to GREEN
Added comment: Two unrelated families and a mouse model.
Sources: Expert list
Mendeliome v0.471 KITLG Zornitza Stark Phenotypes for gene: KITLG were changed from to Deafness, autosomal dominant 69, unilateral or asymmetric, MIM# 616697
Mendeliome v0.469 KITLG Zornitza Stark reviewed gene: KITLG: Rating: AMBER; Mode of pathogenicity: None; Publications: 26522471; Phenotypes: Deafness, autosomal dominant 69, unilateral or asymmetric, MIM# 616697; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.460 SLC5A6 Zornitza Stark gene: SLC5A6 was added
gene: SLC5A6 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: SLC5A6 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC5A6 were set to 31754459; 27904971
Phenotypes for gene: SLC5A6 were set to Developmental delay; epilepsy; neurodegeneration
Review for gene: SLC5A6 was set to GREEN
Added comment: Two unrelated families reported, functional data and some evidence of response to treatment.
Sources: Literature
Mendeliome v0.440 COA7 Zornitza Stark gene: COA7 was added
gene: COA7 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: COA7 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COA7 were set to 29718187; 27683825
Phenotypes for gene: COA7 were set to Spinocerebellar ataxia, autosomal recessive, with axonal neuropathy 3, MIM#618387
Review for gene: COA7 was set to GREEN
Added comment: Five unrelated individuals reported with bi-allelic variants in this gene. Slowly progressive condition with variable onset, but at least three individuals presented at <5 years of age.
Sources: Expert list
Mendeliome v0.417 NDUFAF8 Zornitza Stark gene: NDUFAF8 was added
gene: NDUFAF8 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: NDUFAF8 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NDUFAF8 were set to 31866046
Phenotypes for gene: NDUFAF8 were set to Leigh syndrome
Review for gene: NDUFAF8 was set to GREEN
Added comment: Three unrelated individuals with bi-allelic variants in this gene; functional data. Beware recurrent deep intronic splicing variant.
Sources: Literature
Mendeliome v0.415 EEF1B2 Zornitza Stark gene: EEF1B2 was added
gene: EEF1B2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: EEF1B2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EEF1B2 were set to 31845318; 21937992
Phenotypes for gene: EEF1B2 were set to Intellectual disability
Review for gene: EEF1B2 was set to AMBER
Added comment: 5 individuals from two unrelated families described in the literature so far, no functional data but gene belongs to a family implicated in neurodevelopmental disorders.
Sources: Literature
Mendeliome v0.409 TBC1D8B Zornitza Stark Mode of inheritance for gene: TBC1D8B was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.408 TBC1D8B Zornitza Stark reviewed gene: TBC1D8B: Rating: GREEN; Mode of pathogenicity: None; Publications: 30661770; Phenotypes: Nephrotic syndrome, type 20, MIM# 301028; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Mendeliome v0.399 FLG2 Zornitza Stark gene: FLG2 was added
gene: FLG2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: FLG2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FLG2 were set to 29758285; 28884927; 29505760
Phenotypes for gene: FLG2 were set to Peeling skin syndrome 6, MIM# 618084
Review for gene: FLG2 was set to GREEN
Added comment: 3 unrelated families reported.
Sources: Literature
Mendeliome v0.386 NUP133 Zornitza Stark gene: NUP133 was added
gene: NUP133 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: NUP133 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NUP133 were set to 30179222
Phenotypes for gene: NUP133 were set to Nephrotic syndrome, type 18, MIM#618177
Review for gene: NUP133 was set to GREEN
Added comment: Two unrelated families with functional data.
Sources: Literature
Mendeliome v0.383 NUP85 Zornitza Stark gene: NUP85 was added
gene: NUP85 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: NUP85 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NUP85 were set to 30179222
Phenotypes for gene: NUP85 were set to Nephrotic syndrome, type 17, MIM#618176
Review for gene: NUP85 was set to GREEN
Added comment: Three unrelated families reported.
Sources: Literature
Mendeliome v0.370 KCNT2 Zornitza Stark gene: KCNT2 was added
gene: KCNT2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: KCNT2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KCNT2 were set to 29069600; 29740868
Phenotypes for gene: KCNT2 were set to Epileptic encephalopathy, early infantile, 57, MIM#617771; Developmental and epileptic encephalopathy
Review for gene: KCNT2 was set to GREEN
Added comment: Reviewed by E Palmer: Ambrosino et al described 2 unrelated females with de novo variants in KCNT2. The first patient had the variant p.(Arg190His) had with West syndrome followed by Lennox-Gastaut syndrome , the second patient had the variant p.(Arg190Pro) and DEE with migrating focal seizures. Both variants were absent gnomad and had supportive in silico support for pathogenicity. In an electrophisological model both KCNT2 R190P and KCNT2 R190H increased maximal current density and shifted toward more negative membrane potential values the activation curve of KCNT2 channels, consistent with gain of function effects. PMID: 29740868.

Gururaj et al describe one male with de novo variant in KCNT2 p. (Phe240Leu) and early infantile epileptic encephalopathy. he variant was absent gnomad and supportive evidence of pathogenicity This variant was electrophysiologically modelled and revealed that the variant resulted in a 'change in function' demonstrating unusual altered selectivity in KNa channels.PMID: 29069600.
Sources: Literature
Mendeliome v0.366 TASP1 Zornitza Stark gene: TASP1 was added
gene: TASP1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: TASP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TASP1 were set to 31209944; 31350873
Phenotypes for gene: TASP1 were set to Developmental delay; microcephaly; dysmorphic features; congenital abnormalities
Review for gene: TASP1 was set to GREEN
Added comment: Four unrelated families reported; two with founder mutation. Protein interacts with KMT2A and KMT2D. Another infant with a de novo missense variant reported in a single infant with multiple congenital abnormalities, insufficient evidence for mono allelic disease at present.
Sources: Literature
Mendeliome v0.365 FST Zornitza Stark gene: FST was added
gene: FST was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: FST was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: FST were set to 31215115
Phenotypes for gene: FST were set to Cleft lip and palate
Review for gene: FST was set to RED
Added comment: Single family reported.
Sources: Literature
Mendeliome v0.363 GDF11 Zornitza Stark gene: GDF11 was added
gene: GDF11 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: GDF11 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: GDF11 were set to 31215115
Phenotypes for gene: GDF11 were set to Cleft lip and palate
Review for gene: GDF11 was set to AMBER
Added comment: Cleft lip and palate, and rib and vertebral hypersegmentation in a single family. Mouse model.
Sources: Literature
Mendeliome v0.359 MICB Sebastian Lunke changed review comment from: This gene is included in a large number of publications as it plays an central role immunity (MAJOR HISTOCOMPATIBILITY COMPLEX CLASS I CHAIN-RELATED GENE B). However beyond a number of susceptibility associations, it does not appear to have been firmly associated with disease in patients.; to: This gene is included in a large number of publications as it plays an central role immunity (MAJOR HISTOCOMPATIBILITY COMPLEX CLASS I CHAIN-RELATED GENE B). However beyond a number of susceptibility associations, it does not appear to have been firmly associated with disease in patients.

https://ghr.nlm.nih.gov/gene/MICB#resources
Mendeliome v0.351 KLHL24 Tiong Tan Phenotypes for gene: KLHL24 were changed from Epidermolysis bullosa simplex, generalized, with scarring and hair loss OMIM#617294; dilated cardiomyopathy to Epidermolysis bullosa simplex, generalized, with scarring and hair loss OMIM#617294; dilated cardiomyopathy
Mendeliome v0.350 KLHL24 Tiong Tan Phenotypes for gene: KLHL24 were changed from to Epidermolysis bullosa simplex, generalized, with scarring and hair loss OMIM#617294; dilated cardiomyopathy
Mendeliome v0.347 KLHL24 Tiong Tan reviewed gene: KLHL24: Rating: GREEN; Mode of pathogenicity: None; Publications: 29779254, 30120936; Phenotypes: Epidermolysis bullosa simplex, generalized, with scarring and hair loss OMIM#617294, dilated cardiomyopathy; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.346 SLC12A2 Zornitza Stark gene: SLC12A2 was added
gene: SLC12A2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: SLC12A2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC12A2 were set to 30740830
Phenotypes for gene: SLC12A2 were set to Kilquist syndrome; deafness; intellectual disability; dysmorphic features; absent salivation
Review for gene: SLC12A2 was set to AMBER
Added comment: Single individual with bi-alllelic deletion described; mouse model recapitulated the phenotype.
Sources: Literature
Mendeliome v0.343 CSNK1E Zornitza Stark gene: CSNK1E was added
gene: CSNK1E was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: CSNK1E was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CSNK1E were set to 30488659
Phenotypes for gene: CSNK1E were set to Epileptic encephalopathy
Review for gene: CSNK1E was set to RED
Added comment: De novo splicing variant reported but in conjunction with STXBP1 variants; authors postulate it may contribute to susceptibility. Also reports linking variants in this gene to psychiatric disorders.
Sources: Literature
Mendeliome v0.338 DEGS1 Zornitza Stark gene: DEGS1 was added
gene: DEGS1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: DEGS1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DEGS1 were set to 30620338; 30620337
Phenotypes for gene: DEGS1 were set to Leukodystrophy, hypomyelinating, 18, MIM#618404
Review for gene: DEGS1 was set to GREEN
Added comment: 20 individuals from 14 unrelated families.
Sources: Literature
Mendeliome v0.333 ZMIZ1 Zornitza Stark gene: ZMIZ1 was added
gene: ZMIZ1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: ZMIZ1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ZMIZ1 were set to 30639322
Phenotypes for gene: ZMIZ1 were set to Neurodevelopmental disorder with dysmorphic facies and distal skeletal anomalies; OMIM #618659
Review for gene: ZMIZ1 was set to GREEN
Added comment: 19 unrelated individuals with heterozygous variants in this gene reported.
Sources: Literature
Mendeliome v0.331 VAMP2 Zornitza Stark gene: VAMP2 was added
gene: VAMP2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: VAMP2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: VAMP2 were set to 30929742
Phenotypes for gene: VAMP2 were set to Intellectual disability; Autism
Review for gene: VAMP2 was set to GREEN
Added comment: 5 unrelated patients with heterozygous de novo mutations in VAMP2, presenting with a neurodevelopmental disorder characterized by axial hypotonia, intellectual disability, and autistic features. Affected individuals carrying de novo non-synonymous variants involving the C-terminal region presented a more severe phenotype with additional neurological features, including central visual impairment, hyperkinetic movement disorder, and epilepsy or electroencephalography abnormalities. Reconstituted fusion involving a lipid-mixing assay indicated impairment in vesicle fusion as one of the possible associated disease mechanisms.
Sources: Literature
Mendeliome v0.326 TARS Zornitza Stark gene: TARS was added
gene: TARS was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: TARS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TARS were set to 31374204
Phenotypes for gene: TARS were set to Trichothiodystrophy 7, nonphotosensitive; OMIM #618546
Review for gene: TARS was set to AMBER
Added comment: Clinical features of trichothiodystrophy (TTD) include ichthyosis, intellectual disability, decreased fertility, short stature.

2 unrelated patients with non-photosensitive-TTD, in whom limited clinical information was available (one with DD): one compound heterozygous TARS variants, second homozygous for TARS variant. They showed that the variants had a profound effect on TARS protein stability and enzymatic function.
Sources: Literature
Mendeliome v0.322 SVBP Zornitza Stark gene: SVBP was added
gene: SVBP was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: SVBP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SVBP were set to 31363758; 30607023
Phenotypes for gene: SVBP were set to Neurodevelopmental disorder with ataxia, hypotonia, and microcephaly; OMIM #618569
Review for gene: SVBP was set to GREEN
Added comment: 5 unrelated families with homozygous mutations in SVBP. The mutations segregated with the disorder in all families. In vitro functional cellular expression studies showed that protein levels of the SVBP mutants were barely detectable, suggesting instability, and that the mutant proteins had lost VASH/SVBP catalytic detyrosination activity toward tubulin. Knockdown of about 50% Svbp expression using shRNA in rat hippocampal neurons impaired the formation of excitatory synapses compared to controls.
Sources: Literature
Mendeliome v0.315 SCAPER Zornitza Stark gene: SCAPER was added
gene: SCAPER was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: SCAPER was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SCAPER were set to 28794130; 31069901; 31192531; 30723319
Phenotypes for gene: SCAPER were set to Intellectual disability; retinitis pigmentosa
Review for gene: SCAPER was set to GREEN
Added comment: 28 patients from 14 unrelated families with ID and retinitis pigmentosa (some with BBS phenotype), and homozygous or compound heterozygous mutations in SCAPER gene.
Sources: Literature
Mendeliome v0.313 SCAMP5 Zornitza Stark gene: SCAMP5 was added
gene: SCAMP5 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: SCAMP5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: SCAMP5 were set to 31439720
Phenotypes for gene: SCAMP5 were set to Intellectual disability; seizures; autism
Mode of pathogenicity for gene: SCAMP5 was set to Other
Review for gene: SCAMP5 was set to GREEN
Added comment: 2 unrelated individuals with ASD, ID and seizures, with the same heterozygous de novo variant in SCAMP5 (p.Gly302Trp). Western blot analysis of proteins overexpressed in the Drosophila fat body showed strongly reduced levels of the SCAMP p.Gly302Trp protein compared with the wild-type protein, indicating that the mutant either reduced expression or increased turnover of the protein. The expression of the fly homologue of the human SCAMP5 p.Gly180Trp mutation caused similar eye and neuronal phenotypes as the expression of SCAMP RNAi, suggesting a dominant-negative effect.
Sources: Literature
Mendeliome v0.311 PPP2CA Zornitza Stark gene: PPP2CA was added
gene: PPP2CA was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: PPP2CA was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PPP2CA were set to 30595372
Phenotypes for gene: PPP2CA were set to Neurodevelopmental disorder and language delay with or without structural brain abnormalities; OMIM #618354
Review for gene: PPP2CA was set to GREEN
Added comment: 15 unrelated patients with a neurodevelopmental disorder with de novo heterozygous PPP2CA mutations, and 1 with partial deletion of PPP2CA. Functional studies showed complete PP2A dysfunction in 4 individuals with seemingly milder ID, hinting at haploinsufficiency. Ten other individuals showed mutation-specific biochemical distortions, including poor expression, altered binding to the A subunit and specific B-type subunits, and impaired phosphatase activity and C-terminal methylation.
Sources: Literature
Mendeliome v0.308 PISD Zornitza Stark commented on gene: PISD: 4 individuals in 2 unrelated but consanguineous families from Portugal and Brazil affected by early-onset retinal degeneration, sensorineural hearing loss, microcephaly, intellectual disability, and skeletal dysplasia with scoliosis and short stature (Liberfarb syndrome). Affected individuals shared a homozygous 10-bp deletion immediately upstream of the last exon of the PISD gene. In HEK293T cells, this variant led to aberrant splicing of PISD transcripts. 1 family with 2 sisters with congenital cataracts, short stature, and white matter changes identified compound heterozygous variants in the PISD gene. Decreased conversion of phosphatidylserine to PE in patient fibroblasts is consistent with impaired phosphatidylserine decarboxylase (PISD) enzyme activity.
Mendeliome v0.307 PIGB Zornitza Stark gene: PIGB was added
gene: PIGB was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: PIGB was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIGB were set to 31256876
Phenotypes for gene: PIGB were set to Epileptic encephalopathy, early infantile, 80; OMIM #618580
Review for gene: PIGB was set to GREEN
Added comment: 10 unrelated families with biallelic mutations in PIGB, with global DD and/or ID, and seizures. Two had polymicrogyria, 4 had a peripheral neuropathy, and 2 had a clinical diagnosis of DOORS syndrome. Patient lymphocytes and fibroblasts showed variably decreased levels of cell surface GPI-anchored proteins, including CD16 and CD59. In vitro functional expression studies performed with some of the mutations in PIGB-null CHO cells showed that the mutant proteins were unable to fully restore expression of GPI-anchored surface proteins, consistent with a loss of function, although the mutations had variable effects.
Sources: Literature
Mendeliome v0.305 PIBF1 Zornitza Stark gene: PIBF1 was added
gene: PIBF1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: PIBF1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PIBF1 were set to 26167768; 30858804; 29695797
Phenotypes for gene: PIBF1 were set to Joubert syndrome 33; OMIM #617767
Review for gene: PIBF1 was set to GREEN
Added comment: Three unrelated families plus three Hutterite families reported with bi-allelic variants in this gene.
Sources: Literature
Mendeliome v0.303 PHF21A Zornitza Stark gene: PHF21A was added
gene: PHF21A was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: PHF21A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PHF21A were set to 31649809; 30487643; 22770980
Phenotypes for gene: PHF21A were set to Intellectual disability; dysmorphic features
Review for gene: PHF21A was set to GREEN
Added comment: 9 cases with intellectual disability and craniofacial anomalies (Potocki-Shaffer syndrome), with de novo truncating variants in PHF21A. No functional evidence of variants, but PHF21A is highly expressed in the human fetal brain, which is consistent with the neurodevelopmental phenotype.

2 other unrelated individuals with translocations disrupting PHF21A. Lymphoblastoid cell lines from translocation subjects showed derepression of the neuronal gene SCN3A and reduced LSD1 occupancy at the SCN3A promoter, supporting a direct functional consequence of PHF21A haploinsufficiency on transcriptional regulation.
Sources: Literature
Mendeliome v0.301 POLR2A Sue White gene: POLR2A was added
gene: POLR2A was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: POLR2A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: POLR2A were set to 31353023
Phenotypes for gene: POLR2A were set to Neurodevelopmental disorder with hypotonia and variable intellectual and behavioral abnormalities, MIM# 618603
Mode of pathogenicity for gene: POLR2A was set to Other
Review for gene: POLR2A was set to GREEN
Added comment: 11 unrelated individuals reported with de novo variants in this gene. Missense variants postulated to exert a dominant-negative effect; LoF variants by contrast resulted in milder phenotype.
Sources: Literature
Mendeliome v0.299 PAK1 Zornitza Stark gene: PAK1 was added
gene: PAK1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: PAK1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PAK1 were set to 31504246; 30290153
Phenotypes for gene: PAK1 were set to Intellectual developmental disorder with macrocephaly, seizures, and speech delay; OMIM #618158
Review for gene: PAK1 was set to GREEN
Added comment: 2 unrelated individuals with de novo PAK1 mutations, with developmental delay, secondary macrocephaly, seizures, and ataxic gait. Enhanced phosphorylation of the PAK1 targets JNK and AKT shown in fibroblasts of one subject and of c-JUN in those of both subjects compared with control subjects. In fibroblasts of the 2 affected individuals, they observed a trend toward enhanced PAK1 kinase activity. By using co-immunoprecipitation and size-exclusion chromatography, they observed a significantly reduced dimerization for both PAK1 mutants compared with wild-type PAK1.

4 unrelated individuals with intellectual disability, macrocephaly and seizures, with de novo heterozygous missense variants in PAK1.
Sources: Literature
Mendeliome v0.297 P4HTM Zornitza Stark gene: P4HTM was added
gene: P4HTM was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: P4HTM was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: P4HTM were set to 25078763; 30940925
Phenotypes for gene: P4HTM were set to Hypotonia, hypoventilation, impaired intellectual development, dysautonomia, epilepsy, and eye abnormalities; OMIM #618493
Review for gene: P4HTM was set to GREEN
Added comment: 12 patients from 5 families with hypotonia, intellectual disability, and eye abnormalities, and homozygous or compound heterozygous pathogenic P4HTM gene variants. Segregated with the disorder in the families. In vitro functional expression studies of 3 of the P4HTM variants showed that they caused a significant decrease in the amount of soluble protein compared to wildtype.
Sources: Literature
Mendeliome v0.294 NFASC Zornitza Stark gene: NFASC was added
gene: NFASC was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: NFASC was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NFASC were set to 31501903; 28940097; 30124836; 30850329; 31608123
Phenotypes for gene: NFASC were set to Neurodevelopmental disorder with central and peripheral motor dysfunction; OMIM #618356
Review for gene: NFASC was set to GREEN
Added comment: > 10 unrelated families reported, exhibiting a neurodevelopmental disorder (intellectual disability, developmental delay, motor impairment, speech difficulties, early onset demyelinating neuropathy), with homozygous variants in NFASC. Segregated with the disorder in the family. Some studies with functional evidence.
Sources: Literature
Mendeliome v0.290 MEPCE Zornitza Stark gene: MEPCE was added
gene: MEPCE was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: MEPCE was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MEPCE were set to 31467394
Phenotypes for gene: MEPCE were set to Intellectual disability; seizures
Review for gene: MEPCE was set to RED
Added comment: 1 patient with global DD and seizures with de novo MEPCE nonsense variant. mRNA and protein analyses identified nonsense-mediated mRNA decay to underlie the decreased amount of MEPCE in patient fibroblasts followed by LARP7 and 7SK snRNA downregulation and HEXIM1 upregulation. Flavopiridol treatment and ectopic MEPCE protein expression in patient fibroblasts rescued increased expression of six RNAP II-sensitive genes and suggested a possible repressive effect of MEPCE on P-TEFb-dependent transcription of specific genes.
Sources: Literature
Mendeliome v0.288 MAST1 Zornitza Stark gene: MAST1 was added
gene: MAST1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: MAST1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MAST1 were set to 31721002; 30449657
Phenotypes for gene: MAST1 were set to Mega-corpus-callosum syndrome with cerebellar hypoplasia and cortical malformations; OMIM #618273
Review for gene: MAST1 was set to GREEN
Added comment: 6 unrelated patients with mega-corpus-callosum syndrome with cerebellar hypoplasia and cortical malformations (MCCCHCM) with de novo heterozygous mutations in MAST1 gene. In vitro functional studies showed that 1 of the variants (lys276del) increased MAST1 binding to microtubules compared to controls. Mutant mice heterozygous for a Mast1 leu278del allele showed a thicker corpus callosum compared to wildtype, and an overall reduction in cortical volume and thickness and decreased cerebellar volume and number of granule and Purkinje cells due to increased apoptosis compared to controls.

1 Emirati patient with ID, microcephaly, and dysmorphic features, with missense variant in MAST1.
Sources: Literature
Mendeliome v0.285 LSS Zornitza Stark gene: LSS was added
gene: LSS was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: LSS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LSS were set to 30723320
Phenotypes for gene: LSS were set to Cataract 44, OMIM #616509; Hypotrichosis 14, OMIM #618275; Intellectual disability
Review for gene: LSS was set to GREEN
Added comment: Expanded the phenotypic spectrum of LSS to a recessive neuroectodermal syndrome formerly named alopecia with mental retardation (APMR) syndrome. Ten APMR individuals from 6 unrelated families with biallelic variants in LSS. Quantification of cholesterol and its precursors did not reveal noticeable imbalance.
Sources: Literature
Mendeliome v0.281 KDM3B Zornitza Stark gene: KDM3B was added
gene: KDM3B was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: KDM3B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KDM3B were set to 30929739
Phenotypes for gene: KDM3B were set to Intellectual disability; dysmorphic features; short stature
Review for gene: KDM3B was set to GREEN
Added comment: 14 unrelated individuals and 3 affected parents with varying degrees of ID, DD, short stature, dysmorphism, and de novo or inherited pathogenic variants in KDM3B. No functional studies.
Sources: Literature
Mendeliome v0.279 GRIA2 Zornitza Stark gene: GRIA2 was added
gene: GRIA2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: GRIA2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: GRIA2 were set to 31300657
Phenotypes for gene: GRIA2 were set to Intellectual disability; autism; Rett-like features; epileptic encephalopathy
Review for gene: GRIA2 was set to GREEN
Added comment: 28 unrelated patients with ID, ASD, Rett-like features, seizures/EE, and de novo heterozygous GRIA2 mutations. In functional expression studies, mutations led to a decrease in agonist-evoked current mediated by mutant subunits compared to wild-type channels. When GluA2 subunits are co-expressed with GluA1, most GRIA2 mutations cause a decreased current amplitude and some also affect voltage rectification.
Sources: Literature
Mendeliome v0.273 GABRA5 Zornitza Stark gene: GABRA5 was added
gene: GABRA5 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: GABRA5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: GABRA5 were set to 31056671; 29961870
Phenotypes for gene: GABRA5 were set to Epileptic encephalopathy, early infantile, 79; OMIM #618559
Review for gene: GABRA5 was set to GREEN
Added comment: 3 unrelated patients with de novo heterozygous missense mutations in GABRA5 gene. In vitro functional expression studies in HEK293 cells showed that the mutant subunit was expressed at the surface and incorporated into the channel, but the mutant channel was 10 times more sensitive to GABA compared to wildtype. This increased sensitization resulted in increased receptor desensitization to GABA, with a reduced maximal GABA-evoked current and impaired capacity to pass GABAergic chloride current.
Sources: Literature
Mendeliome v0.269 FBXL3 Zornitza Stark gene: FBXL3 was added
gene: FBXL3 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: FBXL3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FBXL3 were set to 30481285
Phenotypes for gene: FBXL3 were set to Intellectual developmental disorder with short stature, facial anomalies, and speech defects; OMIM #606220
Review for gene: FBXL3 was set to GREEN
Added comment: Three unrelated families, multiple affected individuals.
Sources: Literature
Mendeliome v0.265 EEF1D Zornitza Stark gene: EEF1D was added
gene: EEF1D was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: EEF1D was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: EEF1D were set to 30787422; 28097321
Phenotypes for gene: EEF1D were set to Intellectual disability
Review for gene: EEF1D was set to AMBER
Added comment: Two unrelated families reported; one as part of a very large cohort of consanguineous families reporting multiple new candidate genes. No functional data.
Sources: Literature
Mendeliome v0.263 DYNC1I2 Zornitza Stark gene: DYNC1I2 was added
gene: DYNC1I2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: DYNC1I2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DYNC1I2 were set to 31079899
Phenotypes for gene: DYNC1I2 were set to Neurodevelopmental disorder with microcephaly and structural brain anomalies , MIM#618492
Review for gene: DYNC1I2 was set to GREEN
Added comment: Five individuals from three unrelated families reported.
Sources: Literature
Mendeliome v0.256 DDX6 Zornitza Stark gene: DDX6 was added
gene: DDX6 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: DDX6 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: DDX6 were set to 31422817
Phenotypes for gene: DDX6 were set to Intellectual developmental disorder with impaired language and dysmorphic facies, MIM#618653
Review for gene: DDX6 was set to GREEN
Added comment: Five unrelated individuals reported with 5 different de novo heterozygous missense mutations in exon 11 of the DDX6 gene. All variants occurred at conserved residues in either the QxxR or V motifs within the second RecA-2 domain of the helicase core; this region is involved in RNA and/or ATP binding, suggesting functional consequences.
Sources: Literature
Mendeliome v0.247 CDK8 Zornitza Stark gene: CDK8 was added
gene: CDK8 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: CDK8 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CDK8 were set to 30905399
Phenotypes for gene: CDK8 were set to Intellectual disability; dysmorphism; congenital abnormalities; seizures
Review for gene: CDK8 was set to GREEN
Added comment: 12 unrelated individuals, missense variants demonstrated as de novo in 10. All variants localize to the ATP-binding pocket of the kinase domain.
Sources: Literature
Mendeliome v0.233 BRSK2 Zornitza Stark gene: BRSK2 was added
gene: BRSK2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: BRSK2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: BRSK2 were set to 30879638
Phenotypes for gene: BRSK2 were set to Intellectual disability; autism
Review for gene: BRSK2 was set to GREEN
Added comment: Nine unrelated individuals with heterozygous variants in this gene; six confirmed de novo (parents available).
Sources: Literature
Mendeliome v0.231 BCORL1 Zornitza Stark gene: BCORL1 was added
gene: BCORL1 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: BCORL1 was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)
Publications for gene: BCORL1 were set to 24123876; 30941876
Phenotypes for gene: BCORL1 were set to Shukla-Vernon syndrome, MIM#301029
Review for gene: BCORL1 was set to GREEN
Added comment: Four unrelated families reported altogether; some mothers mildly affected.
Sources: Literature
Mendeliome v0.229 BCL11B Zornitza Stark gene: BCL11B was added
gene: BCL11B was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: BCL11B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: BCL11B were set to 29985992
Phenotypes for gene: BCL11B were set to Intellectual developmental disorder with dysmorphic facies, speech delay, and T-cell abnormalities, MIM# 618092
Review for gene: BCL11B was set to GREEN
Added comment: Nine unrelated individuals, all but one with de novo variants in this gene and syndromic ID/immunodeficiency. Most variants located in the last exon (exon 4) and are predicted to escape nonsense-mediated mRNA decay.
Sources: Literature
Mendeliome v0.224 APC2 Zornitza Stark gene: APC2 was added
gene: APC2 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: APC2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: APC2 were set to 31585108
Phenotypes for gene: APC2 were set to Cortical dysplasia, complex, with other brain malformations 10, MIM#618677
Review for gene: APC2 was set to GREEN
Added comment: 12 individuals from 8 unrelated families; intellectual disability, seizures, cortical dysplasia including posterior to anterior predominant pattern of lissencephaly, heterotopias, paucity of white matter, thin corpus callosum.
Sources: Literature
Mendeliome v0.220 ACTL6B Zornitza Stark gene: ACTL6B was added
gene: ACTL6B was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: ACTL6B was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ACTL6B were set to 31134736; 31031012; 30656450; 30237576
Phenotypes for gene: ACTL6B were set to Epileptic encephalopathy, early infantile, 76, MIM# 618468; Intellectual developmental disorder with severe speech and ambulation defects, MIM# 618470
Review for gene: ACTL6B was set to GREEN
Added comment: Over 10 unrelated individuals reported in the literature.
Sources: Literature
Mendeliome v0.215 PPP1R21 Zornitza Stark gene: PPP1R21 was added
gene: PPP1R21 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: PPP1R21 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PPP1R21 were set to 30520571
Phenotypes for gene: PPP1R21 were set to Hypotonia; intellectual disability; white matter abnormalities
Review for gene: PPP1R21 was set to GREEN
Added comment: At least four unrelated families reported.
Sources: Literature
Mendeliome v0.182 MRPS16 Zornitza Stark Phenotypes for gene: MRPS16 were changed from to Combined oxidative phosphorylation deficiency 2; OMIM #610498
Mendeliome v0.177 MRPL3 Zornitza Stark Phenotypes for gene: MRPL3 were changed from to Combined oxidative phosphorylation deficiency 9; OMIM #614582
Mendeliome v0.167 MIR17HG Zornitza Stark gene: MIR17HG was added
gene: MIR17HG was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: MIR17HG was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MIR17HG were set to 25391829; 21892160
Phenotypes for gene: MIR17HG were set to Feingold syndrome 2; OMIM #614326
Review for gene: MIR17HG was set to GREEN
Added comment: 4 unrelated cases reported - 3 with gene deletions, 1 with SNV
Sources: Expert list
Mendeliome v0.165 KLF7 Zornitza Stark gene: KLF7 was added
gene: KLF7 was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: KLF7 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KLF7 were set to 29251763
Phenotypes for gene: KLF7 were set to Intellectual disability
Review for gene: KLF7 was set to GREEN
Added comment: Four unrelated individuals with de novo missense variants; animal model data supportive.
Sources: Literature
Mendeliome v0.148 FRMPD4 Zornitza Stark gene: FRMPD4 was added
gene: FRMPD4 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: FRMPD4 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: FRMPD4 were set to 25644381; 29267967
Phenotypes for gene: FRMPD4 were set to Mental retardation, X-linked 104, MIM#300983
Review for gene: FRMPD4 was set to GREEN
Added comment: Multiple affected individuals from unrelated families reported.
Sources: Expert list
Mendeliome v0.64 BDNF Zornitza Stark reviewed gene: BDNF: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: Central hypoventilation syndrome, congenital, MIM#209880; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.43 ZNF526 Zornitza Stark Added comment: Comment on list classification: Found unpublished abstract linking to AR intellectual disability in consanguineous Iranian population, no functional data provided.
Mendeliome v0.14 KDM6B Zornitza Stark gene: KDM6B was added
gene: KDM6B was added to Mendeliome_VCGS. Sources: Literature
Mode of inheritance for gene: KDM6B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KDM6B were set to 31124279
Phenotypes for gene: KDM6B were set to Neurodevelopmental disorder with coarse facies and mild distal skeletal abnormalities, MIM#618505
Review for gene: KDM6B was set to GREEN
Added comment: 12 unrelated patients reported with de novo variants in this gene, no functional evidence.
Sources: Literature
Mendeliome v0.0 LAT Zornitza Stark gene: LAT was added
gene: LAT was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: LAT was set to Unknown
Mendeliome v0.0 DLAT Zornitza Stark gene: DLAT was added
gene: DLAT was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: DLAT was set to Unknown