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| Mendeliome v2.252 | EVC |
Zornitza Stark commented on gene: EVC: Weyers acrofacial dysostosis is an autosomal dominant condition with dental anomalies, nail dystrophy, postaxial polydactyly, and mild short stature. Ellis-van Creveld syndrome is a similar disorder, with autosomal recessive inheritance and the additional features of disproportionate dwarfism, thoracic dysplasia, and congenital heart disease. Note the variant originally reported as associated with Weyers has been identified in phenotypically normal individuals and the gene-disease relationship is disputed. The association between bi-allelic variants and EVC syndrome is well established. |
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| Mendeliome v2.0 | RIGI | Gene symbol changed from DDX58 to RIGI during gene set migration (ENSG00000107201 -> ENSG00000107201) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.5012 | ZMYND12 |
Bryony Thompson gene: ZMYND12 was added gene: ZMYND12 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ZMYND12 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ZMYND12 were set to 39066891; 37934199 Phenotypes for gene: ZMYND12 were set to Infertility disorder, MONDO:0005047 Review for gene: ZMYND12 was set to GREEN Added comment: PMID 39066891 and PMID 37934199 report five individuals from five unrelated families with biallelic loss-of-function ZMYND12 variants presenting with severe male infertility, including asthenozoospermia and multiple morphological abnormalities of the sperm flagellum. Affected men exhibit markedly reduced progressive sperm motility and abnormal flagellar morphology leading to primary infertility. Mouse Zmynd12 knockout recapitulates subfertility and reduced sperm velocity, and RNAi knock‑down of the ortholog in Trypanosoma reproduces flagellar motility defects, though rescue experiments are lacking. The recurrent c.433C>T stop‑gain variant occurs in three families across distinct populations, with evidence of independent origins. Sources: Literature |
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| Mendeliome v1.4408 | MAATS1 |
Bryony Thompson gene: MAATS1 was added gene: MAATS1 was added to Mendeliome. Sources: Literature new gene name tags were added to gene: MAATS1. Mode of inheritance for gene: MAATS1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MAATS1 were set to 32161152 Phenotypes for gene: MAATS1 were set to spermatogenic failure MONDO:0004983 Review for gene: MAATS1 was set to GREEN Added comment: 6 unrelated men of North African origin homozygous for 2 different variants and a supporting Trypanosoma brucei model. Sources: Literature |
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| Mendeliome v1.3737 | HMGCS1 | Zornitza Stark Phenotypes for gene: HMGCS1 were changed from Rigid spine syndrome, MONDO:0019951, HMGCS1-related to Congenital myopathy 28 with rigid spine, MIM# 621433 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.3736 | HMGCS1 | Zornitza Stark edited their review of gene: HMGCS1: Changed phenotypes: Congenital myopathy 28 with rigid spine, MIM# 621433 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.3441 | SLC7A2 |
Zornitza Stark gene: SLC7A2 was added gene: SLC7A2 was added to Mendeliome. Sources: Literature founder tags were added to gene: SLC7A2. Mode of inheritance for gene: SLC7A2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SLC7A2 were set to 41015522 Phenotypes for gene: SLC7A2 were set to Leukodystrophy, MONDO:0019046, SLC7A2-related Review for gene: SLC7A2 was set to AMBER Added comment: RAVINE leukoencephalopathy (RLE) is a hereditary autosomal recessive disease characterized by typical clinical and radiological signs that has so far been observed only in patients of Reunionese origin. The term RAVINE is a French acronym for the main clinical features of the disease: Réunion, Anorexie, Vomissements Incoercibles, signes NEurologiques (Reunion, Anorexia, Intractable Vomiting, NEurological signs). Patients with RLE carry the IVS1-1778A>G mutation of the SLC7A2 gene in the homozygous state. Onset is in infancy. Death typically occurs before the age of 28months in a very narrow time window (23.0±2.2months). PMID 41015522 summarises data from 40 affected individuals. Sources: Literature |
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| Mendeliome v1.2400 | SVBP | Zornitza Stark edited their review of gene: SVBP: Added comment: PMID 39412222: 6 individuals from 3 families with spastic paraplegia and the same homozygous missense (L49P). Presented from birth or childhood with DD/ID and spastic paraplegia. Additional features: verbal apraxia, axonal neuropathy, ataxia, nystagmus, epilepsy, and aggressive behaviour. Brain MRIs were performed in 3 individuals and showed thinning of the corpus callosum, cerebellar atrophy, and ventriculomegaly; frontal ventricular hyperintensities suggestive of the 'ear of the lynx' sign in 2. Three individuals had a history of cancer of epithelial origin, including adenocarcinoma (patient 1), colonic tubular adenoma (patient 2), and breast cancer (patient 3).; Changed publications: 31363758, 30607023, 39412222; Changed phenotypes: Neurodevelopmental disorder with ataxia, hypotonia, and microcephaly, MIM #618569, Spastic paraplegia 94, autosomal recessive, MIM# 621150 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.2258 | DDX58 | Zornitza Stark Added comment: Comment when marking as ready: New HGNC approved name is RIGI. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.2184 | HMGCS1 |
Zornitza Stark gene: HMGCS1 was added gene: HMGCS1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: HMGCS1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: HMGCS1 were set to 39531736 Phenotypes for gene: HMGCS1 were set to Rigid spine syndrome, MONDO:0019951, HMGCS1-related Review for gene: HMGCS1 was set to GREEN Added comment: Five individuals from four families reported. All individuals presented with spinal rigidity primarily affecting the cervical and dorsolumbar regions, scoliosis, and respiratory insufficiency. Creatine kinase levels were variably elevated. The clinical course worsened with intercurrent disease or certain drugs in some; one individual died from respiratory failure following infection. Muscle biopsies revealed irregularities in oxidative enzyme staining with occasional internal nuclei and rimmed vacuoles. HMGCS1 encodes a critical enzyme of the mevalonate pathway. Notably, biallelic hypomorphic variants in downstream enzymes including HMGCR and GGPS1 are associated with muscular dystrophy. Hmgcs1 mutant zebrafish displayed severe early defects, including immobility at 2 days and death by day 3 post-fertilisation and were rescued by HMGCS1 mRNA. Four variants tested (S447P, Q29L M70T, and C268S) have reduced function compared to wildtype HMGCS1 in zebrafish rescue assays Sources: Literature |
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| Mendeliome v1.1903 | HBS1L |
Bryony Thompson gene: HBS1L was added gene: HBS1L was added to Mendeliome. Sources: Literature Mode of inheritance for gene: HBS1L was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: HBS1L were set to 38966981; 24288412; 30707697 Phenotypes for gene: HBS1L were set to Retinal disorder MONDO:0005283 Review for gene: HBS1L was set to AMBER Added comment: A single case with biallelic variants reported with retinal dystrophy, poor growth and neurodevelopmental delay (originally reported in 2013). A hypomorph mouse model demonstrated defective development of photoreceptor cells. Sources: Literature |
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| Mendeliome v1.1737 | SLC4A7 |
chirag patel gene: SLC4A7 was added gene: SLC4A7 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SLC4A7 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SLC4A7 were set to PMID: 35486108, 32594822 Phenotypes for gene: SLC4A7 were set to Retinitis pigmentosa, MONDO:0019200 Review for gene: SLC4A7 was set to AMBER Added comment: Total 4 individuals from 3 families (2 known to be from same ethnic origin: Oriental-Jewish) with adult onset retinitis pigmentosa. All individuals had same homozygous frameshift variant in SLC4A7 gene (p.P670Sfs*6). RNA seq analysis revealed retinal expression in human and mouse samples. Immunohistochemistry of human and mouse retina revealed relatively strong expression in various retinal layers. Western blot analysis in fibroblasts from 1 patient showed absence of encoded protein. Sources: Literature |
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| Mendeliome v1.1670 | SCA4_ZFHX3_GGC |
Bryony Thompson STR: SCA4_ZFHX3_GGC was added STR: SCA4_ZFHX3_GGC was added to Mendeliome. Sources: Literature Mode of inheritance for STR: SCA4_ZFHX3_GGC was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: SCA4_ZFHX3_GGC were set to 38035881; 38197134 Phenotypes for STR: SCA4_ZFHX3_GGC were set to spinocerebellar ataxia type 4 MONDO:0010847 Review for STR: SCA4_ZFHX3_GGC was set to GREEN STR: SCA4_ZFHX3_GGC was marked as clinically relevant Added comment: PMID: 38035881 - repeat expansion is identified in 5 Swedish ataxia families that developed balance and gait disturbances at 15 to 60 years of age and had sensory neuropathy and slow saccades. PMID: 38197134 - Poly-glycine GGC expansion in the last coding exon of ZFHX3 was identified in the original SCA4 Utah pedigree (Swedish origin) in the region of high linkage identified on 16q22. The expansion was also identified in an Iowa ataxia pedigree of Swedish ancestry. The expansion wasn’t identified in 11,258 exomes, 7,650 WGS probands without neurological phenotype, or 803 individuals with ataxia. Grch38 chr16:72787695–72787758 Normal allele <30 repeats, 21 repeats is the most common (derived from 33,094 individuals) Undefined pathogenic 30-48 repeats Definitive pathogenicity 48+ repeats Sources: Literature |
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| Mendeliome v1.1584 | RGS6 |
Seb Lunke gene: RGS6 was added gene: RGS6 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RGS6 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RGS6 were set to 38332109; 25525169 Phenotypes for gene: RGS6 were set to Cataract,MONDO:0005129; intellectual disability, MONDO:0001071; microcephaly, MONDO:0001149 Review for gene: RGS6 was set to RED Added comment: Original paper from 2015 describes single consanguineous with two siblings affected by cataract, developmental delay, and microcephaly >3SD. A homozygous canonical splice variant predicted to lead to NMD in RGS6 was identified by WGS and linkage (rather than full WGS analysis). The 2024 paper speculates that the phenotype is driven by a change in RGS6 isoform balance rather than LoF using a knock-out mouse model. It is noted that the mice did not have microcephaly, and ID was assessed using social interaction. No mention of cataract in the mice. Sources: Literature |
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| Mendeliome v1.1338 | SGSM3 |
Dean Phelan gene: SGSM3 was added gene: SGSM3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SGSM3 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SGSM3 were set to PMID: 37833060 Phenotypes for gene: SGSM3 were set to Neurodevelopmental disorder (MONDO:0700092), SGSM3-related Review for gene: SGSM3 was set to AMBER Added comment: PMID: 37833060 - 13 patients from 8 families of Ashkenazi Jewish origin all had the same homozygous frameshift variant (c.981dup). Predicted to cause NMD. The variant co-segregated with disease in all available family members. The affected individuals displayed mild global developmental delay and mild to moderate intellectual disability. Additional prevalent phenotypes observed included hypotonia, behavioural challenges and short stature. Considered a founder variant (1 in 52 Ashkenazi Jews carry the variant). Also present in other populations but no homozygotes in gnomAD. Sources: Literature |
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| Mendeliome v1.1293 | IRF4 | Zornitza Stark edited their review of gene: IRF4: Added comment: PMID 36662884: Seven individuals with profound CID from six kindreds of diverse ethnic origins (Fig. 1A). All affected individuals suffered with early onset (<1 year of age) recurrent sinopulmonary infections, with the opportunistic pathogen Pneumocystis jirovecii causing pneumonia in most individuals. p.T95R variant found in all patients. Extensive functional data including knockout mouse model. The heterozygous IRF4T95R variant found in multiple unrelated families caused a fully penetrant, severe very early-onset immunodeficiency characterized by greatly enhanced susceptibility to opportunistic pathogens such as P. jirovecii and weakly pathogenic mycobacteria.; Changed rating: GREEN; Changed publications: 29537367, 36662884; Changed phenotypes: Combined immunodeficiency, MONDO:0015131, IRF4-related; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.923 | TNNT1 | Zornitza Stark Phenotypes for gene: TNNT1 were changed from Nemaline myopathy 5, Amish type, MIM# 605355; nemaline myopathy MONDO:0018958 to Nemaline myopathy 5, Amish type, MIM# 605355; Nemaline myopathy-5B with rigid spine and respiratory insufficiency (NEM5B), MIM#620386; nemaline myopathy-5C (NEM5C), autosomal dominant, MIMD620389 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.922 | TNNT1 | Zornitza Stark edited their review of gene: TNNT1: Changed phenotypes: Nemaline myopathy 5, Amish type, MIM# 605355, Nemaline myopathy-5B with rigid spine and respiratory insufficiency (NEM5B), MIM#620386, nemaline myopathy-5C (NEM5C), autosomal dominant, MIMD620389 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.834 | SLC30A9 |
Lucy Spencer gene: SLC30A9 was added gene: SLC30A9 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SLC30A9 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SLC30A9 were set to 37041080 Phenotypes for gene: SLC30A9 were set to Birk-Landau-Perez syndrome (MIM#617595) Review for gene: SLC30A9 was set to GREEN Added comment: PMID:37041080 - 2 families previously reported and this paper describes 4 more with biallelic SLC30A9 variants. Original 2 families: 6 affected members all hom for Ala350del, and 1 affected member chet for 2 frameshifts. 4 families from this paper: 2 families have the same homozygous missense (Gly418Val), family 3 has 4 affected sibs hom for Ala350del, family 4 1 affected chet for a frameshift and a synonymous. So 2 fams homs for Ala350del and 2 fams hom for Gly418Val. All have Brik-Landau-Perez syndrome: all with ID, movement disorder and dystonia, and many with oculomotor apraxia, renal abnormalitie, ptosis, some had hearing impairment. Sources: Literature |
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| Mendeliome v1.775 | ESAM |
Chern Lim gene: ESAM was added gene: ESAM was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ESAM was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ESAM were set to 36996813 Phenotypes for gene: ESAM were set to Neurodevelopmental disorder (MONDO#0700092), ESAM-related Review for gene: ESAM was set to GREEN gene: ESAM was marked as current diagnostic Added comment: PMID 36996813 - Thirteen affected individuals, including four fetuses, from eight unrelated families, with homozygous loss-of-function-type variants in ESAM – 2 of the variants are frameshifts, 1x nonsense, 1x canonical splice. - Affected individuals have profound global developmental delay/unspecified intellectual disability, epilepsy, absent or severely delayed speech, varying degrees of spasticity, ventriculomegaly, and ICH/cerebral calcifications, the latter being also observed in the fetuses. - One of the frameshift variant c.115del (p.Arg39Glyfs*33), was detected in six individuals from four unrelated families from the same geographic region in Turkey (southeastern Anatolia), suggesting a founder effect. - The c.451+1G>A variant was detected in three individuals from two independent families with the same ethnic origin (Arab Bedouin) Sources: Literature |
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| Mendeliome v1.665 | LTV1 |
Achchuthan Shanmugasundram gene: LTV1 was added gene: LTV1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: LTV1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: LTV1 were set to 34999892 Phenotypes for gene: LTV1 were set to Inflammatory poikiloderma with hair abnormalities and acral keratoses, OMIM:620199 Review for gene: LTV1 was set to AMBER Added comment: Comment on classification of gene: This gene should be rated amber as it has been implicated in inflammatory poikiloderma with hair abnormalities and acral keratoses as identified from two unrelated families harbouring the same biallelic variant and supported by functional studies. PMID:34999892 reported four UK women of South Asian origin (three Pakistani sisters and an unrelated Indian woman) identified with homozygous variant c.503A>G, (p.Asn168Ser) and presented with poikiloderma, hair abnormalities, and acral keratoses, which the authors named as inflammatory poikiloderma with hair abnormalities and acral keratoses (IPHAK). Both in silico modelling and splicing assays from a patient sample showed that this variant is responsible for splicing defects and defects in LTV1 alter the export of nascent ribosomal subunits to the cytoplasm in yeast. This gene has already been associated with relevant phenotype (MIM #620199) in OMIM, but not in Gene2Phenotype. Sources: Literature |
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| Mendeliome v1.630 | TRU-TCA1-1 |
Paul De Fazio gene: TRU-TCA1-1 was added gene: TRU-TCA1-1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TRU-TCA1-1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TRU-TCA1-1 were set to 26854926; 34956927 Phenotypes for gene: TRU-TCA1-1 were set to Hyperthyroidism MONDO:0004425 Review for gene: TRU-TCA1-1 was set to AMBER gene: TRU-TCA1-1 was marked as current diagnostic Added comment: PMID 26854926: male 8 year old proband investigated for abdominal pain, fatigue, muscle weakness, and thyroid dysfunction (raised T4, normal T3, raised reverse T3) suggestive of impaired deiodinase activity in combination with low plasma selenium levels. Homozygosity mapping led to identification of a a single nucleotide change, C65G, in TRU-TCA1-1, a tRNA in the selenocysteine incorporation pathway. This mutation resulted in reduction in expression of stress-related selenoproteins. A methylribosylation defect at uridine 34 of mutant tRNA observed in patient cells was restored by cellular complementation with normal tRNA. PMID 34956927: a 10 year old originally investigated for Hashimoto's disease was found to be homozygous for the same C65G variant identified in the previous paper, inherited from the father in what was concluded to be paternal isodisomy. Sources: Literature |
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| Mendeliome v1.480 | AFDN |
Zornitza Stark gene: AFDN was added gene: AFDN was added to Mendeliome. Sources: Literature Mode of inheritance for gene: AFDN was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: AFDN were set to 36384317 Phenotypes for gene: AFDN were set to Cleft lip/palate, MONDO:0016044, AFDN-related Review for gene: AFDN was set to RED Added comment: Over-representation of rare AFDN missense variants reported in a cohort of CL/P individuals of African and Brazilian origin. However, almost all of the variants reported have hets in gnomad. The one that is novel has alternative missense at the same aa position. Sources: Literature |
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| Mendeliome v1.169 | C20orf24 |
Zornitza Stark gene: C20orf24 was added gene: C20orf24 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: C20orf24 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: C20orf24 were set to 35614220; 24194475 Phenotypes for gene: C20orf24 were set to Craniofacial dysmorphism, skeletal anomalies, and impaired intellectual development syndrome 2, MIM# 616994 Review for gene: C20orf24 was set to RED Added comment: Bi-allelic LoF variant identified in patient originally reported in PMID 24194475. HGNC approved name is RAB5IF. Sources: Literature |
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| Mendeliome v0.14650 | ADD1 |
chirag patel gene: ADD1 was added gene: ADD1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ADD1 was set to BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal Publications for gene: ADD1 were set to PMID: 34906466 Phenotypes for gene: ADD1 were set to Intellectual disability, corpus callosum dysgenesis, and ventriculomegaly; no OMIM # Review for gene: ADD1 was set to GREEN Added comment: 4 unrelated individuals affected by ID and/or complete or partial agenesis of corpus callosum, and enlarged lateral ventricles. WES found loss-of-function variants - 1 recessive missense variant and 3 de novo variants. The recessive variant is associated with ACC and enlarged lateral ventricles, and the de novo variants were associated with complete or partial agenesis of corpus callosum, mild ID and attention deficit. Human variants impair ADD1 protein expression and/or dimerization with ADD2. Add1 knockout mice recapitulate corpus callosum dysgenesis and ventriculomegaly phenotypes. Three adducin genes (ADD1, ADD2, and ADD3) encode cytoskeleton proteins that are critical for osmotic rigidity and cell shape. ADD1, ADD2, and ADD3 form heterodimers (ADD1/ADD2, ADD1/ADD3), which further form heterotetramers. Adducins interconnect spectrin and actin filaments to form polygonal scaffolds beneath the cell membranes and form ring-like structures in neuronal axons. Adducins regulate mouse neural development, but their function in the human brain is unknown Sources: Literature |
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| Mendeliome v0.13422 | TUBA8 | Zornitza Stark changed review comment from: Two families reported initially (PMID 19896110). However, note that mouse model does not have a brain phenotype and WES in the original families identified homozygous, previously reported as pathogenic, LoF variant in SNAP29, which is much more likely to be causative (28388629).; to: Bi-allelic variants and cortical dysplasia: Two families reported initially (PMID 19896110). However, note that mouse model does not have a brain phenotype and WES in the original families identified homozygous, previously reported as pathogenic, LoF variant in SNAP29, which is much more likely to be causative (28388629). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11975 | TEAD1 |
Zornitza Stark changed review comment from: Sveinsson chorioretinal atrophy (SCRA) is characterized by bilateral, well-defined, tongue-shaped strips of atrophic retina and choroid that extend from the optic nerve into the peripheral ocular fundus. The lesions may be evident at birth and usually progress at a variable rate, sometimes leading to central visual loss. Separate small distinct circular atrophic lesions are observed in the peripheral ocular fundus in some patients. Congenital anterior polar cataracts are found in approximately 25% of affected individuals. The vast majority of reported cases were of Icelandic origin but the characteristic clinical picture of SCRA is also described in patients of non-Icelandic descent. The variant reported in the Icelanding population is (c.1261T>C, p.Tyr421His), another variant at same position c.1261T>A, p.Tyr421Asn also reported in non-Icelandic family. Functional data supports gene-disease association.; to: Sveinsson chorioretinal atrophy (SCRA) is characterized by bilateral, well-defined, tongue-shaped strips of atrophic retina and choroid that extend from the optic nerve into the peripheral ocular fundus. The lesions may be evident at birth and usually progress at a variable rate, sometimes leading to central visual loss. Separate small distinct circular atrophic lesions are observed in the peripheral ocular fundus in some patients. Congenital anterior polar cataracts are found in approximately 25% of affected individuals. The vast majority of reported cases were of Icelandic origin but the characteristic clinical picture of SCRA is also described in patients of non-Icelandic descent. The variant reported in the Icelanding population is (c.1261T>C, p.Tyr421His), another variant at same position c.1261T>A, p.Tyr421Asn also reported in non-Icelandic family. A de novo nonsense variant has also been reported in a case with Aicardi syndrome with infantile spasms, agenesis of the corpus callosum, and chorioretinal lacunae. |
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| Mendeliome v0.11071 | CHKA |
Konstantinos Varvagiannis gene: CHKA was added gene: CHKA was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CHKA was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CHKA were set to 35202461 Phenotypes for gene: CHKA were set to Abnormal muscle tone; Global developmental delay; Intellectual disability; Seizures; Microcephaly; Abnormality of movement; Abnormality of nervous system morphology; Short stature Penetrance for gene: CHKA were set to Complete Review for gene: CHKA was set to GREEN Added comment: Klöckner (2022 - PMID: 35202461) describe the phenotype of 6 individuals (from 5 unrelated families) harboring biallelic CHKA variants. Shared features incl. abnormal muscle tone(6/6 - hypertonia or hypotonia, 3/6 each), DD/ID (6/6,severe in 4, severe/profound in 2), epilepsy (6/6 - onset: infancy - 3y2m | epileptic spasms or GS at onset), microcephaly (6/6), movement disorders (3/6 - incl. dyskinesia, rigidity, choreoatetotic movements). 2/5 individuals exhibited MRI abnormalities, notably hypomyelination. Short stature was observed in 4/6. Eventual previous genetic testing was not discussed. Exome sequencing (quattro ES for 2 sibs, trio ES for 1 individual, singleton for 3 probands) revealed biallelic CHKA variants in all affected individuals. Sanger sequencing was performed for confirmation and segregation studies. Other variants (in suppl.) were not deemed to be causative for the neurodevelopmental phenotype. 3 different missense, 1 start-loss and 1 truncating variant were identified, namely (NM_0012772.2): - c.421C>T/p.(Arg141Trp) [3 hmz subjects from 2 consanguineous families], - c.580C>T/p.Pro194Ser [1 hmz individual born to consanguineous parents], - c.2T>C/p.(Met1?) [1 hmz individual born to related parents], - c.14dup/p.(Cys6Leufs*19) in trans with c.1021T>C/p.(Phe341Leu) in 1 individual. CHKA encodes choline kinase alpha, an enzyme catalyzing the first step of phospholipid synthesis in the Kennedy pathway. The pathway is involved in de novo synthesis of glycerophospholipids, phosphatidylcholine and phosphatidylethanolamine being the most abundant in eukaryotic membranes. CHKA with its paralog (CHKB) phosphorylates either choline or ethanolamine to phosphocholine or phosphoethanolamine respectively with conversion of ATP to ADP. As the authors comment, biallelic pathogenic variants in CHKB cause a NDD with muscular dystrophy, hypotonia, ID, microcephaly and structural mitochondrial anomalies (MIM 602541). [Prominent mitochondrial patterning was observed in a single muscle biopsy available from an individual with biallelic CHKA variants]. Other disorders of the Kennedy pathway (due to biallelic PCYT2, SELENOI, PCYT1A variants) present with overlapping features incl. variable DD/ID (no-severe), microcephaly, seizures, visual impairment etc. CHKA variants were either absent or observed once in gnomAD, affected highly conserved AAs with multiple in silico predictions in favor of a deleterious effect. In silico modeling suggests structural effects for several of the missense variants (Arg141Trp, Pro194Ser presumably affect ADP binding, Phe341 lying close to the binding site of phosphocholine). Each of the missense variants was expressed in yeast cells and W. Blot suggested expression at the expected molecular weight at comparative levels. The 3 aforementioned variants exhibited reduced catalytic activity (20%, 15%, 50% respectively). NMD is thought to underly the deleterious effect of the frameshift one (not studied). The start-loss variant is expected to result in significantly impaired expression and protein function as eventual utilization of the next possible start codon - occurring at position 123 - would remove 26% of the protein. Chka(-/-) is embryonically lethal in mice, suggesting that complete loss is not compatible with life. Reduction of choline kinase activity by 30% in heterozygous mice did not appear to result in behavioral abnormalities although this was not studied in detail (PMID cited: 18029352). Finally, screening of 1566 mouse lines identified 198 genes whose disruption yields neuroanatomical phenotypes, Chka(+/-) mice being among these (PMID cited: 31371714). There is no associated phenotype in OMIM, Gene2Phenotype or SysID. Overall this gene can be considered for inclusion in the ID and epilepsy panes with green or amber rating (>3 individuals, >3 variants, variant studies, overlapping phenotype of disorders belonging to the same pathway, etc). Consider also inclusion in the microcephaly panel (where available this seemed to be of postnatal onset). Sources: Literature |
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| 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 v0.9694 | BRAT1 | Zornitza Stark Phenotypes for gene: BRAT1 were changed from to Neurodevelopmental disorder with cerebellar atrophy and with or without seizures, MIM#618056; Rigidity and multifocal seizure syndrome, lethal neonatal, MIM# 614498 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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. |
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| Mendeliome v0.9691 | BRAT1 | Zornitza Stark edited their review of gene: BRAT1: Changed publications: 26483087, 26494257, 27282546, 22279524, 23035047, 25319849, 25500575, 34747546; Changed phenotypes: Neurodevelopmental disorder with cerebellar atrophy and with or without seizures, MIM#618056, Rigidity and multifocal seizure syndrome, lethal neonatal, MIM# 614498 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| Mendeliome v0.9370 | GABRD | Zornitza Stark changed review comment from: Limited reports. The variant originally reported in PMID 15115768 in association with epilepsy is present in >4,000 hets in gnomad and 55 homs which is not consistent with a Mendelian disorder.; to: Susceptibility to epilepsy, MIM#613060: Limited reports. The variant originally reported in PMID 15115768 in association with epilepsy is present in >4,000 hets in gnomad and 55 homs which is not consistent with a Mendelian disorder. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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. |
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| Mendeliome v0.8883 | TOR1AIP1 | Zornitza Stark Phenotypes for gene: TOR1AIP1 were changed from Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness; Contractures to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Congenital myasthenic syndrome | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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. |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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. |
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| Mendeliome v0.6328 | COL7A1 | Zornitza Stark Phenotypes for gene: COL7A1 were changed from to EBD inversa, MIM# 226600; EBD, Bart type MIM# 132000; EBD, localisata variant; Epidermolysis bullosa dystrophica, MIM# 131750; Epidermolysis bullosa dystrophica, 226600; Epidermolysis bullosa pruriginosa 604129; Epidermolysis bullosa, pretibial, MIM# 131850; Transient bullous of the newborn 131705 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6326 | COL7A1 | Zornitza Stark reviewed gene: COL7A1: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: EBD inversa, MIM# 226600, EBD, Bart type MIM# 132000, EBD, localisata variant, Epidermolysis bullosa dystrophica, MIM# 131750, Epidermolysis bullosa dystrophica, 226600, Epidermolysis bullosa pruriginosa 604129, Epidermolysis bullosa, pretibial, MIM# 131850, Transient bullous of the newborn 131705; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5601 | CANVAS_ACAGG | Bryony Thompson Added comment: Comment on list classification: Used the pathogenic cut-off of 400 repeats from original CANVAS repeat | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5500 | KCNJ18 |
Zornitza Stark gene: KCNJ18 was added gene: KCNJ18 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: KCNJ18 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KCNJ18 were set to 20074522; 27008341 Phenotypes for gene: KCNJ18 were set to {Thyrotoxic periodic paralysis, susceptibility to, 2}, MIM# 613239 Review for gene: KCNJ18 was set to RED Added comment: Six variants reported in original publication, however note lack of segregation data and limited functional data. Subsequently, concerns raised about high nucleotide sequence homology between multiple potassium channel genes, with variant misattribution. Sources: Expert Review |
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| Mendeliome v0.4973 | SELENON | Zornitza Stark Phenotypes for gene: SELENON were changed from to Myopathy, congenital, with fiber-type disproportion, MIM# 255310; Muscular dystrophy, rigid spine, 1, MIM# 602771 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4970 | SELENON | Zornitza Stark reviewed gene: SELENON: Rating: GREEN; Mode of pathogenicity: None; Publications: 11528383, 12192640, 16365872, 21131290, 21131290, 32154989, 32796131; Phenotypes: Myopathy, congenital, with fiber-type disproportion, MIM# 255310, Muscular dystrophy, rigid spine, 1, MIM# 602771; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| 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 v0.3732 | 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 |
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| Mendeliome v0.3262 | AKR1E2 |
Zornitza Stark gene: AKR1E2 was added gene: AKR1E2 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: AKR1E2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: AKR1E2 were set to 26622071 Phenotypes for gene: AKR1E2 were set to congenital cataracts Review for gene: AKR1E2 was set to RED Added comment: Same family with homozygous canonical splice variants and 3 cases of congenital cataract described in 2012 (original) and 2015 (review). No other descriptions since. Sources: Expert list |
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| Mendeliome v0.3174 | TSHZ1 | Zornitza Stark changed review comment from: Two individuals reported with LoF variants, both with a phenotype of congenital aural atresia and hyposmia (PMID: 22152683). Temporal and spatial expression of Tshz1 mRNA during development of the middle ear is consistent with the phenotype (PMID: 17586487). Tsh2 null mouse model showed a middle ear malformation, and neonatal lethality. A conditional nervous system-specific Tshz1 knock out mouse model demonstrated hyposmia (PMIDs: 24487590; 17586487).; to: Two individuals reported with LoF variants, both with a phenotype of congenital aural atresia and hyposmia (PMID: 22152683). Temporal and spatial expression of Tshz1 mRNA during development of the middle ear is consistent with the phenotype (PMID: 17586487). Tsh2 null mouse model showed a middle ear malformation, and neonatal lethality. A conditional nervous system-specific Tshz1 knock out mouse model demonstrated hyposmia (PMIDs: 24487590; 17586487). Also note original report contains four individuals with deletions of this gene, further supporting gene-disease association. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2973 | TOR1AIP1 | Zornitza Stark Phenotypes for gene: TOR1AIP1 were changed from Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness; Contractures | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2972 | TOR1AIP1 | Zornitza Stark Phenotypes for gene: TOR1AIP1 were changed from Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072 to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.1842 | ADGRG6 | Zornitza Stark edited their review of gene: ADGRG6: Added comment: Three families reported originally with severe prenatal-onset arthrogryposis (PMID: 26004201), one family with more complex neurological phenotype (PMID:30549416).; Changed rating: GREEN; Changed publications: 30549416, 26004201; Changed phenotypes: Lethal congenital contracture syndrome 9, OMIM #616503; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.1471 | COX4I2 | Zornitza Stark edited their review of gene: COX4I2: Added comment: Glu138Lys present in 3 homozygotes in gnomad, wich is out of keeping for this rare metabolic disorder. Note no other variants reported in this gene since original report in 2009. All variants submitted to ClinVar are VOUS/LB/B.; Changed rating: RED | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.1338 | TOR1AIP1 |
Bryony Thompson gene: TOR1AIP1 was added gene: TOR1AIP1 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: TOR1AIP1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TOR1AIP1 were set to 24856141; 31299614; 30723199; 27342937 Phenotypes for gene: TOR1AIP1 were set to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072 Review for gene: TOR1AIP1 was set to GREEN Added comment: At least 5 families/cases reported with muscular dystrophy and sometimes cardiomyopathy. Sources: Expert list |
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| Mendeliome v0.618 | ADRA2B | Zornitza Stark Added comment: Comment when marking as ready: Comment when marking as ready: Association has in fact been REFUTED by Corbett et al 2019 (PMID:31664034, who identified an alternative cause in the original families. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||