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| Mendeliome v1.2244 | DDX53 |
Chirag Patel gene: DDX53 was added gene: DDX53 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DDX53 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: DDX53 were set to PMID: 39706195 Phenotypes for gene: DDX53 were set to autism spectrum disorder MONDO:0005258 Review for gene: DDX53 was set to GREEN Added comment: The DDX53 gene is a single-exon RNA helicase which lies intronic to PTCHD1-AS (a multi-isoform long noncoding RNA (lncRNA) at the Xp22.11 locus. It is thought to play a role in RNA decay, RNA processing, ribosome biogenesis, and translation initiation. 9 affected males and 3 affected females from 9 unrelated families with ASD and rare, predicted damaging or loss-of-function variants in DDX53 (including a gene deletion involving DDX53 and exons of the noncoding RNA PTCHD1-AS). A further 26 individuals with ASD were identified (from Autism Speaks MSSNG and Simons Foundation Autism Research Initiative) with 19 rare, damaging DDX53 variations (mostly maternally inherited). No functional evidence. Sources: Literature |
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| Mendeliome v1.2197 | RUNX1T1 |
Chirag Patel gene: RUNX1T1 was added gene: RUNX1T1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RUNX1T1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: RUNX1T1 were set to PMID: 39568205, 19172993, 22644616, 31223340 Phenotypes for gene: RUNX1T1 were set to Neurodevelopmental disorder MONDO:0700092 Review for gene: RUNX1T1 was set to GREEN Added comment: RUNX1T1 encodes a transcription regulator for hematopoietic genes and is well-known for its involvement in hematologic malignancies. Germline RUNX1T1 variants may also play a role in human congenital neurodevelopmental disorders. PMID: 39568205 3 unrelated individuals with developmental delay, learning disability, ASD, ADHD, and dysmorphism (1 x heart defects). Trio WES identified de novo variants in RUNX1T1 gene (1 x nonsense variant in 5' region [p.Gln36Ter], 2 x missense variants in C-terminus [p.Gly412Arg and p.His521Tyr]). PMID: 19172993 1 individual with mild-moderate ID and congenital heart disease, and chromosome t(5;8)(q32;q21.3) translocation. Molecular characterization revealed that one of the break points was within the RUNX1T1 gene. Analysis of RUNX1T1 expression in human embryonic and fetal tissues suggests a role of RUNX1T1 in brain and heart development. PMID: 22644616 1 individual with mild ID and dysmorphism, and de novo deletion exons 3-7 in RUNX1T1. PMID: 31223340 1 individual with ID, anaemia, atrial septal defect, dysmorphism, and seizures. Found to have a 2.1 Mb deletion at 8q21.3q22.1 involving entire RUNX1T1 gene (and 2 adjacent genes - SLC26A7 and TRIQK), and a benign familial 4.3 Mb duplication at 1p22.1p21.3 (present in unaffected healthy brother). Sources: Literature |
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| Mendeliome v1.2167 | WDR47 |
Bryony Thompson gene: WDR47 was added gene: WDR47 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: WDR47 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: WDR47 were set to 39609633; 35474353 Phenotypes for gene: WDR47 were set to Complex neurodevelopmental disorder MONDO:0100038, WDR47-related; Congenital heart disease MONDO:0005453 Review for gene: WDR47 was set to GREEN Added comment: PMID: 39609633 - 7 cases from 5 unrelated families with biallelic variants and a complex neurodevelopmental syndrome. The most frequent phenotypes were corpus callosum dysgenesis (7/7), microcephaly (7/7), mild to severe intellectual disability (7/7), epilepsy (7/7). Additionally, mouse models recapitulate the human phenotype. Loss of function is the mechanism of disease. Heterozygous parents had no phenotype. Limited evidence for mono allelic association with congenital heart defects PMID: 35474353 - rare assumed de novo heterozygous variant (NM_014969.5:c.2056G>A p.(Val686Ile) - 10 hets in gnomAD v4.1) detected in a case with heterotaxy including AVCD, vena azygos continuation, artery lusoria, truncus bicaroticus and polysplenia. Screening of exams for 2,019 individuals with situs inversus totalis, heterotaxy, or isolated CHD detected 2 additional individuals with monoallelic rare missense variants. No functional assays or other supporting evidence. All variants are VUS Sources: Literature |
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| Mendeliome v1.2111 | TSHZ3 |
Bryony Thompson gene: TSHZ3 was added gene: TSHZ3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TSHZ3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: TSHZ3 were set to 27668656; 34919690; 36553458; 39420202 Phenotypes for gene: TSHZ3 were set to congenital anomaly of kidney and urinary tract MONDO:0019719 Review for gene: TSHZ3 was set to AMBER Added comment: More evidence for the gene-disease association is required PMID: 27668656 - TSHZ3 is included in the region deleted in chromosome 19q13.11 Deletion Syndrome, which includes intellectual disability and behavioural issues, congenital anomalies of the kidney and urinary tract (CAKUT) PMID: 34919690 - haploinsufficient mouse model leads to kidney defects PMID: 36553458 - heterozygous frameshift variant c.119_120dup p.Pro41SerfsTer79 in a case with intellectual disability, behavioural issues, pyelocaliceal dilatation, and mild urethral stenosis. PMID: 39420202 - 12 CAKUT patients from 9/301 (3%) families carried 5 different rare heterozygous TSHZ3 missense variants. However, 1 of the variants (p.Ser58Gly) present in 5 of the families is more common in gnomAD v4.1 than you would expect for a dominant disease including 5 homozygotes (1,408/1,612,114 alleles, 5 hom, AF=0.0008734). The authors state this is not unexpected in a condition, such as CAKUT. However, the different missense variants are inherited from unaffected parents in at least 2/9 families (there was no phenotype information available for an additional 3 parents). Sources: Literature |
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| Mendeliome v1.1998 | MED16 |
Mark Cleghorn gene: MED16 was added gene: MED16 was added to Mendeliome. Sources: Other Mode of inheritance for gene: MED16 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: MED16 were set to complex neurodevelopmental disorder MONDO:0100038 Review for gene: MED16 was set to GREEN Added comment: Charlotte Guillouet, Imagine institute Paris ESHG presentation 4/6/24, unpublished MED16 is part of tail of ‘mediator complex’ Plays a role in enhancer/promotor regions Disruptive variants in other genes encoding proteins within this mediator complex (MED11/12/12/17/20, CDK8) are assoc w neurodevelopmental/neurodegenerative disorders Cases index family Sibs (M/F) to consanguineous parents w NDD/mod ID, tetralogy of Fallot or VSD, bilat deafness, micrognathia, malar hypoplasia, dental AbN, pre auricular tags, hypoplastic nails, brachydactly WES: biallelic MED16 p.Asp217Asn Via genematcher 16 families total, 22 individuals, homozygous or compound het rare MED16 variants Mixture of pLoF and missense variants Motor delay in 16/17 DD or ID in 17/17 Speech delay in 15/15 6/19 ToF 7/19 other septal/aortic defects 6/18 deafness 11/18 microretrognathia 6/17 cleft palate 8/19 preauricular tags 9/20 puffy eyelids 12/20 nasal dysplasia (most commonly short columella w bulbous nasal tip) 7/20 corpus callosum anomalies Not clear that functional work recapitulated phenotype as yet? Immunofluroescence on HeLa cells transfected with variants observed ?conclusion MED16 knockout mouse > growth delay, pre weaning lethality MED16 knockout zebrafish > reduced body length, early death, no obvious craniofacial phenotype Sources: Other |
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| Mendeliome v1.1992 | RFC4 |
Chirag Patel gene: RFC4 was added gene: RFC4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RFC4 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RFC4 were set to PMID: 39106866 Phenotypes for gene: RFC4 were set to RFC4-related multisystem disorder Review for gene: RFC4 was set to GREEN gene: RFC4 was marked as current diagnostic Added comment: 9 affected individuals (aged birth to 47yrs) from 8 unrelated families with a multisystem disorder. Clinical features included: muscle weakness/myopathy (9/9), motor incoordination/gait disturbance (8/8), delayed gross motor development (6/9), dysarthria (5/5), peripheral neuropathy (3/3 adults), bilateral sensorineural hearing impairment (6/9), decreased body weight (8/9), short stature (5/9), microcephaly (4/9), respiratory issues/insufficiency (6/9), cerebellar atrophy (4/9), pituitary hypoplasia (3/9). WES or WGS identified biallelic loss-of-function variants in RFC4 (3 frameshift, 2 splice site, 1 single AA duplication, 2 single AA deletions, 2 missense), and almost all are likely to disrupt the C-terminal domain indispensable for Replication factor C (RFC) complex formation. All variants segregated with the disease. The RFC complex (with 5 subunits) is central to process of regulation of DNA replication, and it loads proliferating cell nuclear antigen onto DNA to facilitate the recruitment of replication and repair proteins and enhance DNA polymerase processivity. RFC1 is associated with CANVAS but the contributions of RFC2-5 subunits on human Mendelian disorders is unknown. Analysis of a previously determined cryo-EM structure of RFC bound to proliferating cell nuclear antigen suggested that the variants disrupt interactions within RFC4 and/or destabilize the RFC complex. Cellular studies using RFC4-deficient HeLa cells and primary fibroblasts demonstrated decreased RFC4 protein, compromised stability of the other RFC complex subunits, and perturbed RFC complex formation. Additionally, functional studies of the RFC4 variants affirmed diminished RFC complex formation, and cell cycle studies suggested perturbation of DNA replication and cell cycle progression. Sources: Literature |
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| Mendeliome v1.1978 | TMEM216 |
Zornitza Stark edited their review of gene: TMEM216: Added comment: PMID 39191256: Two rare nucleotide substitutions at the same genomic location on chromosome 11 (g.61392563 [GRCh38]), 69 base pairs upstream of the start codon of the ciliopathy gene TMEM216 (c.-69G>A, c.-69G>T [GenBank: NM_001173991.3]) found in individuals of South Asian and African ancestry, respectively. This included 71 homozygotes and 3 mixed heterozygotes in trans with a predicted loss-of-function allele. Haplotype analysis showed single-nucleotide variants (SNVs) common across families, suggesting ancestral alleles within the two distinct ethnic populations. Clinical phenotype analysis of 62 available individuals from 49 families indicated a similar clinical presentation with night blindness in the first decade and progressive peripheral field loss thereafter. No evident systemic ciliopathy features were noted. Functional characterization of these variants by luciferase reporter gene assay showed reduced promotor activity.; Changed publications: 20036350, 20512146, 39191256; Changed phenotypes: Joubert syndrome 2, MIM# 608091, MONDO:0011963, Meckel syndrome 2, MIM# 603194, MONDO:0011296, Retinitis pigmentosa, MONDO:0019200, TMEM216-related |
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| Mendeliome v1.1974 | ATP6V1C1 |
Ain Roesley gene: ATP6V1C1 was added gene: ATP6V1C1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ATP6V1C1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: ATP6V1C1 were set to 39210597 Review for gene: ATP6V1C1 was set to AMBER gene: ATP6V1C1 was marked as current diagnostic Added comment: 1x de novo missense p.Glu289Lys (absent in v4 gnomad). Manual inspection of IGV found the dad was mosaic 7% VAF and he shared some of the clinical features (minor digit anomalies). Some functional studies using patient fibroblasts were performed, demonstrating similar effects as known pathogenic variants in ATP6V1B2. - lysosomal morphology - autophagic flux dysregulation - increased acidification of lysosome borderline red/amber Sources: Literature |
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| Mendeliome v1.1790 | ZNF41 |
Zornitza Stark gene: ZNF41 was added gene: ZNF41 was added to Mendeliome. Sources: Expert Review disputed tags were added to gene: ZNF41. Mode of inheritance for gene: ZNF41 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: ZNF41 were set to 14628291; 23871722 Phenotypes for gene: ZNF41 were set to non-syndromic X-linked intellectual disability MONDO:0019181 Review for gene: ZNF41 was set to RED Added comment: DISPUTED by ClinGen. Shoichet et al. (2003) described a female patient with severe nonsyndromic mental retardation and a de novo balanced translocation t(X;7)(p11.3;q11.21) in whom they cloned the DNA fragment that contained the X chromosomal and the autosomal breakpoint. In silico sequence analysis demonstrated that the ZNF41 gene was disrupted. Expression studies indicated that ZNF41 transcripts were absent in the patient cell line, suggesting that the mental disorder in this patient resulted from loss of functional ZNF41. Screening of patients with mental retardation led to the identification of 2 other ZNF41 mutations that were not found in healthy control individuals. Based on their finding of the mutations in ZNF41 identified by Shoichet et al. (2003) in a total of 7 males in the NHLBI Exome Variant Server, and the additional finding of truncating ZNF41 variants in 1 male and 1 female in that database, Piton et al. (2013) classified the involvement of ZNF41 in mental retardation as highly questionable. Sources: Expert Review |
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| Mendeliome v1.1786 | AVPR1A |
Zornitza Stark gene: AVPR1A was added gene: AVPR1A was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: AVPR1A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: AVPR1A were set to 24924430 Phenotypes for gene: AVPR1A were set to Autism spectrum disorder MONDO:0005258 Review for gene: AVPR1A was set to RED Added comment: DISPUTED by ClinGen: The Arginine Vasopressin Receptor 1A (AVPR1A) was considered a candidate gene in autism spectrum disorder (ASD) based on reports focused on linkage intervals and animal models. Additionally, experimental evidence showed that AVPR1A is possibly involved in social behaviors, including affiliation and attachment (PMID: 24924430). However, these association studies were underpowered—sequencing more individuals may have identified variants of functional significance. In two studies, transmission disequilibrium between AVPR1A microsatellites and autism were found but most were not statistically significant (PMID: 12082568, 16520824). In another study, investigators screened AVPR1A exons in 125 independent autistic probands (PMID: 15098001). However, the study did not demonstrate a disease-causing variant in the coding sequence, and the authors noted that differences in AVPR1A at the amino-acid level are unlikely to confer genetic vulnerability to autism. Experimental evidence is available, but, in the absence of human genetic evidence, such data were not utilized in the scoring. In summary, there is no valid genetic evidence to support an association between AVPR1A and autism spectrum disorder. Sources: Expert list |
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| Mendeliome v1.1763 | DAGLA |
Zornitza Stark gene: DAGLA was added gene: DAGLA was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DAGLA was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: DAGLA were set to 35737950 Phenotypes for gene: DAGLA were set to Neuroocular syndrome 2, paroxysmal type, MIM# 168885 Review for gene: DAGLA was set to GREEN Added comment: 9 individuals from 8 families reported with daily paroxysmal spells characterized by eye deviation or nystagmus with abnormal head posturing apparent from birth or early infancy. The episodes tend to be triggered after sleeping, and most patients show improvement of the ocular symptoms over time. Affected individuals also have hypotonia, mild developmental delay, dysarthria, and gait ataxia; most have mildly impaired intellectual development. Seizures are not observed. Sources: Literature |
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| Mendeliome v1.1727 | SRPK3 |
Zornitza Stark gene: SRPK3 was added gene: SRPK3 was added to Mendeliome. Sources: Literature digenic tags were added to gene: SRPK3. Mode of inheritance for gene: SRPK3 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: SRPK3 were set to 38429495 Phenotypes for gene: SRPK3 were set to Myopathy, MONDO:0005336, digenic SRPK3- and TTN-related Review for gene: SRPK3 was set to GREEN Added comment: 33 individuals reported with SRPK3 variants but myopathy only occurred when TTN variant also present (most truncating). Zebrafish model supports digenic model of inheritance. Sources: Literature |
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| Mendeliome v1.1696 | PTCRA |
Achchuthan Shanmugasundram gene: PTCRA was added gene: PTCRA was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PTCRA was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PTCRA were set to 38422122 Phenotypes for gene: PTCRA were set to Autoimmunity, HP:0002960; lymphopenia, MONDO:0003783 Review for gene: PTCRA was set to GREEN Added comment: PMID:38422122 reported the identification of 10 individuals from seven kindreds from four different ethnicities with biallelic PTCRA variants (homozygous in five kindreds and compound heterozygous in two kindreds). Six of these 10 patients were clinically asymptomatic at their most recent evaluation, while other four patients displayed infection, lymphoproliferation, and/or autoimmunity with an onset during their teens or in adulthood. One of these patients died from SARS-CoV-2 pneumonia at the age of 24 years. Patient 9 had a small thymus on MRI at the age of 2 years, whereas P5 and P6 had no visible thymus at the ages of 13 and 8 years, respectively. Three of the nine patients with pLOF PTCRA variants tested were found to produce autoantibodies, several of which were associated with clinical manifestations. Anti-thyroid autoantibodies and/or clinically overt thyroiditis were found in three of the nine patients. P7, who suffered from recurrent herpes infections, had autoantibodies against type I interferons. Two of those identified variants are hypomorphic and are associated with autoimmunity. In addition, there is extensive functional and epidemiological data available. 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 v1.1587 | APOLD1 |
Lucy Spencer changed review comment from: PMID: 35638551 1 family with an atypical inherited bleeding disorder characterised by severe spontaneous bleeding episodes in childhood and microcirculatory problems. 4 affected individuals across 2 generations have R49*in APOLD1, another affected individual from a third generation was not able to be sequenced = 4 meiosis. 4 unaffected individuals did not have the variant. This gene has no NMD region, R49* would affect 82% of the protein. Paper is not using the MANE select transcript, alt p. in MANE select is R18* which affects 92% of the MANE select protein Interestingly R49* is created by a delins/2 missense in cis, 1 common R49Q and 1 rare R49W, some UNaffected family members just have the common missense without the other in cis. Immunofluorescence studies in patient platelets showed a 50% reduction of APOLD1 and disrupted cytoskeletal and junctional organization. Sources: Literature; to: PMID: 35638551 1 family with an atypical inherited bleeding disorder characterised by severe spontaneous bleeding episodes in childhood and microcirculatory problems. 4 affected individuals across 2 generations have R49*in APOLD1, another affected individual from a third generation was not able to be sequenced = 4 meiosis. 4 unaffected individuals did not have the variant. This gene has no NMD region, R49* would affect 82% of the protein. Paper is not using the MANE select transcript, alt p. in MANE select is R18* which affects 92% of the MANE select protein Interestingly R49* is created by a delins/2 missense in cis, 1 common R49Q and 1 rare R49W, some UNaffected family members just have the common missense without the other in cis. Immunofluorescence studies in patient platelets showed a 50% reduction of APOLD1 and disrupted cytoskeletal and junctional organization. SiRNA silencing of APOLD1 in HBDEC cells resulted in altered cell shape and size, and were associated with endothelial cell junction dismantling. These cells were also almost devoid of VWF. Sources: Literature |
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| Mendeliome v1.1583 | DIP2C |
Melanie Marty gene: DIP2C was added gene: DIP2C was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DIP2C was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: DIP2C were set to PMID: 38421105 Phenotypes for gene: DIP2C were set to Neurodevelopmental disorder (MONDO#0700092), DIP2C-related Review for gene: DIP2C was set to GREEN Added comment: PMID: 38421105 - Twenty three patients with het DIP2C variants (10 de novo). All patients had developmental delays affecting expressive language and speech, most had mild dev delay and ID. Four patients had seizures. Additional phenotypic findings were non-specific but recurrent anomalies did include a high anterior hair-line, prominent forehead, and a broad nasal tip. Four patients had cardiac defects (hypertrophic cardiomyopathy, atrial septal defects,and bicuspid aortic valve) Sources: Literature |
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| Mendeliome v1.1501 | CAMK2D |
Elena Savva gene: CAMK2D was added gene: CAMK2D was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CAMK2D was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: CAMK2D were set to 38272033 Phenotypes for gene: CAMK2D were set to Neurodevelopmental disorder (MONDO#0700092), CAMK2D-related Added comment: PMID: 38272033 - 8 patients (5/8 de novo) with mostly missense and a single splice site variant, ages range from 5 weeks to 20 years old - Most variants functionally shown to have a GOF mechanism causing addition DCM phenotype, LOF is only neurological - Phenotypes include dev delay (mild-severe) (7/7 patients), skeletal anomalies (7/8, scoliosis, kyphosis, involving spine/hands/feet/palate), DCM (6/8), seizures (3/8), visual anomalies (astigmatism, cortical vision impairment, myopia, strabismus 5/5), enlarged brain ventricles (3/5) Sources: Literature |
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| Mendeliome v1.1449 | PRICKLE1 | Zornitza Stark edited their review of gene: PRICKLE1: Added comment: Note all ClinVar entries for this gene are VOUS/LB/B. The variants reported in bi-allelic cases are almost all missense without further supportive data.; Changed rating: AMBER | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1408 | CEP192 |
Chern Lim gene: CEP192 was added gene: CEP192 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CEP192 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: CEP192 were set to 37981762 Phenotypes for gene: CEP192 were set to microcephaly, short stature, limb-extremity dysplasia, and reduced testicular size Review for gene: CEP192 was set to RED gene: CEP192 was marked as current diagnostic Added comment: PMID: 37981762: - In one family, chet missense p.His638Tyr and p.Asn1917Ser segregated with microcephaly, short stature, limb-extremity dysplasia, and reduced testicular size in two affected siblings. Both sibs also fulfilled dx for mosaic variegated aneuploidy (MVA) syndrome and have tetraploidy. - A lower but substantial proportion of MVA/tetraploidy cells was observed in II-1, II-2, and II-4 (who are het for one of the variants). - In the same family, each variants in heterozygous state segregated with infertility and/or reduced testicular size in the proband’s father and maternal uncle. - Variant screening of CEP192 coding regions performed for 1264 unrelated males with idiopathic infertility. - Asn1917Ser was also detected in three additional unrelated infertile males with reduced testicular volumes. - Two other missense and two synonymous variants were repeatedly detected in infertile males. - qPCR showed CEP192 expression was decreased in individuals with c.1912C>T His638Tyr, mini-gene assay showed that c.1912C>T His638Tyr led to the skipping of exon 14, predicted to result in NMD. - Epithelial cells cultured in vitro from patients with biallelic variants showed the number of cells arrested during the prophase increased because of the failure of spindle formation. - Embyronic mouse lethality in Cep192-/- (hom for His638Tyr), Cep192M/M (hom for Asn1917Ser) and Cep192-/M (chet). - Embryos of Cep192M/M mice had significant increase of MVA and tetraploidy cells. - Number of apoptotic cells increased in Cep192M/M embryos compared with that of Cep192+/+, similar result in Cep192-/- embryos. - Male mice with Cep192 heterozygous variants replicated infertility Conclusions: - Association of this gene with autosomal recessive disease has not been established. - Association of monoallelic variants in this gene with infertility is not well established: - Two variants with some supportive evidence from mouse model. Sources: Literature |
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| Mendeliome v1.1401 | MARK4 |
Rylee Peters changed review comment from: Missense variant, c.604T>C; p.Phe202Leu, identified in two siblings with childhood-onset neurodevelopmental disorder characterised by global developmental delay, intellectual disability, behavioural abnormalities, and dysmorphic features. The variant is located in the catalytic domain of the kinase, and is inherited from unaffected mosaic mother. Functional investigation revealed that the variant results in a gain-of-function in the ability of MARK4 to phosphorylate tau and leads to up-regulation of the mTORC1 pathway. Sources: Literature; to: Heterozygous missense variant, c.604T>C; p.Phe202Leu, identified in two siblings with childhood-onset neurodevelopmental disorder characterised by global developmental delay, intellectual disability, behavioural abnormalities, and dysmorphic features. The variant is located in the catalytic domain of the kinase, and is inherited from unaffected mosaic mother. Functional investigation revealed that the variant results in a gain-of-function in the ability of MARK4 to phosphorylate tau and leads to up-regulation of the mTORC1 pathway. Sources: Literature |
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| Mendeliome v1.1401 | MARK4 |
Rylee Peters gene: MARK4 was added gene: MARK4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MARK4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MARK4 were set to PMID: 38041405 Phenotypes for gene: MARK4 were set to neurodevelopmental disorder (MONDO:0700092), MARK4-related Mode of pathogenicity for gene: MARK4 was set to Other Review for gene: MARK4 was set to AMBER gene: MARK4 was marked as current diagnostic Added comment: Missense variant, c.604T>C; p.Phe202Leu, identified in two siblings with childhood-onset neurodevelopmental disorder characterised by global developmental delay, intellectual disability, behavioural abnormalities, and dysmorphic features. The variant is located in the catalytic domain of the kinase, and is inherited from unaffected mosaic mother. Functional investigation revealed that the variant results in a gain-of-function in the ability of MARK4 to phosphorylate tau and leads to up-regulation of the mTORC1 pathway. Sources: Literature |
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| Mendeliome v1.1401 | SEL1L |
Sarah Pantaleo gene: SEL1L was added gene: SEL1L was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SEL1L was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SEL1L were set to PMID: 37943610; PMID: 37943617 Phenotypes for gene: SEL1L were set to Neurodevelopmental disorder, MONDO:0700092, SEL1L-related Penetrance for gene: SEL1L were set to Complete Added comment: Wang paper PMID: 37943610 SEL1L protein is involved in the SEL1L-HRD1 endoplasmic reticulum (ER)-associated degradation. Report two biallelic missense variants in SEL1L in six children from three independent families presenting with developmental delay, intellectual disability, microcephaly, facial dysmorphisms, hypotonia and/or ataxia (termed ERAD-associated neurodevelopment disorder with onset in infancy (ENDI). The variants were hypomorphic and impaired ERAD function. Identified by WES. Parents heterozygous and asymptomatic. P.(Gly585Asp) in Patient 1, p.(Met528Arg) in Patients 2 and 3 (siblings). All variants cause substrate accumulation. The extent of substrate accumulation in knockin cells was modest compared to those in knockout cells, pointing to a hypomorphic nature. They also had a variant in HRD1. Weis paper PMID: 37943617 Third variant p.(Cys141Tyr), biallelic, causing premature death in five patients from a consanguineous family with early-onset neurodevelopmental disorders and agammaglobulinaemia due to severe SEL1L-HRD1 ERAD dysfunction. This variant appears to have a more severe outcome, exhibiting B cell depletion and agammaglobulinaemia, causing the most severe dysfunction among all of the variants described by this group so far. They postulate that functionality of SEL1L-HRD1 ERAD is inversely correlated with disease severity in humans. Their symptoms were dev delay, neurological disorder and agammaglobulinaemia in childhood. Along with severe axial hypotonia, short stature and microcephaly. “Not a complete loss-of-function variant”. Sources: Literature |
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| Mendeliome v1.1319 | PTPN4 |
Bryony Thompson changed review comment from: >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; to: >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 PMID: 34527963 - 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 |
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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 v1.1201 | AXL | Zornitza Stark Phenotypes for gene: AXL were changed from Kallman syndrome; normosmic idiopathic hypogonadotropic hypogonadism to Kallman syndrome, MONDO:0018800, AXL-related; normosmic idiopathic hypogonadotropic hypogonadism | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.966 | ZNF808 |
Hazel Phillimore gene: ZNF808 was added gene: ZNF808 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ZNF808 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ZNF808 were set to PMID: 37308312 Phenotypes for gene: ZNF808 were set to non-syndromic neonatal diabetes; MONDO:0016391 Review for gene: ZNF808 was set to GREEN Added comment: PMID: 37308312; Alqahtani, MA. et al. (2023) Clin Genet. doi: 10.1111/cge.14389. Three siblings in one consanguineous Saudi Arabian family with non-syndromic neonatal diabetes, all with a homozygous frameshift variant, NM_001321425.2:c.1448dupA, p.(Tyr483*), in ZNF808. (Same nucleotide and amino acid numbering as for the MANE SELECT transcript, NM_001039886.4). This variant has been entered as likely pathogenic in ClinVar by this group. This variant occurs in the last exon of the gene and is therefore not NMD-predicted. Instead it is predicted to cause a truncated protein. This paper shows a diagram with several other truncating variants in this exon, which were reported in the paper by De Franco, E. et al. (2021). (These patients also had low vitamin D levels, suggesting an association, and is consistent with other studies looking into loci that are associated with vitamin D). De Franco, E. et al. (2021) medRxiv 08.23.21262262. (Exeter, UK): Firstly, this group found a homozygous variant NM_001039886.3:c.637del, p.(Leu213*) that is predicted to cause a truncated protein, and also a homozygous CNV Chr19(GRCh37):g.53057128_53100968del (predicted to cause a deletion of exons 4 and 5) in two unrelated affected individuals. These patients had pancreatic agenesis, defined as insulin-dependent diabetes in the first 6 months of life (neonatal diabetes) and exocrine pancreatic insufficiency. Both were from consanguineous families. Parents were subsequently tested and shown to be heterozygous carriers. They then investigated 232 additional patients who had been diagnosed with neonatal diabetes before the age of 6 months and found ten more homozygous ZNF808 variants. Six were nonsense: p.(Gln194*), p.(Cys233*), p.(Tyr427*), p.(Lys458*), p.(Tyr528*) and p.(Arg727*), and three were frameshift variants: p.(Ala379Valfs*157), p.(Leu588Profs*118), p.(Asn770Ilefs*98) and one was a whole-gene deletion. All the frameshift and nonsense variants occurred in the last exon of the gene, which contains all 23 zinc finger domains; and therefore all of these variants are predicted to result in truncated proteins, and removal of some, if not all, those domains. This group also carried out functional studies using an in vitro model of pancreas development and showed an aberrant activation of many transposable elements (mostly MER11 elements) that would be normally be repressed during early pancreas development. Sources: Literature |
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| Mendeliome v1.921 | MOS | Zornitza Stark Marked gene: MOS as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.921 | MOS | Zornitza Stark Gene: mos has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.921 | MOS | Zornitza Stark Phenotypes for gene: MOS were changed from Early embryonic arrest and fragmentation; infertility to Infertility disorder, MONDO:0005047, MOS-related; Early embryonic arrest and fragmentation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.920 | MOS | Zornitza Stark Classified gene: MOS as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.920 | MOS | Zornitza Stark Gene: mos has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.915 | MOS |
Melanie Marty gene: MOS was added gene: MOS was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MOS was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MOS were set to PMID: 34779126; PMID: 34997960; PMID: 36403623; PMID: 35670744 Phenotypes for gene: MOS were set to Early embryonic arrest and fragmentation; infertility Review for gene: MOS was set to GREEN Added comment: PMID: 34779126: 3 x females with infertility with biallelic MOS variants identified. Using oocyte-specific Erk1/2 knockout mice, they verified that MOS-ERK signal pathway inactivation in oocytes caused early embryonic arrest and fragmentation. PMID: 34997960: 2 x females with biallelic MOS variants. Functional studies showed a reduction of protein for two of these variants (missense and frameshift). Functional studies also showed these variants reduced the ability of MOS to phosphorylate its downstream target, extracellular signal-regulated kinase 1/2. PMID: 35670744 1 x additional family (twins) with infertility and abnormal oocyte morphology with large first polar body. Functional studies showed the MOS variants could not activate MEK1/2 and ERK1/2 in oocytes and HEK293 cells. In addition, functional studies also showed when compared with wild-type MOS, the MOS variants decreased the MOS protein level and attenuated the binding capacity with MEK1. PMID: 36403623 1 x female with primary infertility, patient’s oocytes had a large polar body and poor embryonic development, hom missense variant in MOS identified. Sources: Literature |
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| Mendeliome v1.898 | POU3F2 |
Sarah Pantaleo gene: POU3F2 was added gene: POU3F2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: POU3F2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: POU3F2 were set to PMID: 37207645 Phenotypes for gene: POU3F2 were set to Autism spectrum disorder, NDD, and adolescent-onset obesity Penetrance for gene: POU3F2 were set to unknown Mode of pathogenicity for gene: POU3F2 was set to Other Review for gene: POU3F2 was set to GREEN Added comment: We associate ultra-rare variants in POU3F2, encoding a central nervous system transcription factor, with syndromic obesity and neurodevelopment delay in 12 individuals. Demonstrate variant pathogenicity through in vitro analysis. Used exome sequencing, GeneMatcher and Genomics England 100,000 Genomes Project rare disease database. Both truncating and missense variants in over 10 individuals sharing autism spectrum disorder, NDD, and adolescent-onset obesity (may have had other features eg. CAKUT in 2 individuals, diabetes in two) . Affected individuals presented with low-to-normal birth weight and infantile feeding difficulties but developed insulin resistance and hyperplasia during childhood. With the exception of an early truncating variant, the variants showed adequate nuclear translocation but overall disturbed DNA-binding ability and promoter activation. Variants absent from population and clinical databases. Almost all constituted putatively non-inherited de novo variants (8/10). Functional studies provide evidence for loss of function in eight and gain of function in one obesity-associated POU3F2 variant. One variant did not impact POU3F2-promoter activation, leaving the possibility for further path-mechanisms. Sources: Literature |
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| Mendeliome v1.836 | INTS11 |
Melanie Marty changed review comment from: PMID: 37054711 - 15 individuals from 10 unrelated families with bi-allelic variants in INTS11 with global developmental and language delay, intellectual disability, impaired motor development, and brain atrophy.; to: PMID: 37054711 - 15 individuals from 10 unrelated families with bi-allelic variants in INTS11 with global developmental and language delay, intellectual disability, impaired motor development, and brain atrophy. Functional studies in Drosophila showed that dIntS11 (fly ortholog of INTS11) is essential and expressed in the central nervous systems in a subset of neurons and most glia in larval and adult stages. |
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| Mendeliome v1.836 | SRSF1 |
Paul De Fazio gene: SRSF1 was added gene: SRSF1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SRSF1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: SRSF1 were set to 37071997 Phenotypes for gene: SRSF1 were set to Neurodevelopmental disorder, SRSF1-related MONDO:0700092 Review for gene: SRSF1 was set to GREEN gene: SRSF1 was marked as current diagnostic Added comment: 17 individuals from 16 families reported with mostly de novo variants. Variants were a mixture of missense, nonsense/frameshift (both NMD-predicted and not NMD-predicted) and microdeletions. In one family, only one parent was available for testing. In another family, 2 affected siblings had the variant but the variant was not identified in either parent suggesting germline mosaicism. Functional testing of a subset of variants in Drosophila supported pathogenicity in most, but 2 missense variants showed no functional effect and were classified VUS. Episignature analysis (EpiSign) on patient DNA from blood showed a specific DNA methylation signature in patients with the variants classified pathogenic but not those classified VUS. Phenotypes included mainly neurological abnormalities (mild to moderate ID/dev delay, motor delay, speech delay, and behavioural disorders) and facial dysmorphisms. Other features included hypotonia (11/16), variable brain abnormalities on MRI (6/12), variable cardiac malformations (6/14). urogenital malformations e.g. hypospadias, cryptorchidism (6/13), scoliosis (5/17) and/or variable other skeletal abnormalities (10/17). Sources: Literature |
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| Mendeliome v1.819 | INTS11 |
Achchuthan Shanmugasundram gene: INTS11 was added gene: INTS11 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: INTS11 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: INTS11 were set to 37054711 Review for gene: INTS11 was set to GREEN Added comment: Comment on gene rating: This gene should be rated GREEN in Intellectual disability panel as it has 10 unrelated cases and functional evidence in support of this association. PMID:37054711 reported ten unrelated families with biallelic variants in INTS11 gene and they present with intellectual disability, global developmental and language delay, impaired motor development, and brain atrophy. Functional studies in Drosophila showed that dIntS11 (fly ortholog of INTS11) is essential and expressed in the central nervous systems in a subset of neurons and most glia in larval and adult stages. In addition, genes with two variants (p.Arg17Leu and p.His414Tyr) fail to rescue the lethality of null mutants in the Drosophila model, indicating that they are strong loss-of-function variants. The other five variants (p.Gly55Ser, p.Leu138Phe, p.Lys396Glu, p.Val517Met and p.Ile553Glu) rescue lethality but cause a shortened lifespan and bang sensitivity and affect locomotor activity, indicating that they are partial loss-of-function variants. Sources: Literature |
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| Mendeliome v1.763 | PPCDC |
Bryony Thompson gene: PPCDC was added gene: PPCDC was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PPCDC was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PPCDC were set to 36564894 Phenotypes for gene: PPCDC were set to dilated cardiomyopathy MONDO:0005021 Review for gene: PPCDC was set to RED Added comment: Single family reported with two siblings with a fatal cardiac phenotype including dilated cardiomyopathy with biallelic variants p.Thr53Pro and p.Ala95Val. Patient-derived fibroblasts showed an absence of PPCDC protein, and nearly 50% reductions in CoA levels. The cells showed clear energy deficiency problems, with defects in mitochondrial respiration, and mostly glycolytic ATP synthesis. Functional studies performed in yeast suggest these mutations to be functionally relevant. Sources: Literature |
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| Mendeliome v1.702 | PLXND1 |
Achchuthan Shanmugasundram changed review comment from: 10 individuals including four foetal cases from five unrelated families were identified with biallelic variants in PLXND1 gene and they presented with cardiac defects. The most frequent defect is common arterial trunk (CAT), which is also known as truncus arteriosus, a conotruncal malformation characterized by a single vessel exiting both ventricles. This gene has already been associated with PLXND1-related cardiac malformation syndrome with the confidence category of 'strong' in DD panel of Gene2Phenotype. However, no relevant phenotypes have been currently reported in OMIM.; to: 10 individuals including four foetal cases from five unrelated families were identified with biallelic variants in PLXND1 gene and they presented with cardiac defects. The most frequent defect is common arterial trunk (CAT), which is also known as truncus arteriosus, a conotruncal malformation characterized by a single vessel exiting both ventricles. This gene has already been associated with PLXND1-related cardiac malformation syndrome with the confidence category of 'strong' in DD panel of Gene2Phenotype. However, no relevant phenotypes have been currently reported in OMIM. |
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| Mendeliome v1.702 | PLXND1 |
Achchuthan Shanmugasundram changed review comment from: 10 individuals including four foetal cases from five unrelated families were identified with biallelic variants in PLXND1 gene and they presented with cardiac defects. The most frequent defect is common arterial trunk (CAT), which is also known as truncus arteriosus, a conotruncal malformation characterized by a single vessel exiting both ventricles.; to: 10 individuals including four foetal cases from five unrelated families were identified with biallelic variants in PLXND1 gene and they presented with cardiac defects. The most frequent defect is common arterial trunk (CAT), which is also known as truncus arteriosus, a conotruncal malformation characterized by a single vessel exiting both ventricles. This gene has already been associated with PLXND1-related cardiac malformation syndrome with the confidence category of 'strong' in DD panel of Gene2Phenotype. However, no relevant phenotypes have been currently reported in OMIM. |
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| Mendeliome v1.649 | RRAGD |
Hazel Phillimore changed review comment from: PMID: 34607910; Schlingmann, KP. et al. (2021) J Am Soc Nephrol. 32(11):2885-2899. Five missense variants in RRAGD identified in eight children (some early infant onset) from unrelated families. The variants were recurrent or affecting the same amino acid, i.e., p.S76L, S76W, p.T97P, p.P119L, p.P119R and p.I221K note: these are absent in gnomAD v2.1.1, and are very highly conserved residues. All variants are located in the N-terminal G-domain and affect sequence motifs involved in nucleotide binding The children had a tubulopathy characterised by hypomagnesemia, hypokalaemia, salt wasting, and nephrocalcinosis, and six had dilated cardiomyopathy. Most occurred de novo. Two were familial. One family with two affected siblings showed low level mosaicism in the mother. In vitro studies using transfected HEK293 cells showed increased binding to RPTOR and MTOR. Sources: Literature; to: PMID: 34607910; Schlingmann, KP. et al. (2021) J Am Soc Nephrol. 32(11):2885-2899. Six missense variants in RRAGD identified in eight children (some early infant onset) from unrelated families. The variants were recurrent or affecting the same amino acid, i.e., p.S76L, S76W, p.T97P, p.P119L, p.P119R and p.I221K note: these are absent in gnomAD v2.1.1, and are very highly conserved residues. All variants are located in the N-terminal G-domain and affect sequence motifs involved in nucleotide binding The children had a tubulopathy characterised by hypomagnesemia, hypokalaemia, salt wasting, and nephrocalcinosis, and six had dilated cardiomyopathy. Most occurred de novo. Two were familial. One family with two affected siblings showed low level mosaicism in the mother. In vitro studies using transfected HEK293 cells showed increased binding to RPTOR and MTOR. Sources: Literature |
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| Mendeliome v1.649 | RRAGD |
Hazel Phillimore gene: RRAGD was added gene: RRAGD was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RRAGD was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: RRAGD were set to PMID: 34607910 Phenotypes for gene: RRAGD were set to Kidney tubulopathy; dilated cardiomyopathy; hypomagnesaemia; renal salt-wasting; nephrocalcinosis Review for gene: RRAGD was set to GREEN Added comment: PMID: 34607910; Schlingmann, KP. et al. (2021) J Am Soc Nephrol. 32(11):2885-2899. Five missense variants in RRAGD identified in eight children (some early infant onset) from unrelated families. The variants were recurrent or affecting the same amino acid, i.e., p.S76L, S76W, p.T97P, p.P119L, p.P119R and p.I221K note: these are absent in gnomAD v2.1.1, and are very highly conserved residues. All variants are located in the N-terminal G-domain and affect sequence motifs involved in nucleotide binding The children had a tubulopathy characterised by hypomagnesemia, hypokalaemia, salt wasting, and nephrocalcinosis, and six had dilated cardiomyopathy. Most occurred de novo. Two were familial. One family with two affected siblings showed low level mosaicism in the mother. In vitro studies using transfected HEK293 cells showed increased binding to RPTOR and MTOR. Sources: Literature |
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| Mendeliome v1.628 | CCDC84 |
Lucy Spencer gene: CCDC84 was added gene: CCDC84 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CCDC84 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CCDC84 were set to 34009673 Phenotypes for gene: CCDC84 were set to Mosaic variegated aneuploidy syndrome 4 (MIM#620153) Review for gene: CCDC84 was set to AMBER Added comment: PMID: 34009673- patients with constitutional mosaic aneuploidy were found to have biallelic mutations in CENATAC(CCDC84). 2 adult siblings with mosaic aneuploidies, microcephaly, dev delay, and maculopathy. Both chet for a missense and a splice site deletion- but the paper days these both result in the creation of a novel splice site that leads to frameshifts and loss of the c-terminal 64 amino acids. Gene is shown to be part of a spliceosome. CENATAC depletion or expression of disease mutants resulted in retention of introns in ~100 genes enriched for nucleocytoplasmic transport and cell cycle regulation, and caused chromosome segregation errors. Functional analysis in CENATAC-depleted HeLa cells demonstrated chromosome congression defects and subsequent mitotic arrest, which could be fully rescued by wildtype but not mutant CENATAC. Expression of the MVA-associated mutants exacerbated the phenotype, suggesting that the mutant proteins dominantly repress the function of any residual wildtype protein. Sources: Literature |
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| Mendeliome v1.601 | UHRF1 | Zornitza Stark Phenotypes for gene: UHRF1 were changed from Multi locus imprinting disturbance in offspring to Multi locus imprinting disturbance in offspring; chromosome instability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.593 | UHRF1 | Chern Lim edited their review of gene: UHRF1: Changed publications: 36458887, 29574422; Changed phenotypes: chromosome instability, Multi locus imprinting disturbance in offspring; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.593 | UHRF1 |
Chern Lim edited their review of gene: UHRF1: Added comment: PMID: 36458887 Unoki et al. 2022 - One patient with compound het missense and nonsense variants, both parents are carriers (hets). - The patient has chromosome instability with hypomethylation of the pericentromeric satellite-2 repeats and facial anomalies as typical symptoms of the ICF syndrome, but did not exhibit immunodeficiency, and developed an adrenocortical adenoma; characteristics that were atypical. - Genome-wide methylation analysis revealed the patient had a centromeric/pericentromeric hypomethylation, which is the main ICF signature, but also had a distinctive hypomethylation pattern compared to patients with the other ICF syndrome subtypes. - Structural and biochemical analyses revealed that the R296W variant disrupted the protein conformation and strengthened the binding affinity of UHRF1 with its partner LIG1, and reduced ubiquitylation activity of UHRF1 towards its ubiquitylation substrates, histone H3 and PAF15.; Changed publications: 36458887; Changed phenotypes: chromosome instability; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal |
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| Mendeliome v1.573 | TUFT1 |
Zornitza Stark gene: TUFT1 was added gene: TUFT1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TUFT1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TUFT1 were set to https://doi.org/10.1093/bjd/ljac026 Phenotypes for gene: TUFT1 were set to Ectodermal dysplasia, MONDO:0019287, TUFT1-related Review for gene: TUFT1 was set to AMBER Added comment: 9 individuals from three families reported with woolly hair and skin fragility. One of the variants, c.60+1G>A was present in two of the families, founder effect demonstrated by haplotype analysis. Another loss of function variant present in the third family. Some functional data but mostly expression studies. Sources: Literature |
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| Mendeliome v1.572 | ZMYM3 |
Belinda Chong gene: ZMYM3 was added gene: ZMYM3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ZMYM3 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: ZMYM3 were set to 36586412; 24721225 Phenotypes for gene: ZMYM3 were set to Neurodevelopmental disorders (NDDs) Review for gene: ZMYM3 was set to GREEN Added comment: PMID: 36586412 Using the MatchMaker Exchange - Described 27 individuals with rare, variation in the ZMYM3. Most individuals were males, 17 of which have a maternally inherited variant; six individuals (4 male, 2 female) with de novo variants. Overlapping features included developmental delay, intellectual disability, behavioural abnormalities, and a specific facial gestalt in a subset of males. Variants in almost all individuals are missense, including six that recurrently affect two residues. Four unrelated probands were identified with inherited variation affecting Arg441 (R441W), a site at which variation has been previously seen in NDD-affected siblings (24721225), and two individuals have de novo variation resulting in p.Arg1294Cys (c.3880C>T). ChIP-seq experiments on one variant, p.Arg1274Trp, indicate dramatically reduced genomic occupancy, supporting a hypomorphic effect. Sources: Literature |
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| Mendeliome v1.507 | GABRA3 |
Sarah Pantaleo gene: GABRA3 was added gene: GABRA3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: GABRA3 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: GABRA3 were set to PMID: 29053855 Phenotypes for gene: GABRA3 were set to Epilepsy, intellectual disability, dysmorphic features, Penetrance for gene: GABRA3 were set to Incomplete Review for gene: GABRA3 was set to GREEN Added comment: Six variants in GABRA3 encoding the alpha3-subunit of the GABA(A) receptor. Five missense variants and one micro duplication were detected in four families and two sporadic cases presenting with a range of epileptic seizure types, a varying degree of intellectual disability and developmental delay, sometimes with dysmorphic features or nystagmus. The variants co-segregated mostly but not completely with the phenotype in the families, indicating in some cases incomplete penetrance, involvement of other genes, or presence of phenocopies. Overall, males were more severely affected and there were three asymptomatic female mutation carriers compared to only one male without a clinical phenotype. Mechanism suggested - three detected missense variants are localised in the extracellular GABA-binding NH2-terminus, one in the M2-M3 linker and one in the M4 transmembrane segment of the alpha3-subunit. Functional studies in Xenopus leaves oocytes revealed a variable but significant reduction of GABA-evoked anion currents for all mutants compared to wild-type receptors. The degree of current reduction correlated partially with the phenotype. Results reveal that rare loss-of-function variants in GABRA3 increase the risk for a varying combination of epilepsy, intellectual disability/developmental delay and dysmorphic features, presenting in some pedigrees with an X-linked inheritance pattern. 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 v1.472 | MTSS1 |
Zornitza Stark gene: MTSS1 was added gene: MTSS1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MTSS1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MTSS1 were set to 36067766 Phenotypes for gene: MTSS1 were set to Intellectual disability, MTSS1-related (MONDO#0001071) Review for gene: MTSS1 was set to GREEN Added comment: Five individuals with the same heterozygous de novo variant in MTSS2 (NM_138383.2: c.2011C>T [p.Arg671Trp]) identified by exome sequencing. The individuals presented with global developmental delay, mild intellectual disability, ophthalmological anomalies, microcephaly or relative microcephaly, and shared mild facial dysmorphisms. Immunoblots of fibroblasts from two affected individuals revealed that the variant does not significantly alter MTSS2 levels. We modeled the variant in Drosophila and showed that the fly ortholog missing-in-metastasis (mim) was widely expressed in most neurons and a subset of glia of the CNS. Loss of mim led to a reduction in lifespan, impaired locomotor behavior, and reduced synaptic transmission in adult flies. Expression of the human MTSS2 reference cDNA rescued the mim loss-of-function (LoF) phenotypes, whereas the c.2011C>T variant had decreased rescue ability compared to the reference, suggesting it is a partial LoF allele. However, elevated expression of the variant, but not the reference MTSS2 cDNA, led to similar defects as observed by mim LoF, suggesting that the variant is toxic and may act as a dominant-negative allele when expressed in flies. Sources: Literature |
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| Mendeliome v1.468 | SMC5 |
Zornitza Stark gene: SMC5 was added gene: SMC5 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SMC5 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SMC5 were set to 36333305 Phenotypes for gene: SMC5 were set to Multiple congenital anomalies/dysmorphic syndrome, MONDO:0019042, SLF2-related; Atelis syndrome; microcephaly; short stature; ID Review for gene: SMC5 was set to GREEN Added comment: Four individuals from three families with a chromosome breakage disorder and bi-allelic variants in this gene. However, three of the individuals had the same homozygous missense variant. Evidence for functional impact of the variant was limited. However, zebrafish model recapitulated the phenotype and was not rescued by the introduction of this variant, arguing for functional effect. Borderline Amber/Green Sources: Literature |
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| Mendeliome v1.466 | SLF2 |
Zornitza Stark gene: SLF2 was added gene: SLF2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SLF2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SLF2 were set to 36333305 Phenotypes for gene: SLF2 were set to Multiple congenital anomalies/dysmorphic syndrome, MONDO:0019042, SLF2-related; Atelis syndrome; microcephaly; short stature; ID Review for gene: SLF2 was set to GREEN Added comment: Seven individuals from 6 families with a chromosome breakage disorder and bi-allelic variants in this gene (LoF). Functional data including zebrafish model. Sources: Literature |
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| Mendeliome v1.372 | LETM1 |
Ee Ming Wong gene: LETM1 was added gene: LETM1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: LETM1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: LETM1 were set to 36055214 Phenotypes for gene: LETM1 were set to Mitochondrial disease MONDO#0044970, LETM1-related gene: LETM1 was marked as current diagnostic Added comment: -18 affected individuals from 11 unrelated families harbouring ultra-rare bi-allelic missense and loss-of-function LETM1 variants -Most of the affected individuals (14/18, 78%) had an infantile-onset disease manifestation, and 4/18 (22%) presented first symptoms between the ages of 1.5 and 2 years -Variant types included missense, frameshift, stop loss, in-frame deletion and splice defect -From biochemical and morphological studies, bi-allelic LETM1 variants are associated with defective mitochondrial K efflux, swollen mitochondrial matrix structures, and loss of important mitochondrial oxidative phosphorylation protein components Sources: Literature |
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| Mendeliome v1.348 | FOSL2 |
Krithika Murali gene: FOSL2 was added gene: FOSL2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FOSL2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: FOSL2 were set to 36197437 Phenotypes for gene: FOSL2 were set to Neurodevelopmental disorder, MONDO:0700092, FOSL2-related Review for gene: FOSL2 was set to GREEN Added comment: PMID 36197437 Cospain et al 2022 report 11 individuals from 10 families with heterozygous PTC variants in exon 4/4 of the FOSL2 gene. All variants were predicted to escape NMD resulting in a truncated protein, with the truncation occurring proximal to the C-terminal domain (supportive functional studies). In 10/11 families the variant occurred de novo in a single affected proband. In one family with 2 affected siblings, the variant was present in the siblings but absent in the unaffected parent likely due to gonadal mosaicism. Clinical features included: - Cutis aplasia congenital of the scalp (10/11) - Tooth enamel hypoplasia and discolouration (8/9) - Multiple other ectodermal features also noted e.g. small brittle nails, hypotrichosis/hypertrichosis, lichen sclerosis - 5 individuals had cataracts (mostly bilateral, congenital/early childhood onset) - 6/9 IUGR - 5/9 postnatal growth restriction - 7/9 developmental delay/ID - 5/7 ADHD/ASD - 2/9 seizures Sources: Literature |
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| Mendeliome v1.346 | COQ4 |
Zornitza Stark changed review comment from: Primary coenzyme Q10 deficiency-7 (COQ10D7) is an autosomal recessive disorder resulting from mitochondrial dysfunction. Most patients have onset of severe cardiac or neurologic symptoms soon after birth. IUGR reported. At least 9 unrelated families reported.; to: Primary coenzyme Q10 deficiency-7 (COQ10D7) is an autosomal recessive disorder resulting from mitochondrial dysfunction. Most patients have onset of severe cardiac or neurologic symptoms soon after birth. IUGR reported. At least 9 unrelated families reported. Treatment: CoQ10 supplementation can limit disease progression and reverse some clinical manifestations. |
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| Mendeliome v1.323 | NODAL |
Zornitza Stark edited their review of gene: NODAL: Added comment: NODAL is a good biological candidate for heterotaxy disorders, and this is supported by animal models. The gene is depleted for LoF variants in gnomad. The missense variants reported in PMIDs 9354794 and 19064609 are present at a high population frequency in gnomad, including some in homozygous case: their association with disease is DISPUTED. A total of at least 7 families reported with severe CHD and high impact variants (stop gain, frameshift and canonical splice site). However, almost invariably these were inherited from unaffected or questionably affected parents (e.g. self reports of heart murmur in childhood), raising questions about whether these variants contribute to disease under a monogenic or polygenic model and/or about penetrance. Discussed at GenCC on 13/9/2022 and agreed on MODERATE assessment.; Changed rating: AMBER; Changed publications: 9354794, 19064609, 29368431, 19933292, 11311163, 30293987 |
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| Mendeliome v1.318 | UBAP2L |
Zornitza Stark changed review comment from: Based on Jia et al (2022 - PMID: 35977029) speech, motor delay as well as ID are observed in individuals harboring de novo pLoF variants in UBAP2L. The gene encodes a regulator of the stress granule (SG) assembly. Extensive evidence is provided on the effect of variants as well as the role of UBAP2L and other genes for components and/or regulation of SG in pathogenesis of NDDs. Among others a Ubap2l htz deletion mouse model (behavioral and cognitive impairment, abnormal cortical development due to impaired SG assembly, etc). Data from 26 previous studies, aggregating 40,853 probands with NDDs (mostly DD/ID, also ASD) suggest enrichment for DNMs in UBAP2L or other genes previously known and further shown to be important for SG formation (incl. G3BP1/G3BP2, CAPRIN1). Sources: Literature; to: Based on Jia et al (2022 - PMID: 35977029) speech, motor delay as well as ID are observed in 11 individuals harboring de novo pLoF variants in UBAP2L. The gene encodes a regulator of the stress granule (SG) assembly. Extensive evidence is provided on the effect of variants as well as the role of UBAP2L and other genes for components and/or regulation of SG in pathogenesis of NDDs. Among others a Ubap2l htz deletion mouse model (behavioral and cognitive impairment, abnormal cortical development due to impaired SG assembly, etc). Data from 26 previous studies, aggregating 40,853 probands with NDDs (mostly DD/ID, also ASD) suggest enrichment for DNMs in UBAP2L or other genes previously known and further shown to be important for SG formation (incl. G3BP1/G3BP2, CAPRIN1). Sources: Literature |
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| Mendeliome v1.317 | UBAP2L |
Zornitza Stark gene: UBAP2L was added gene: UBAP2L was added to Mendeliome. Sources: Literature Mode of inheritance for gene: UBAP2L was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: UBAP2L were set to 35977029 Phenotypes for gene: UBAP2L were set to Neurodevelopmental disorder, MONDO:0700092, UBAP2L-related Review for gene: UBAP2L was set to GREEN Added comment: Based on Jia et al (2022 - PMID: 35977029) speech, motor delay as well as ID are observed in individuals harboring de novo pLoF variants in UBAP2L. The gene encodes a regulator of the stress granule (SG) assembly. Extensive evidence is provided on the effect of variants as well as the role of UBAP2L and other genes for components and/or regulation of SG in pathogenesis of NDDs. Among others a Ubap2l htz deletion mouse model (behavioral and cognitive impairment, abnormal cortical development due to impaired SG assembly, etc). Data from 26 previous studies, aggregating 40,853 probands with NDDs (mostly DD/ID, also ASD) suggest enrichment for DNMs in UBAP2L or other genes previously known and further shown to be important for SG formation (incl. G3BP1/G3BP2, CAPRIN1). Sources: Literature |
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| Mendeliome v1.285 | TYMS |
Lucy Spencer gene: TYMS was added gene: TYMS was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TYMS was set to Other Publications for gene: TYMS were set to 35931051 Phenotypes for gene: TYMS were set to Dyskeratosis congenita MONDO:0015780 Review for gene: TYMS was set to RED Added comment: 8 families with dyskeratosis congenita and heterozygous variants in TYMS. 4 PTCs, 2 missense and 1 splice (2 families had the same frameshift). However in all families 1 unaffected parent was also heterozygous for the same TYSM variant. The other parent in 3 of these families was then shown to carry a heterozygous variant in ENOSF1 which each affected child was also heterozygous for. ENOSF1 has been shown to modify TYMS expression at the RNA level by acting as an antisense molecule to TYMS. ENOSF1 partially overlaps TYMS on chromosome 18 and is transcribed in the opposite direction to TYMS. This paper is suggesting digenic inheritance. The TYMS wild type parent from another family was seen to have a TYMSOS variant which was also observed along with the TYMS variant in their 2 affected children. Immunoblotting showed a stark reduction in TYMS protein level in the cells of affected probands when compared to the parent carrier, wild-type parent, and the controls. Lymphoblastoid cells from affected probands have severe TYMS deficiency, altered cellular deoxyribonucleotide triphosphate pools, and hypersensitivity to the TYMS-specific inhibitor 5-fluorouracil. These defects in the nucleotide metabolism pathway resulted in genotoxic stress, defective transcription, and abnormal telomere maintenance. Gene-rescue studies in cells from affected probands revealed that post-transcriptional epistatic silencing of TYMS is occurring via elevated ENOSF1. Sources: Literature |
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| Mendeliome v1.276 | NOTCH1 |
Chern Lim changed review comment from: PMID: 35947102: - Seven unrelated patients with leukoencephalopathy and calcifications, germline heterozygous de novo gain-of-function variants in NOTCH1. - Missense and small inframe insertion variants in the negative regulatory region.; to: PMID: 35947102: - Seven unrelated patients with leukoencephalopathy and calcifications, germline heterozygous de novo gain-of-function variants in NOTCH1. - Other clinical features include intellectual disability, spasticity and etc. Childhood onset in most individuals however 15y and 40y reported in two individuals. - Missense and small inframe insertion variants in the negative regulatory region. |
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| Mendeliome v1.252 | FOCAD |
Zornitza Stark gene: FOCAD was added gene: FOCAD was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: FOCAD was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: FOCAD were set to 35864190 Phenotypes for gene: FOCAD were set to Liver disease, severe congenital, MIM# 619991 Review for gene: FOCAD was set to GREEN Added comment: Moreno Traspas et al 2022 reported 14 children from ten unrelated families with syndromic form of pediatric liver cirrhosis. Genome/exome sequencing analysis reveled biallelic variants in the FOCAD gene. Most of the mutations were nonsense, frameshift, or splice site alterations, predicted to result in a loss of function, but there were also 3 missense variants at highly conserved residues. Western blot analysis of dermal fibroblasts derived from 2 patients showed near absent FOCAD expression in cellular extracts. There were also decreased levels of the SKIC2 protein, suggesting that FOCAD may contribute to the stability of RNA helicase (OMIM: 619991). Sources: Expert Review |
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| Mendeliome v1.173 | PMM2 |
Zornitza Stark edited their review of gene: PMM2: Added comment: Association with HIPKD: Cabezas et al (2017) reported co-occurrence of hyperinsulinaemic hypoglycaemia and polycystic kidney disease (HIPKD in 17 children from 11 unrelated families. Patients presented with hyperinsulinaemic hypoglycaemia in infancy and enlarged kidneys with multiple kidney cysts. Some progressed to ESKD and some had liver cysts. Whole-genome linkage analysis in 5 informative families identified a single significant locus on chromosome 16p13.2. Sequencing of the coding regions of all linked genes failed to identify biallelic mutations. Instead, they found in all patients a promoter mutation (c.-167G>T) in PMM2, either homozygous or in trans with PMM2 coding mutations. They found deglycosylation in cultured pancreatic β cells altered insulin secretion. In vitro, the PMM2 promoter mutation associated with decreased transcriptional activity in patient kidney cells and impaired binding of the transcription factor ZNF143. In silico analysis suggested an important role of ZNF143 for the formation of a chromatin loop including PMM2. They proposed that the PMM2 promoter mutation alters tissue-specific chromatin loop formation, with consequent organ-specific deficiency of PMM2 leading to the restricted phenotype of HIPKD. None of the patients exhibited the typical clinical or diagnostic features of CDG1A. Serum transferrin glycosylation was normal in 11 patients who had assessment.; Changed publications: 28108845, 28373276, 32595772; Changed phenotypes: Congenital disorder of glycosylation, type Ia (MIM#212065), Hyperinsulinaemic Hypoglycaemia and Polycystic Kidney Disease (HIPKD), MONDO:0020642, PMM2-related |
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| Mendeliome v1.119 | TAF8 |
Zornitza Stark changed review comment from: 8 individuals reported from 5 families, four of which were consanguineous. Clinical features included severe psychomotor retardation with almost absent development, feeding problems, microcephaly, growth retardation, spasticity and epilepsy. Six had the c.781-1G > A variant in homozygous state. This is likely to be a founder variant. One family with different compound heterozygous variants. Sources: Literature; to: 8 individuals reported from 5 families, four of which were consanguineous. Clinical features included severe psychomotor retardation with almost absent development, feeding problems, microcephaly, growth retardation, spasticity and epilepsy. Six had the c.781-1G > A variant in homozygous state. Unclear if this is a founder variant, families of different ethnicities. One family with different compound heterozygous variants. Sources: Literature |
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| Mendeliome v1.118 | TAF8 |
Zornitza Stark gene: TAF8 was added gene: TAF8 was added to Mendeliome. Sources: Literature founder tags were added to gene: TAF8. Mode of inheritance for gene: TAF8 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TAF8 were set to 29648665; 35759269 Phenotypes for gene: TAF8 were set to Neurodevelopmental disorder, MONDO:0700092, TAF8-related Review for gene: TAF8 was set to GREEN Added comment: 8 individuals reported from 5 families, four of which were consanguineous. Clinical features included severe psychomotor retardation with almost absent development, feeding problems, microcephaly, growth retardation, spasticity and epilepsy. Six had the c.781-1G > A variant in homozygous state. This is likely to be a founder variant. One family with different compound heterozygous variants. Sources: Literature |
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| Mendeliome v0.13792 | CD164 |
Alison Yeung gene: CD164 was added gene: CD164 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CD164 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CD164 were set to 26197441; 35254497; 26197441 Phenotypes for gene: CD164 were set to Deafness, autosomal dominant 66, MIM# 616969 Review for gene: CD164 was set to GREEN Added comment: p.(Arg192Ter), a truncating variant that results in loss of 6 amino acids, was detected in two families (one Polish and one Korean) with hearing loss. Four affected (heterozygous) and two unaffected (neg) were tested, however 14 members had been diagnosed with HL in a large multi generational family (gene panel 237 genes). The second family (WES) had two affected heterozygous and no unaffected were tested. This same variant had previously been reported in a Danish family (12 affected heterozygous and 13 unaffected negative, but one younger member unaffected are heterozygous) with hearing loss (PMID: 26197441), for which functional studies in HEK cells demonstrated that the truncated protein was almost completely retained on the plasma cell membrane in contrast to the wild-type protein, which targeted primarily to the endo-lysosomal compartments. The YHTL motif, deleted by the c.574C>T nonsense mutation, is a canonical sorting motif known to be recognized by specific adaptor proteins in the cytosol, leading to subcellular trafficking of the transmembrane protein to endosomes and lysosomes. Sources: Literature |
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| Mendeliome v0.13787 | TULP3 |
Anna Ritchie gene: TULP3 was added gene: TULP3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TULP3 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TULP3 were set to PMID: 35397207 Phenotypes for gene: TULP3 were set to progressive degenerative liver fibrosis with variable fibrocystic kidney disease; hypertrophic cardiomyopathy MONDO:0005045 Review for gene: TULP3 was set to GREEN Added comment: 15 individuals from eight unrelated families with bi-allelic variants in TULP3 were detected. The affected individuals reported are mostly adults, in the 3rd through 7th decades of life, and presented with progressive degenerative liver fibrosis with variable fibrocystic kidney disease and hypertrophic cardiomyopathy. The human phenotype was ecapitulated in adult zebrafish and confirmed disruption of critical ciliary cargo composition in several primary cell lines derived from affected individuals Sources: Literature |
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| Mendeliome v0.13653 | COL1A1 |
Ain Roesley changed review comment from: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667) The mild forms are usually caused by haploinsufficiency and result in a reduced amount of normal type I collagen, the severe and lethal forms result from dominant negative variants which produce structural defects in the collagen molecule (PMID:12362985).; to: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667) For skeletal phenotypes: The mild forms are usually caused by haploinsufficiency and result in a reduced amount of normal type I collagen, the severe and lethal forms result from dominant negative variants which produce structural defects in the collagen molecule (PMID:12362985). |
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| Mendeliome v0.13653 | COL1A1 |
Ain Roesley changed review comment from: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667); to: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667) The mild forms are usually caused by haploinsufficiency and result in a reduced amount of normal type I collagen, the severe and lethal forms result from dominant negative variants which produce structural defects in the collagen molecule (PMID:12362985). |
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| Mendeliome v0.13297 | PDGFRA |
Krithika Murali changed review comment from: ?Suitability for Incidentalome versus Mendeliome based on adult age of diagnosis in reported cases. --- Six unrelated families reported with heterozygous germline variants associated with familial GIST and/or inflammatory fibroid polyps - IFP (benign lesions caused by excessive tissue proliferation and inflammatory cell infiltration into the lumen of the GI tract). Note that reported individuals diagnosed as adults. One individual reported with diagnosis of gastric mass/polyps age 22 (in 1977) raising the possibility of pre-symptomatic disease onset in adolescence. Green PanelApp England in the following panels: tumour predisposition - childhood onset; inherited predisposition to GIST; sarcoma cancer susceptibility. --- PMID 34107389 Hodan et al 2021 - report a 35 yo F with jejunal IFP and a heterozygous germline missense PDGFRA variant (c.1664A>G p.Y555C) . The variant segregated with 3 relatives with confirmed IFPs. Two obligate carriers were reported to have had a similar phenotype while at least one obligate male carrier had no reported history of IFPs. This variant was also reported in an unrelated family with multiple IFPs in 2006. PMID 29486293 Manley et al 2018 - proband is a 50 yo M with multiple ileal intusussceptions and IFPs and GIST. Heterozygous D846V germline variant identified. Variant identified in daughter and 2 siblings. Coarser face, coarser skin, broader hands and feet, unexplained premature loss of teeth requiring dentures in their 40s described in relatives with the variant, no polyps or tumour identified in screened family members. Pdgfra +/K mutant mice recapitulated the human phenotype. Mice with the constitutively activated mutant PDGFRA shown to have diffuse expansion of the gastrointestinal submucosa, which exhibits an increased number of spindled fibroblast-like cells and marked collagen deposition. Mutant mice also develop intestinal polyps morphologically similar to IFPs. The Pdgfra +/K mice also exhibit thickened skin due to excess collagen deposition within the dermis and subcutaneous tissues. PMID 25975287 Ricci et al 2015 - report a family with het germline P653L PDGFRA missense variant. The proband was a 67 yo M with multiple intra-abdominal GIST and gastric/colonic inflammatory fibroid polyps. Multiple adult relatives (youngest age 31) were diagnosed with IFPs/fibrous tumours with the variant segregating with disease. PMID: 18670346 Carney et al 2008 and PMID: 17566086 Pasini et al 2007 - heterozygous germline PDGFRA mutation (V561D) in an individual with GIST and multiple polyps, diagnosed initially aged 22 with multiple GIST/polyps. No other relatives available for genotyping and no other significant family history reported. PMID: 17087943 de Raedt et al 2006 - heterozygous PDGFRA(Y555C) variant reported in a family with multiple relatives affected by IFP, including one death from secondary bowel obstruction age 35. PMID: 14699510 Chompret et al 2004 - Heterozygous c.2675G>T D846Y germline variant detected in a French family with 5 relatives developing adult-onset GIST, variant segregated with disease. -- Gain of function somatic variants associated with sporadic GIST. Somatic chromosomal rearrangements resulting in PDGFRA and FIP1L1 gene fusion associated with idiopathic hypereosinophilic syndrome.; to: Six unrelated families reported with heterozygous germline variants associated with familial GIST and/or inflammatory fibroid polyps - IFP (benign lesions caused by excessive tissue proliferation and inflammatory cell infiltration into the lumen of the GI tract). Note that reported individuals diagnosed as adults. One individual reported with diagnosis of gastric mass/polyps age 22 (in 1977) raising the possibility of pre-symptomatic disease onset in adolescence. Green PanelApp England in the following panels: tumour predisposition - childhood onset; inherited predisposition to GIST; sarcoma cancer susceptibility. --- PMID 34107389 Hodan et al 2021 - report a 35 yo F with jejunal IFP and a heterozygous germline missense PDGFRA variant (c.1664A>G p.Y555C) . The variant segregated with 3 relatives with confirmed IFPs. Two obligate carriers were reported to have had a similar phenotype while at least one obligate male carrier had no reported history of IFPs. This variant was also reported in an unrelated family with multiple IFPs in 2006. PMID 29486293 Manley et al 2018 - proband is a 50 yo M with multiple ileal intusussceptions and IFPs and GIST. Heterozygous D846V germline variant identified. Variant identified in daughter and 2 siblings. Coarser face, coarser skin, broader hands and feet, unexplained premature loss of teeth requiring dentures in their 40s described in relatives with the variant, no polyps or tumour identified in screened family members. Pdgfra +/K mutant mice recapitulated the human phenotype. Mice with the constitutively activated mutant PDGFRA shown to have diffuse expansion of the gastrointestinal submucosa, which exhibits an increased number of spindled fibroblast-like cells and marked collagen deposition. Mutant mice also develop intestinal polyps morphologically similar to IFPs. The Pdgfra +/K mice also exhibit thickened skin due to excess collagen deposition within the dermis and subcutaneous tissues. PMID 25975287 Ricci et al 2015 - report a family with het germline P653L PDGFRA missense variant. The proband was a 67 yo M with multiple intra-abdominal GIST and gastric/colonic inflammatory fibroid polyps. Multiple adult relatives (youngest age 31) were diagnosed with IFPs/fibrous tumours with the variant segregating with disease. PMID: 18670346 Carney et al 2008 and PMID: 17566086 Pasini et al 2007 - heterozygous germline PDGFRA mutation (V561D) in an individual with GIST and multiple polyps, diagnosed initially aged 22 with multiple GIST/polyps. No other relatives available for genotyping and no other significant family history reported. PMID: 17087943 de Raedt et al 2006 - heterozygous PDGFRA(Y555C) variant reported in a family with multiple relatives affected by IFP, including one death from secondary bowel obstruction age 35. PMID: 14699510 Chompret et al 2004 - Heterozygous c.2675G>T D846Y germline variant detected in a French family with 5 relatives developing adult-onset GIST, variant segregated with disease. -- Gain of function somatic variants associated with sporadic GIST. Somatic chromosomal rearrangements resulting in PDGFRA and FIP1L1 gene fusion associated with idiopathic hypereosinophilic syndrome. |
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| Mendeliome v0.13289 | HSPG2 |
Zornitza Stark changed review comment from: Allelic disorders with some phenotypic overlap. Schwartz-Jampel syndrome (SJS) is a rare autosomal recessive condition defined by the association of myotonia with chondrodysplasia; blepharophimosis is a key feature. More than 20 families reported. Silverman-Handmaker dyssegmental dysplasia (DDSH) is a lethal autosomal recessive skeletal dysplasia with anisospondyly and micromelia. Individuals with DDSH also have a flat face, micrognathia, cleft palate and reduced joint mobility, and frequently have an encephalocele. The endochondral growth plate is short, the calcospherites (spherical calcium-phosphorus crystals produced by hypertrophic chondrocytes) are unfused, and there is mucoid degeneration of the resting cartilage. Two families reported.; to: Allelic disorders with some phenotypic overlap. Schwartz-Jampel syndrome (SJS) is a rare autosomal recessive condition defined by the association of myotonia with chondrodysplasia; blepharophimosis is a key feature. More than 20 families reported. Silverman-Handmaker dyssegmental dysplasia (DDSH) is a lethal autosomal recessive skeletal dysplasia with anisospondyly and micromelia. Individuals with DDSH also have a flat face, micrognathia, cleft palate and reduced joint mobility, and frequently have an encephalocele. The endochondral growth plate is short, the calcospherites (spherical calcium-phosphorus crystals produced by hypertrophic chondrocytes) are unfused, and there is mucoid degeneration of the resting cartilage. Two families reported. Appears associated with null variants. |
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| Mendeliome v0.12910 | F12 | Bryony Thompson commented on gene: F12: Also associated with FXII deficiency - PMID: 29383625, 20022356, 18024408, 20386432, 26709783, 21264442, 28007010, 15205584, 30700128 - Biallalelic loss-of-function variants are a well-established cause of FXII deficiency. FXII deficiency is not associated with bleeding risk unlike other coagulation factors, it is either asymptomatic or characterized by a prolonged activated partial thromboplastin time. DEFINITIVE gene-disease validity classification by the ClinGen Hemostasis Thrombosis VCEP, Classification - 01/22/2020 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12859 | SGCD |
Samantha Ayres edited their review of gene: SGCD: Added comment: Variants identified in multiple cases of cardiomyopathy, however most are too common in the general population to explain the disease. First described in the literature with potential association to cardiomyopathy in 2000 (Tsubata et al 10974018). Case-control study by Mazzarotto et al 2020, did not identify enrichment of SGCD in DCM cohort. Animal models demonstrate mild cardiomyopathy phenotype. Curated as 'limited' gene-disease association by ClinGen; Changed rating: RED; Changed publications: 10974018, 31983221, 23695275; Changed phenotypes: Cardiomyopathy, dilated, 1L, MIM#606685, dilated cardiomyopathy MONDO:0005021; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted |
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| Mendeliome v0.12759 | TTC19 |
Zornitza Stark edited their review of gene: TTC19: Added comment: Mitochondrial complex III deficiency nuclear type 2 is an autosomal recessive severe neurodegenerative disorder that usually presents in childhood, but may show later onset, even in adulthood. Affected individuals have motor disability, with ataxia, apraxia, dystonia, and dysarthria, associated with necrotic lesions throughout the brain. Most patients also have cognitive impairment and axonal neuropathy and become severely disabled later in life. The disorder may present clinically as spinocerebellar ataxia or Leigh syndrome, or with psychiatric disturbances. At least 4 unrelated families reported.; Changed publications: 21278747, 23532514, 24368687, 24397319 |
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| Mendeliome v0.12610 | SPG7 |
Zornitza Stark changed review comment from: SPG7 mutations most often lead to spastic paraparesis (HSP) and/or hereditary cerebellar ataxia (HCA), frequently with mixed phenotypes. Well established for bi-allelic variants. Enrichment of mono-allelic variants reported in a couple of cohorts, although a recent one suggests digenic inheritance.; to: SPG7 mutations most often lead to spastic paraparesis (HSP) and/or hereditary cerebellar ataxia (HCA), frequently with mixed phenotypes. Well established for bi-allelic variants. Enrichment of mono-allelic variants reported in a couple of cohorts, although a recent one suggests digenic inheritance. Association with OA: 7 families reported for AD OA, including 5 missense and 2 frameshift variants, PMID 32548275 |
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| Mendeliome v0.12519 | TSPAN7 |
Zornitza Stark changed review comment from: The P172H missense, which is reported in two families, is present at a high frequency in gnomad, including 66 hemizygotes.; to: The P172H missense, which is reported in two families, is present at a high frequency in gnomad, including 66 hemizygotes. Most variants in ClinVar are either VOUS or LB. |
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| Mendeliome v0.12498 | TMEM98 | Zornitza Stark Phenotypes for gene: TMEM98 were changed from to Nanophthalmos 4 MIM#615972 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12495 | TMEM98 | Zornitza Stark reviewed gene: TMEM98: Rating: GREEN; Mode of pathogenicity: None; Publications: 24852644, 26392740; Phenotypes: Nanophthalmos 4 MIM#615972; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12304 | CA12 |
Ain Roesley changed review comment from: Glu143Lys found in 4 Israeli Bedouin families 2 other unrelated families reported with 1 missense (LoF demosntrated), 1 splice (aberrant splicing proven) and 1 fs (protein truncating, not NMD); to: Glu143Lys found in 4 Israeli Bedouin families 2 other unrelated families reported with 1 missense (LoF demonstrated), 1 splice (aberrant splicing proven) and 1 fs (protein truncating, not NMD) |
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| Mendeliome v0.11680 | USH2A |
Belinda Chong edited their review of gene: USH2A: Added comment: Well established gene-disease association - Usher syndrome, DEFINITIVE by ClinGen. PMID 20507924: Screened the long isoform of USH2A in 80 patients with nonsyndromic autosomal recessive RP and identified at least 1 deleterious mutation in 19% of cases. The authors stated that their findings supported USH2A as the most common known cause of RP in the United States. https://www.ncbi.nlm.nih.gov/books/NBK1341/, PMID 17296898, ClinVar Reports of cosegregation of Usher Syndrome and Retinitis Pigmentosa; Changed rating: GREEN; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal |
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| Mendeliome v0.11674 | C4A |
Ain Roesley changed review comment from: Associated with increased risk for systemic lupus erythematosus (SLE). This is mostly involving haplotypes, gene copy number, gene conversions with/without C4B; to: Associated with increased risk for systemic lupus erythematosus (SLE). This is mostly involving haplotypes, gene copy number, gene conversions with/without C4B There are no LP/P SNV in clinvar PMID: 32048120; 2019 Update of the IUIS Phenotypical Classification indicates that complete C4 deficiency requires both C4A+C4B and C4A alone leads to partial deficiency |
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| Mendeliome v0.11668 | C4B |
Ain Roesley changed review comment from: Associated with increased risk for systemic lupus erythematosus (SLE). This is mostly involving haplotypes, gene copy number, gene conversions with/without C4A; to: Associated with increased risk for systemic lupus erythematosus (SLE). This is mostly involving haplotypes, gene copy number, gene conversions with/without C4A no LP/P SNVs in clinvar. (1 LP but evidence provided indicates that it was classified as a VUS) PMID: 32048120; 2019 Update of the IUIS Phenotypical Classification indicates that complete C4 deficiency requires both C4A+C4B and C4A alone leads to partial deficiency |
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| Mendeliome v0.11540 | NDUFAF4 |
Krithika Murali edited their review of gene: NDUFAF4: Added comment: 3 unrelated families reported with patient-specific functional evidence provided for each. PMID: 32949790 - report two siblings with facial dysmorphism and lactic acidosis diagnosed neonatally with subsequent fatal early encephalopathy with apneic episodes, irritability, central hypoventilation, liver involvement and hyperammonemia. Cerebral white matter anomalies reported in one patient and cardiomyopathy in the other. WES identified homozygous nonsense NDUFAF4 variants with absent NDUFAF4 expression in patient fibroblasts. OXPHOS assembly studies demonstrated almost undetectable levels of fully assembled complex I and complex I–containing supercomplexes and an abnormal accumulation of SCIII2IV1 supercomplexes. Morphologically, fibroblasts showed rounder mitochondria and a diminished degree of branching of the mitochondrial network. PMID: 28853723 - report one patient born at 38 weeks after IOL for IUGR. Presented age 7 months with developmental regression, growth failure and central hypotonia. Brain MRI revealed diffuse bilateral signal alterations in the basal ganglia and thalami and an EEG showed generalized slowing with multifocal spikes consistent with an epileptogenic focus. Homozygous missense NDUFAF4 variants identified. Lentiviral complementation of patient fibroblasts with wild-type NDUFAF4 rescued complex I deficiency and assembly defect PMID 18179882 - report multiple affected individuals from one family. Most presented soon after birth with severe metabolic acidosis and high plasma lactate levels. Patients who survived longer were repeatedly admitted because of exacerbation of the acidosis during intercurrent infections. One long-term survivor had profound ID.; Changed publications: 32949790, 28853723, 18179882 |
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| Mendeliome v0.11295 | KIAA1109 |
Zornitza Stark changed review comment from: ALKKUCS is an autosomal recessive severe neurodevelopmental disorder characterized by arthrogryposis, brain abnormalities associated with cerebral parenchymal underdevelopment, and global developmental delay. Most affected individuals die in utero or soon after birth. Additional abnormalities may include hypotonia, dysmorphic facial features, and involvement of other organ systems, such as cardiac or renal. The few patients who survive have variable intellectual disability and may have seizures.; to: ALKKUCS is an autosomal recessive severe neurodevelopmental disorder characterized by arthrogryposis, brain abnormalities associated with cerebral parenchymal underdevelopment, and global developmental delay. Most affected individuals die in utero or soon after birth. Additional abnormalities may include hypotonia, dysmorphic facial features, and involvement of other organ systems, such as cardiac or renal. The few patients who survive have variable intellectual disability and may have seizures. More than 10 families reported. |
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| Mendeliome v0.11109 | HIST1H4E |
Paul De Fazio changed review comment from: 17 patients identified with de novo missense variants affecting Lys31, Pro32, Arg35, Leu37, Arg40 (recurrent), Arg45 (recurrent), Tyr98 (recurrent). All individuals had ID/dev delay. Additional phenotypes in some but not all individuals included epilepsy, hypotonia, facial dysmorphism. Most had reduced birth length, OFC, weight (-1 to -3SD). A zebrafish model has developmental defects. Sources: Literature; to: HGNC recognised gene: H4C5 17 patients identified with de novo missense variants affecting Lys31, Pro32, Arg35, Leu37, Arg40 (recurrent), Arg45 (recurrent), Tyr98 (recurrent). All individuals had ID/dev delay. Additional phenotypes in some but not all individuals included epilepsy, hypotonia, facial dysmorphism. Most had reduced birth length, OFC, weight (-1 to -3SD). A zebrafish model has developmental defects. Sources: Literature |
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| Mendeliome v0.11107 | HIST1H4C |
Paul De Fazio changed review comment from: 6 additional individuals with ID and dev delay. All variants were de novo. Lys92 (Lys91 in H4 nomenclature) and Pro33 (Pro32) were the only variants identified. Additional phenotypes in some but not all patients included hypotonia, facial dysmorphisms, conductive hearing loss. Most had reduced birth length, OFC, weight (-1 to -2.5SD). A zebrafish model has developmental defects.; to: HGNC recognised gene: H4C3 6 additional individuals with ID and dev delay. All variants were de novo. Lys92 (Lys91 in H4 nomenclature) and Pro33 (Pro32) were the only variants identified. Additional phenotypes in some but not all patients included hypotonia, facial dysmorphisms, conductive hearing loss. Most had reduced birth length, OFC, weight (-1 to -2.5SD). A zebrafish model has developmental defects. |
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| Mendeliome v0.11103 | HIST1H4E |
Paul De Fazio gene: HIST1H4E was added gene: HIST1H4E was added to Mendeliome. Sources: Literature Mode of inheritance for gene: HIST1H4E was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: HIST1H4E were set to 35202563 Phenotypes for gene: HIST1H4E were set to Neurodevelopmental disorder, HIST1H4E-related MONDO:0700092 Review for gene: HIST1H4E was set to GREEN gene: HIST1H4E was marked as current diagnostic Added comment: 17 patients identified with de novo missense variants affecting Lys31, Pro32, Arg35, Leu37, Arg40 (recurrent), Arg45 (recurrent), Tyr98 (recurrent). All individuals had ID/dev delay. Additional phenotypes in some but not all individuals included epilepsy, hypotonia, facial dysmorphism. Most had reduced birth length, OFC, weight (-1 to -3SD). A zebrafish model has developmental defects. Sources: Literature |
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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 v0.10844 | BAP1 |
Anna Ritchie changed review comment from: 11 de novo germline heterozygous missense BAP1 variants associated with a rare syndromic neurodevelopmental disorder. Functional analysis showed that most of the variants cannot rescue the consequences of BAP1 inactivation, suggesting a loss-of-function mechanism. All affected individuals harboring a de novo BAP1 variant had DD or ID (11/11) characterized notably by speech (11/ 11) and motor delay (6/11). Most of them had hypotonia (7/11), seizures (6/11), and abnormal behavior (8/10), including autism spectrum disorder, attention deficit hyperactivity disorder, and hypersensitivity. Almost all individuals showed dysmorphic facial features (10/11), and more than half (6/11) had skeletal mal- formations (involving the hands [4/11], feet [3/11], or spine [2/11],). Most of the individuals had growth failure (9/11), including four individuals with a very short stature. Sources: Literature; to: 11 de novo germline heterozygous missense BAP1 variants associated with a rare syndromic neurodevelopmental disorder. Functional analysis showed that most of the variants cannot rescue the consequences of BAP1 inactivation, suggesting a loss-of-function mechanism. All affected individuals harboring a de novo BAP1 variant had DD or ID (11/11) characterized notably by speech (11/ 11) and motor delay (6/11). Most of them had hypotonia (7/11), seizures (6/11), and abnormal behavior (8/10), including autism spectrum disorder, attention deficit hyperactivity disorder, and hypersensitivity. Almost all individuals showed dysmorphic facial features (10/11), and more than half (6/11) had skeletal malformations (involving the hands [4/11], feet [3/11], or spine [2/11]). Most of the individuals had growth failure (9/11), including four individuals with a very short stature. Sources: Literature |
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| Mendeliome v0.10844 | BAP1 |
Anna Ritchie changed review comment from: 11 de novo germline heterozygous missense BAP1 variants associated with a rare syndromic neurodevelopmental disorder. Functional analysis showed that most of the variants cannot rescue the consequences of BAP1 inactivation, suggesting a loss-of-function mechanism. Patients phenotypes also included developmental delay, speech and motor delay, seizures, hypotonia, abnormal behaviour, autism, attention deficit hyperactivity disorder, and hypersensitivity. Sources: Literature; to: 11 de novo germline heterozygous missense BAP1 variants associated with a rare syndromic neurodevelopmental disorder. Functional analysis showed that most of the variants cannot rescue the consequences of BAP1 inactivation, suggesting a loss-of-function mechanism. All affected individuals harboring a de novo BAP1 variant had DD or ID (11/11) characterized notably by speech (11/ 11) and motor delay (6/11). Most of them had hypotonia (7/11), seizures (6/11), and abnormal behavior (8/10), including autism spectrum disorder, attention deficit hyperactivity disorder, and hypersensitivity. Almost all individuals showed dysmorphic facial features (10/11), and more than half (6/11) had skeletal mal- formations (involving the hands [4/11], feet [3/11], or spine [2/11],). Most of the individuals had growth failure (9/11), including four individuals with a very short stature. Sources: Literature |
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| Mendeliome v0.10838 | BAP1 |
Anna Ritchie gene: BAP1 was added gene: BAP1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: BAP1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: BAP1 were set to PMID: 35051358 Phenotypes for gene: BAP1 were set to syndromic intellectual disability MONDO:0000508 Penetrance for gene: BAP1 were set to unknown Review for gene: BAP1 was set to GREEN Added comment: 11 de novo germline heterozygous missense BAP1 variants associated with a rare syndromic neurodevelopmental disorder. Functional analysis showed that most of the variants cannot rescue the consequences of BAP1 inactivation, suggesting a loss-of-function mechanism. Patients phenotypes also included developmental delay, speech and motor delay, seizures, hypotonia, abnormal behaviour, autism, attention deficit hyperactivity disorder, and hypersensitivity. Sources: Literature |
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| Mendeliome v0.10633 | DLX5 |
Zornitza Stark changed review comment from: A homozygous missense mutation (Q178P) was identified in 2 affected sisters from a consanguineous Yemeni family with split-hand/foot malformation and hearing loss, who had no detectable chromosomal aberration, Shamseldin et al. (2012). A heterozygosity missense mutation (Q186H) was identified in a 31-year-old Chinese woman with SHFM, Wang et al. (2014). A heterozygosity nonsense mutationIn (E39X) was identified in the probands from 2 unrelated Polish families with isolated SHFM, Sowinska-Seidler et al. (2014). Animal model evidence - mouse; to: A homozygous missense mutation (Q178P) was identified in 2 affected sisters from a consanguineous Yemeni family with split-hand/foot malformation and hearing loss, who had no detectable chromosomal aberration, Shamseldin et al. (2012). A heterozygosity missense mutation (Q186H) was identified in a 31-year-old Chinese woman with SHFM, Wang et al. (2014). A heterozygosity nonsense mutationIn (E39X) was identified in the probands from 2 unrelated Polish families with isolated SHFM, Sowinska-Seidler et al. (2014). Animal model evidence - mouse Green for mono-allelic, Amber for bi-allelic. |
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| Mendeliome v0.10556 | NAA10 |
Ain Roesley edited their review of gene: NAA10: Added comment: For Ogden association: lethal X-linked. 9 males from 3 families with recurrent Ser37Pro All presenting the distinctive and recognizable phenotype, which includes mostly postnatal growth retardation, global severe developmental delay, characteristic craniofacial features, and structural cardiac anomalies and/or arrhythmias For non-lethal syndromic ID: reported in 10 males and (mostly de novo) in 37 females variants causing this are missense located along the protein and 1 truncating For syndromic microopththamia: variants are in the UTR; Changed mode of inheritance: Other |
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| Mendeliome v0.10550 | PAK2 |
Arina Puzriakova gene: PAK2 was added gene: PAK2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PAK2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PAK2 were set to 33693784 Phenotypes for gene: PAK2 were set to Knobloch 2 syndrome Review for gene: PAK2 was set to RED Added comment: Antonarakis et al., 2021 (PMID: 33693784) reported two affected siblings from a non-consanguineous New Zealand family. Both had retinal detachment and interstitial parenchymal pulmonary changes on chest X-rays, but only one child had additional significant features such as cataract, posterior encephalocele, severe DD/ID with ASD, and epilepsy. WES revealed a heterozygous PAK2 variant (c.1303 G>A, p.Glu435Lys) in both individuals that apparently occurred de novo indicating parental germ-line mosaicism; however, mosaicism could not be detected by deep sequencing of blood parental DNA. Functional studies showed that the variant, located in the kinase domain, results in a partial loss of the kinase activity. Sources: Literature |
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| Mendeliome v0.10433 | SKI |
Seb Lunke changed review comment from: Well established gene disease association with craniosynostosis, skeletal, and cardiovascular anomalies, high-arched palate, micrognathia. Inguinal or umbilical hernia also described. Most common skeletal manifestations are arachnodactyly, pectus deformity, camptodactyly, scoliosis. LoF not fully established on only missense described so far. Some functional work suggest potential GoF for TGF beta signalling, but not conclusive. Not enough evidence so far to go against LoF.; to: Well established gene disease association with craniosynostosis, skeletal, and cardiovascular anomalies, high-arched palate, micrognathia. Inguinal or umbilical hernia also described. Most common skeletal manifestations are arachnodactyly, pectus deformity, camptodactyly, scoliosis. LoF not fully established as only missense described so far. Some functional work suggest potential GoF for TGF beta signalling, but not conclusive. Not enough evidence so far to go against LoF. |
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| Mendeliome v0.10433 | SKI |
Seb Lunke commented on gene: SKI: Well established gene disease association with craniosynostosis, skeletal, and cardiovascular anomalies, high-arched palate, micrognathia. Inguinal or umbilical hernia also described. Most common skeletal manifestations are arachnodactyly, pectus deformity, camptodactyly, scoliosis. LoF not fully established on only missense described so far. Some functional work suggest potential GoF for TGF beta signalling, but not conclusive. Not enough evidence so far to go against LoF. |
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| Mendeliome v0.10415 | SETBP1 |
Zornitza Stark changed review comment from: GoF variants cause Schinzel-Giedion syndrome, whereas LoF variants cause SETBP1-haploinsufficiency syndrome, over 40 individuals reviewed in PMID 34807554.; to: GoF variants cause Schinzel-Giedion syndrome, a severe multi-system disorder characterized by recognizable facial characteristics, severe-profound intellectual disability, intractable epilepsy, cortical visual impairment, deafness, and congenital anomalies such as cardiac defects, urogenital defects, and bone abnormalities. Causative pathogenic variants are clustered within a 12-base pair hot spot region in exon 4. LoF variants cause SETBP1-haploinsufficiency syndrome, characterized by hypotonia and mild motor developmental delay; intellectual abilities ranging from normal to severe disability; speech and language disorder; behavioral problems (most commonly attention/concentration deficits and hyperactivity, impulsivity), and refractive errors and strabismus. Over 40 individuals reviewed in PMID 34807554. |
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| Mendeliome v0.10308 | AGA | Zornitza Stark changed review comment from: Aspartylglucosaminuria (AGU) is a severe autosomal recessive lysosomal storage disorder that involves the central nervous system and causes skeletal abnormalities as well as connective tissue lesions. The most characteristic feature is progressive mental retardation. Multiple families and mouse model.; to: Aspartylglucosaminuria (AGU) is a severe autosomal recessive lysosomal storage disorder that involves the central nervous system and causes skeletal abnormalities as well as connective tissue lesions. The most characteristic feature is progressive ID. Multiple families and mouse model. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10253 | REL | Zornitza Stark Phenotypes for gene: REL were changed from Combined immunodeficiency; T cells: normal, decreased memory CD4, poor proliferation; B cells: low, mostly naive, few switched memory B cells, impaired proliferation; Recurrent infections with bacteria, mycobacteria, salmonella and opportunistic organisms; Defective innate immunity to Immunodeficiency 92, MIM# 619652; Combined immunodeficiency; T cells: normal, decreased memory CD4, poor proliferation; B cells: low, mostly naive, few switched memory B cells, impaired proliferation; Recurrent infections with bacteria, mycobacteria, salmonella and opportunistic organisms; Defective innate immunity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10250 | REL |
Zornitza Stark edited their review of gene: REL: Added comment: Second unrelated individual reported, homozygous splice site variant. Immunodeficiency-92 (IMD92) is an autosomal recessive primary immunodeficiency characterized by the onset of recurrent infections in infancy or early childhood. Infectious agents are broad, including bacterial, viral, fungal, and parasitic, including Cryptosporidium and Mycobacteria. Patient lymphocytes show defects in both T- and B-cell proliferation, cytokine secretion, and overall function, and there is also evidence of dysfunction of NK, certain antigen-presenting cells, and myeloid subsets.; Changed rating: AMBER; Changed publications: 31103457, 34623332; Changed phenotypes: Immunodeficiency 92, MIM# 619652, Combined immunodeficiency, T cells: normal, decreased memory CD4, poor proliferation, B cells: low, mostly naive, few switched memory B cells, impaired proliferation, Recurrent infections with bacteria, mycobacteria, salmonella and opportunistic organisms, Defective innate immunity |
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| Mendeliome v0.10219 | FREM2 | Zornitza Stark Phenotypes for gene: FREM2 were changed from to Cryptophthalmos, unilateral or bilateral, isolated MIM#123570; Fraser syndrome 2 MIM#617666 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10206 | FREM2 | Ain Roesley reviewed gene: FREM2: Rating: GREEN; Mode of pathogenicity: None; Publications: 15838507, 18203166, 29688405, 33082983; Phenotypes: Cryptophthalmos, unilateral or bilateral, isolated MIM#123570, Fraser syndrome 2 MIM#617666; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10194 | CHRNA3 |
Zornitza Stark changed review comment from: Five individuals from three unrelated families.; to: Five individuals from three unrelated families. Onset is in utero or early childhood. Affected individuals have impaired neuronal bladder and ureteral innervation causing coordination defects that result in secondary structural defects of the renal system, including hydronephrosis, vesicoureteral reflux (VUR), and small kidneys, that may result in chronic kidney disease as well as recurrent urinary tract infections (UTIs). Surgical treatment of VUR is not effective. Most individuals also have additional autonomic features, most commonly impaired pupillary reflex and sometimes orthostatic hypotension. |
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| Mendeliome v0.10181 | ADCY5 |
Zornitza Stark edited their review of gene: ADCY5: Added comment: Neurodevelopmental disorder with hyperkinetic movements and dyskinesia (NEDHYD) is an autosomal recessive complex neurologic disorder characterized by severe global developmental delay with axial hypotonia, impaired intellectual development, poor overall growth, and abnormal involuntary hyperkinetic movements, including dystonia, myoclonus, spasticity, and orofacial dyskinesia. It is the most severe manifestation of ADCY5-related dyskinetic disorders. Five individuals from 2 families reported. Autosomal recessive hyperkinetic movement disorder with dyskinesia, myoclonus, chorea, and dystonia-2 (HYDMCD2) is characterized by the onset of abnormal involuntary movements, mainly affecting the limbs and causing walking difficulties, in the first decade. The severity is variable; some patients have orofacial dyskinesia, resulting in speech difficulties, or develop neuropsychiatric features, including anxiety and social withdrawal. Cardiomyopathy has rarely been described and may be a manifestation of the disorder. Eight individuals from 2 families reported.; Changed publications: 22782511, 24700542, 33051786, 32647899, 33704598, 34631954, 28971144, 30975617; Changed phenotypes: Dyskinesia, familial, with facial myokymia, MIM# 606703, MONDO:0011707, Hyperkinetic movement disorder with dyskinesia, myoclonus, chorea, and dystonia-2 (HYDMCD2), MIM#619647, Neurodevelopmental disorder with hyperkinetic movements and dyskinesia (NEDHYD), MIM#619651; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal |
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| Mendeliome v0.10096 | MSH4 |
Bryony Thompson gene: MSH4 was added gene: MSH4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MSH4 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MSH4 were set to 34794894; 10809667; 12478991; 28541421; 32741963; 33437391; 34755185; 33448284 Phenotypes for gene: MSH4 were set to Primary ovarian insufficiency; azoospermia Review for gene: MSH4 was set to GREEN Added comment: PMID: 34755185 - 2 siblings, 1 with non-obstructive azoospermia and 1 with POI, both homozygous for a stopgain variant. 1 male with non-obstructive azoospermia and biallelic variants. PMID: 33448284 - 2 sisters with POI and 3 brothers with azoospermia in a consanguineous family with a homozygous missense variant (p.Ser754Leu) PMID: 33437391 - 1 case with non-obstructive azoospermia with a homozygous stopgain variant PMID: 32741963 - 2 unrelated cases with spermatogenic arrest with homozygous missense variants (p.Pro638Leu; p. Ser754Leu) PMID: 28541421 - 2 sisters with POI and homozygous for a splice site variant PMID: 10809667 - Msh4-/- male mice are infertile and Msh4-/- female mice lacked most oocytes in the ovaries. Sources: Literature |
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| Mendeliome v0.10068 | TMEM260 | Zornitza Stark changed review comment from: Seven unrelated families reported.; to: Seven unrelated families reported. Clinical features: ventricular septal defects (12/12), mostly secondary to truncus arteriosus (10/12), elevated creatinine levels (6/12), horse-shoe kidneys (1/12) and renal cysts (1/12) in patients. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10013 | ARPC4 |
Bryony Thompson gene: ARPC4 was added gene: ARPC4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ARPC4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: ARPC4 were set to DOI:https://doi.org/10.1016/j.xhgg.2021.100072 Phenotypes for gene: ARPC4 were set to Microcephaly; mild motor delays; significant speech impairment Review for gene: ARPC4 was set to GREEN Added comment: 7 affected individuals from 6 families (gonadal mosaicism was confirmed in the mother of the 2 affected siblings) with a recurrent missense variant (NM_005718.4:c.472C>T; p.R158C). The variant was associated with a decreased amount of F-actin in cells from two affected individuals. Sources: Literature |
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| Mendeliome v0.9979 | DHCR24 | Zornitza Stark Phenotypes for gene: DHCR24 were changed from to Desmosterolosis MIM#602398; Disorders of the metabolism of sterols | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9976 | DHCR24 | Zornitza Stark reviewed gene: DHCR24: Rating: GREEN; Mode of pathogenicity: None; Publications: 33524375, 21671375, 12457401, 29175559, 21559050, 29175559; Phenotypes: Desmosterolosis, MIM# 602398; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9965 | GRIP1 |
Zornitza Stark changed review comment from: Typical features include cryptophthalmos, syndactyly, and abnormalities of the respiratory and urogenital tract. At least 5 families reported.; to: Typical features include cryptophthalmos, syndactyly, and abnormalities of the respiratory and urogenital tract. At least 5 families reported. 'Mild' bi-allelic variants also postulated to cause isolated CAKUT, PMID 24700879. |
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| 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. |
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| Mendeliome v0.9631 | ASXL1 |
Zornitza Stark changed review comment from: Bohring-Opitz syndrome is a malformation syndrome characterized by severe intrauterine growth retardation, poor feeding, profound ID, trigonocephaly, prominent metopic suture, exophthalmos, nevus flammeus of the face, upslanting palpebral fissures, hirsutism, and flexion of the elbows and wrists with deviation of the wrists and metacarpophalangeal joints -- many of these features would be identifiable antenatally.; to: Bohring-Opitz syndrome is a malformation syndrome characterized by severe intrauterine growth retardation, poor feeding, profound ID, trigonocephaly, prominent metopic suture, exophthalmos, nevus flammeus of the face, upslanting palpebral fissures, hirsutism, and flexion of the elbows and wrists with deviation of the wrists and metacarpophalangeal joints. Multiple individuals reported. |
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| Mendeliome v0.9604 | GNAQ | Zornitza Stark Phenotypes for gene: GNAQ were changed from to Sturge-Weber syndrome, somatic, mosaic 185300; Capillary malformations, congenital, 1, somatic, mosaic 163000; Phacomatosis pigmentovascularis | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9600 | GNAQ | Zornitza Stark reviewed gene: GNAQ: Rating: GREEN; Mode of pathogenicity: Other; Publications: 30920161; Phenotypes: Sturge-Weber syndrome, somatic, mosaic 185300, Capillary malformations, congenital, 1, somatic, mosaic 163000, Phacomatosis pigmentovascularis; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9590 | GNB2 | Eleanor Williams reviewed gene: GNB2: Rating: ; Mode of pathogenicity: None; Publications: 34124757; Phenotypes: Sturge-Weber syndrome, somatic, mosaic, OMIM:185300; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9590 | GNAQ | Eleanor Williams reviewed gene: GNAQ: Rating: ; Mode of pathogenicity: None; Publications: 34124757; Phenotypes: Sturge-Weber syndrome, somatic, mosaic, OMIM:185300; Mode of inheritance: None | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9511 | TFE3 | Zornitza Stark Phenotypes for gene: TFE3 were changed from TFE3-associated neurodevelopmental disorder; Intellectual disability; Epilepsy; Coarse facial features to Intellectual developmental disorder, X-linked, syndromic, with pigmentary mosaicism and coarse facies, MIM# 301066; Intellectual disability; Epilepsy; Coarse facial features | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9510 | TFE3 | Zornitza Stark edited their review of gene: TFE3: Changed phenotypes: Intellectual developmental disorder, X-linked, syndromic, with pigmentary mosaicism and coarse facies, MIM# 301066, Intellectual disability, Epilepsy, Coarse facial features | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| Mendeliome v0.9112 | TF | Zornitza Stark Phenotypes for gene: TF were changed from to Atransferrinaemia MIM# 209300; iron overload; hypochromic anaemia; low serum transferrin; Hemosiderosis of the heart and/or liver; Congestive heart failure | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9109 | TF | Danielle Ariti reviewed gene: TF: Rating: GREEN; Mode of pathogenicity: None; Publications: 11110675, 3472216; Phenotypes: Atransferrinaemia MIM# 209300, iron overload, hypochromic anaemia, low serum transferrin, Hemosiderosis of the heart and/or liver, Congestive heart failure; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9067 | CFAP206 |
Ain Roesley gene: CFAP206 was added gene: CFAP206 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CFAP206 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: CFAP206 were set to Multiple morphological abnormalities of the fagella Penetrance for gene: CFAP206 were set to unknown Review for gene: CFAP206 was set to AMBER Added comment: 1x hom with a fs variant Sperm from knockout mouse model mainly had a fagellum of normal length but most of them showed abnormal forms including bent and coiled fagella. There was also a significant increase of sperm cells with absent or short fagella compared to the WT mice. Sources: Literature |
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| Mendeliome v0.8968 | BLM | Zornitza Stark Phenotypes for gene: BLM were changed from to Bloom Syndrome MIM# 210900; Short stature, dysmorphic facies; sun-sensitive; immunoglobulin deficiency (IgA, IgG, IgM); erythema; marrow failure; leukaemia; lymphoma; chromosomal instability; predisposition to malignancies | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8953 | BLM | Danielle Ariti reviewed gene: BLM: Rating: GREEN; Mode of pathogenicity: None; Publications: 17407155, 9285778, 7585968, 8079989, 12242442, 11101838; Phenotypes: Bloom Syndrome MIM# 210900, Short stature, dysmorphic facies, sun-sensitive, immunoglobulin deficiency (IgA, IgG, IgM), erythema, marrow failure, leukaemia, lymphoma, chromosomal instability, predisposition to malignancies; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| Mendeliome v0.8848 | TCN2 |
Zornitza Stark changed review comment from: Well established gene-disease association. 26 pathogenic TCN2 variants have been reported in over 40 individuals; multiple mouse models Homologous and Compound Heterozygous TCN2 variants (deletions or insertions, nonsense mutations, and point mutations) have been reported; deletions or insertions are the most common, causing frameshifts that result in protein truncation. Individuals usually present within the first year of life with failure to thrive, diarrhoea, anaemia, pallor and agammaglobulinaemia. Sources: Expert list; to: Well established gene-disease association. 26 pathogenic TCN2 variants have been reported in over 40 individuals; multiple mouse models Homozygous and Compound Heterozygous TCN2 variants (deletions or insertions, nonsense mutations, and point mutations) have been reported; deletions or insertions are the most common, causing frameshifts that result in protein truncation. Individuals usually present within the first year of life with failure to thrive, diarrhoea, anaemia, pallor and agammaglobulinaemia. Sources: Expert list |
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| Mendeliome v0.8847 | TCN2 |
Zornitza Stark changed review comment from: Well established gene-disease association. Sources: Expert list; to: Well established gene-disease association. 26 pathogenic TCN2 variants have been reported in over 40 individuals; multiple mouse models Homologous and Compound Heterozygous TCN2 variants (deletions or insertions, nonsense mutations, and point mutations) have been reported; deletions or insertions are the most common, causing frameshifts that result in protein truncation. Individuals usually present within the first year of life with failure to thrive, diarrhoea, anaemia, pallor and agammaglobulinaemia. Sources: Expert list |
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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 v0.8834 | 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 |
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| 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 |
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| Mendeliome v0.8828 | CEP57 | Zornitza Stark Phenotypes for gene: CEP57 were changed from to Mosaic variegated aneuploidy syndrome 2, #MIM 614114 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8825 | CEP57 | Zornitza Stark reviewed gene: CEP57: Rating: GREEN; Mode of pathogenicity: None; Publications: 24259107, 21552266, 32861809, 30147898; Phenotypes: Mosaic variegated aneuploidy syndrome 2, #MIM 614114; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.8667 | 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 |
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| Mendeliome v0.8648 | MCM4 | Zornitza Stark Phenotypes for gene: MCM4 were changed from to Immunodeficiency 54 MIM# 609981; Decreased NK cell number and function; Viral infections (EBV, HSV, VZV); Short stature; B cell lymphoma; Adrenal failure; Failure to thrive; Microcephaly; Increased chromosomal breakage; Hyperpigmentation; Lymphadenopathy | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8644 | MCM4 | Zornitza Stark reviewed gene: MCM4: Rating: AMBER; Mode of pathogenicity: None; Publications: 22354167, 22354170, 22499342; Phenotypes: Immunodeficiency 54 MIM# 609981, Decreased NK cell number and function, Viral infections (EBV, HSV, VZV), Short stature, B cell lymphoma, Adrenal failure, Failure to thrive, Microcephaly, Increased chromosomal breakage, Hyperpigmentation, Lymphadenopathy; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.8527 | 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 v0.8522 | 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 |
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| Mendeliome v0.8367 | DCDC2 | Zornitza Stark changed review comment from: Only a single case with nephronophthisis, most reports are for cholangitis, though zebrafish model has renal cysts.; to: At least 5 families reported with cholangitis, and two with nephronophthisis, though zebrafish model has renal cysts. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 v0.7905 | 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. |
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| Mendeliome v0.7872 | MEF2C | Zornitza Stark Phenotypes for gene: MEF2C were changed from Chromosome 5q14.3 deletion syndrome, 613443; Mental retardation, stereotypic movements, epilepsy, and/or cerebral malformations, 613443 to Chromosome 5q14.3 deletion syndrome, 613443; Mental retardation, stereotypic movements, epilepsy, and/or cerebral malformations, 613443; MONDO:0013266 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| Mendeliome v0.7502 | YWHAG | Zornitza Stark Added comment: Comment when marking as ready: Developmental and epileptic encephalopathy-56 (DEE56) is a neurodevelopmental disorder characterized by early-onset seizures in most patients, followed by impaired intellectual development, variable behavioral abnormalities, and sometimes additional neurologic features, such as ataxia | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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." |
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| Mendeliome v0.7459 | SMARCA2 | Zornitza Stark Phenotypes for gene: SMARCA2 were changed from Nicolaides-Baraitser syndrome, MIM #601358; Blepharophimosis-intellectual disability syndrome to Nicolaides-Baraitser syndrome, MIM #601358; Blepharophimosis-intellectual disability syndrome, MIM#619293 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.7249 | NDUFB11 |
Kristin Rigbye changed review comment from: Variable syndromic features have been observed in affected individuals, however anaemia and cardiomyopathy appear to be consistent features in males and females, respectively (PMID: 28050600, PMID: 30423443, PMID: 27488349). Affected females have previously been reported with inherited pathogenic variants from their unaffected mothers. It has been suggested that this may be due to patterns of somatic X-chromosome inactivation, mosaicism or additional genetic or external factors (PMID: 28050600). Affected females have been reported with null alleles, whereas affected males have only been identified with missense variants or a recurrent single residue in-frame deletion, suggesting that some residual enzyme activity is required for males to be viable, whereas complete loss of function variants may be lethal when hemizygous (PMID: 30423443). Note: female carriers of missense variants have not been reported as clinically affected. Western blots from cells of male patients with the recurrent F93del variant showed reduced protein levels, and recombinant cells demonstrated a proliferation defect, consistent with the anaemia phenotype (PMID: 27488349).; to: Variable syndromic features have been observed in affected individuals, however anaemia and cardiomyopathy appear to be consistent features in males and females, respectively (PMID: 28050600, PMID: 30423443, PMID: 27488349). It has been suggested that heterozygous females do not display the severe phenotype associated with mitochondrial complex 1 deficiency due to highly skewed XCI favouring expression of the wild type allele, whereas these null variants result in a severe lethal disorder in hemizygous males (PMID: 25772934). Affected females have previously been reported with inherited pathogenic variants from their unaffected mothers. It has been suggested that this may be due to patterns of somatic X-chromosome inactivation, mosaicism or additional genetic or external factors (PMID: 28050600). Affected females have been reported with null alleles, whereas affected males have only been identified with missense variants or a recurrent single residue in-frame deletion, suggesting that some residual enzyme activity is required for males to be viable, whereas complete loss of function variants may be lethal when hemizygous (PMID: 30423443). Note: female carriers of missense variants have not been reported as clinically affected. Western blots from cells of male patients with the recurrent F93del variant showed reduced protein levels, and recombinant cells demonstrated a proliferation defect, consistent with the anaemia phenotype (PMID: 27488349). |
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| 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 v0.7161 | PSAP |
Zornitza Stark changed review comment from: Well established gene-disease association for bi-allelic variants. Early-onset PD reported with mono-allelic variants.; to: Well established gene-disease association for bi-allelic variants. Early-onset PD reported with mono-allelic variants. The PSAP gene encodes saposins A, B, C and D. Variants resulting in PSAP null allele can be shared in patients with the deficit of other saposins (A-D) or whole prosaposin. The patient's phenotype depends then on the nature of the second allele - atypical Gaucher disease in case of saposin A, MLD in case of saposin B, and Krabbe disease in case of saposin C impairing mutations. The clinically most severe prosaposin deficit is caused by the presence of two PSAP null alleles. |
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| 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 |
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| Mendeliome v0.7073 | SLC10A1 |
Zornitza Stark gene: SLC10A1 was added gene: SLC10A1 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: SLC10A1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SLC10A1 were set to 24867799; 27882152; 28835676; 29290974; 31201272 Phenotypes for gene: SLC10A1 were set to Familial hypercholanemia-2, MIM#619256 Review for gene: SLC10A1 was set to GREEN Added comment: IEM characterised by persistently increased plasma levels of conjugated bile salts apparent from infancy. Most patients are asymptomatic and have no liver dysfunction, although some neonates may have transient jaundice or transiently elevated liver enzymes. These abnormalities improve with age. The bile acid defect can result in impaired absorption of fat-soluble vitamins, including D and K, causing decreased bone mineral density or prolonged prothrobin time (PT). Some variants are recurrent (founder effect likely) but at least 3 different variants reported, mouse model. Sources: Expert list |
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| Mendeliome v0.7032 | AGA | Zornitza Stark edited their review of gene: AGA: Added comment: Aspartylglucosaminuria (AGU) is a severe autosomal recessive lysosomal storage disorder that involves the central nervous system and causes skeletal abnormalities as well as connective tissue lesions. The most characteristic feature is progressive mental retardation. Multiple families and mouse model.; Changed publications: 1703489, 1904874, 8064811, 8946839; Changed phenotypes: Aspartylglucosaminuria, MIM# 208400, MONDO:0008830 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.6819 | SCA3 |
Bryony Thompson STR: SCA3 was added STR: SCA3 was added to Mendeliome. Sources: Expert list Mode of inheritance for STR: SCA3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: SCA3 were set to 20301375; 29325606 Phenotypes for STR: SCA3 were set to Machado-Joseph disease MIM#109150; Spinocerebellar ataxia type 3 Review for STR: SCA3 was set to GREEN STR: SCA3 was marked as clinically relevant Added comment: NM_004993.5:c.886_888CAG[X] Toxic aggregation and mislocalization in neurons is mechanism of disease Normal: ≤44 repeats, mostly <31 repeats Intermediate: 45-59 repeats, some intermediate alleles are not associated with classic clinical features of SCA3 Pathogenic (full penetrance): ≥60 repeats Sources: Expert list |
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| Mendeliome v0.6808 | SATB1 | Zornitza Stark edited their review of gene: SATB1: Added comment: Kohlschutter-Tonz syndrome-like (KTZSL) is characterized by global developmental delay with moderately to severely impaired intellectual development, poor or absent speech, and delayed motor skills. Although the severity of the disorder varies, many patients are nonverbal and have hypotonia with inability to sit or walk. Early-onset epilepsy is common and may be refractory to treatment, leading to epileptic encephalopathy and further interruption of developmental progress. Most patients have feeding difficulties with poor overall growth and dysmorphic facial features, as well as significant dental anomalies resembling amelogenesis imperfecta. This phenotype was reported in 28 patients (patients 13 to 40, PMID 33513338), including 9 patients from 3 families. Most variants were de novo, though some were inherited, suggestive of incomplete penetrance and variable expressivity.; Changed phenotypes: Developmental delay with dysmorphic facies and dental anomalies, MIM# 619228, Kohlschutter-Tonz syndrome-like, MIM# 619229 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6808 | SATB1 | Zornitza Stark commented on gene: SATB1: Developmental delay with dysmorphic facies and dental anomalies (DEFDA) is characterized by generally mild global developmental delay with variably impaired intellectual development, walking by 2 to 3 years, and slow language acquisition. The severity of the disorder ranges from moderate cognitive deficits to mild learning difficulties or behavioral abnormalities. Most patients have dysmorphic facial features, often with abnormal dentition and nonspecific visual defects, such as myopia, astigmatism, and strabismus. Although rare, involvement of other systems, such as skeletal, cardiac, and gastrointestinal, may be present. 12 individuals from 11 families reported (one inherited variant, affected parent). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| Mendeliome v0.6652 | YY1AP1 | Zornitza Stark commented on gene: YY1AP1: Grange syndrome: multiple arterial stenoses, severe early onset hypertension, fibromuscular dysplasia, variable penetrance of brachydactyly, syndactyly, bone fragility, and learning disabilities. Missense variant reported PMID: 31633303 with moyamoya like phenotype in adult case; fibroblasts suggest that the p.Pro360Leu variant decreases the stability of the YY1AP1 protein but most LOF. PMID: 30556293 non coding variants reported (intronic variants leading to aberrant splicing) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| Mendeliome v0.6311 | OTUD5 | Zornitza Stark edited their review of gene: OTUD5: Added comment: PMID 33523931: Another 10 individuals from 7 families reported, promote to Green. X-linked multiple congenital anomalies-neurodevelopmental syndrome (MCAND) is an X-linked recessive congenital multisystemic disorder characterized by poor growth, global developmental delay with impaired intellectual development, and variable abnormalities of the cardiac, skeletal, and genitourinary systems. Most affected individuals also have hypotonia and dysmorphic craniofacial features. Brain imaging typically shows enlarged ventricles and thin corpus callosum; some have microcephaly, whereas others have hydrocephalus. The severity of the disorder is highly variable, ranging from death in early infancy to survival into the second or third decade.; Changed rating: GREEN; Changed publications: 33131077, 33523931; Changed phenotypes: Multiple congenital anomalies-neurodevelopmental syndrome, X-linked, MIM# 301056 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6195 | DNAJC30 |
Zornitza Stark gene: DNAJC30 was added gene: DNAJC30 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DNAJC30 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: DNAJC30 were set to 33465056 Phenotypes for gene: DNAJC30 were set to Leber Hereditary Optic Neuropathy Review for gene: DNAJC30 was set to GREEN Added comment: 33 individuals from 29 families had homozygous DNAJC30 missense variants. Three different variants identified (one responsible for most cases). All three variants absent from gnomAD. Incomplete penetrance and male predominance in affected individuals both typical of LHON due to mtDNA mutations. All 3 variants in the J domain of the protein. Functional evidence. Sources: Literature |
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| 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 |
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| Mendeliome v0.6164 | MYADML2 |
Paul De Fazio gene: MYADML2 was added gene: MYADML2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MYADML2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MYADML2 were set to 32778762 Phenotypes for gene: MYADML2 were set to Cranial asymmetry, reduced bone maturation, multiple dislocations, lumbar lordosis, and prominent clavicles Review for gene: MYADML2 was set to RED gene: MYADML2 was marked as current diagnostic Added comment: 5 sibs from a consanguineous family identified to have biallelic deletion encompassing part of the PYCR1 gene and the coding region of the MYADML2 gene. According to the authors: "All five affected sibs had the most common features of ARCL (autosomal recessive cutis laxa) but not many of the less common ones. We attributed the anomalies not typical for ARCL to MYADML2 deficit, because no other genetic defect possibly a candidate to underlie the skeletal phenotype was found." Phenotype may still be explained by the PYCR1 deletion alone. Sources: Literature |
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| 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 v0.6018 | 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 |
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| 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 |
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| 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. |
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| 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." |
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| 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." |
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| 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 v0.5563 | BICRA | Elena Savva Added comment: Comment when marking as ready: 12 individuals reported, 11 de novo (1 not resolved), "with neurodevelopmental phenotypes—developmental delay (HP:0001263), intellectual disability (HP:0001249), autism spectrum disorder (HP:0000729), and/or behavioral phenotypes (HP:0000708)—and variable structural birth defects and dysmorphic features". Mostly LoF or gene deletions, but 2 missense reported. Zebrafish model supports the gene-disease association. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| Mendeliome v0.5554 | BICRA |
Paul De Fazio gene: BICRA was added gene: BICRA was added to Mendeliome. Sources: Literature Mode of inheritance for gene: BICRA was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: BICRA were set to 33232675 Phenotypes for gene: BICRA were set to Developmental delay, intellectual disability, autism spectrum disorder,behavioral abnormalities, dysmorphic features Review for gene: BICRA was set to GREEN gene: BICRA was marked as current diagnostic Added comment: 12 individuals reported, 11 de novo (1 not resolved), "with neurodevelopmental phenotypes—developmental delay (HP:0001263), intellectual disability (HP:0001249), autism spectrum disorder (HP:0000729), and/or behavioral phenotypes (HP:0000708)—and variable structural birth defects and dysmorphic features". Mostly LoF or gene deletions, but 2 missense reported. Zebrafish model supports the gene-disease association. Sources: Literature |
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| Mendeliome v0.5553 | KDM4B |
Kristin Rigbye gene: KDM4B was added gene: KDM4B was added to Mendeliome. Sources: Literature Mode of inheritance for gene: KDM4B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KDM4B were set to PMID: 33232677 Phenotypes for gene: KDM4B were set to Global developmental delay, intellectual disability and neuroanatomical defects Review for gene: KDM4B was set to GREEN Added comment: Nine individuals with mono-allelic de novo or inherited variants in KDM4B. All individuals presented with dysmorphic features and global developmental delay (GDD) with language and motor skills most affected. Three individuals had a history of seizures, and four had anomalies on brain imaging ranging from agenesis of the corpus callosum with hydrocephalus to cystic formations, abnormal hippocampi, and polymicrogyria. In a knockout mouse the total brain volume was significantly reduced with decreased size of the hippocampal dentate gyrus, partial agenesis of the corpus callosum, and ventriculomegaly. Sources: Literature |
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| 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 |
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| 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 v0.5483 | 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 v0.5378 | MYRF | Zornitza Stark Phenotypes for gene: MYRF were changed from Nanophthalmos; High hyperopia to Nanophthalmos and high hyperopia; Cardiac-urogenital syndrome, MIM# 618280; Encephalitis/encephalopathy, mild, with reversible myelin vacuolization, MIM# 618113 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5376 | MYRF | Zornitza Stark edited their review of gene: MYRF: Added comment: Association with Encephalitis/encephalopathy, mild, with reversible myelin vacuolization 618113: limited evidence, two multiplex families with same missense variant (likely founder effect) reported (p.Gln403Arg); Changed publications: 31048900, 31172260, 31266062, 31700225, 29446546, 29446546, 30532227, 31069960, 29265453; Changed phenotypes: Nanophthalmos and high hyperopia, Cardiac-urogenital syndrome, MIM# 618280, Encephalitis/encephalopathy, mild, with reversible myelin vacuolization, MIM# 618113 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.5376 | MYRF |
Zornitza Stark changed review comment from: Multiple affected individuals reported. Sources: Expert list; to: Multiple affected individuals reported with nanophthalmos and high hyperopia and C-terminal frameshift variants, with or without dextrocardia or congenital diaphragmatic hernia. Sources: Expert list |
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| Mendeliome v0.5369 | FGFR1 | Zornitza Stark Phenotypes for gene: FGFR1 were changed from to Encephalocraniocutaneous lipomatosis, somatic mosaic 613001; Hartsfield syndrome 615465; Hypogonadotropic hypogonadism 2 with or without anosmia 147950; Jackson-Weiss syndrome 123150; Osteoglophonic dysplasia 166250; Pfeiffer syndrome 101600; Trigonocephaly 1 190440 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5357 | FGFR1 | Elena Savva reviewed gene: FGFR1: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 18034870, 23812909, 26942290; Phenotypes: Encephalocraniocutaneous lipomatosis, somatic mosaic 613001, Hartsfield syndrome 615465, Hypogonadotropic hypogonadism 2 with or without anosmia 147950, Jackson-Weiss syndrome 123150, Osteoglophonic dysplasia 166250, Pfeiffer syndrome 101600, Trigonocephaly 1 190440; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Mendeliome v0.4817 | BUB1B | Zornitza Stark Phenotypes for gene: BUB1B were changed from to Mosaic variegated aneuploidy syndrome 1, MIM# 257300; Premature ovarian failure | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4814 | BUB1B | Zornitza Stark reviewed gene: BUB1B: Rating: GREEN; Mode of pathogenicity: None; Publications: 32716490, 18548531; Phenotypes: Mosaic variegated aneuploidy syndrome 1, MIM# 257300, Premature ovarian failure; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4667 | FOXL2 | Zornitza Stark Phenotypes for gene: FOXL2 were changed from to Blepharophimosis, epicanthus inversus, and ptosis, type 1 with premature ovarian insufficiency (POI) and type II without POI (MIM# 110100) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4664 | FOXL2 | Ain Roesley reviewed gene: FOXL2: Rating: GREEN; Mode of pathogenicity: None; Publications: 31077882, 18642388, 17089161; Phenotypes: Blepharophimosis, epicanthus inversus, and ptosis, type 1 with premature ovarian insufficiency (POI) and type II without POI (MIM# 110100); Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.4503 | 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 |
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| 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 |
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| Mendeliome v0.4493 | TAOK1 | Zornitza Stark changed review comment from: Monoallelic de novo variants reported in 8 individuals with nonspecific phenotype of intellectual disability and hypotonia. Most were LOF, 2 missense. 3 had macrocephaly.; to: Monoallelic de novo variants reported in 8 individuals with nonspecific phenotype of intellectual disability and hypotonia; 3 had macrocephaly. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.4309 | 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 |
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| 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 |
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| Mendeliome v0.4292 | TRIP13 | Zornitza Stark Phenotypes for gene: TRIP13 were changed from to Mosaic variegated aneuploidy syndrome 3, MIM# 617598; Oocyte maturation defect 9, MIM# 619011 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4289 | TRIP13 | Zornitza Stark reviewed gene: TRIP13: Rating: GREEN; Mode of pathogenicity: None; Publications: 28553959, 32473092; Phenotypes: Mosaic variegated aneuploidy syndrome 3, MIM# 617598, Oocyte maturation defect 9, MIM# 619011; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4230 | MCM10 |
Zornitza Stark gene: MCM10 was added gene: MCM10 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MCM10 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MCM10 were set to 32865517 Phenotypes for gene: MCM10 were set to Susceptibility to CMV Review for gene: MCM10 was set to RED Added comment: Compound heterozygous variants in minichromosomal maintenance complex member 10 (MCM10) reported as a cause of NK-cell deficiency in a child with fatal susceptibility to CMV. Sources: Literature |
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| Mendeliome v0.3736 | SMO | Zornitza Stark Phenotypes for gene: SMO were changed from Microcephaly, congenital heart disease, polydactyly, aganglionosis; Curry-Jones syndrome, somatic mosaic 601707 to Microcephaly, congenital heart disease, polydactyly, aganglionosis, Pallister-Hall-like syndrome, MIM# 241800; Curry-Jones syndrome, somatic mosaic 601707 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3735 | SMO | Zornitza Stark edited their review of gene: SMO: Changed phenotypes: Microcephaly, congenital heart disease, polydactyly, aganglionosis, Pallister-Hall-like syndrome, MIM# 241800, Curry-Jones syndrome, somatic mosaic 601707 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.3643 | NARS |
Zornitza Stark gene: NARS was added gene: NARS was added to Mendeliome. Sources: Literature Mode of inheritance for gene: NARS was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: NARS were set to 32738225 Phenotypes for gene: NARS were set to Abnormal muscle tone; Microcephaly; Global developmental delay; Intellectual disability; Seizures; Ataxia; Abnormality of the face; Demyelinating peripheral neuropathy Review for gene: NARS was set to GREEN Added comment: [Please note that HGNC Approved Gene Symbol for this gene is NARS1] Manole et al (2020 - PMID: 32738225) provide evidence that both biallelic and monoallelic (de novo) pathogenic NARS1 variants cause a neurodevelopmental disorder. In total 32 individuals from 21 families are reported, with biallelic variants identified in individuals from 13 families and de novo in 8 families. Similar features were reported for AR/AD occurrences of the disorder and included microcephaly (90% - most often primary), epilepsy (23/32 or 74% - variable semiology incl. partial/myoclonic/generalized tonic-clonic seizures), DD and ID (as a universal feature), abnormal tone in several (hypotonia/spasticity), ataxia, demyelinating peripheral neuropathy (in 3 or more for each inheritance mode - or a total of 25%). Some individuals had dysmorphic features. NARS1 encodes an aminoacyl-tRNA synthetase (ARS) [asparaginyl-tRNA synthetase 1]. Aminoacyl-tRNA synthetases constitute a family of enzymes catalyzing attachment of amino-acids to their cognate tRNAs. As the authors comment, mutations in genes encoding several other ARSs result in neurological disorders ranging from peripheral neuropathy to severe multi-systemic NDD. Dominant, recessive or both modes for inheritance for mutations in the same gene (e.g. AARS1, YARS1, MARS1, etc) have been reported. Some variants were recurrent, e.g. the c.1600C>T / p.Arg534* which occurred in 6 families as a de novo event or c.1633C>T p.Arg545Cys (homozygous in 6 families). 3 different variants were reported to have occured de novo (c.965G>T - p.Arg322Leu, c.1525G>A - p.Gly509Ser, p.Arg534*) with several other variants identified in hmz/compound htz individuals. A single SNV (c.1067A>C - p.Asp356Ala) was suggested to be acting as modifier and pathogenic only when in trans with a severe variant. [NM_004539.4 used as RefSeq for all]. The authors provide several lines of evidence for a partial loss-of-function effect (e.g. reduction in mRNA expression, enzyme levels and activity in fibroblasts or iNPCs) underlying pathogenicity of the variants identified in individuals with biallelic variants. A gain-of-function (dominant-negative) effect is proposed for de novo variants (such effect also demonstrated for the p.Arg534* in a zebrafish model). Sources: Literature |
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| Mendeliome v0.3539 | LARS |
Zornitza Stark Added comment: Comment when marking as ready: Lenz et al (2020 - PMID: 32699352) review the phenotype of 25 affected individuals from 15 families. Seizures occurred in 19/24 and were commonly associated with infections. Encephalopathic episodes (in 13 patients) accompanied by seizures up to status epilepticus occurred independently of hepatic decompensation. In addition 22/24 presented with neurodevelopmental delay. The authors comment that cognitive impairment was present in 13/17 individuals (mild-severe) whereas most presented with learning disabilities. These patients will most likely investigated for their liver disease (although presentation was highly variable and/or very mild in few). The gene encodes a cytoplasmic amino-acyl tRNA synthetase (ARS) with neurologic manifestations observed in almost all patients (and seizures / DD and ID common to other disorders due to mutations in other genes encoding for ARSs). Please note that the HGNC approved symbol for this gene is LARS1. |
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| Mendeliome v0.3517 | SMARCA2 | Zornitza Stark Phenotypes for gene: SMARCA2 were changed from to Nicolaides-Baraitser syndrome, MIM #601358; Blepharophimosis-intellectual disability syndrome | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3513 | SMARCA2 | Zornitza Stark reviewed gene: SMARCA2: 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: 26468571, 32694869; Phenotypes: Nicolaides-Baraitser syndrome, MIM #601358, Blepharophimosis-intellectual disability syndrome; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 |
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| 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 |
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| Mendeliome v0.3240 | KIAA1217 |
Zornitza Stark gene: KIAA1217 was added gene: KIAA1217 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: KIAA1217 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KIAA1217 were set to 32369272 Phenotypes for gene: KIAA1217 were set to Vertebral anomalies, syndromic and non-syndromic Review for gene: KIAA1217 was set to AMBER Added comment: 10 families reported, however note only 3 of the variants were absent from gnomad, inheritance not reported, most variants are missense. Sources: Literature |
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| 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 |
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| Mendeliome v0.3116 | MEF2C | Zornitza Stark Phenotypes for gene: MEF2C were changed from to Chromosome 5q14.3 deletion syndrome, 613443; Mental retardation, stereotypic movements, epilepsy, and/or cerebral malformations, 613443 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3111 | MEF2C | Elena Savva reviewed gene: MEF2C: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Chromosome 5q14.3 deletion syndrome, 613443, Mental retardation, stereotypic movements, epilepsy, and/or cerebral malformations, 613443; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3027 | SMO | Zornitza Stark Phenotypes for gene: SMO were changed from to Microcephaly, congenital heart disease, polydactyly, aganglionosis; Curry-Jones syndrome, somatic mosaic 601707 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3024 | SMO | Zornitza Stark reviewed gene: SMO: Rating: GREEN; Mode of pathogenicity: None; Publications: 32413283, 27236920; Phenotypes: Microcephaly, congenital heart disease, polydactyly, aganglionosis, Curry-Jones syndrome, somatic mosaic 601707; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3010 | OTUD7A |
Zornitza Stark gene: OTUD7A was added gene: OTUD7A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: OTUD7A was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: OTUD7A were set to 31997314 Phenotypes for gene: OTUD7A were set to Epileptic encephalopathy, no OMIM# yet Review for gene: OTUD7A was set to RED Added comment: One patient with severe global developmental delay, language impairment and epileptic encephalopathy. Homozygous OTUD7A missense variant (c.697C>T, p.Leu233Phe), predicted to alter an ultraconserved amino acid, lying within the OTU catalytic domain. Its subsequent segregation analysis revealed that the parents, presenting with learning disability, and brother were heterozygous carriers. Biochemical assays demonstrated that proteasome complex formation and function were significantly reduced in patient‐derived fibroblasts and in OTUD7A knockout HAP1 cell line. Gene lies in the chromosome 15q13.3 region. Heterozygous microdeletions of chromosome 15q13.3 show incomplete penetrance and are associated with a highly variable phenotype that may include intellectual disability, epilepsy, facial dysmorphism and digit anomalies. Sources: Literature |
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| Mendeliome v0.2885 | BCR | Zornitza Stark Phenotypes for gene: BCR were changed from to Leukemia, acute lymphocytic, Philadelphia chromosome positive, somatic 613065; Leukemia, chronic myeloid, Philadelphia chromosome positive, somatic 608232 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2883 | BCR | Zornitza Stark reviewed gene: BCR: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: Leukemia, acute lymphocytic, Philadelphia chromosome positive, somatic 613065, Leukemia, chronic myeloid, Philadelphia chromosome positive, somatic 608232; Mode of inheritance: None | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2876 | KRAS | Zornitza Stark Phenotypes for gene: KRAS were changed from to Cardiofaciocutaneous syndrome 2 615278; Noonan syndrome 3 609942; RAS-associated autoimmune leukoproliferative disorder 614470; Schimmelpenning-Feuerstein-Mims syndrome, somatic mosaic 163200 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2861 | KRAS | Elena Savva reviewed gene: KRAS: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 23059812, 17056636; Phenotypes: Arteriovenous malformation of the brain, somatic 108010, Bladder cancer, somatic 109800, Breast cancer, somatic 114480, Cardiofaciocutaneous syndrome 2 615278, Gastric cancer, somatic 137215, Leukemia, acute myeloid 601626, . Lung cancer, somatic 211980, Noonan syndrome 3 609942, Pancreatic carcinoma, somatic 260350, RAS-associated autoimmune leukoproliferative disorder 614470, Schimmelpenning-Feuerstein-Mims syndrome, somatic mosaic 163200; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2859 | JARID2 |
Zornitza Stark gene: JARID2 was added gene: JARID2 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: JARID2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: JARID2 were set to 23294540 Phenotypes for gene: JARID2 were set to Intellectual disability Review for gene: JARID2 was set to AMBER Added comment: Emerging evidence that haploinsufficiency causes neurodevelopmental phenotypes, mostly based on CNV data to date. Sources: Expert Review |
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| Mendeliome v0.2786 | TOMM70 |
Zornitza Stark gene: TOMM70 was added gene: TOMM70 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: TOMM70 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: TOMM70 were set to 31907385; 32356556 Phenotypes for gene: TOMM70 were set to Severe anaemia, lactic acidosis, developmental delay; White matter abnormalities, developmental delay, regression, movement disorder Review for gene: TOMM70 was set to AMBER Added comment: TOM70 is a member of the TOM complex that transports cytosolic proteins into mitochondria. Bi-allelic disease: one individual reported with compound heterozygous variants in TOMM70 [c.794C>T (p.T265M) and c.1745C>T (p.A582V)]. Clinical features included severe anaemia, lactic acidosis, and developmental delay. Some functional data: in vitro cell model compensatory experiments. Monoallelic disease: de novo mono allelic variants in the C-terminal region of TOMM70 reported in two individuals. While both individuals exhibited shared symptoms including hypotonia, hyperreflexia, ataxia, dystonia, and significant white matter abnormalities, there were differences between the two individuals, most prominently the age of symptom onset, with one experiencing episodes of regression. Some functional data. Sources: Expert list |
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| 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 v0.2758 | CDC42BPB |
Zornitza Stark gene: CDC42BPB was added gene: CDC42BPB was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CDC42BPB was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CDC42BPB were set to 32031333 Phenotypes for gene: CDC42BPB were set to Central hypotonia; Global developmental delay; Intellectual disability; Seizures; Autistic behavior; Behavioral abnormality Review for gene: CDC42BPB was set to GREEN Added comment: 14 individuals with missense and loss-of-function CDC42BPB variants reported. Features included hypotonia (8/11), DD (12/13 - the 14th was a fetus), ID (7/13), ASD (8/12), clinical seizures (in 3 - a 4th had abnormal EEG without seizures), behavioral abnormalities. Variable non-specific dysmorphic features were reported in some (sparse hair being the most frequent - 4/8). Additional features were observed in few (=<4) incl. cryptorchidism, ophthalmological issues, constipation, kidney abnormalities, micropenis, etc. Most variants occurred as de novo events (11/14) while inheritance was not available for few (3/14). Sources: Literature |
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| 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 v0.2439 | POLR1B |
Paul De Fazio changed review comment from: 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; to: 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 |
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| 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 |
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| Mendeliome v0.2365 | SAMD12 |
Melanie Marty gene: SAMD12 was added gene: SAMD12 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SAMD12 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SAMD12 were set to 30194086; 29507423 Phenotypes for gene: SAMD12 were set to Epilepsy, familial adult myoclonic, 1 601068 Review for gene: SAMD12 was set to GREEN Added comment: Repeat expansions of intronic TTTCA and TTTTA motifs within SAMD12 have been identified in over 50 Japanese and Chinese families. Most families with affected individuals were heterozygous however 4 patients from 3 families had homozygous repeat expansions, which was associated with a more severe phenotype. Western blot analysis showed decreased levels of the protein in patient brains. Sources: Literature |
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| 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 |
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| 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 |
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| 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 v0.1913 | REL |
Zornitza Stark gene: REL was added gene: REL was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: REL was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: REL were set to 31103457 Phenotypes for gene: REL were set to Combined immunodeficiency; T cells: normal, decreased memory CD4, poor proliferation; B cells: low, mostly naive, few switched memory B cells, impaired proliferation; Recurrent infections with bacteria, mycobacteria, salmonella and opportunistic organisms; Defective innate immunity Review for gene: REL was set to RED Added comment: Single individual from consanguineous family reported with homozygous canonical splice site variant, no functional data. Sources: Expert list |
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| Mendeliome v0.1788 | ZNF462 | Zornitza Stark Added comment: Comment when marking as ready: Multiple congenital anomaly syndrome characterised by variable but usually mild global developmental delay and common craniofacial abnormalities, including ptosis, abnormal head shape, downslanting palpebral fissures, epicanthal folds, arched eyebrows, and short upturned nose. Many patients have hypotonia and feeding difficulties. A few patients show agenesis of the corpus callosum on brain imaging. Most cases occur sporadically, but there are rare familial cases that show highly variable expressivity in the phenotypic manifestations. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.1025 | MYRF |
Zornitza Stark gene: MYRF was added gene: MYRF was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: MYRF was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MYRF were set to 31048900; 31172260; 31266062; 31700225 Phenotypes for gene: MYRF were set to Nanophthalmos; High hyperopia Review for gene: MYRF was set to GREEN gene: MYRF was marked as current diagnostic Added comment: Multiple affected individuals reported. Sources: Expert list |
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| Mendeliome v0.989 | AGO1 |
Zornitza Stark gene: AGO1 was added gene: AGO1 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: AGO1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: AGO1 were set to 30213762; 22495306; 23020937; 25363768; 25356899; 27620904; 29346770; 28135719 Phenotypes for gene: AGO1 were set to Intellectual disability; autism Review for gene: AGO1 was set to GREEN Added comment: Multiple individuals reported with de novo variants in this gene, most as part of large ID cohorts so phenotypic information is scarce; however, given large number I have rated as Green. Sources: Expert list |
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| 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 |
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| Mendeliome v0.797 | TET3 |
Zornitza Stark gene: TET3 was added gene: TET3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TET3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: TET3 were set to 31928709 Phenotypes for gene: TET3 were set to Intellectual disability; dysmorphic features; abnormal growth; movement disorders Review for gene: TET3 was set to GREEN Added comment: Eleven individuals from 8 families described. Mono-allelic frameshift and nonsense variants occur throughout the coding region. Mono-allelic and bi-allelic missense variants localize to conserved residues; all but one such variant occur within the catalytic domain, and most display hypomorphic function in an assay of catalytic activity. Sources: Literature |
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| Mendeliome v0.754 | NSMCE3 | Zornitza Stark Phenotypes for gene: NSMCE3 were changed from to Lung disease, immunodeficiency, and chromosome breakage syndrome, MIM#617241 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.751 | NSMCE3 | Zornitza Stark reviewed gene: NSMCE3: Rating: AMBER; Mode of pathogenicity: None; Publications: 27427983; Phenotypes: Lung disease, immunodeficiency, and chromosome breakage syndrome, MIM#617241; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.697 | RHOA |
Sue White gene: RHOA was added gene: RHOA was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: RHOA was set to Other Publications for gene: RHOA were set to 31570889 Phenotypes for gene: RHOA were set to normal cognition; leukoencephalopathy; micro-ophthalmia; strabismus; linear hypopigmentation; malar hypoplasia; downslanting palpebral fissures; microstomia Penetrance for gene: RHOA were set to Complete Review for gene: RHOA was set to GREEN gene: RHOA was marked as current diagnostic Added comment: mosaic heterozygous missense variants cause linear hypopigmentation, brain MRI changes with normal cognition, ocular and acral changes Sources: Literature |
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| Mendeliome v0.309 | POU3F3 |
Zornitza Stark gene: POU3F3 was added gene: POU3F3 was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: POU3F3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: POU3F3 were set to 24550763; 31303265 Phenotypes for gene: POU3F3 were set to Intellectual disability Review for gene: POU3F3 was set to GREEN Added comment: 19 individuals with DD/ID/speech issues and heterozygous POU3F3 disruptions, most of which were de novo variants. Positive functional cell-based analyses of pathogenic variants. 1 patient reported with whole gene deletion and ID. Sources: Literature |
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| Mendeliome v0.287 | MACROD2 |
Zornitza Stark gene: MACROD2 was added gene: MACROD2 was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: MACROD2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MACROD2 were set to 31055587 Phenotypes for gene: MACROD2 were set to intellectual disability; dysmorphic features; microcephaly Review for gene: MACROD2 was set to RED Added comment: 1 family with a few affected with microcephaly, ID, dysmorphic features, and polydactyly. Deletion of chromosome 20p12.1 involving the MACROD2 gene was found in several members of the family. qRT-PCR showed higher levels of a MACROD2 mRNA isoform in the individuals carrying the deletion. Sources: Literature |
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| 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 |
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| Mendeliome v0.239 | SEMA5A |
Zornitza Stark gene: SEMA5A was added gene: SEMA5A was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: SEMA5A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SEMA5A were set to 26395558 Phenotypes for gene: SEMA5A were set to Intellectual disability; autism Review for gene: SEMA5A was set to AMBER Added comment: 1 patient with de novo translocation t(5;22)(p15.3;q11.21) and ASD and ID. At the translocation breakpoint on chromosome 5, they observed a 861-kb deletion encompassing the end of the SEMA5A gene. No functional studies. 2 patients with ASD and predicted deleterious heterozygous variants (maternally inherited). No functional studies Sources: Literature |
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| 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 |
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