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| Mendeliome v1.2166 | POLA2 |
Sangavi Sivagnanasundram gene: POLA2 was added gene: POLA2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: POLA2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: POLA2 were set to 39616267 Phenotypes for gene: POLA2 were set to Telomere biology disorders; Coats plus syndrome MONDO:0012815 Review for gene: POLA2 was set to GREEN Added comment: New gene-disease association. PMID: 39616267 - Five individuals from two unrelated swedish families presenting with clinical phenotype suggestive of a TBD disorder with Coats plus features including retinal and gastrointestinal telangiectasias. Affected individuals also presented with shortened telomeres. Compound heterozygous variants were identified in both families. Family A (Ile96Thr;Pro424Leu) - Both variants are present in gnomAD v4.1 but FAF is rare enough for AR condition [c.287 T > C, p.(Ile96Thr) - FAF 0.002%; c.1271 C > T, p.(Pro424Leu) - FAF 0.0002 %] Family B (Ile96Thr; intragenic SNV resulting in the deletion of the 5’ terminal and exon 1) - same missense as the other family along with an SNV. In vitro assay using CRISPR/Cas9 genome engineering into HEK293T to assess whether the p.(Ile96Thr) would affect telomere length. The subclones carrying the missense variant showed telomeric shortening of ~4kb compared to the WT subclones. Sources: Literature |
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| Mendeliome v1.2099 | UBTF |
Zornitza Stark edited their review of gene: UBTF: Added comment: PMID 39366741: 3 Chinese patients with global developmental delay, intellectual disability, social challenges and dysmorphism (wide forehead, sparse eyebrows, hypertelorism, narrow palpebral fissures, single-fold eyelids, flat nasal bridge, anteverted nares, a long philtrum and a thin upper lip), but no neuroregression (but aged 1.8yrs-4.8yrs). WES with SNV/CNV analysis showed: -nonsense variant c.1327C>T p. (Arg443Ter) - parental segregation not possible -de novo ~46 kb deletion at 17q21.31 containing 7 genes but UBTF as only OMIM Morbid gene -de novo ~106kb deletion at 17q21.31 containing 10 genes but UBTF as only relevant OMIM Morbid gene (other one was SLC4A1) Propose haploinsufficiency presents with different phenotype to CONDBA which is due to GOF variant. AMBER for this mechanism and phenotype.; Changed publications: 28777933, 29300972, 39366741; Changed phenotypes: Neurodegeneration, childhood-onset, with brain atrophy, MIM# 617672, MONDO:0044701, Neurodevelopmental disorder, MONDO:0700092, UBTF-related |
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| Mendeliome v1.2087 | MARK2 |
Chirag Patel gene: MARK2 was added gene: MARK2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MARK2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MARK2 were set to PMID: 39419027, 39436150 Phenotypes for gene: MARK2 were set to Neurodevelopmental disorder MONDO:0700092 Mode of pathogenicity for gene: MARK2 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: MARK2 was set to GREEN Added comment: 31 individuals with autism spectrum disorder (30/31), intellectual disability/developmental delay (100%), motor delay (62%), speech-language problems (100%), seizure/epilepsy (46%), behaviour disorders (ADHD, aggression, anxiety)(74%), and distinctive facial features (narrow face, abnormal or broad forehead, downslanting palpebral fissures, and large or dysplastic ears). WES/WGS identified 25 LOF and 6 missense variants in MARK2 gene (Microtubule affinity-regulating kinase 2) which contributes to establishing neuronal polarity and developing dendritic spines. LOF variants were de novo (16/25), inherited (4/25), or unk (5/25). All 6 missense variants were de novo and clustered in the kinase or KA1 domains. The mRNA and protein expression of MARK2 in PBMCs were significantly lower in affected individuals with LOF variants than in the control group. In vitro expression assay of missense variants supported the effect of MARK2 loss. Proband-derived and CRISPR-engineered isogenic induced pluripotent stem cells (iPSCs) showed MARK2 loss leads to early neuronal developmental and functional deficits, including anomalous polarity and disorganization in neural rosettes, as well as imbalanced proliferation and differentiation in neural progenitor cells (NPCs). Mark2+/- mice showed abnormal cortical formation and partition and ASD-like behaviour. Through the use of RNA sequencing (RNA-seq) and lithium treatment, they linked MARK2 loss to downregulation of the WNT/β-catenin signaling pathway and identified lithium as a potential drug for treating MARK2-associated ASD. 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 v1.1734 | PQLC2 |
Chirag Patel gene: PQLC2 was added gene: PQLC2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PQLC2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PQLC2 were set to PMID: 35486108; and online publication GiM Feb 2024 Phenotypes for gene: PQLC2 were set to Retinitis pigmentosa, MONDO:0019200 Review for gene: PQLC2 was set to GREEN gene: PQLC2 was marked as current diagnostic Added comment: HGNC Gene Symbol: SLC66A1 Total 8 individuals from 6 families. Millo et al. (2022)(PMID: 35486108) - WES (with targeted analysis of SLC genes) in 913 cases from 785 families with inherited retinal dystrophy. They identified 2 different homozygous variants in SLC66A1 in 3 individuals from 2 families with adult-onset retinal dystrophy. No functional data. Olinger et al. (2024)(https://www.sciencedirect.com/science/article/pii/S2949774424009804) - CNV analysis of trio and non-trio WGS data from Genomics England 100K genomes project. They identified homozygous 21kb deletion spanning nearly entire SLC66A1 gene in 2 siblings with adult-onset rod-cone dystrophy (parents HTZ carriers). Review of cohort data then identified homozygous LOF variants (1 nonsense, 2 frameshift) in another 3 individuals with rod-cone dystrophy. Sources: Literature |
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| Mendeliome v1.1363 | MDM4 |
Bryony Thompson gene: MDM4 was added gene: MDM4 was added to Mendeliome. Sources: Other Mode of inheritance for gene: MDM4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MDM4 were set to 32300648; 33104793 Phenotypes for gene: MDM4 were set to bone marrow failure syndrome MONDO:0000159, MDM4-related Review for gene: MDM4 was set to AMBER Added comment: A single family was reported to segregate a missense variant (p.Thr454Met) with features suggestive of dyskeratosis congenita, e.g., bone marrow hypocellularity, short telomeres, tongue squamous cell carcinoma, and acute myeloid leukemia. A mouse model of p.Thr454Met showed increased p53 activity, decreased telomere length, and bone marrow failure. Sources: Other |
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| Mendeliome v1.1338 | SGSM3 |
Dean Phelan gene: SGSM3 was added gene: SGSM3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SGSM3 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SGSM3 were set to PMID: 37833060 Phenotypes for gene: SGSM3 were set to Neurodevelopmental disorder (MONDO:0700092), SGSM3-related Review for gene: SGSM3 was set to AMBER Added comment: PMID: 37833060 - 13 patients from 8 families of Ashkenazi Jewish origin all had the same homozygous frameshift variant (c.981dup). Predicted to cause NMD. The variant co-segregated with disease in all available family members. The affected individuals displayed mild global developmental delay and mild to moderate intellectual disability. Additional prevalent phenotypes observed included hypotonia, behavioural challenges and short stature. Considered a founder variant (1 in 52 Ashkenazi Jews carry the variant). Also present in other populations but no homozygotes in gnomAD. Sources: Literature |
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| Mendeliome v1.1169 | TRAC | Zornitza Stark Tag technically challenging tag was added to gene: TRAC. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1001 | DCAF15 |
Chirag Patel gene: DCAF15 was added gene: DCAF15 was added to Mendeliome. Sources: Other Mode of inheritance for gene: DCAF15 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: DCAF15 were set to Cornelia de Lange syndrome Review for gene: DCAF15 was set to AMBER Added comment: ESHG 2023: 3 unrelated cases with CdLS (1 x TOP with MCA, 1 x death @20mths, 1 x living child) Features suggestive of CdLS - DD, microcephaly, CHD, dysmorphism, visual/hearing impairment. WES identified recurrent de novo variant (p.Ser470Phe) in DCAF15 gene. This mediates ubiquitination and degradation of target proteins, and interacts with cohesin complex members (SMC1/SMC3). Protein analysis from individuals showed increased accumulation of ubiquitination-modified proteins and SM3 (GOF mechanism). EpiSign analysis showed same DNA methylation pattern as other CdLS cases/genes. Zebrafish model showed reduced body length, reduced head size, reduced oligodendrocytes, heart defect, aberrant motor neurons, and abnormal response to visual/auditory stimuli. Sources: Other |
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| Mendeliome v1.967 | ZNF808 | Krithika Murali Added comment: Comment on list classification: Green in Genomics England PanelApp neonatal diabetes panel with both of these papers cited in their review. Note that De Franco et al has not been peer-reviewed, however, the evidence provided is strong and from a reputable source. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v1.896 | CHRM5 |
Elena Savva gene: CHRM5 was added gene: CHRM5 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CHRM5 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CHRM5 were set to 37213061 Phenotypes for gene: CHRM5 were set to Congenital anomaly of kidney and urinary tract, (MONDO:0019719), CHRM5-related Review for gene: CHRM5 was set to RED Added comment: PMID: 37213061 - homozygous missense p.(Q184R) in a proband with neurogenic bladder and CAKUT. Additional features were small trabeculated urinary bladder, bilateral severe hydronephrosis, grade V VUR right, chronic kidney disease (stage 4). - Radioligand binding experiments were inconclusive - the missense variant had no effect on receptor expression or binding affinity. - ACh binding assay did show a 2-fold increase (borderline significant), but no effect in secondary messenger accumulation. - Transfected CHO line showed no effect on receptor expression - Described a mouse K/O as having a bladder overactivity No hom PTCs in gnomAD Sources: Literature |
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| Mendeliome v1.848 | NAF1 |
Bryony Thompson gene: NAF1 was added gene: NAF1 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: NAF1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: NAF1 were set to 27510903 Phenotypes for gene: NAF1 were set to Pulmonary fibrosis and/or bone marrow failure, telomere-related MONDO:0000148 Review for gene: NAF1 was set to GREEN Added comment: At least 3 probands/families with telomere-related pulmonary fibrosis and a supporting mouse model PMID: 27510903 - 5 individuals from 2 unrelated families with pulmonary fibrosis-emphysema and extrapulmonary manifestations including myelodysplastic syndrome and liver disease, with LoF variants. Truncated NAF1 was detected in cells derived from patients, and, in cells in which a frameshift mutation was introduced by genome editing telomerase RNA levels were reduced. Shortened telomere length also segregated with the variants. A Naf1+/- mouse model had reduced telomerase RNA levels ClinVar - 1 nonsense and 2 splice site variants (ID: 2443185, 1338525, 2443184) called LP by the Genetic Services Laboratory, University of Chicago but no clinical details were provided - SCV002547372.1 - Garcia Pulmonary Genetics Research Laboratory, Columbia University Irving Medical Center - at least one individual with pulmonary fibrosis and leukocyte telomere length (by qPCR) less than 10th percentile age-adjusted Sources: Expert list |
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| Mendeliome v1.847 | PMEPA1 |
Hazel Phillimore changed review comment from: PMID: 36928819; Greene, D. et al. (2023) Nat Med. 29(3):679-688. A paper by Genomics England Research Consortium. Genetic association analysis of 77,539 genomes . Eight families with truncating variants affecting the same stretch of cytosines in this gene. In the 100KGP discovery cohort, in three families with Familial thoracic aortic aneurysm disease (FTAAD) of European ancestry, the variant found was an insertion of a cytosine within a seven-cytosine stretch in the last exon, predicted to cause p.(S209Qfs*3). This variant was also identified independently in eight affected members of three pedigrees of Japanese ancestry in a separate Japanese patient group. Also, this study found a deletion of one of those cytosines causing p.(S209Afs*61), in one individual or family. Also, there was one family in Belgium in which the affected members carried a 5-bp deletion in the same stretch of polycytosines inducing a frameshift p.(P207Qfs*3). Phenotypic analysis of the individuals suggest that the phenotype of these FTAAD individuals and families is more like Loeys-Dietz syndrome. Sources: Literature; to: PMID: 36928819; Greene, D. et al. (2023) Nat Med. 29(3):679-688. A paper by Genomics England Research Consortium. Genetic association analysis of 77,539 genomes . Eight families with truncating variants affecting the same stretch of cytosines in this gene. In the 100KGP discovery cohort, in three families with Familial thoracic aortic aneurysm disease (FTAAD) of European ancestry, the variant found was an insertion of a cytosine within a seven-cytosine stretch in the last exon, predicted to cause p.(S209Qfs*3). This variant was also identified independently in eight affected members of three pedigrees of Japanese ancestry in a separate Japanese patient group. (Note: the variant is present in gnomAD v2.1.1 in 22 heterozygotes as a filtered out variant.). Also, this study found a deletion of one of those cytosines causing p.(S209Afs*61), in one individual or family. Also, there was one family in Belgium in which the affected members carried a 5-bp deletion in the same stretch of polycytosines inducing a frameshift p.(P207Qfs*3). Phenotypic analysis of the individuals suggest that the phenotype of these FTAAD individuals and families is more like Loeys-Dietz syndrome. Sources: Literature |
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| Mendeliome v1.841 | PMEPA1 |
Hazel Phillimore gene: PMEPA1 was added gene: PMEPA1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PMEPA1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PMEPA1 were set to PMID: 36928819 Phenotypes for gene: PMEPA1 were set to Familial thoracic aortic aneurysm disease (FTAAD); Loeys-Dietz syndrome Mode of pathogenicity for gene: PMEPA1 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: PMEPA1 was set to AMBER Added comment: PMID: 36928819; Greene, D. et al. (2023) Nat Med. 29(3):679-688. A paper by Genomics England Research Consortium. Genetic association analysis of 77,539 genomes . Eight families with truncating variants affecting the same stretch of cytosines in this gene. In the 100KGP discovery cohort, in three families with Familial thoracic aortic aneurysm disease (FTAAD) of European ancestry, the variant found was an insertion of a cytosine within a seven-cytosine stretch in the last exon, predicted to cause p.(S209Qfs*3). This variant was also identified independently in eight affected members of three pedigrees of Japanese ancestry in a separate Japanese patient group. Also, this study found a deletion of one of those cytosines causing p.(S209Afs*61), in one individual or family. Also, there was one family in Belgium in which the affected members carried a 5-bp deletion in the same stretch of polycytosines inducing a frameshift p.(P207Qfs*3). Phenotypic analysis of the individuals suggest that the phenotype of these FTAAD individuals and families is more like Loeys-Dietz syndrome. Sources: Literature |
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| Mendeliome v1.601 | TRPC5 |
Hazel Phillimore gene: TRPC5 was added gene: TRPC5 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TRPC5 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: TRPC5 were set to PMID: 36323681; 24817631; 23033978; 33504798; 28191890 Phenotypes for gene: TRPC5 were set to Intellectual disability; autistic spectrum disorder Review for gene: TRPC5 was set to AMBER Added comment: PMID: 36323681; Leitão E. et al. (2022) Nat Commun.13(1):6570: Missense variant NM_012471.2:c.523C>T, p.(Arg175Cys in three brothers with intellectual disability (ID) and autistic spectrum disorder (ASD), inherited from an asymptomatic mother and absent in the maternal grandparents. Whole cell patch clamp studies of HEK293 created by site-directed mutagenesis showed increased current of this calcium channel (constitutively opened). (This variant is absent in gnomAD v2.1.1). Also, the nonsense variant, c.965G> A, p.(Trp322*) was found in a high functioning ASD male (maternally inherited), NMD-predicted. Other papers and TRPC5 variants that were cited to associate this gene with X-linked ID and/or ASD include: PMID: 24817631; Mignon-Ravix, C. et al. (2014) Am. J.Med. Genet. A 164A: 1991–1997: A hemizygous 47-kb deletion in Xq23 including exon 1 of the TRPC5 gene. He had macrocephaly, delayed psychomotor development, speech delay, behavioural problems, and autistic features. Maternally inherited, and a family history compatible with X-linked inheritance (i.e., maternal great uncle was also affected, although not tested). In addition, PMID: 36323681; Leitão E. et al. (2022) cites papers with the variants p.(Pro667Thr), p.(Arg71Gln) and p.(Trp225*). NB. p.(Pro667Thr) is absent in gnomAD (v2.1.1), p.(Arg71Gln) is also absent (the alternative variant p.(Arg71Trp) is present once as heterozygous only). p.(Trp225*) is absent, and it should be noted that PTCs / LoF variants are very rare (pLI = 1). However, looking further into the three references, the evidence is not as clear or as accurate as was stated. The missense variant c.1999C>A, p.(Pro667Thr), was stated as de novo, but was actually maternally inherited but was still considered a candidate for severe intellectual disability (shown in the Appendix, Patient 93, with severe speech delay, autism spectrum disorder and Gilles de la Tourette). This patient also has a de novo MTF1 variant. Reference: PMID: 23033978; de Ligt, J. et al. (2012) N. Engl. J. Med. 367: 1921–1929). Missense variant (de novo): c.212G>A, p.(Arg71Gln), was found as part of the Deciphering Developmental Disorders (DDD) study and is shown in individual 164 in Supplementary Table 2 of PMID: 33504798; Martin, HC. et al. (2021) Nat. Commun.12: 627. Also displayed in DECIPHER (DDD research variant) with several phenotype traits, but ID and ASD are not specifically mentioned. Nonsense variant: c.674G>A. p.(Trp225*) was stated as de novo but was inherited (reference PMID: 28191890; Kosmicki, JA. et al. (2017) Nat. Genet. 49: 504–510. Supplement Table 7). This was a study of severe intellectual delay, developmental delay / autism. (NB. The de novo p.(Arg71Gln) variant from the DDD study is also listed (subject DDD 342 in Supplement 4 / Table 2). Sources: Literature |
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| 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 v1.534 | NLGN4X | Zornitza Stark Added comment: Comment when marking as ready: Definitive assessment by ClinGen noted, as well as 'limited' assessments by G2P and Genomics England. Many of the variants are multi-gene deletions; phenotypes are not well delineated, with several individuals not having ID. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.291 | GATA1 | Zornitza Stark edited their review of gene: GATA1: Added comment: PMID 36029112: De novo GATA1 initiation codon variant (c.3G>A) identified in a Diamond-Blackfan Anaemia patient. Functional evidence showed that the variant does not affect the GATA1 mRNA but brings about a shorter GATA1 isoform (GATA1s) and reduced full-length functional GATA1 protein (GATA1fl), thereby contributing to an erythropoietic defect. Four other GATA1 variants (c.2T>C, c.220G>C, c.220delG, c.220+2T>C) found in eight families have been described as DBA phenotype.; Changed publications: 36029112; Changed phenotypes: Thrombocytopaenia, X-linked, with or without dyserythropoietic anaemia, MIM# 300367, Haemolytic anaemia due to elevated adenosine deaminase, MIM# 301083, Anemia, X-linked, with/without neutropenia and/or platelet abnormalities, MIM# 300835, Diamond-Blackfan anemia (MONDO:0015253) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.217 | WARS | Seb Lunke Phenotypes for gene: WARS were changed from Neuronopathy, distal hereditary motor, type IX (OMIM:617721); juvenile to adult onset (15-23 years); distal wasting; distal weakness; length-dependent motor axonal degeneration to Neuronopathy, distal hereditary motor, type IX (OMIM:617721); juvenile to adult onset (15-23 years); Neurodevelopmental disorder (MONDO:0700092), WARS-related | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.44 | BUB1 |
Paul De Fazio gene: BUB1 was added gene: BUB1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: BUB1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: BUB1 were set to 35044816; 19772675; 19117986; 23209306 Phenotypes for gene: BUB1 were set to Intellectual disability and microcephaly Review for gene: BUB1 was set to GREEN gene: BUB1 was marked as current diagnostic Added comment: 2 unrelated patients with ID, microcephaly, short stature, dysmorphic features reported with biallelic variants: P1 (3yo male): homozygous start-loss variant (2 hets and 0 hom in gnomAD). Functional testing showed a small amount of full-length protein was translated, and BUB1 recruitment to kinetochores was nearly undetectable. P2 (16yo female): compound heterozygous for a canonical splice variant (1 het and no hom in gnomAD) and an NMD-predicted frameshift variant (absent from gnomAD). The splice variant was shown to result in an in-frame deletion of 54 amino acids in the kinase domain. P2 cells have reduced protein levels but essentially no kinase activity. BUB1 patient cells have impaired mitotic fidelity. Homozygous Bub1 disruption in mice is embryonic lethal (PMID:19772675). A hypomorphic mouse is viable with increased tumourigenesis with ageing and aneuploidy (PMID:19117986). A kinase-dead mouse does not show increased tumourigenesis but does have a high frequency of aneuploid cells (PMID:23209306) Sources: Literature |
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| Mendeliome v0.14232 | MYOCD |
Zornitza Stark changed review comment from: Congenital megabladder (MGBL) is characterized by a massively dilated bladder with disrupted smooth muscle in the bladder wall. MGBL is a sex-limited trait with 95% male predominance, likely the result of differences in urethra and bladder development and length differences in urethra between males and females. Seven affected males from three families. Five females and one male with the variant were unaffected, suggesting incomplete penetrance. Additional family in PMID 35005812 as part of a large prenatal renal cohort.; to: Congenital megabladder (MGBL) is characterized by a massively dilated bladder with disrupted smooth muscle in the bladder wall. MGBL is a sex-limited trait with 95% male predominance, likely the result of differences in urethra and bladder development and length differences in urethra between males and females. Seven affected males from three families. Five females and one male with the variant were unaffected, suggesting incomplete penetrance. Additional family in PMID 35005812 as part of a large prenatal renal cohort. Mono allelic disease in males (megabladder), bi-allelic disease in males and females (megabladder and congenital heart disease). Mouse models. |
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| Mendeliome v0.13919 | CYP2C19 |
Ain Roesley changed review comment from: Voriconazole: Improved time to target concentration with genotype directed dosing (PMID 26616742), reduced underexposure (PMID: 31549389) (PMID 31549386) (PMID:27981572) Voriconazole, moderate strength. Poor metabolizer: "Higher dose-adjusted trough concentrations of voriconazole and may increase probability of adverse events." Ultrarapid metabolizer: "probability of attainment of therapeutic voriconazole concentrations is small with standard dosing."; to: Pharmacogenomics gene Voriconazole: Improved time to target concentration with genotype directed dosing (PMID 26616742), reduced underexposure (PMID: 31549389) (PMID 31549386) (PMID:27981572) Voriconazole, moderate strength. Poor metabolizer: "Higher dose-adjusted trough concentrations of voriconazole and may increase probability of adverse events." Ultrarapid metabolizer: "probability of attainment of therapeutic voriconazole concentrations is small with standard dosing." |
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| Mendeliome v0.13637 | HK1 |
Zornitza Stark changed review comment from: HMSNR is an autosomal recessive progressive complex peripheral neuropathy characterized by onset in the first decade of distal lower limb weakness and muscle atrophy resulting in walking difficulties. Distal impairment of the upper limbs usually occurs later, as does proximal lower limb weakness. There is distal sensory impairment, with pes cavus and areflexia. Laboratory studies suggest that it is a myelinopathy resulting in reduced nerve conduction velocities in the demyelinating range as well as a length-dependent axonopathy. Founder variant in the Roma, -3818-195G-C, AltT2 EXON in 5'UTR identified in multiple families. Note gene is associated with other phenotypes.; to: Bi-allelic variants and neuropathy: HMSNR is an autosomal recessive progressive complex peripheral neuropathy characterized by onset in the first decade of distal lower limb weakness and muscle atrophy resulting in walking difficulties. Distal impairment of the upper limbs usually occurs later, as does proximal lower limb weakness. There is distal sensory impairment, with pes cavus and areflexia. Laboratory studies suggest that it is a myelinopathy resulting in reduced nerve conduction velocities in the demyelinating range as well as a length-dependent axonopathy. Founder variant in the Roma, -3818-195G-C, AltT2 EXON in 5'UTR identified in multiple families. Note gene is associated with other phenotypes. |
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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 v0.12844 | CD209 | Ain Roesley Phenotypes for gene: CD209 were changed from to {Dengue fever, protection against} MIM#614371; {HIV type 1, susceptibility to} MIM#609423; {Mycobacterium tuberculosis, susceptibility to} MIM#607948 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12843 | CD209 | Ain Roesley reviewed gene: CD209: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: {Dengue fever, protection against} MIM#614371, {HIV type 1, susceptibility to} MIM#609423, {Mycobacterium tuberculosis, susceptibility to} MIM#607948; Mode of inheritance: None; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12720 | FUZ | Anna Ritchie changed review comment from: Novel missense p.(Arg284Pro) mutation in FUZ identified in twins presenting with craniosynostosis. Loss of Fuz resulted in increased mineralisation in both in vitro embryonic primary osteoblast cultures and in fibroblasts undergoing an osteogenic challenge. No previous reports have implicated changes in human FUZ in craniosynostosis. However, variations in FUZ have been found in patients with neural tube defects.; to: Novel missense p.(Arg284Pro) mutation in FUZ identified in twins presenting with craniosynostosis. Loss of Fuz resulted in increased mineralisation in both in vitro embryonic primary osteoblast cultures and in fibroblasts undergoing an osteogenic challenge. No previous reports have implicated changes in human FUZ in craniosynostosis. However, variations in FUZ have been found in patients with neural tube defects. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12714 | AHSG |
Elena Savva gene: AHSG was added gene: AHSG was added to Mendeliome. Sources: Literature Mode of inheritance for gene: AHSG was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: AHSG were set to PMID: 28054173; 9395485; 31288248; 17389622 Phenotypes for gene: AHSG were set to ?Alopecia-intellectual disability syndrome 1 MIM#203650; infantile cortical hyperostosis Review for gene: AHSG was set to RED Added comment: PMID: 28054173 - 7 relatives within a large consanguinous fam w/ alopecia and ID, and a hom missense (p.Arg317His). Modelling predicts this variant to be a phosphorylation site, functional studies show a difference in protein size. Unclear biological significance. Alt change with stronger GS (p.(Arg317Cys)) is a common poly with 19 homozygotes in gnomAD. No hom PTCs in gnomAD PMID: 9395485 - K/O mouse model shows no gross anatomical abnormalities, were fertile and "healthy". No mentioned of ID, alopecia PMID: 17389622 - K/O mouse model on the calcification resistant genetic background C57BL/6, shows uraemia and phosphate challenge. No mentioned of ID, alopecia PMID: 31288248 - 1 hom infant (p.K2*, within 5' NMD escape region) with infantile cortical hyperostosis, loss of enzyme in patient serum shown by ELISA. No mentioned of ID, alopecia Sources: Literature |
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| Mendeliome v0.12407 | ENG | Bryony Thompson Marked gene: ENG as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12407 | ENG | Bryony Thompson Gene: eng has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12407 | ENG | Bryony Thompson Phenotypes for gene: ENG were changed from to hereditary hemorrhagic telangiectasia MONDO:0019180 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12406 | ENG | Bryony Thompson Publications for gene: ENG were set to | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12405 | ENG | Bryony Thompson Mode of inheritance for gene: ENG was changed from Unknown to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12404 | ENG | Bryony Thompson reviewed gene: ENG: Rating: GREEN; Mode of pathogenicity: None; Publications: 34012068, 30336550, 7894484, 10751092, 20414677, 30763665, 17384219, 20364125; Phenotypes: hereditary hemorrhagic telangiectasia MONDO:0019180; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12326 | AGK | Zornitza Stark Phenotypes for gene: AGK were changed from to Sengers syndrome, MIM#212350; Cataract 38 MIM#614691 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12282 | AGK | Elena Savva reviewed gene: AGK: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 22415731, 25208612; Phenotypes: Sengers syndrome, MIM#212350, Cataract 38 MIM#614691; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12189 | TGFB1 | Zornitza Stark Phenotypes for gene: TGFB1 were changed from to Inflammatory bowel disease, immunodeficiency, and encephalopathy MIM# 618213; Camurati-Engelmann disease, MIM# 131300 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12186 | TGFB1 | Zornitza Stark reviewed gene: TGFB1: Rating: GREEN; Mode of pathogenicity: None; Publications: 29483653, 10973241, 35315241, 30721323; Phenotypes: Inflammatory bowel disease, immunodeficiency, and encephalopathy MIM# 618213, Camurati-Engelmann disease, MIM# 131300; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12152 | CASP8 |
Ain Roesley changed review comment from: Boderline red/amber 1 family (the 2nd family reported in PMID:25814141 was found to be distantly related to the one in PMID:12353035) Mice with targeted T cell and B cell caspase-8 deficiency present normal thymocyte development but a marked decrease in peripheral blood T-cells. Besides, when challenged with the lymphocytic choriomeningitis virus (LCMV), these animals showed a significantly impaired immune response to the infection that included impaired CD8 cell expansion and an abrogated ability to generate virus-specific CD8+ cytotoxic T-cells.; to: Borderline red/amber 1 family (the 2nd family reported in PMID:25814141 was found to be distantly related to the one in PMID:12353035) Mice with targeted T cell and B cell caspase-8 deficiency present normal thymocyte development but a marked decrease in peripheral blood T-cells. Besides, when challenged with the lymphocytic choriomeningitis virus (LCMV), these animals showed a significantly impaired immune response to the infection that included impaired CD8 cell expansion and an abrogated ability to generate virus-specific CD8+ cytotoxic T-cells. |
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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 v0.11103 | HIST1H4D |
Paul De Fazio gene: HIST1H4D was added gene: HIST1H4D was added to Mendeliome. Sources: Literature Mode of inheritance for gene: HIST1H4D was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: HIST1H4D were set to 35202563 Phenotypes for gene: HIST1H4D were set to Neurodevelopmental disorder, HIST1H4D-related MONDO:0700092 Review for gene: HIST1H4D was set to AMBER gene: HIST1H4D was marked as current diagnostic Added comment: Single individual described with a de novo missense variant Arg41His (Arg40 in H4 nomenclature). Apart from language delay and moderate ID, phenotypes included facial dysmorphisms and cochlear abnormalities and arhinencephaly on MRI. Hearing was normal. Birth length, OFC, weight were all reduced (-2 to -2.5SD). A zebrafish model has developmental defects. Sources: Literature |
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| Mendeliome v0.10542 | TBX2 |
Krithika Murali changed review comment from: Liu et al. (2018) reported 4 affected individuals from 2 unrelated families with congenital cardiac defects (ASD, PDA, double outlet right ventricle, pulmonary stenosis), skeletal abnormalities (camptodactyly, congenital fusion thoracic spine, hemivertebrae ).Thymus aplasia/hypoplasia, cleft palate also noted. Other associated features include - facial dysmorphisms, variable developmental delay, and endocrine system disorders (e.g. autoimmune hypothyroidism, hypoparathyroidism). PMID23727221 and PMID30223900 - TBX2 gene and TBX2 gene promoter sequencing in congenital heart disease cohorts versus controls - not enough supportive evidence for variant pathogenicity, including no segregation data. Variants prevalent in population databases also included as likely pathogenic. PMID 20635360 - de novo dup 17q23.2 encompassing TBX2 gene in boy with cognitive impairment, multiple congenital defects and prenatal onset growth restriction. Part of BCAS3 gene (associated with autosomal recessive Hengel-Maroofian-Schols syndrome) also included in duplication. No supportive evidence of TBX2 gene function impairment in the patient provided.; to: Liu et al. (2018) reported 4 affected individuals from 2 unrelated families with congenital cardiac defects (ASD, PDA, double outlet right ventricle, pulmonary stenosis), skeletal abnormalities (camptodactyly, congenital fusion thoracic spine, hemivertebrae ).Thymus aplasia/hypoplasia, cleft palate also noted. Other associated features include - facial dysmorphisms, variable developmental delay, and endocrine system disorders (e.g. autoimmune hypothyroidism, hypoparathyroidism). PMID23727221 and PMID30223900 - TBX2 gene and TBX2 gene promoter sequencing in congenital heart disease cohorts versus controls - not enough supportive evidence for variant pathogenicity, including no segregation data. Variants prevalent in population databases also included as potentially disease causing. PMID 20635360 - de novo dup 17q23.2 encompassing TBX2 gene in boy with cognitive impairment, multiple congenital defects and prenatal onset growth restriction. Part of BCAS3 gene (associated with autosomal recessive Hengel-Maroofian-Schols syndrome) also included in duplication. No supportive evidence of TBX2 gene function impairment in the patient provided. |
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| Mendeliome v0.10106 | BCAS3 | Zornitza Stark Phenotypes for gene: BCAS3 were changed from Syndromic neurodevelopmental disorder to Hengel-Maroofian-Schols syndrome, MIM# 619641 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10105 | BCAS3 | Zornitza Stark reviewed gene: BCAS3: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Hengel-Maroofian-Schols syndrome, MIM# 619641; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9347 | USP48 |
Eleanor Williams gene: USP48 was added gene: USP48 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: USP48 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: USP48 were set to 34059922 Phenotypes for gene: USP48 were set to non-syndromic hearing loss; nonsyndromic genetic deafness, MONDO:0019497 Penetrance for gene: USP48 were set to Incomplete Review for gene: USP48 was set to GREEN Added comment: PMID: 34059922 - Bassani et al 2021 - 3 cases reported with variants in USP48 and non syndromic hearing loss. They first analysed 4-generation Italian family with 6 individuals with hearing loss. The only rare variant segregating with the disease was a missense variant in USP48 (NM_032234.7:c.1216G > A, NP_115612.4:p.(Gly406Arg)). The variant is present in GnomAD v2.1.1 with a minor allele frequency (MAF) of 6.7 × 10−5 (17 allele out of 251 304 with no homozygotes). They also observed one hearing individual in the family who was heterozygous for the variant, suggesting incomplete penetrance. In a Dutch family the found by exome sequencing a missense variant in USP48 (NM_032236.7:c.2215_2216delinsTT, NP_115612.4:p.(Thr739Leu)). The probands mother and uncle were also affected by no sequence data was available for analysis. In a French family a proband is reported with right profound sensorineural hearing impairment (at 12 months), but normal left hearing (at 6 years old). The patient is heterozygote for a de novo splice variant in USP48 (NM_032236.7:c.3058 + 2 T > C, NP_115612.4:p.?;) which is not found in GnomAD and is predicted to result in a frameshift resulting in either NMD or a truncated protein. In functional experiments they showed that the two missense variants found in the Italian and Dutch families, and a shortened protein as predicted for the variant found in the French variant, showed an impaired ability to cleave tetra-ubiquitin into tri-, di- and mono-ubiquitin. Using immunohistology, they show that the human USP48 protein is present in fetal inner ear specimens. In addition zebrafish lacking usp48 showed a significant decrease of auditory response in acoustic startle response assays at 600 and 800 Hz wavelengths. Sources: Literature |
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| 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 v0.8990 | OPDM2 |
Bryony Thompson STR: OPDM2 was added STR: OPDM2 was added to Mendeliome. Sources: Literature Mode of inheritance for STR: OPDM2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: OPDM2 were set to 32413282; 33374016 Phenotypes for STR: OPDM2 were set to Oculopharyngodistal myopathy 2 MIM#618940 Review for STR: OPDM2 was set to GREEN STR: OPDM2 was marked as clinically relevant Added comment: NM_005716.4:c.-211GGC[X] >15 Chinese families/probands with a heterozygous trinucleotide repeat expansion (CGG(n)) in 5'UTR exon 1 of the GIPC1 gene. The expansion was found by a combination of linkage analysis, whole-exome sequencing, long-range sequencing, and PCR analysis, and segregated with the disorder in the family. Repeat lengths in the patients ranged from 70 to 138. Normal repeat lengths ranged from 12 to 32. Sources: Literature |
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| Mendeliome v0.8606 | VRK1 |
Zornitza Stark changed review comment from: Complex phenotype with mixed peripheral and central neurological features. Two families reported where PCH was prominent and accompanied by ataxia. At least three families also reported where peripheral neuropathy dominated the clinical picture without PCH/ataxia.; to: Complex phenotype with mixed peripheral and central neurological features. Two families reported where PCH was prominent and accompanied by ataxia. At least three families also reported where peripheral neuropathy dominated the clinical picture without PCH/ataxia. Further delineation of phenotype 2021: PMID 34169149: expanding spectrum of neurologic disorders associated with VRK1. Two Hispanic individuals, one homozygous (R321C: VUS and LP/P in ClinVar) and one cHet (R321C+V236M, latter P and more recently VUS in ClinVar), with slowly progressive weakness and a clinical syndrome consistent with adult-onset spinal muscular atrophy WITHOUT pontocerebellar atrophy. No hom in gnomAD and both have been reported in cHet individuals with other features: R321C in association with adult-onset amyotrophic lateral sclerosis and V236M with rapidly progressive sensorimotor polyneuropathy and microcephaly. Authors suggest PMID 26583493 and 31837156 have similar reports. PMID 26583493 reports a 32yo Hispanic individual, cHet H119R+R321C, with early-onset amyotrophic lateral sclerosis, 5 years progressive weakness. PMID 31837156 reports two patients with adult-onset length-dependent motor neuropathy from unrelated consanguineous families of Moroccan Jewish descent, both hom for R387H. |
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| Mendeliome v0.8511 | CAMK4 |
Zornitza Stark gene: CAMK4 was added gene: CAMK4 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: CAMK4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CAMK4 were set to 30262571; 33098801; 33211350 Phenotypes for gene: CAMK4 were set to Intellectual disability; Autism; Behavioral abnormality; Abnormality of movement; Dystonia; Ataxia; Chorea; Myoclonus Review for gene: CAMK4 was set to GREEN Added comment: 3 publications by Zech et al (2018, 2020 - PMIDs : 30262571, 33098801, 33211350) provide clinical details on 3 individuals, each harboring a private de novo CAMK4 variant. Overlapping features included DD, ID, behavoral issues, autism and abnormal hyperkinetic movements. Dystonia and chorea in all 3 appeared 3-20 years after initial symptoms. CAMK4 encodes Calcium/Calmodulin-dependent protein kinase IV, an important mediator of calcium-mediated activity and dynamics, particularly in the brain. It is involved in neuronal transmission, synaptic plasticity, and neuronal gene expression required for brain development and neuronal homeostasis (summary by OMIM based on Zech et al, 2018). The 473 aa enzyme has a protein kinase domain (aa 46-300) and a C-terminal autoregulatory domain (aa 305-341) the latter comprising an autoinhibitory domain (AID / aa 305-321) and a calmodulin-binding domain (CBD / aa 322-341) [NP_001735.1 / NM_001744.4 - also used below]. Variants in all 3 subjects were identified following trio-WES and were in all cases protein-truncating, mapping to exon 10 or exon 10-intron 10 junction, expected to escape NMD and cause selective abrogation of the autoinhibitory domain (aa 305-321) leading overall to gain-of-function. Variation databases include pLoF CAMK4 variants albeit in all cases usptream or downstream of this region (pLI of this gene in gnomAD: 0.51). Variants leading to selective abrogation of the autoregulatory domain have not been reported. Extensive evidence for the GoF effect of the variant has been provided in the first publication. Several previous studies have demonstrated that abrogation of the AID domain leads to consitutive activation (details below). Mouse models - though corresponding to homozygous loss of function - support a role for CAMKIV in cognitive and motor symptoms. Null mice display tremulous and ataxic movements, deficiencies in balance and sensorimotor performance associated with reduced number of Purkinje neurons (Ribar et al 2000, PMID: 11069976 - not reviewed). Wei et al (2002, PMID: 12006982 - not reviewed) provided evidence for alteration in hippocampal physiology and memory function. Heterozygous mutations in other genes for calcium/calmodulin-dependent protein kinases (CAMKs) e.g. CAMK2A/CAMK2B (encoding subunits of CAMKII) have been reported in individuals with ID. --- The proband in the first publication (PMID: 30262571) was a male with DD, ID, behavioral difficulties (ASD, autoaggression, stereotypies) and hyperkinetic movement disorder (myoclonus, chorea, ataxia) with severe generalized dystonia (onset at the age of 13y). Brain MRI demonstrated cerebellar atrophy. Extensive work-up incl. karyotyping, CMA, DYT-TOR1A, THAP1, GCH1, SCA1/2/3/6/7/8/12/17, Friedreich's ataxia and FMR1 analysis was negative.F Trio WES identified a dn splice site variant (c.981+1G>A) in the last exon-intron junction. RT-PCR followed by gel electrophoresis and Sanger in fibroblasts from an affected and control subject revealed that the proband had - as predicted by the type/location of the variant - in equal amount 2 cDNA products, a normal as well as a truncated one. Sequencing of the shortest revealed utilization of a cryptic donor splice site upstream of the mutated donor leading to a 77bp out-of-frame deletion and introduction of a premature stop codon in the last codon (p.Lys303Serfs*28). Western blot in fibroblast cell lines revealed 2 bands corresponding to the normal protein product as well as to the p.Lys303Serfs*28 although expression of the latter was lower than that of the full length protein. Several previous studies have shown that mutant CAMKIV species that lack the autoinhibitory domain are consitutively active (several Refs provided). Among others Chatila et al (1996, PMID: 8702940) studied an in vitro-engineered truncation mutant (Δ1-317 - truncation at position 317 of the protein) with functionally validated gain-of-function effect. To prove enhanced activity of the splicing variant, Zech et al assessed phosphorylation of CREB (cyclic AMP-responsive element binding protein), a downstream substrate of CAMKIV. Immunobloting revealed significant increase of CREB phosphorylation in patient fibroblasts compared to controls. Overactivation of CAMKIV signaling was reversed when cells were treated with STO-609 an inhibitor of CAMKK, the ustream activator of CAMKIV. Overall the authors demonstrated that loss of CAMKIV autoregulatory domain due to this splice variant had a gain-of-function effect. ---- Following trio-WES, Zech et al (2020 - PMID: 33098801) identified another relevant subject within cohort of 764 individuals with dystonia. This 12-y.o. male, harboring a different variant affecting the same donor site (c.981+1G>T), presented DD, ID, dystonia (onset at 3y) and additional movement disorders (myoclonus, ataxia) as well as similar behavior (ASD, autoaggression, stereotypies). [Details in suppl. p20]. ---- Finally Zech et al (2020 - PMID: 33211350) reported on a 24-y.o. woman with adolescence onset choreodystonia. Other features included DD, moderate ID, absence seizures in infancy, OCD with anxiety and later diagnosis of ASD. Trio WES revealed a dn stopgain variant (c.940C>T; p.Gln314*). Sources: Expert Review |
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| Mendeliome v0.6311 | SCARB1 | Bryony Thompson Phenotypes for gene: SCARB1 were changed from to High density lipoprotein cholesterol level QTL6 MIM#610762; Scavenger receptor class B type I deficiency; Inherited hypolipidaemias | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6307 | SCARB1 | Bryony Thompson reviewed gene: SCARB1: Rating: ; Mode of pathogenicity: None; Publications: 21226579, 30720493, 21480869, 26965621, 27604308; Phenotypes: High density lipoprotein cholesterol level QTL6 MIM#610762, Scavenger receptor class B type I deficiency, Inherited hypolipidaemias; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5605 | FRA12A |
Bryony Thompson STR: FRA12A was added STR: FRA12A was added to Mendeliome. Sources: Other 5'UTR tags were added to STR: FRA12A. Mode of inheritance for STR: FRA12A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: FRA12A were set to 17236128 Phenotypes for STR: FRA12A were set to Mental retardation, FRA12A type MIM#136630 Review for STR: FRA12A was set to AMBER Added comment: NM_173602.2:c.-137CGG[X] All individuals expressing FRA12A had CGG-repeat expansion. The length of the expanded allele in 3 unaffected FRA12A carriers was 650–850 bp. In the two affected patients from 2 families with FRA12A, the length of the expanded allele was ∼1,050-1,150 bp. 70 controls used to determine the "normal" repeat range. Sources: Other |
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| Mendeliome v0.5229 | PRKAR1B |
Konstantinos Varvagiannis gene: PRKAR1B was added gene: PRKAR1B was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PRKAR1B was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: PRKAR1B were set to https://doi.org/10.1101/2020.09.10.20190314; 25414040 Phenotypes for gene: PRKAR1B were set to Global developmental delay; Intellectual disability; Autism; Attention deficit hyperactivity disorder; Aggressive behavior; Abnormality of movement; Upslanted palpebral fissure Penetrance for gene: PRKAR1B were set to unknown Review for gene: PRKAR1B was set to AMBER Added comment: Please consider inclusion of this gene with amber rating pending publication of the preprint and/or additional evidence. Marbach et al. (2020 - medRxiv : https://doi.org/10.1101/2020.09.10.20190314 - last author : C. Schaaf) report 6 unrelated individuals with heterozygous missense PRKAR1B variants. All presented formal ASD diagnosis (6/6), global developmental delay (6/6) and intellectual disability (all - formal evaluations were lacking though). Additional features included neurologic anomalies (movement disorders : dyspraxia, apraxia, clumsiness in all, with tremor/dystonia or involuntary movements as single occurrences). Three displayed high pain tolerance. Regression in speech was a feature in two. Additional behavior anomalies included ADHD (4-5/6) or aggression (3/6). There was no consistent pattern of malformations, physical anomalies or facial features (with the exception of uplsanted palpebral fissures reported in 4). 3 different missense variants were identified (NM_00116470:c.1003C>T - p.Arg335Trp, c.586G>A - p.Glu196Lys, c.500_501delAAinsTT - p.Gln167Leu) with Arg355Trp being a recurrent one within this cohort (4/6 subjects). A possible splicing effect may apply for the MNV. All variants are absent from gnomAD and the SNVs had CADD scores > 24. In all cases were parental samples were available (5/6), the variant had occurred as a de novo event. Protein kinase A (PKA) is a tetrameric holoenzyme formed by the association of 2 catalytic (C) subunits with a regulatory (R) subunit dimer. Activation of PKA is achieved through binding of 2 cAMP molecules to each R-subunit, and unleashing(/dissociation) of C-subunits to engage substrates. PRKACA/B genes encode the Cα- and Cβ-subunits while the 4 functionally non-redundant regulatory subunits are encoded by PRKAR1A/1B/2A/2B genes. As the authors comment, the RIβ subunit is primarily expressed in brain with higher expression in cortex and hypothalamus. The functional consequences of the variants at cellular level were not studied. Previous studies have demonstrated that downregulation of RIβ in murine hippocampal cultures, reduced phosphorylation of CREB, a transcription factor involved in long-term memory formation. The authors speculate that a similar effect on cAMP/PKA/CREB cascade may mediate the cognitive effects in humans. RIβ deficient mice also display diminished nociceptive pain, similar to the human phenotype. [Several refs provided]. The authors cite the study by Kaplanis et al (2020 - PMID: 33057194), where in a large sample of 31,058 trio exomes of children with developmental disorders, PRKAR1B was among the genes with significant enrichment for de novo missense variants. [The gene has a pLI score of 0.18 in gnomAD / o/e = 0.26 - so pLoF variants may not be deleterious]. Please note that a specific PRKAR1B variant (NM_002735.2:c.149T>G - p.Leu50Arg) has been previous reported to segregate with a late-onset neurodegenerative disorder characterized by dementia and/or parkinsonism within a large pedigree with 12 affected individuals [Wong et al 2014 - PMID: 25414040]. Sources: Literature |
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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 v0.5085 | SYT2 |
Zornitza Stark changed review comment from: Mono-allelic disease, PMID 25192047: dominant missense variants in SYT2 reported as a rare cause of distal motor neuropathy and myasthenic syndrome, manifesting with stable or slowly progressive distal weakness of variable severity along with presynaptic NMJ impairment in two families. These variants are thought to have a dominant-negative effect on synaptic vesicle exocytosis, although the precise pathomechanism remains to be elucidated. Bi-allelic disease: 32250532 and 32776697, 8 individuals from 6 families, with biallelic loss of function variants in SYT2, clinically manifesting with severe congenital onset hypotonia and weakness, with variable degrees of respiratory involvement. Electrodiagnostic findings consistent with a presynaptic congenital myasthenic syndrome (CMS) in some. Treatment with an acetylcholinesterase inhibitor pursued in 4 indviduals showed clinical improvement with increased strength and function.; to: Mono-allelic disease, PMID 25192047 and 30533528: dominant missense variants in SYT2 reported as a rare cause of distal motor neuropathy and myasthenic syndrome, manifesting with stable or slowly progressive distal weakness of variable severity along with presynaptic NMJ impairment in three families. These variants are thought to have a dominant-negative effect on synaptic vesicle exocytosis, although the precise pathomechanism remains to be elucidated. Bi-allelic disease: 32250532 and 32776697, 8 individuals from 6 families, with biallelic loss of function variants in SYT2, clinically manifesting with severe congenital onset hypotonia and weakness, with variable degrees of respiratory involvement. Electrodiagnostic findings consistent with a presynaptic congenital myasthenic syndrome (CMS) in some. Treatment with an acetylcholinesterase inhibitor pursued in 4 indviduals showed clinical improvement with increased strength and function. |
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| Mendeliome v0.4091 | NOTCH3 |
Eleanor Williams gene: NOTCH3 was added gene: NOTCH3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: NOTCH3 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: NOTCH3 were set to 31960911 Phenotypes for gene: NOTCH3 were set to CADASIL Review for gene: NOTCH3 was set to AMBER Added comment: PMID: 31960911 - Gravesteijn et al 2020 - describe a family with a unique cysteine-altering NOTCH3 variant in exon 9 in 5 individuals, which is predicted to cause natural exon 9 skipping. This mimics the therapeutic NOTCH3 cysteine correction approach and allows the effect of cysteine corrective exon skipping on NOTCH3 protein aggregation and disease severity in humans to be studied. In this family the CADASIL phenotype was mild. Note this gene is rated green on the Neurodegenerative disorders - adult onset panel in the Genomics England instance of PanelApp https://panelapp.genomicsengland.co.uk/panels/474/gene/NOTCH3/ Sources: Literature |
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| Mendeliome v0.3590 | GNPNAT1 |
Arina Puzriakova changed review comment from: Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype. Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation. Sources: Literature; to: PMID: 32591345 (2020) - Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype. Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation. Additional cases required to validate pathogenicity of GNPNAT1. Sources: Literature |
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| Mendeliome v0.3590 | GNPNAT1 |
Arina Puzriakova gene: GNPNAT1 was added gene: GNPNAT1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: GNPNAT1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: GNPNAT1 were set to 32591345 Phenotypes for gene: GNPNAT1 were set to Rhizomelic skeletal dysplasia Review for gene: GNPNAT1 was set to RED Added comment: Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype. Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation. Sources: Literature |
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| Mendeliome v0.2932 | DNAH6 |
Elena Savva gene: DNAH6 was added gene: DNAH6 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DNAH6 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: DNAH6 were set to PMID: 26918822 Phenotypes for gene: DNAH6 were set to Heterotaxy, Azoospermia Review for gene: DNAH6 was set to AMBER Added comment: PMID: 26918822 - zebrafish model has disrupted motile cilia and cilia length, with some body axis defects within embryos. Transfected human cells also had defective motile cilia and cilia width. Two patients with heterotaxy, one homozygous (missense), the other heterozygous (missense), but the heterozygous carrier has an additional known PCD mutation in DNA1. Summary: 1 convincing patient with animal model Sources: Literature |
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| Mendeliome v0.2729 | CCDC28B | Zornitza Stark edited their review of gene: CCDC28B: Added comment: PMID: 32139166 - Single family with Joubert syndrome. Patient was homozygous for a missense, with polydactyly, severe ID, and the molar tooth sign observed in MRI. Sibling fetus MRI showed vermis hypoplasia, and was also homozygous for the variant. Parents confirmed unaffected carriers. Knockdown of CCDC28B in human TERT retinal pigment epithelial cells reduced both the number and length of cilia 430C-T variant is postulated to be a modifier of BBS.; Changed rating: AMBER; Changed publications: 32139166; Changed phenotypes: {Bardet-Biedl syndrome 1, modifier of}, MIM#209900, Joubert syndrome | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2577 | RHOA | Zornitza Stark Phenotypes for gene: RHOA were changed from normal cognition; leukoencephalopathy; micro-ophthalmia; strabismus; linear hypopigmentation; malar hypoplasia; downslanting palpebral fissures; microstomia to normal cognition; leukoencephalopathy; micro-ophthalmia; strabismus; linear hypopigmentation; malar hypoplasia; downslanting palpebral fissures; microstomia; dental anomalies; body asymmetry; limb length discrepancy | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2575 | RHOA | Zornitza Stark reviewed gene: RHOA: Rating: GREEN; Mode of pathogenicity: None; Publications: 31821646; Phenotypes: hypopigmented areas of the skin, dental anomalies, body asymmetry, limb length discrepancy, MRI abnormalities; Mode of inheritance: Other | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2436 | WARS |
Naomi Baker gene: WARS was added gene: WARS was added to Mendeliome. Sources: Literature Mode of inheritance for gene: WARS was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: WARS were set to PMID: 28369220; 31321409; 31069783. Phenotypes for gene: WARS were set to Neuronopathy, distal hereditary motor, type IX (OMIM:617721); juvenile to adult onset (15-23 years); distal wasting; distal weakness; length-dependent motor axonal degeneration Review for gene: WARS was set to GREEN Added comment: 14 patients from five families were reported to have WARS-related neuropathy across three publications. Expression studies of mutant demonstrated decreased protein when compared to wild-type. Sources: Literature |
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| Mendeliome v0.788 | TDP2 |
Zornitza Stark gene: TDP2 was added gene: TDP2 was added to Mendeliome_VCGS. Sources: Expert list Mode of inheritance for gene: TDP2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TDP2 were set to 31410782; 30109272; 24658003 Phenotypes for gene: TDP2 were set to Spinocerebellar ataxia, autosomal recessive 23; OMIM #616949 Review for gene: TDP2 was set to GREEN Added comment: ID is part of the phenotype: 4 families with 6 affected patients, with functional evidence. 1 family with 3 affected sibs with homozygous splice site mutation in the TDP2 gene. Patient cell extracts showed absence of the full-length TDP2 protein and absence of 5-prime TDP activity, consistent with a loss of function, although 3-prime TDP activity, conferred by TDP1, was normal. In addition, patient lymphoblastoid cells were hypersensitive to the TOP2 poison etoposide. The findings indicated impaired capacity for double-strand break repair. 1 unrelated Egyptian patient with a similar disorder was homozygous for a truncating mutation in the TDP2 gene 1 unrelated Caucasian patient with same homozygous splice site mutation in the TDP2 gene. Western blot analysis did not detect TDP2 protein in patient primary skin fibroblasts. Patient fibroblasts showed an inability to rapidly repair topoisomerase-induced DNA double-strand breaks in the nucleus and also showed a profound hypersensitivity to this type of DNA damage. Complementation of patient cells with recombinant human TDP2 restored normal rates of nuclear DSB repair. Sources: Expert list |
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| Mendeliome v0.0 | ENG |
Zornitza Stark gene: ENG was added gene: ENG was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services Mode of inheritance for gene: ENG was set to Unknown |
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