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| Mendeliome v1.867 | POLD2 | Bryony Thompson Phenotypes for gene: POLD2 were changed from Intellectual disability; immunodeficiency to Non-severe combined immunodeficiency due to polymerase delta deficiency MONDO:0800145 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.864 | POLD2 | Bryony Thompson reviewed gene: POLD2: Rating: AMBER; Mode of pathogenicity: None; Publications: 31449058, 36528861; Phenotypes: Non-severe combined immunodeficiency due to polymerase delta deficiency MONDO:0800145; Mode of inheritance: None | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.390 | FAM20B |
Bryony Thompson gene: FAM20B was added gene: FAM20B was added to Mendeliome. Sources: Other Mode of inheritance for gene: FAM20B was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: FAM20B were set to 30847897; 30105814; 22732358; 27405802 Phenotypes for gene: FAM20B were set to Desbuquois dysplasia MONDO:0015426 Review for gene: FAM20B was set to AMBER Added comment: Two siblings from a single family with neonatal short limb dysplasia resembling Desbuquois dysplasia. One of the siblings underwent genetic testing and compound heterozygous variants were identified in FAM20B ((NM_014864: c.174_178delTACCT p.T59Afs*19/c.1038delG p.N347Mfs*4). Multiple mouse models reported with skeletal abnormalities. Sources: Other |
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| Mendeliome v0.13978 | LTA | Alison Yeung Marked gene: LTA as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13978 | LTA | Alison Yeung Added comment: Comment when marking as ready: Not associated with Mendelian disease | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13978 | LTA | Alison Yeung Gene: lta has been classified as Red List (Low Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13978 | LTA | Alison Yeung Phenotypes for gene: LTA were changed from to Myocardial infarction, susceptibility to, MIM# 608446 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13977 | LTA | Alison Yeung Mode of inheritance for gene: LTA was changed from Other to Other | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13977 | LTA | Alison Yeung Mode of inheritance for gene: LTA was changed from Unknown to Other | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13976 | LTA | Alison Yeung Classified gene: LTA as Red List (low evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13976 | LTA | Alison Yeung Gene: lta has been classified as Red List (Low Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13975 | LTA | Alison Yeung reviewed gene: LTA: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: Myocardial infarction, susceptibility to, MIM# 608446; Mode of inheritance: Other | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10564 | PRDM13 | Zornitza Stark Added comment: Comment when marking as ready: Bi-allelic variants: Recessive disease causing ID and DSD described in three reportedly unrelated families (2 consanguineous), but all are from Malta, and all share the same 13bp deletion spanning an exon-intron boundary. Mouse KO is embryonically lethal, and tissue specific KO failed to replicate many of the patients phenotypes, other than hypoplasia of the cerebellar vermis and hemispheres at P21. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9392 | KCNC2 |
Daniel Flanagan gene: KCNC2 was added gene: KCNC2 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: KCNC2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KCNC2 were set to PMID:32392612; 31972370 Phenotypes for gene: KCNC2 were set to epileptic encephalopathy; spastic tetraplegia; opisthotonos attacks; intellectual disability; West syndrome Review for gene: KCNC2 was set to AMBER Added comment: PMID: 31972370. De novo missense variant (p.Val471Leu) identified in a child with early severe developmental and epileptic encephalopathy, spastic tetraplegia, opisthotonos attacks. PMID: 32392612. De novo missense variant (p.Asp167Tyr) identified in a neurofibromatosis type 1 related West syndrome patient. Functional analysis showed a significant reduction of the mean potassium current and a shift in the voltage dependence of steady-state activation. Maternally inherited NF1 variant (p.T1951Nfs*5) also identified, the mother was "clinically unremarkable". Sources: Expert list |
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| Mendeliome v0.9328 | UNC13B |
Zornitza Stark gene: UNC13B was added gene: UNC13B was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: UNC13B was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: UNC13B were set to 33876820 Phenotypes for gene: UNC13B were set to Epilepsy Review for gene: UNC13B was set to RED Added comment: No OMIM human disease association. Gene encodes a presynaptic protein Munc13-2 highly expressed in the brain (predominantly cerebral cortex). Variant interpretation data in human epilepsy cohort somewhat conflicting and restricted to a single study. Conflicting data esp regarding MOI, and evidence for pathogenicity of several of the variants is limited. Wang et al, Brain, 2021 - trio-based whole-exome sequencing identified UNC13B in 12 individuals affected by partial epilepsy and/or febrile seizures from 8 unrelated families. Identified: x1 de novo nonsense variant, absent in gnomad, damaging in silicos x1 de novo splice site, absent in gnomad, damaging in silicos x1 splice site variant present in unaffected mother (low frequency in gnomad) x2 compound het in one individual - more severe phenotype postulated (x1 variant present in contro cohortl, the other variant present in low frequency in gnomad) x1 missense variant - in Han Chinese major depressive disorders study, not in gnomad x1 missense variant - highly conserved residue, not in gnomad x2 other missense variant - highly conserved residue, low frequency in gnomad Latter 4 missense variants cosegregated with affected individuals in the families In Drosophila, seizure rate and duration were increased by Unc13b knockdown compared to wild-type flies, but these effects were less pronounced than in sodium voltage-gated channel alpha subunit 1 (Scn1a) knockdown Drosophila De novo UNC13B variants previously reported in bipolar disorder and autism spectrum disorder Sources: Expert Review |
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| Mendeliome v0.8962 | TBX1 | Zornitza Stark Phenotypes for gene: TBX1 were changed from to DiGeorge syndrome MIM# 188400; Velocardiofacial syndrome MIM# 192430; Decreased T cells; Hypoparathyroidism; Conotruncal cardiac malformation; velopalatal insufficiency; abnormal facies (cleft palate, prominent tubular nose etc); intellectual disability; Immunodeficiency; thymic hypoplasia or aplasia with resultant T‐cell dysfunction; renal anomalies; autoimmunity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8959 | TBX1 | Zornitza Stark reviewed gene: TBX1: Rating: GREEN; Mode of pathogenicity: None; Publications: 20301696, 31830774, 16684884; Phenotypes: DiGeorge syndrome MIM# 188400, Velocardiofacial syndrome MIM# 192430, Decreased T cells, Hypoparathyroidism, Conotruncal cardiac malformation, velopalatal insufficiency, abnormal facies (cleft palate, prominent tubular nose etc), intellectual disability, Immunodeficiency, thymic hypoplasia or aplasia with resultant T‐cell dysfunction, renal anomalies, autoimmunity; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8946 | RAG1 | Zornitza Stark Phenotypes for gene: RAG1 were changed from to Alpha/beta T-cell lymphopenia with gamma/delta T-cell expansion, severe cytomegalovirus infection, and autoimmunity MIM# 609889; Combined cellular and humoral immune defects with granulomas MIM# 233650; Omenn syndrome MIM# 603554; Severe combined immunodeficiency, B cell-negative MIM# 601457 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8937 | RAG1 | Danielle Ariti reviewed gene: RAG1: Rating: GREEN; Mode of pathogenicity: None; Publications: 16276422, 18463379, 20489056, 9630231, 11313270, 17476359, 8810255, 6823332; Phenotypes: Alpha/beta T-cell lymphopenia with gamma/delta T-cell expansion, severe cytomegalovirus infection, and autoimmunity MIM# 609889, Combined cellular and humoral immune defects with granulomas MIM# 233650, Omenn syndrome MIM# 603554, Severe combined immunodeficiency, B cell-negative MIM# 601457; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8601 | CLCN3 |
Kristin Rigbye gene: CLCN3 was added gene: CLCN3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CLCN3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: CLCN3 were set to PMID: 34186028 Phenotypes for gene: CLCN3 were set to Neurodevelopmental disorder Mode of pathogenicity for gene: CLCN3 was set to Other Review for gene: CLCN3 was set to GREEN Added comment: 11 individuals reported, 9 that carried 8 different rare heterozygous missense variants in CLCN3, and 2 siblings that were homozygous for an NMD-predicted frameshift variant likely abolishing ClC-3 function. All missense variants were confirmed to be de novo in eight individuals for whom parental data was available. The 11 individuals in the cohort share clinical features of variable severity. All 11 have GDD or ID and dysmorphic features, and a majority has mood or behavioural disorders and structural brain abnormalities: - Structural brain abnormalities on MRI (9/11) included partial or full agenesis of the corpus callosum (6/9), disorganized cerebellar folia (4/9), delayed myelination (3/9), decreased white matter volume (3/9), pons hypoplasia (3/9), and dysmorphic dentate nuclei (3/9). Six of those with brain abnormalities also presented with seizures. - Nine have abnormal vision, including strabismus in four and inability to fix or follow in the two with homozygous loss-of-function variants. - Hypotonia ranging from mild to severe was reported in 7 of the 11 individuals. - Six have mood or behavioural disorders, particularly anxiety (3/6). - Consistent dysmorphic facial features included microcephaly, prominent forehead, hypertelorism, down-slanting palpebral fissures, full cheeks, and micrognathia. The severity of disease in the two siblings with homozygous disruption of ClC-3 is consistent with the drastic phenotype seen in Clcn3 KO mice. The disease was more severe in two siblings carrying homozygous loss-of-function variants with the presence of GDD, absent speech, seizures, and salt and pepper fundal pigmentation in both individuals, with one deceased at 14 months of age. The siblings also had significant neuroanatomical findings including diffusely decreased white matter volume, thin corpora callosa, small hippocampi, and disorganized cerebellar folia. Supporting biallelic inheritance for LoF variants, disruption of mouse Clcn3 results in drastic neurodegeneration with loss of the hippocampus a few months after birth and early retinal degeneration. Clcn3−/− mice display severe neurodegeneration, whereas heterozygous Clcn3+/− mice appear normal. Patch-clamp studies were used to investigate four of the missense variants. These suggested a gain of function in two variants with increased current in HEK cells, however they also showed reduced rectification of voltage and a loss of transient current, plus decreased current amplitude, glycosylation and surface expression when expressed in oocytes, and were suspected to interfere with channel gating and a negative feedback mechanism. These effects were also shown to vary depending on pH levels. The current of the remaining two variants did not differ from WT. For heterozygous missense variants, the disruption induced may be at least partially conferred to mutant/WT homodimers and mutant/ClC-4 heterodimers. Both loss and gain of function in this gene resulted in the same phenotype. Sources: Literature |
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| Mendeliome v0.8292 | IRX5 |
Eleanor Williams changed review comment from: Associated with Hamamy syndrome #611174 (AR) in OMIM. Hamamy syndrome is characterised by craniofacial dysmorphism, hearing loss, skeletal anomalies, microcytic hypochromic anemia and congenital heart defects. Severe myopia has also been reported. Homozygous missense variants in IRX5 were reported in 2 families with this condition. Cone dystrophy ------------------- PMID: 33891002 - Khol et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments. Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected. They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.; to: Associated with Hamamy syndrome #611174 (AR) in OMIM. Hamamy syndrome is characterised by craniofacial dysmorphism, hearing loss, skeletal anomalies, microcytic hypochromic anemia and congenital heart defects. Severe myopia has also been reported. Homozygous missense variants in IRX5 were reported in 2 families with this condition (PMID: 22581230;17230486) Duplication of gene ------------------- PMID: 33891002 - Kohl et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments. Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected. They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae. Loss of function/gene --------- PMID: 28041643 - Carss et al 2017 - screened a cohort of 722 individuals with inherited retinal disease using WES/WGS. 1 case reported with a biallelic deletion in IRX5 reported which leads to a frameshift ENST00000394636.4; c.1362_1366delTAAAG, p.Lys455ProfsTer19 in a patient with retinitis pigmentosa. PMID: 32045705 - Apuzzo et al 2020 - report 2 cases of loss of a region in 16q12.1q21 which encompasses IRX5 and IRX6 and many other genes, which together with 3 other previous reports of deletions in this region help define a syndrome with features that include dysmorphic features, short stature, microcephaly, global developmental delay/intellectual disability, autism spectrum disorder (ASD) and ocular abnormalities (nystagmus and strabismus). |
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| Mendeliome v0.7135 | LAMP2 |
Zornitza Stark changed review comment from: XLD. Vacuolar cardiomyopathy and myopathy. Gene encodes lysosome-associated membrane protein-2.; to: XLD. Gene encodes lysosome-associated membrane protein-2. Danon disease is an X-linked dominant disorder predominantly affecting cardiac muscle. Skeletal muscle involvement and mental retardation are variable features. The accumulation of glycogen in muscle and lysosomes originally led to the classification of Danon disease as a variant of glycogen storage disease II (Pompe disease) with 'normal acid maltase' or alpha-glucosidase, however, it may be more accurately classified as a lysosomal disorder. |
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| Mendeliome v0.5182 | HBB | Zornitza Stark Phenotypes for gene: HBB were changed from to Delta-beta thalassemia 141749; Erythrocytosis 6 617980; Heinz body anemia 140700; Hereditary persistence of fetal hemoglobin 141749; Methemoglobinemia, beta type 617971; Sickle cell anemia 603903; Thalassemia-beta, dominant inclusion-body 603902; Thalassemia, beta 613985 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5174 | HBB | Elena Savva reviewed gene: HBB: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 31788855, 20301599, 29700171; Phenotypes: {Malaria, resistance to} 611162, Delta-beta thalassemia 141749, Erythrocytosis 6 617980, Heinz body anemia 140700, Hereditary persistence of fetal hemoglobin 141749, Methemoglobinemia, beta type 617971, Sickle cell anemia 603903, Thalassemia-beta, dominant inclusion-body 603902, Thalassemia, beta 613985; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3450 | DACT1 |
Natalie Tan gene: DACT1 was added gene: DACT1 was added to Mendeliome. Sources: NHS GMS Mode of inheritance for gene: DACT1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: DACT1 were set to PMID: 28054444; 22610794; 19701191 Phenotypes for gene: DACT1 were set to ?Townes-Brocks syndrome 2 (OMIM #617466) Review for gene: DACT1 was set to RED Added comment: Webb et al. (2017) reported 6 affected members of a 3-generation family with ?Townes-Brocks syndrome-2, identified heterozygosity for a nonsense mutation in the DACT1 gene that segregated with disease. Clinical features include imperforate anus, rectovaginal fistula, crossed fused renal ectopia, vesicoureteral reflux, unilateral microtia, overfolded helices and cupped ears. One family member (proband's mother) with scoliosis and spina bifida occulta. Neural tube defects reported in a study of human fetuses (PMID: 22610794) and a mouse model (PMID: 19701191). Listed in Decipher v10.0 for an individual with abnormalities of (i) head or neck (ii) nervous system (iii) skeletal system. Unlike the gene SALL1 that causes Townes-Brocks syndrome 1, there is no information specifically relating to DACT1 with radial dysplasia, as these were not observed in the family with ?Townes-Brocks syndrome 2 (PMID: 28054444). Sources: NHS GMS |
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| Mendeliome v0.3078 | SI | Zornitza Stark Phenotypes for gene: SI were changed from to Sucrase-isomaltase deficiency, congenital #222900 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3074 | SI | Elena Savva reviewed gene: SI: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 3149304, 31557950; Phenotypes: Sucrase-isomaltase deficiency, congenital #222900; Mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 v0.0 | LTA |
Zornitza Stark gene: LTA was added gene: LTA was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services Mode of inheritance for gene: LTA was set to Unknown |
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