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| Intellectual disability syndromic and non-syndromic v0.6755 | HEPACAM | Zornitza Stark Phenotypes for gene: HEPACAM were changed from to Megalencephalic leukoencephalopathy with subcortical cysts 2A MONDO:0013490; Megalencephalic leukoencephalopathy with subcortical cysts 2B, remitting, with or without intellectual disability MONDO:0013491 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.6406 | MLC1 | Zornitza Stark Phenotypes for gene: MLC1 were changed from to Megalencephalic leukoencephalopathy with subcortical cysts (MIM#604004) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.6303 | MLC1 | Chirag Patel reviewed gene: MLC1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 11254442, 18757878, 16652334; Phenotypes: Megalencephalic leukoencephalopathy with subcortical cysts (MIM#604004); Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.6222 | HEPACAM | Sangavi Sivagnanasundram reviewed gene: HEPACAM: Rating: GREEN; Mode of pathogenicity: None; Publications: 21419380, 24202401, 27389245, 31372844, 21419380, 24202401, 27322623; Phenotypes: Megalencephalic leukoencephalopathy with subcortical cysts 2A MONDO:0013490, Megalencephalic leukoencephalopathy with subcortical cysts 2B, remitting, with or without intellectual disability MONDO:0013491; Mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.6147 | DCX | Zornitza Stark Phenotypes for gene: DCX were changed from to Lissencephaly, X-linked, MIM# 300067; Subcortical laminal heterotopia, X-linked 300067 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.6123 | DCX |
Sumudu Perera changed review comment from: Pathology: PMID: 26743950 - DCX mutations usually cause anterior dominant lissencephaly in males and subcortical band heterotopia (SBH) in females Phenotype: Demelas et al. (2001) (PMID:11468322) demonstrated three brothers with phenotype of microcephaly, mild to moderate developmental delay, seizures and other neurologic abnormalities, as well as classic lissencephaly on MRI. Lawrence et al. (2010) (PMID: 20726879) discuss 3 male members had severe epilepsy and intellectual disability; finding of missense mutation in DCX. Of note all 3 had been diagnosed with Lennox-Gastaut syndrome. GeneReviews (PMID: 20301364): "Males with classic DCX-related lissencephaly typically have early and profound cognitive and language impairment, cerebral palsy, and epileptic seizures. The clinical phenotype in females with SBH varies widely with cognitive abilities that range from average or mild cognitive impairment to severe intellectual disability and language impairment." Other papers: 1) Somatic mosaicism and variable penetrance - PMID: 12552055 2) Functional testing: PMID: 9489699; to: Pathology: PMID: 26743950 - DCX mutations usually cause anterior dominant lissencephaly in males and subcortical band heterotopia (SBH) in females Phenotype: Demelas et al. (2001) (PMID:11468322) demonstrated three brothers with phenotype of microcephaly, mild to moderate developmental delay, seizures and other neurologic abnormalities, as well as classic lissencephaly on MRI. Lawrence et al. (2010) (PMID: 20726879) discuss 3 male members had severe epilepsy and intellectual disability; finding of missense mutation in DCX. Of note all 3 had been diagnosed with Lennox-Gastaut syndrome. GeneReviews (PMID: 20301364): "Males with classic DCX-related lissencephaly typically have early and profound cognitive and language impairment, cerebral palsy, and epileptic seizures. The clinical phenotype in females with SBH varies widely with cognitive abilities that range from average or mild cognitive impairment to severe intellectual disability and language impairment." Other papers: 1) Somatic mosaicism and variable penetrance - PMID: 12552055 2) Functional testing: PMID: 9489699 |
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| Intellectual disability syndromic and non-syndromic v0.6123 | DCX | Sumudu Perera reviewed gene: DCX: Rating: ; Mode of pathogenicity: None; Publications: 26743950, 11468322, 20726879, 20301364, 12552055, 9489699; Phenotypes: Lissencephaly, X-linked, MIM# 300067, Subcortical laminal heterotopia, X-linked 300067; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.5814 | BCORL1 | Zornitza Stark Classified gene: BCORL1 as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.5814 | BCORL1 | Zornitza Stark Gene: bcorl1 has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.5798 | BCORL1 | Sangavi Sivagnanasundram reviewed gene: BCORL1: Rating: ; Mode of pathogenicity: None; Publications: https://search.clinicalgenome.org/CCID:004254; Phenotypes: Shukla-Vernon syndrome MONDO:0026727; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.5792 | NOTCH3 | Ain Roesley Phenotypes for gene: NOTCH3 were changed from neurodevelopmental disorder MONDO:0700092, NOTCH3-related; Cerebral arteriopathy with subcortical infarcts and leukoencephalopathy 1, MIM#125310 to neurodevelopmental disorder MONDO:0700092, NOTCH3-related; Cerebral arteriopathy with subcortical infarcts and leukoencephalopathy 1, MIM#125310 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.5791 | NOTCH3 | Ain Roesley Phenotypes for gene: NOTCH3 were changed from Cerebral arteriopathy with subcortical infarcts and leukoencephalopathy 1, MIM#125310 to neurodevelopmental disorder MONDO:0700092, NOTCH3-related; Cerebral arteriopathy with subcortical infarcts and leukoencephalopathy 1, MIM#125310 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.5323 | AQP4 | Zornitza Stark Phenotypes for gene: AQP4 were changed from ?Megalencephalic leukoencephalopathy with subcortical cysts 4, remitting MIM#620448 to Megalencephalic leukoencephalopathy with subcortical cysts 4, remitting MIM#620448 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.5317 | AQP4 |
Lucy Spencer gene: AQP4 was added gene: AQP4 was added to Intellectual disability syndromic and non-syndromic. Sources: Literature Mode of inheritance for gene: AQP4 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: AQP4 were set to 37143309 Phenotypes for gene: AQP4 were set to ?Megalencephalic leukoencephalopathy with subcortical cysts 4, remitting MIM#620448 Review for gene: AQP4 was set to AMBER Added comment: PMID: 37143309 Cohort patients with an MRI based diagnosis of megalencephalic leukoencephalopathy with subcortical cysts (MLC). Missense variant in AQP4 seen homozygous in 2 siblings and het in the parents. Patients had macrocephaly, developmental delay, hypotonia, epilepsy, and cognitive deficit. Western blots on generated MDCK cell lines showed no detectable expression of AQP4 protein from the cells with the patients variant. Immunofluorescence also showed no membrane expression. Overexpression studies in HEK293T cells showed WT was seen as mainly monomers or dimers where as variant protein formed large aggregates- likely due to the saturation of protein degradation pathways because of the overexpression. Sources: Literature |
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| Intellectual disability syndromic and non-syndromic v0.5313 | GPRC5B |
Lucy Spencer gene: GPRC5B was added gene: GPRC5B was added to Intellectual disability syndromic and non-syndromic. Sources: Literature Mode of inheritance for gene: GPRC5B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: GPRC5B were set to PMID: 37143309 Phenotypes for gene: GPRC5B were set to Megalencephalic leukoencephalopathy with subcortical cysts 3 MIM#620447 Review for gene: GPRC5B was set to GREEN Added comment: PMID: 37143309 Cohort of 5 patients with an MRI based diagnosis of megalencephalic leukoencephalopathy with subcortical cysts (MLC). 3 unrelated patients had variants in GPRC5B, 2 have the same inframe dup Ile175dup and the third has an in frame dup of Ala177. All 3 were de novo and unaffected siblings did not have the variants. All patients have macrocephaly, delayed motor development, spasticity, ataxia and dystonia, seizures, all had varying degrees of cognitive deficits. MRI showed MLC, abnormal and swollen cerebral white matter. Patient cell lines showed reduced regulatory volume decrease, and western blot showed a strong increase in GRPC5B levels in patient lymphoblasts. Together, these findings indicate disturbed volume regulation in lymphoblasts from patients with GPRC5B variants, potentially due to increased GPRC5B levels. Transfected cells caused increased volume-regulated anion channel activity. Sources: Literature |
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| Intellectual disability syndromic and non-syndromic v0.2894 | PAFAH1B1 | Zornitza Stark Phenotypes for gene: PAFAH1B1 were changed from to Lissencephaly 1, MIM# 607432; Subcortical laminar heterotopia, MIM# 607432; MONDO:0011830 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.2891 | PAFAH1B1 | Zornitza Stark reviewed gene: PAFAH1B1: Rating: GREEN; Mode of pathogenicity: None; Publications: 11754098, 18285425; Phenotypes: Lissencephaly 1, MIM# 607432, Subcortical laminar heterotopia, MIM# 607432, MONDO:0011830; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.2823 | BCOR | Zornitza Stark Marked gene: BCOR as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.2823 | BCOR | Zornitza Stark Gene: bcor has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.2823 | BCOR | Zornitza Stark Phenotypes for gene: BCOR were changed from to Microphthalmia, syndromic 2, MIM# 300166; Oculofaciocardiodental syndrome; Lenz microphthalmia | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.2822 | BCOR | Zornitza Stark Publications for gene: BCOR were set to | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.2821 | BCOR | Zornitza Stark Mode of inheritance for gene: BCOR was changed from Unknown to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.2820 | BCOR | Zornitza Stark reviewed gene: BCOR: Rating: GREEN; Mode of pathogenicity: None; Publications: 29974297; Phenotypes: Microphthalmia, syndromic 2, MIM# 300166, Oculofaciocardiodental syndrome, Lenz microphthalmia; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.1632 | TUBGCP2 |
Zornitza Stark gene: TUBGCP2 was added gene: TUBGCP2 was added to Intellectual disability syndromic and non-syndromic. Sources: Literature Mode of inheritance for gene: TUBGCP2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TUBGCP2 were set to 31630790 Phenotypes for gene: TUBGCP2 were set to Lissencephaly; pachygyria; subcortical band heterotopia; microcephaly; intellectual disability Review for gene: TUBGCP2 was set to GREEN Added comment: Four unrelated families reported. Sources: Literature |
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| Intellectual disability syndromic and non-syndromic v0.1300 | BCORL1 | Zornitza Stark Marked gene: BCORL1 as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.1300 | BCORL1 | Zornitza Stark Gene: bcorl1 has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.1300 | BCORL1 | Zornitza Stark Classified gene: BCORL1 as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.1300 | BCORL1 | Zornitza Stark Gene: bcorl1 has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.1299 | BCORL1 |
Zornitza Stark gene: BCORL1 was added gene: BCORL1 was added to Intellectual disability, syndromic and non-syndromic_GHQ_VCGS. Sources: Literature Mode of inheritance for gene: BCORL1 was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) Publications for gene: BCORL1 were set to 24123876; 30941876 Phenotypes for gene: BCORL1 were set to Shukla-Vernon syndrome, MIM#301029 Review for gene: BCORL1 was set to GREEN Added comment: Four unrelated families reported altogether; some mothers mildly affected. Sources: Literature |
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| Intellectual disability syndromic and non-syndromic v0.877 | NOTCH3 | Zornitza Stark Phenotypes for gene: NOTCH3 were changed from to Cerebral arteriopathy with subcortical infarcts and leukoencephalopathy 1, MIM#125310 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.874 | NOTCH3 | Zornitza Stark reviewed gene: NOTCH3: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: Cerebral arteriopathy with subcortical infarcts and leukoencephalopathy 1, MIM#125310; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability syndromic and non-syndromic v0.0 | BCOR |
Zornitza Stark gene: BCOR was added gene: BCOR was added to Intellectual disability, syndromic and non-syndromic_GHQ. Sources: Expert Review Green,Genetic Health Queensland Mode of inheritance for gene: BCOR was set to Unknown |
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