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Mendeliome v2.324 FIBCD1 Lucy Spencer gene: FIBCD1 was added
gene: FIBCD1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FIBCD1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FIBCD1 were set to 35916241
Phenotypes for gene: FIBCD1 were set to neurodevelopmental disorder MONDO:0700092, FIBCD1-related
Review for gene: FIBCD1 was set to AMBER
Added comment: PMID 35916241 reports 2 individual from 2 families with a neurodevelopmental disorder and biallelic missense in FIBCD1 (One compound het p.G29S and p.R406C, one homozygous due to UPD p.P456L). One individual also had a de novo missense in CSMD3 K522E which has an established BIallelic association with epilepsy. Features included severe NDD or ASD, dysmorphic features and in one individual MRI abnormalities.

knockdown studies in mice and drosophila recapitulated neurobehavioral deficits.
Sources: Literature
Mendeliome v2.0 CSMD3 Gene migrated from ENSG00000164796 to ENSG00000164796 (gene set migration)
Mendeliome v1.4184 CSMD3 Zornitza Stark reviewed gene: CSMD3: Rating: GREEN; Mode of pathogenicity: None; Publications: 35245678; Phenotypes: ; Mode of inheritance: None
Mendeliome v1.2930 CSMD3 Zornitza Stark Marked gene: CSMD3 as ready
Mendeliome v1.2930 CSMD3 Zornitza Stark Gene: csmd3 has been classified as Green List (High Evidence).
Mendeliome v1.2930 CSMD3 Zornitza Stark Classified gene: CSMD3 as Green List (high evidence)
Mendeliome v1.2930 CSMD3 Zornitza Stark Gene: csmd3 has been classified as Green List (High Evidence).
Mendeliome v1.2925 CSMD3 Sarah Milton gene: CSMD3 was added
gene: CSMD3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CSMD3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CSMD3 were set to PMID: 40632521
Phenotypes for gene: CSMD3 were set to Epilepsy, MONDO:0005027, CSMD3-related
Review for gene: CSMD3 was set to GREEN
Added comment: CSMD3 encodes a synaptic membrane proteins and play a role in neuronal maturation/growth dendrites. A related protein CSMD1 has been previously associated with a complex neurodevelopmental disorder.

PMID: 40632521 describes 8 individuals with seizures. 4 with focal epilepsy, 3 with febrile seizures and 1 individual with infantile spasms. 1 individual described had a de novo missense variant with remainder having comp het/biallelic variants. Mild ID in 1 individual only.

Variant type mostly missense variants with 1 nonsense, all appropriately rare in gnomAD v4 for recessive disorder.

No variant specific functional studies performed, no clear discussion in paper about postulated mechanism for disease. No discussion around difference in mechanism for de novo monoallelic variant.

Previous studies showed homozygous knockout mice display abnormal neuronal proliferation and growth retardation.
Sources: Literature