| Date | Panel | Item | Activity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Mendeliome v1.3027 | TBCB | Krithika Murali Marked gene: TBCB as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.3027 | TBCB | Krithika Murali Gene: tbcb has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.3027 | TBCB | Krithika Murali Classified gene: TBCB as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.3027 | TBCB | Krithika Murali Gene: tbcb has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.3026 | TBCB |
Krithika Murali gene: TBCB was added gene: TBCB was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TBCB was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TBCB were set to PMID: 40856104 Phenotypes for gene: TBCB were set to Neurodevelopmental disorder, MONDO:0700092, TBCB-related Review for gene: TBCB was set to AMBER Added comment: PMID: 40856104 Bratman, S. et al 2025 (Genetics in Medicine) report 10 individuals from 8 unrelated families of Ashkenazi Jewish descent with a homozygous missense founder variant in TBCB (c.589T>A, p.Tyr197Asn) identified through exome sequencing. This variant is present at 1.3% carrier frequency in the AJ population in gnomAD v4 with 0 homozygotes. Variant is reasonably well-conserved, REVEL 0.9 and in the Cap-Gly domain. No other homozygous missense variants in this region in gnomAD v4 and homozygous variants rare, overall. Phenotypic features included: - Motor/speech delays in infancy (almost all) - ASD (8/10) - ADHD (5/10) - Mild ID - formal cognitive evaluation (5/8). - Spastic paraparesis in late childhood (9-12y) with slowly progressive gait difficulties and lower limb spasticity. Urinary abnormalities were not reported. - Brain MRI was performed on five individuals - three displayed a thin corpus callosum, and two had decreased white matter. No prenatal features reported. Supportive Drosophilia models. Sources: Literature |
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