Sarah Leigh Phenotypes for gene: CSNK2B were changed from Intellectual disability with or without myoclonic epilepsy to Poirier-Bienvenu neurodevelopmental syndrome, OMIM:618732; Poirier-Bienvenu neurodevelopmental syndrome, MONDO:0032889
Rebecca Foulger commented on gene: CSNK2B: PMID:30655572: Nakashima et al, 2019 describe 4 patients with ID, DD and seizures. Two of the patients had variants in CSNK2B: c.533_534insGT, p.(Pro179Tyrfs*49) in Malaysian Patient 3, and c.494A>G, p.(His165Arg) in Japanese Patient 4. Both had seizures within 2 months of age. Both variants occurred de novo. In each patient, only 1 likely candidate variant was proposed. Functional assays suggested that Pro179Tyrfs*49 mutant protein was produced but showed disrupted interaction with CSNK2A1.
Rebecca Foulger Added comment: Comment on list classification: Updated rating from Red to Green: As summarised by Zornitza, three unrelated patients reported in the literature (one in PMID:28762608 and two in PMID:28585349) with intellectual disability and de novo variants in CSNK2B (splice variant and a frameshift truncating variant). Two of the patients also had monoclonic epilepsy.
Rebecca Foulger Mode of inheritance for gene: CSNK2B was changed from MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown