Identification of CNTN2 as a genetic modifier of PIGA-CDG in a family with incomplete penetrance and in Drosophila.

Abstract excerpt

Loss-of-function mutations in the X chromosome gene PIGA lead to phosphatidylinositol glycan class A congenital disorder of glycosylation (PIGA-CDG), an ultra-rare CDG typically presenting with seizures, hypotonia, and neurodevelopmental delay. We identified two brothers (probands) with PIGA-CDG, presenting with epilepsy and mild developmental delay. Both probands carry PIGA c.395C>G (p.Ser132Cys), an ultra-rare...

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