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  • Title: IQSEC2-related encephalopathy in males due to missense variants in the pleckstrin homology domain.
    Author: Shoubridge C, Dudding-Byth T, Pasquier L, Goel H, Yap P, McConnell V.
    Journal: Clin Genet; 2022 Jul; 102(1):72-77. PubMed ID: 35347702.
    Abstract:
    Pathogenic variants in IQ motif and SEC7 domain containing protein 2 (IQSEC2) gene cause a variety of neurodevelopmental disorders, with intellectual disability as a uniform feature. We report five cases, each with a novel missense variant in the pleckstrin homology (PH) domain of the IQSEC2 protein. Male patients all present with moderate to profound intellectual disability, significant delays or absent language and speech and variable seizures. We describe the phenotypic spectrum associated with missense variants in PH domain of IQSEC2, further delineating the genotype-phenotype correlation for this X-linked gene.
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