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Browsing by Author "Hartley, T"

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  • De Novo Truncating Mutations in WASF1 Cause Intellectual Disability with Seizures
    Publication . Ito, Y; Carss, KJ; Duarte, ST; Hartley, T; Keren, B; Kurian, MA; Marey, I; Charles, P; Mendonça, C; Nava, C; Pfundt, R; Sanchis-Juan, A; van Bokhoven, H; van Essen, A; van Ravenswaaij-Arts, C; Boycott, KM; Kernohan, KD; Dyack, S; Raymond, FL
    Next-generation sequencing has been invaluable in the elucidation of the genetic etiology of many subtypes of intellectual disability in recent years. Here, using exome sequencing and whole-genome sequencing, we identified three de novo truncating mutations in WAS protein family member 1 (WASF1) in five unrelated individuals with moderate to profound intellectual disability with autistic features and seizures. WASF1, also known as WAVE1, is part of the WAVE complex and acts as a mediator between Rac-GTPase and actin to induce actin polymerization. The three mutations connected by Matchmaker Exchange were c.1516C>T (p.Arg506Ter), which occurs in three unrelated individuals, c.1558C>T (p.Gln520Ter), and c.1482delinsGCCAGG (p.Ile494MetfsTer23). All three variants are predicted to partially or fully disrupt the C-terminal actin-binding WCA domain. Functional studies using fibroblast cells from two affected individuals with the c.1516C>T mutation showed a truncated WASF1 and a defect in actin remodeling. This study provides evidence that de novo heterozygous mutations in WASF1 cause a rare form of intellectual disability.
    2018Journal article Open access Show more