Truncating Mutations of , a Gene within the Prader-Willi Locus, Are Responsible for Severe Arthrogryposis

Arthrogryposis multiplex congenita (AMC) is characterized by the presence of multiple joint contractures resulting from reduced or absent fetal movement. Here, we report two unrelated families affected by lethal AMC. By genetic mapping and whole-exome sequencing in a multiplex family, a heterozygous truncating MAGEL2 mutation leading to frameshift and a premature stop codon (c.1996delC, p.Gln666Serfs∗36) and inherited from the father was identified in the probands. In another family, a distinct heterozygous truncating mutation leading to frameshift (c.2118delT, p.Leu708Trpfs∗7) and occurring de novo on the paternal allele of MAGEL2 was identified in the affected individual.

Source: The American Journal of Human Genetics - September 10, 2015 Category: Genetics & Stem Cells Authors: Dan Mejlachowicz, Flora Nolent, Jérome Maluenda, Hanitra Ranjatoelina-Randrianaivo, Fabienne Giuliano, Ivo Gut, Damien Sternberg, Annie Laquerrière, Judith Melki Tags: Report Source Type: research