Eur J Med Genet 2019 Nov 22;62(11):103582. Epub 2018 Nov 22.
Department of Neurology and Hertie-Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany; German Center of Neurodegenerative Diseases (DZNE), Tübingen, Germany. Electronic address:
Based on a homozygous missense variant p.Pro311Ala found in three siblings of a consanguineous family, mutations in the STYXL1 gene were suggested to cause moderate intellectual disability, epilepsy and complex behavioural abnormalities. We have detected this variant via whole exome sequencing in a homozygous state in two families. Segregation analyses in our families and thorough validation in international genetic databases provides evidence that this variant is most likely benign. This is important information for genetic counselling. The role of STYXL1 variants in human disease needs to be established.