Pathogenic CWF19L1 variants as a novel cause of autosomal recessive cerebellar ataxia and atrophy

Eur J Hum Genet. 2016 Apr;24(4):619-22. doi: 10.1038/ejhg.2015.158. Epub 2015 Jul 22.

Abstract

Autosomal recessive cerebellar ataxia (ARCA) is a group of neurological disorders characterized by degeneration or abnormal development of the cerebellum and spinal cord. ARCA is clinically and genetically highly heterogeneous, with over 20 genes involved. Exome sequencing of a girl with ARCA from non-consanguineous Dutch parents revealed two pathogenic variants c.37G>C; p.D13H and c.946A>T; p.K316* in CWF19L1, a gene with an unknown function, recently reported to cause ARCA in a Turkish family. Sanger sequencing showed that the c.37G>C variant was inherited from the father and the c.946A>T variant from the mother. Pathogenicity was based on the damaging effect on protein function as the c.37G>C variant changed the highly conserved, negatively charged aspartic acid to the positively charged histidine and the c.946A>T variant introduced a premature stop codon. In addition, 27 patients with ARCA were tested for pathogenic variants in CWF19L1, however, no pathogenic variants were identified. Our data confirm CWF19L1 as a novel but rare gene causing ARCA.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Cell Cycle Proteins / genetics*
  • Cerebellar Ataxia / diagnosis
  • Cerebellar Ataxia / genetics*
  • Child
  • Codon, Terminator
  • Female
  • Genes, Recessive*
  • Humans
  • Male
  • Mutation, Missense*
  • Pedigree

Substances

  • CWF19L1 protein, human
  • Cell Cycle Proteins
  • Codon, Terminator