NGLY1 mutation causes neuromotor impairment, intellectual disability, and neuropathy


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ÇAĞLAYAN A. O., Comu S., Baranoski J. F., Parman Y., Kaymakcalan H., Akgumus G. T., ...More

EUROPEAN JOURNAL OF MEDICAL GENETICS, vol.58, no.1, pp.39-43, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58 Issue: 1
  • Publication Date: 2015
  • Doi Number: 10.1016/j.ejmg.2014.08.008
  • Journal Name: EUROPEAN JOURNAL OF MEDICAL GENETICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.39-43
  • Keywords: Deglycosylation, Intellectual disability, Neuromotor defect, NGLY1, Whole-exome sequencing, UNFOLDED PROTEIN RESPONSE, N-GLYCANASE, DISORDERS, DEGRADATION, PATHWAY
  • Dokuz Eylül University Affiliated: No

Abstract

N-glycanase 1 (NGLY1) is a conserved enzyme that is responsible for the deglycosylation of misfolded N-glycosylated proteins in the cytoplasm prior to their proteasome-mediated degradation. Disruption of this degradation process has been associated with various neurologic diseases including amyotrophic lateral sclerosis and Parkinson's disease. Here, we describe two siblings with neuromotor impairment, apparent intellectual disability, corneal opacities, and neuropathy who were found to possess a novel homozygous frame-shift mutation due to a 4 base pair deletion in NGLY1 (c.1533_1536delTCAA. p.Asn511LysfsX51). We hypothesize that this mutation likely limits the capability of neuronal cells to respond to stress due to accumulation of misfolded proteins, thereby impairing their survival and resulting in progressive loss of neurological function. (C) 2014 Elsevier Masson SAS. All rights reserved.