期刊
HUMAN MOLECULAR GENETICS
卷 24, 期 2, 页码 463-470出版社
OXFORD UNIV PRESS
DOI: 10.1093/hmg/ddu461
关键词
-
资金
- Institut National de la Sante et de la Recherche Medicale (INSERM)
- Agence Nationale pour la Recherche-Maladies Rares and Maladies Neurologiques et Psychiatriques [ANR-09-MNPS-001-01]
- ANR/E-rare JTC [2011-RARE-004-01]
- Canadian Institute of Health Research
Lichtenstein-Knorr syndrome is an autosomal recessive condition that associates sensorineural hearing loss and cerebellar ataxia. Here, we report the first identification of a gene involved in Lichtenstein-Knorr syndrome. By using a combination of homozygosity mapping and whole-exome sequencing, we identified the homozygous p.Gly305Arg missense mutation in SLC9A1 that segregates with the disease in a large consanguineous family. Mutant glycine 305 is a highly conserved amino acid present in the eighth transmembrane segment of all metazoan orthologues of NHE1, the Na+/H+ exchanger 1, encoded by SLC9A1. We demonstrate that the p.Gly305Arg mutation causes the near complete de-glycosylation, mis-targeting and loss of proton pumping activity of NHE1. The comparison of our family with the phenotypes of spontaneous and knockout Slc9a1 murine models demonstrates that the association between ataxia and hearing loss is caused by complete or near complete loss of function of NHE1 and altered regulation of pH(i) in the central nervous system.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据