A new missense GDAP1 mutation disturbing targeting to the mitochondrial membrane causes a severe form of AR-CMT2C disease
Autor: | Dagmara Kabzińska, Hanna Drac, Andrzej Kochański, Irena Hausmanowa-Petrusewicz, Nina Huber, Ueli Suter, Axel Niemann, Anna Potulska-Chromik |
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Rok vydání: | 2011 |
Předmět: |
Adult
Male congenital hereditary and neonatal diseases and abnormalities Nonsense mutation Mutation Missense Genes Recessive Nerve Tissue Proteins Biology medicine.disease_cause Young Adult 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine Charcot-Marie-Tooth Disease Chlorocebus aethiops Genotype Genetics medicine Animals Humans Missense mutation Gene Genetics (clinical) 030304 developmental biology Chromosome Aberrations 0303 health sciences Mutation Autosomal dominant trait Phenotype Human genetics Pedigree 3. Good health nervous system diseases Protein Transport COS Cells Mitochondrial Membranes Female 030217 neurology & neurosurgery HeLa Cells |
Zdroj: | Neurogenetics |
DOI: | 10.1007/s10048-011-0276-7 |
Popis: | Charcot-Marie-Tooth disease (CMT) caused by mutations in the ganglioside-induced differentiation-associated protein 1 (GDAP1) gene is characterized by a spectrum of phenotypes. Recurrent nonsense mutations (Q163X and S194X) showing regional distribution segregate with an early onset, severe course of recessive CMT disease with early loss of ambulancy. Missense mutations in GDAP1 have been reported in sporadic CMT cases with variable course of disease, among them the recurrent L239F missense GDAP1 mutation occurring in the European population. Finally, some GDAP1 mutations are associated with a mild form of CMT inherited as an autosomal dominant trait. In this study, we characterize the CMT phenotype in one Polish family with recessive trait of inheritance at the clinical, electrophysiological, morphological, cellular, and genetic level associated with a new Gly327Asp mutation in the GDAP1 gene. In spite of the nature of Gly327Asp mutation (missense), the CMT phenotype associated with this variant may be characterized as an early onset, severe axonal neuropathy, with severe skeletal deformities. The mutation lies within the transmembrane domain of GDAP1 and interferes with the mitochondrial targeting of the protein, similar to the loss of the domain in the previously reported Q163X and S194X mutations. We conclude that the loss of mitochondrial targeting is associated with a severe course of disease. Our study shows that clinical outcome of CMT disease caused by mutations in the GDAP1 gene cannot be predicted solely on the basis of genetic results (missense/nonsense mutations). |
Databáze: | OpenAIRE |
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