Abstract
We identified the gene underlying Marinesco-Sjögren syndrome, which is characterized by cerebellar ataxia, progressive myopathy and cataracts. We identified four disease-associated, predicted loss-of-function mutations in SIL1, which encodes a nucleotide exchange factor for the heat-shock protein 70 (HSP70) chaperone HSPA5. These data, together with the similar spatial and temporal patterns of tissue expression of Sil1 and Hspa5, suggest that disturbed SIL1-HSPA5 interaction and protein folding is the primary pathology in Marinesco-Sjögren syndrome.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Endoplasmic Reticulum Chaperone BiP
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Finland
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Gene Deletion
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Guanine Nucleotide Exchange Factors / analysis
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Guanine Nucleotide Exchange Factors / genetics*
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Guanine Nucleotide Exchange Factors / metabolism
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Heat-Shock Proteins / metabolism*
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Humans
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Molecular Chaperones / metabolism*
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Muscle, Skeletal / chemistry
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Mutation
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Protein Folding
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Proteins / metabolism*
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Spinocerebellar Degenerations / genetics*
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Spinocerebellar Degenerations / metabolism*
Substances
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Endoplasmic Reticulum Chaperone BiP
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Guanine Nucleotide Exchange Factors
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HSPA5 protein, human
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Heat-Shock Proteins
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Molecular Chaperones
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Proteins
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SIL1 protein, human