Expression analysis of the ataxin–1 protein in tissues from normal and spinocerebellar ataxia type 1 individuals
Copyright policy )Expression analysis of the ataxin–1 protein in tissues from normal and spinocerebellar ataxia type 1 individuals
Spinocerebellar ataxia type 1 (SCA1) is an autosomal dominant neurodegenerative disorder caused by expansion of a CAG trinucleotide repeat which codes for glutamine in the protein ataxin-1. We have investigated the effect of this expansion on ataxin-1 by immunoblot analysis. The wild-type protein is detected in both normal and affected individuals; however, a mutant protein which varies in its migration properties according to the size of the CAG repeat is detected in cultured cells and tissues from SCA1 individuals. The protein has a nuclear localization in all normal and SCA1 brain regions examined but a cytoplasmic localization of ataxin-1 was also observed in cerebellar Purkinje cells. Our data show that in SCA1, the expanded alleles are faithfully translated into proteins of apparently normal stability and distribution.
- University of Minnesota United States
- University of Minnesota Morris United States
- Baylor College of Medicine United States
- University of Minnesota System United States
Cell Nucleus, Male, Cytoplasm, Glutamine, Immunoblotting, Brain, Nuclear Proteins, Nerve Tissue Proteins, Immunohistochemistry, Cerebellar Cortex, Mice, Purkinje Cells, Ataxins, Gene Expression Regulation, Animals, Humans, Female, Lymphocytes, Ataxin-1, Cells, Cultured
Cell Nucleus, Male, Cytoplasm, Glutamine, Immunoblotting, Brain, Nuclear Proteins, Nerve Tissue Proteins, Immunohistochemistry, Cerebellar Cortex, Mice, Purkinje Cells, Ataxins, Gene Expression Regulation, Animals, Humans, Female, Lymphocytes, Ataxin-1, Cells, Cultured
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