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Spinocerebellar ataxia: localization of an autosomal dominant locus between two markers on human chromosome 6.

Inherited spinocerebellar ataxias (SCA) are progressively degenerative neurological diseases. The primary site of degeneration is the cerebellar cortex--in particular, the Purkinje cells. In the present report, the SCA locus, inherited as an autosomal dominant trait in a large kindred, is localized to a region approximately 15 centimorgans telomeric of HLA-A on the short arm of chromosome 6.