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Human Molecular Genetics, 2001, Vol. 10, No. 20 2307-2311
© 2001 Oxford University Press

SCA1 molecular genetics: a history of a 13 year collaboration against glutamines

Harry T. Orr+ and Huda Y. Zoghbi1

Institute of Human Genetics, Department of Laboratory Medicine and Pathology, Department of Genetics, Cell Biology and Development, University of Minnesota, Mayo Mail Code 206, Minneapolis, MN 55455, USA and 1Howard Hughes Medical Institute, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA

Spinocerebellar ataxia type 1 (SCA1) is a relatively rare autosomal-dominant neurological disorder. SCA1 has the intriguing feature that the disease-causing mutation is the expansion of an unstable trinucleotide repeat, specifically a CAG repeat that encodes the amino acid glutamine in ataxin-1. During the past 10 years, substantial progress has been made towards understanding the pathogenic mechanism in this disease. The nucleus has been identified as the subcellular site where the mutant protein acts to cause disease. Evidence indicates that expansion of the glutamine tract alters the folding properties of ataxin-1. Finally, several cellular pathways have been identified which are able to impinge on the SCA1 disease process. The characterization of these pathways and their role in SCA1 will guide research over the next several years.

+ To whom correspondence should be addressed. Tel: +1 612 625 3647; Fax: +1 612 626 2600; Email: harry@lenti.med.umn.edu


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