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| Autosomal dominant cerebellar ataxia (SCA6) associated with small polyglutamine expansions in the alpha(1A)-voltage-dependent calcium channel |
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| Author(s): Zhuchenko O, Bailey J, Bonnen P, Ashizawa T, Stockton DW, Amos C, Dobyns WB, Subramony SH, Zoghbi HY, Lee CC |
| Source: NATURE GENETICS Volume: 15 Issue: 1 Pages: 62-69 Published: JAN 1997 |
| Times Cited: 889 References: 44 |
| Abstract: A polymorphic CAG repeat was identified in the human alpha(1A) voltage-dependent calcium channel subunit, To test the hypothesis that expansion of this CAG repeat could be the cause of an inherited progressive ataxia, we genotyped a large number of unrelated controls and ataxia patients. Eight unrelated patients with late onset ataxia had alleles with larger repeat numbers (21-27) compared to the number of repeats (4-16) in 475 non-ataxia individuals, Analysis of the repeat length in families of the affected individuals revealed that the expansion segregated with the phenotype in every patient, We identified six isoforms of the human alpha(1A) calcium channel subunit. The CBG repeat is within the open reading frame and is predicted to encode glutamine in three of the isoforms. We conclude that a small polyglutamine expansion in the human alpha(1A) calcium channel is most likely the cause of a newly classified autosomal dominant spinocerebellar ataxia, SCAG. |
| Document Type: Article |
| Language: English |
Addresses:
1. BAYLOR COLL MED, DEPT MOL & HUMAN GENET, HOUSTON, TX 77030 USA
2. BAYLOR COLL MED, DEPT NEUROL, HOUSTON, TX 77030 USA
3. BAYLOR COLL MED, HOWARD HUGHES MED INST, HOUSTON, TX 77030 USA
4. UNIV TEXAS, MD ANDERSON CANC CTR, HOUSTON, TX 77030 USA
5. VET AFFAIRS MED CTR, HOUSTON, TX 77030 USA
6. UNIV MINNESOTA, SCH MED, DEPT NEUROL & PEDIAT, MINNEAPOLIS, MN 55455 USA
7. UNIV MISSISSIPPI, MED CTR, JACKSON, MS 39216 USA |
| Publisher: NATURE PUBLISHING CO, 345 PARK AVE SOUTH, NEW YORK, NY 10010-1707 |
| Subject Category: Genetics & Heredity |
| IDS Number: WA373 |
| ISSN: 1061-4036 |
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