This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
1oa8
From Proteopedia
|
AXH DOMAIN OF HUMAN SPINOCEREBELLAR ATAXIN-1
Contents |
Overview
Spinocerebellar ataxia type 1 is a late-onset neurodegenerative disease, caused by the expansion of a CAG triplet repeat in the SCA1 gene. This, results in the lengthening of a polyglutamine tract in the gene product, ataxin-1. This produces a toxic gain of function that results in specific, neuronal death. A region in ataxin-1, the AXH domain, exhibits significant, sequence similarity to the transcription factor HBP1. This region of the, protein has been implicated in RNA binding and self-association. We have, determined the crystal structure of the AXH domain of ataxin-1. The AXH, domain is dimeric and contains an OB-fold, a structural motif found in, many oligonucleotide-binding proteins, supporting its proposed role in RNA, binding. By structure comparison with other proteins that contain an, OB-fold, a putative RNA-binding site has been identified. We also, identified a cluster of charged surface residues that are well conserved, among AXH domains. These residues may constitute a second ligand-binding, surface, suggesting that all AXH domains interact with a common yet, unidentified partner.
Disease
Known diseases associated with this structure: Spinocerebellar ataxia-1 OMIM:[601556]
About this Structure
1OA8 is a Single protein structure of sequence from Homo sapiens with as ligand. Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
The structure of the AXH domain of spinocerebellar ataxin-1., Chen YW, Allen MD, Veprintsev DB, Lowe J, Bycroft M, J Biol Chem. 2004 Jan 30;279(5):3758-65. Epub 2003 Oct 28. PMID:14583607
Page seeded by OCA on Sun Feb 3 09:55:29 2008
