1oa8: Difference between revisions
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|PDB= 1oa8 |SIZE=350|CAPTION= <scene name='initialview01'>1oa8</scene>, resolution 1.70Å | |PDB= 1oa8 |SIZE=350|CAPTION= <scene name='initialview01'>1oa8</scene>, resolution 1.70Å | ||
|SITE= <scene name='pdbsite=AC1:Na+Binding+Site+For+Chain+D'>AC1</scene> | |SITE= <scene name='pdbsite=AC1:Na+Binding+Site+For+Chain+D'>AC1</scene> | ||
|LIGAND= <scene name='pdbligand=NA:SODIUM ION'>NA</scene> | |LIGAND= <scene name='pdbligand=NA:SODIUM+ION'>NA</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1oa8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1oa8 OCA], [http://www.ebi.ac.uk/pdbsum/1oa8 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1oa8 RCSB]</span> | |||
}} | }} | ||
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==Overview== | ==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. | 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. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Bycroft, M.]] | [[Category: Bycroft, M.]] | ||
[[Category: Chen, Y W.]] | [[Category: Chen, Y W.]] | ||
[[Category: high mobility group homology]] | [[Category: high mobility group homology]] | ||
[[Category: hmg]] | [[Category: hmg]] | ||
[[Category: rna-binding]] | [[Category: rna-binding,dimerization]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:42:12 2008'' | ||