1OA8

AXH domain of human spinocerebellar ataxin-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

The structure of the AXH domain of spinocerebellar ataxin-1.

Chen, Y.W.Allen, M.D.Veprintsev, D.B.Lowe, J.Bycroft, M.

(2004) J Biol Chem 279: 3758-3765

  • DOI: 10.1074/jbc.M309817200
  • Primary Citation of Related Structures:  
    1OA8

  • PubMed Abstract: 
  • 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 ...

    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.


    Related Citations: 
    • The Axh Module: An Independently Folded Domain Common to Ataxin-1 and Hbp1.
      De Chiara, C., Giannini, C., Adinolfi, S., De Boer, J., Guida, S., Ramos, A., Jodice, C., Kioussis, D., Pastore, A.
      (2003) FEBS Lett 551: 107

    Organizational Affiliation

    Centre for Protein Engineering, Medical Research Council Centre, Cambridge, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATAXIN-1ABCD133Homo sapiensMutation(s): 0 
Gene Names: ATXN1ATX1SCA1
Find proteins for P54253 (Homo sapiens)
Explore P54253 
Go to UniProtKB:  P54253
NIH Common Fund Data Resources
PHAROS  P54253
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download CCD File 
A, C, D
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.783α = 90
b = 82.441β = 90
c = 137.781γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-11-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-24
    Changes: Source and taxonomy
  • Version 1.4: 2019-02-06
    Changes: Data collection, Database references, Experimental preparation
  • Version 1.5: 2019-10-09
    Changes: Data collection, Derived calculations