1OA8

AXH domain of human spinocerebellar ataxin-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.3 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.Lowe, J.Bycroft, M.

(2004) J.Biol.Chem. 279: 3758

  • DOI: 10.1074/jbc.M309817200
  • Also Cited By: 4APT, 4AQP

  • 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 gai ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATAXIN-1
A, B, C, D
133Homo sapiensGene Names: ATXN1 (ATX1, SCA1)
Find proteins for P54253 (Homo sapiens)
Go to Gene View: ATXN1
Go to UniProtKB:  P54253
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 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 = 90.00
b = 82.441β = 90.00
c = 137.781γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
SOLVEphasing
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-11-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-24
    Type: Source and taxonomy