1V06

AXH domain of the transcription factor HBP1 from M.musculus


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGIES 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Axh Domain Adopts Alternative Folds the Solution Structure of Hbp1 Axh.

De Chiara, C.Menon, R.P.Adinolfi, S.De Boer, J.Ktistaki, E.Kelly, G.Calder, L.Kioussis, D.Pastore, A.

(2005) Structure 13: 743

  • DOI: 10.1016/j.str.2005.02.016

  • PubMed Abstract: 
  • AXH is a protein module identified in two unrelated families that comprise the transcriptional repressor HBP1 and ataxin-1 (ATX1), the protein responsible for spinocerebellar ataxia type-1 (SCA1). SCA1 is a neurodegenerative disorder associated with ...

    AXH is a protein module identified in two unrelated families that comprise the transcriptional repressor HBP1 and ataxin-1 (ATX1), the protein responsible for spinocerebellar ataxia type-1 (SCA1). SCA1 is a neurodegenerative disorder associated with protein misfolding and formation of toxic intranuclear aggregates. We have solved the structure in solution of monomeric AXH from HBP1. The domain adopts a nonclassical permutation of an OB fold and binds nucleic acids, a function previously unidentified for this region of HBP1. Comparison of HBP1 AXH with the crystal structure of dimeric ATX1 AXH indicates that, despite the significant sequence homology, the two proteins have different topologies, suggesting that AXH has chameleon properties. We further demonstrate that HBP1 AXH remains monomeric, whereas the ATX1 dimer spontaneously aggregates and forms fibers. Our results describe an entirely novel, to our knowledge, example of a chameleon fold and suggest a link between these properties and the SCA1 pathogenesis.


    Related Citations: 
    • The Axh Module:An Independently Folded Domain Common to Ataxin-1 and Hbp1
      De Chiara, C.,Giannini, C.,Adinolfi, S.,Deboer, J.,Guida, S.,Ramos, A.,Jodice, C.,Kioussis, D.,Pastore, A.
      (2003) FEBS Lett. 551: 107
    • Assignment of the 1H,13C, and 15N Resonances of the Axh Domain of the Transcription Factor Hbp1
      De Chiara, C.,Kelly, G.,Frankiel, T.A.,Pastore, A.
      (2004) J.Biomol.NMR 28: 411


    Organizational Affiliation

    National Institute for Medical Research, The Ridgeway, London, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HMG BOX-CONTAINING PROTEIN 1
A
142Mus musculusMutation(s): 0 
Gene Names: Hbp1
Find proteins for Q8R316 (Mus musculus)
Go to UniProtKB:  Q8R316
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGIES 
  • Olderado: 1V06 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-04-21
    Type: Initial release
  • Version 1.1: 2011-05-07
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance