Crystal structure of the N-terminal dimerisation domain of VicH, the H-NS protein from Vibrio cholerae

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.258 

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The Crystal Structure of the N-terminal dimerisation domain of VicH, the H-NS-like protein of Vibrio Cholerae

Cerdan, R.Bloch, V.Yang, Y.Bertin, P.Dumas, C.Rimsky, S.Kochoyan, M.Arold, S.T.

(2003) J Mol Biol 334: 179-185

  • DOI: https://doi.org/10.1016/j.jmb.2003.09.051
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The histone-like nucleoid structuring (H-NS) protein is a global modulator of gene expression in Gram-negative bacteria. VicH, the H-NS protein of Vibrio cholerae, regulates the expression of certain major virulence determinants implicated in the pathogenesis of cholera. We present here the 2.5A crystal structure of the N-terminal oligomerisation domain of VicH (VicH_Nt). VicH_Nt adopts the same fold and dimeric assembly as the NMR structure of Escherichia coli H-NS_Nt, thus validating this fold against conflicting data. The structural similarity of V.cholerae VicH_Nt and E.coli H-NS_Nt, despite differences in origin, system of expression, experimental conditions and techniques used, indicates that the fold determined in our studies is robust to experimental conditions. Structural analysis and homology modelling were carried out to further elucidate the molecular basis of the functional polyvalence of the N-terminal domain. Our analysis of members of the H-NS superfamily supports the suggestion that the oligomerisation function of H-NS_Nt is conserved even in more distantly related proteins.

  • Organizational Affiliation

    Centre de Biochimie Structurale, CNRS-UMR 5048, INSERM-U554, Université Montpellier I, 29 rue de Navacelles 34090 Montpellier, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
VicH protein
A, B
50Vibrio choleraeMutation(s): 0 
Gene Names: vich
Find proteins for Q9KSX6 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Explore Q9KSX6 
Go to UniProtKB:  Q9KSX6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9KSX6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.258 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.085α = 90
b = 49.192β = 90
c = 101.389γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-25
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model
  • Version 1.4: 2023-08-16
    Changes: Data collection, Database references, Refinement description