The crystal structure of the outer membrane protein VceC from the bacterial pathogen Vibrio cholerae at 1.8 resolution

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 

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The crystal structure of the outer membrane protein VCEC from the bacterial pathogen vibrio cholerae at 1.8 A resolution

Federici, L.Du, D.Walas, F.Matsumura, H.Fernandez-Recio, J.McKeegan, K.S.Borges-Walmsley, M.I.Luisi, B.F.Walmsley, A.R.

(2005) J Biol Chem 280: 15307-15314

  • DOI: https://doi.org/10.1074/jbc.M500401200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Multidrug resistance in Gram-negative bacteria arises in part from the activities of tripartite drug efflux pumps. In the pathogen Vibrio cholerae, one such pump comprises the inner membrane proton antiporter VceB, the periplasmic adaptor VceA, and the outer membrane channel VceC. Here, we report the crystal structure of VceC at 1.8 A resolution. The trimeric VceC is organized in the crystal lattice within laminar arrays that resemble membranes. A well resolved detergent molecule within this array interacts with the transmembrane beta-barrel domain in a fashion that may mimic protein-lipopolysaccharide contacts. Our analyses of the external surfaces of VceC and other channel proteins suggest that different classes of efflux pumps have distinct architectures. We discuss the implications of these findings for mechanisms of drug and protein export.

  • Organizational Affiliation

    Department of Biochemistry, University of Cambridge, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
multidrug resistance protein442Vibrio choleraeMutation(s): 1 
Membrane Entity: Yes 
Find proteins for Q9KS51 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Explore Q9KS51 
Go to UniProtKB:  Q9KS51
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9KS51
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.458α = 90
b = 71.458β = 90
c = 190.702γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-03-01
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Data collection, Database references, Derived calculations, Structure summary
  • Version 1.4: 2021-11-10
    Changes: Advisory, Database references, Structure summary
  • Version 1.5: 2024-05-29
    Changes: Data collection