Crystal Structure of the Periplasmic Catecholate-Siderophore Binding Protein VctP from Vibrio Cholerae

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

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Crystal structure of periplasmic catecholate-siderophore binding protein VctP from Vibrio cholerae at 1.7 A resolution

Liu, X.Du, Q.Wang, Z.Liu, S.Li, N.Chen, Y.Zhu, C.Zhu, D.Wei, T.Huang, Y.Xu, S.Gu, L.

(2012) FEBS Lett 586: 1240-1244

  • DOI: https://doi.org/10.1016/j.febslet.2012.03.043
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    VctP, one of the two essential siderophore-binding PBPs from the pathogen Vibrio cholerae, plays an important role in the transport of enterobactin and vibriobactin, which have quite different configurations of iron coordination, from the periplasm to the inner membrane. The current study reports the crystal structure of VctP from V. cholerae N16961 at 1.7Å resolution. A structural comparison of VctP with its homologues and the results of molecular docking indicate that enterobactin and vibriobactin share the same binding pocket. Significantly, a basic triad consisting of Arg137, Arg226 and Arg270 is used to balance the three negative charges of ferric-enterobactin, while a basic dyad consisting of Arg137 and Arg270 is used to balance the two negative charges of ferric-vibriobactin.

  • Organizational Affiliation

    State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Iron(III) ABC transporter, periplasmic iron-compound-binding protein292Vibrio choleraeMutation(s): 0 
Gene Names: VC_A0227
Find proteins for Q9KMU2 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Explore Q9KMU2 
Go to UniProtKB:  Q9KMU2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9KMU2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.112α = 90
b = 73.282β = 90
c = 112.819γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-08-15
    Type: Initial release