3OC5

Crystal Structure of the vibrio cholerae secreted colonization factor TcpF


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of the Vibrio cholerae Colonization Factor TcpF and Identification of a Functional Immunogenic Site.

Megli, C.J.Yuen, A.S.Kolappan, S.Richardson, M.R.Dharmasena, M.N.Krebs, S.J.Taylor, R.K.Craig, L.

(2011) J.Mol.Biol. 409: 146-158

  • DOI: 10.1016/j.jmb.2011.03.027
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Vibrio cholerae relies on two main virulence factors--toxin-coregulated pilus (TCP) and cholera toxin--to cause the gastrointestinal disease cholera. TCP is a type IV pilus that mediates bacterial autoagglutination and colonization of the intestine. ...

    Vibrio cholerae relies on two main virulence factors--toxin-coregulated pilus (TCP) and cholera toxin--to cause the gastrointestinal disease cholera. TCP is a type IV pilus that mediates bacterial autoagglutination and colonization of the intestine. TCP is encoded by the tcp operon, which also encodes TcpF, a protein of unknown function that is secreted by V. cholerae in a TCP-dependent manner. Although TcpF is not required for TCP biogenesis, a tcpF mutant has a colonization defect in the infant mouse cholera model that is as severe as a pilus mutant. Furthermore, TcpF antisera protect against V. cholerae infection. TcpF has no apparent sequence homology to any known protein. Here, we report the de novo X-ray crystal structure of TcpF and the identification of an epitope that is critical for its function as a colonization factor. A monoclonal antibody recognizing this epitope is protective against V. cholerae challenge and adds to the protection provided by an anti-TcpA antibody. These data suggest that TcpF has a novel function in V. cholerae colonization and define a region crucial for this function.


    Organizational Affiliation

    Department of Microbiology and Immunology, Dartmouth Medical School, Hanover, NH 03755, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Toxin coregulated pilus biosynthesis protein F
A
318Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)Mutation(s): 0 
Gene Names: tcpF
Find proteins for P0C6Q5 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  P0C6Q5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.229 
  • Space Group: F 4 3 2
Unit Cell:
Length (Å)Angle (°)
a = 224.880α = 90.00
b = 224.880β = 90.00
c = 224.880γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
HKL-2000data collection
XSCALEdata scaling
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance