3OC5

Crystal Structure of the vibrio cholerae secreted colonization factor TcpF

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.230 

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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:  
    3OC5, 3OC8

  • 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. TCP is encoded by the tcp operon, which also encodes TcpF, a protein of unknown function that is secreted by V ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Toxin coregulated pilus biosynthesis protein FA318Vibrio choleraeMutation(s): 0 
Gene Names: tcpF, VC_0837
UniProt
Find proteins for P0C6Q5 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Explore P0C6Q5 
Go to UniProtKB:  P0C6Q5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C6Q5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.230 
  • Space Group: F 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 224.88α = 90
b = 224.88β = 90
c = 224.88γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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