Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density

Global Symmetry: Tetrahedral - T  (3D View)
Global Stoichiometry: Homo 12-mer - A12 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 35.88 kDa 
• Atom Count: 2296 
• Residue Count: 286 
• Unique protein chains: 1

3OC5

Crystal Structure of the vibrio cholerae secreted colonization factor TcpF

• DOI: 10.2210/pdb3OC5/pdb

• Classification: CELL ADHESION
• Organism(s): Vibrio cholerae
• Expression System: Vibrio cholerae
• Mutation(s): No 


• Deposited: 2010-08-09 Released: 2011-04-20 
• Deposition Author(s): Craig, L., Kolappan, S., Yuen, A.S.W.

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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 

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

• PubMed: 21440558 
• DOI: 10.1016/j.jmb.2011.03.027
• Primary Citation of Related Structures:  
  3OC8, 3OC5


• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Toxin coregulated pilus biosynthesis protein F	A	318	Vibrio cholerae	Mutation(s): 0  Gene Names: tcpF, VC_0837
Find proteins for P0C6Q5 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)) Explore P0C6Q5  Go to UniProtKB:  P0C6Q5

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 = 224.88	α = 90
b = 224.88	β = 90
c = 224.88	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SOLVE	phasing
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-08-09 
• Released Date: 2011-04-20 
Deposition Author(s): Craig, L., Kolappan, S., Yuen, A.S.W.

Revision History 

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