3GBG

Crystal Structure of ToxT from Vibrio Cholerae O395

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 

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This is version 1.1 of the entry. See complete history. 


Literature

Structure of Vibrio cholerae ToxT reveals a mechanism for fatty acid regulation of virulence genes.

Lowden, M.J., Skorupski, K., Pellegrini, M., Chiorazzo, M.G., Taylor, R.K., Kull, F.J.

(2010) Proc Natl Acad Sci U S A 107: 2860-2865

  • DOI: 10.1073/pnas.0915021107
  • Primary Citation of Related Structures:  
    3GBG

  • PubMed Abstract: 

    • Cholera is an acute intestinal infection caused by the bacterium Vibrio cholerae. In order for V. cholerae to cause disease, it must produce two virulence factors, the toxin-coregulated pilus (TCP) and cholera toxin (CT), whose expression is controlled by a transcriptional cascade culminating with the expression of the AraC-family regulator, ToxT ...

    Cholera is an acute intestinal infection caused by the bacterium Vibrio cholerae. In order for V. cholerae to cause disease, it must produce two virulence factors, the toxin-coregulated pilus (TCP) and cholera toxin (CT), whose expression is controlled by a transcriptional cascade culminating with the expression of the AraC-family regulator, ToxT. We have solved the 1.9 A resolution crystal structure of ToxT, which reveals folds in the N- and C-terminal domains that share a number of features in common with AraC, MarA, and Rob as well as the unexpected presence of a buried 16-carbon fatty acid, cis-palmitoleate. The finding that cis-palmitoleic acid reduces TCP and CT expression in V. cholerae and prevents ToxT from binding to DNA in vitro provides a direct link between the host environment of V. cholerae and regulation of virulence gene expression.

    Organizational Affiliation: 

    Department of Chemistry, Dartmouth College, 6128 Burke Laboratory, Hanover, NH 03755, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TCP pilus virulence regulatory proteinA276Vibrio cholerae O395Mutation(s): 0 
Gene Names: tcpN, toxT, VC0395_A0363, VC395_0854
UniProt
Find proteins for A5F384 (Vibrio cholerae serotype O1 (strain ATCC 39541 / Classical Ogawa 395 / O395))
Explore A5F384 
Go to UniProtKB:  A5F384
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PAM
Query on PAM
Download Ideal Coordinates CCD File 
 B [auth A]PALMITOLEIC ACID
C16 H30 O2
SECPZKHBENQXJG-FPLPWBNLSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.311α = 90
b = 77.739β = 90
c = 83.568γ = 90
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance