3GBG

Crystal Structure of ToxT from Vibrio Cholerae O395


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


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.USA 107: 2860-2865

  • DOI: 10.1073/pnas.0915021107

  • 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 controll ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TCP pilus virulence regulatory protein
A
276Vibrio cholerae serotype O1 (strain ATCC 39541 / Classical Ogawa 395 / O395)Mutation(s): 0 
Gene Names: tcpN (toxT)
Find proteins for A5F384 (Vibrio cholerae serotype O1 (strain ATCC 39541 / Classical Ogawa 395 / O395))
Go to UniProtKB:  A5F384
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PAM
Query on PAM

Download SDF File 
Download CCD File 
A
PALMITOLEIC ACID
C16 H30 O2
SECPZKHBENQXJG-FPLPWBNLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 39.311α = 90.00
b = 77.739β = 90.00
c = 83.568γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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