3BNV

Crystal structure of Cj0977, a sigma28-regulated virulence protein from Campylobacter jejuni.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of a sigma28-regulated nonflagellar virulence protein from Campylobacter jejuni.

Yokoyama, T.Paek, S.Ewing, C.P.Guerry, P.Yeo, H.J.

(2008) J.Mol.Biol. 384: 364-376

  • DOI: 10.1016/j.jmb.2008.09.036

  • PubMed Abstract: 
  • Campylobacter jejuni, a Gram-negative motile bacterium, is a leading cause of human gastrointestinal infections. Although the mechanism of C.jejuni-mediated enteritis appears to be multifactorial, flagella play complex roles in the virulence of this ...

    Campylobacter jejuni, a Gram-negative motile bacterium, is a leading cause of human gastrointestinal infections. Although the mechanism of C.jejuni-mediated enteritis appears to be multifactorial, flagella play complex roles in the virulence of this human pathogen. Cj0977 is a recently identified virulence factor in C. jejuni and is expressed by a sigma(28) promoter that controls late genes in the flagellar regulon. A Cj0977 mutant strain is fully motile but significantly reduced in the invasion of intestinal epithelial cells in vitro. Here, we report the crystal structure of the major structural domain of Cj0977, which reveals a homodimeric "hot-dog" fold architecture. Of note, the characteristic hot-dog fold has been found in various coenzyme A (CoA) compound binding proteins with numerous oligomeric states. Structural comparison with other known hot-dog fold proteins locates a putative binding site for an acyl-CoA compound in the Cj0977 protein. Structure-based site-directed mutagenesis followed by invasion assays indicates that key residues in the putative binding site are indeed essential for the Cj0977 virulence function, suggesting a possible function of Cj0977 as an acyl-CoA binding regulatory protein.


    Organizational Affiliation

    Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cj0977
A, B, C, D, E, F, G, H
152Campylobacter jejuniMutation(s): 0 
Find proteins for Q0R4E3 (Campylobacter jejuni)
Go to UniProtKB:  Q0R4E3
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F, G, H
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.213 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 79.876α = 90.00
b = 94.533β = 99.32
c = 81.818γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-3000data collection
SCALEPACKdata scaling
HKL-3000data reduction
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance