3GZ1

Crystal structure of IpgC in complex with the chaperone binding region of IpaB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

IpaB-IpgC interaction defines binding motif for type III secretion translocator

Lunelli, M.Lokareddy, R.K.Zychlinsky, A.Kolbe, M.

(2009) Proc.Natl.Acad.Sci.USA 106: 9661-9666

  • DOI: 10.1073/pnas.0812900106
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The delivery of virulence factors into host cells through type III secretion systems is essential for enterobacterial pathogenesis. Molecular chaperones bind specifically to virulence factors in the bacterial cytosol before secretion. Invasion plasmi ...

    The delivery of virulence factors into host cells through type III secretion systems is essential for enterobacterial pathogenesis. Molecular chaperones bind specifically to virulence factors in the bacterial cytosol before secretion. Invasion plasmid gene C (IpgC) is a chaperone that binds 2 essential virulence factors of Shigella: invasion plasmid antigens (Ipa) B and C. Here, we report the crystal structure of IpgC alone and in complex with the chaperone binding domain (CBD) of IpaB. The chaperone captures the CBD in an extended conformation that is stabilized by conserved residues lining the cleft. Analysis of the cocrystal structure reveals a sequence motif that is functional in the IpaB translocator class from different bacteria as determined by isothermal titration calorimetry. Our results show how translocators are chaperoned and may allow the design of inhibitors of enterobacterial diseases.


    Organizational Affiliation

    Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Charit├ęplatz 1, 10117 Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chaperone protein ipgC
A, B
151Shigella flexneriMutation(s): 1 
Gene Names: ipgC (ippI)
Find proteins for P0A2U4 (Shigella flexneri)
Go to UniProtKB:  P0A2U4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Invasin ipaB
P, Q
22Shigella flexneriMutation(s): 0 
Gene Names: ipaB
Find proteins for P18011 (Shigella flexneri)
Go to UniProtKB:  P18011
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.200 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 73.310α = 90.00
b = 97.090β = 90.00
c = 106.530γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
PDB_EXTRACTdata extraction
XSCALEdata scaling
XDSdata reduction
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance