1GZS

CRYSTAL STRUCTURE OF THE COMPLEX BETWEEN THE GEF DOMAIN OF THE SALMONELLA TYPHIMURIUM SOPE TOXIN AND HUMAN Cdc42


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for the Reversible Activation of a Rho Protein by the Bacterial Toxin Sope

Buchwald, G.Friebel, A.Galan, J.E.Hardt, W.D.Wittinghofer, A.Scheffzek, K.

(2002) Embo J. 21: 3286

  • DOI: 10.1093/emboj/cdf329

  • PubMed Abstract: 
  • The bacterial enteropathogen Salmonella typhimurium employs a type III secretion system to inject bacterial toxins into the host cell cytosol. These toxins transiently activate Rho family GTP-binding protein-dependent signaling cascades to induce cyt ...

    The bacterial enteropathogen Salmonella typhimurium employs a type III secretion system to inject bacterial toxins into the host cell cytosol. These toxins transiently activate Rho family GTP-binding protein-dependent signaling cascades to induce cytoskeletal rearrangements. One of these translocated Salmonella toxins, SopE, can activate Cdc42 in a Dbl-like fashion despite its lack of sequence similarity to Dbl-like proteins, the Rho-specific eukaryotic guanine nucleotide exchange factors. To elucidate the mechanism of SopE-mediated guanine nucleotide exchange, we have analyzed the structure of the complex between a catalytic fragment of SopE and Cdc42. SopE binds to and locks the switch I and switch II regions of Cdc42 in a conformation that promotes guanine nucleotide release. This conformation is strikingly similar to that of Rac1 in complex with the eukaryotic Dbl-like exchange factor Tiam1. However, the catalytic domain of SopE has an entirely different architecture from that of Tiam1 and interacts with the switch regions via different amino acids. Therefore, SopE represents the first example of a non-Dbl-like protein capable of inducing guanine nucleotide exchange in Rho family proteins.


    Organizational Affiliation

    Max-Planck-Institut für Molekulare Physiologie, Abt. Strukturelle Biologie, Otto-Hahn-Str. 11, D-44227 Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GTP-BINDING PROTEIN
A, C
180Homo sapiensMutation(s): 0 
Gene Names: CDC42
Find proteins for P60953 (Homo sapiens)
Go to Gene View: CDC42
Go to UniProtKB:  P60953
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SOPE
B, D
165Salmonella typhimuriumMutation(s): 0 
Gene Names: sopE
Find proteins for O52623 (Salmonella typhimurium)
Go to UniProtKB:  O52623
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.226 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 87.545α = 90.00
b = 87.545β = 90.00
c = 200.509γ = 120.00
Software Package:
Software NamePurpose
XDSdata scaling
CNSrefinement
CNSphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-09-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance