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: 2.30 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 

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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
  • Primary Citation of Related Structures:  
    1GZS

  • 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 cytoskeletal rearrangements ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTP-BINDING PROTEINA, C180Homo sapiensMutation(s): 0 
Gene Names: CDC42
EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P60953 (Homo sapiens)
Explore P60953 
Go to UniProtKB:  P60953
PHAROS:  P60953
GTEx:  ENSG00000070831 
Entity Groups  
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UniProt GroupP60953
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SOPEB, D165Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: sopE
UniProt
Find proteins for O52623 (Salmonella typhimurium)
Explore O52623 
Go to UniProtKB:  O52623
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO52623
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.545α = 90
b = 87.545β = 90
c = 200.509γ = 120
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XDSdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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