1G4W

CRYSTAL STRUCTURE OF THE SALMONELLA TYROSINE PHOSPHATASE AND GTPASE ACTIVATING PROTEIN SPTP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.260 
  • R-Value Observed: 0.260 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Modulation of host signaling by a bacterial mimic: structure of the Salmonella effector SptP bound to Rac1.

Stebbins, C.E.Galan, J.E.

(2000) Mol Cell 6: 1449-1460

  • DOI: 10.1016/s1097-2765(00)00141-6
  • Primary Citation of Related Structures:  
    1G4U, 1G4W

  • PubMed Abstract: 
  • Salmonella spp. utilize a specialized protein secretion system to deliver a battery of effector proteins into host cells. Several of these effectors stimulate Cdc42- and Rac1-dependent cytoskeletal changes that promote bacterial internalization. These potentially cytotoxic alterations are rapidly reversed by the effector SptP, a tyrosine phosphatase and GTPase activating protein (GAP) that targets Cdc42 and Rac1 ...

    Salmonella spp. utilize a specialized protein secretion system to deliver a battery of effector proteins into host cells. Several of these effectors stimulate Cdc42- and Rac1-dependent cytoskeletal changes that promote bacterial internalization. These potentially cytotoxic alterations are rapidly reversed by the effector SptP, a tyrosine phosphatase and GTPase activating protein (GAP) that targets Cdc42 and Rac1. The 2.3 A resolution crystal structure of an SptP-Rac1 transition state complex reveals an unusual GAP architecture that mimics host functional homologs. The phosphatase domain possesses a conserved active site but distinct surface properties. Binding to Rac1 induces a dramatic stabilization in SptP of a four-helix bundle that makes extensive contacts with the Switch I and Switch II regions of the GTPase.


    Organizational Affiliation

    Section of Microbial Pathogenesis, Boyer Center for Molecular Medicine, Yale School of Medicine, New Haven, CT 06536, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN TYROSINE PHOSPHATASE SPTPA [auth R]383Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: sptP
EC: 3.1.3.48
UniProt
Find proteins for P74873 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P74873 
Go to UniProtKB:  P74873
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP74873
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.260 
  • R-Value Observed: 0.260 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.966α = 90
b = 153.611β = 90
c = 175.465γ = 90
Software Package:
Software NamePurpose
SHARPphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-01-24
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection