4Q5E

Shigella Effector Kinase OspG bound to E2-Ub UbcH7-Ub Conjugate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Basis for the Inhibition of Host Protein Ubiquitination by Shigella Effector Kinase OspG.

Grishin, A.M.Condos, T.E.Barber, K.R.Campbell-Valois, F.X.Parsot, C.Shaw, G.S.Cygler, M.

(2014) Structure 22: 878-888

  • DOI: https://doi.org/10.1016/j.str.2014.04.010
  • Primary Citation of Related Structures:  
    4Q5E, 4Q5H

  • PubMed Abstract: 

    Shigella invasion of its human host is assisted by T3SS-delivered effector proteins. The OspG effector kinase binds ubiquitin and ubiquitin-loaded E2-conjugating enzymes, including UbcH5b and UbcH7, and attenuates the host innate immune NF-kB signaling. We present the structure of OspG bound to the UbcH7∼Ub conjugate. OspG has a minimal kinase fold lacking the activation loop of regulatory kinases. UbcH7∼Ub binds OspG at sites remote from the kinase active site, yet increases its kinase activity. The ubiquitin is positioned in the "open" conformation with respect to UbcH7 using its I44 patch to interact with the C terminus of OspG. UbcH7 binds to OspG using two conserved loops essential for E3 ligase recruitment. The interaction of the UbcH7∼Ub with OspG is remarkably similar to the interaction of an E2∼Ub with a HECT E3 ligase. OspG interferes with the interaction of UbcH7 with the E3 parkin and inhibits the activity of the E3.


  • Organizational Affiliation

    Department of Biochemistry, University of Saskatchewan, 107 Wiggins Road, Saskatoon, SK S7N 5E5, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein kinase OspG174Shigella sonnei Ss046Mutation(s): 0 
Gene Names: ospGSSON_P170
EC: 2.7
UniProt
Find proteins for Q3YTH2 (Shigella sonnei (strain Ss046))
Explore Q3YTH2 
Go to UniProtKB:  Q3YTH2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ3YTH2
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Polyubiquitin76Saccharomyces cerevisiae S288CMutation(s): 2 
Gene Names: SCD2UBE2L3UBI4YLL039C
EC: 6.3.2.19
UniProt
Find proteins for P0CG63 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P0CG63 
Go to UniProtKB:  P0CG63
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0CG63
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Ubiquitin-conjugating enzyme E2 L3156Homo sapiensMutation(s): 2 
Gene Names: UBCE7UBCH7UBE2L3UBI4
EC: 6.3.2.19
UniProt & NIH Common Fund Data Resources
Find proteins for P68036 (Homo sapiens)
Explore P68036 
Go to UniProtKB:  P68036
PHAROS:  P68036
GTEx:  ENSG00000185651 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68036
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.312α = 90
b = 84.141β = 90
c = 85.367γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-07-02
    Type: Initial release
  • Version 1.1: 2014-07-09
    Changes: Structure summary
  • Version 1.2: 2017-11-22
    Changes: Refinement description