2QZA

Crystal structure of Salmonella effector protein SopA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.270 
  • R-Value Observed: 0.271 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal structure of SopA, a Salmonella effector protein mimicking a eukaryotic ubiquitin ligase.

Diao, J.Zhang, Y.Huibregtse, J.M.Zhou, D.Chen, J.

(2008) Nat Struct Mol Biol 15: 65-70

  • DOI: 10.1038/nsmb1346
  • Primary Citation of Related Structures:  
    2QYU, 2QZA

  • PubMed Abstract: 
  • Bacterial pathogens deliver virulence proteins into host cells to facilitate entry and survival. Salmonella SopA functions as an E3 ligase to manipulate the host proinflammatory response. Here we report the crystal structure of SopA in two conformations. Although it has little sequence similarity to eukaryotic HECT-domain E3s, the C-terminal half of SopA has a bilobal architecture that is reminiscent of the N- and C-lobe arrangement of HECT domains ...

    Bacterial pathogens deliver virulence proteins into host cells to facilitate entry and survival. Salmonella SopA functions as an E3 ligase to manipulate the host proinflammatory response. Here we report the crystal structure of SopA in two conformations. Although it has little sequence similarity to eukaryotic HECT-domain E3s, the C-terminal half of SopA has a bilobal architecture that is reminiscent of the N- and C-lobe arrangement of HECT domains. The SopA structure also contains a putative substrate-binding domain located near the E2-binding site. The two structures of SopA differ in the relative orientations of the C lobe, indicating that SopA possesses the conformational flexibility essential for HECT E3 function. These results suggest that SopA is a unique HECT E3 ligase evolved from the coevolutionary selective pressure at the bacterium-host interface.


    Related Citations: 
    • The inflammation-associated Salmonella SopA is a HECT-like E3 ubiquitin ligase
      Zhang, Y., Higashide, W.M., McCormick, B., Chen, J., Zhou, D.
      (2006) Mol Microbiol 62: 786

    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Secreted effector proteinA, B618Salmonella enterica subsp. enterica serovar Typhimurium str. SL1344Mutation(s): 0 
Gene Names: sopA
EC: 2.3.2.26
UniProt
Find proteins for Q8ZNR3 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore Q8ZNR3 
Go to UniProtKB:  Q8ZNR3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8ZNR3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.270 
  • R-Value Observed: 0.271 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.732α = 90
b = 68.536β = 90.9
c = 106.613γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
SHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance