Crystal Structure of Salmonella enterica serovar Typhimurium DsbA

Experimental Data Snapshot

  • Resolution: 1.58 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.145 
  • R-Value Observed: 0.147 

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Structural and functional characterization of three DsbA paralogues from Salmonella enterica serovar typhimurium

Heras, B.Totsika, M.Jarrott, R.Shouldice, S.R.Guncar, G.Achard, M.E.S.Wells, T.J.Argente, M.P.McEwan, A.G.Schembri, M.A.

(2010) J Biol Chem 285: 18423-18432

  • DOI: https://doi.org/10.1074/jbc.M110.101360
  • Primary Citation of Related Structures:  
    3L9S, 3L9U, 3L9V

  • PubMed Abstract: 

    In prototypic Escherichia coli K-12 the introduction of disulfide bonds into folding proteins is mediated by the Dsb family of enzymes, primarily through the actions of the highly oxidizing protein EcDsbA. Homologues of the Dsb catalysts are found in most bacteria. Interestingly, pathogens have developed distinct Dsb machineries that play a pivotal role in the biogenesis of virulence factors, hence contributing to their pathogenicity. Salmonella enterica serovar (sv.) Typhimurium encodes an extended number of sulfhydryl oxidases, namely SeDsbA, SeDsbL, and SeSrgA. Here we report a comprehensive analysis of the sv. Typhimurium thiol oxidative system through the structural and functional characterization of the three Salmonella DsbA paralogues. The three proteins share low sequence identity, which results in several unique three-dimensional characteristics, principally in areas involved in substrate binding and disulfide catalysis. Furthermore, the Salmonella DsbA-like proteins also have different redox properties. Whereas functional characterization revealed some degree of redundancy, the properties of SeDsbA, SeDsbL, and SeSrgA and their expression pattern in sv. Typhimurium indicate a diverse role for these enzymes in virulence.

  • Organizational Affiliation

    Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia. b.heras@imb.uq.edu.au

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thiol:disulfide interchange protein191Salmonella enterica subsp. enterica serovar Typhimurium str. SL1344Mutation(s): 0 
Gene Names: dsbASTM3997
Find proteins for P0A2H9 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0A2H9 
Go to UniProtKB:  P0A2H9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A2H9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.58 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.145 
  • R-Value Observed: 0.147 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.377α = 90
b = 61.837β = 101.32
c = 42.951γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
Blu-Icedata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Refinement description