3BCI

Crystal Structure of Staphylococcus aureus DsbA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Staphylococcus aureus DsbA Does Not Have a Destabilizing Disulfide: A NEW PARADIGM FOR BACTERIAL OXIDATIVE FOLDING

Heras, B.Kurz, M.Jarrott, R.Shouldice, S.R.Frei, P.Robin, G.Cemazar, M.Thony-Meyer, L.Glockshuber, R.Martin, J.L.

(2008) J.Biol.Chem. 283: 4261-4271

  • DOI: 10.1074/jbc.M707838200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In Gram-negative bacteria, the introduction of disulfide bonds into folding proteins occurs in the periplasm and is catalyzed by donation of an energetically unstable disulfide from DsbA, which is subsequently re-oxidized through interaction with Dsb ...

    In Gram-negative bacteria, the introduction of disulfide bonds into folding proteins occurs in the periplasm and is catalyzed by donation of an energetically unstable disulfide from DsbA, which is subsequently re-oxidized through interaction with DsbB. Gram-positive bacteria lack a classic periplasm but nonetheless encode Dsb-like proteins. Staphylococcus aureus encodes just one Dsb protein, a DsbA, and no DsbB. Here we report the crystal structure of S. aureus DsbA (SaDsbA), which incorporates a thioredoxin fold with an inserted helical domain, like its Escherichia coli counterpart EcDsbA, but it lacks the characteristic hydrophobic patch and has a truncated binding groove near the active site. These findings suggest that SaDsbA has a different substrate specificity than EcDsbA. Thermodynamic studies indicate that the oxidized and reduced forms of SaDsbA are energetically equivalent, in contrast to the energetically unstable disulfide form of EcDsbA. Further, the partial complementation of EcDsbA by SaDsbA is independent of EcDsbB and biochemical assays show that SaDsbA does not interact with EcDsbB. The identical stabilities of oxidized and reduced SaDsbA may facilitate direct re-oxidation of the protein by extracellular oxidants, without the need for DsbB.


    Related Citations: 
    • Expression and crystallization of DsbA from Staphylococcus aureus
      Heras, B.,Kurz, M.,Jarrott, R.,Byriel, K.A.,Jones, A.,Thony-Meyer, L.,Martin, J.L.
      (2007) Acta Crystallogr.,Sect.F 63: 953


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Disulfide bond protein A
A
186Staphylococcus aureusGene Names: dsbA (bdbD)
Find proteins for Q9EYL5 (Staphylococcus aureus)
Go to UniProtKB:  Q9EYL5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.198 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 72.099α = 90.00
b = 72.099β = 90.00
c = 92.098γ = 120.00
Software Package:
Software NamePurpose
CrystalCleardata collection
d*TREKdata reduction
PDB_EXTRACTdata extraction
d*TREKdata scaling
CNSrefinement
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance