Crystal Structure of Pseudomonas aeruginosa DsbA

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.152 
  • R-Value Work: 0.110 
  • R-Value Observed: 0.112 

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Characterization of the DsbA Oxidative Folding Catalyst from Pseudomonas aeruginosa Reveals a Highly Oxidizing Protein that Binds Small Molecules.

Shouldice, S.R.Heras, B.Jarrott, R.Sharma, P.Scanlon, M.J.Martin, J.L.

(2010) Antioxid Redox Signal 12: 921-931

  • DOI: https://doi.org/10.1089/ars.2009.2736
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Bacterial antibiotic resistance is an emerging global crisis, and treatment of multidrug-resistant gram-negative infections, particularly those caused by the opportunistic human pathogen Pseudomonas aeruginosa, remains a major challenge. This problem is compounded by a lack of new antibiotics in the development pipeline: only two new classes have been developed since the 1960s, and both are indicated for multidrug-resistant gram-positive infections. A promising new approach to combat antibiotic resistance is by targeting bacterial virulence, rather than bacterial viability. The bacterial periplasmic protein DsbA represents a central point for antivirulence intervention because its oxidoreductase activity is essential for the folding and function of almost all exported virulence factors. Here we describe the three-dimensional structure of this DsbA target from P. aeruginosa, and we establish for the first time that a member of this enzyme family is capable of binding small molecules. We also describe biochemical assays that validate the redox activity of PaDsbA. Together, the structural and functional characterization of PaDsbA provides the basis for future studies aimed at designing a new class of antivirulence compounds to combat antibiotic-resistant P. aeruginosa infection.

  • Organizational Affiliation

    The University of Queensland, Institute for Molecular Bioscience , Division of Chemistry and Structural Biology, Brisbane, Queensland, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thiol:disulfide interchange protein dsbA192Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: dsbAPA5489
Find proteins for P0C2B2 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore P0C2B2 
Go to UniProtKB:  P0C2B2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C2B2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.152 
  • R-Value Work: 0.110 
  • R-Value Observed: 0.112 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.155α = 90
b = 41.155β = 90
c = 98.318γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description