Cytosolic disulfide reductase DsbM from Pseudomonas aeruginosa with GSH

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.198 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Crystal structures of the disulfide reductase DsbM from Pseudomonas aeruginosa

Jo, I.Park, N.Chung, I.Y.Cho, Y.H.Ha, N.-C.

(2016) Acta Crystallogr D Struct Biol 72: 1100-1109

  • DOI: https://doi.org/10.1107/S2059798316013024
  • Primary Citation of Related Structures:  
    5HFG, 5HFI

  • PubMed Abstract: 

    In bacteria, many Dsb-family proteins play diverse roles in the conversion between the oxidized and reduced states of cysteine residues of substrate proteins. Most Dsb enzymes catalyze disulfide formation in periplasmic or secreted substrate proteins. Recently, a DsbM protein has been found in a Gram-negative bacterium, and was characterized as a cytosolic Dsb member with the conserved CXXC motif on the basis of sequence homology to the Dsb-family proteins. The protein was implicated in the reduction of the cytoplasmic redox-sensor protein OxyR in Pseudomonas aeruginosa. Here, crystal structures of DsbM from P. aeruginosa are presented, revealing that it consists of a modified thioredoxin domain containing the CXXC motif and a lid domain surrounding the CXXC motif. In a glutathione-linked structure, a glutathione molecule is linked to the CXXC motif of DsbM and is bound in an elongated cavity region in the thioredoxin domain, which is also suited for substrate peptide binding. A striking structural similarity to a human glutathione S-transferase was found in the glutathione-binding pocket. Further, biochemical evidence is presented suggesting that DsbM is directly involved in the reduction of the disulfide of Cys199 and Cys208 in OxyR, resulting in the acceleration of OxyR reduction in the absence of reactive oxygen species stress. These findings may help to expand the understanding of the diverse roles of redox-related proteins that contain the CXXC motif.

  • Organizational Affiliation

    Department of Agricultural Biotechnology, Center for Food Safety and Toxicology, Center for Food and Bioconvergence, Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Uncharacterized protein, cytosolic disulfide reductase DsbM237Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: PA0058
Find proteins for Q9I774 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I774 
Go to UniProtKB:  Q9I774
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9I774
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GSH

Download Ideal Coordinates CCD File 
C10 H17 N3 O6 S
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.198 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.199α = 90
b = 39.199β = 90
c = 236.819γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-26
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.2: 2024-04-03
    Changes: Derived calculations