5HFG

Cytosolic disulfide reductase DsbM from Pseudomonas aeruginosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

wwPDB Validation 3D Report Full Report



Literature

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: 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 ...

    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.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Uncharacterized protein, cytosolic disulfide reductase DsbMA238Pseudomonas 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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.808α = 90
b = 38.808β = 90
c = 233.482γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DENZOdata reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2016-01-07 
  • Released Date: 2016-10-26 
  • Deposition Author(s): Jo, I., Ha, N.-C.

Revision History 

  • Version 1.0: 2016-10-26
    Type: Initial release