5HFI

Cytosolic disulfide reductase DsbM from Pseudomonas aeruginosa with GSH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.801 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

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:  

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein, cytosolic disulfide reductase DsbM
A
237Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Find proteins for Q9I774 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9I774
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSH
Query on GSH

Download SDF File 
Download CCD File 
A
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.801 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.193 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 39.199α = 90.00
b = 39.199β = 90.00
c = 236.819γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
MOLREPphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



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