3HCJ

Structure of MsrB from Xanthomonas campestris (oxidized form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Methionine Sulfoxide Reductase B Displays a High Level of Flexibility.

Ranaivoson, F.M.Neiers, F.Kauffmann, B.Boschi-Muller, S.Branlant, G.Favier, F.

(2009) J.Mol.Biol. --: --

  • DOI: 10.1016/j.jmb.2009.08.073
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Methionine sulfoxide reductases (Msrs) are enzymes that catalyze the reduction of methionine sulfoxide back to methionine. In vivo, Msrs are essential in the protection of cells against oxidative damage to proteins and in the virulence of some bacter ...

    Methionine sulfoxide reductases (Msrs) are enzymes that catalyze the reduction of methionine sulfoxide back to methionine. In vivo, Msrs are essential in the protection of cells against oxidative damage to proteins and in the virulence of some bacteria. Two structurally unrelated classes of Msrs, named MsrA and MsrB, exist. MsrB are stereospecific to R epimer on the sulfur of sulfoxide. All MsrB share a common reductase step with the formation of a sulfenic acid intermediate. For the subclass of MsrB whose recycling process passes through the formation of an intradisulfide bond, the recycling reducer is thioredoxin. In the present study, X-ray structures of Neisseria meningitidis MsrB have been determined. The structures have a fold based on two beta-sheets, similar to the fold already described for other MsrB, with the recycling Cys63 located in a position favorable for disulfide bond formation with the catalytic Cys117. X-ray structures of Xanthomonas campestris MsrB have also been determined. In the C117S MsrB structure with a bound substrate, the recycling Cys31 is far from Ser117, with Trp65 being essential in the reductase step located in between. This positioning prevents the formation of the Cys31-Cys117 disulfide bond. In the oxidized structure, a drastic conformational reorganization of the two beta-sheets due to withdrawal of the Trp65 region from the active site, which remains compatible with an efficient thioredoxin-recycling process, is observed. The results highlight the remarkable structural malleability of the MsrB fold.


    Organizational Affiliation

    CRM2, Equipe Biocristallographie, UMR 7036 CNRS-UHP, Institut Jean Barriol, Nancy Université, Faculté des Sciences et Techniques, BP 70239, 54506 Vandoeuvre-les-Nancy, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Peptide methionine sulfoxide reductase
A, B
154Xanthomonas campestris pv. campestris (strain ATCC 33913 / DSM 3586 / NCPPB 528 / LMG 568 / P 25)Mutation(s): 0 
Gene Names: msrB
EC: 1.8.4.12
Find proteins for Q8P4Q6 (Xanthomonas campestris pv. campestris (strain ATCC 33913 / DSM 3586 / NCPPB 528 / LMG 568 / P 25))
Go to UniProtKB:  Q8P4Q6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 44.197α = 90.00
b = 65.303β = 94.81
c = 57.957γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction
SHELXDphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance