3RH0

Corynebacterium glutamicum mycothiol/mycoredoxin1-dependent arsenate reductase Cg_ArsC2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Corynebacterium glutamicum survives arsenic stress with arsenate reductases coupled to two distinct redox mechanisms

Villadangos, A.F.Van Belle, K.Wahni, K.Dufe, T.V.Freitas, S.Nur, H.De Galan, S.Gil, J.A.Collet, J.F.Mateos, L.M.Messens, J.

(2011) Mol Microbiol 82: 998-1014

  • DOI: https://doi.org/10.1111/j.1365-2958.2011.07882.x
  • Primary Citation of Related Structures:  
    3RH0, 3T38

  • PubMed Abstract: 

    Arsenate reductases (ArsCs) evolved independently as a defence mechanism against toxic arsenate. In the genome of Corynebacterium glutamicum, there are two arsenic resistance operons (ars1 and ars2) and four potential genes coding for arsenate reductases (Cg_ArsC1, Cg_ArsC2, Cg_ArsC1' and Cg_ArsC4). Using knockout mutants, in vitro reconstitution of redox pathways, arsenic measurements and enzyme kinetics, we show that a single organism has two different classes of arsenate reductases. Cg_ArsC1 and Cg_ArsC2 are single-cysteine monomeric enzymes coupled to the mycothiol/mycoredoxin redox pathway using a mycothiol transferase mechanism. In contrast, Cg_ArsC1' is a three-cysteine containing homodimer that uses a reduction mechanism linked to the thioredoxin pathway with a k(cat)/K(M) value which is 10(3) times higher than the one of Cg_ArsC1 or Cg_ArsC2. Cg_ArsC1' is constitutively expressed at low levels using its own promoter site. It reduces arsenate to arsenite that can then induce the expression of Cg_ArsC1 and Cg_ArsC2. We also solved the X-ray structures of Cg_ArsC1' and Cg_ArsC2. Both enzymes have a typical low-molecular-weight protein tyrosine phosphatases-I fold with a conserved oxyanion binding site. Moreover, Cg_ArsC1' is unique in bearing an N-terminal three-helical bundle that interacts with the active site of the other chain in the dimeric interface.


  • Organizational Affiliation

    Department of Molecular Biology, Area of Microbiology, University of León, León, Spain.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ARSENATE REDUCTASE
A, B
148Corynebacterium glutamicumMutation(s): 0 
Gene Names: arsXCgl0263cg0319
EC: 1.20.4.1
UniProt
Find proteins for P0DKS7 (Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / BCRC 11384 / JCM 1318 / LMG 3730 / NCIMB 10025))
Explore P0DKS7 
Go to UniProtKB:  P0DKS7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DKS7
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
OCS
Query on OCS
A, B
L-PEPTIDE LINKINGC3 H7 N O5 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.35α = 100.6
b = 38.76β = 102.54
c = 43.86γ = 99.94
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-11-30
    Type: Initial release
  • Version 1.1: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.2: 2023-12-06
    Changes: Data collection