Disulfide intermediate of C89L Arsenate reductase from pI258

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


All intermediates of the arsenate reductase mechanism, including an intramolecular dynamic disulfide cascade.

Messens, J.Martins, J.C.Van Belle, K.Brosens, E.Desmyter, A.De Gieter, M.Wieruszeski, J.M.Willem, R.Wyns, L.Zegers, I.

(2002) Proc Natl Acad Sci U S A 99: 8506-8511

  • DOI: https://doi.org/10.1073/pnas.132142799
  • Primary Citation of Related Structures:  
    1LJL, 1LJU, 1LK0

  • PubMed Abstract: 

    The mechanism of pI258 arsenate reductase (ArsC) catalyzed arsenate reduction, involving its P-loop structural motif and three redox active cysteines, has been unraveled. All essential intermediates are visualized with x-ray crystallography, and NMR is used to map dynamic regions in a key disulfide intermediate. Steady-state kinetics of ArsC mutants gives a view of the crucial residues for catalysis. ArsC combines a phosphatase-like nucleophilic displacement reaction with a unique intramolecular disulfide bond cascade. Within this cascade, the formation of a disulfide bond triggers a reversible "conformational switch" that transfers the oxidative equivalents to the surface of the protein, while releasing the reduced substrate.

  • Organizational Affiliation

    Dienst Ultrastructuur, Vlaams interuniversitair Instituut voor Biotechnologie, Vrije Universiteit Brussel, Paardenstraat 65, 1640 St. Genesius-Rode, Belgium. jmessens@vub.ac.be

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
arsenate reductase
A, B
131Staphylococcus aureusMutation(s): 1 
Gene Names: arsc
Find proteins for P0A006 (Staphylococcus aureus)
Explore P0A006 
Go to UniProtKB:  P0A006
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A006
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.210 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.71α = 90
b = 35.48β = 118.01
c = 62.98γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-08-07
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2023-08-16
    Changes: Data collection, Refinement description