1LJU

X-RAY STRUCTURE OF C15A ARSENATE REDUCTASE FROM PI258 COMPLEXED WITH ARSENITE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.241 
  • R-Value Observed: 0.260 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

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: 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 ...

    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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
arsenate reductaseA131Staphylococcus aureusMutation(s): 2 
Gene Names: arsC
EC: 1.97.1.5 (PDB Primary Data), 1.20.4.4 (UniProt)
Find proteins for P0A006 (Staphylococcus aureus)
Explore P0A006 
Go to UniProtKB:  P0A006
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSR
Query on CSR
AL-PEPTIDE LINKINGC3 H8 As N O5 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.241 
  • R-Value Observed: 0.260 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.97α = 90
b = 37.83β = 90
c = 106.37γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • 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