Crystal structure of Staphylococcus aureus protein SarZ in reduced form

Experimental Data Snapshot

  • Resolution: 2.90 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.286 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Crystal structures of the reduced, sulfenic acid, and mixed disulfide forms of SarZ, a redox active global regulator in Staphylococcus aureus.

Poor, C.B.Chen, P.R.Duguid, E.Rice, P.A.He, C.

(2009) J Biol Chem 284: 23517-23524

  • DOI: https://doi.org/10.1074/jbc.M109.015826
  • Primary Citation of Related Structures:  
    3HRM, 3HSE, 3HSR

  • PubMed Abstract: 

    SarZ is a global transcriptional regulator that uses a single cysteine residue, Cys(13), to sense peroxide stress and control metabolic switching and virulence in Staphylococcus aureus. SarZ belongs to the single-cysteine class of OhrR-MgrA proteins that play key roles in oxidative resistance and virulence regulation in various bacteria. We present the crystal structures of the reduced form, sulfenic acid form, and mixed disulfide form of SarZ. Both the sulfenic acid and mixed disulfide forms are structurally characterized for the first time for this class of proteins. The Cys(13) sulfenic acid modification is stabilized through two hydrogen bonds with surrounding residues, and the overall DNA-binding conformation is retained. A further reaction of the Cys(13) sulfenic acid with an external thiol leads to formation of a mixed disulfide bond, which results in an allosteric change in the DNA-binding domains, disrupting DNA binding. Thus, the crystal structures of SarZ in three different states provide molecular level pictures delineating the mechanism by which this class of redox active regulators undergoes activation. These structures help to understand redox-mediated virulence regulation in S. aureus and activation of the MarR family proteins in general.

  • Organizational Affiliation

    Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HTH-type transcriptional regulator sarZ
A, B
140Staphylococcus aureus subsp. aureus str. NewmanMutation(s): 0 
Gene Names: NWMN_2286CNH35_13345
Find proteins for A0A0H3KA72 (Staphylococcus aureus (strain Newman))
Explore A0A0H3KA72 
Go to UniProtKB:  A0A0H3KA72
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H3KA72
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.90 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.286 
  • Space Group: P 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.83α = 90
b = 60.83β = 90
c = 192.81γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
SBC-Collectdata collection
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Refinement description