3HSR

Crystal structure of Staphylococcus aureus protein SarZ in mixed disulfide form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

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

  • Primary Citation of Related Structures:  

  • 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 ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HTH-type transcriptional regulator sarZ
A, B, C, D
140Staphylococcus aureus (strain Newman)Mutation(s): 0 
Find proteins for A0A0H3KA72 (Staphylococcus aureus (strain Newman))
Go to UniProtKB:  A0A0H3KA72
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download SDF File 
Download CCD File 
A, B, C, D
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B, C, D
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BT6
Query on BT6

Download SDF File 
Download CCD File 
A, C, D
benzenethiol
C6 H6 S
RMVRSNDYEFQCLF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.196 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 38.240α = 64.40
b = 62.840β = 75.81
c = 67.200γ = 82.58
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
PHASERphasing
DENZOdata reduction
HKL-2000data reduction
Blu-Icedata collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Source and taxonomy, Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description