2BV6

Crystal structure of MgrA, a global regulator and major virulence determinant in Staphylococcus aureus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.250 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

An Oxidation-Sensing Mechanism is Used by the Global Regulator Mgra in Staphylococcus Aureus.

Chen, P.R.Bae, T.Williams, W.A.Duguid, E.M.Rice, P.A.Schneewind, O.He, C.

(2006) Nat Chem Biol 2: 591

  • DOI: 10.1038/nchembio820
  • Primary Citation of Related Structures:  
    2BV6

  • PubMed Abstract: 
  • Staphylococcus aureus is a human pathogen responsible for most wound and hospital-acquired infections. The protein MgrA is both an important virulence determinant during infection and a regulator of antibiotic resistance in S. aureus. The crystal structure of the MgrA homodimer, solved at 2 ...

    Staphylococcus aureus is a human pathogen responsible for most wound and hospital-acquired infections. The protein MgrA is both an important virulence determinant during infection and a regulator of antibiotic resistance in S. aureus. The crystal structure of the MgrA homodimer, solved at 2.86 A, indicates the presence of a unique cysteine residue located at the interface of the protein dimer. We discovered that this cysteine residue can be oxidized by various reactive oxygen species, such as hydrogen peroxide and organic hydroperoxide. Cysteine oxidation leads to dissociation of MgrA from DNA and initiation of signaling pathways that turn on antibiotic resistance in S. aureus. The oxidation-sensing mechanism is typically used by bacteria to counter challenges of reactive oxygen and nitrogen species. Our study reveals that in S. aureus, MgrA adopts a similar mechanism but uses it to globally regulate different defensive pathways.


    Organizational Affiliation

    Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HTH-TYPE TRANSCRIPTIONAL REGULATOR MGRAA142Staphylococcus aureusMutation(s): 0 
Gene Names: mgrAmgr
Find proteins for P0C1S0 (Staphylococcus aureus)
Explore P0C1S0 
Go to UniProtKB:  P0C1S0
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.250 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.8α = 90
b = 119.8β = 90
c = 62.3γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-09-20
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance