1FZP

CRYSTAL STRUCTURES OF SARA: A PLEIOTROPIC REGULATOR OF VIRULENCE GENES IN S. AUREUS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of SarA, a pleiotropic regulator of virulence genes in S. aureus.

Schumacher, M.A.Hurlburt, B.K.Brennan, R.G.

(2001) Nature 409: 215-219

  • DOI: 10.1038/35051623
  • Also Cited By: 1FZN

  • PubMed Abstract: 
  • Staphylococcus aureus is a major human pathogen, the potency of which can be attributed to the regulated expression of an impressive array of virulence determinants. A key pleiotropic transcriptional regulator of these virulence factors is SarA, whic ...

    Staphylococcus aureus is a major human pathogen, the potency of which can be attributed to the regulated expression of an impressive array of virulence determinants. A key pleiotropic transcriptional regulator of these virulence factors is SarA, which is encoded by the sar (staphylococcal accessory regulator) locus. SarA was characterized initially as an activator of a second virulence regulatory locus, agr, through its interaction with a series of heptad repeats (AGTTAAG) within the agr promoter. Subsequent DNA-binding studies have revealed that SarA binds readily to multiple AT-rich sequences of variable lengths. Here we describe the crystal structure of SarA and a SarA-DNA complex at resolutions of 2.50 A and 2.95 A, respectively. SarA has a fold consisting of a four-helix core region and 'inducible regions' comprising a beta-hairpin and a carboxy-terminal loop. On binding DNA, the inducible regions undergo marked conformational changes, becoming part of extended and distorted alpha-helices, which encase the DNA. SarA recognizes an AT-rich site in which the DNA is highly overwound and adopts a D-DNA-like conformation by indirect readout. These structures thus provide insight into SarA-mediated transcription regulation.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Oregon Health Sciences University, Portland 97201-3098, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
STAPHYLOCOCCAL ACCESSORY REGULATOR A
D, B
123Staphylococcus aureusGene Names: sarA
Find proteins for P0C1U6 (Staphylococcus aureus)
Go to UniProtKB:  P0C1U6
Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(P*AP*TP*AP*TP*AP*TP*A)-3'W,K7N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
B, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.220 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 54.500α = 90.00
b = 65.200β = 118.00
c = 57.800γ = 90.00
Software Package:
Software NamePurpose
TNTrefinement
SDMSdata scaling
PHASESphasing
SDMSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-01-22
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance