2FRH

Crystal Structure of Sara, A Transcription Regulator From Staphylococcus Aureus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.266 
  • R-Value Observed: 0.266 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural and function analyses of the global regulatory protein SarA from Staphylococcus aureus.

Liu, Y.Manna, A.C.Pan, C.H.Kriksunov, I.A.Thiel, D.J.Cheung, A.L.Zhang, G.

(2006) Proc Natl Acad Sci U S A 103: 2392-2397

  • DOI: 10.1073/pnas.0510439103
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The sarA locus in Staphylococcus aureus controls the expression of many virulence genes. The sarA regulatory molecule, SarA, is a 14.7-kDa protein (124 residues) that binds to the promoter region of target genes. Here we report the 2.6 A-resolution x ...

    The sarA locus in Staphylococcus aureus controls the expression of many virulence genes. The sarA regulatory molecule, SarA, is a 14.7-kDa protein (124 residues) that binds to the promoter region of target genes. Here we report the 2.6 A-resolution x-ray crystal structure of the dimeric winged helix SarA protein, which differs from the published SarA structure dramatically. In the crystal packing, multiple dimers of SarA form a scaffold, possibly via divalent cations. Mutations of individual residues within the DNA-binding helix-turn-helix and the winged region as well as within the metal-binding pocket implicate basic residues R84 and R90 within the winged region to be critical in DNA binding, whereas acidic residues D88 and E89 (wing), D8 and E11 (metal-binding pocket), and cysteine 9 are essential for SarA function. These data suggest that the winged region of the winged helix protein participates in DNA binding and activation, whereas the putative divalent cation binding pocket is only involved in gene function.


    Organizational Affiliation

    Integrated Department of Immunology, National Jewish Medical and Research Center, Biomolecular Structure Program and Department of Pharmacology, School of Medicine, University of Colorado Health Science Center, Denver, CO 80206, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Staphylococcal accessory regulator A
A, B
127Staphylococcus aureusMutation(s): 0 
Gene Names: sarA
Find proteins for Q7A1N5 (Staphylococcus aureus (strain MW2))
Go to UniProtKB:  Q7A1N5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.266 
  • R-Value Observed: 0.266 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.338α = 90
b = 65.338β = 90
c = 237.289γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-31
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance