1HSJ

SARR MBP FUSION STRUCTURE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.263 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of the SarR protein from Staphylococcus aureus.

Liu, Y.Manna, A.Li, R.Martin, W.E.Murphy, R.C.Cheung, A.L.Zhang, G.

(2001) Proc.Natl.Acad.Sci.USA 98: 6877-6882

  • DOI: 10.1073/pnas.121013398

  • PubMed Abstract: 
  • The expression of virulence determinants in Staphylococcus aureus is controlled by global regulatory loci (e.g., sarA and agr). The sar (Staphylococcus accessory regulator) locus is composed of three overlapping transcripts (sarA P1, P3, and P2, tran ...

    The expression of virulence determinants in Staphylococcus aureus is controlled by global regulatory loci (e.g., sarA and agr). The sar (Staphylococcus accessory regulator) locus is composed of three overlapping transcripts (sarA P1, P3, and P2, transcripts initiated from the P1, P3, and P2 promoters, respectively), all encoding the 124-aa SarA protein. The level of SarA, the major regulatory protein, is partially controlled by the differential activation of the sarA promoters. We previously partially purified a 13.6-kDa protein, designated SarR, that binds to the sarA promoter region to down-modulate sarA transcription from the P1 promoter and subsequently SarA expression. SarR shares sequence similarity to SarA, and another SarA homolog, SarS. Here we report the 2.3 A-resolution x-ray crystal structure of the dimeric SarR-MBP (maltose binding protein) fusion protein. The structure reveals that the SarR protein not only has a classic helix-turn-helix module for DNA binding at the major grooves, but also has an additional loop region involved in DNA recognition at the minor grooves. This interaction mode could represent a new functional class of the "winged helix" family. The dimeric SarR structure could accommodate an unusually long stretch of approximately 27 nucleotides with two or four bending points along the course, which could lead to the bending of DNA by 90 degrees or more, similar to that seen in the catabolite activator protein (CAP)-DNA complex. The structure also demonstrates the molecular basis for the stable dimerization of the SarR monomers and possible motifs for interaction with other proteins.


    Organizational Affiliation

    National Jewish Medical and Research Center and Departments of Immunology and Pharmacology, School of Medicine, University of Colorado Health Science Center, 1400 Jackson Street, Denver, CO 80206, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FUSION PROTEIN CONSISTING OF STAPHYLOCOCCUS ACCESSORY REGULATOR PROTEIN R AND MALTOSE BINDING PROTEIN
A, B
487Staphylococcus aureus (strain NCTC 8325)Escherichia coli (strain K12)
This entity is chimeric
Gene Names: sarR, malE
Find proteins for Q9F0R1 (Staphylococcus aureus (strain NCTC 8325))
Go to UniProtKB:  Q9F0R1
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEX9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLC
Query on GLC

Download SDF File 
Download CCD File 
A, B
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.263 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 64.739α = 65.72
b = 70.639β = 67.18
c = 75.473γ = 69.58
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2000-12-26 
  • Released Date: 2001-06-06 
  • Deposition Author(s): Zhang, G.

Revision History 

  • Version 1.0: 2001-06-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-06-28
    Type: Database references, Source and taxonomy