1JTY

Crystal structure of the multidrug binding transcriptional regulator QacR bound to ethidium


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.97 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural mechanisms of QacR induction and multidrug recognition.

Schumacher, M.A.Miller, M.C.Grkovic, S.Brown, M.H.Skurray, R.A.Brennan, R.G.

(2001) Science 294: 2158-2163

  • DOI: 10.1126/science.1066020
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Staphylococcus aureus multidrug binding protein QacR represses transcription of the qacA multidrug transporter gene and is induced by structurally diverse cationic lipophilic drugs. Here, we report the crystal structures of six QacR-drug complexe ...

    The Staphylococcus aureus multidrug binding protein QacR represses transcription of the qacA multidrug transporter gene and is induced by structurally diverse cationic lipophilic drugs. Here, we report the crystal structures of six QacR-drug complexes. Compared to the DNA bound structure, drug binding elicits a coil-to-helix transition that causes induction and creates an expansive multidrug-binding pocket, containing four glutamates and multiple aromatic and polar residues. These structures indicate the presence of separate but linked drug-binding sites within a single protein. This multisite drug-binding mechanism is consonant with studies on multidrug resistance transporters.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Oregon Health & Science University, Portland, OR 97201, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HYPOTHETICAL TRANSCRIPTIONAL REGULATOR IN QACA 5'REGION
B, D, A, E
194Staphylococcus aureusMutation(s): 2 
Gene Names: qacR
Find proteins for P0A0N4 (Staphylococcus aureus)
Go to UniProtKB:  P0A0N4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, D, E
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ET
Query on ET

Download SDF File 
Download CCD File 
A
ETHIDIUM
C21 H20 N3
QTANTQQOYSUMLC-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.97 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.239 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 172.000α = 90.00
b = 172.000β = 90.00
c = 95.000γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
CNSrefinement
CNSphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-12
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance