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 

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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:  
    1JT6, 1JTY, 1JTX, 1JUS, 1JUP, 1JUM

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HYPOTHETICAL TRANSCRIPTIONAL REGULATOR IN QACA 5'REGIONABDE194Staphylococcus aureusMutation(s): 2 
Gene Names: qacRSAP100B_005SAP104C_022
Find proteins for P0A0N4 (Staphylococcus aureus)
Explore P0A0N4 
Go to UniProtKB:  P0A0N4
Protein Feature View
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  • Reference Sequence
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 = 172α = 90
b = 172β = 90
c = 95γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

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