2BOW

MULTIDRUG-BINDING DOMAIN OF TRANSCRIPTION ACTIVATOR BMRR IN COMPLEX WITH A LIGAND, TETRAPHENYLPHOSPHONIUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.320 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of multidrug recognition by BmrR, a transcription activator of a multidrug transporter.

Zheleznova, E.E.Markham, P.N.Neyfakh, A.A.Brennan, R.G.

(1999) Cell 96: 353-362

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Multidrug-efflux transporters demonstrate an unusual ability to recognize multiple structurally dissimilar toxins. A comparable ability to bind diverse hydrophobic cationic drugs is characteristic of the Bacillus subtilis transcription regulator BmrR ...

    Multidrug-efflux transporters demonstrate an unusual ability to recognize multiple structurally dissimilar toxins. A comparable ability to bind diverse hydrophobic cationic drugs is characteristic of the Bacillus subtilis transcription regulator BmrR, which upon drug binding activates expression of the multidrug transporter Bmr. Crystal structures of the multidrug-binding domain of BmrR (2.7 A resolution) and of its complex with the drug tetraphenylphosphonium (2.8 A resolution) revealed a drug-induced unfolding and relocation of an alpha helix, which exposes an internal drug-binding pocket. Tetraphenylphosphonium binding is mediated by stacking and van der Waals contacts with multiple hydrophobic residues of the pocket and by an electrostatic interaction between the positively charged drug and a buried glutamate residue, which is the key to cation selectivity. Similar binding principles may be used by other multidrug-binding proteins.


    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: 1
MoleculeChainsSequence LengthOrganismDetails
MULTIDRUG-EFFLUX TRANSPORTER 1 REGULATOR BMRR
A
159Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: bmrR (bmr1R)
Find proteins for P39075 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P39075
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
P4P
Query on P4P

Download SDF File 
Download CCD File 
A
TETRAPHENYLPHOSPHONIUM
C24 H20 P
USFPINLPPFWTJW-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
P4PKd: 100000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.320 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 82.600α = 90.00
b = 82.600β = 90.00
c = 104.200γ = 120.00
Software Package:
Software NamePurpose
EPMRphasing
BIOTEXdata scaling
BIOTEXdata reduction
TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-08-06
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance