2J8S

Drug Export Pathway of Multidrug Exporter AcrB Revealed by DARPin Inhibitors


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Drug Export Pathway of Multidrug Exporter Acrb Revealed by Darpin Inhibitors.

Sennhauser, G.Amstutz, P.Briand, C.Storchenegger, O.Grutter, M.G.

(2007) Plos Biol. 5: E7

  • DOI: 10.1371/journal.pbio.0050007

  • PubMed Abstract: 
  • The multidrug exporter AcrB is the inner membrane component of the AcrAB-TolC drug efflux system in Escherichia coli and is responsible for the resistance of this organism to a wide range of drugs. Here we describe the crystal structure of the trimer ...

    The multidrug exporter AcrB is the inner membrane component of the AcrAB-TolC drug efflux system in Escherichia coli and is responsible for the resistance of this organism to a wide range of drugs. Here we describe the crystal structure of the trimeric AcrB in complex with a designed ankyrin-repeat protein (DARPin) inhibitor at 2.5-A resolution. The three subunits of AcrB are locked in different conformations revealing distinct channels in each subunit. There seems to be remote conformational coupling between the channel access, exit, and the putative proton-translocation site, explaining how the proton motive force is used for drug export. Thus our structure suggests a transport pathway not through the central pore but through the identified channels in the individual subunits, which greatly advances our understanding of the multidrug export mechanism.


    Organizational Affiliation

    University of Zurich, Zurich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACRIFLAVINE RESISTANCE PROTEIN B
A, B, C
1055Escherichia coli (strain K12)Gene Names: acrB (acrE)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Multi-Drug Efflux Transporters
Protein: 
AcrB bacterial multi-drug efflux transporter
Find proteins for P31224 (Escherichia coli (strain K12))
Go to UniProtKB:  P31224
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DARPIN
D, E
169N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LMT
Query on LMT

Download SDF File 
Download CCD File 
A, B, C
DODECYL-BETA-D-MALTOSIDE
C24 H46 O11
NLEBIOOXCVAHBD-QKMCSOCLSA-N
 Ligand Interaction
LMU
Query on LMU

Download SDF File 
Download CCD File 
A
DODECYL-ALPHA-D-MALTOSIDE
C24 H46 O11
NLEBIOOXCVAHBD-YHBSTRCHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 146.180α = 90.00
b = 157.410β = 90.00
c = 246.040γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
CNSrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-01-23
    Type: Initial release
  • Version 1.1: 2016-12-21
    Type: Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Version format compliance