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 
  • R-Value Observed: 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
  • Primary Citation of Related Structures:  
    2J8S

  • 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 trimeric AcrB in complex with a designed ankyrin-repeat protein (DARPin) inhibitor at 2 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ACRIFLAVINE RESISTANCE PROTEIN BA, B, C1055Escherichia coli K-12Mutation(s): 0 
Gene Names: acrBacrEb0462JW0451
Membrane Entity: Yes 
UniProt
Find proteins for P31224 (Escherichia coli (strain K12))
Explore P31224 
Go to UniProtKB:  P31224
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DARPIND, E169synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LMU
Query on LMU

Download Ideal Coordinates CCD File 
I [auth A]DODECYL-ALPHA-D-MALTOSIDE
C24 H46 O11
NLEBIOOXCVAHBD-YHBSTRCHSA-N
 Ligand Interaction
LMT
Query on LMT

Download Ideal Coordinates CCD File 
F [auth A] , G [auth A] , H [auth A] , J [auth B] , K [auth B] , L [auth B] , M [auth C] , N [auth C] , 
F [auth A],  G [auth A],  H [auth A],  J [auth B],  K [auth B],  L [auth B],  M [auth C],  N [auth C],  O [auth C],  P [auth C]
DODECYL-BETA-D-MALTOSIDE
C24 H46 O11
NLEBIOOXCVAHBD-QKMCSOCLSA-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 
  • R-Value Observed: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 146.18α = 90
b = 157.41β = 90
c = 246.04γ = 90
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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