2RDD

X-ray crystal structure of AcrB in complex with a novel transmembrane helix.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.279 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of AcrB in complex with a single transmembrane subunit reveals another twist.

Tornroth-Horsefield, S.Gourdon, P.Horsefield, R.Brive, L.Yamamoto, N.Mori, H.Snijder, A.Neutze, R.

(2007) Structure 15: 1663-1673

  • DOI: 10.1016/j.str.2007.09.023

  • PubMed Abstract: 
  • Bacterial drug resistance is a serious concern for human health. Multidrug efflux pumps export a broad variety of substrates out of the cell and thereby convey resistance to the host. In Escherichia coli, the AcrB:AcrA:TolC efflux complex forms a pri ...

    Bacterial drug resistance is a serious concern for human health. Multidrug efflux pumps export a broad variety of substrates out of the cell and thereby convey resistance to the host. In Escherichia coli, the AcrB:AcrA:TolC efflux complex forms a principal transporter for which structures of the individual component proteins have been determined in isolation. Here, we present the X-ray structure of AcrB in complex with a single transmembrane protein, assigned by mass spectrometry as YajC. A specific rotation of the periplasmic porter domain of AcrB is also revealed, consistent with the hypothesized "twist-to-open" mechanism for TolC activation. Growth experiments with yajc-deleted E. coli reveal a modest increase in the organism's susceptibility to beta-lactam antibiotics, but this effect could not conclusively be attributed to the loss of interactions between YajC and AcrB.


    Organizational Affiliation

    Department of Chemistry, Biochemistry and Biophysics, Gothenburg University, 40530 Gothenburg, Sweden. susanna.tornroth@chem.gu.se




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acriflavine resistance protein B
A
1049Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: acrB (acrE)
Membrane protein
mpstruc
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
UPF0092 membrane protein yajC
B
37Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: yajC
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Multi-Drug Efflux Transporters
Protein: 
AcrB bacterial multi-drug efflux transporter
Find proteins for P0ADZ7 (Escherichia coli (strain K12))
Go to UniProtKB:  P0ADZ7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AIC
Query on AIC

Download SDF File 
Download CCD File 
A
(2S,5R,6R)-6-{[(2R)-2-AMINO-2-PHENYLETHANOYL]AMINO}-3,3-DIMETHYL-7-OXO-4-THIA-1-AZABICYCLO[3.2.0]HEPTANE-2-CARBOXYLIC ACID
AMPICILLIN; D(-)-ALPHA-AMINOBENZYLPENICILLIN; 6-[D(-)-ALPHA-AMINOPHENYLLACETAMIDO]PENICILLANIC ACID
C16 H19 N3 O4 S
AVKUERGKIZMTKX-NJBDSQKTSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.279 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 145.097α = 90.00
b = 145.097β = 90.00
c = 511.644γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
SCALAdata scaling
ADSCdata collection
MOSFLMdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance