5V5S

multi-drug efflux; membrane transport; RND superfamily; Drug resistance


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

An allosteric transport mechanism for the AcrAB-TolC Multidrug Efflux Pump.

Wang, Z.Fan, G.Hryc, C.F.Blaza, J.N.Serysheva, I.I.Schmid, M.F.Chiu, W.Luisi, B.F.Du, D.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.24905
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial efflux pumps confer multidrug resistance by transporting diverse antibiotics from the cell. In Gram-negative bacteria, some of these pumps form multi-protein assemblies that span the cell envelope. Here, we report the near-atomic resolution ...

    Bacterial efflux pumps confer multidrug resistance by transporting diverse antibiotics from the cell. In Gram-negative bacteria, some of these pumps form multi-protein assemblies that span the cell envelope. Here, we report the near-atomic resolution cryoEM structures of the Escherichia coli AcrAB-TolC multidrug efflux pump in resting and drug transport states, revealing a quaternary structural switch that allosterically couples and synchronizes initial ligand binding with channel opening. Within the transport-activated state, the channel remains open even though the pump cycles through three distinct conformations. Collectively, our data provide a dynamic mechanism for the assembly and operation of the AcrAB-TolC pump.


    Organizational Affiliation

    National Center for Macromolecular Imaging, Baylor College of Medicine, Houston, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein TolC
A, B, C
442Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: tolC (colE1-i, mtcB, mukA, refI, toc, weeA)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Multi-Drug Efflux Transporters
Protein: 
AcrB bacterial multi-drug efflux transporter
Find proteins for P02930 (Escherichia coli (strain K12))
Go to UniProtKB:  P02930
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Multidrug efflux pump subunit AcrA
D, E, F, G, H, I
397Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: acrA (lir, mtcA)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Multi-Drug Efflux Transporters
Protein: 
AcrB bacterial multi-drug efflux transporter
Find proteins for P0AE06 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AE06
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Multidrug efflux pump subunit AcrB
J, K, L
1049Escherichia coli (strain K12)Mutation(s): 0 
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
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-04-19
    Type: Initial release
  • Version 1.1: 2017-08-02
    Type: Data collection, Refinement description
  • Version 1.2: 2019-02-20
    Type: Advisory, Data collection, Derived calculations