5O66

Asymmetric AcrABZ-TolC


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.9 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

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, United States.,Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom.,Department of Biochemistry and Molecular Biology, Structural Biology Imaging Center, The University of Texas Health Science Center at Houston Medical School, Houston, United States.,Graduate Program in Structural and Computational Biology and Molecular Biophysics, Baylor College of Medicine, Houston, United States.,National Center for Macromolecular Imaging, Baylor College of Medicine, Houston, United States.,MRC Mitochondrial Biology Unit, Cambridge Biomedical Campus, Cambridge, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein TolC
A, B, C
493Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: tolC (colE1-i, mtcB, mukA, refI, toc, weeA)
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
373Escherichia coli O157:H7Mutation(s): 0 
Gene Names: acrA
Find proteins for P0AE07 (Escherichia coli O157:H7)
Go to UniProtKB:  P0AE07
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Multidrug efflux pump subunit AcrB
J, K, L
1049Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: acrB (acrE)
Find proteins for P31224 (Escherichia coli (strain K12))
Go to UniProtKB:  P31224
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Multidrug efflux pump accessory protein AcrZ
M, N, O
54Escherichia coli O157:H7Mutation(s): 0 
Gene Names: acrZ
Find proteins for P0AAX1 (Escherichia coli O157:H7)
Go to UniProtKB:  P0AAX1
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2017-06-05 
  • Released Date: 2017-06-14 
  • Deposition Author(s): Du, D., Luisi, B.F.
  • This entry supersedes: 5V78

Funding OrganizationLocationGrant Number
Wellcome TrustUnited KingdomRG61065
HFSPJapanRG68784

Revision History 

  • Version 1.0: 2017-06-14
    Type: Initial release
  • Version 1.1: 2018-10-24
    Type: Advisory, Data collection, Derived calculations
  • Version 1.2: 2019-10-23
    Type: Data collection, Other