5LQ3

Structures and transport dynamics of the Campylobacter jejuni multidrug efflux pump CmeB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.55 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structures and transport dynamics of a Campylobacter jejuni multidrug efflux pump.

Su, C.C.Yin, L.Kumar, N.Dai, L.Radhakrishnan, A.Bolla, J.R.Lei, H.T.Chou, T.H.Delmar, J.A.Rajashankar, K.R.Zhang, Q.Shin, Y.K.Yu, E.W.

(2017) Nat Commun 8: 171-171

  • DOI: 10.1038/s41467-017-00217-z
  • Primary Citation of Related Structures:  
    5LQ3, 5T0O

  • PubMed Abstract: 
  • Resistance-nodulation-cell division efflux pumps are integral membrane proteins that catalyze the export of substrates across cell membranes. Within the hydrophobe-amphiphile efflux subfamily, these resistance-nodulation-cell division proteins largely form trimeric efflux pumps ...

    Resistance-nodulation-cell division efflux pumps are integral membrane proteins that catalyze the export of substrates across cell membranes. Within the hydrophobe-amphiphile efflux subfamily, these resistance-nodulation-cell division proteins largely form trimeric efflux pumps. The drug efflux process has been proposed to entail a synchronized motion between subunits of the trimer to advance the transport cycle, leading to the extrusion of drug molecules. Here we use X-ray crystallography and single-molecule fluorescence resonance energy transfer imaging to elucidate the structures and functional dynamics of the Campylobacter jejuni CmeB multidrug efflux pump. We find that the CmeB trimer displays a very unique conformation. A direct observation of transport dynamics in individual CmeB trimers embedded in membrane vesicles indicates that each CmeB subunit undergoes conformational transitions uncoordinated and independent of each other. On the basis of our findings and analyses, we propose a model for transport mechanism where CmeB protomers function independently within the trimer.Multidrug efflux pumps significantly contribute for bacteria resistance to antibiotics. Here the authors present the structure of Campylobacter jejuni CmeB pump combined with functional FRET assays to propose a transport mechanism where each CmeB protomers is functionally independent from the trimer.


    Organizational Affiliation

    Department of Chemistry, Iowa State University, Ames, IA, 50011, USA. ewyu@iastate.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CmeBA, B, C, D, E, F1035Campylobacter jejuniMutation(s): 0 
Gene Names: cmeB
Membrane Entity: Yes 
UniProt
Find proteins for Q0PBE4 (Campylobacter jejuni subsp. jejuni serotype O:2 (strain ATCC 700819 / NCTC 11168))
Explore Q0PBE4 
Go to UniProtKB:  Q0PBE4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.55 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120.868α = 99.79
b = 127.987β = 99.45
c = 169.606γ = 84.95
Software Package:
Software NamePurpose
PHENIXrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
DENZOdata reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2016-08-15 
  • Released Date: 2017-08-09 
  • Deposition Author(s): Su, C.C.

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-09
    Type: Initial release