5T0O

Crystal Structure of a membrane protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.211 

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:  

  • 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 largel ...

    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

    Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA, 50011, USA.,Department of Veterinary Microbiology, College of Veterinary Medicine, Iowa State University, Ames, IA, 50011, USA.,NE-CAT and Department of Chemistry and Chemical Biology, Cornell University, Argonne National Laboratory, Bldg. 436E, 9700 S. Cass Avenue, Argonne, IL, 60439, USA.,Department of Physics and Astronomy, Iowa State University, Ames, IA, 50011, USA. ewyu@iastate.edu.,Department of Physics and Astronomy, Iowa State University, Ames, IA, 50011, USA.,Department of Chemistry, Iowa State University, Ames, IA, 50011, USA.,Department of Chemistry, Iowa State University, Ames, IA, 50011, USA. ewyu@iastate.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CmeB
A, B, C
1040Campylobacter jejuniMutation(s): 0 
Gene Names: cmeB (bepE)
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Multi-Drug Efflux Transporters
Protein: 
CmeB multi-drug efflux transporter, C2 space group
Find proteins for Q8RTE4 (Campylobacter jejuni)
Go to UniProtKB:  Q8RTE4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.211 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 300.710α = 90.00
b = 147.538β = 99.87
c = 120.027γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
HKL-2000data reduction
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-08-16 
  • Released Date: 2017-09-06 
  • Deposition Author(s): Su, C.-C., Yu, E.W.

Revision History 

  • Version 1.0: 2017-09-06
    Type: Initial release