4MT4

Crystal structure of the Campylobacter jejuni CmeC outer membrane channel

• PDB DOI:  https://doi.org/10.2210/pdb4MT4/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Campylobacter jejuni
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2013-09-19 Released: 2014-09-24 
• Deposition Author(s): Su, C.-C., Yu, E.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.37 Å
• R-Value Free: 0.243 
• R-Value Work: 0.210 
• R-Value Observed: 0.211 

Literature

Crystal structure of the Campylobacter jejuni CmeC outer membrane channel.

Su, C.C., Radhakrishnan, A., Kumar, N., Long, F., Bolla, J.R., Lei, H.T., Delmar, J.A., Do, S.V., Chou, T.H., Rajashankar, K.R., Zhang, Q., Yu, E.W.

(2014) Protein Sci 23: 954-961

• PubMed: 24753291 
• DOI: https://doi.org/10.1002/pro.2478
• Primary Citation of Related Structures:  
  4MT4


• PubMed Abstract: 
  

As one of the world's most prevalent enteric pathogens, Campylobacter jejuni is a major causative agent of human enterocolitis and is responsible for more than 400 million cases of diarrhea each year. The impact of this pathogen on children is of particular significance. Campylobacter has developed resistance to many antimicrobial agents via multidrug efflux machinery. The CmeABC tripartite multidrug efflux pump, belonging to the resistance-nodulation-cell division (RND) superfamily, plays a major role in drug resistant phenotypes of C. jejuni. This efflux complex spans the entire cell envelop of C. jejuni and mediates resistance to various antibiotics and toxic compounds. We here report the crystal structure of C. jejuni CmeC, the outer membrane component of the CmeABC tripartite multidrug efflux system. The structure reveals a possible mechanism for substrate export.

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Organizational Affiliation: 

Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 169.42 kDa 
• Atom Count: 12,304 
• Modelled Residue Count: 1,417 
• Deposited Residue Count: 1,437 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CmeC	A, B, C	479	Campylobacter jejuni	Mutation(s): 0  Gene Names: cmeC Membrane Entity: Yes
UniProt
Find proteins for Q8RTE3 (Campylobacter jejuni) Explore Q8RTE3  Go to UniProtKB:  Q8RTE3

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
C8E	D [auth A], E [auth A], G [auth A], H [auth A], I [auth A], J [auth A], L [auth A], N [auth B], O [auth B], P [auth B], Q [auth B], R [auth B], T [auth C], U [auth C], V [auth C], W [auth C], X [auth C], Y [auth C]	(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE C16 H34 O5 FEOZZFHAVXYAMB-UHFFFAOYSA-N
3PK	K [auth A], S [auth B], Z [auth C]	(2S)-1-(pentanoyloxy)propan-2-yl hexanoate C14 H26 O4 XIGVTLHUQMMWJT-LBPRGKRZSA-N
SO4	F [auth A], M [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.37 Å
• R-Value Free: 0.243 
• R-Value Work: 0.210 
• R-Value Observed: 0.211 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 91.827	α = 90
b = 146.324	β = 90
c = 418.866	γ = 90

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
HKL-2000	data reduction
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-09-24 
Deposition Author(s): Su, C.-C., Yu, E.W.

Revision History  

• Version 1.0: 2014-09-24
  Type: Initial release
  
• Version 1.1: 2014-10-01
  Changes: Other