Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 99.69 kDa 
• Atom Count: 7013 
• Modelled Residue Count: 920 
• Deposited Residue Count: 920 
• Unique protein chains: 1

3MKU

Structure of a Cation-bound Multidrug and Toxin Compound Extrusion (MATE) transporter

• PDB DOI: 10.2210/pdb3MKU/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Vibrio cholerae O1 biovar El Tor str. N16961
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-04-15 Released: 2010-09-29 
• Deposition Author(s): He, X., Szewczyk, P., Karyakin, A., Evin, M., Hong, W.-X., Zhang, Q., Chang, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 4.20 Å
• R-Value Free: 0.342 
• R-Value Work: 0.309 
• R-Value Observed: 0.309 

Literature

Structure of a cation-bound multidrug and toxic compound extrusion transporter.

He, X., Szewczyk, P., Karyakin, A., Evin, M., Hong, W.X., Zhang, Q., Chang, G.

(2010) Nature 467: 991-994

• PubMed: 20861838 
• DOI: 10.1038/nature09408
• Primary Citation of Related Structures:  
  3MKT, 3MKU


• PubMed Abstract: 
  

Transporter proteins from the MATE (multidrug and toxic compound extrusion) family are vital in metabolite transport in plants, directly affecting crop yields worldwide. MATE transporters also mediate multiple-drug resistance (MDR) in bacteria and mammals, modulating the efficacy of many pharmaceutical drugs used in the treatment of a variety of diseases. MATE transporters couple substrate transport to electrochemical gradients and are the only remaining class of MDR transporters whose structure has not been determined. Here we report the X-ray structure of the MATE transporter NorM from Vibrio cholerae determined to 3.65 Å, revealing an outward-facing conformation with two portals open to the outer leaflet of the membrane and a unique topology of the predicted 12 transmembrane helices distinct from any other known MDR transporter. We also report a cation-binding site in close proximity to residues previously deemed critical for transport. This conformation probably represents a stage of the transport cycle with high affinity for monovalent cations and low affinity for substrates.

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Organizational Affiliation: 

Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, CB105, La Jolla, California 92037, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Multi antimicrobial extrusion protein (Na(+)/drug antiporter) MATE-like MDR efflux pump	A, B	460	Vibrio cholerae O1 biovar El Tor str. N16961	Mutation(s): 0  Gene Names: NorM

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
RB	C [auth A], D [auth B]	RUBIDIUM ION Rb NCCSSGKUIKYAJD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 4.20 Å
• R-Value Free: 0.342 
• R-Value Work: 0.309 
• R-Value Observed: 0.309 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 159.8	α = 90
b = 241.85	β = 90
c = 46.15	γ = 90

Software Package:

Software Name	Purpose
Blu-Ice	data collection
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-04-15 
• Released Date: 2010-09-29 
Deposition Author(s): He, X., Szewczyk, P., Karyakin, A., Evin, M., Hong, W.-X., Zhang, Q., Chang, G.

Revision History  

• Version 1.0: 2010-09-29
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance