Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density

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

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 33.24 kDa 
• Atom Count: 2178 
• Modelled Residue Count: 258 
• Deposited Residue Count: 294 
• Unique protein chains: 1

3G40

Crystal structure of the cytoplasmic domain of a prokaryotic cation chloride cotransporter

• DOI: 10.2210/pdb3G40/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Methanosarcina acetivorans
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-02-03 Released: 2009-04-28 
• Deposition Author(s): Warmuth, S., Zimmermann, I., Dutzler, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.233 
• R-Value Work: 0.198 
• R-Value Observed: 0.202 

Literature

X-ray Structure of the C-Terminal Domain of a Prokaryotic Cation-Chloride Cotransporter

Warmuth, S., Zimmermann, I., Dutzler, R.

(2009) Structure 17: 538-546

• PubMed: 19368887 
• DOI: 10.1016/j.str.2009.02.009
• Primary Citation of Related Structures:  
  3G40


• PubMed Abstract: 
  

The cation-chloride cotransporters (CCCs) mediate the electroneutral transport of chloride in dependence of sodium and potassium. The proteins share a conserved structural scaffold that consists of a transmembrane transport domain followed by a cytoplasmic regulatory domain. We have determined the X-ray structure of the C-terminal domain of the archaea Methanosarcina acetivorans. The structure shows a novel fold of a regulatory domain that is distantly related to universal stress proteins. The protein forms dimers in solution, which is consistent with the proposed dimeric organization of eukaryotic CCC transporters. The dimer interface observed in different crystal forms is unusual because the buried area is relatively small and hydrophilic. By using a biochemical approach we show that this interaction is preserved in solution and in the context of the full-length transporter. Our studies reveal structural insight into the CCC family and establish the oligomeric organization of this important class of transport proteins.

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Organizational Affiliation: 

Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Na-K-Cl cotransporter	A	294	Methanosarcina acetivorans	Mutation(s): 0  Gene Names: MA4506
Find proteins for Q8THK8 (Methanosarcina acetivorans (strain ATCC 35395 / DSM 2834 / JCM 12185 / C2A)) Explore Q8THK8  Go to UniProtKB:  Q8THK8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.233 
• R-Value Work: 0.198 
• R-Value Observed: 0.202 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 68.045	α = 90
b = 68.045	β = 90
c = 137.025	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
DENZO	data reduction
SCALEPACK	data scaling
SHELXS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-02-03 
• Released Date: 2009-04-28 
Deposition Author(s): Warmuth, S., Zimmermann, I., Dutzler, R.

Revision History  

• Version 1.0: 2009-04-28
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance