Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Predict Membrane 

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 98.89 kDa 
• Atom Count: 6186 
• Modelled Residue Count: 768 
• Deposited Residue Count: 874 
• Unique protein chains: 1

6NPJ

Structure of the NKCC1 CTD

• PDB DOI: 10.2210/pdb6NPJ/pdb
• EM Map EMD-0471: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Danio rerio
• Expression System: Autographa californica nucleopolyhedrovirus
• Mutation(s): No 
• Membrane Protein: Yes  mpstruc


• Deposited: 2019-01-17 Released: 2019-07-31 
• Deposition Author(s): Feng, L., Liao, M.F., Orlando, B., Zhang, J.R.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structure and mechanism of the cation-chloride cotransporter NKCC1.

Chew, T.A., Orlando, B.J., Zhang, J., Latorraca, N.R., Wang, A., Hollingsworth, S.A., Chen, D.H., Dror, R.O., Liao, M., Feng, L.

(2019) Nature 572: 488-492

• PubMed: 31367042 
• DOI: 10.1038/s41586-019-1438-2
• Primary Citation of Related Structures:  
  6NPH, 6NPJ, 6NPK, 6NPL


• PubMed Abstract: 
  

Cation-chloride cotransporters (CCCs) mediate the electroneutral transport of chloride, potassium and/or sodium across the membrane. They have critical roles in regulating cell volume, controlling ion absorption and secretion across epithelia, and maintaining intracellular chloride homeostasis. These transporters are primary targets for some of the most commonly prescribed drugs. Here we determined the cryo-electron microscopy structure of the Na-K-Cl cotransporter NKCC1, an extensively studied member of the CCC family, from Danio rerio. The structure defines the architecture of this protein family and reveals how cytosolic and transmembrane domains are strategically positioned for communication. Structural analyses, functional characterizations and computational studies reveal the ion-translocation pathway, ion-binding sites and key residues for transport activity. These results provide insights into ion selectivity, coupling and translocation, and establish a framework for understanding the physiological functions of CCCs and interpreting disease-related mutations.

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Organizational Affiliation: 

Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sodium-potassium-chloride cotransporter 1	B, A [auth C]	437	Danio rerio	Mutation(s): 0  Gene Names: slc12a2, nkcc1 Membrane Entity: Yes
UniProt
Find proteins for A0A0G2KTI4 (Danio rerio) Explore A0A0G2KTI4  Go to UniProtKB:  A0A0G2KTI4

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2019-01-17 
• Released Date: 2019-07-31 
Deposition Author(s): Feng, L., Liao, M.F., Orlando, B., Zhang, J.R.

Revision History  

• Version 1.0: 2019-07-31
  Type: Initial release
  
• Version 1.1: 2019-08-14
  Changes: Data collection, Database references
• Version 1.2: 2019-08-28
  Changes: Data collection, Database references