6PZT

cryo-EM structure of human NKCC1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.46 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of the human cation-chloride cotransporter NKCC1 determined by single-particle electron cryo-microscopy.

Yang, X.Wang, Q.Cao, E.

(2020) Nat Commun 11: 1016-1016

  • DOI: 10.1038/s41467-020-14790-3

  • PubMed Abstract: 
  • The secondary active cation-chloride cotransporters (CCCs) utilize the existing Na <sup>+ </sup> and/or K <sup>+ </sup> gradients to move Cl <sup>- </sup> into or out of cells. NKCC1 is an intensively studied member of the CCC family and plays fundam ...

    The secondary active cation-chloride cotransporters (CCCs) utilize the existing Na + and/or K + gradients to move Cl - into or out of cells. NKCC1 is an intensively studied member of the CCC family and plays fundamental roles in regulating trans-epithelial ion movement, cell volume, chloride homeostasis and neuronal excitability. Here, we report a cryo-EM structure of human NKCC1 captured in a partially loaded, inward-open state. NKCC1 assembles into a dimer, with the first ten transmembrane (TM) helices harboring the transport core and TM11-TM12 helices lining the dimer interface. TM1 and TM6 helices break α-helical geometry halfway across the lipid bilayer where ion binding sites are organized around these discontinuous regions. NKCC1 may harbor multiple extracellular entryways and intracellular exits, raising the possibility that K + , Na + , and Cl - ions may traverse along their own routes for translocation. NKCC1 structure provides a blueprint for further probing structure-function relationships of NKCC1 and other CCCs.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112-5650, USA.,Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, 84112-5650, USA. erhu.cao@biochem.utah.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Solute carrier family 12 member 2
B, A
1212Homo sapiensMutation(s): 2 
Gene Names: SLC12A2 (NKCC1)
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Amino Acid/Polyamine/Organocation (APC) Superfamily
Protein: 
NKCC1 cation-chloride cotransporter (CCC) in glyo-diosgenin (GDN) detergent, 150 mM KCl
Find proteins for P55011 (Homo sapiens)
Go to Gene View: SLC12A2
Go to UniProtKB:  P55011
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.46 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2020-03-25
    Type: Initial release