7D90

human potassium-chloride co-transporter KCC3


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures and an activation mechanism of human potassium-chloride cotransporters.

Xie, Y.Chang, S.Zhao, C.Wang, F.Liu, S.Wang, J.Delpire, E.Ye, S.Guo, J.

(2020) Sci Adv 6

  • DOI: https://doi.org/10.1126/sciadv.abc5883
  • Primary Citation of Related Structures:  
    7D8Z, 7D90, 7D99

  • PubMed Abstract: 

    Potassium-chloride cotransporters KCC1 to KCC4 mediate the coupled export of potassium and chloride across the plasma membrane and play important roles in cell volume regulation, auditory system function, and γ-aminobutyric acid (GABA) and glycine-mediated inhibitory neurotransmission. Here, we present 2.9- to 3.6-Å resolution structures of full-length human KCC2, KCC3, and KCC4. All three KCCs adopt a similar overall architecture, a domain-swap dimeric assembly, and an inward-facing conformation. The structural and functional studies reveal that one unexpected N-terminal peptide binds at the cytosolic facing cavity and locks KCC2 and KCC4 at an autoinhibition state. The C-terminal domain (CTD) directly interacts with the N-terminal inhibitory peptide, and the relative motions between the CTD and the transmembrane domain (TMD) suggest that CTD regulates KCCs' activities by adjusting the autoinhibitory effect. These structures provide the first glimpse of full-length structures of KCCs and an autoinhibition mechanism among the amino acid-polyamine-organocation transporter superfamily.


  • Organizational Affiliation

    Department of Biophysics, and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
potassium-chloride cotransporter 3
A, B
1,167Homo sapiensMutation(s): 0 
Gene Names: SLC12A6KCC3
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UHW9 (Homo sapiens)
Explore Q9UHW9 
Go to UniProtKB:  Q9UHW9
PHAROS:  Q9UHW9
GTEx:  ENSG00000140199 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UHW9
Glycosylation
Glycosylation Sites: 2Go to GlyGen: Q9UHW9-1
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China31870724

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-30
    Type: Initial release
  • Version 1.1: 2024-10-09
    Changes: Data collection, Database references, Structure summary