9BFK

Cryo-EM structure of human CHT1 in the ML352 bound state

  • Classification: TRANSPORT PROTEIN
  • Organism(s): Homo sapiens
  • Expression System: Homo sapiens
  • Mutation(s): No 

  • Deposited: 2024-04-18 Released: 2024-11-06 
  • Deposition Author(s): Xue, J., Jiang, Y.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Welch Foundation, Howard Hughes Medical Institute (HHMI)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.85 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

Structural mechanisms of human sodium-coupled high-affinity choline transporter CHT1.

Xue, J.Chen, H.Wang, Y.Jiang, Y.

(2024) Cell Discov 10: 116-116

  • DOI: https://doi.org/10.1038/s41421-024-00731-7
  • Primary Citation of Related Structures:  
    9BFI, 9BFJ, 9BFK, 9BIM

  • PubMed Abstract: 

    Mammalian sodium-coupled high-affinity choline transporter CHT1 uptakes choline in cholinergic neurons for acetylcholine synthesis and plays a critical role in cholinergic neurotransmission. Here, we present the high-resolution cryo-EM structures of human CHT1 in apo, substrate- and ion-bound, hemicholinium-3-inhibited, and ML352-inhibited states. These structures represent three distinct conformational states, elucidating the structural basis of the CHT1-mediated choline uptake mechanism. Three ion-binding sites, two for Na + and one for Cl - , are unambiguously defined in the structures, demonstrating that both ions are indispensable cofactors for high-affinity choline-binding and are likely transported together with the substrate in a 2:1:1 stoichiometry. The two inhibitor-bound CHT1 structures reveal two distinct inhibitory mechanisms and provide a potential structural platform for designing therapeutic drugs to manipulate cholinergic neuron activity. Combined with the functional analysis, this study provides a comprehensive view of the structural mechanisms underlying substrate specificity, substrate/ion co-transport, and drug inhibition of a physiologically important symporter.


  • Organizational Affiliation

    Institute of Aging & Tissue Regeneration, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. jxue@shsmu.edu.cn.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
High affinity choline transporter 1614Homo sapiensMutation(s): 0 
Gene Names: SLC5A7CHT1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9GZV3 (Homo sapiens)
Explore Q9GZV3 
Go to UniProtKB:  Q9GZV3
PHAROS:  Q9GZV3
GTEx:  ENSG00000115665 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9GZV3
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
A1AOW
Query on A1AOW

Download Ideal Coordinates CCD File 
B [auth A]4-methoxy-3-[(1-methylpiperidin-4-yl)oxy]-N-{[3-(propan-2-yl)-1,2-oxazol-5-yl]methyl}benzamide
C21 H29 N3 O4
WBLVOWHFRUAMCP-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.85 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM140892
Welch FoundationUnited StatesI-1578
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2024-11-06
    Type: Initial release
  • Version 1.1: 2025-01-15
    Changes: Data collection, Database references