8TGK

VMAT1 dimer with histamine and reserpine


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural insights into vesicular monoamine storage and drug interactions.

Ye, J.Chen, H.Wang, K.Wang, Y.Ammerman, A.Awasthi, S.Xu, J.Liu, B.Li, W.

(2024) Nature 629: 235-243

  • DOI: https://doi.org/10.1038/s41586-024-07290-7
  • Primary Citation of Related Structures:  
    8TGG, 8TGH, 8TGI, 8TGJ, 8TGK, 8TGL, 8TGM, 8TGN

  • PubMed Abstract: 

    Biogenic monoamines-vital transmitters orchestrating neurological, endocrinal and immunological functions 1-5 -are stored in secretory vesicles by vesicular monoamine transporters (VMATs) for controlled quantal release 6,7 . Harnessing proton antiport, VMATs enrich monoamines around 10,000-fold and sequester neurotoxicants to protect neurons 8-10 . VMATs are targeted by an arsenal of therapeutic drugs and imaging agents to treat and monitor neurodegenerative disorders, hypertension and drug addiction 1,8,11-16 . However, the structural mechanisms underlying these actions remain unclear. Here we report eight cryo-electron microscopy structures of human VMAT1 in unbound form and in complex with four monoamines (dopamine, noradrenaline, serotonin and histamine), the Parkinsonism-inducing MPP + , the psychostimulant amphetamine and the antihypertensive drug reserpine. Reserpine binding captures a cytoplasmic-open conformation, whereas the other structures show a lumenal-open conformation stabilized by extensive gating interactions. The favoured transition to this lumenal-open state contributes to monoamine accumulation, while protonation facilitates the cytoplasmic-open transition and concurrently prevents monoamine binding to avoid unintended depletion. Monoamines and neurotoxicants share a binding pocket that possesses polar sites for specificity and a wrist-and-fist shape for versatility. Variations in this pocket explain substrate preferences across the SLC18 family. Overall, these structural insights and supporting functional studies elucidate the mechanism of vesicular monoamine transport and provide the basis to develop therapeutics for neurodegenerative diseases and substance abuse.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St Louis, MO, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Chromaffin granule amine transporter
A, B
470Homo sapiensMutation(s): 0 
Gene Names: SLC18A1VAT1VMAT1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P54219 (Homo sapiens)
Explore P54219 
Go to UniProtKB:  P54219
PHAROS:  P54219
GTEx:  ENSG00000036565 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP54219
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.20.1_4487:

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
American Heart AssociationUnited StatesEstablished Investigator Award

Revision History  (Full details and data files)

  • Version 1.0: 2024-03-20
    Type: Initial release
  • Version 1.1: 2024-04-10
    Changes: Database references
  • Version 1.2: 2024-05-15
    Changes: Database references