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- PDB-8t6b: Human VMAT2 in complex with serotonin -

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Basic information

Entry
Database: PDB / ID: 8t6b
TitleHuman VMAT2 in complex with serotonin
ComponentsSynaptic vesicular amine transporter
KeywordsMEMBRANE PROTEIN / transporter
Function / homology
Function and homology information


serotonin secretion by mast cell / somato-dendritic dopamine secretion / histamine uptake / aminergic neurotransmitter loading into synaptic vesicle / neurotransmitter loading into synaptic vesicle / monoamine:proton antiporter activity / clathrin-sculpted monoamine transport vesicle membrane / Serotonin Neurotransmitter Release Cycle / serotonin:sodium:chloride symporter activity / Dopamine Neurotransmitter Release Cycle ...serotonin secretion by mast cell / somato-dendritic dopamine secretion / histamine uptake / aminergic neurotransmitter loading into synaptic vesicle / neurotransmitter loading into synaptic vesicle / monoamine:proton antiporter activity / clathrin-sculpted monoamine transport vesicle membrane / Serotonin Neurotransmitter Release Cycle / serotonin:sodium:chloride symporter activity / Dopamine Neurotransmitter Release Cycle / Norepinephrine Neurotransmitter Release Cycle / serotonin uptake / dopamine transport / monoamine transmembrane transporter activity / histamine secretion by mast cell / monoamine transport / dopaminergic synapse / SLC-mediated transport of neurotransmitters / neurotransmitter transport / negative regulation of reactive oxygen species biosynthetic process / secretory granule membrane / response to amphetamine / post-embryonic development / locomotory behavior / response to toxic substance / terminal bouton / synaptic vesicle / synaptic vesicle membrane / chemical synaptic transmission / axon / intracellular membrane-bounded organelle / dendrite / centrosome / membrane / plasma membrane
Similarity search - Function
: / Major facilitator superfamily / Major Facilitator Superfamily / Major facilitator superfamily domain / Major facilitator superfamily (MFS) profile. / MFS transporter superfamily
Similarity search - Domain/homology
SEROTONIN / Synaptic vesicular amine transporter
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.72 Å
AuthorsPidathala, S. / Dai, Y. / Lee, C.H.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM143282 United States
CitationJournal: Nature / Year: 2023
Title: Mechanisms of neurotransmitter transport and drug inhibition in human VMAT2.
Authors: Shabareesh Pidathala / Shuyun Liao / Yaxin Dai / Xiao Li / Changkun Long / Chi-Lun Chang / Zhe Zhang / Chia-Hsueh Lee /
Abstract: Monoamine neurotransmitters such as dopamine and serotonin control important brain pathways, including movement, sleep, reward and mood. Dysfunction of monoaminergic circuits has been implicated in ...Monoamine neurotransmitters such as dopamine and serotonin control important brain pathways, including movement, sleep, reward and mood. Dysfunction of monoaminergic circuits has been implicated in various neurodegenerative and neuropsychiatric disorders. Vesicular monoamine transporters (VMATs) pack monoamines into vesicles for synaptic release and are essential to neurotransmission. VMATs are also therapeutic drug targets for a number of different conditions. Despite the importance of these transporters, the mechanisms of substrate transport and drug inhibition of VMATs have remained elusive. Here we report cryo-electron microscopy structures of the human vesicular monoamine transporter VMAT2 in complex with the antichorea drug tetrabenazine, the antihypertensive drug reserpine or the substrate serotonin. Remarkably, the two drugs use completely distinct inhibition mechanisms. Tetrabenazine binds VMAT2 in a lumen-facing conformation, locking the luminal gating lid in an occluded state to arrest the transport cycle. By contrast, reserpine binds in a cytoplasm-facing conformation, expanding the vestibule and blocking substrate access. Structural analyses of VMAT2 also reveal the conformational changes following transporter isomerization that drive substrate transport into the vesicle. These findings provide a structural framework for understanding the physiology and pharmacology of neurotransmitter packaging by synaptic vesicular transporters.
History
DepositionJun 15, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 1, 2023Provider: repository / Type: Initial release
Revision 1.1Nov 15, 2023Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Dec 13, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Synaptic vesicular amine transporter
hetero molecules


Theoretical massNumber of molelcules
Total (without water)53,7192
Polymers53,5431
Non-polymers1761
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Synaptic vesicular amine transporter / Monoamine transporter / Solute carrier family 18 member 2 / Vesicular amine transporter 2 / VAT2


Mass: 53542.777 Da / Num. of mol.: 1 / Mutation: Y418S
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC18A2, SVMT, VMAT2 / Production host: Homo sapiens (human) / References: UniProt: Q05940
#2: Chemical ChemComp-SRO / SEROTONIN / 3-(2-AMINOETHYL)-1H-INDOL-5-OL


Mass: 176.215 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H12N2O / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Human VMAT2 in complex with serotonin / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 64.5 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: dev_4788: / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.72 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 120545 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0032986
ELECTRON MICROSCOPYf_angle_d0.7544059
ELECTRON MICROSCOPYf_dihedral_angle_d5.23418
ELECTRON MICROSCOPYf_chiral_restr0.042483
ELECTRON MICROSCOPYf_plane_restr0.006502

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