9kqa
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Cryo-EM structure of human VMAT2 in complex with Tetrabenazine== | |
| + | <StructureSection load='9kqa' size='340' side='right'caption='[[9kqa]], [[Resolution|resolution]] 3.28Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[9kqa]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9KQA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9KQA FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.28Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EBZ:(3S,5R,11bS)-9,10-dimethoxy-3-(2-methylpropyl)-1,3,4,6,7,11b-hexahydro-2H-pyrido[2,1-a]isoquinolin-2-one'>EBZ</scene></td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=9kqa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9kqa OCA], [https://pdbe.org/9kqa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9kqa RCSB], [https://www.ebi.ac.uk/pdbsum/9kqa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9kqa ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Disease == | ||
| + | [https://www.uniprot.org/uniprot/VMAT2_HUMAN VMAT2_HUMAN] Brain dopamine-serotonin vesicular transport disease. The disease is caused by variants affecting the gene represented in this entry. | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/C562_ECOLX C562_ECOLX] Electron-transport protein of unknown function.[https://www.uniprot.org/uniprot/VMAT2_HUMAN VMAT2_HUMAN] Electrogenic antiporter that exchanges one cationic monoamine with two intravesicular protons across the membrane of secretory and synaptic vesicles. Uses the electrochemical proton gradient established by the V-type proton-pump ATPase to accumulate high concentrations of monoamines inside the vesicles prior to their release via exocytosis. Transports a variety of catecholamines such as dopamine, adrenaline and noradrenaline, histamine, and indolamines such as serotonin (PubMed:23363473, PubMed:8643547). Regulates the transvesicular monoaminergic gradient that determines the quantal size. Mediates somatodendritic dopamine release in hippocampal neurons, likely as part of a regulated secretory pathway that integrates retrograde synaptic signals (By similarity). Acts as a primary transporter for striatal dopamine loading ensuring impulse-dependent release of dopamine at the synaptic cleft (By similarity). Responsible for histamine and serotonin storage and subsequent corelease from mast cell granules (By similarity) (PubMed:8860238).[UniProtKB:Q01827][UniProtKB:Q8BRU6]<ref>PMID:23363473</ref> <ref>PMID:8643547</ref> <ref>PMID:8860238</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Vesicular monoamine transporter 2 (VMAT2) is crucial for packaging monoamine neurotransmitters into synaptic vesicles, with their dysregulation linked to schizophrenia, mood disorders, and Parkinson's disease. Tetrabenazine (TBZ) and valbenazine (VBZ), both FDA-approved VMAT2 inhibitors, are employed to treat chorea and tardive dyskinesia (TD). Our study presents the structures of VMAT2 bound to substrates serotonin (5-HT) and dopamine (DA), as well as the inhibitors TBZ and VBZ. Utilizing cryo-electron microscopy (cryo-EM), mutagenesis functional assays, and molecular dynamics (MD) simulations, we elucidate the mechanisms of substrate transport and drug inhibition. Our MD simulations indicate potential binding poses of substrate (5-HT) in both cytosol-facing and lumen-facing states, emphasizing the significance of protonation of key acidic residues for substrate release. We demonstrate that TBZ locks VMAT2 in a lumen-facing occluded state, while VBZ stabilizes it in a lumen-facing conformation. These insights enhance our understanding of VMAT2 function and provide valuable insights for the development of novel therapeutic strategies for psychiatric disorders. | ||
| - | + | Drug inhibition and substrate transport mechanisms of human VMAT2.,Wei F, Liu H, Zhang W, Wang J, Zhang Y Nat Commun. 2025 Jan 2;16(1):323. doi: 10.1038/s41467-024-55361-0. PMID:39747030<ref>PMID:39747030</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 9kqa" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Homo sapiens]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Wei F]] | ||
| + | [[Category: Zhang W]] | ||
| + | [[Category: Zhang Y]] | ||
Current revision
Cryo-EM structure of human VMAT2 in complex with Tetrabenazine
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