View source for 9okg


==Cryo-EM structure of human SV2A in complex with levetiracetam==
<StructureSection load='9okg' size='340' side='right'caption='[[9okg]], [[Resolution|resolution]] 2.58&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9okg]] 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=9OKG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9OKG 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]] 2.58&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=UKX:(2~{S})-2-(2-oxidanylidenepyrrolidin-1-yl)butanamide'>UKX</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=9okg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9okg OCA], [https://pdbe.org/9okg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9okg RCSB], [https://www.ebi.ac.uk/pdbsum/9okg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9okg ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The synaptic vesicle glycoprotein 2A (SV2A), a member of the major facilitator superfamily (MFS), is a key target for antiseizure medications and a biomarker for synaptic density imaging. Despite its clinical importance, the mechanisms underlying SV2A ligand binding and modulation remain poorly understood. Here, we report sub-3 A resolution cryo-electron microscopy (cryo-EM) structures of human SV2A in its apo form and in complex with FDA-approved antiseizure medication levetiracetam; PET imaging tracer UCB-J; experimental antiseizure drug padsevonil; and allosteric modulator UCB1244283. We find that levetiracetam and UCB-J induce vestibule occlusion, a hallmark conformational transition of MFS transporters that had not been observed in previous SV2A structures. UCB1244283 binds to an allosteric site and enhances orthosteric ligand engagement by stabilizing the occluded state and slowing ligand dissociation. Notably, padsevonil occupies both orthosteric and allosteric sites, functionally precluding modulation. These findings uncover an allosteric mechanism of regulation and provide a structural framework for the development of modulators targeting SV2A and related MFS transporters.

Structural pharmacology of SV2A reveals an allosteric modulation mechanism in the major facilitator superfamily.,Pidathala S, Chen X, Dai Y, Nguyen LN, Gorgulla C, Niu Y, Liu F, Lee CH Nat Commun. 2025 Nov 28;16(1):10748. doi: 10.1038/s41467-025-65781-1. PMID:41315229<ref>PMID:41315229</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9okg" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Dai Y]]
[[Category: Lee CH]]
[[Category: Pidathala S]]