We apologize for Proteopedia being slow to respond. For the past two years, a new implementation of Proteopedia has been being built. Soon, it will replace this 18-year old system. All existing content will be moved to the new system at a date that will be announced here.

9prs

From Proteopedia

Jump to: navigation, search

Cryo-EM structure of human SV2A in complex with Levetiracetam and UCB1244283

Structural highlights

9prs is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 3.03Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

SV2A_HUMAN Plays a role in the control of regulated secretion in neural and endocrine cells, enhancing selectively low-frequency neurotransmission. Positively regulates vesicle fusion by maintaining the readily releasable pool of secretory vesicles (By similarity).

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^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

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