SNAP-25 is a Target of Protein Kinase C Phosphorylation Critical to NMDA Receptor Trafficking
Overview
Authors
Affiliations
Protein kinase C (PKC) enhances NMDA receptor (NMDAR)-mediated currents and promotes NMDAR delivery to the cell surface via SNARE-dependent exocytosis. Although the mechanisms of PKC potentiation are established, the molecular target of PKC is unclear. Here we show that synaptosomal-associated protein of 25 kDa (SNAP-25), a SNARE protein, is functionally relevant to PKC-dependent NMDAR insertion, and identify serine residue-187 as the molecular target of PKC phosphorylation. Constitutively active PKC delivered via the patch pipette potentiated NMDA (but not AMPA) whole-cell currents in hippocampal neurons. Expression of RNAi targeting SNAP-25 or mutant SNAP-25(S187A) and/or acute disruption of the SNARE complex by treatment with BoNT A, BoNT B or SNAP-25 C-terminal blocking peptide abolished NMDAR potentiation. A SNAP-25 peptide and function-blocking antibody suppressed PKC potentiation of NMDA EPSCs at mossy fiber-CA3 synapses. These findings identify SNAP-25 as the target of PKC phosphorylation critical to PKC-dependent incorporation of synaptic NMDARs and document a postsynaptic action of this major SNARE protein relevant to synaptic plasticity.
SNARE protein SNAP25 regulates the chloride-transporter KCC2 in neurons.
Raveendran V, Serranilla M, Asgarihafshejani A, de Saint-Rome M, Cherednychenko M, Mullany S iScience. 2024; 27(11):111156.
PMID: 39507243 PMC: 11539599. DOI: 10.1016/j.isci.2024.111156.
Righes Marafiga J, Calcagnotto M Adv Neurobiol. 2023; 34:103-141.
PMID: 37962795 DOI: 10.1007/978-3-031-36159-3_3.
Action of Botulinum Neurotoxin E Type in Experimental Epilepsies.
Antonucci F, Bozzi Y Toxins (Basel). 2023; 15(9).
PMID: 37755976 PMC: 10536604. DOI: 10.3390/toxins15090550.
Molecular Mechanisms Underlying NMDARs Dysfunction and Their Role in ADHD Pathogenesis.
Kus J, Saramowicz K, Czerniawska M, Wiese W, Siwecka N, Rozpedek-Kaminska W Int J Mol Sci. 2023; 24(16).
PMID: 37629164 PMC: 10454781. DOI: 10.3390/ijms241612983.
Sun H, Zhang W, Chu Y, Zhou L, Gong F, Li W J Gastrointest Oncol. 2023; 14(3):1525-1545.
PMID: 37435207 PMC: 10331760. DOI: 10.21037/jgo-23-308.