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Closed Access item A role for SNAP25 in internalization of kainate receptors and synaptic plasticity

Other Titles:SNAP25 controls KAR endocytosis
Authors:Selak, Sanja
Paternain, Ana V.
Aller, María Isabel
Picó, Esther
Rivera, Rocío
Lerma Gómez, Juan
Keywords:Kainate receptors (KARs), Synaptic strength, Synaptic plasticity, SNAP25, GluK5 subunits, Protein complexes, Signaling
Issue Date:13-Aug-2009
Citation:Neuron 63(3): 357-371 (2009)
Abstract:Regulation of surface insertion and internalization of AMPA and NMDA receptors has emerged as a key mechanism for the control of synaptic strength. Regulatory elements for synaptic kainate receptors (KARs) are, however, largely undetermined. We have found that SNAP25 is critical for the synaptic removal of KARs, acting via GluK5 (i.e., KA2) subunits. SNAP25 coimmunoprecipitates with protein complexes containing PICK1, GRIP1, and GluK5 and colocalizes with GluK5 in both hippocampal neurons and transfected HEK293 cells. In hippocampal slices, purified SNAP25 antibodies and blocking peptides caused a GluK5-dependent run-up of KARs-mediated EPSC (EPSC-KAR) recorded from CA3 pyramidal neurons when included in the patch pipette and prevented activity-dependent long-term depression of EPSC-KAR. As EPSC-KAR LTD, SNAP25/PICK1/GluK5 interactions are dynamically regulated by PKC.
Description:15 pages, 9 figures.-- PMID: 19679075 [PubMed].-- Supporting information including detailed Experimental Procedures and eight figures available at: http://dx.doi.org/10.1016/j.neuron.2009.07.017
Publisher version (URL):http://dx.doi.org/10.1016/j.neuron.2009.07.017
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