Cited by 287Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersProtein Kinase Regulation and GTPase Signaling

SynGAP-MUPP1-CaMKII synaptic complexes regulate p38 MAP kinase activity and NMDA receptor-dependent synaptic AMPA receptor potentiation

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Krapivinsky, Grigory, Medina, Igor, Krapivinsky, Luba, Gapon, Svetlana, Clapham, David E·2004·Neuron

Abstract

The synapse contains densely localized and interacting proteins that enable it to adapt to changing inputs. We describe a Ca2+-sensitive protein complex involved in the regulation of AMPA receptor synaptic plasticity. The complex is comprised of MUPPI, a multi-PDZ domain-containing protein; SynGAP, a synaptic GTPase-activating protein; and the Ca2+/calmodulin-dependent kinase CaMKII. In synapses of hippocampal neurons, SynGAP and CaMKII are brought together by direct physical interaction with the PDZ domains of MUPP1, and in this complex, SynGAP is phosphorylated. Ca2+CaM binding to CaMKII dissociates it from the MUPP1 complex, and Ca2+ entering via the NMDAR drives the dephosphorylation of SynGAP. Specific peptide-induced SynGAP dissociation from the MUPP1-CaMKII complex results in SynGAP dephosphorylation accompanied by P38 MAPK inactivation, potentiation of synaptic AMPA responses, and an increase in the number of AMPAR-containing clusters in hippocampal neuron synapses. siRNA-mediated SynGAP knockdown confirmed these results. These data implicate SynGAP in NMDAR- and CaMKII-dependent regulation of AMPAR trafficking.

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Crossref · 10.1016/j.neuron.2004.08.003

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  • Disrupting SynGAP expression in dissociated hippocampal neurons can enhance or suppress dendritic spine function.

    “In addition, disrupting SynGAP expression in dissociated hippocampal neurons can enhance dendritic spine function (Kim et al., 2005; Rumbaugh et al., 2006) or suppress it (Krapivinsky et al., 2004).”
  • SynGAP shapes developmental synaptic function through its synaptic GAP activity, suppressing biochemical signaling cascades in dendritic spines that promote synapse growth and AMPA receptor insertion.

    “Mechanistically, SynGAP shapes developmental synaptic function through its synaptic GAP activity, where it suppresses many biochemical signaling cascades within dendritic spines that promote growth of synapses and insertion of AMPARs (Kim et al., 2005; Krapivinsky et al., 2004; Rumbaugh et al., 2006).”
  • SynGAP's broad action on dendritic spine signaling arises from its central location in the NMDAR complex and its promiscuous GAP domain that can regulate various small G-proteins.

    “This broad action of SynGAP on dendritic spine signaling arises from its central location in the NMDAR complex (Kennedy et al., 2005) and its endowment with a promiscuous GAP domain that can regulate a variety of small G-proteins (Krapivinsky et al., 2004; Pena et al., 2008).”

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Authors
Krapivinsky, G., Medina, I., Krapivinsky, L., Gapon, S., & Clapham, D. E.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Inserm (FR)
Corresponding author
Clapham, David E
Venue
Neuron
Publisher
Elsevier BV
Published
2004-08
Volume
43
Issue
4
Pages
563-574
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2022174722
Cited by
287
References
47
Citations by year
2026: 5 · 2025: 10 · 2024: 19 · 2023: 6 · 2022: 8 · 2021: 7 · 2020: 12 · 2019: 11 · 2018: 18 · 2017: 12 · 2016: 13 · 2015: 13 · 2014: 16 · 2013: 9 · 2012: 16
FWCI
5.28
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
SynGAP, MUPP1, CaMKII, p38 MAPK, NMDA receptor, AMPA receptor potentiation, synaptic plasticity, PDZ domain, AMPA receptor trafficking, hippocampal neurons, calcium/calmodulin signaling, synaptic protein complexes
MeSH terms
Amino Acid Sequence, Animals, Carrier Proteins, Cell Line, Hippocampus, Humans, Membrane Proteins, Molecular Sequence Data, Nerve Tissue Proteins, Synaptic Transmission, Synapses, Transfection, Receptors, N-Methyl-D-Aspartate, Calcium-Calmodulin-Dependent Protein Kinases, GTPase-Activating Proteins, ras GTPase-Activating Proteins, Mitogen-Activated Protein Kinases, Intracellular Signaling Peptides and Proteins, p38 Mitogen-Activated Protein Kinases, Rats, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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