Cited by 732Neuroscience and Neuropharmacology ResearchProtein Kinase Regulation and GTPase SignalingMemory and Neural Mechanisms

Interaction with the NMDA receptor locks CaMKII in an active conformation

Bayer, K.-Ulrich, De Koninck, Paul, Leonard, A. Soren, Hell, Johannes W., Schulman, Howard·2001·Nature

Abstract

Calcium- and calmodulin-dependent protein kinase II (CaMKII) and glutamate receptors are integrally involved in forms of synaptic plasticity that may underlie learning and memory. In the simplest model for long-term potentiation, CaMKII is activated by Ca2+ influx through NMDA (N-methyl-D-aspartate) receptors and then potentiates synaptic efficacy by inducing synaptic insertion and increased single-channel conductance of AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid) receptors. Here we show that regulated CaMKII interaction with two sites on the NMDA receptor subunit NR2B provides a mechanism for the glutamate-induced translocation of the kinase to the synapse in hippocampal neurons. This interaction can lead to additional forms of potentiation by: facilitated CaMKII response to synaptic Ca2+; suppression of inhibitory autophosphorylation of CaMKII; and, most notably, direct generation of sustained Ca2+/calmodulin (CaM)-independent (autonomous) kinase activity by a mechanism that is independent of the phosphorylation state. Furthermore, the interaction leads to trapping of CaM that may reduce down-regulation of NMDA receptor activity. CaMKII-NR2B interaction may be prototypical for direct activation of a kinase by its targeting protein.

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Crossref · 10.1038/35081080

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30 of 30 references verified0 citation errors · 0 not checkable

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  • CaMKII binding to GluN2B directly generates Ca2+-independent autonomous CaMKII activity.

    “This binding directly generates Ca2+-independent autonomous CaMKII activity”
  • Binding of the GluN2B subunit of the NMDAR to the CaMKII surface groove in place of the autoinhibitory domain allows autonomous activity without autophosphorylation.

    “A second mechanism proposed for generating autonomy involves binding of the GluN2B subunit of the NMDAR to the kinase surface groove in place of the autoinhibitory domain that allows for autonomous activity without autophosphorylation (78).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [78]

  • The CTD peptide may act like a wedge between the kinase and its regulatory segment, propping the enzyme in an open active conformation that persists as long as the CTD peptide is bound, even after Ca2+/CaM dissociates.

    “The CTD peptide may act like a wedge between the kinase and its regulatory segment, propping the enzyme in an open active conformation that persists as long as the CTD peptide is bound, even after Ca2+/CaM dissociates (FIGURE 2B6) (78).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [78]

  • The CaMKII-CTD complex is autonomously active after Ca2+/CaM removal.

    “Ca2+/CaM was then removed and when the CaMKII-CTD complex was assayed with substrate and ATP it was found to be autonomously active (78).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [78]

  • The CTD peptide induces constitutive activity of the T286A phosphonull mutant without T286P.

    “A similar finding was made with T286A, the phosphonull mutant, i.e., the CTD peptide induced constitutive activity without T286P.”

    From Synaptic memory and CaMKII (2023) · cites this paper as [78]

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Authors
Bayer, K.-U., De Koninck, P., Leonard, A. S., Hell, J. W., & Schulman, H.
Affiliations
  • Stanford Medicine (US)
  • University of Iowa (US)
Corresponding author
Bayer, K.-Ulrich
Venue
Nature
Published
2001-06
Volume
411
Issue
6839
Pages
801-805
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2007393704
Cited by
732
References
30
Citations by year
2026: 12 · 2025: 23 · 2024: 28 · 2023: 23 · 2022: 28 · 2021: 28 · 2020: 30 · 2019: 21 · 2018: 26 · 2017: 27 · 2016: 18 · 2015: 23 · 2014: 42 · 2013: 25 · 2012: 37
FWCI
12.97
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
CaMKII, NMDA receptor, NR2B subunit, kinase activation, synaptic plasticity, long-term potentiation, autophosphorylation, hippocampal neurons, glutamate signaling
MeSH terms
Animals, Calcium, Calmodulin, Cell Line, Enzyme Activation, Hippocampus, Neurons, Phosphorylation, Protein Binding, Protein Conformation, Recombinant Fusion Proteins, Receptors, N-Methyl-D-Aspartate, Calcium-Calmodulin-Dependent Protein Kinases, Rats, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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