Cited by 615Protein Kinase Regulation and GTPase SignalingSignaling Pathways in DiseaseNeuroscience and Neuropharmacology Research

Structure–function of the multifunctional Ca2+/calmodulin-dependent protein kinase II

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HUDMON, Andy, SCHULMAN, Howard·2002·Biochemical Journal

Abstract

Ca2+/calmodulin (CaM)-dependent protein kinase (CaMKII) is a ubiquitous mediator of Ca2+-linked signalling that phosphorylates a wide range of substrates to co-ordinate and regulate Ca2+-mediated alterations in cellular function. The transmission of information by the kinase from extracellular stimuli and the intracellular Ca2+ rise is not passive. Rather, its multimeric structure and autoregulation enable this enzyme to participate actively in the sensitivity, timing and location of its action. CaMKII can: (i) be activated in a Ca2+-spike frequency-dependent manner; (ii) become independent of its initial Ca2+/CaM activators; and (iii) undergo a 'molecular switch-like' behaviour, which is crucial for certain forms of learning and memory. CaMKII is derived from a family of four homologous but distinct genes, with over 30 alternatively spliced isoforms described at present. These isoforms possess diverse developmental and anatomical expression patterns, as well as subcellular localization. Six independent catalytic/autoregulatory domains are connected by a narrow stalk-like appendage to each hexameric ring within the dodecameric structure. Ca2+/CaM binding activates the enzyme by disinhibiting the autoregulatory domain; this process initiates an intra-holoenzyme autophosphorylation reaction that induces complex changes in the enzyme's sensitivity to Ca2+/CaM, including the generation of Ca2+/CaM-independent (autonomous) activity and marked increase in affinity for CaM. The role of CaMKII in Ca2+ signal transduction is shaped by its autoregulation, isoenzymic type and subcellular localization. The molecular determinants and mechanisms producing these processes are discussed as they relate to the structure-function of this multifunctional protein kinase.

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  1. Schulman, H. and Braun, A. (1999) Ca 2 + /calmodulin protein kinases. In Calcium as a Cellular Regulator (Carafoli, E. and Klee, C., eds.), pp. 311-343, Oxford University Press, New York, NY 12
  2. Kemp, B. E., Faux, M. C., Means, A. R., House, C., Tiganis, T., Hu, S.-H. and Mitchelhill, K. I. (1994) Structural aspects : pseudosubstrate and substrate interactions. In Protein Kinases (Woodgett, J. R., ed.), pp. 30-67, Oxford University Press, Oxford 45
  3. Bradshaw, J., Hudmon, A. and Schulman, H. (2002) Chemical quench flow kinetic studies indicate an intraholoenzyme autophosphorylation mechanism for Ca 2 + /calmodulin-dependent protein kinase II. J. Biol. Chem, in the press 118
  4. Lledo, P.-M., Hjelmstad, G. O., Mukherji, S., Soderling, T. R., Malenka, R. C. and Nicoll, R. A. (1995) Calcium/calmodulin-dependent kinase II and long-term potentiation enhance synaptic transmission by the same mechanism. Proc. Natl. Acad. Sci. U.S.A. 92, 11175-11179 127
  5. Hardie, G. and Hanks, S. (1995) The protein kinase facts book : protein-tyrosine kinases, vol. 2, Academic Press, Harcourt Brace and Company, London 210

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Authors
HUDMON, A., & SCHULMAN, H.
Affiliations
Stanford Medicine (US)
Venue
Biochemical Journal
Published
2002-06-15
Volume
364
Issue
3
Pages
593-611
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W2033844584
Cited by
615
References
213
Citations by year
2026: 15 · 2025: 18 · 2024: 23 · 2023: 23 · 2022: 16 · 2021: 22 · 2020: 24 · 2019: 20 · 2018: 28 · 2017: 12 · 2016: 20 · 2015: 34 · 2014: 32 · 2013: 30 · 2012: 42
FWCI
1.88
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Texas Health Science Center at Houston
  • National Institutes of Health (2r01gm040600-10)
  • National Institute of General Medical Sciences (GM40600, GM 30179)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
CaMKII, calcium/calmodulin-dependent protein kinase, structure functions, autophosphorylation, autoregulation, CaMKII isoforms, alternative splicing, learning and memory, subcellular localization
MeSH terms
Animals, Cell Physiological Phenomena, Homeostasis, Humans, Learning, Memory, Phosphorylation, Calcium-Calmodulin-Dependent Protein Kinases, Calcium Signaling, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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