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Related Experiment Videos

Phosphorylation of calmodulin. Functional implications.

Gustavo Benaim1, Antonio Villalobo

  • 1Instituto de Biología Experimental, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela.

European Journal of Biochemistry
|August 3, 2002
PubMed
Summary

Calmodulin (CaM) phosphorylation by various kinases alters its function, impacting cell physiology. This review details CaM phosphorylation events, their effects on CaM activity, and cellular consequences.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Signaling

Background:

  • Calmodulin (CaM) is a key calcium-binding protein involved in numerous cellular processes.
  • CaM is regulated by post-translational modifications, including phosphorylation.
  • Phosphorylation of CaM by various kinases has been reported both in vitro and in vivo.

Purpose of the Study:

  • To review the progress in understanding Calmodulin (CaM) phosphorylation.
  • To describe phosphorylation events mediated by different protein kinases.
  • To highlight the functional repercussions of CaM phosphorylation in cell physiology.

Main Methods:

  • Literature review of studies on CaM phosphorylation.
  • Analysis of in vitro and in vivo phosphorylation data.

Related Experiment Videos

  • Examination of CaM-dependent systems and cellular responses.

    • Main Results:

    • CaM is phosphorylated by multiple protein-serine/threonine kinases (e.g., Casein kinase II, myosin light-chain kinase) and protein-tyrosine kinases (e.g., insulin receptor, Src family kinases).
    • Phosphorylated CaM species exhibit differential actions compared to nonphosphorylated CaM.
    • CaM phosphorylation leads to significant physiological consequences and altered CaM activity.

    Conclusions:

    • CaM phosphorylation is a critical regulatory mechanism with diverse functional outcomes.
    • Understanding CaM phosphorylation provides insights into cellular signaling pathways.
    • This review consolidates knowledge on CaM phosphorylation, emphasizing its physiological relevance.