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Regulation of protein kinase C: a tale of lipids and proteins

A F Quest1

  • 1Institute of Biochemistry, University of Lausanne, Epalinges, Switzerland.

Enzyme & Protein
|January 1, 1996
PubMed

Insights

Protein kinase C (PKC) is a key signaling enzyme family. This review details how PKC activation involves releasing autoinhibitory domains and requires post-translational phosphorylation for full function.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Protein kinase C (PKC) is a crucial family of serine/threonine kinases.
  • PKC enzymes are involved in intracellular signaling pathways activated by various agonists.
  • Eleven mammalian isoforms exist, categorized into calcium-dependent, non-calcium-dependent, and atypical groups.

Purpose of the Study:

  • To summarize the mechanisms of Protein kinase C (PKC) activation.
  • To discuss the role of regulatory domains, lipids, and proteins in PKC activation.
  • To review the significance of post-translational phosphorylation in converting PKC to an active state.

Main Methods:

  • This is a review article, synthesizing existing research on PKC.
  • Literature review focusing on molecular interactions and post-translational modifications.
  • Analysis of structural and functional data related to PKC isoforms.

Main Results:

  • PKC isoforms share an autoinhibitory mechanism where the regulatory domain inactivates the catalytic domain.
  • PKC activation necessitates the release of this autoinhibitory restraint.
  • Lipid and protein interactions, alongside post-translational phosphorylation, are critical for achieving an activation-competent state.

Conclusions:

  • Understanding PKC activation mechanisms is vital for deciphering cellular signaling.
  • Post-translational modifications are essential for regulating PKC activity.
  • Further research into PKC regulation could yield therapeutic insights.

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