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Related Experiment Videos

Cytosolic phospholipase A2

J D Clark1, A R Schievella, E A Nalefski

  • 1Small Molecule Drug Discovery Group, Genetics Institute, Cambridge, MA 0214, USA.

Journal of Lipid Mediators and Cell Signalling
|October 1, 1995
PubMed
Summary
This summary is machine-generated.

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Cytosolic phospholipase A2 (cPLA2) activation is tightly regulated by calcium (Ca2+) and MAP kinase-dependent phosphorylation. Full cPLA2 activation requires both membrane translocation and phosphorylation for rapid and prolonged cellular responses like inflammation.

Area of Science:

  • Biochemistry
  • Cellular Biology
  • Molecular Signaling

Background:

  • Cytosolic phospholipase A2 (cPLA2) plays a critical role in cellular processes, including inflammation.
  • Its activity is modulated by intracellular signaling pathways.

Purpose of the Study:

  • To present a comprehensive model for the regulation of cPLA2 activation.
  • To elucidate the rapid and prolonged mechanisms controlling cPLA2 activity.

Main Methods:

  • Literature review and synthesis of previous studies.
  • Proposed a regulatory model based on existing research.

Main Results:

  • cPLA2 activation is a multi-step process involving intracellular Ca2+ concentration and MAP kinase phosphorylation.

Related Experiment Videos

  • Rapid activation requires Ca2+-dependent translocation to the membrane and phosphorylation at Ser-505.
  • Delayed regulation involves changes in cPLA2 protein levels via transcriptional and post-transcriptional mechanisms.

    • Conclusions:

    • Full cPLA2 activation necessitates both membrane translocation and phosphorylation for effective cellular signaling.
    • The intricate regulation of cPLA2 allows for both rapid and sustained cellular responses, particularly in inflammatory pathways.