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Related Experiment Videos

The extracellular signal-regulated kinase: multiple substrates regulate diverse cellular functions.

Seunghee Yoon1, Rony Seger

  • 1Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel.

Growth Factors (Chur, Switzerland)
|January 6, 2006
PubMed
Summary

The extracellular signal-regulated kinase (ERK) pathway regulates cell growth and division. This review details its complex components and over 160 substrates involved in diverse cellular functions.

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Area of Science:

  • Cellular Biology
  • Molecular Signaling
  • Biochemistry

Background:

  • The extracellular signal-regulated kinase (ERK) cascade is a pivotal signaling pathway.
  • It regulates fundamental cellular processes including proliferation, differentiation, and cell cycle progression.
  • Signaling occurs through sequential phosphorylation and activation of protein kinases.

Purpose of the Study:

  • To review the complexity of the ERK cascade.
  • To detail the multiplicity of ERK substrates and their functions.
  • To elucidate the diverse cellular processes regulated by ERK signaling.

Main Methods:

  • Literature review of the ERK signaling pathway.
  • Compilation and description of known ERK substrates (approximately 160).

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  • Analysis of substrate localization (nuclear, cytosolic, organellar) and functions.

    • Main Results:

    • The ERK cascade involves core components (Raf, MEK1/2, ERK1/2, RSKs) and alternative forms, enhancing complexity.
    • Approximately 160 substrates for ERK have been identified.
    • Substrates participate in transcription regulation, translation, mitosis, and apoptosis, localized in nucleus, cytosol, and organelles.

    Conclusions:

    • The ERK cascade's complexity, driven by alternative components and numerous substrates, enables diverse cellular functions.
    • Understanding ERK substrates and their mechanisms provides insight into both distinct and opposing cellular processes.
    • This pathway is crucial for a wide array of cellular activities, from gene expression to cell division and death.