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Ribosomal proteins in cell proliferation and apoptosis.

F W Chen1, Y A Ioannou

  • 1Department of Human Genetics, Mount Sinai School of Medicine, New York, NY 10029, USA.

International Reviews of Immunology
|February 15, 2000
PubMed
Summary
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Ribosomal proteins, like L13a, regulate cell proliferation and survival. Some ribosomal proteins act as cell cycle checkpoints, inducing apoptosis and impacting cell growth.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Ribosomal proteins primarily synthesize proteins for cell homeostasis.
  • Emerging evidence indicates secondary roles for ribosomal proteins beyond biosynthesis.
  • These roles include regulating cell proliferation and inducing cell death.

Purpose of the Study:

  • To investigate the non-biosynthetic functions of ribosomal proteins.
  • To explore the role of ribosomal protein L13a in cell cycle regulation and apoptosis.
  • To determine if ribosomal proteins constitute a new family of cell proliferation regulators.

Main Methods:

  • Studying human ribosomal protein L13a expression and inhibition.
  • Utilizing homologous recombination in Saccharomyces cerevisiae to inactivate yeast homologues (rp22, rp23).

Related Experiment Videos

  • Analyzing cell cycle arrest (G1, G2/M) and apoptosis induction.

    • Main Results:

    • Human ribosomal protein L13a expression induces apoptosis, arresting cells in G2/M.
    • Inhibiting L13a expression also triggers apoptosis, highlighting its necessity for cell survival.
    • Yeast homologues rp22 and rp23 inactivation leads to growth retardation and death.
    • Ribosomal protein L7 arrests cells in G1 and induces apoptosis.

    Conclusions:

    • Ribosomal proteins play critical roles in cell cycle control and apoptosis.
    • A subset of ribosomal proteins functions as cell cycle checkpoints.
    • These proteins represent a novel family of cell proliferation regulators.