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Related Experiment Videos

Separase regulation during mitosis.

Frank Uhlmann1

  • 1Lincoln's Inn Fields Laboratories, Cancer Research UK, 44 Lincoln's Inn Fields, London WC2A 3PX, UK. frank.uhlmann@cancer.org.uk

Biochemical Society Symposium
|November 1, 2003
PubMed
Summary
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The cell division process relies on the precise splitting of chromosomes, regulated by the protease separase. This enzyme controls the cohesin complex, ensuring accurate genome distribution to daughter cells.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Chromosome segregation is a critical step in cell division, ensuring accurate genome distribution.
  • The metaphase-to-anaphase transition involves the irreversible splitting of sister chromatids.
  • Cohesin, a protein complex, maintains sister chromatid cohesion until anaphase.

Purpose of the Study:

  • To provide an overview of the regulatory mechanisms controlling separase activity.
  • To elucidate the regulation of the Scc1 subunit's susceptibility to cleavage.
  • To detail the key protease, separase, and its role in cell division.

Main Methods:

  • Review of existing literature on cell cycle regulation.
  • Analysis of protease function in chromosome segregation.

Related Experiment Videos

  • Examination of cohesin complex dynamics and regulation.

    • Main Results:

    • Separase (C50 family) is identified as the key protease regulating the metaphase-to-anaphase transition.
    • Cleavage of the Scc1 subunit of cohesin by separase triggers anaphase.
    • Multiple regulatory mechanisms control separase activity and Scc1 cleavage susceptibility.

    Conclusions:

    • The irreversible cleavage of Scc1 by separase is a tightly controlled process.
    • Understanding these regulatory layers is crucial for comprehending accurate genome distribution.
    • Dysregulation of this process can have significant implications for cell division fidelity.