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Related Experiment Videos

Basic mechanism of eukaryotic chromosome segregation.

Mitsuhiro Yanagida1

  • 1Department of Gene Mechanisms, Graduate School of Biostudies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan. yanagida@kozo.lif.kyoto-u.ac.jp

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|May 18, 2005
PubMed
Summary

Chromosome segregation mechanisms are conserved across eukaryotes and even share features with prokaryotes. Key molecular players and cell cycle controls ensure accurate DNA distribution during cell division.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Chromosome segregation is a fundamental process for cell division, ensuring accurate distribution of genetic material.
  • The cell cycle control system, involving protein modification and degradation, is intricately linked to chromosome segregation.
  • Conserved genes and molecular players suggest a shared evolutionary basis for this process across diverse life forms.

Purpose of the Study:

  • To elucidate the conserved mechanisms of chromosome segregation in eukaryotes and prokaryotes.
  • To discuss the roles of key molecular players involved in chromosome segregation.
  • To describe the formation of the centromere/kinetochore complex.

Main Methods:

  • Comparative analysis of genes and proteins involved in chromosome segregation across different species.

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  • Review of literature on cell cycle control, protein modification, and proteolysis in relation to chromosome segregation.
  • Examination of the functions of key players like SMC complexes, topoisomerase II, and APC/C.

    • Main Results:

    • Evidence confirms conserved basic mechanisms of chromosome segregation in eukaryotes, utilizing similar genes.
    • Prokaryotic chromosome segregation shares fundamental similarities with eukaryotic processes.
    • Key players identified include cohesin, condensin, DNA topoisomerase II, APC/C, securin-separase, and aurora passengers.

    Conclusions:

    • The fundamental process of chromosome segregation is highly conserved across eukaryotes and shows similarities to prokaryotes.
    • Cell cycle control, including precise protein modification and degradation, is critical for accurate segregation.
    • Understanding the roles of conserved molecular players and centromere/kinetochore formation is essential for comprehending cell division.