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Related Experiment Videos

Evolutionary conservation between budding yeast and human kinetochores.

K Kitagawa1, P Hieter

  • 1Department of Molecular Pharmacology, St Jude Children's Research Hospital, 332 North Lauderdale Street, Memphis, Tennessee 38105-2794, USA. katsumi.kitagawa@stjude.org

Nature Reviews. Molecular Cell Biology
|September 5, 2001
PubMed
Summary
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Accurate chromosome segregation relies on proper kinetochore assembly. Budding yeast studies reveal conserved kinetochore components essential for linking chromosomes to spindle microtubules during mitosis.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Accurate chromosome segregation is vital for cell division and preventing aneuploidy.
  • Kinetochores are crucial protein-DNA complexes that mediate chromosome-microtubule attachment.
  • The budding yeast Saccharomyces cerevisiae serves as a powerful model for studying fundamental cellular processes.

Purpose of the Study:

  • To identify and characterize novel components of the kinetochore in Saccharomyces cerevisiae.
  • To investigate the regulatory complexes associated with kinetochore assembly and function.
  • To determine the evolutionary conservation of these kinetochore components and their roles in humans.

Main Methods:

  • Genetic screening in Saccharomyces cerevisiae to identify mutants with defects in chromosome segregation.

Related Experiment Videos

  • Biochemical assays to characterize protein-protein interactions within kinetochore complexes.
  • Comparative genomics to assess the conservation of identified genes and proteins in other species, including humans.

    • Main Results:

    • Discovery of several functionally novel proteins involved in kinetochore assembly and function.
    • Identification of new regulatory complexes that modulate kinetochore-microtubule interactions.
    • Demonstration that many identified kinetochore components are conserved in humans, suggesting fundamental roles.

    Conclusions:

    • The budding yeast provides a valuable system for uncovering conserved mechanisms of chromosome segregation.
    • Novel kinetochore components identified in yeast have implications for understanding human cell division and related disorders.
    • Further research into these conserved elements can illuminate fundamental aspects of mitosis.