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Human Zw10 and ROD are mitotic checkpoint proteins that bind to kinetochores

G K Chan1, S A Jablonski, D A Starr

  • 1Fox Chase Cancer Center, 7701 Burholme Avenue, Philadelphia, Pennsylvania 19111, USA.

Nature Cell Biology
|January 9, 2001
PubMed

Insights

Human Zeste White 10 (Zw10) and Rough deal (Rod) are vital for the mitotic checkpoint. Cells lacking these proteins fail to arrest in mitosis, leading to errors during cell division.

Area of Science:

  • Cell Biology
  • Genetics
  • Molecular Biology

Background:

  • The mitotic checkpoint ensures accurate chromosome segregation.
  • Kinetochore proteins play a crucial role in this process.

Purpose of the Study:

  • To investigate the role of human Zeste White 10 (Zw10) and Rough deal (Rod) in the mitotic checkpoint.
  • To understand the implications of Zw10 and Rod deficiency in cell division.

Main Methods:

  • Utilized cell biology techniques to study human cells lacking Zw10 and Rod.
  • Observed cellular responses to microtubule inhibitors.

Main Results:

  • Human Zw10 and Rod were identified as new components of the mitotic checkpoint.
  • Cells deficient in hZw10 and hRod failed to arrest in mitosis upon exposure to microtubule inhibitors.
  • Defective cells exhibited premature mitotic exit and lagging chromosomes during division.

Conclusions:

  • Metazoans may require an elaborate spindle checkpoint for complex kinetochore functions.
  • Zw10 and Rod are essential for proper mitotic arrest and chromosome segregation in human cells.

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