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The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
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Manipulation and Analysis of Cell Cycle-Dependent Processes in Budding Yeast
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Cell cycle: deconstructing tension.

Andrea Musacchio1

  • 1Department of Experimental Oncology, European Institute of Oncology, Via Adamello 16, Milan, Italy.

Current Biology : CB
|August 10, 2010
PubMed
Summary
This summary is machine-generated.

Sister chromatids require tension for cell division, which is maintained by spindle checkpoint satisfaction. New research reveals how cells prevent checkpoint reactivation when sister chromatid cohesion is lost.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Sister chromatids must attach to microtubules and generate tension before anaphase to satisfy the spindle checkpoint.
  • Loss of sister chromatid cohesion is expected to reduce tension and potentially reactivate the spindle checkpoint.

Discussion:

  • Two recent studies investigate mechanisms cells employ to prevent spindle checkpoint reactivation after cohesion loss.
  • Understanding these mechanisms is crucial for comprehending cell cycle regulation and error prevention during mitosis.

Key Insights:

  • The spindle checkpoint ensures accurate chromosome segregation by monitoring kinetochore-microtubule attachments and tension.
  • Cells possess strategies to maintain checkpoint satisfaction even when sister chromatid cohesion is diminished, preventing mitotic errors.

Outlook:

  • Further research can explore the specific molecular players involved in maintaining tension and checkpoint satisfaction.
  • These findings could have implications for understanding aneuploidy and developing cancer therapies targeting cell division.