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Starting the cell cycle: what's the point?

F R Cross1

  • 1Rockefeller University, New York, USA. fcross@rockvax.rockefeller.edu

Current Opinion in Cell Biology
|December 1, 1995
PubMed
Summary

Budding yeast cell cycle commitment, known as

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • The 'Start' transition in the budding yeast cell cycle signifies commitment to cell division.
  • Understanding the molecular mechanisms regulating Start is crucial for cell cycle control.
  • Previous research identified key regulatory events but lacked molecular detail.

Purpose of the Study:

  • To elucidate the molecular basis of the 'Start' transition in the budding yeast cell cycle.
  • To investigate the role of Cln-Cdc28 protein kinase complexes in cell cycle commitment.
  • To explore the functional specialization of the redundant CLN genes.

Main Methods:

  • Genetic analysis of CLN genes in budding yeast.
  • Biochemical assays to study Cln-Cdc28 protein kinase activity.
  • Cell cycle progression analysis.

Main Results:

  • The activation of Cln-Cdc28 protein kinase complexes is identified as the molecular basis of Start.
  • Cln-Cdc28 kinases regulate processes previously thought to occur after Start.
  • Evidence suggests functional specialization among the three redundant CLN genes.

Conclusions:

  • Cln-Cdc28 kinase activation is a central event in budding yeast cell cycle commitment.
  • These kinases have broader roles in cell cycle regulation than previously recognized.
  • The CLN genes exhibit specialized functions, contributing to cell cycle control diversity.

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