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Regulation of cell division: stop the SIN!

Ulrike Gruneberg1, Erich A Nigg

  • 1Max-Planck-Institute for Biochemistry, Am Klopferspitz 18a, 82152 Martinsried, Germany. gruenebe@biochem.mpg.de

Trends in Cell Biology
|April 2, 2003
PubMed

Insights

A novel mechanism involving Polo-like kinase Plo1p and Dma1p protein prevents cell division during spindle checkpoint activation. This ensures proper chromosome segregation before cell completion.

Area of Science:

  • Cell biology
  • Molecular biology
  • Genetics

Background:

  • Cytokinesis is essential for cell division.
  • The spindle checkpoint ensures accurate chromosome segregation.
  • Regulation of cytokinesis during checkpoint activation is critical.

Purpose of the Study:

  • To elucidate the mechanism preventing cytokinesis when the spindle checkpoint is active.
  • To identify key proteins involved in this regulatory process.

Main Methods:

  • Utilized genetic and molecular biology techniques.
  • Investigated the roles of Polo-like kinase Plo1p and Dma1p protein.

Main Results:

  • Identified a novel mechanism involving Plo1p and Dma1p.
  • Demonstrated that this mechanism inhibits cytokinesis during spindle checkpoint activation.
  • Dma1p protein possesses a RING finger and an FHA-domain.

Conclusions:

  • Plo1p and Dma1p form a complex that acts as a safeguard.
  • This mechanism prevents premature cytokinesis, ensuring genomic stability.

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