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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
Summary
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.