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The morphogenesis checkpoint: how yeast cells watch their figures.
1Department of Pharmacology and Cancer Biology, Box 3813, Duke University Medical Center, Durham, NC 27710, USA. daniel.lew@duke.edu
Current Opinion in Cell Biology
|December 4, 2003
Summary
The yeast morphogenesis checkpoint ensures cell division aligns with bud formation by regulating Swe1p. Cell shape changes during budding control Swe1p degradation, linking cell growth to the cell cycle.
Area of Science:
- Cell Biology
- Molecular Biology
- Yeast Genetics
Background:
- The morphogenesis checkpoint coordinates cell cycle progression with bud formation in yeast.
- This checkpoint involves the regulation of Swe1p, a Wee1 homolog, to control cell cycle arrest.
- Previous studies suggest monitoring of actin, septin, bud presence, and bud size.
Purpose of the Study:
- To review evidence for various morphogenesis checkpoint monitoring mechanisms.
- To highlight recent findings on the regulation of Swe1p degradation.
- To establish the link between cell shape change and Swe1p regulation.
Main Methods:
- Review of existing scientific literature and studies.
- Analysis of experimental data related to yeast cell cycle and morphogenesis.
- Focus on genetic and molecular mechanisms controlling Swe1p.
Main Results:
- Evidence supports the checkpoint's role in monitoring actin and septin organization, bud presence, and size.
- Recent findings indicate Swe1p degradation is a key regulatory event.
- Cell shape change accompanying bud emergence directly controls Swe1p degradation.
Conclusions:
- The morphogenesis checkpoint is crucial for coordinating cell growth and division.
- Cell shape changes during budding are a critical signal for regulating Swe1p.
- This regulation ensures proper cell cycle progression relative to morphogenesis.