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Cell cycle control of gene expression in yeast
1Laboratory of Yeast Genetics, National Institute for Medical Research, The Ridgeway, Mill Hill, London, UK NW7 1AA.
Trends in Cell Biology
|December 1, 1992
Summary
Cell cycle gene expression is vital for control, with many yeast genes regulated during transitions. The SW16 protein is key to controlling G1-S transition gene expression, potentially acting as a transcription factor.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Cell-cycle-regulated gene expression is increasingly recognized as fundamental to cell cycle control.
- In budding yeast, approximately 250 genes (3-4% of the total) exhibit cell-cycle-regulated expression patterns.
Purpose of the Study:
- To investigate the regulatory mechanisms governing cell-cycle-regulated gene expression in budding yeast.
- To identify key factors involved in the G1-S transition gene expression.
Main Methods:
- Analysis of gene expression patterns during the cell cycle in budding yeast.
- Identification of regulatory proteins and pathways involved in cell cycle control.
Main Results:
- A significant group of genes is expressed at the G1-S transition, including cyclin genes that regulate p34(CDC28) protein kinase.
- These G1-S transition genes are controlled by two distinct systems in late G1 phase.
- The SW16 protein is a common component of these regulatory systems and may function as a cell cycle stage-specific transcription factor.
Conclusions:
- Cell cycle stage-specific transcription factors, such as SW16, are critical for precise control of gene expression during cell cycle transitions.
- Understanding these regulatory networks provides insights into fundamental mechanisms of cell proliferation and DNA replication.
- The coordinated regulation of cyclin and DNA synthesis genes at the G1-S transition is essential for accurate cell cycle progression.