Maintaining transcriptional homeostasis during cell cycle
Lucía Ramos-Alonso1, Pierre Chymkowitch
1Department of Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, Norway.
Transcription
|September 1, 2023
Summary
Maintaining cellular identity across cell division is crucial. This study explores gene expression and chromatin mechanisms, including yeast centromeres, that ensure transcriptional fidelity during cell replication and mitosis.
Area of Science:
- Cellular biology
- Epigenetics
- Molecular genetics
Background:
- Cellular identity relies on stable gene expression patterns throughout the cell cycle.
- Cell cycle progression, particularly DNA replication (S-phase) and mitosis, disrupts chromatin structure, accessibility, and epigenetic marks.
- Maintaining transcriptional patterns across cell generations faces challenges due to chromatin dynamics during cell division.
Purpose of the Study:
- To investigate gene expression and chromatin regulatory mechanisms preserving transcriptional identity during DNA replication and mitosis.
- To highlight the role of yeast centromeres and mitotic chromosomes in maintaining transcriptional fidelity.
Main Methods:
- Review of existing literature on gene expression and chromatin regulation during the cell cycle.
- Analysis of specific mechanisms involved in chromatin accessibility and epigenetic mark maintenance.
- Focus on recent findings concerning yeast centromeres and mitotic chromosomes.
Main Results:
- Specific gene expression and chromatin regulatory strategies enable the maintenance of transcriptional identity despite cell cycle-induced disruptions.
- Yeast centromeres and mitotic chromosomes play an unexpected role in preserving transcriptional fidelity beyond mitosis.
Conclusions:
- Cellular lineages depend on robust mechanisms to maintain gene expression patterns through cell division.
- Novel insights into the function of centromeres and mitotic chromosomes offer new perspectives on epigenetic inheritance and cellular memory.
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