Cellular Memory Markers in Gene Transcription During Mitosis
Author Information
Author(s): Xin Li, Zhou Guo-Ling, Song Wei, Wu Xue-Song, Wei Gong-Hong, Hao De-Long, Lv Xiang, Liu De-Pei, Liang Chih-Chuan
Primary Institution: National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China
Hypothesis
Do eukaryotic cells preserve some epigenetic marks on mitotic chromosomes to maintain their gene expression states?
Conclusion
Certain protein factors and active histone modifications act as cellular memory markers for competent and active genes during mitosis.
Supporting Evidence
- NF-E2p45 remains associated with globin gene loci during mitosis.
- GATA-1 is removed from mitotic chromosomes.
- Active histone modifications are preserved on mitotic chromosomes.
- Histone modifications correlate with transcriptional competence.
- Certain transcription factors serve as bookmarks for gene expression.
Takeaway
This study shows that cells remember which genes are active even when they divide, using special proteins and chemical tags on their DNA.
Methodology
The study used murine erythroleukemia (MEL) cells to analyze the retention of transcription factors and histone modifications during mitosis.
Digital Object Identifier (DOI)
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