Single-cell analysis of transcription kinetics across the cell cycle
- PMID: 26824388
- PMCID: PMC4801054
- DOI: 10.7554/eLife.12175
Single-cell analysis of transcription kinetics across the cell cycle
Abstract
Transcription is a highly stochastic process. To infer transcription kinetics for a gene-of-interest, researchers commonly compare the distribution of mRNA copy-number to the prediction of a theoretical model. However, the reliability of this procedure is limited because the measured mRNA numbers represent integration over the mRNA lifetime, contribution from multiple gene copies, and mixing of cells from different cell-cycle phases. We address these limitations by simultaneously quantifying nascent and mature mRNA in individual cells, and incorporating cell-cycle effects in the analysis of mRNA statistics. We demonstrate our approach on Oct4 and Nanog in mouse embryonic stem cells. Both genes follow similar two-state kinetics. However, Nanog exhibits slower ON/OFF switching, resulting in increased cell-to-cell variability in mRNA levels. Early in the cell cycle, the two copies of each gene exhibit independent activity. After gene replication, the probability of each gene copy to be active diminishes, resulting in dosage compensation.
Keywords: chromosomes; computational biology; fluorescence in situ; genes; mathematical modeling; mouse; single cell; single molecule; stochastic gene expression; systems biology; theory.
Conflict of interest statement
The authors declare that no competing interests exist.
Figures
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Comment in
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Bursting through the cell cycle.Elife. 2016 Mar 7;5:e14953. doi: 10.7554/eLife.14953. Elife. 2016. PMID: 26950945 Free PMC article.
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