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Dynamical Regulation of mRNA Distribution by Cross-Talking Signaling Pathways

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  • Chunjuan Zhu
  • Guosheng Han
  • Feng Jiao

Abstract

Gene transcription is a random process in single cells manifested by the observed distribution of mRNA copy numbers in homogeneous cell populations. A central question is to understand how mRNA distribution is modulated under environmental changes. In this work, we initiate a theoretical study on mRNA distribution dynamics for the stochastic transcription model that involves cross-talking signaling pathways to direct gene activation in response to external signals. We first express the distribution in mathematical dynamical formulas under both moderate and high transcriptional upregulations. In each scenario, our further numerical examples display an observed dynamical transition type among three distribution modes for stress genes in yeast. In particular, the intermediate bimodal stage sustains within a certain length of early time and lasts much longer than that generated by the single pathway. This shows the general and robust bimodal transcription regulated by the cross-talk of signaling pathways.

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  • Chunjuan Zhu & Guosheng Han & Feng Jiao, 2020. "Dynamical Regulation of mRNA Distribution by Cross-Talking Signaling Pathways," Complexity, Hindawi, vol. 2020, pages 1-11, June.
    • Handle: RePEc:hin:complx:6402703
    DOI: 10.1155/2020/6402703
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