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arXiv 2108.01620q-bio.MNcond-mat.softcond-mat.stat-mechphysics.bio-ph
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具有非竞争性转录调控结构的随机基因转录

Stochastic gene transcription with non-competitive transcription regulatory architecture

Amit Kumar Das

摘要:

转录因子,如激活子和抑制子,可以以竞争或非竞争的方式与基因启动子相互作用。在本文中,我们构建了一个随机模型与非竞争性转录调控架构和发展的分析理论,重新建立实验结果与改进的数据拟合。理论中的解析表达式使我们能够研究系统的任何参数所对应的系统性质,从而使我们能够找出控制该体系结构的基因表达调节的因素。我们注意到,除了转录再启动和阻遏物之外,还有其他参数可以控制这个网络的噪声。我们还观察到,Fano因子(在mRNA水平上)从亚泊松区到超泊松区变化。除了上述属性,我们观察到一些异常的Fano因子(在mRNA水平上)和蛋白质的变化在较低的激活剂浓度的阻遏物分子的存在下的特征。这个模型是有用的,以了解架构的相互作用,可能会缓冲随机性固有的基因转录。

英文摘要:

The transcription factors, such as activators and repressors, can interact with the promoter of gene either in a competitive or non-competitive way. In this paper, we construct a stochastic model with non-competitive transcriptional regulatory architecture and develop an analytical theory that re-establishes the experimental results with an improved data fitting. The analytical expressions in the theory allow us to study the nature of the system corresponding to any of its parameters, and hence enable us to find out the factors that govern the regulation of gene expression for that architecture. We notice that, along with transcriptional reinitiation and repressors, there are other parameters that can control the noisiness of this network. We also observe that, the Fano factor (at mRNA level) varies from sub-Poissonian regime to superPoissonian regime. In addition to the aforementioned properties, we observe some anomalous characteristics of the Fano factor (at mRNA level) and that of the variance of protein at lower activator concentrations in presence of repressor molecules. This model is useful to understand the architecture of interactions which may buffer the stochasticity inherent to gene transcription.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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