arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1101.2175q-bio.MNcond-mat.softcond-mat.stat-mech
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具有分子记忆和爆发的基因表达随机模型中的固有噪声

Intrinsic noise in stochastic models of gene expression with molecular memory and bursting

Tao Jia, Rahul V. Kulkarni

摘要:

基因表达中的内在噪声调节对于许多细胞功能是必不可少的。相应地,人们对理解基因表达的不同分子机制如何影响细胞群体中蛋白质水平的变化非常感兴趣。在这项工作中,我们分析了突发性基因表达的随机模型,认为一般的等待时间分布的到达和衰减的蛋白质。通过映射系统的模型分析在混沌理论,我们推导出的解析表达式的噪声在稳态蛋白质分布。衍生的结果扩展了以前的工作,包括任意概率分布的影响,代表分子记忆和爆裂的影响。获得的分析表达式提供了对转录、转录后和翻译后机制在控制基因表达中噪音中的作用的深入了解。

英文摘要:

Regulation of intrinsic noise in gene expression is essential for many cellular functions. Correspondingly, there is considerable interest in understanding how different molecular mechanisms of gene expression impact variations in protein levels across a population of cells. In this work, we analyze a stochastic model of bursty gene expression which considers general waiting-time distributions governing arrival and decay of proteins. By mapping the system to models analyzed in queueing theory, we derive analytical expressions for the noise in steady-state protein distributions. The derived results extend previous work by including the effects of arbitrary probability distributions representing the effects of molecular memory and bursting. The analytical expressions obtained provide insight into the role of transcriptional, post-transcriptional and post-translational mechanisms in controlling the noise in gene expression.

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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