arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2307.03057q-bio.MNq-bio.BM
收藏

随机基因调控网络中修正的Hill函数

Corrected Hill Function in Stochastic Gene Regulatory Networks

Manuel Eduardo Hernández-García, Jorge Velázquez-Castro

AI总结:

本文针对随机生物电路中酶促反应涨落不可忽略的情况,从完整反应主方程推导了随机版本的Hill函数,并通过浓度均值附近的级数展开对确定性Hill函数进行修正,发现基因调控网络倾向速率的变异性具有非线性效应,可降低mRNA和蛋白质浓度的内在涨落。

摘要:

描述随机生物电路中的反应速率,通常通过直接将确定性推导的Hill函数引入主方程来实现。然而,当酶促反应速率的涨落不可忽略时,必须考虑所有涉及的随机反应来推导Hill函数。在本研究中,我们从导致Hill函数反应速率的完整反应集合的主方程中,推导了随机版本的Hill函数。我们在浓度平均值附近进行了级数展开,从而找到了确定性Hill函数的修正项。这一过程使我们能够量化酶促反应的涨落。我们发现,基因调控网络倾向速率的潜在变异性具有重要的非线性效应,能够降低mRNA和蛋白质浓度的内在涨落。

英文摘要:

Describing reaction rates in stochastic bio-circuits is commonly done by directly introducing the deterministically deduced Hill function into the master equation. However, when fluctuations in enzymatic reaction rates are not neglectable, the Hill function must be derived, considering all the involved stochastic reactions. In this work, we derived the stochastic version of the Hill function from the master equation of the complete set of reactions that, in the macroscopic limit, lead to the Hill function reaction rate. We performed a series expansion around the average values of the concentrations, which allowed us to find corrections for the deterministic Hill function. This process allowed us to quantify the fluctuations of enzymatic reactions. We found that the underlying variability in propensity rates of gene regulatory networks has an important non-linear effect that reduces the intrinsic fluctuations of the mRNA and protein concentrations.

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。

↑