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arXiv 1404.5345q-bio.MN
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随机基因调控网络的类属性质

Generic Properties of Random Gene Regulatory Networks

Zhiyuan Li, Simone Bianco, Zhaoyang Zhang, Chao Tang

摘要:

基因调控网络(GRNs)的建模是系统生物学的一个重要课题。虽然已经有很多工作集中在各种特定的系统,具有连续变量的广义随机网络的一般行为仍然是难以捉摸的。特别是吸引子如何在稳态、周期和混沌三种轨道之间进行划分,以及网络的动力学性质如何随网络的拓扑特征而变化,目前尚不清楚。在这项工作中,我们首先研究了这些问题的随机GRNs与不同的网络大小,连接,抑制链接和转录调控规则的分数。然后,我们寻找控制大型GRNs动态行为的核心基序。我们表明,一个随机GRN的稳定性通常是由一些嵌入图案的小尺寸,因此可以在一般情况下理解这些短图案的上下文中。我们的研究结果为遗传网络的研究和设计提供了见解。

英文摘要:

Modeling gene regulatory networks (GRNs) is an important topic in systems biology. Although there has been much work focusing on various specific systems, the generic behavior of GRNs with continuous variables is still elusive. In particular, it is not clear typically how attractors partition among the three types of orbits: steady state, periodic and chaotic, and how the dynamical properties change with network's topological characteristics. In this work, we first investigated these questions in random GRNs with different network sizes, connectivity, fraction of inhibitory links and transcription regulation rules. Then we searched for the core motifs that govern the dynamic behavior of large GRNs. We show that the stability of a random GRN is typically governed by a few embedding motifs of small sizes, and therefore can in general be understood in the context of these short motifs. Our results provide insights for the study and design of genetic networks.

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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