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arXiv 1301.4567q-bio.MNcond-mat.stat-mech
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细胞周期遗传网络的边使用、基序和调控逻辑

Edge usage, motifs and regulatory logic for cell cycling genetic networks

M. Zagorski, A. Krzywicki, O. C. Martin

摘要:

细胞周期是一个严格控制的过程,但其潜在的遗传网络显示出物种之间的显着差异。哪种相关的结构特征仅仅来自于施加适当的基因表达模式的能力?我们通过检查满足产生给定序列的基因表达的约束的所有调控网络的集合来解决这个问题。我们集中在三个细胞周期的档案来自面包酵母,裂殖酵母和哺乳动物。首先,我们展示了每个集合中的网络只使用了一些交互,这些交互被反复重用为构建块。第二,我们发现了一个丰富的网络模体,这是在两个酵母细胞周期系统的调查相似。这些基序没有自主功能,但它们揭示了基于激活相互作用的前馈级联的细胞周期调控逻辑。

英文摘要:

The cell cycle is a tightly controlled process, yet its underlying genetic network shows marked differences across species. Which of the associated structural features follow solely from the ability to impose the appropriate gene expression patterns? We tackle this question in silico by examining the ensemble of all regulatory networks which satisfy the constraint of producing a given sequence of gene expressions. We focus on three cell cycle profiles coming from baker's yeast, fission yeast and mammals. First, we show that the networks in each of the ensembles use just a few interactions that are repeatedly reused as building blocks. Second, we find an enrichment in network motifs that is similar in the two yeast cell cycle systems investigated. These motifs do not have autonomous functions, but nevertheless they reveal a regulatory logic for cell cycling based on a feed-forward cascade of activating interactions.

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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