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arXiv 0802.1989q-bio.MN
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基因调控网络的结构与动力学

The Structure and Dynamics of Gene Regulation Networks

Murat Tuğrul

摘要:

典型的生物系统的结构和动力学是复杂的,这是由于其组成部分之间的强烈和不均匀的相互作用。用经典的数学工具,如动力学微分方程来研究这类系统并不总是合适的。在这种情况下,图论模型可以作为一个粗糙但强大的工具。在这篇论文中,我首先考虑生物系统的网络建模。拓扑和动态调查工具的开发和应用到各种模型网络。特别地,对于模型网络,探索了吸引子特征随系统大小和分布的缩放。此外,理论上的鲁棒性表达式进行了讨论和计算研究进行了验证。本论文的主要研究内容是利用同步确定性更新的布尔网络模型来研究基因表达的转录调控。我探索的吸引子结构和鲁棒性的已知的相互作用网络的酵母,酿酒酵母和比较模型网络。此外,我讨论了最近的一个模型,声称一个可能的根源的拓扑结构的酵母的基因调控网络和动态调查这个模型。论文还包括另一项研究,研究了折叠动力学与一种新的网络表示法之间的关系,即蛋白质天然结构的不相容性网络。我证明了这些网络的传统拓扑方面与phi值在统计上不相关,因为可用的数据有限。

英文摘要:

The structure and dynamics of a typical biological system are complex due to strong and inhomogeneous interactions between its constituents. The investigation of such systems with classical mathematical tools, such as differential equations for their dynamics, is not always suitable. The graph theoretical models may serve as a rough but powerful tool in such cases. In this thesis, I first consider the network modeling for the representation of the biological systems. Both the topological and dynamical investigation tools are developed and applied to the various model networks. In particular, the attractor features' scaling with system size and distributions are explored for model networks. Moreover, the theoretical robustness expressions are discussed and computational studies are done for confirmation. The main biological research in this thesis is to investigate the transcriptional regulation of gene expression with synchronously and deterministically updated Boolean network models. I explore the attractor structure and the robustness of the known interaction network of the yeast, Saccharomyces Cerevisiae and compare with the model networks. Furthermore, I discuss a recent model claiming a possible root to the topology of the yeast's gene regulation network and investigate this model dynamically. The thesis also included another study which investigates a relation between folding kinetics with a new network representation, namely, the incompatibility network of a protein's native structure. I showed that the conventional topological aspects of these networks are not statistically correlated with the phi-values, for the limited data that is available.

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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