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arXiv 1902.07129q-bio.MNcond-mat.stat-mechq-bio.BMq-bio.CBq-bio.QM
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热力学在代谢网络建模中的重要作用:物理见解和计算挑战

The Essential Role of Thermodynamics in metabolic network modeling: physical insights and computational challenges

A. De Martino, D. De Martino, E. Marinari

摘要:

细胞代谢的定量研究通常基于大型化学反应网络模型。稳态方法适合于分析细胞生长时间尺度上的现象,并避免了动力学定律和参数的不完整实验知识的问题,但它应得到正确实施热力学约束的支持。在这篇文章中,我们回顾了后者,强调其计算挑战和物理见解。吉布斯不等式的简单引入避免了允许正确的时间尺度分析的不可行循环的存在,但可能导致非凸可行通量空间,其探索需要有效的算法。本文简要回顾了热力学在代谢网络约束模型中的应用。

英文摘要:

Quantitative studies of cell metabolism are often based on large chemical reaction network models. A steady state approach is suited to analyze phenomena on the timescale of cell growth and circumvents the problem of incomplete experimental knowledge on kinetic laws and parameters, but it shall be supported by a correct implementation of thermodynamic constraints. In this article we review the latter aspect highlighting its computational challenges and physical insights. The simple introduction of Gibbs inequalities avoids the presence of unfeasible loops allowing for correct timescale analysis but leads to possibly non-convex feasible flux spaces, whose exploration needs efficient algorithms. We shorty review on the implementation of thermodynamics through variational principles in constraints based models of metabolic 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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