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arXiv 1304.7992q-bio.MNcs.CEmath.OC
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紧致上下文特定代谢网络模型的快速重构

Fast Reconstruction of Compact Context-Specific Metabolic Network Models

Nikos Vlassis, Maria Pires Pacheco, Thomas Sauter

摘要:

研究生物细胞或组织的系统方法越来越依赖于使用特定环境的代谢网络模型。从高通量数据重建这样的模型通常涉及在不同条件下的大量测试和广泛的参数调整,这需要快速算法。我们提出了FASTCORE,一种通用算法,用于从全球基因组范围的代谢网络模型(如Recon X)重建特定于上下文的代谢网络模型。FASTCORE将已知在感兴趣的上下文中活跃的反应的核心集合(例如,细胞或组织),并且它搜索包含来自核心集合的所有反应和附加反应的最小集合的全局网络的通量一致子网络。我们的关键观察是,最小的一致性重建可以通过一组稀疏模式的全球网络来定义,FASTCORE通过一系列线性规划迭代计算这样的集合。肝脏数据上的实验表明,几个数量级的加速,并显着更紧凑的重建,在一个主要的竞争对手的方法。由于其简单性和优异的性能,FASTCORE可以形成许多未来代谢网络重建算法的骨干。

英文摘要:

Systemic approaches to the study of a biological cell or tissue rely increasingly on the use of context-specific metabolic network models. The reconstruction of such a model from high-throughput data can routinely involve large numbers of tests under different conditions and extensive parameter tuning, which calls for fast algorithms. We present FASTCORE, a generic algorithm for reconstructing context-specific metabolic network models from global genome-wide metabolic network models such as Recon X. FASTCORE takes as input a core set of reactions that are known to be active in the context of interest (e.g., cell or tissue), and it searches for a flux consistent subnetwork of the global network that contains all reactions from the core set and a minimal set of additional reactions. Our key observation is that a minimal consistent reconstruction can be defined via a set of sparse modes of the global network, and FASTCORE iteratively computes such a set via a series of linear programs. Experiments on liver data demonstrate speedups of several orders of magnitude, and significantly more compact reconstructions, over a chief rival method. Given its simplicity and its excellent performance, FASTCORE can form the backbone of many future metabolic network reconstruction algorithms.

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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