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A Modular Modulation Method for Achieving Increases in Metabolite Production

机译:实现代谢物产量增加的模块化调制方法

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Increasing the production of overproducing strains represents a great challenge. Here, we develop a modular modulation method to determine the key steps for genetic manipulation to increase metabolite production. The method consists of three steps: (i) modularization of the metabolic network into two modules connected by linking metabolites, (ii) change in the activity of the modules using auxiliary rates producing or consuming the linking metabolites in appropriate proportions and (iii) determination of the key modules and steps to increase production. The mathematical formulation of the method in matrix form shows that it may be applied to metabolic networks of any structure and size, with reactions showing any kind of rate laws. The results are valid for any type of conservation relationships in the metabolite concentrations or interactions between modules. The activity of the module may, in principle, be changed by any large factor. The method may be applied recursively or combined with other methods devised to perform fine searches in smaller regions. In practice, it is implemented by integrating to the producer strain heterologous reactions or synthetic pathways producing or consuming the linking metabolites. The new procedure may contribute to develop metabolic engineering into a more systematic practice. (C) 2015 American Institute of Chemical Engineers
机译:增加过量生产菌株的产量是一个巨大的挑战。在这里,我们开发了一种模块化的调制方法,以确定遗传操作以增加代谢物生产的关键步骤。该方法包括三个步骤:(i)将代谢网络模块化为通过链接代谢物连接的两个模块,(ii)使用辅助速率以适当比例产生或消耗链接代谢物的模块的活性变化和(iii)确定关键模块和增加产量的步骤。该方法以矩阵形式的数学表述表明,它可以应用于任何结构和大小的代谢网络,并且反应显示出任何种类的速率定律。该结果对于代谢物浓度或模块之间的相互作用中的任何类型的保守关系均有效。原则上,模块的活动可以有很大的改变。该方法可以递归地应用,或者与设计用于在较小区域中执行精细搜索的其他方法结合使用。在实践中,通过将产生或消耗连接代谢物的异源反应或合成途径整合到生产者菌株中来实施。新程序可能有助于将代谢工程发展为更系统的实践。 (C)2015美国化学工程师学会

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