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• W2117592261 abstract "A model is presented to describe the observed behavior of microorganisms that aim at metabolic homeostasis while growing and adapting to their environment in an optimal way. The cellular metabolism is seen as a network with a multiple controller system with both feedback and feedforward control, i.e., a model based on a dynamic optimal metabolic control. The dynamic network consists of aggregated pathways, each having a control setpoint for the metabolic states at a given growth rate. This set of strategies of the cell forms a true cybernetic model with a minimal number of assumptions. The cellular strategies and constraints were derived from metabolic flux analysis using an identified, biochemically relevant, stoichiometry matrix derived from experimental data on the cellular composition of continuous cultures of Saccharomyces cerevisiae. Based on these data a cybernetic model was developed to study its dynamic behavior. The growth rate of the cell is determined by the structural compounds and fluxes of compounds related to central metabolism. In contrast to many other cybernetic models, the minimal model does not consist of any assumed internal kinetic parameters or interactions. This necessitates the use of a stepwise integration with an optimization of the fluxes at every time interval. Some examples of the behavior of this model are given with respect to steady states and pulse responses. This model is very suitable for describing semiquantitatively dynamics of global cellular metabolism and may form a useful framework for including structured and more detailed kinetic models." @default.
• W2117592261 created "2016-06-24" @default.
• W2117592261 creator A5038218119 @default.
• W2117592261 creator A5080532983 @default.
• W2117592261 date "2000-01-01" @default.
• W2117592261 modified "2023-09-25" @default.
• W2117592261 title "Metabolic Modeling of Saccharomyces cerevisiae Using the Optimal Control of Homeostasis: A Cybernetic Model Definition" @default.
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• W2117592261 doi "https://doi.org/10.1006/mben.1999.0134" @default.
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