Ensemble modeling for aromatic production in Escherichia coli.
Ensemble modeling for aromatic production in Escherichia coli.
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DOI:
10.1371/journal.pone.0006903
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发表时间:
2009-09-04
期刊:
影响因子:
3.7
通讯作者:
Liao JC
中科院分区:
文献类型:
--
作者:
Rizk ML;Liao JC
Ensemble Modeling (EM) is a recently developed method for metabolic modeling, particularly for utilizing the effect of enzyme tuning data on the production of a specific compound to refine the model. This approach is used here to investigate the production of aromatic products in Escherichia coli. Instead of using dynamic metabolite data to fit a model, the EM approach uses phenotypic data (effects of enzyme overexpression or knockouts on the steady state production rate) to screen possible models. These data are routinely generated during strain design. An ensemble of models is constructed that all reach the same steady state and are based on the same mechanistic framework at the elementary reaction level. The behavior of the models spans the kinetics allowable by thermodynamics. Then by using existing data from the literature for the overexpression of genes coding for transketolase (Tkt), transaldolase (Tal), and phosphoenolpyruvate synthase (Pps) to screen the ensemble, we arrive at a set of models that properly describes the known enzyme overexpression phenotypes. This subset of models becomes more predictive as additional data are used to refine the models. The final ensemble of models demonstrates the characteristic of the cell that Tkt is the first rate controlling step, and correctly predicts that only after Tkt is overexpressed does an increase in Pps increase the production rate of aromatics. This work demonstrates that EM is able to capture the result of enzyme overexpression on aromatic producing bacteria by successfully utilizing routinely generated enzyme tuning data to guide model learning.
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影响因子:
3.7
作者:
MASSEY, FJ
通讯作者:
MASSEY, FJ
DOI:
10.1016/j.jtice.2009.05.003
发表时间:
2009-11-01
影响因子:
5.7
作者:
Rizk, Matthew L.;Liao, James C.
通讯作者:
Liao, James C.
影响因子:
17.3
作者:
Berry, A
通讯作者:
Berry, A
DOI:
10.1007/bf01570148
发表时间:
1996-07-01
期刊:
JOURNAL OF INDUSTRIAL MICROBIOLOGY
影响因子:
--
作者:
Gosset, G;YongXiao, J;Berry, A
通讯作者:
Berry, A
影响因子:
8.4
作者:
Sriram, G;Shanks, JV
通讯作者:
Shanks, JV