Prospecting hydrogen production of Escherichia coli by metabolic network modeling

被引:8
|
作者
Seppala, Jenni J. [1 ,2 ]
Larjo, Antti [1 ,3 ]
Aho, Tommi [2 ]
Yli-Harja, Olli [1 ]
Karp, Matti T. [2 ]
Santala, Ville [2 ]
机构
[1] Tampere Univ Technol, Dept Signal Proc, FI-33101 Tampere, Finland
[2] Tampere Univ Technol, Dept Chem & Bioengn, FI-33101 Tampere, Finland
[3] Aalto Univ, Dept Informat & Comp Sci, FI-00076 Aalto, Finland
基金
芬兰科学院;
关键词
Hydrogen production; Flux balance analysis; Metabolic engineering; Escherichia coli; Metabolic network modeling; TRANSCRIPTIONAL CONTROL; GENE-EXPRESSION; FLUX ANALYSIS; GLUCOSE; FORMATE; ACID; RECONSTRUCTION; INACTIVATION; LYASE;
D O I
10.1016/j.ijhydene.2013.07.002
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Genome-scale model was applied to analyze the anaerobic metabolism of Escherichia coli. Three different methods were used to find deletions affecting fermentative hydrogen production: flux balance analysis (FBA), algorithm for blocking competing pathways (ABCP), and manual selection. Based on these methods, 81 E. coli mutants possessing one gene deletion were selected and cultivated in batch experiments. Experimental results of H-2 and biomass production were compared against the results of FBA. Several gene deletions enhancing H-2 production were found. Correctness of gene essentiality predictions of FBA for the selected genes was 78% and 77% in glucose and galactose media, respectively. 33% of the mutations that were predicted by FBA to increase H-2 production had a positive effect in experiments. Batch cultivation is a simple and straightforward experimental way to screen improvements in H-2 production. However, the ability of FBA to predict the H-2 production rate cannot be evaluated by batch experiments. Metabolic network models provide a method for gaining broader understanding of the complicated metabolic system of a cell and can aid in prospecting suitable gene deletions for enhancing H-2 production. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:11780 / 11789
页数:10
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