Enhancing production of bio-isoprene using hybrid MVA pathway and isoprene synthase in E. coli.

Enhancing production of bio-isoprene using hybrid MVA pathway and isoprene synthase in E. coli.
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DOI:
10.1371/journal.pone.0033509
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Liu W
Liu W
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Yang J;Xian M;Su S;Zhao G;Nie Q;Jiang X;Zheng Y;Liu W

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The depleting petroleum reserve, increasingly severe energy crisis, and global climate change are reigniting enthusiasm for seeking sustainable technologies to replace petroleum as a source of fuel and chemicals. In this paper, the efficiency of the MVA pathway on isoprene production has been improved as follows: firstly, in order to increase MVA production, the source of the “upper pathway” which contains HMG-CoA synthase, acetyl-CoA acetyltransferase and HMG-CoA reductase to covert acetyl-CoA into MVA has been changed from Saccharomyces cerevisiae to Enterococcus faecalis; secondly, to further enhance the production of MVA and isoprene, a alanine 110 of the mvaS gene has been mutated to a glycine. The final genetic strain YJM25 containing the optimized MVA pathway and isoprene synthase from Populus alba can accumulate isoprene up to 6.3 g/L after 40 h of fed-batch cultivation.
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