Biosynthesis of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) from glucose with elevated 3-hydroxyvalerate fraction via combined citramalate and threonine pathway in Escherichia coli

Biosynthesis of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) from glucose with elevated 3-hydroxyvalerate fraction via combined citramalate and threonine pathway in Escherichia coli
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在大肠杆菌中通过柠檬酸和苏氨酸联合途径从具有升高的 3-羟基戊酸分数的葡萄糖生物合成聚(3-羟基丁酸-co-3-羟基戊酸)

DOI:
10.1007/s00253-013-5494-5
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发表时间:
2014-01
影响因子:
5
通讯作者:
Qingsheng Qi
Qingsheng Qi
中科院分区:
工程技术2区
文献类型:
--
作者:
Qian Wang;Xiaolong Liu;Qingsheng Qi

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在大肠杆菌中从无关碳源合成聚羟基烷酸酯共聚物是目前研究的热点。我们之前在大肠杆菌中开发了一种从不相关碳源通过苏氨酸代谢途径合成聚(羟基丁酸酯-co-羟基戊酸酯)(PHBV)的生物合成途径。大肠杆菌(Chen等人,Appl Environ Microbiol 77:4886-4893,2011)。在我们的研究中,柠檬酸途径被引入重组E。通过克隆问号钩端螺旋体的cimA基因,构建了cimA基因在大肠杆菌中的表达载体。通过阻断丙酮酸和丙酰辅酶A催化剂,并替换β-酮硫解酶基因,合成了含11.5mol%3HV组分的PHBV。此外,柠檬酸途径与苏氨酸生物合成途径的组合将PHBV共聚物中的3 HV部分提高到重组E.杆菌
The biosynthesis of polyhydroxyalkanoate copolymers in Escherichia coli from unrelated carbon sources becomes attractive nowadays. We previously developed a poly(hydroxybutyrate-co-hydroxyvalerte) (PHBV) biosynthetic pathway from an unrelated carbon source via threonine metabolic route in E. coli (Chen et al., Appl Environ Microbiol 77:4886-4893, 2011). In our study, a citramalate pathway was introduced in recombinant E. coli by cloning a cimA gene from Leptospira interrogans. By blocking the pyruvate and the propionyl-CoA catabolism and replacing the β-ketothiolase gene, the PHBV with 11.5 mol% 3HV fraction was synthesized. Further, the combination of citramalate pathway with the threonine biosynthesis pathway improved the 3HV fraction in PHBV copolymer to 25.4 mol% in recombinant E. coli.
DOI: --
发表时间: 1998
影响因子: 3.2
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