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重组肺炎克雷伯氏菌转化甘油为聚3-羟基丙酸    

Metabolic Engineering of Klebsiella pneumoniae for the Production of Poly (3-Hydroxypropionate) from Glycerol

文献类型:期刊文献

中文题名:重组肺炎克雷伯氏菌转化甘油为聚3-羟基丙酸

英文题名:Metabolic Engineering of Klebsiella pneumoniae for the Production of Poly (3-Hydroxypropionate) from Glycerol

作者:窦一涵[1];李映[2];赵鹏[1];范如婷[1];田平芳[1]

第一作者:窦一涵

机构:[1]北京化工大学生命科学与技术学院;[2]北京联合大学生物化学工程学院

第一机构:北京化工大学生命科学与技术学院,北京100029

年份:2017

卷号:37

期号:6

起止页码:86-92

中文期刊名:中国生物工程杂志

外文期刊名:China Biotechnology

收录:CSTPCD;;北大核心:【北大核心2014】;CSCD:【CSCD2017_2018】;

基金:国家自然科学基金(21276014;21476011);国家"863"计划(2015AA021003)资助项目

语种:中文

中文关键词:肺炎克雷伯氏菌;聚3-羟基丙酸;甘油;丙醛脱氢酶;聚羟基脂肪酸酯合成酶

外文关键词:Klebsiella pneumoniae Poly ( 3-hydroxypropionate ) Glycerol Propionaldehyde dehydrogenase Polyhydroxyalkanoate synthase

摘要:聚3-羟基丙酸[Poly(3-hydroxypropionate),P3HP]是一种生物可降解及生物相容的新型聚羟基脂肪酸酯。目前已鉴定的生物均不能天然合成P3HP。采用PCR克隆鼠伤寒沙门氏菌的丙醛脱氢酶(Pdu P)基因及罗尔斯通氏菌的聚羟基脂肪酸酯合成酶(Pha C)基因,构建共表达载体,转化肺炎克雷伯氏菌后获得两株重组菌。以甘油为唯一碳源进行摇瓶发酵,pdu P和pha C共用tac启动子的工程菌K.p(p ET-tac-pdu P-pha C)产生0.054 g/L的P3HP,而pdu P和pha C各自独用tac启动子的工程菌K.p(p ET-tac-pdu P-tac-pha C)产生0.091 g/L的P3HP。
Poly (3-hydroxypropionate) (P3HP) represents a novel biodegradable and biocompatible polyhydroxyalkanoate. None of currently identified organisms can naturally synthesize P3HP. Two recombinant Klebsiella pneumoniae strains for the production of P3HP were constructed. The propionaldehyde dehydrogenase gene (pduP) from Salmonella enterica serovar typhimurium LT2 and the polyhydroxyalkanoate synthase gene (phaC) from Ralstonia eutropha H16 were cloned by PCR and cloned into vectors. Transformation of vectors into competent K. pneumoniae cells led to two recombinant strains: K. p (pET-tac-pduP-phaC) , whereby pduP and phaC shared tac promoter, and K. p (pET-tac-pduP-tae-phaC) , whereby pduP and phaC were independently expressed under tac promoter. Using glycerol as the sole carbon source for shake flask fermentation, the strain K. p(pET-tac-pduP-phaC) produced 0. 054 g/L of P3HP, by contrast, the strain K. p (pET-tae-pduP-tac-phaC) produced 0.091 g/L of P3HP.

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