详细信息
基于重组大肠杆菌无细胞体系生产吡咯喹啉醌
Exploiting Cell-free System of Recombinant E.coli to Synthesize Pyrroloquinoline Quinone
文献类型:期刊文献
中文题名:基于重组大肠杆菌无细胞体系生产吡咯喹啉醌
英文题名:Exploiting Cell-free System of Recombinant E.coli to Synthesize Pyrroloquinoline Quinone
作者:孙继国[1];韩增叶[1];葛喜珍[2];田平芳[1]
第一作者:孙继国
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:2014
期号:4
起止页码:164-168
中文期刊名:生物技术通报
外文期刊名:Biotechnology Bulletin
收录:CSTPCD;;北大核心:【北大核心2011】;CSCD:【CSCD_E2013_2014】;
基金:国家自然科学基金项目(21076013);"973"项目(2012CB725200)
语种:中文
中文关键词:大肠杆菌;无细胞体系;吡咯喹啉醌;限速反应
外文关键词:E. coli;Cell-free system;Pyrroloquinoline quinine;Velocity-limiting reaction
摘要:采用无细胞体系生产吡咯喹啉醌(pyrroloquinoline quinone,PQQ)。首先将肺炎克雷伯氏菌PQQ基因簇pqqABCDEF置于半乳糖苷酶启动子之下,构建表达载体,经转化筛选获得重组大肠杆菌。制备重组菌的细胞匀浆,体外反应后测定PQQ产量。结果显示,与活体重组菌相比,无细胞体系的PQQ产量提高约30%,表明胞内存在PQQ合成的限速反应,而无细胞体系可解除此限速反应。
In this study, cell-free system was developed to overproduce pyrroloquinoline quinone(PQQ). The PQQ gene cluster from Klebsiella pneumoniae was subcloned into vector harboring lac promoter and a recombinant Escherichia coli was acquired. Subsequently cell homogenate was prepared which showed^30%increase of PQQ yield compared with in vivo biosynthesis. Not only revealing the presence of intracellular velocity-limiting reaction(s)that retards PQQ biosynthesis, this study also suggests that cell-free system can address this issue. Hence, this study provides basis for further enhancement of PQQ production.
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