详细信息
荚膜红细菌十聚异戊二烯焦磷酸合成酶异源表达及纯化的研究
Heterologous Expression and Purification of Decaprenyl Diphosphate Synthase from Rhodobacter capsulatus B10
文献类型:期刊文献
中文题名:荚膜红细菌十聚异戊二烯焦磷酸合成酶异源表达及纯化的研究
英文题名:Heterologous Expression and Purification of Decaprenyl Diphosphate Synthase from Rhodobacter capsulatus B10
作者:刘欣毅[1];张惠展[1];袁勤生[2]
机构:[1]华东理工大学生物反应器工程国家重点实验室;[2]华东理工大学生物工程学院,上海200237
年份:2007
卷号:42
期号:1
起止页码:13
中文期刊名:中国药学杂志
外文期刊名:Chinese Pharmaceutical Journal
收录:CSTPCD;;Scopus;北大核心:【北大核心2004】;CSCD:【CSCD2011_2012】;PubMed;
语种:中文
中文关键词:辅酶Q10;十聚异戊二烯焦磷酸合成酶;融合表达;镍柱纯化
外文关键词:coenzyme Q10 ;decaprenyl diphosphate synthase ;fusion expression; Ni-sepharose purification
摘要:目的构建生产辅酶Q10的大肠杆菌基因工程菌并研究相关酶的表达情况。方法将荚膜红细菌(Rhodobacter capsula-tusB10)中十聚异戊二烯焦磷酸合成酶编码基因ddsA分别克隆在Lac,T7和Trc启动子下游,使其在Escherichia coliJM83中表达。同时利用H is-tag的表达系统,对该酶的融合表达和镍柱纯化条件进行了研究。结果产物分析发现该基因在E.coli中表达出有活性的十聚异戊二烯焦磷酸合成酶,并使宿主产生辅酶Q10。同时,28℃培养过夜,该酶以可溶形式存在于上清液中。在150 mmol.L-1咪唑的洗涤条件下,从镍柱上解离,并可以达到电泳纯。结论大肠杆菌可以表达Rhodobacter capsula-tusB10的十聚异戊二烯焦磷酸合成酶,并合成辅酶Q10。
OBJECTIVE To construct Escherichia coli producing coenzyme Q10 and investigate the decaprenyl diphosphate synthase expression. METHODS The ddsA gene encoding decaprenyl diphosphate synthase from Rhodobacter capsu/atus B10 was cloned downstream different promoters ( Lac, T7 and Trc) and heterologous expressed in E. coli JM83. The purification of ddsA fusion protein was investigated with His-tag system. RESULTS E. coli was observed to synthesize coenzyme Q10 in vivo. The fusion protein was expressed in supematant after being cultivating overnight at 28 ℃, and was separated by 150 mmol · L^-1 imidazole on Ni-sepharose column CONCLUSION E. coli can produce coenzyme Q10 by heterologous expressing the decaprenyl diphosphate synthase from Rhodobacter capsulatas B10.
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