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Position: Home > Articles > Study on efficient expression of organic phosphorus degradation enzyme gene(opdA) in Escherichia coli Acta Agriculturae Shanghai 2013,29 (5) 1-5

有机磷降解酶基因(opdA)在大肠杆菌中高效表达的研究

作  者:
陈大超;王金斌;蒋玮;吴潇;何建华;刘华;李鹏;白蓝;武国干
单  位:
上海市农业科学院生物技术研究所
关键词:
有机磷降解酶;基因工程;蛋白表达;蛋白纯化;酶活性
摘  要:
合成opdA基因,构建表达载体pET-28b-opdA,将其转化至大肠杆菌BL21(DE3)中得到重组工程菌株,并对重组菌株的诱导表达条件进行优化。结果表明:诱导前菌液OD_(600)的吸光值为0.5,IPTG诱导浓度为0.1mmol/L,诱导温度为37℃,诱导时间为5 h。opdA酶对甲基对硫磷的K_m为42.6μmol/L,其ν_max为32.669μmol/(L·min),比酶活为24.48U/mg。
译  名:
Study on efficient expression of organic phosphorus degradation enzyme gene(opdA) in Escherichia coli
作  者:
CHEN Da-chao;WANG Jin-bin;JIANG Wei;WU Xiao;HE Jian-hua;LIU Hua;LI Peng;BAI Lan;WU Guo-gan;Lü Bei-bei;TANG Xue-ming;Biotechnology Research Institute,Shanghai Academy of Agricultural Sciences;College of Fisheries and Life Science,Shanghai Ocean University;Supervision,Inspection and Test Center for Environmental Safety of Genetically modified Crops,Ministry of Agriculture;Shanghai Key Laboratory of Agricultural Genetics and Breeding;
关键词:
Organophosphate-degrading enzyme;;Gene engineering;;Protein expression;;Protein purification;;Enzyme activity
摘  要:
The synthetic gene opdA was inserted into vector pET-28b to construct a recombinant plasmid pET-28b-opdA,which was subsequently transformed into BL2KDE3),producing a recombinant engineering strain BL21(DE3)/pET-28b-opdA.And the recombinant strain's induction and expression conditions were optimized.The results showed that the OD_(600) before induction was 0.5,and the induction was made at 0.1 mmol/L IPTG and 37 ℃ for 5 h.The K_m of opdA enzyme for parathion-methyl was 42.6 μmol/L,the maximum reaction velocity(V_(max))was 32.669 μmol/(L·min),and the specific activity of opdA enzyme was 24.48 U/mg.

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