Optimization of Fermentation and Induction Conditions of Recombinant E.coli BL21(DE3)/pET30a(+)hrpNEcc
- VernacularTitle:基因重组大肠杆菌表达HrpNEcc蛋白的发酵条件及诱导条件优化
- Author:
Shu ZHANG
;
Min WANG
;
Meilin HAN
;
Rongcai MA
;
Qiang CHEN
;
Junlian GAO
- Publication Type:Journal Article
- Keywords:
HrpNEcc protein Recombinant E.coli Optimization of fermentation and induction conditions
- From:
China Biotechnology
2006;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
In order to obtain high yield of the HrpNEcc protein with a lower total cost,fermentation and lactose induction conditions for recombinant E.coli BL21(DE3)/pET30a(+)hrpN Ecc were optimized in flasks and the recombinant E.coli was fermentated in 7L fermenter.The optimized incoulum concentration was 5% and the optimized nutrient medium was TB medium.The HrpNEcc protein yield reached 417.60mg/L by adding 3g/L exogenous inducer lactose in the growth prophase of log-phase for the recombinant E.coli.The HrpNEcc protein yield was higher 36.73% than that of the case of no any inducer,and was higher 16.85% than that of the case of adding IPTG.The wet weight of cell pellet of the recombinant E.coli reached 57.24g/L after fermentation in 7L fermenter,the HrpNEcc protein reached 3.29g/L,about 50.2% of total cellular protein.
