JIN Bao-long, CUI Guang-hong, DANG Bo-yue, et al. Heterologous Expression and Purification of Recombinant CPS4 from [J]. Chinese journal of experimental traditional medical formulae, 2014, 20(10): 94-98.
JIN Bao-long, CUI Guang-hong, DANG Bo-yue, et al. Heterologous Expression and Purification of Recombinant CPS4 from [J]. Chinese journal of experimental traditional medical formulae, 2014, 20(10): 94-98. DOI: 10.13422/j.cnki.syfjx.2014100094.
Objective: To find the optimal heterologous expression conditions and purification system for the new gene CPS4 from Salvia miltiorrhiza. Method: Compare two different prokaryotic expression strains and optimizing the induction conditions including A600 values of Escherichia coli
isopropyl-beta-D-galactose and glycosides(IPTG) concentration and induction time with orthogonal experiment. The recombinant protein was purified by HisTrap HP. Result: E. coli Tuner (DE3) induced more soluble recombinant protein than BL21 (DE3). The optimal expression conditions are A600 is 0.7
IPTG concentration is 0.2 mmol·L-1 and induction time for 10 h. The recombinant protein was purified by gradient elution with HisTrap HP. Conclusion: This optimal system can obtain enough protein for further study and provide a reference for the prokaryotic expression of the other diterpene synthase.