Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (12): 2185.doi: 10.7503/cjcu20170314

• Organic Chemistry • Previous Articles     Next Articles

Transformation of Total Notoginsenosides by Recombinant Endocellulase Fpendo5A

LI Nan, ZHAO Huanxi, LI Jing, WANG Nan, YU Bohao, YUE Hao*(), YU Shanshan*()   

  1. Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun 130000, China
  • Received:2017-05-18 Online:2017-12-10 Published:2017-10-10
  • Contact: YUE Hao,YU Shanshan E-mail:yuehao001@aliyun.com;yushanshan001@aliyun.com
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.31400682)

Abstract:

A novel endocellulase(Fpendo5A) was cloned from Fervidobacterium pennivorans DSM9078. After being overexpressed and purified from Escherichia coli, the enzymatic properties of Fpendo5A were investigated. Also, rapid resolution liquid chromatography coupled with quadruple-time-of-flight mass spectrometry(RRLC/Q-TOF-MS) was performed to investigate the biotransformation process of the total notoginsenosides by Fpendo5A. Fpendo5A exhibited an optimal activity at 80 ℃ and pH=5.5 and showed the highest activity for carboxymethyl cellulose(CMC), which indicated that Fpendo5A was a thermophilic and acidophi-lic endocellulase. Also, Fpendo5A showed high biotransformation ability for ginsenoside Ra1, Rb1, Rc, Rd and Rg3, which are the main components in the total notoginsenosides. Ra1, Rb1, Rc, Rd and Rg3 were converted to Rb2, Gyp ⅩⅦ, CMC1, F2 and Rh2, respectively by Fpendo5A.

Key words: Notoginsenoside, Endocellulase, Biotransformation, High performance liquid chromatography-mass spectrometry(HPLC-MS)

CLC Number: 

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