The present study was designed to explore the substrate scope and biocatalytic capability of Gliocladium deliquescens NRRL 1086 on phenolic natural products. Emodin was subjected to the fermentation culture of Gliocla...The present study was designed to explore the substrate scope and biocatalytic capability of Gliocladium deliquescens NRRL 1086 on phenolic natural products. Emodin was subjected to the fermentation culture of Gliocladium deliquescens NRRL 1086 according to the standard two-stage protocol. The biotransformation process was monitored by HPLC-DAD-MS, the main product was isolated by column chromatography, and the structure was elucidated on the basis of NMR spectroscopy. Emodin could be fully metabolized by Gliocladium deliquescens NRRL 1086, resulting in high yield of emodin 6-O-β-D-glucopyranoside and small amount of sulfated product. In conclusion, our results may provide a convenient method to prepare emodin 6-O-β-D-glucopyranoside and the microbe catalyzed glucosylation/sulfation will give an inspiration to pharmacokinetic model studies in vitro.展开更多
The present study was designed to construct the structurally diverse library of tetrahydroprotoberberines(THPBs) by combining the methods of chemical nonselective demethylation and microbial glycosylation. HPLC-MS/MS ...The present study was designed to construct the structurally diverse library of tetrahydroprotoberberines(THPBs) by combining the methods of chemical nonselective demethylation and microbial glycosylation. HPLC-MS/MS analyses tentativelyidentified 12 de-methylated and 9 glycosylated derivates of THPBs and 5 rarely oxidized glycosides of THPBs in the library. Through this effort, we achieved not only a variety of the THPBs and their glycosides but also tested the catalytic characteristics and capabilities of G. deliquescens NRRL 1086.展开更多
基金supported by the National Nature Science Foundation of China(No.21302052)"Program for New Century Excellent Talents in University"awarded to Prof.Jian Zhang"111 Project"from the Ministry of Education of China+1 种基金Fundamental Research Funds for the Central Universities(No.JKZ2011017)Scientific and Innovation Research of College Graduates in Jangsu Province(No.CXLX11_0788)
文摘The present study was designed to explore the substrate scope and biocatalytic capability of Gliocladium deliquescens NRRL 1086 on phenolic natural products. Emodin was subjected to the fermentation culture of Gliocladium deliquescens NRRL 1086 according to the standard two-stage protocol. The biotransformation process was monitored by HPLC-DAD-MS, the main product was isolated by column chromatography, and the structure was elucidated on the basis of NMR spectroscopy. Emodin could be fully metabolized by Gliocladium deliquescens NRRL 1086, resulting in high yield of emodin 6-O-β-D-glucopyranoside and small amount of sulfated product. In conclusion, our results may provide a convenient method to prepare emodin 6-O-β-D-glucopyranoside and the microbe catalyzed glucosylation/sulfation will give an inspiration to pharmacokinetic model studies in vitro.
基金funded by the National Nature Science Foundation of China(No.21302052)the Program for New Century Excellent Talents in University+1 种基金the‘111 Project’from the Ministry of Education of Chinathe Fundamental Research Funds for the Central Universities(No.JKZ2011017)
文摘The present study was designed to construct the structurally diverse library of tetrahydroprotoberberines(THPBs) by combining the methods of chemical nonselective demethylation and microbial glycosylation. HPLC-MS/MS analyses tentativelyidentified 12 de-methylated and 9 glycosylated derivates of THPBs and 5 rarely oxidized glycosides of THPBs in the library. Through this effort, we achieved not only a variety of the THPBs and their glycosides but also tested the catalytic characteristics and capabilities of G. deliquescens NRRL 1086.
