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Expression, subcellular localization and characterization of dammarenediol-Ⅱ synthase of Panax ginseng in Saccharomyces cerevisiae / 药学学报
Acta Pharmaceutica Sinica ; (12): 998-2016.
Article in Chinese | WPRIM | ID: wpr-779269
ABSTRACT
To study the expression and subcellular localization of recombinant dammarenediol-Ⅱ synthase (DS) in Saccharomyces cerevisiae, the dammarenediol-Ⅱ synthase gene ds was cloned from Panax ginseng, and the gene ds was fused with the gene of green fluorescent protein to obtain the fusion gene ds-gfp. The recombinant expression plasmids pESC-HIS-DS and pESC-HIS-DS-GFP were constructed and transformed into S. cerevisiae INVSc1 to obtain recombinant strains INVSc1-DS and INVSc1-DS-GFP. Microsomes of recombinant strains were prepared by differential centrifugation and observed by fluorescence microscope. The green fluorescence was only detected in INVSc1-DS-GFP microsomes, which indicated that DS was a membrane protein. It was also proved that dammarenediol-Ⅱ was produced from the cyclization of 2, 3-oxidosqualene catalyzed by DS through in vitro enzymatic reaction. In addition, our results revealed that the fusion expression of ds with gfp significantly improved the production of dammarenediol-Ⅱ from 7.53 mg·g-1 to 12.24 mg·g-1. This study provides a new strategy in the optimization of the pathway of ginsenosides biosynthesis in S. cerevisiae.

Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Acta Pharmaceutica Sinica Year: 2016 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Acta Pharmaceutica Sinica Year: 2016 Type: Article