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Engineering the MEP Pathway Enhanced Ajmalicine Biosynthesis

Engineering the MEP Pathway Enhanced Ajmalicine Biosynthesis

Kai Chang, Fei Qiu, Min Chen, Lingjiang Zeng, Xiaoqiang Liu, Chunxian Yang, Xiaozhong Lan, Qiang Wang, Zhihua Liao

Biotechnol Appl Biochem. May-Jun 2014;61(3):249-55.

PMID: 24237015

Abstract:

The 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway genes encoding DXR and MECS from Taxus species and STR from Catharanthus roseus were used to genetically modify the ajmalicine biosynthetic pathway in hairy root cultures of C. roseus. As expected, the STR-overexpressed root cultures showed twofold higher accumulation of ajmalicine than the control. It was important to discover that overexpression of the single DXR or MECS gene from the MEP pathway also remarkably enhanced ajmalicine biosynthesis in transgenic hairy root cultures, and this suggested that engineering the MEP pathway by overexpression of DXR or MECS promoted the metabolic flux into ajmalicine biosynthesis. The transgenic hairy root cultures with co-overexpression of DXR and STR or MECS and STR had higher levels of ajmalicine than those with overexpression of a single gene alone such as DXR, MECS, and STR. It could be concluded that transgenic hairy root cultures harboring both DXR/MECS and STR possessed an increased flux in the terpenoid indole alkaloid biosynthetic pathway that enhanced ajmalicine yield, which was more efficient than cultures harboring only one of the three genes.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP483045-A	Ajmalicine		483-04-5	Price

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