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07:59
A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products
Published on: October 4, 2019
Isoprenoid pathway optimization for Taxol precursor overproduction in Escherichia coli
Parayil Kumaran Ajikumar1, Wen-Hai Xiao, Keith E J Tyo
1Department of Chemical Engineering, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
Science (New York, N.Y.)
|October 9, 2010
Summary
Scientists engineered E. coli to produce taxadiene, a key Taxol precursor, at high levels. This metabolic engineering breakthrough advances the cost-efficient production of Taxol and related anticancer compounds.
Area of Science:
- Biotechnology
- Metabolic Engineering
- Natural Product Synthesis
Background:
- Taxol (paclitaxel) is a crucial anticancer drug derived from the Pacific yew tree.
- Current production methods for Taxol and its analogs are limited and costly.
Purpose of the Study:
- To develop a cost-efficient method for producing taxadiene, the initial intermediate in Taxol biosynthesis.
- To engineer Escherichia coli for high-titer taxadiene production.
Main Methods:
- Implemented a multivariate-modular metabolic engineering strategy in E. coli.
- Partitioned the taxadiene pathway into upstream (native MEP) and downstream (heterologous) modules.
- Optimized module balancing to maximize taxadiene yield and minimize indole accumulation.
Main Results:
- Achieved taxadiene titers of approximately 1 gram per liter, a ~15,000-fold increase.
- Successfully engineered the subsequent P450-mediated oxidation of taxadiene to taxadien-5α-ol.
- Demonstrated the potential of the MEP pathway for engineered terpenoid production.
Conclusions:
- The multivariate-modular approach effectively enhances taxadiene production in engineered E. coli.
- This strategy significantly advances the potential for large-scale, cost-effective Taxol precursor synthesis.
- The study highlights the broader applicability of MEP pathway engineering for natural product biosynthesis.
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