Cited by 257Microbial Metabolic Engineering and BioproductionPlant biochemistry and biosynthesisBiochemical and biochemical processes

High‐level production of amorpha‐4,11‐diene in a two‐phase partitioning bioreactor of metabolically engineered Escherichia coli

Newman, Jack D., Marshall, Jessica, Chang, Michelle, Nowroozi, Farnaz, Paradise, Eric, Pitera, Douglas, Newman, Karyn L., Keasling, Jay D.·2006·Biotechnology and Bioengineering

Abstract

Reconstructing synthetic metabolic pathways in microbes holds great promise for the production of pharmaceuticals in large-scale fermentations. By recreating biosynthetic pathways in bacteria, complex molecules traditionally harvested from scarce natural resources can be produced in microbial cultures. Here we report on a strain of Escherichia coli containing a heterologous, nine-gene biosynthetic pathway for the production of the terpene amorpha-4,11-diene, a precursor to the anti-malarial drug artemisinin. Previous reports have underestimated the productivity of this strain due to the volatility of amorphadiene. Here we show that amorphadiene evaporates from a fermentor with a half-life of about 50 min. Using a condenser, we take advantage of this volatility by trapping the amorphadiene in the off-gas. Amorphadiene was positively identified using nuclear magnetic resonance spectroscopy and determined to be 89% pure as collected. We captured amorphadiene as it was produced in situ by employing a two-phase partitioning bioreactor with a dodecane organic phase. Using a previously characterized caryophyllene standard to calibrate amorphadiene production and capture, the concentration of amorphadiene produced was determined to be 0.5 g/L of culture medium. A standard of amorphadiene collected from the off-gas showed that the caryophyllene standard overestimated amorphadiene production by approximately 30%.

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Crossref · 10.1002/bit.21017

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  • Both Saccharomyces cerevisiae and Escherichia coli have been used as hosts when attempting to establish a viable recombinant microbial pathway for artemisinin biosynthesis.

    “Both Saccharomyces cerevisiae [379,380] and Escherichia coli [381,382,383] have been used as hosts when attempting to establish a viable recombinant microbial pathway for the biosynthesis of artemisinin.”

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Authors
Newman, J. D., Marshall, J., Chang, M., Nowroozi, F., Paradise, E., Pitera, D., Newman, K. L., & Keasling, J. D.
Affiliations
  • University of California, Berkeley (US)
  • Lawrence Berkeley National Laboratory (US)
Corresponding author
Keasling, Jay D.
Venue
Biotechnology and Bioengineering
Publisher
Wiley
Published
2006-07-28
Volume
95
Issue
4
Pages
684-691
ISSN
  • 0006-3592 (ISSN-L)
  • 1097-0290
OpenAlex
W2070190792
Cited by
257
References
16
Citations by year
2026: 3 · 2025: 5 · 2024: 6 · 2023: 3 · 2022: 8 · 2021: 15 · 2020: 11 · 2019: 19 · 2018: 17 · 2017: 6 · 2016: 13 · 2015: 14 · 2014: 22 · 2013: 18 · 2012: 26
FWCI
5.84
Type
journal article
Language
en
Open access
closed
Locations
  • Biotechnology and Bioengineering (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1r41ai061936-01)
  • National Institute of Allergy and Infectious Diseases (5 R41 AI061936-02)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant biochemistry and biosynthesis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Biochemical and biochemical processes
Keywords
terpene biosynthesis, Escherichia coli, metabolic engineering, two-phase partitioning bioreactor, n-dodecane
MeSH terms
Polycyclic Sesquiterpenes, Antimalarials, Escherichia coli, Fermentation, Gases, Half-Life, Sesquiterpenes, Terpenes, Volatilization, Bioreactors, Artemisinins

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