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Establishing an Artificial Pathway for Efficient Biosynthesis of Hydroxytyrosol
Xianglai Li1, Zhenya Chen1, Yifei Wu1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
ACS Synthetic Biology
|December 29, 2017
Summary
Researchers developed a novel artificial pathway for hydroxytyrosol (HT) biosynthesis, achieving significant yields from simple carbon sources. This sustainable method offers a promising alternative for industrial HT production.
Area of Science:
- Biotechnology
- Synthetic Biology
- Metabolic Engineering
Background:
- Hydroxytyrosol (HT) is a potent antioxidant with significant pharmaceutical applications.
- Existing methods for HT production are limited, necessitating novel biosynthetic strategies.
Purpose of the Study:
- To engineer an artificial biosynthetic pathway for hydroxytyrosol (HT) production in a microbial host.
- To optimize enzyme selection and culture conditions for enhanced HT titers.
Main Methods:
- Constructed a tyrosol biosynthetic pathway using selected enzymes, including Aro10 and ADH6.
- Engineered the pathway for HT production by overexpressing the hydroxylase HpaBC.
- Optimized culture conditions by adjusting media components (NH4Cl removal, ascorbic acid addition) and employing in situ product removal with 1-dodecanol.
Main Results:
- Achieved tyrosol titers of 1469 ± 56 mg/L from tyrosine and 620 ± 23 mg/L from simple carbon sources.
- Enhanced HT production to 1243 ± 165 mg/L via feeding experiments.
- Obtained 647 ± 35 mg/L of HT from simple carbon sources using the complete engineered pathway.
Conclusions:
- Successfully established a sustainable and scalable artificial pathway for hydroxytyrosol biosynthesis.
- The engineered pathway demonstrates significant potential for industrial production of HT.
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