Efficient Biosynthesis of Raspberry Ketone by Engineered Escherichia coli Coexpressing Zingerone Synthase and Glucose Dehydrogenase
Raspberry ketone (RK), the main aroma compound of raspberry fruit, has applications in cosmetics, food industry, and pharmaceutics. In this study, we biosynthesized RK via the catalytic reduction of 4-hydroxybenzylidenacetone using a whole-cell biocatalyst. Reductase RiRZS1 from Rubus idaeus and glucose dehydrogenase SyGDH from Thermoplasma acidophilum were expressed in Escherichia coli to regenerate NADPH for the whole-cell catalytic reaction. Following the optimization of balancing the coexpression of two enzymes in pRSFDuet-1, we obtained 9.89 g/L RK with a conversion rate of 98% and a space-time yield of 4.94 g/(L·h). The optimum conditions are 40 °C, pH 5.5, and a molar ratio of substrate to auxiliary substrate of 1:2.5. Our study findings provide a promising method of biosynthesizing RK.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:69 |
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| Enthalten in: |
Journal of agricultural and food chemistry - 69(2021), 8 vom: 03. März, Seite 2549-2556 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Yang, Bo [VerfasserIn] |
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| Links: |
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| Themen: |
4MMW850892 |
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| Anmerkungen: |
Date Completed 14.05.2021 Date Revised 14.05.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1021/acs.jafc.0c07697 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM321520785 |
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| 520 | |a Raspberry ketone (RK), the main aroma compound of raspberry fruit, has applications in cosmetics, food industry, and pharmaceutics. In this study, we biosynthesized RK via the catalytic reduction of 4-hydroxybenzylidenacetone using a whole-cell biocatalyst. Reductase RiRZS1 from Rubus idaeus and glucose dehydrogenase SyGDH from Thermoplasma acidophilum were expressed in Escherichia coli to regenerate NADPH for the whole-cell catalytic reaction. Following the optimization of balancing the coexpression of two enzymes in pRSFDuet-1, we obtained 9.89 g/L RK with a conversion rate of 98% and a space-time yield of 4.94 g/(L·h). The optimum conditions are 40 °C, pH 5.5, and a molar ratio of substrate to auxiliary substrate of 1:2.5. Our study findings provide a promising method of biosynthesizing RK | ||
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