期刊
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
卷 9, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fbioe.2021.631863
关键词
(+)-borneol; (+)-bornyl diphosphate synthase; Cinnamomum burmanni; metabolic engineering; Saccharomyces cerevisiae
资金
- National Key R&D Program of China [2020YFA0908000, 2018YFA0900600]
- Major Program of National Natural Science Foundation of China [81891010, 81891013]
- National Natural Science Foundation of China [81822046]
- Key project at central government level: The ability to establish sustainable use of valuable Chinese medicine resources [2060302]
This study identified the highly specific (+)-bornyl diphosphate synthase from Cinnamomum burmanni and successfully reconstructed the (+)-borneol biosynthetic pathway in Saccharomyces cerevisiae, significantly increasing the yield. This lays the foundation for further synthesis and production of this valuable monoterpene compound.
(+)-Borneol is a desirable monoterpenoid with effective anti-inflammatory and analgesic effects that is known as soft gold. (+)-bornyl diphosphate synthase is the key enzyme in the (+)-borneol biosynthesis pathway. Despite several reported (+)-bornyl diphosphate synthase genes, relatively low (+)-borneol production hinders the attempts to synthesize it using microbial fermentation. Here, we identified the highly specific (+)-bornyl diphosphate synthase CbTPS1 from Cinnamomum burmanni. An in vitro assay showed that (+)-borneol was the main product of CbTPS1 (88.70% of the total products), and the K-m value was 5.11 +/- 1.70 mu M with a k(cat) value of 0.01 s(-1). Further, we reconstituted the (+)-borneol biosynthetic pathway in Saccharomyces cerevisiae. After tailored truncation and adding Kozak sequences, the (+)-borneol yield was improved by 96.33-fold to 2.89 mg.L-1 compared with the initial strain in shake flasks. This work is the first reported attempt to produce (+)-borneol by microbial fermentation. It lays a foundation for further pathway reconstruction and metabolic engineering production of this valuable natural monoterpenoid.
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