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Metabolic engineering study demonstrates high-yield neo-allo-ocimene production in engineered Escherichia coli, highlighting a sustainable route for industrial biomanufacturing.
Neo-allo-ocimene is a monoterpene which could be applied in pesticides, fragrances, and sustainable polymers. In this study, we mined a terpene synthase, AgTPS40, from the transcriptome of celery leaf tissues. Through sequence and phylogenetic analysis, AgTPS40 was characterized as a monoterpene synthase. The AgTPS40 gene was introduced into a heterologous mevalonate pathway hosted in Escherichia coli to enable terpene production. Gas chromatography–mass spectrometry analysis confirmed that AgTPS40 catalyzes the formation of neo-allo-ocimene, marking the first reported identification of a neo-allo-ocimene synthase. Subsequently, we optimized the fermentation conditions and achieved a yield of 933.35 mg/L in a 1 L shake flask, which represents the highest reported titer of neo-allo-ocimene to date. These results reveal the molecular basis of neo-allo-ocimene synthesis in celery and provide a sustainable way to obtain this compound.
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Liu et al. (2025) studied this question.
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