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- W4319069604 abstract "Systematic screening of morphine pathway intermediates in engineered yeast revealed key biosynthetic enzymes displaying potent feedback inhibition: 3′-hydroxy-N-methylcoclaurine 4′-methyltransferase (4′OMT), which yields (S)-reticuline, and the coupled salutaridinol-7-O-acetyltransferase (SalAT) and thebaine synthase (THS2) enzyme system that produces thebaine. The addition of deuterated reticuline-d1 to a yeast strain able to convert (S)-norcoclaurine to (S)-reticuline showed reduced product accumulation in response to the feeding of all four successive pathway intermediates. Similarly, the addition of deuterated thebaine-d3 to a yeast strain able to convert salutaridine to thebaine showed reduced product accumulation from exogenous salutaridine or salutaridinol. In vitro analysis showed that reticuline is a noncompetitive inhibitor of 4′OMT, whereas thebaine exerts mixed inhibition on SalAT/THS2. In a yeast strain capable of de novo morphine biosynthesis, the addition of reticuline and thebaine resulted in the accumulation of several pathway intermediates. In contrast, morphine had no effect, suggesting that circumventing the interaction of reticuline and thebaine with 4′OMT and SalAT/THS2, respectively, could substantially increase opiate alkaloid titers in engineered yeast." @default.
- W4319069604 created "2023-02-04" @default.
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- W4319069604 date "2023-02-03" @default.
- W4319069604 modified "2023-09-30" @default.
- W4319069604 title "Strong Feedback Inhibition of Key Enzymes in the Morphine Biosynthetic Pathway from Opium Poppy Detectable in Engineered Yeast" @default.
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- W4319069604 doi "https://doi.org/10.1021/acschembio.2c00873" @default.
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- W4319069604 hasPublicationYear "2023" @default.
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