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- W4304474602 abstract "β-Nicotinamide mononucleotide (NMN) has been widely used as a nutraceutical for self-medication. The one-step conversion of nicotinamide riboside (NR) to β-NMN has been considered to be the most promising synthetic route for β-NMN. Here, human nicotinamide riboside kinase 2 (NRK-2) was functionally displayed on the cell surface of Saccharomyces cerevisiae EBY100, forming a whole-cell biocatalyst (Whole-cell NRK-2). Whole-cell NRK-2 could convert nicotinamide riboside (NR) to β-NMN efficiently in the presence of ATP and Mg2+, with a maximal activity of 64 IU/g (dry weight) and a Km of 3.5 μM, similar to that of free NRK-2 reported previously. To get the best reaction conditions for β-NMN synthesis, the amounts of NR, ATP, and Mg2+ used, pH, and temperature for the synthetic reaction were optimized. Using Whole-cell NRK-2 as the catalyst under the optimized conditions, β-NMN synthesized from NR reached a maximal conversion rate of 98.2%, corresponding to 12.6 g/L of β-NMN in the reaction mixture, which was much higher than those of synthetic processes reported. Additionally, Whole-cell NRK-2 had good pH stability and thermostability, required no complicated treatments before or after use, and could be reused in sequential production. Therefore, this study provided a safe, stable, highly effective, and low-cost biocatalyst for the preparation of β-NMN, which has great potential in industrial production." @default.
- W4304474602 created "2022-10-12" @default.
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- W4304474602 date "2022-10-11" @default.
- W4304474602 modified "2023-09-30" @default.
- W4304474602 title "Yeast Cell Surface Engineering of a Nicotinamide Riboside Kinase for the Production of β-Nicotinamide Mononucleotide via Whole-Cell Catalysis" @default.
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- W4304474602 doi "https://doi.org/10.1021/acssynbio.2c00350" @default.
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