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- W4241574809 abstract "Abstract Background: L-ornithine is a basic amino acid, which shows significant value in food and medicine industries. Xylose is the most important alternative carbon source of glucose in lignocellulosic hydrolysate. It is urgent to develop a high-efficiency cell factory for L-ornithine production with glucose and xylose. Results: In this study, the genes enconding xylose isomerase and xylulose kinase were introduced into Corynebacterium glutamicum S9114 to establish xylose metabolism pathway, and then xylose became a substitute carbon source of glucose. In addition, the optimization and overexpression of phosphoenolpyruvate carboxylase and pentose transporter had been conducted to promote the synthesis of L-ornithine for the first time. Furthermore, though optimizing the concentration ratio of glucose and xylose (7:3), adding biotin and thiamine hydrochloride, we arrived at the highest L-ornithine yield 41.5g/L in shaking flask fermentation so far. Conclusions: Our results demonstrate that the combination of metabolic engineering and the optimization of fermentation process can make great potential for L-ornithine production by lignocellulose hydrolysate." @default.
- W4241574809 created "2022-05-12" @default.
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- W4241574809 date "2020-09-22" @default.
- W4241574809 modified "2023-10-16" @default.
- W4241574809 title "Improvement of Xylose Utilization and L-ornithine Production by Metabolic Engineering of Corynebacterium glutamicum" @default.
- W4241574809 doi "https://doi.org/10.21203/rs.3.rs-81006/v1" @default.
- W4241574809 hasPublicationYear "2020" @default.
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