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L-lysine production by systems metabolic engineering of an NADPH auto-regulated Corynebacterium glutamicum

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논문

L-lysine production by systems metabolic engineering of an NADPH auto-regulated Corynebacterium glutamicum

학술지

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

저자명

Liu, Jie; Ou, Ying; Xu, Jian-Zhong; Rao, Zhi-Ming; Zhang, Wei-Guo

초록

Here, the systems metabolic engineering of L-lysine-overproducing Corynebacterium glutamicum is described to create a highly efficient microorganism producer. The key chromosomal mutations associated with L-lysine synthesis were identified based on whole-genome sequencing. The carbon flux was subsequently redirected into the L-lysine synthesis pathway and increased the availability of energy and product transport systems required for L-lysine synthesis. In addition, a promoter library sensitive to intracellular L-lysine concentration was constructed and applied to regulate the NADPH pool dynamically. In the fed-batch fermentation experiment, the L-lysine titer of the final engineered strain was 223.4 ± 6.5 g/L. This study is the first to improve L-lysine production by enhancing ATP supply and NADPH self-regulation to improve the intracellular environment.

발행연도

2023

발행기관

Elsevier

ISSN

0960-8524

387

페이지

pp.129701

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1 2023-12-11

논문; 2023-11-01

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