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Overproduction of L-piperazic acid by overexpression of ArgB gene in Aureobasidium melanogenum DFAK1Chen, Hao; Kong, Cun-Cui; Wei, Xin; Chi, Zhe; Liu, Guang-Lei; Chi, Zhen-Ming
Process biochemistry (1991), March 2023, 2023-03-00, Volume: 126Journal Article
L-piperazic acid (L-Piz) is one of components in many bioactive compounds synthesized by Streptomyces spp. Therefore, it is very important to develop a sustainable and eco-friendly bioprocess to produce L-Piz from renewable glucose. In this study, it was found that the engineered Aureobasidium melanogenum DFAK-ArgB6 strain overexpressing the ArgB gene encoding N-acetylglutamate kinase could produce 3.0 g/L L-Piz from glucose during the fed-batch fermentation. The yield was 55.6 mg L-Piz/g of glucose and the productivity was 24.8 mg/L/h. This was the highest amount of L-Piz produced by microorganisms so far. Finally, the partially purified L-Piz had purity of 86.4%. Display omitted •L-piperazic acid (L-Piz) is one of components in many bioactive compounds.•The DFAK-ArgB6 strain could produce the highest amount of L-Piz (3.0 g/L).•The partially purified L-Piz was obtained.
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