Improving 3-phenyllactic acid production of AB-1 by enhancing its quorum-sensing capacity.

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ID: 1903
2019
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Abstract
3-Phenyllactic acid (PLA) is a novel and natural antimicrobial compound. However, the concentration of PLA produced by native microbes was rather low. To enhance the production of PLA of AB-1, the microcapsules of AB-1 cells with a high quorum-sensing capacity was established and investigated. In addition, the relation between PLA production and quorum sensing was further investigated and confirmed by adding the exogenous 4,5-dihydroxy-2,3-pentanedione (DPD, AI-2 precursor). The results indicated that the PLA production of in microencapsulated cells (MC cells) was higher than that of the free cells, and the lactate dehydrogenase activity, autoinducer-2 (AI-2) levels and the relative expression of the gene were also significantly increased in MC cells ( < 0.05). In addition, the cell growth, AI-2 levels and PLA production of AB-1 were also significantly promoted after adding 24 μM exogenous DPD. The results suggest that the PLA production of was partly regulated by the AI-2/LuxS system, and microencapsulation can increase the local AI-2 level and enhance QS capacity, which are beneficial to PLA production. The results may provide a new insight and experimental basis for the industrial production of PLA.
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yang2019improvingjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yang, Xiaoyuan;Li, Jianpeng;Shi, Guocui;Zeng, Mingyong;Liu, Zunying;
Journal Journal of food science and technology
Year 2019
DOI
10.1007/s13197-019-03746-1
URL
Keywords Keywords not found

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