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Deciphering the crucial roles of transcriptional regulator GadR on gamma-aminobutyric acid production and acid resistance in Lactobacillus brevis

机译:破解转录调节剂GadR对短乳杆菌γ-氨基丁酸生产和抗酸性的关键作用

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摘要

BackgroundIn lactic acid bacteria (LAB), acid stress leads to decreases of cell vitality and fermentation yield. Glutamate decarboxylase (GAD) system is regarded as one of the essential acid-resistance mechanisms in LAB. However, the regulation of GAD system is not well identified in the genus Lactobacillus. Although potential transcriptional regulator gene located upstream of GAD system genes was found in several Lactobacillus species, such as Lactobacillus (L.) brevis, the contribution of the regulator to acid resistance of the genus Lactobacillus has not been experimentally determined.
机译:背景技术在乳酸菌(LAB)中,酸胁迫导致细胞活力和发酵产量下降。谷氨酸脱羧酶(GAD)系统被认为是LAB中必需的抗酸机制之一。但是,在乳杆菌属中尚未很好地鉴定GAD系统的调节。尽管在几种乳杆菌,例如短乳杆菌中发现了位于GAD系统基因上游的潜在转录调节因子基因,但是该调节剂对乳杆菌属的耐酸性的贡献尚未通过实验确定。

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