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- W3136454535 abstract "Leuconostoc citreum, a type of food-grade probiotic bacteria, plays an important role in food fermentation and intestinal probiotics. Biofilms help bacteria survive under adverse conditions, and LuxS/AI-2-dependent quorum sensing (QS) plays an important role in the regulation of their biofilm-forming activities. L. citreum 37 was a biofilm-forming strain isolated from dairy products. The aim of this study was to analyze genes involved in the LuxS/AI-2 system based on genome sequencing and biofilm formation of L. citreum 37. Genome assembly yielded two contigs (one chromosome and one plasmid), and the complete genome contained 1,946,279 base pairs (bps) with a G + C content of 38.91%. The genome sequence analysis showed that there were several pathways such as the two-component system, QS, and seven other signal pathways, and 26 genes (including luxS, pfs, and 24 other genes) may participate in QS related to biofilm formation. All these results showed that the LuxS/AI-2 system is complete in the genome of L. citreum 37. The quantitative polymerase chain reaction (qPCR) of pfs, luxS genes, and AI-2 production of L. citreum 37 in planktonic state and biofilm state showed that the expression of pfs and luxS genes was consistent with the production of AI-2 and was positively correlated with biofilm formation. After luxS of L. citreum 37 expressed in Escherichia coli BL21, AI-2 production was detected, suggesting that the luxS gene played an important role in AI-2 synthesis, Therefore, luxS may regulate the biofilm formation of L. citreum 37 by participating in AI-2 synthesis. It is projected that results of this study could help facilitate further understanding and application of L. citreum 37.The online version contains supplementary material available at 10.1007/s13205-021-02747-2." @default.
- W3136454535 created "2021-03-29" @default.
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- W3136454535 date "2021-03-23" @default.
- W3136454535 modified "2023-10-12" @default.
- W3136454535 title "Research on the role of LuxS/AI-2 quorum sensing in biofilm of Leuconostoc citreum 37 based on complete genome sequencing" @default.
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- W3136454535 doi "https://doi.org/10.1007/s13205-021-02747-2" @default.
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