Abstract
Here, we have analysed and explored the genome sequences of three newly isolated bacteria that were recently characterised for their probiotic activities and ability to produce bacteriocins. These strains, isolated from faeces of animals living in captivity at the zoological garden of Lille (France), are Escherichia coli ICVB443, Enterococcus faecalis ICVB501 and Pediococcus pentosaceus ICVB491. Their genomes have been analysed and compared to those of their pathogenic or probiotic counterparts. The genome analyses of E. coli ICVB443 and Ent. faecalis ICVB501 displayed similarities to those of probiotics E. coli 1917 Nissle, and Ent. faecalis Symbioflor 1, respectively. Furthermore, E. coli ICVB443 shares at least 89 genes with the enteroaggregative E. coli 55989 (EAEC), and Ent. faecalis ICVB501 shares at least 315 genes with the pathogenic Ent. faecalis V583 strain. Unlike Ped. pentosaceus ICVB491, which is devoid of virulence genes, E. coli ICVB443 and Ent. faecalis ICVB501 both carry genes encoding virulence factors on their genomes. Of note, the bioinformatics analysis of these two genomes located the bsh gene, which codes for bile salt hydrolase (BSH). The presence of BSH is of major importance, as it can help to increase the viability of these two strains in the gastrointestinal tract (GIT). The genome analysis of Ped. pentosaceus ICVB491 confirmed its GRAS status (Generally Recognised As Safe), as no genomic virulence factor determinant was found.






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Acknowledgements
Mégane Eveno was a recipient of PhD from Lille University (France) and Laval University (Québec, Canada) through the Natural Sciences and Engineering Research Council of Canada (NSERC) METABIOLAC Industrial Research Chair awarded for Prof. Fliss and NSERC Industrial Research Chair on ElectroMembrane processes aiming the ecoefficiency improvement of biofood production lines (Grant IRCPJ 492889-15 to Laurent Bazinet). Research at Lille University was supported by CPER/FEDER Alibiotech programme 2016/2021. The authors are indebted to Dr. S. Elson for critical reading of the manuscript.
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Eveno, M., Belguesmia, Y., Bazinet, L. et al. In silico analyses of the genomes of three new bacteriocin-producing bacteria isolated from animal’s faeces. Arch Microbiol 203, 205–217 (2021). https://doi.org/10.1007/s00203-020-02016-5
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DOI: https://doi.org/10.1007/s00203-020-02016-5


