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Title

Construction and characterization of a double mutant of Enterococcus faecalis that does not produce biogenic amines

AuthorsPérez, Marta; Calles-Enríquez, Marina ; Río Lagar, Beatriz del ; Redruello, Begoña ; Jong, Anne de; Kuipers, O. P.; Kok, Jan; Martín, M. Cruz ; Ladero Losada, Víctor Manuel ; Fernández García, María ; Álvarez González, Miguel Ángel
Issue Date14-Nov-2019
PublisherSpringer Nature
CitationScientific Reports 9: 16881 (2019)
AbstractEnterococcus faecalis is a lactic acid bacterium characterized by its tolerance of very diverse environmental conditions, a property that allows it to colonize many different habitats. This species can be found in food products, especially in fermented foods where it plays an important role as a biopreservative and influences the development of organoleptic characteristics. However, E. faecalis also produces the biogenic amines tyramine and putrescine. The consumption of food with high concentrations of these compounds can cause health problems. The present work reports the construction, via homologous recombination, of a double mutant of E. faecalis in which the clusters involved in tyramine and putrescine synthesis (which are located in different regions of the chromosome) are no longer present. Analyses showed the double mutant to grow and adhere to intestinal cells normally, and that the elimination of genes involved in the production of tyramine and putrescine has no effect on the expression of other genes.
Publisher version (URL)http://dx.doi.org/10.1038/s41598-019-53175-5
URIhttp://hdl.handle.net/10261/201803
Identifiersdoi: 10.1038/s41598-019-53175-5
issn: 2045-2322
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