Tyrosine decarboxylase activity of Enterococcus mundtii: new insights into phenotypic and genetic aspects.

ABSTRACT: Few information is available about the tyraminogenic potential of the species Enterococcus mundtii. In this study, two plant-derived strains of E. mundtii were selected and investigated to better understand the phenotypic behaviour and the genetic mechanisms involved in tyramine accumulation. Both the strains accumulated tyramine from the beginning of exponential phase of growth, independently on the addition of tyrosine to the medium. The strains accumulated also 2-phenylethylamine, although with lower efficiency and in greater extent when tyrosine was not added. Accordingly, the tyrosine decarboxylase (tyrDC) gene expression level increased during the exponential phase with tyrosine added, while it remained constant and high without precursor. The genetic organization as well as sequence

SUBMITTER: Gatto V 

PROVIDER: S-EPMC5072196 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature