Evaluation of Biogenic Amine Degradation Ability of Staphylococcus xylosus JCM 2418 and its Application in Shrimp Paste

ABSTRACTMicrobial strains with amine oxidase activity could effectively degrade undesirable biogenic amines in food. Staphylococcus xylosus JCM 2418 was sensitive to common antibiotics, without hemolysis, and had protease activity. A 15% salt concentration was beneficial to the expression of the amine oxidase gene (yobN), restricted the expression of the lysine decarboxylase gene (ldc), and was more effective in degrading biogenic amines. The strain was inoculated in shrimp paste as a co-starter to promote the formation of volatile odor. Additionally, the tyramine, putrescine, cadaverine, and histamine levels were reduced by 42.4, 16.4, 22.2, and 20.8%, respectively.KEYWORDS: Staphylococcus xylosus JCM 2418shrimp pasteBA degradationamine oxidase gene Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by Program for the National Key R&D Program of China [2017YFC1600403].