Bacteriocinogenic Lactococcus lactis subsp. lactis DF04Mi isolated from goat milk: characterization of the bacteriocin

Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]
Danielle N FurtadoBernadette D G M Franco

Abstract

Lactic acid bacteria capable of producing bacteriocins and presenting probiotic potential open innovative technological applications in the dairy industry. In this study, a bacteriocinogenic strain (Lactococcus lactis subsp. lactis DF4Mi) was isolated from goat milk, and studied for its antimicrobial activity. The bacteriocin presented a broad spectrum of activity, was sensitive to proteolytic enzymes, resistant to heat and pH extremes, and not affected by the presence of SDS, Tween 20, Tween 80, EDTA or NaCl. Bacteriocin production was dependent on the components of the culture media, especially nitrogen source and salts. When tested by PCR, the bacteriocin gene presented 100% homology to nisin Z gene. These properties indicate that this L. lactis subsp. lactis DF4Mi can be used for enhancement of dairy foods safety and quality.

Citations

May 28, 2019·Probiotics and Antimicrobial Proteins·Danielle Nader FurtadoSvetoslav Dimitrov Todorov

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Methods Mentioned

BETA
PCR

Software Mentioned

BLAST
Basic Local Alignment Search Tool

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