학술논문
Isolation of a Lactococcus lactis Strain Producing Anti-staphylococcal Bacteriocin
이용수 4
- 영문명
- 발행기관
- 한국축산식품학회
- 저자명
- Jung-Mo Yang Gi-Seong Moon
- 간행물 정보
- 『Food Science of Animal Resources』Korean Journal for Food Science of Animal Resources 제38권 제6호, 1315~1321쪽, 전체 7쪽
- 주제분류
- 농수해양 > 식품과학
- 파일형태
- 발행일자
- 2018.12.31
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국문 초록
영문 초록
Bacteriocin is ribosomally synthesized by bacteria and inhibits closely related species. In this study we aimed at isolating lactic acid bacteria producing bacteriocin presenting anti-staphylococcal activity. A Lactococcus lactis strain was isolated from kimchi for the purpose and identified by 16S rRNA gene sequencing. As preliminary tests, optimal culture conditions, stabilities against heat, solvents, and enzymes treatments, and type of action (bacteriostatic or bactericidal) of the bacteriocin were investigated. The optimal culture conditions for production of the bacteriocin were MRS broth medium and 25℃ and 30℃ culture temperatures. The bacteriocin was acidic and the activity was abolished by a protease treatment. Its stability was maintained at 100℃ for 15 min and under treatments of various organic solvents such as methanol, ethanol, acetone, acetonitrile, and chloroform. Finally, the bacteriocin showed bactericidal action against Staphylococcus aureus where 200 AU/mL of the bacteriocin decreased the viable cell count (CFU/mL) of S. aureus by 2.5 log scale, compared with a control (no bacteriocin added) after 4-h incubation.
목차
Introduction
Materials and Methods
Results and Discussion
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