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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 1,064 - 1,079 (16page)
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초록· 키워드
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In this study, the antimicrobial activity of a bacteriocin produced by Enterococcus faecalis KT11, isolated from traditional Kargı Tulum cheese, was determined, and bacteriocin KT11 was partially characterized. The results showed that bacteriocin KT11 was antagonistically effective against various Gram-positive and Gram-negative test bacteria, including vancomycin- and/or methicillin-resistant bacteria. The activity of bacteriocin KT11 was completely abolished after treatment with proteolytic enzymes (proteinase K, ${\alpha}$-chymotrypsin, protease and trypsin), which demonstrates the proteinaceous nature of this bacteriocin. Additionally, bacteriocin KT11 remained stable at pH values ranging from 2 to 11 and after autoclaving at $121^{\circ}C$ for 30 min. In addition, the activity of bacteriocin KT11 was stable after treatment with several surfactants (EDTA, SDS, Triton X-100, Tween 80 and urea) and organic solvents (chloroform, propanol, methanol, ethyl alcohol, acetone, hexane and ethyl ether). Cell-free supernatant of E. faecalis KT11 was subjected to ammonium sulfate precipitation and then desalted by using a 3.5-kDa cut-off dialysis membrane. The bacteriocin activity was determined to be 711 AU/mL in the dialysate. After tricine-SDS-PAGE analysis, one peptide band, which had a molecular weight of ~3.5 kDa, exhibited antimicrobial activity. Because the bacteriocin KT11, isolated from E. faecalis KT11, exhibits a broad antimicrobial spectrum, heat stability and stability over a wide pH range, this bacteriocin can be used as a potential bio-preservative in foods. Additionally, bacteriocin KT11 alone or in combination with conventional antibiotics may provide a therapeutic option for the treatment of multidrug-resistant clinical pathogens after further in vivo studies.
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참고문헌 (47)
참고문헌 신청
Abbasiliasi S / 2017 / Fermentation factors influencing the production of bacteriocins by lactic acid bacteria : A review / RSC Adv 7:29395~29420
Abriouel H / 2005 / Enterocin AS-48RJ : A variant of enterocin AS-48 chromosomally encoded by Enterococcus faecium RJ16 isolated from food / Syst Appl Microbiol 28:383~397
Aspri M / 2017 / Application of bacteriocin-producing Enterococcus faecium isolated from donkey milk, in the bio-control of Listeria monocytogenes in fresh whey cheese / Int Dairy J 73:1~9
Bradford MM / 1976 / A rapid and sensitive method for quantitation of microgram quantities of protein utilizing the principle of protein-dye-binding / Anal Biochem 72:248~254
Braïek OB / 2017 / Isolation and characterisation of an enterocin P-producing Enterococcus lactis strain from a fresh shrimp(Penaeus vannamei) / Antonie van Leeuwenhoek 110:771~786
Abriouel H / 2005 / Enterocin AS-48RJ : A variant of enterocin AS-48 chromosomally encoded by Enterococcus faecium RJ16 isolated from food / Syst Appl Microbiol 28:383~397
Aspri M / 2017 / Application of bacteriocin-producing Enterococcus faecium isolated from donkey milk, in the bio-control of Listeria monocytogenes in fresh whey cheese / Int Dairy J 73:1~9
Bradford MM / 1976 / A rapid and sensitive method for quantitation of microgram quantities of protein utilizing the principle of protein-dye-binding / Anal Biochem 72:248~254
Braïek OB / 2017 / Isolation and characterisation of an enterocin P-producing Enterococcus lactis strain from a fresh shrimp(Penaeus vannamei) / Antonie van Leeuwenhoek 110:771~786
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