Journal of Food Hygiene and Safety (한국식품위생안전성학회지)

The Korean Society of Food Hygiene and Safety (한국식품위생안전성학회)
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Partial Purification of Bacteriocin Produced by Enterococcus faecium MJ-14 Isolated from Meju

메주에서 분리된 Enterococcus faecium MJ-14가 생산하는 박테리오신의 부분정제

  • Lee Jong-Gab (Department of Hotel Culinary Arts, Tongmyong College) ;
  • Lee Goon-Ja (Department of Hotel Culinary Arts, Tongmyong College) ;
  • Lim Sung-Mee (Department of Hotel Culinary Arts, Tongmyong College)
  • Published : 2005.12.01
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Abstract

The bacteriocin produced by E. faecium MJ-14 was precipitated with $50\%$ saturated ammonium sulfate in MRS broth and then the precipitated protein was dissolved in 20 mM sodium phosphate buffer (pH 6.0). The crude bacteriocin was purified by CM-sepharose CL 6B and Sephacry S-100 column chormatograhy. In this case, the purification fold of the bacteriocin was 114, therefore, its activity was 127,293 BU/mg of specific activity. Result from SDS-PAGE of the purified bacteriocin, it was obtained two protein bands of 4.3 kDa and 5.8 kDa having antilisterial activity.

E. faecium MJ-14 균주의 배양 상등액에 $50\%$ 황산암모늄을 처리한 결과, 박테리오신 활성은 3,840 BU/mL으로 배양 상등액에 비해 6배 증가되었고 회수율은 약 $60\%$에 이르렀다. 이온교환크로마토그래피에 의해 용출된 획분 중 $48\∼76$번에서 항균 활성이 나타났으며, 용출물의 비활성은 35.7배 증가하였고, 회수율은 약 $41\%$였다. 그리고 겔 크로마토그래피에 의해 비활성 127,293 BU/mg인 박테리오신 단백질을 정제하였으며, 이 때 정제도는 114배, 수율은 $36\%$였다. 정제된 박테리오신 단백질을 SDS-FACE한 결과. 항균 활성을 나타내는 4.3 kDa과 5.8 kDa의 분자량을 확인하였다.

Keywords

References

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