Physiological Characteristics and Angiotensin Converting Enzyme Inhibitory Activity of Lactobacillus brevis HLJ59 Isolated from Salted Shrimp

국내 새우젓에서 분리한 Lactobacillus brevis HLJ59의 Angiotensin Converting Enzyme 저해활성 및 생리적 특성

  • Jeon, Chun-Pyo (Department of Bioresource Sciences, Andong National University) ;
  • Kim, Yun-Hoi (Department of Bioresource Sciences, Andong National University) ;
  • Lee, Jung-Bok (Department Food and Nutrition Science, Kundong University) ;
  • Jo, Min-Sub (Department of Bioresource Sciences, Andong National University) ;
  • Shin, Kee-Sun (Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Choi, Chung-Sig (Bio Industry Institute, HansBio Co. Ltd.) ;
  • Kwon, Gi-Seok (Department of Bioresource Sciences, Andong National University)
  • 전춘표 (안동대학교 생명자원과학과) ;
  • 김윤회 (안동대학교 생명자원과학과) ;
  • 이중복 (건동대학교) ;
  • 조민섭 (안동대학교 생명자원과학과) ;
  • 신기선 (한국생명공학연구원) ;
  • 최충식 ((주)한스바이오 부설바이오산업연구소) ;
  • 권기석 (안동대학교 생명자원과학과)
  • Received : 2009.11.24
  • Accepted : 2009.12.17
  • Published : 2010.03.31


In this study, lactic acid bacteria with high angiotensin converting enzyme inhibitor activity were isolated from Korean fermented food, such as kimchi and salted seafood. The strain HLJ59, isolated from salted shrimp showed the highest angiotensin converting enzyme inhibitor activity in DeMan Rogosa Sharpe broth. Optimum growth temperature of Lactobacillus brevis HLJ59 was at $34^{\circ}C$. Acid treatment at pH 3.0 for 1.5 h decreased cell viability from $9.9{\times}10^8$ CFU/ml to $3.11{\times}10^4$ CFU/ml. The bile extract concentration of 0.3%, 0.5%, and 1.0% in MRS broth did not inhibit the growth of HLJ59. Isolated strain HLJ59 showed more sensibility to amikacin, gentamycin, neomycin, streptomycin, kanamycin, cefmetazole, cephalothin, ampicillin, ticarcillin, sulbactam+ampicillin, amoxicillin+clavulanic acid (AMC), tetracycline, and sulfamethoxazole+trime thoprim (SXT) as compare to other 7 different antibiotics. However, it showed more resistance to cefoxatin, ceftnaxone, penicillin, ciprofloxacin, nalidixic acid, lincomycin, and chloramphenicol.

본 연구는 우리나라 전통 발효식품인 장류, 김치류 및 젓갈류로부터 angiotensin converting enzyme 저해활성이 우수한 젖산균을 분리하고자 하였다. 젖산균을 분리하기 위한 선택배지로서 bromocresol purple (BCP) 한천배지를 사용하여 1차적으로 젖산균을 분리하였으며, 그 중 angiotensin converting enzyme 저해활성이 우수한 균주를 최종 선발하였다. 분리된 젖산균을 16S rRNA 유전자 염기서열 분석으로 동정한 결과 Lactobacillus brevis ATCC $14869^T$와 99.7%의 유사도를 나타냄에 따라 L. brevis HLJ59로 명명하였다. L. brevis HLJ59는 내산성의 경우 pH가 2.0, 3.0으로 보정된 DeMan Rogosa Sharpe 액체배지에서 접종 후 각각 90분, 30분이 경과하였을 때 배양초기와 비교 시 약 99% 감소하는 결과를 보였으나, 담즙산(Bile extract)의 경우 1% 첨가 시에도 생육에 저해를 받지 않는 것으로 조사되어 L. brevis HLJ59 균주는 담즙산에 대한 내성이 우수한 균주임을 확인하였다. 항생제 내성의 경우 20종의 항생제를 paper disc법으로 조사한 결과 본 균주는 cephalosporin계의 cefoxatin (30 ${\mu}g$), ceftnaxone (30 ${\mu}g$), penicillin계의 penicillin (10 units), quinolones계 cprofloxacin (5 ${\mu}g$), nalidixic acid (30 ${\mu}g$), lincosamid계의 lincomycin (2 ${\mu}g$) 및 기타 chloramphenicol (30 ${\mu}g$)에 대해서는 내성을 가지고 있음을 확인하였다.


Grant : 마의 부가가치 증대 및 산업화를 위한 가공기술의 개발


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