Antibacterial Activity and Probiotic Potential of Lactobacillus plantarum HKN01: A New Insight into the Morphological Changes of Antibacterial Compound-Treated Escherichia coli by Electron Microscopy
자연과학 > 생물
( Sharafi hakimeh ) , ( Hadi Maleki ) , ( Gholamreza Ahmadian ) , ( Hossein Shahbani Zahiri ) , ( Neda Sajedinejad ) , ( Behzad Houshmand ) , ( Hojatollah Vali ) , ( Kambiz Akbari Noghabi )
한국미생물생명공학회(구 한국산업미생물학회)
Journal of Microbiology and Biotechnology 2013년, 제23권 제2호, 225~236페이지(총12페이지)
05212212.pdf [무료 PDF 뷰어 다운로드]
  • ※ 본 자료는 참고용 논문으로 수정 및 텍스트 복사가 되지 않습니다.
  • 구매가격
    156원 (구매자료 3% 적립)
    이메일 발송  스크랩 하기
    자료 다운로드  네이버 로그인
    Among several bacteria examined, an antibacterial-producing Lactobacillus strain with probiotic characteristics was selected and identified based on 16S rRNA gene sequencing. Subsequent purification and mode of action of the antibacterial compounds on target cells including E. coli were investigated. Maximum production of the antibacterial compound was recorded at 18 h incubation at 30oC. Interestingly, antibacterial activity remained unchanged after heating at 121oC for 45 min, 24 h storage in temperature range of 70oC to room temperature, and 15 min exposure to UV light, and it was stable in the pH of range 2-10. The active compounds were inactivated by proteolytic enzymes, indicating their proteinaceous nature, and, therefore, referred to as bacteriocin-like inhibitory substances. Isolation and partial purification of the effective agent was done by performing ammonium sulfate precipitation and gel filtration chromatography. The molecular mass of the GFC-purified active compound (~3 kDa) was determined by Tris-Tricine SDS-PAGE. To predict the mechanisms of action, transmission electron microscopy (TEM) analysis of ultrathin sections of E. coli before and after antibacterial treatment was carried out. TEM analysis of antibacterial compounds-treated E. coli demonstrated that the completely altered bacteria appear much darker compared with the less altered bacteria, suggesting a change in the cytoplasmic composition. There were also some membrane-bound convoluted structures visible within the completely altered bacteria, which could be attributed to the response of the E. coli to the treatment with the antibacterial compound. According to the in vivo experiments oral administration of L. plantarum HKN01 resulted in recovery of infected BALB/c mice with Salmonella enterica ser. Typhimurium.
    오늘 본 자료
    • 오늘 본 자료가 없습니다.
    본 학술논문은 한국학술정보㈜ 각 학회간에 저작권 계약이 체결된 것으로 HAPPY학술이 제공하고 있습니다.
    본 저작물을 불법적으로 이용시는 법적인 제재가 가해질 수 있습니다.
    사업자등록번호 220-87-87785 대표.신현웅 주소.서울시 서초구 방배로10길 18, 402호 대표전화.070-8809-9397
    개인정보책임자.박정아 통신판매업신고번호 제2017-서울서초-1765호 이메일
    copyright (c) 2009 happynlife. steel All reserved.