Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Purification and characterization of biochemical properties of hemolysin from Vibrio fluvialis

Vibrio fluvialis 유래의 hemolysin 정제와 생화학적 특성

  • 이종희 (부경대학교 생물공학과) ;
  • 한정현 (부경대학교 생물공학과) ;
  • 안선희 (부경대학교 생물공학과) ;
  • 김선회 (부경대학교 생물공학과) ;
  • 이은미 (부경대학교 생물공학과) ;
  • 공인수 (부경대학교 생물공학과)
  • Published : 2002.08.01
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Abstract

Hemolysin (VFH) of V. fluvialis, which is a pathogenic bacteria, causing watery diarrhea with vomiting, abdominal croup, was purified. V. fluvialis was cultivated in BHI medium and the culture supematant was precipitated by ammonium sulfate. The protein was purified by chromatographies on columns of DEAE-cellulose and Mono-Q. Molecular weight of the purified VFH was estimated as 79kDa by SDS-PAGE. The optimal temperature for a maximum hemolytic activity was at around 35$^{\circ}C$ and the activity was decreased at 4$0^{\circ}C$ Cytotoxicity of VFH was also investigated using RTG-2 cell line. LDH assay study showed that 50$\mu\textrm{g}$/m1 of VFH release 80% of total cellular LDH (lactate dehydrogenase) from RTG-2 cell and microscopic observation also showed the morphological change of cell.

병원성 미생물인 Vibrio fluvialis로부터 hemolysin을 분리정제 하였다. 즉, hemolysin의 정제는 균 배양액을 황산암모늄, ion exchange chromatography를 행하였으며 SDS-PAGE를 통해 그 단백질의 크기가 약 79kDa임을 알게되었다. 정제된 hemolysin (VFH)는 35$^{\circ}C$에서 최적활성을 나타내었고, 4$0^{\circ}C$에서는 그 활성이 감소되었다. RTG-2 어류유래 세포주에 hemolysin (VFH)의 처리로 세포독성을 측정한 결과 50$\mu\textrm{g}$의 VFH가 약 80%의 cell line을 사멸시켰다. 또한 현미경을 통한 관찰에서도 세포의 형태변화를 관찰할 수 있었다.

Keywords

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