Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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DNA Microarray Analysis of Gene Expression in Antifungal Bacterium of Bacillus lentimorbus WJ5

DNA microarray를 이용한 항진균 활성세균 Bacillus lentimorbus WJ5의 유전자 발현 분석

  • 이영근 (한국원자력연구소 방사선이용연구부) ;
  • 김재성 (한국원자력연구소 방사선이용연구부) ;
  • 장유신 (한국원자력연구소 방사선이용연구부) ;
  • 조규성 (한국원자력연구소 방사선이용연구부) ;
  • 장화형 (한국원자력연구소 방사선이용연구부)
  • Published : 2003.09.01
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Abstract

The simultaneous expression levels of antifungal activity related genes was analyzed by DNA microarray. We constructed DNA chips contained 2,000 randomly digested genome spots of the antifungal bacterium of Bacillus lentimorbus WJ5 and compared its quantitative aspect with 7 antifungal activity deficient mutants induced by gamma radiation ($^{60}Co$). From the analysis of microarray hybridization by the Gene Cluster (Michael Eisen, Stanford Univ.), totally 408 genes were expressed and 20 genes among them were significantly suppressed in mutants. pbuX (xanthine permease, K222), ywbA (phosphotransferase system enzyme II, K393), ptsG (PTS glucose specific enzyme II ABC component, K877), yufO (ABC transporter (ATP-binding protein), K130l), and ftsY (signal recognition particle (docking protein), K868) were simultaneously down-regulated in all mutants. It suggested that they were supposed to be related to the antifungal activity of B. lentimorbus WJ5.

여러 항진균 활성 관련 유전자들의 발현 수준을 동시에 연구하기 위하여 DNA microarray를 이용하여 유전자들의 발현 패턴을 비교 분석하였다. 본 연구에서는 항진균활성을 가지는Bacillus lentimorbus WJ5의 genomic DNA를 무작위 하게 제한효소로 절단하여 2,000개의 DNA단편을 microarray하였으며, 감마선($^{60}Co$)조사로 유도된 7종의 항진균 활성 결핍 돌연변이체와 발현양상을 정량적으로 비교하였다. Gene Cluster (Michael Risen, Stanford Uniy.)를 이용한 DNA microarray의 분석 결과, 총 408개의 DNA 단편이 발현되는 것을 확인할 수 있었으며, 이들 중 20개의 DNA단편이 항진균 활성 결핍 돌연변이체에서 발현이 억제되는 것으로 나타났다. 특히,pbuX (xanthine permease, K222), ywbA (phosphotransferase system enzyme II, K393), ptsG (PTS glucose specific enzyme II ABC component, K877), yufO (ABC transporter(ATP-binding protein), K1301), 그리고 ftsY (signal recognition particle (docking protein), K868)는 모든 돌연변이체에서 동시에 발현되는 down-regulation된 유전자들로서 물질 이동과 관련된 것으로 보고되어 있으며, 항진균 활성 관련 신호 및 물질의 이동에 관여할 것으로 사료되어진다.

Keywords

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