Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Mutations in the PPE Genes that Confer Resistance to a Nitroimidazopyran Drug on Mycobacterium bovis Strains

Mycobacterium bovis 균주들이 nitroimidazopyran 항생제에 내성을 갖게 해주는 PPE 유전자들의 돌연변이들

  • Bae Young-Min (Department of Microbiology, University of Iowa) ;
  • Daniels Lacy (Department of Microbiology, University of Iowa)
  • 배영민 (Iowa 대학교 미생물학과) ;
  • Published : 2005.04.01
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Abstract

We used the IS1096 transposon to construct Mycobacterium bovis BCG mutants resistant to an antituberculosis drug PA-824 and isolated several different mutants. We identified the locations of the insertions and found that the insertions were at various sites including the genes for the PPE proteins. HPLC analyses of the extracts of these five PPE mutant cells showed that three mutants produced only F0, and intermediate for the synthetic pathway of coenzyme $F^{420}$, and the remaining two neither F0 nor $F^{420}$. These data suggest that the products of these PPE genes are somehow involved in the biosynthesis of the coenzyme $F^{420}$.

IS1096 transposon을 사용하여 결핵균군에 작용하는 항생제인 PA-824에 내성을 나타내는 Mycobacterium bovis BCG의 돌연변이 균주를 얻고자 하였고, 그 결과 24종류의 서로 다른 돌연변이 균주를 얻을 수 있었다. Transposon이 insertion된 부위를 알아내기 위해서 각각의 돌연변이 균주로 inverse PCR을 수행하였고, PPE 유전자를 포함한 여러 가지 부위에 insertion된 transposon의 위치를 확인할 수 있었다. PPE 유전자에 insertion돌연변이가 발생한 5개 균주의 세포 추출물을 HPLC로 분석한 결과, 3개에서는 야생균주에서 관찰되는 coenzyme $F^{420}$이 존재하지 않았고, 그 생합성 경로의 중간산물인 F0만 존재하였다. 또한 나머지 2개에서는 F0 또는 $F^{420}$어느 것도 존재하지 않았다. 이 결과는 PPE 유전자들의 산물들이 coenzyme $F^{420}$에 어떤 식으로든 관여하고 있음을 나타낸다고 할 수 있다.

Keywords

References

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