미생물학회지 (Korean Journal of Microbiology)

  • 제33권1호
  • /
  • Pages.22-26
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  • 1997
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  • 0440-2413(pISSN)
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  • 2383-9902(eISSN)
한국미생물학회 (The Microbiological Society of Korea)
권호 표지

Pseudomonas sp. DJ77 균주에서 Extradiol Dioxygenase를 암호화하는 phnQ 유전자의 클로닝과 대장균에서의 발현

Cloning of phnQ Gene Encoding Extradiol Dioxygenase from Pseudomonas sp. DJ77 and Its Expression in Escherichia coli

  • 발행 : 1997.03.01
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초록

Pseudomonas sp. DJ77의 게놈 library로부터 phenanthrene 분해에 관련된 유전자를 포함하는 약 5-kb의 XhoI 절편을 pBLUESCRIPT SK(+)로 클로닝하였으며, 이 재조합 plasmid를 pUPX5라 명명하였다. 이 재조합 균주에 catechol과 2,3-dihydroxybiphenyl 용액을 분무하면 노란색의 meta-cleavage 화합물이 생성됨을 관찰 할 수 있었다. 그리고 효소 활성을 측정한 결과 catechol에서보다 2,3-dihydroxybiphenyl에 더 큰 활성을 나타냈다. 이 부분에 존재하는 2,3-dihydroxybiphenyl 1,2-dioxygenase 유전자의 위치를 결정하고, 이 유전자를 phnQ라 명명하였다.

We cloned the 5~kb Xlwl fragment containing gene responsible for degrad"tion of phenanthrene using pBLUES~ CRIPT SK( +) vector and E. coli XLI-Blue strain from the genomic library of Pseudomonas sp. 0177 and this recombinant plasmid was named pUPX5. The strain containing pUPX5 could produce a yellow meta-cleavage product using 2.3-dihydroxybiphenyl as a substrate. This strain have a higher activity toward 2,3-dihydroxybiphenyl than catechol. We sub cloned and localized the gene encoding 2.3-dihydroxybiphenyl-1.2-dioxygenase. which is designated as phn$\Omega$.

키워드

참고문헌

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