KSBB Journal

  • 제19권4호
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  • Pages.308-314
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  • 2004
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  • 1225-7117(pISSN)
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  • 2288-8268(eISSN)
한국생물공학회 (The Korean Society for Biotechnology and Bioengineering)
권호 표지

희소 방선균 Sebekia benihana 유래 신규 사이토크롬 P450 하이드록실레이즈 유전자군 분리 및 염기서열 특성규명

Isolation and Nucleotide Sequence Characterization of Novel Cytochrome P450 Hydroxylase Genes from Rare Actinomycetes, Sebekia benihana

  • 발행 : 2004.08.01
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초록

모넨신, 니저리신, 사이클로스포린 등을 하이드록실레이션 시키는 균주인 S. benihana에 존재하는 여러 가지 CYP를 클로닝하기 위해, 방선균 CYP의 보존된 부분을 통해서 degenerate primer를 제작하였고, colony hybridization을 통해서 스크리닝 한 결과 총 5 종류의 CYP가 검색되었다. 아미노산 서열의 분석 결과 방선균의 CYP 들과 매우 높은 유사성을 가졌으며, 이들 CYP의 앞 뒤 서열의 검색 결과 이 중 4개의 CYP의 downstream에는 FD 유전자가 존재함을 알 수 있었다. CYP503의 경우 다른 나머지 4개의 CYP의 서열과 차이가 많았으며, 2차 대사산물의 변형과 관련되어 있을 것으로 예상되며, ChoP와 유사성을 보이는 나머지 4개의 CYP는 스테로이드 계열 물질의 하이드록실레이션과 밀접한 연관이 있을 것으로 추정된다.

A degenerate set of PCR primers based on two conserved regions (heme binding region and oxygen ligand pocket) were designed and successfully applied to amplify DNA fragments of cytochrome P450 hydroxylase (CYP) genes from a rare actinomycetes, S. benihana. The PCR amplified products were employed as a DNA probe to clone the entire CYP genes from S. benihana genomic library. Five different CYP-positive cosmids were isolated by colony hybridization as well as PCR confirmation. The complete nucleotide sequencing of five different CYP genes revealed that each unique CYP showed a significant amino acid homology to previously-known CYP genes involved in streptomycetes secondary metabolism. In addition, four CYP genes (CYP502, CYP503, CYP504, CYP506) were found to be linked to ferredoxin genes in the chromosome, and the CYP503 gene showed the high degree of amino acid similarity to the previously well-characterized CYP105 family in streptomycetes.

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참고문헌

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