Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Development of an Efficient Procedure for the Construction of Metagenomic Library from Environment Samples

효율적인 Metagenomic Library의 제작 방법 탐구

  • Lim Dongbin (Department of Bioinformatics and Life Science, Soongsil University)
  • 임동빈 (숭실대학교 자연과학대학 생명정보학과)
  • Published : 2004.12.01
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Abstract

I investigated an effective way to generate a metagenomic library from DNA prepared from environental samples. The sizes of DNA extracted from environmental samples were usually in the range of 10 to 100 kbp as estimated from $0.4\%$ agarose gel electrophoresis. Because of this small size, a fosmid, rather than BAC, was chosen as a vector. It was found that, for the successful generation of metagenomic library, the selection of DNA with the sized of about 40 kbp was critical and, therefore, a simple agarose gel electrophoresis system was developed to select this size of DNA. By the procedure described in this report, I obtained metagenomic libraries containing 25,000 fosmid clones, which corresponded to 1,000 Mb of metagenomic DNA.

자연계에 존재하는 미생물의 대부분이 배양이 불가능하다는 것이 밝혀진 이후, 자연계의 시료로부터 직접 유전자를 클로닝하여 유용유전자를 발굴하는 메타제놈(metagenome) 이용 방법이 주목을 받게 되었다. 그러나 실제로 오염이 심한 환경시료로부터 DNA를 추출하여 유용한 메타제놈 라이브러리(metagenomic library)를 제작하기란 쉽지 않은 일이다. 따라서 본 연구에서는 실제 메타제놈 라이브러리를 제작할 때 만나는 기술적 문제점에 대한 해결 방법을 탐구하였다. 메타제놈 라이브러리 제작에는 fosmid vector가 가장 편리하였으며, 성공적인 라이브러리제작에는 fosmid vector에 클로닝이 가능한 40 kbp 크기의 DNA 조각을 얻는 과정이 중요함을 알았다. 여러 실험 조건을 종합적으로 검사한 후 메타제놈 라이브러리 제작에 대한 최적 방법을 제사하였다.

Keywords

References

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