Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Identification of the Nitrifying Archaeal Phylotype Carrying Specific amoA Gene by Applying Digital PCR

디지털 PCR을 응용한 특정 amoA유전자를 가진 질산화 Archaea 동정

  • Park, Byoung-Jun (Department of Microbiology, Chungbuk National University) ;
  • Park, Soo-Je (Department of Microbiology, Chungbuk National University) ;
  • Rhee, Sung-Keun (Department of Microbiology, Chungbuk National University)
  • Published : 2007.09.30
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Abstract

Mesophilic Crenarchaeota have been known to be predominant among ammonia-oxidizing microorganisms in terrestrial and marine environments. In this study, we determined the archaeal phylotypes carrying specific amoA by combining digital PCR and multiplex-nested PCR. Analysis of samples in which amoA and 16S rRNA gene were amplified showed that amoA gene diversity was relatively higher than that of 16S rRNA gene. Nitrifying archaeal group I.1a was dominant over I.1b group of crenarchaota and euryarchaeota. This approach could be applied for interrelating a functional gene to a specific phylotype in natural environments.

해양 및 토양에서의 암모니아 산화는 세균에 비해 Crenarchaeota 그룹의 archaea에 의해 우세하게 일어나고 있음이 알려졌다. 서해 갯벌에서, 배양에 의존하지 알고, 특정 암모니아 산화유전자(amoA)를 가진 archaea을 동정하고자 디지털 PCR법을 응용한 nested PCR법을 개발하였다. amoA와 16S rRNA유전자가 동시에 증폭된 샘플의 분석결과, 16S rRNA유전자에 비해 amoA 유전자의 다양성 이 높았으며, I.1a 그룹의 crenarchaea가 I.1b 그룹의 crenarchaea보다 갯벌지역에서 암모니아 산화에 우점적으로 기여하고 있음을 알 수 있었다. 본 연구에서 시도된, 디지털 PCR과 multiplex-nested PCR을 접목한 접근법을 이용하면 특정 기능유전자를 가진 미생물을 환경에서 검증하는데 응용할 수 있을 것이다.

Keywords

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