미생물학회지 (Korean Journal of Microbiology)

  • 제37권2호
  • /
  • Pages.137-144
  • /
  • 2001
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  • 0440-2413(pISSN)
  • /
  • 2383-9902(eISSN)
한국미생물학회 (The Microbiological Society of Korea)
권호 표지

16S rRNA 유전자 분석에 의한 전남 순천만 갯벌의 세균 다양성

Bacterial Diversity in the Mud Flat of Sunchon Bay, Chunnam Provice, by 16S rRNA Gene Analysis

  • 이명숙 (한국생명공학연구원 유전자은행, 충북대학교 미생물학과) ;
  • 홍순규 (한국생명공학연구원 유전자은행) ;
  • 이동훈 (김치경충북대학교 미생물학과) ;
  • 배경숙 (한국생명공학연구원 유전자은행)
  • 발행 : 2001.06.01
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초록

순천만 갯벌의 세균 군집의 다양성을 조사하기 위해 16S rDNA의 다양성을 조사하였다. 갯벌로부터 전체 핵산을 분리한 후, 세균에 상보적인 universal primer로 증폭된 16S rDNA로부터 클론 라이브러리를 만들었다. 총 111개의 클론으로부터 HaeIII를 이용하여 amplified rDNA restriction analysis (ARDRA)를 수행하고, Gelcompar II 프로그램을 이용하여 pattern을 clustering하였다. 111개의 클론 중 100가지의 서로 다른 RFLP type이 조사되었고, 이들 중 전체 클론 라이브러리를 대표할 수 있는 20개의 클론을 선별하여 부분적인 염기서열을 분석하여 세균 다양성을 분석하였다. 20개의 클론중에는 RDP와 GenBank에서 제공하는 small subunit RNA database와 동일한 클론은 존재하지 않았으며, 이미 알려진 배양 가능한 세균의 16S rRNA 염기서열과 비교 하였을때 77∼96.8%의 유사도를 보였다. 또한 이들 20개의 클론은 alpha-, delta-, gamma-Proteobacteria, low G+C Gram positive bacteria, high G+C Gram positive bacteria, Sphingobacteria (Cytophaga); Cyanobacteria (Chloroplast)등 주요한 7개 lineage에 속했으며, 클론들 중 Proteobacteria가 우점종을 차지하고 있었다.

In order to investigate the diversity of bacterial community in the mud flat of Sunchon Bay, Chunnam province, diversity of amplified 16S rDNA was examined. Total DNA was extracted from sediment soils and 16S rDNAs were amplified using PCR primers based on the universally conserved sequences in bacteria. Clonal libraries were constructed and 111 clones were examined by amplified rDNA restriction analysis (ARDRA) using HaeIII. Clones were clustered based on restriction patterns using computer program, GelCompar II. One hundred different RFLP types were detected from 111 clones. The 20 clones were selected and sequenced according to dendrograms derived from ARDRA, to cover most of the bacterial diversity in the clone libraries. None of the clones were identical to any representatives in the Ribosomal Database Project small subunit RNA databases and GenBank. All sequences showed between 77 and 96.8% similarity to the known 16s rRNA sequence from cultured organisms. The 20 clones sequenced fell into seven major lineages of the domain Bacteria: alpha-, delta-, gamma-Proteobacteria, low G+C Gram positive bacteria, high G+C Gram positive bacteria, Sphingobacteria (Cytophaga) and Cyanobacteria (chloroplast). Among the clones, the Proteobacteria were dominant.

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