Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Freeze-drying feces reduces illumina-derived artefacts on 16S rRNA-based microbial community analysis

Illumina를 이용한16S rRNA 기반 미생물생태분석에서 분변의 동결건조에 의한 인공적인 시퀀스 생성 감소효과

  • Kim, Jungman (Faculty of Biotechnology, College of Applied Life Science, SARI, Jeju National University) ;
  • Unno, Tatsuya (Faculty of Biotechnology, College of Applied Life Science, SARI, Jeju National University)
  • Received : 2016.06.29
  • Accepted : 2016.07.25
  • Published : 2016.12.31
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Abstract

When used for amplicon sequencing, Illumina platforms produce more than hundreds of sequence artefacts, which affects operational taxonomic units based analyses such as differential abundance and network analyses. Nevertheless it has become a major tool for fecal microbial community analysis. In addition, results from sequence-based fecal microbial community analysis vary depending on conditions of samples (i.e., freshness, time of storage and quantity). We investigated if freeze-drying samples could improve quality of sequence data. Our results showed reduced number of possible artefacts while maintaining overall microbial community structure. Therefore, freeze-drying feces prior to DNA extraction is recommended for Illumina-based microbial community analysis.

PCR 산물을 이용한 시퀀싱방법 중 Illumina 플랫폼으로 시퀀싱을 수행하면 100개 이상의 인위적인 시퀀스가 생겨나며, 그러한 인위적으로 형성되는 시퀀스에 의해 Operational taxonomic units를 기반으로 한 미생물생태 변화 및 네트워크 분석에 영향을 미친다. 이러한 문제점이 있음에도 불구하고 분변미생물생태를 분석하는데 Illumina에서 제공하고 있는 시퀀싱을 주된 방법으로 사용하고 있으며, 또한 그러한 시퀀스 기반의 분변미생물 생태분석 결과는 분변샘플상태(i.e., 분변 보관 기간, 분변양, 분변의 신선도)에 따라 상이하게 나타난다. 본 연구에서는 분변샘플의 동결건조가 시퀀스 데이터의 퀄리티를 향상시키는지 관해 조사하였으며, 이를 통해 분변샘플에 동결건조처리는 전체적인 미생물생태구조를 변화시키지는 않지만 인위적으로 형성되었을 가능성이 있는 시퀀스의 수를 감소시키는 것으로 확인되었다. 따라서, 분변으로부터 DNA를 추출하기 이전에 동결건조처리하는 방법을 Illumina 기반의 분변미생물생태분석에 사용하는 것을 권장한다.

Keywords

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