본 연구에서는 클로닝과 생어 염기서열 분석으로 획득된 16S rRNA 유전자 염기서열을 메타분석하여 반려견 분변 박테리아를 조사하였다. 이러한 메타분석을 위해서 RDP 데이터베이스(Release 11, Update 3)에 등록되어 있는 반려견 분변 박테리아 유래 16S rRNA 유전자 염기서열 검색하여 획득하였다. RDP 데이터베이스에서 총 420개의 반려견 분변 박테리아 유래 16S rRNA 유전자 염기서열이 확인되었고, 그 중에서 42개 유전자 염기서열이 배양가능한 박테리아에서 유래한 것으로 확인되었다. 이러한 420개의 유전자 염기서열은 박테리아 분류학상의 '문'(phylum)에서 총 5개(Firmicutes, Bacteroidetes, Actinobacteria, Fusobacteria, Proteobacteria)로 분류되었다. 그 중에서 Firmicutes가 가장 우점하는 '문'이었고, 총 420개 유전자 중에서 55.2%를 차지하였다. Bacteroidetes는 32.1%로 두 번째로 우점하는 '문'이였고, 다음으로 Actinobacteria(6.4%), Fusobacteria(3.8%), Proteobacteria(2.4%)가 우점하였다. 박테리아 분류학상의 '속'(genus)에서는 Bacteroidetes의 하위 단계인 Bacteroides가 가장 우점하였고 총 420개 유전자 중에서 30.0%를 차지하였다. 반면에 Firmicutes의 하위 단계인 Clostridium XI는 두 번째로 우점하는 '속'으로 총 420개 유전자 중에서 27.4%를 차지하였다. 추정상의 '종'(species)인 Operational taxonomic units의 수는 82개로 확인되었다. 본 연구의 결과는 반려견 분변 내 미생물 다양성을 이해하는데 도움을 줄 수 있을 것이고, 향후 반려견의 건강과 웰빙에 관한 연구에 활용될 수 있을 것이다.
본 연구에서는 클로닝과 생어 염기서열 분석으로 획득된 16S rRNA 유전자 염기서열을 메타분석하여 반려견 분변 박테리아를 조사하였다. 이러한 메타분석을 위해서 RDP 데이터베이스(Release 11, Update 3)에 등록되어 있는 반려견 분변 박테리아 유래 16S rRNA 유전자 염기서열 검색하여 획득하였다. RDP 데이터베이스에서 총 420개의 반려견 분변 박테리아 유래 16S rRNA 유전자 염기서열이 확인되었고, 그 중에서 42개 유전자 염기서열이 배양가능한 박테리아에서 유래한 것으로 확인되었다. 이러한 420개의 유전자 염기서열은 박테리아 분류학상의 '문'(phylum)에서 총 5개(Firmicutes, Bacteroidetes, Actinobacteria, Fusobacteria, Proteobacteria)로 분류되었다. 그 중에서 Firmicutes가 가장 우점하는 '문'이었고, 총 420개 유전자 중에서 55.2%를 차지하였다. Bacteroidetes는 32.1%로 두 번째로 우점하는 '문'이였고, 다음으로 Actinobacteria(6.4%), Fusobacteria(3.8%), Proteobacteria(2.4%)가 우점하였다. 박테리아 분류학상의 '속'(genus)에서는 Bacteroidetes의 하위 단계인 Bacteroides가 가장 우점하였고 총 420개 유전자 중에서 30.0%를 차지하였다. 반면에 Firmicutes의 하위 단계인 Clostridium XI는 두 번째로 우점하는 '속'으로 총 420개 유전자 중에서 27.4%를 차지하였다. 추정상의 '종'(species)인 Operational taxonomic units의 수는 82개로 확인되었다. 본 연구의 결과는 반려견 분변 내 미생물 다양성을 이해하는데 도움을 줄 수 있을 것이고, 향후 반려견의 건강과 웰빙에 관한 연구에 활용될 수 있을 것이다.
In this study, a meta-analysis of fecal bacteria in dogs was conducted using 16S rRNA gene sequences that have been recovered from cloning and Sanger sequencing. For this meta-analysis, we retrieved all 16S rRNA gene sequences recovered from fecal bacteria in dogs in the RDP database (Release 11, Up...
In this study, a meta-analysis of fecal bacteria in dogs was conducted using 16S rRNA gene sequences that have been recovered from cloning and Sanger sequencing. For this meta-analysis, we retrieved all 16S rRNA gene sequences recovered from fecal bacteria in dogs in the RDP database (Release 11, Update 3). A total of 420 sequences were identified from the RDP database, 42 of which were also recovered from cultured isolates. The 420 sequences were assigned to five phyla, of which Firmicutes was the most predominant phylum, accounting for 55.2% of all 420 sequences. Bacteroidetes was the second most predominant phylum, accounting for 32.1% of the 420 sequences, followed by Actinobacteria (6.4%), Fusobacteria (3.8%), and Proteobacteria (2.4%). The genus Bacteroides within Bacteroidetes was the largest, representing 30.0% of all 420 sequences, while the putative genus Clostridium XI within Firmicutes was the second largest, representing 27.4% of all 420 sequences. A total of 82 operational taxonomic units (OTUs) that are putative species were identified from the retrieved sequences. The results of this study will improve understanding of the diversity of fecal bacteria in dogs and guide future studies on the health and well-being of dogs.
In this study, a meta-analysis of fecal bacteria in dogs was conducted using 16S rRNA gene sequences that have been recovered from cloning and Sanger sequencing. For this meta-analysis, we retrieved all 16S rRNA gene sequences recovered from fecal bacteria in dogs in the RDP database (Release 11, Update 3). A total of 420 sequences were identified from the RDP database, 42 of which were also recovered from cultured isolates. The 420 sequences were assigned to five phyla, of which Firmicutes was the most predominant phylum, accounting for 55.2% of all 420 sequences. Bacteroidetes was the second most predominant phylum, accounting for 32.1% of the 420 sequences, followed by Actinobacteria (6.4%), Fusobacteria (3.8%), and Proteobacteria (2.4%). The genus Bacteroides within Bacteroidetes was the largest, representing 30.0% of all 420 sequences, while the putative genus Clostridium XI within Firmicutes was the second largest, representing 27.4% of all 420 sequences. A total of 82 operational taxonomic units (OTUs) that are putative species were identified from the retrieved sequences. The results of this study will improve understanding of the diversity of fecal bacteria in dogs and guide future studies on the health and well-being of dogs.
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문제 정의
This study presents a collective view of the fecal bacterial diversity in dogs using 16S rRNA gene sequences obtained by Sanger sequencing. The 5 phyla that are Firmicutes, Bacteroidetes, Actinobacteria, Fusobacteria and Proteobacteria appeared to be ubiquitous in dog feces irrespective of diets that greatly affect the composition of fecal bacterial communities in dogs.
제안 방법
In this study, we first performed a meta-analysis to provide a collective census of the fecal bacterial communities of dogs using 16S rRNA gene sequences obtained by Sanger sequencing from various studies.
이론/모형
A taxonomic tree with Bergey’s taxonomy was constructed using the program ARB[14].
성능/효과
A total of 420 sequences based on Sanger sequencing technology were obtained from six published and three unpublished studies. The 420 sequences including 28 isolate sequences were classified into five phyla, of which Firmicutes was the predominant phylum and accounted for 232 of the 420 sequences, followed by Bacteroidetes (135 sequences), Actinobacteria (27 sequences), Fusobacteria (16 sequences), and Proteobacteria (10 sequences) [Table 1]. These five taxa appear to be core phyla commonly found in dog feces[16].
The phylum Actinobacteria was represented by 27 sequences that were assigned to the genera Bifidobacterium (seven sequences), Collinsella (17 sequences), and Slackia (three sequences) [Fig 2]. Slackia included a sequence recovered from an asaccharolytic Slackia faecicanis isolate[24] [Fig 3].
The phylum Firmicutes was represented by 12 genera, of which putative Clostridium XI was the largest genus, represented by 115 sequences including 11 isolate sequences [Fig 2 and 3]. The 115 Clostridium XI sequences clustered into 10 OTUs, of which three included sequence(s) recovered from Clostridium isolates.
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