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Genomic insight into the predominance of candidate phylum atribacteria JS1 lineage in marine sediments

Cited 10 time in Web of Science Cited 10 time in Scopus
Authors
Lee, Yung Mi; Hwang, Kyuin; Lee, Jae Il; Kim, Mincheol; Hwang, Chung Yeon; Noh, Hyun-Ju; Choi, Hakkyum; Lee, Hong Kum; Chun, Jongsik; Hong, Soon Gyu; Shin, Seung Chul
Issue Date
2018-11
Citation
Frontiers in Microbiology, Vol.9, p. 2909
Keywords
candidate divisionAtribacteriaJS1single-cell genomicsAntarcticaRoss Seamarine sediment
Abstract
Candidate phylum Atribacteria JS1 lineage is one of the predominant bacterial groups in anoxic subseafloor sediments, especially in organic-rich or gas hydrate-containing sediments. However, due to the lack of axenic culture representatives, metabolic potential and biogeochemical roles of this phylum have remained elusive. Here, we examined the microbial communities of marine sediments of the Ross Sea, Antarctica, and found candidate phylum Atribacteria JS1 lineage was the most abundant candidate phylum accounting for 9.8-40.8% of the bacterial communities with a single dominant operational taxonomic unit (OTU). To elucidate the metabolic potential and ecological function of this species, we applied a single-cell genomic approach and obtained 18 single-cell amplified genomes presumably from a single species that was consistent with the dominant OTU throughout the sediments. The composite genome constructed by co-assembly showed the highest genome completeness among available Atribacteria JS1 genomes. Metabolic reconstruction suggested fermentative potential using various substrates and syntrophic acetate oxidation coupled with hydrogen or formate scavenging methanogens. This metabolic potential supports the predominance of Atribacteria JS1 in anoxic environments expanding our knowledge of the ecological function of this uncultivated group.
ISSN
1664-302X
URI
https://hdl.handle.net/10371/165728
DOI
https://doi.org/10.3389/fmicb.2018.02909
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College of Natural Sciences (자연과학대학)Dept. of Biological Sciences (생명과학부)Journal Papers (저널논문_생명과학부)
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