Genomic Reconstruction of an Uncultured Hydrothermal Vent Gammaproteobacterial Methanotroph (Family Methylothermaceae) Indicates Multiple Adaptations to Oxygen Limitation

Frontiers in Microbiology
Connor T SkennertonVictoria J Orphan

Abstract

Hydrothermal vents are an important contributor to marine biogeochemistry, producing large volumes of reduced fluids, gasses, and metals and housing unique, productive microbial and animal communities fueled by chemosynthesis. Methane is a common constituent of hydrothermal vent fluid and is frequently consumed at vent sites by methanotrophic bacteria that serve to control escape of this greenhouse gas into the atmosphere. Despite their ecological and geochemical importance, little is known about the ecophysiology of uncultured hydrothermal vent-associated methanotrophic bacteria. Using metagenomic binning techniques, we recovered and analyzed a near-complete genome from a novel gammaproteobacterial methanotroph (B42) associated with a white smoker chimney in the Southern Lau basin. B42 was the dominant methanotroph in the community, at ∼80x coverage, with only four others detected in the metagenome, all on low coverage contigs (7x-12x). Phylogenetic placement of B42 showed it is a member of the Methylothermaceae, a family currently represented by only one sequenced genome. Metabolic inferences based on the presence of known pathways in the genome showed that B42 possesses a branched respiratory chain with A- and B-family heme ...Continue Reading

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Citations

Jun 7, 2017·The ISME Journal·Kirsten OswaldJana Milucka
Jan 29, 2019·Frontiers in Microbiology·Ling-Dong ShiHe-Ping Zhao
Jun 30, 2018·The ISME Journal·Caitlin M SingletonGene W Tyson
Jul 25, 2021·FEMS Microbiology Ecology·Xiyang DongYong Wang
Aug 25, 2021·International Journal of Systematic and Evolutionary Microbiology·Lingping ZhuangDan Chen

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Datasets Mentioned

BETA
2623620619

Software Mentioned

RAST
BLASTp
RAxML
ESOM
megahit
Muscle
checkM

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