2018
DOI: 10.1038/s41598-018-25146-9
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Lignite coal burning seam in the remote Altai Mountains harbors a hydrogen-driven thermophilic microbial community

Abstract: Thermal ecosystems associated with underground coal combustion sites are rare and less studied than geothermal features. Here we analysed microbial communities of near-surface ground layer and bituminous substance in an open quarry heated by subsurface coal fire by metagenomic DNA sequencing. Taxonomic classification revealed dominance of only a few groups of Firmicutes. Near-complete genomes of three most abundant species, ‘Candidatus Carbobacillus altaicus’ AL32, Brockia lithotrophica AL31, and Hydrogenibaci… Show more

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Cited by 21 publications
(9 citation statements)
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References 45 publications
(60 reference statements)
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“…Phylogenetic analysis of Chr958 (NarAa) and Chr959 (NarAb) with other related proteins showed that they clustered with groups of subunits of aromatic‐ring‐hydroxylating dioxygenases. The large and small subunits exhibited moderate identity with their homologues in Candidatus Carbobacillus altaicus (Kadnikov et al ., 2018) and Rhodococcus species, and had lower identity (< 40%) to homologues in Pseudomonas sp. strains (Fig.…”
Section: Resultsmentioning
confidence: 97%
“…Phylogenetic analysis of Chr958 (NarAa) and Chr959 (NarAb) with other related proteins showed that they clustered with groups of subunits of aromatic‐ring‐hydroxylating dioxygenases. The large and small subunits exhibited moderate identity with their homologues in Candidatus Carbobacillus altaicus (Kadnikov et al ., 2018) and Rhodococcus species, and had lower identity (< 40%) to homologues in Pseudomonas sp. strains (Fig.…”
Section: Resultsmentioning
confidence: 97%
“…Microbial community of the sample, AL54 (site 1), collected from the same site 1 in 2 years after sampling AL36 (site 1), was dominated by Candidatus Carbobacillus (29.6%), facultatively anaerobic heterotrophs that can use molecular hydrogen as an energy source ( Kadnikov et al, 2018 ). However, most of Firmicutes (33% altogether) belonged to uncultured lineages phylogenetically distant form cultured groups and could not be classified even at the order level.…”
Section: Resultsmentioning
confidence: 99%
“…We previously described a low-diversity microbial community dominated by Firmicutes (recently renamed Bacillota ) associated with the burning lignite seams of the Taldy-Dyurgunskoye coalfield in the Altai Mountains ( Kadnikov et al, 2018 ). Presumably, the thermophilic Firmicutes spores could have spread from their original thermal habitats by air and colonize burning coal seams rich in high-energy substrates such as H 2 and CO.…”
Section: Introductionmentioning
confidence: 99%
“…Until February 2022, literature retrieval was conducted through the Web of Science database, and the published papers ,, of “coal” and “microbial communities” were retrieved. The fastQ files according to the accession numbers of the 16S rRNA gene data from coal samples were downloaded.…”
Section: Methodsmentioning
confidence: 99%