ArticleApplied and environmental microbiology2013
Genomic and physiological characterization of the chromate-reducing, aquifer-derived Firmicute Pelosinus sp. strain HCF1.
Article in Applied and environmental microbiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
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30 citing papers in PubMed, 66 citations in OpenAlex.
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- Calculibacillus koreensis gen. nov., sp. nov., an anaerobic Fe(III)-reducing bacterium isolated from sediment of mine tailings.Journal of microbiology (Seoul, Korea) · 2016Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Pelosinus spp. are fermentative firmicutes that were recently reported to be prominent members of microbial communities at contaminated subsurface sites in multiple locations. Here we report metabolic characteristics and their putative genetic basis in Pelosinus sp. strain HCF1, an isolate that predominated anaerobic, Cr(VI)-reducing columns constructed with aquifer sediment. Strain HCF1 ferments lactate to propionate and acetate (the methylmalonyl-coenzyme A [CoA] pathway was identified in the genome), and its genome encodes two [NiFe]- and four [FeFe]-hydrogenases for H(2) cycling. The reduction of Cr(VI) and Fe(III) may be catalyzed by a flavoprotein with 42 to 51% sequence identity to both ChrR and FerB. This bacterium has unexpected capabilities and gene content associated with reduction of nitrogen oxides, including dissimilatory reduction of nitrate to ammonium (two copies of NrfH and NrfA were identified along with NarGHI) and a nitric oxide reductase (NorCB). In this strain, either H(2) or lactate can act as a sole electron donor for nitrate, Cr(VI), and Fe(III) reduction. Transcriptional studies demonstrated differential expression of hydrogenases and nitrate and nitrite reductases. Overall, the unexpected metabolic capabilities and gene content reported here broaden our perspective on what biogeochemical and ecological roles this species might play as a prominent member of microbial communities in subsurface environments.
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