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| Allioux, Maxime; Yvenou, Steven; Slobodkina, Galina; Slobodkin, Alexander; Shao, Zongze; Jebbar, Mohamed; Alain, Karine. |
| Marine hydrothermal systems are characterized by a pronounced biogeochemical sulfur cycle with the participation of sulfur-oxidizing, sulfate-reducing and sulfur-disproportionating microorganisms. The diversity and metabolism of sulfur disproportionators are studied to a much lesser extent compared with other microbial groups. Dissulfurirhabdus thermomarina SH388T is an anaerobic thermophilic bacterium isolated from a shallow sea hydrothermal vent. D. thermomarina is an obligate chemolithoautotroph able to grow by the disproportionation of sulfite and elemental sulfur. Here, we present the results of the sequencing and analysis of the high-quality draft genome of strain SH388T. The genome consists of a one circular chromosome of 2,461,642 base pairs, has a... |
| Tipo: Text |
Palavras-chave: Genome annotation; Dissulfurirhabdus; Shallow sea hydrothermal vents; Inorganic sulfur compound disproportionation. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00651/76270/77245.pdf |
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| Slobodkin, Alexander; Slobodkina, Galina; Allioux, Maxime; Alain, Karine; Jebbar, Mohamed; Shadrin, Valerian; Kublanov, Ilya; Toshchakov, Stepan; Bonch-osmolovskaya, Elizaveta. |
| nformation on the biochemical pathways of carbon and energy metabolism in representatives of the deep lineage bacterial phylum Deferribacteres are scarce. Here, we report the results of the sequencing and analysis of the high-quality draft genome of the thermophilic chemolithoautotrophic anaerobe Deferribacter autotrophicus. Genomic data suggest that CO2 assimilation is carried out by recently proposed reversible tricarboxylic acid cycle (“roTCA cycle”). The predicted genomic ability of D. autotrophicus to grow due to the oxidation of carbon monoxide was experimentally proven. CO oxidation was coupled with the reduction of nitrate to ammonium. Utilization of CO most likely involves anaerobic [Ni, Fe]-containing CO dehydrogenase. This is the first evidence... |
| Tipo: Text |
Palavras-chave: Autotrophic; Thermophile; RoTCA cycle; CO oxidation; Fe(III)-reduction; Nitrate reduction. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00589/70078/68051.pdf |
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| Cozannet, Marc; Borrel, Guillaume; Roussel, Erwan; Moalic, Yann; Allioux, Maxime; Sanvoisin, Amandine; Toffin, Laurent; Alain, Karine. |
| Members of the archaeal order Methanomassiliicoccales are methanogens mainly associated with animal digestive tracts. However, environmental members remain poorly characterized as no representatives not associated with a host have been cultivated so far. In this study, metabarcoding screening combined with quantitative PCR analyses on a collection of diverse non-host-associated environmental samples revealed that Methanomassiliicoccales were very scarce in most terrestrial and aquatic ecosystems. Relative abundance of Methanomassiliicoccales and substrates/products of methanogenesis were monitored during incubation of environmental slurries. A sediment slurry enriched in Methanomassiliicoccales was obtained from a freshwater sample. It allowed the... |
| Tipo: Text |
Palavras-chave: Methanomassiliicoccales; Cultivation; Methyl-compounds; Environmental cluster; Networks. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00665/77716/79808.pdf |
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