Query: NC_009515:510121 Methanobrevibacter smithii ATCC 35061, complete genome Lineage: Methanobrevibacter smithii; Methanobrevibacter; Methanobacteriaceae; Methanobacteriales; Euryarchaeota; Archaea General Information: Methanobrevibacter smithii ATCC 35061 (DSM 861) (strain PS) was isolated from a sewage digester in Gainesville, Florida, USA. Sewage digester isolate. Human gut methanogen. Methanobrevibacter smithii can be isolated from anoxic environments such as anaerobic digesters, anaerobic soil and sediment, and the gastrointestinal tracts of humans, ruminants and other animals. This organism is the dominant archaeal symbiont found in the human gut.
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General Information: Nitrogen fixation. Thermophilic strictly anaerobic bacterium oxidizing acetate to CO2 in syntrophic association with a methanogenic partner. Capable of growing with various substrates such as alcohols and methylated nitrogen compounds, and to reduce sulfate in the presence of acetate. Isolated from sludge of an anaerobic digester run at 58 degrees C. Thermacetogenium phaeum is a strictly anaerobic, homoacetogenic bacterium. It is exceptional because it can use the homoacetogenic Wood-Ljungdahl (CO- dehydrogenase) pathway both for acetate formation and acetate oxidation. Acetate oxidation is possible only in syntrophic cooperation with a methanogenic partner which maintains a low hydrogen and/or formate concentration in the coculture. With this, the bacterium operates close to the thermodynamic equilibrium of substrate conversion, similar to other syntrophically fermenting bacteria such as Syntrophomonas wolfei the genomes of which have been sequenced as well in the recent past.