title: Methanogenesis: surprising molecules, microorganisms and ecosystems.
abstract: Methanogenesis involves a novel set of coenzymes as one-carbon and electron carriers. Consequently, metabolic processes of methanogens deviate from those present in non-methanogenic bacteria. Methanogenic bacteria can be classified on the basis of substrate utilization. Group I (24 species) grows at the expense of hydrogen plus CO2 and/or formate and group II (7 species) uses methanol and/or acetate. Hydrogen-consuming methanogens are found as epi- or endosymbionts of anaerobic ciliates.
mesh_terms: D000085:Acetates / Q000378:metabolism; D000693:Anaerobiosis; D000818:Animals; D001419:Bacteria / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism; D055598:Chemical Phenomena; D002621:Chemistry; D003067:Coenzymes / Q000378:metabolism; D004579:Electron Transport; D056890:Eukaryota / Q000378:metabolism; D019605:Euryarchaeota / Q000378:metabolism; D005561:Formates / Q000378:metabolism; D006859:Hydrogen / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D000432:Methanol / Q000378:metabolism; D008854:Microscopy, Electron; D013045:Species Specificity; D013559:Symbiosis
chemical_list: D000085:Acetates; D003067:Coenzymes; D005561:Formates; C030544:formic acid; D002245:Carbon Dioxide; D006859:Hydrogen; D008697:Methane; D000432:Methanol