Methanogens energy

Methanococcus vanmelli formate dehydrogenases, 663 Methanococcus voltae cation transport, 558 Methanogenic bacteria nickel, 644 Methanogens energy, 643 Methanol carbonylation... 

Methanogenic bacteria (archaea) Produce methane as an energy source (or utilise it as a carbon source later)... 

The two functional groups of microbes in the aquifer, the sulfate reducing bacteria and methanogens, are present initially in small amounts, just 10-6 mg kg-1, but their populations can grow as they derive energy by metabolizing the acetate. 

In addition to methanogens and some acetogens, bacteria capable of 1,2-propanediol fermentation have been reported to produce vitamin B12 [286]. The transformation of 1,2-propanediol (propylene glycol) to propionaldehyde requires vitamin B12. Further fermentation of propionaldehyde to n-propanol and propionic acid does not require vitamin B12 but yields energy for growth. 

In summary, methanophenazine (10) is the first phenazine whose involvement in the electron transport of biologic systems could be established. The experiments indicate that its role in the energy metabolism of methanogens corresponds to that of ubiquinones in mitochondria and bacteria. 

Hippier B, Thauer RK. 1999. The energy conserving methyltetrahydrometha-nopterin coenzyme M methyltransferase complex from methanogenic archaea function of the subunit MtrH. FEBS Lett 449 165-8. 

The anaerobic digestion of fatty acids, alcohols and organic compounds is accomplished by a syntrophy between H2-producing and H2-consuming methanogenic archaea [6] that favors the better use of the energy content of primary substrates [7]. 

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