Bacteria methane oxidation

Hydrogen Photosynthetic bacteria, methane oxidation A few years... 

Org. Cl (30-90% C02) CH4-f02 CH4 -f 304 - Methane oxidizing bacteria Methane oxidizing archaea... 

The lower than expected yields can be explained by the nature of methane oxidation to methanol in these bacteria. This reaction, catalysed by methane mono-oxygenase, is a net consumer of reducing equivalents (NADH), which would otherwise be directed to ATP generation and biosynthesis. In simple terms the oxidation of methane to methanol consumes energy, lowering the yield. 

Girguis PR, AE Cozen, EF Delong (2005) Growth and population dynamics of anaerobic methane-oxidizing archaea and sulfate-reducing bacteria in a continuous-flow reactor. Appl Environ Microbiol 71 3725-3733. 

Pancost RD, Damste JSS, de Lint S, van der Maarel MJEC, Gottschal JC, The Medinaut Shipboard Scientific Party (2000) Biomarker evidence for widespread anaerobic methane oxidation in mediterranean sediments by a consortium of methanogenic archaea and bacteria. Appl Environ Microbiol... 

J. A. M. De Bont (1976) Hydrogenase activity in nitrogen-fixing methane-oxidizing bacteria. Antonie Van Leeuwenhoek., 42 255-259... 

Oremland et al. [136] subsequently demonstrated that methane-oxidizing bacteria also had the capacity to co-oxidize methyl bromide by methane monooxygenase produced during the oxidation of methane to methanol. They also showed that methanotrophic soils that had a high capacity to oxidize methane degraded14C-labeled methyl bromide to 14C02. 

The tank will reach steady-state conditions when the concentration of methane-oxidizing bacteria, [B], has increased to a constant cell density dictated by a balance of their ability to grow on methane against their losses due to wash out and die off ... 

In a shallow aquifer, the oxidation of TCE and other chloroalkenes was compared under conditions of phenol or methane amendments (Hopkins, Semprini McCarty, 1993). The objective was to stimulate the growth and metabolism of bacteria comparable to P. cepacia G4 and M. trichosporium OB3b, respectively. It is possible, however, that the methane-stimulated bacteria expressed particulate (membrane-bound) methane monoxygenase, which is known to oxidize TCE much more slowly than sMMO (DiSpirito et al., 1992). Under the conditions used, the phenol stimulation led to greater removal of TCE and dichloroethylenes. Ammonia addition, thought to stimulate ammonia-oxidizing bacteria that oxidize TCE (Vanelli et al., 1990), showed the lowest extent of TCE oxidation in groundwater microcosm tests (Hopkins et al., 1993). 

Bacteria that oxidize methane or methanol (methylotrophs) employ a periplasmic methanol dehydrogenase that contains as a bound coenzyme, the pyrroloquinoline quinone designated PQQ or meth-oxatin (Eq. 15-51).442 I 1 1 This fluorescent ortfzo-quinone... 

Dalton, H. The Leeuwenhoek lecture 2000. The natural and unnatural history of methane-oxidizing bacteria. Phil. Trans. R. Soc. Lond. B Biol. Sci. 2005, 360(1458), 1207-1222. 

Methane-oxidizing bacteria, or methanotrophs, can play a central role in reducing CH4 emissions from estuaries, by converting CH4 into bacterial biomass or CO2 (Topp and Hanson, 1991). It has been estimated that methanotrophic bacteria in freshwater... 

Topp, E., and Hanson, R.S. (1991) Metabolism of a radiatively important trace gas by methane-oxidizing bacteria In Microbial Production and Consumption of Greenhouse Gases (Rogers, J.E., and Whitman, W.B., eds.), pp. 71-90, ASM Press, Washington, DC. 

Orphan, V. J., Hinrichs, K.-U., Ussier, W. Ill et al. (2001). Comparative analysis of methane oxidizing Archaea and sulfate-reducing bacteria in anoxic marine sediments. Applied and Environmental Microbiology, 67, 1922-34. 

Methanotrophic bacteria use methane as the sole source of carbon and energy employing MMO to catalyze the first step in the methane oxidation pathway leading ultimately to CO2. 

Coleman D. D., Risatti J. B., and Schoell M. (1981) Fractionation of carbon and hydrogen isotopes by methane-oxidizing bacteria. Geochim. Cosmochim. Acta 45, 1033-1037. 

Oremland R. S. and Culbertson C. W. (1992) Importance of methane oxidizing bacteria in the methane budget as revealed by the use of a specific inhibitor. Nature 356, 421-423. 

Reay D. S., RadajewsM S., Murrell J. C., McNamara N., and Nedwell D. B. (2001) Effects of land-use on the activity and diversity of methane oxidizing bacteria in forest soils. Soil Biol. Biochem. 33, 1613-1623. 

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