Molecular characterization of methanotrophic isolates from freshwater lake sediment

Article Abstract:

Researchers have documented the existence of Methylomonas strains in Lake Washington, suggesting that these bacteria are more widespread than scientists have thought. The bacterium contained soluble methane mono-oxygenase and methane oxidation occurs predominantly in the top 0.8 cm of sediment.

Washington, Identification and classification, Lakes, Methanobacteriaceae, Methanogens

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nifH sequences and nitrogen fixation in type I and type II methanotrophs

Article Abstract:

Research has been conducted on the type I and type II methanotrophs, methane-oxidizing bacteria. Results indicate that both types of methanotrophs contain nitrogenase involved in nitrogen fixation and that nitrogenase genes from these methanotrophs may be present in different environments.

United States, Statistical Data Included, Analysis, Physiological aspects, Genetic aspects, Bacteria, Oxidation-reduction reaction, Oxidation-reduction reactions, Nitrogenase, Nitrogen, Microbiological research, Nitrogen fixation

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Role of multiple gene copies in particulate methane monooxygenase activity in the methane-oxidizing bacterium Methylococcus capsulatus Bath

Article Abstract:

A study was conducted to analyze the sequence of pmoCAB gene clusters and a third copy of pmoC from Methylococcus capsulatus. The phenotypes of insertion mutants produced in each gene were examined. Escherichia coli strains were utilized in the study. Experimental results indicated that the genes supported a critical function in wild-type particulate methane monooxygenase activity.

Research, Escherichia coli, Oxidases

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