Abstract
Determination of the complete genome sequence of the methanogen Methanosarcina acetivorans reveals unusual metabolic versatility
Highlights
An estimated 900 million tonnes of methane are produced annually by biological systems
M. acetivorans contains approximately 200 genes involved in methanogenesis, the only energy-generating process known so far in methanogenic bacteria
Its function in M. acetivorans is not yet known, it is possible that cytochrome d oxidase may act as a protection against oxygen by removing it and lowering the cellular concentration
Summary
An estimated 900 million tonnes of methane are produced annually by biological systems. The genome of M. acetivorans is 5,751,492 bp in size and has a G+C content of 42.7%. 4,524 potential protein-encoding genes were identified, with an average size of approximately 936 bp per gene. 69% had significant similarity either to known proteins or to conserved hypothetical proteins, and 31% had no similarity to any database sequences.
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