Draft genome sequence of Methanobrevibacter smithii strain B181, isolated from a fecal sample.

A mesophilic methanogen, Methanobrevibacter smithii B181 (DSM 11975) was previously isolated from a human fecal sample, grown on carbon dioxide and hydrogen, and subsequently sequenced. The reconstructed 1.9-Mb genome sequence of Methanobrevibacter smithii B181 contributes to our understanding of hydrogenotrophic, CO 2 -reducing methanogenesis in the human gut.