Recently it was reported that methanogens of the genus Methanobrevibacter exhibit catalase activity. This was surprising, since Methanobrevibacter species belong to the order Methanobacteriales, which are known not to contain cytochromes and to lack the ability to synthesize heme. We report here that Methanobrevibacter arboriphilus strains AZ and DH1 contained catalase activity only when the gr...

Here, the draft genome sequences of four different Methanobrevibacter species are presented. Three of the Methanobrevibacter species (M. curvatus, M. cuticularis, and M. filiformis) have been isolated from the termite hindgut, while M. oralis was isolated from human subgingival plaque.

We report the development of a high-throughput screening platform to identify inhibitors of the membrane-bound A1Ao-ATP synthase from the rumen methanogen Methanobrevibacter ruminantium M1. Inhibitors identified in the screen were tested against growing cultures of M. ruminantium, validating the approach to identify new inhibitors of methanogens.

The archaeon Methanobrevibacter smithii is a major colonizer of the human gut. Methanobrevibacter smithii strain KB11 was newly isolated from a Korean fecal sample. Here, we present the complete genome sequence of strain KB11 and a brief comparison with that of M. smithii type strain ATCC 35061T.

A methanogenic bacterium with the morphological and physiological properties of the genus Methanobrevibacter was isolated from the feces of a Japanese man who excreted methane in his breath. Indirect immunofluorescence staining revealed that the isolate had an antigenicity unrelated to that of any known members of the genus Methanobrevibacter.

A phylogenetic analysis of the sequences of 60 clones of archaeal small-subunit rRNA genes amplified from the termite Reticulitermes speratus revealed that most of them (56 clones) clustered in the genus Methanobrevibacter. Three clones were classified in the order Thermoplasmales. The Methanobrevibacter-related symbionts were detected by in situ hybridization analysis.

In previous studies, the abundance and diversity of methanogenic archaea in the dental microbiota have been analysed by the detection of specific DNA sequences by PCR-based investigations and metagenomic studies. Few data issued regarding methanogens actually living in dental plaque. We collected dental plaque specimens in 15 control individuals and 65 periodontitis patients. Dental plaque spec...

Although in nature most microorganisms are known to occur predominantly in consortia or biofilms, data on archaeal biofilm formation are in general scarce. Here, the ability of three methanoarchaeal strains, Methanobrevibacter smithii and Methanosphaera stadtmanae, which form part of the human gut microbiota, and the Methanosarcina mazei strain Gö1 to grow on different surfaces and form biofilm...