| Methanobrevibacter |
| Morphology | Methanobrevibacter |
| CELLULAR |
| Staining | Gram-positive |
| Morphology | Oval rods or cocci to short rods, usually occurring in pairs or chains; about 0.5-0.7 um in width and 0.8-1.4 um in length.. |
| Motility | Nonmotile |
| Specialized structures | Nonsporing,. Cell walls are composed of pseudomurein |
| Division |
| COLONIAL |
| Solid surface |
| Liquid |
| Growth Parameters | Methanobrevibacter |
| PHYSIOLOGICAL |
| Tropism | |
| Oxygen | Very strict anaerobes |
| pH | |
| Temperature | Optimum temperature: 37-39`C; maximum: about 45`C; minimum: about 30`C. |
| Requirements | All use NH4+ as a major source of cell nitrogen. One or more B vitamins are required for growth. Acetate may be a major source of cell carbon |
| Products | |
| Enzymes | |
| Unique features | Energy for growth is
obtained by reduction of CO2 to CH4 by using H2 and
sometimes formate as the electron donor. Acetate, methanol, methylamines or other organic compounds are not used as electron donors for CH4 formation.. |
| ENVIRONMENTAL |
| Habitat | |
| Lifestyle | |
| Pathogenicity |
| Distribution |
| Genome | Methanobrevibacter |
| G+C Mol % | 27.5-31.6 (Bd) |
| Reference | Methanobrevibacter |
| First citation | Balch and Wolfe in Balch, W.E., C.E. Fox, L.J. Magrum, C. R. Woese and R.S. Wolfe. 1979 Methanogens: reevaluation of a unique biological group. Microbiol. Rev. 43: 260-296 |
| The Prokaryotes | |
| Bergey's Systematatic | p 2178 T.L. Miller |
| Bergey's Determinative | p 720 |
| References |