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- Methanococcoides burtonii is a methylotrophic methanogenic archaeon first isolated from Ace Lake, Antarctica. Its type strain is DSM 6242. M. burtonii is an extremophilic archeon of the family Methanosarcinaceae, a family of three genera of coccus-shaped cells. Methanococcides burtonii has adapted to life in Antarctica where it resides in Ace Lake at temperatures that remain permanently 1-2 °C. M. burtonii was first discovered by an Austrian limnologist named Harry Burton. It was determined that the optimal temperature of growth was 23 °C. M. burtonii is able to grow on methylated substrates and tolerates a broad range of growth temperatures (< 4° to 29 °C). The cold adaptation in M. burtonii involves specific changes in membrane lipid unsaturation and flexible proteins. M. burtonii are irregular cocci, ranging 0. to 1.8 micrometers in diameter. M. burtonii occur singly or in pairs. During Gram staining, cells lyse and they also lyse in hypotonic solutions. M. burtonii are motile with a single flagellum, and lack storage structures and internal membranes in the cytoplasm. M. burtonii are colony-forming archaea, usually occurring in <1 millimeter colonies that are circular and convex. Cells of M. burtonii fluoresce blue when exposed to UV illumination. The optimal initial pH for growth is 7.7. Two substances found to stimulate growth are yeast extract and trypticase soy agar. M. burtonii cells were found to be resistant to penicillin, ampicillin, tetracycline, vancomycin and erythromycin. Although it has evolved the ability to sustain itself in what are considered "extremophilic" environments for archaea (1-2 °C), M. burtonii optimally grows at 23 °C. M. burtonii is an obligately methylotrophic methanogen able to use methylamines and methanol, but not formate, H2CO2, or acetate for growth. Methane is a greenhouse gas, and methanogens play a critical role in global warming and the global carbon cycle via the production of methane. (en)
- Methanococcoides burtonii est une espèce d'archées méthanogènes de la famille des Methanosarcinaceae. Elle a été découverte au fond du , en Antarctique, en milieu anoxique (privé d'oxygène), où la température avoisine 0,6 °C, et a été nommée en l'honneur de , un limnologiste qui a découvert la présence de méthane dans le lac Ace. (fr)
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- Methanococcoides burtonii est une espèce d'archées méthanogènes de la famille des Methanosarcinaceae. Elle a été découverte au fond du , en Antarctique, en milieu anoxique (privé d'oxygène), où la température avoisine 0,6 °C, et a été nommée en l'honneur de , un limnologiste qui a découvert la présence de méthane dans le lac Ace. (fr)
- Methanococcoides burtonii is a methylotrophic methanogenic archaeon first isolated from Ace Lake, Antarctica. Its type strain is DSM 6242. M. burtonii is an extremophilic archeon of the family Methanosarcinaceae, a family of three genera of coccus-shaped cells. Methanococcides burtonii has adapted to life in Antarctica where it resides in Ace Lake at temperatures that remain permanently 1-2 °C. M. burtonii was first discovered by an Austrian limnologist named Harry Burton. It was determined that the optimal temperature of growth was 23 °C. M. burtonii is able to grow on methylated substrates and tolerates a broad range of growth temperatures (< 4° to 29 °C). The cold adaptation in M. burtonii involves specific changes in membrane lipid unsaturation and flexible proteins. M. burtonii are ir (en)
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