Thermococcus atlanticus sp. nov., a hyperthermophilic Archaeon isolated from a deep-sea hydrothermal vent in the Mid-Atlantic Ridge - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Extremophiles Année : 2003

Thermococcus atlanticus sp. nov., a hyperthermophilic Archaeon isolated from a deep-sea hydrothermal vent in the Mid-Atlantic Ridge

Résumé

An extremely thermophilic archaeon, strain MA898, was isolated from a deep-sea hydrothermal vent on the Mid-Atlantic Ridge. This strain is a strictly anaerobic coccus of approximately 0.7-1.2 micro m in diameter. Optimal temperature, pH, and NaCl concentration for growth are around 85 degrees C, pH 7, and 3%, respectively. Strain MA898 grows preferentially in the presence of elemental sulfur, polysulfur, cystine, or L-cysteine. The microorganism requires rich proteinaceous substrates. BHI-S medium supports rapid growth, with a final concentration of more than 1.2x10(9) cells ml(-1), but strain MA898 exhibits poor growth on 2216S medium (yeast/peptone) and poor growth on starch. Growth is inhibited by rifampicin and chloramphenicol at a concentration of 100 micro g/ml. The DNA G+C content is 50 mol%. Sequencing of the 16S rRNA gene indicates that strain MA898 belongs to the Thermococcusgenus, and from DNA/DNA hybridization data it is proposed as a new species: Thermococcus atlanticus. The deposition numbers are CIP-107420T and DSM15226.

Dates et versions

hal-01154267 , version 1 (21-05-2015)

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Marie-Anne Cambon-Bonavita, Françoise Lesongeur, Patricia Pignet, Nathalie Wery, Christophe Lambert, et al.. Thermococcus atlanticus sp. nov., a hyperthermophilic Archaeon isolated from a deep-sea hydrothermal vent in the Mid-Atlantic Ridge. Extremophiles, 2003, 7, pp.101-109. ⟨10.1007/s00792-002-0301-8⟩. ⟨hal-01154267⟩
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