%0 Journal Article %A Godfroy, Anne %A Lesongeur, FrançOise %A RaguéNèS, GéRard %A QuéRellou, JoëL %A Antoine, Elisabeth %A Meunier, Jean-Roch %A Guezennec, Jean %A Barbier, Georges %T Thermococcus hydrothermalis sp. nov., a New Hyperthermophilic Archaeon Isolated from a Deep-Sea Hydrothermal Vent %D 1997 %J International Journal of Systematic and Evolutionary Microbiology, %V 47 %N 3 %P 622-626 %@ 1466-5034 %R https://doi.org/10.1099/00207713-47-3-622 %I Microbiology Society, %X Abstract An extremely thermophilic archaeon, strain AL662T, was isolated from a deep-sea hydrothermal vent located on the East Pacific Rise at a latitude of 21°N. This strain is a strictly anaerobic coccus, and its cells range from 0.8 to 2 p.m in diameter. The optimum temperature, pH, and Sea Salt concentration for growth are 85°C, 6, and 20 to 40 g/liter, respectively. Strain AL662T grows preferentially on proteolysis products, on a mixture of 20 amino acids, and on maltose in the presence of elemental sulfur. The membrane lipids consist of di- and tetraether glycerol lipids. The DNA G+C content is 58 mol%. Sequencing of the 16S rRNA gene showed that strain AL662T belongs to the genus Thermococcus. On the basis of hybridization results, we propose that this strain should be placed in a new species, Thermococcus hydrothermalis. %U https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-47-3-622