RT Journal Article SR Electronic(1) A1 Godfroy, Anne A1 Lesongeur, FrançOise A1 RaguéNèS, GéRard A1 QuéRellou, JoëL A1 Antoine, Elisabeth A1 Meunier, Jean-Roch A1 Guezennec, Jean A1 Barbier, GeorgesYR 1997 T1 Thermococcus hydrothermalis sp. nov., a New Hyperthermophilic Archaeon Isolated from a Deep-Sea Hydrothermal Vent JF International Journal of Systematic and Evolutionary Microbiology, VO 47 IS 3 SP 622 OP 626 DO https://doi.org/10.1099/00207713-47-3-622 PB Microbiology Society, SN 1466-5034, AB 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., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-47-3-622