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1Laboratoire de Biotechnologie, Département Environnement Profond, IFREMER, Centre de Brest, 29280 Plouzané, France
2Unité des Entérobactéries, Institut Pasteur, 75724 Paris cedex 15, France
* Corresponding author. Mailing address: Laboratoire de Caractérisation des Microorganismes Marins, DRV/VP, IFREMER, Centre de Brest, BP70, 29280 Plouzané, France.
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 µ in diameter. The optimum temperature, pH, and Sea Salt concentration for growth are 85°C, 6, and 20 to 40 g/liter, respectively. Strain AL662Tgrows 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 AL662Tbelongs to the genus Thermococcus. On the basis of hybridization results, we propose that this strain should be placed in a new species, Thermococcus hydrothermalis.
Present address:L'OREAL, Recherche Avancée, DCSP, Phototoxicité, 93600 Aulnay-sous-Bois, France. This article has been cited by other articles:
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