Query: NC_006624:1952554 Thermococcus kodakarensis KOD1, complete genome
Lineage: Thermococcus kodakarensis; Thermococcus; Thermococcaceae; Thermococcales; Euryarchaeota; Archaea
General Information: This organism was originally identified as Pyrococcus sp. strain KOD1. It was isolated from a solfatara on Kodakara Island, Japan. Hyperthermophilic archeon. This genus is a member of the order Thermococcales in the Euryarchaeota. Thermococcus sp. are the most commonly isolated hyperthermophilic organisms and are often isolated from marine hydrothermal vents and terrestrial hot sulfur springs. Elemental sulfur is either required for, or stimulates, growth. These obligate heterotrophs can ferment a variety of organic compounds, including peptides, amino acids, and sugars in the absence of sulfur. Thermococcus kodakaraensis is a hyperthermophilic archeon. Proteins from this organism have been extensively studied to find thermostable enzymes for industrial and biotechnological applications.
Subject: NC_000917:1778173 Archaeoglobus fulgidus DSM 4304, complete genome
Lineage: Archaeoglobus fulgidus; Archaeoglobus; Archaeoglobaceae; Archaeoglobales; Euryarchaeota; Archaea
General Information: This is the type strain (DSM 4304) of the Archaeoglobales, and was isolated from a geothermally heated sea floor at Vulcano Island, Italy. Doubling time is four hours under optimal conditions. The organism is an autotrophic or organotrophic sulfate/sulfite respirer. An additional distinguishing characteristic is blue-green fluorescence at 420 nm. This bacterium is the first sulfur-metabolizing organism to have its genome sequence determined. Growth by sulfate reduction is restricted to relatively few groups of prokaryotes; all but one of these are Eubacteria, the exception being the archaeal sulfate reducers in the Archaeoglobales. These organisms are unique in that they are only distantly related to other bacterial sulfate reducers, and because they can grow at extremely high temperatures. The known Archaeoglobales are strict anaerobes, most of which are hyperthermophilic marine sulfate reducers found in hydrothermal environments. High-temperature sulfate reduction by Archaeoglobus species contributes to deep subsurface oil-well 'souring' by iron sulfide, which causes corrosion of iron and steel in oil-and gas-processing systems.