Query: NC_007426:205390 Natronomonas pharaonis DSM 2160, complete genome
Lineage: Natronomonas pharaonis; Natronomonas; Halobacteriaceae; Halobacteriales; Euryarchaeota; Archaea
General Information: Isolated from Lake Gabara in Egypt. Extreme haloalkaliphilic archeon. Natronomonas pharaonis is able to survive at high salt and pH conditions which results in limited nitrogen availability through ammonium. In order to compensate for this, Natronomonas pharaonis has developed three systems to promote nitrogen assimilation: direct uptake of ammonia, uptake of nitrate, and uptake of urea. Another problem with high pH environments is the use of a proton gradient for the generation of ATP, which other alkaliphiles have adapted to by substitution of sodium ions for protons. However, this organism utilizes protons for ATP generation as determined by experimental data.
Subject: NC_006624:2016000 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.