Query: NC_002607:1868371 Halobacterium sp. NRC-1, complete genome
Lineage: Halobacterium; Halobacterium; Halobacteriaceae; Halobacteriales; Euryarchaeota; Archaea
General Information: Chemoheterotrophic obligate extreme halophilic archeon. This microbe (strain ATCC 700922) is an obligately halophilic archeon that has adapted to growth under conditions of extremely high salinity. Motility is via tufts of polar flagella and intracellular gas vesicles are used for buoyancy. This organism grow aerobically and its ease of culturing combined with the availability of established methods of genetic manipulation in the laboratory make it an ideal model organism for study of the archaea.
Subject: NC_005877:284829 Picrophilus torridus DSM 9790, complete genome
Lineage: Picrophilus torridus; Picrophilus; Picrophilaceae; Thermoplasmatales; Euryarchaeota; Archaea
General Information: This organism is a thermoacidophile, and can grow at temperatures around 60C and in environments where the pH drops to 0. The name reflects the area where the organism was isolated, which was a hot dry soil in Kawayu, in northern Japan, that was solfataric (volcanic area that gives off sulfur). The genome also encodes a large number of proton-driven secondary transporters which represents another adaptation to the acid environment. This organism expresses a surface layer (S-layer) that consists of a semicrystalline array of proteins outside the cell membrane.