Query: NC_015474:644552 Pyrococcus sp. NA2 chromosome, complete genome
Lineage: Pyrococcus; Pyrococcus; Thermococcaceae; Thermococcales; Euryarchaeota; Archaea
General Information: Pyrococcus has similar characteristics of other thermoautotrophican archaea such as Archaeoglobus, and Methanococcus in the respect that they are all thermophilic and anaerobic. Pyrococcus differs, however, because its optimal growth temperature is nearly 100 °C and dwells at a greater sea depth than the other archaea. Studying Pyrococcus helps give insight to possible mechanisms used to endure extreme environmental conditions like high temperatures and high pressure.
Subject: NC_007481:3167434 Pseudoalteromonas haloplanktis TAC125 chromosome I, complete
Lineage: Pseudoalteromonas haloplanktis; Pseudoalteromonas; Pseudoalteromonadaceae; Alteromonadales; Proteobacteria; Bacteria
General Information: This strain was isolated from a sample of coastal sea water near a French Antarctic station. This organism is adapted to growth at low temperatures and reactive oxygen species by a number of putative dioxygenases and fatty acid desaturases amongst other proteins. The organism can grow optimally in salt concentrations of 1.5 to 3.5% NaCl.The genome consists of 2 chromosomes, one of which may replicate unidirectionally. Some interesting features of this genome include the lack of the nucleoid-associated gene hns, a lack of genes involved in molybdopterin metabolism, a lack of the cAMP-CAP complex, and a lack of the PEP-dependent PTS system.