Query: NC_008701:1582839 Pyrobaculum islandicum DSM 4184, complete genome
Lineage: Pyrobaculum islandicum; Pyrobaculum; Thermoproteaceae; Thermoproteales; Crenarchaeota; Archaea
General Information: Hyperthermophilic anaerobe. Pyrobaculum islandicum was isolated from water from a geothermal power plant in Iceland. This organism is able to grow lithotrophically and organotrophically using hydrogen or organic matter as the electron donors and sulfur, sulfite, and thiosulfate as electron acceptors.
Subject: NC_006177:3457637 Symbiobacterium thermophilum IAM 14863, complete genome
Lineage: Symbiobacterium thermophilum; Symbiobacterium; Shewanellaceae; Clostridiales; Firmicutes; Bacteria
General Information: This symbiotic and thermophilic bacterium was discovered by screening for thermostable tryptanophases in Japanese compost. Cultured growth of this organism requires the presence of another bacterial species, such as a Bacillus or Escherichia coli, which provides diffusable metabolites required for its growth. Pure cultures can be obtained by growing Symbiobacterium thermophilum in a bioreactor, separated from its symbiotic counterpart by a dialysis membrane. Because of its symbiotic nature, it cannot be cultured with conventional methods. Despite a negative reaction for gram stain, this species is placed with the gram-positive bacteria based on 16s phylogenetic analysis.