Query: NC_010175:3287500 Chloroflexus aurantiacus J-10-fl, complete genome
Lineage: Chloroflexus aurantiacus; Chloroflexus; Chloroflexaceae; Chloroflexales; Chloroflexi; Bacteria
General Information: Chloroflexus aurantiacus J-10-fl (DSM 635) was isolated from the Hakone hot spring area in Japan. This organism is one of the deepest branching phototrophs, and has some characteristics of both green non-sulfur and purple photosynthetic bacteria. These thermophiles live in hot springs of neutral to high pH and grow in mats, typically as the lowest layer in the mat with cyanobacteria above them, or as filamentous tendrils. The bacterium grows as a photoheterotroph and consumes the organic products the cyanobacteria produce, although it can also be photoautotrophic under anaerobic conditions and chemoorganotrophic under aerobic conditions. Like other green sulfur bacteria, the light-harvesting apparatus exists in chlorosomes, which consists of reaction centers surround by a protein-stabilized glycolipid monolayer, at the inner surface of the cytoplasmic membrane, although the reaction centers are more similar to the type II systems found in cyanobacteria than the type I systems found in green-sulfur bacteria. The multicellular filaments this organism produces are capable of gliding motility.
Subject: NC_003888:4031299 Streptomyces coelicolor A3(2), complete genome
Lineage: Streptomyces coelicolor; Streptomyces; Streptomycetaceae; Actinomycetales; Actinobacteria; Bacteria
General Information: Well-studied antiobiotic-producing bacterium. These bacteria are widely distributed in nature, especially in the soil. The characteristic earthy smell of freshly plowed soil is actually attributed to the aromatic terpenoid geosmin produced by species of Streptomyces. There are currently 364 known species of this genus, many of which are the most important industrial producers of antibiotics and other secondary metabolites of antibacterial, antifungal, antiviral, and antitumor nature, as well as immunosuppressants, antihypercholesterolemics, etc. Streptomycetes are crucial in the soil environment because their diverse metabolism allows them to degrade the insoluble remains of other organisms, including recalcitrant compounds such as lignocelluloses and chitin. Streptomycetes produce both substrate and aerial mycelium. The latter shows characteristic modes of branching, and in the course of the streptomycete complex life cycle, these hyphae are partly transformed into chains of spores, which are often called conidia or arthrospores. An important feature in Streptomyces is the presence of type-I peptidoglycan in the cell walls that contains characteristic interpeptide glycine bridges. Another remarkable trait of streptomycetes is that they contain very large (~8 million base pairs which is about twice the size of most bacterial genomes) linear chromosomes with distinct telomeres. These rearrangements consist of the deletion of several hundred kilobases, often associated with the amplification of an adjacent sequence, and lead to metabolic diversity within the Streptomyces group. Sequencing of several strains of Streptomyces is aimed partly on understanding the mechanisms involved in these diversification processes. This bacterium is a soil-dwelling filamentous organism responsible for producing more than half of the known natural antibiotics. It is a well-studied species of Streptomyces and genetically is the best known representative.