Query: NC_016114:2612465 Streptomyces flavogriseus ATCC 33331 chromosome, complete genome
Lineage: Streptomyces pratensis; Streptomyces; Streptomycetaceae; Actinomycetales; Actinobacteria; Bacteria
General Information: Environment: Soil; Isolation: Soil; Temp: Mesophile. The genus Streptomyces consists of soil and water Gram positive filamentous bacteria well known for their ability to produce complex secondary metabolites including many antibiotics. Additionally they undergo complex multicellular development, with spores germinating to form a branched, multinucleoid substrate mycelium, which then produces an aerial mycelium which septates into uninucleoid spores. Streptomyces flavogriseus is an aerobic, Gram-positive bacterium isolated from soil. This organism produces cellulases and xyanases that are able to degrade cellulose and xylan.
Subject: NC_007333:537292 Thermobifida fusca YX, complete genome
Lineage: Thermobifida fusca; Thermobifida; Nocardiopsaceae; Actinomycetales; Actinobacteria; Bacteria
General Information: Produces thermostable enzymes. Members of this genus are distinguished from most actinomycetes by their ability to form clustered spores that attach directly to the substrate mycelia, and not to the aerial mycelia. Moreover, these bacteria do not produce aerial mycelia at all. M. fusca is the most thermophilic, with some growth detectable at up to 75 degrees C. The natural habitat of Thermobifida is self-heated organic materials, like rotting hay, compost, manure or urban waste piles, etc., which they share with other thermophilic and thermotolerant actinomycetes. Biological and physiological features of these bacteria are accordingly adapted to the conditions of such environments, namely the high temperatures and the presence of abundant plant materials and other bio-polymer substrates of natural origin. Actinomycetes are well suited for this environment because they generally grow as branching hyphae and are well adapted to penetration and degradation of insoluble substrates such as lignocellulose. Spores of Thermobifida are known to cause allergic respiratory diseases called mushroom worker disease and farmer's lung, which develop in agricultural workers who by the nature of their work happen to breathe in significant amounts of actinomycete spores from hay, compost, etc. Some isolates of this organism are able to mineralize plastic disposals and other anthropogenic xenobiotics. Thermobifidaare of particular interest because they produce multiple thermostable enzymes involved in the degradation of lignocellulose.