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MicrobisporaRANK: GenusTAXONOMY: Bacteria -> Terrabacteria group -> Actinobacteria -> Actinobacteria -> Streptosporangiales -> Streptosporangiaceae -> Microbispora OVERVIEW: Aerobic, Gram-stain-positive, non-acid–alcohol-fast, nonmotile, mesophilic, and thermophilic actinobacteria which form stable, highly branched substrate and aerial mycelia. Spore chains, typically containing two spores, are borne longitudinally on short aerial hyphae. Spores are slightly oval to cylindrical (1.0–1.4 to 1.2–1.7 μm in diameter) and have smooth surfaces. Mesophilic species grow from 20–37°C, with thermophilic species up to 55°C. Most species require B vitamins, particularly thiamine, for growth. Chemoorganotrophic with an oxidative type of metabolism. Cell walls contain N-acetylated muramic acid and major amounts of meso-diaminopimelic acid; peptidoglycan type is A1γ. Whole-cell hydrolysates contain madurose and complex mixtures of saturated, unsaturated, iso-, anteiso-, and branched chain fatty acids. Predominant menaquinones have nine isoprene units with hydrogenation at positions III and IV [MK-9(III, IV-H4), MK-9(H2), and MK-9(H0)]. Major phospholipids are phosphatidylcholine and unknown glucosamine-containing compounds, but no phosphatidylglycerol. Natural habitat is soil, plant litter, and as epiphytes and endophytes of plants. DNA G+C content (mol%): 68–73. Type species: Microbispora rosea |