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CurtobacteriumRANK: GenusTAXONOMY: Bacteria -> Terrabacteria group -> Actinobacteria -> Actinobacteria -> Micrococcales -> Microbacteriaceae -> Curtobacterium OVERVIEW: Short irregular rods (0.3–0.6 × 0.5–3.0 µm); pleomorphism is not distinctive. Cells become shorter to coccoid in older cultures. Branching is not found, bending type cell division. Nonsporeforming. Not all species are motile; generally motile species show peritrichous flagellation. Gram-stain-positive, but staining properties can be lost with age. Non-acid-fast. Colonies are generally ivory, yellow, or orange. Strictly aerobic chemoorganotrophs. Acid is produced weakly from glucose, fructose, and some other carbohydrates. Acetate, pyruvate, and lactate are assimilated in addition to other organic acids. Catalase and DNase-positive; gelatin and esculin are hydrolyzed. Nitrate is not reduced; urease is not produced. The cell-wall peptiodoglycan, based on the presence of d-ornithine, is type B2β. Acetyl is the peptidoglycan acyl type. Mycolic acids are not found. Nonhydroxylated fatty acids, specifically anteiso-methyl branched chains fatty acids predominate; ω-cyclohexyl undecanoic acid is found in some species. Phosphatidylglycerol, diphosphatidylglycerol, and some glycosyldiacylglycerols are the major polar lipids. Spermidine and spermine are the major polyamines; putrescine and cadaverine are absent. Isoprenoid quinones, comprising menaquinones with 9 isoprene units (MK-9), predominate. DNA G+C content (mol%): 65.8–75.2 (Tm). Type species: Curtobacterium citreum This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072]
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