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AncylobacterRANK: GenusTAXONOMY: cellular organisms -> Bacteria -> Proteobacteria -> Alphaproteobacteria -> Rhizobiales -> Xanthobacteraceae -> Ancylobacter OVERVIEW: Curved rods, 0.3–1.0 × 1.0–3.0 µm. Rings (0.9–3.0 µm outer diameter) occasionally formed prior to cell separation. Coiled, helical, and filamentous forms are not produced. Cells are encapsulated. Resting stages not known. Some strains produce gas vacuoles. Gram negative. Generally nonmotile, but motility occurs in one gas vacuolate strain by means of a single polar flagellum. Obligately aerobic, possessing a strictly respiratory type of metabolism, with oxygen as the terminal electron acceptor. Optimal temperature, 22–37°C. Colonies are translucent to opaque and white to cream colored. Pellicles are produced in liquid media. Oxidase positive. Catalase positive. Chemoorganotrophic, using a variety of sugars or salts of organic acids as carbon sources. Chemolithotrophic growth has been reported on molecular hydrogen. Strains that have been tested can use methanol and formate (facultatively methylotrophic). Occur in soil and freshwater environments.The mol% G + C of the DNA is: 66–69 (Bd).Type species: Ancylobacter aquaticus This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072] |