Query: NC_016818:362548 Rahnella aquatilis CIP 78.65 = ATCC 33071 chromosome, complete Lineage: Rahnella aquatilis; Rahnella; Enterobacteriaceae; Enterobacteriales; Proteobacteria; Bacteria General Information: Environment: Host; Isolation: drinking water; Temp: Mesophile; Isolation:drinking water. Rahnella aquatilis is a facultatively anaerobic, nitrogen-fixing, gram-negative rod from the Enterobacteriaceae family. It is usually found in fresh water. It is sometimes found in human clinical specimens.
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General Information: This organism was first isolated from the soil in Vineland, New Jersey, although it is found worldwide. It is a large obligate aerobe that has one of the highest respiratory rates of any organism. Azotobacter vinelandii also produces a number of unusual nitrogenases which allow it to fix atmospheric nitrogen to ammonia, a compound it can then use as a nitrogen source. It protects the oxygen-sensitive nitrogenase enzymes through its high respiratory rate, which sequesters the nitrogenase complexes in an anoxic environment. This organism has a number of unusual characteristics. Under extreme environmental conditions, the cell will produce a cyst that is resistant to dessication and is surrounded by two capsular polysaccharide layers. This organism produces two industrially important polysaccharides, poly-beta-hydroxybutyrate (PHB) and alginate. PHB is a thermoplastic biopolymer, and alginate is used in the food industry. Alginate is also used by the pathogen Pseudomonas aeruginosa to infect the lungs of cystic fibrosis patients.