Query: NC_013798:345339 Streptococcus gallolyticus UCN34, complete genome Lineage: Streptococcus gallolyticus; Streptococcus; Streptococcaceae; Lactobacillales; Firmicutes; Bacteria General Information: Isolated from a human case of endocarditis associated with colon cancer in Caen, France in 2001. Streptococci are non-motile, Gram-positive cocci with widely varying pathogenic potential that occur in pairs or chains. Streptococcus gallolyticus (strain UCN34, biotype I) is a commensal Gram-positive bacterium isolated from various habitats, including feces of many animals and from human clinical sources. S. gallolyticus is part of the rumen flora but also a cause of disease in ruminants as well as in birds (septicemia in pigeons, outbreaks in broiler flocks, or bovine mastitis). This is a tannin-degrading Streptococcus species. Strains have been isolated from various habitats, including feces of many animals and from human clinical sources. This organism can be a cause of infectious endocarditis.
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General Information: This biovar nodulates legumes in the Tribe Viciae (Vicia, Pisum, Lathyrus, Lens). This strain is a spontaneous streptomycin-resistant mutant of strain 300. Nitrogen-fixing plant symbiont. This organism, like other Rhizobia, establishes a symbiotic relationship with a legume plant, providing nitrogen in exchange for a protected environment. The legume roots secrete flavonoids and isoflavonoids which the bacteria recognize and use to turn on genes involved in root nodulation. Many of the root nodulation genes are involved in synthesis and secretion of a nodule inducing signal, a lipochito-oligosaccharide molecule, which the plant recognizes, triggering nodule formation. The bacterium is endocytosed and exists inside a membrane bound organelle, the symbiosome, and fixes nitrogen for the plant cell while the host cell provides carbon compounds for the bacterium to grow on. The nitrogen fixation is important as it obviates the need for expensive and environmentally damaging fertilizer use.