Query: NC_012846:1741000 Bartonella grahamii as4aup, complete genome Lineage: Bartonella grahamii; Bartonella; Bartonellaceae; Rhizobiales; Proteobacteria; Bacteria General Information: Bartonella grahamii (strain as4aup) is Gram-negative bacterium isolated from a wood mouse (Apodemus sylvaticus) in central Sweden. Bartonella are human and animal pathogens which infect erythrocytes and can cause angiogenic lesions. These organisms cause diseases in humans such as Oroya fever, Trench fever, endocarditis, and Cat Scratch disease. Transmission of this organism is via the bite of a blood-sucking arthropod. Bartonella grahamii can be isolated from the blood of rodents and is found world wide. Fleas may be the transmission vector for Bartonella grahamii to other rodents. Human disease appears to be rare and associated with an immunocompromised state.
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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.