Pre_GI: SWBIT SVG BLASTN

Query: NC_004061:31500 Buchnera aphidicola str. Sg (Schizaphis graminum), complete genome

Lineage: Buchnera aphidicola; Buchnera; Enterobacteriaceae; Enterobacteriales; Proteobacteria; Bacteria

General Information: This strain is the symbiont of the aphid Schizaphis graminum and contains a large circular chromosome. Aphid endosymbiont. Almost all aphids contain maternally transmitted bacteriocyte cells, which themselves contain bacteria called Buchnera. The aphids live on a restricted diet (plant sap), rich in carbohydrates, but poor in nitrogenous or other essential compounds. It is believed that the Buchnera provide the essential nutrients the host lacks. Besides a nutritional co-dependence, due to a co-existence of millions of years, Buchnera have lost the ability to produce cell surface components such as lipopolysaccharides. This makes for an obligate endosymbiont relationship between host and Buchnera. Buchnera are prokaryotic cells which belong to the gamma-Proteobacteria, closely related to the Enterobacteriaceae family. Phylogenetic studies using 16S rRNA indicate that the symbiotic relationship was established around 200-250 million years ago. Since Buchnera are closely related to Escherichia coli and Haemophilus influenzae, comparative genomic studies can shed light on the evolutionary mechanisms of intracellular endosymbiosis as well as the different underlying molecular basis between organisms with parasitic behavior and symbionts.

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BLASTN Alignment.txt

Subject: NC_008599:1291300 Campylobacter fetus subsp. fetus 82-40, complete genome

Lineage: Campylobacter fetus; Campylobacter; Campylobacteraceae; Campylobacterales; Proteobacteria; Bacteria

General Information: This strain (82-40) was isolated from the blood of a human patient who was having a renal transplant and is the best characterized isolate of this species.. The ratio of bloodstream infection to diarrheal illnesses for C. fetus is nearly 400-fold higher than for C. jejuni, indicating its marked propensity for invasive disease compared to C. jejuni. Causes infertility, infectious abortions in cattle, opportunistic human pathogen. This organism causes infertlity and infectious abortions in domesticated sheep, goats and cattle. It is an opportunistic pathogen in humans which can severely affect immunocompromised patients. Initially the bacterium can cause gastroenteritis, and then spread systemically throughout the blood (bacteremia) and cause septicemia, meningitis, and other systemic infections. This layer is essential for host colonization, and prevents complemented-mediated immune responses by inhibiting complement C3b binding.