Query: NC_011768:1718869 Desulfatibacillum alkenivorans AK-01, complete genome Lineage: Desulfatibacillum alkenivorans; Desulfatibacillum; Desulfobacteraceae; Desulfobacterales; Proteobacteria; Bacteria General Information: Desulfatibacillum alkenivorans AK-01 was isolated from sediment from the Arthur Kill, NJ/NY waterway, USA. This site has a history of contamination from petrochemical industry and strain AK-01 is able to degrade 13 to 18 carbon alkanes. Desulfatibacillum alkenivorans is an alkene-degrading, sulfate-reducing bacterium isolated from estuarine sediment. It activates alkanes via subterminal addition of the alkane to fumarate.
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General Information: This strain is found in the pea aphid, Acyrthosiphon pisum.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.