Pre_GI: SWBIT SVG BLASTN

Query: NC_017256:144854 Buchnera aphidicola str. Ak (Acyrthosiphon kondoi) chromosome,

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

General Information: 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.

Subject: NC_009901:1309724 Shewanella pealeana ATCC 700345, complete genome

Lineage: Shewanella pealeana; Shewanella; Shewanellaceae; Alteromonadales; Proteobacteria; Bacteria

General Information: This species was isolated from a microbial community colonizing the accessory nidamental gland of the squid Loligo peali (Atlantic squid) for their capacity to respire on sulfur. It was placed in the Shewanella genus based on physiological and biochemical characteristics and 16S rRNA sequence analysis. Shewanella are ubiquitous in marine environment and play very important role in global carbon and nitrogen cycle. The present strain is moderately halophilic, requiring sodium ions for growth. Shewanella are facultatively anaerobic, Gram-negative bacteria, motile by polar flagella, rod-like, and generally associated with aquatic or marine environments.