Query: NC_016111:3736254 Streptomyces cattleya NRRL 8057, complete genome Lineage: Streptomyces cattleya; Streptomyces; Streptomycetaceae; Actinomycetales; Actinobacteria; Bacteria General Information: Streptomyces cattleya, a producer of the antibiotics thienamycin and cephamycin C, is one of the rare bacteria known to synthesize fluorinated metabolites. Gram-positive bacterium originally isolated from soil. The bacterium Streptomyces cattleya has become an organism of interest due to its ability to produce various antibiotics (thienamycin, cephamycin C, penicillin N) and to excrete the fluorinated antibiotic 4-fluorothreonine when cultivated in the presence of fluorine.
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General Information: This strain is found in the cedar aphid, Cinara cedri. 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.