Query: NC_014724:439594 Lactobacillus amylovorus GRL 1112 chromosome, complete genome Lineage: Lactobacillus amylovorus; Lactobacillus; Lactobacillaceae; Lactobacillales; Firmicutes; Bacteria General Information: Lactobacillus amylovorus GRL 1112 strain has been isolated from porcine faeces. This strain is also of interest as a putative probiotic. Lactobacillus amylovorus is a common member of the normal gastrointestinal tract microbiota in pigs, and specific strains have been suggested as potential probiotics. In addition, Lactobacillus amylovorus has also been isolated from plant material.
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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.