Pre_GI Gene

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Host: NC_004061 NEIGHBOURS BLASTN Download Island sequence Download Island gene sequence(s)

NC_004061:166375 Buchnera aphidicola str. Sg (Schizaphis graminum), complete genome

Host 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.

StartEndLengthCDS descriptionQuickGO ontologyBLASTP
1663751681681794NADH dehydrogenase I chain CDQuickGO ontologyBLASTP
168171168677507ATP synthase subunit EQuickGO ontologyBLASTP
1686741700171344NADH dehydrogenase I chain FQuickGO ontologyBLASTP
1700891728212733NADH dehydrogenase gamma subunitQuickGO ontologyBLASTP
172818173786969NADH dehydrogenase subunit HQuickGO ontologyBLASTP
173808174350543NADH dehydrogenase subunit IQuickGO ontologyBLASTP
174365174856492NADH dehydrogenase I chain JQuickGO ontologyBLASTP
174899175201303NADH dehydrogenase I chain KQuickGO ontologyBLASTP
1751981770451848NADH dehydrogenase I chain LQuickGO ontologyBLASTP
1771301786351506NADH dehydrogenase I chain MQuickGO ontologyBLASTP
1786671801271461NADH dehydrogenase I chain NQuickGO ontologyBLASTP
180194181126933hypothetical 358 kDa proteinQuickGO ontologyBLASTP
1812371824931257dihydrofolate synthaseQuickGO ontologyBLASTP
183061184008948ribose-phosphate pyrophosphokinaseQuickGO ontologyBLASTP
184078184956879isopentenyl monophosphate kinaseQuickGO ontologyBLASTP
1852881863731086peptide chain release factor 1QuickGO ontologyBLASTP
186370187197828HemKQuickGO ontologyBLASTP