Pre_GI Gene

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

NC_004061:146862 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.


This island contains ribosomal proteins or RNA related elements and may indicate a False Positive Prediction!

StartEndLengthCDS descriptionQuickGO ontologyBLASTP
1468621481601299survival protein SurA precursorQuickGO ontologyBLASTP
148228149052825dimethyladenosine transferaseQuickGO ontologyBLASTP
149082149903822bis5-nucleosyl-tetraphosphataseQuickGO ontologyBLASTP
149938150423486dihydrofolate reductaseQuickGO ontologyBLASTP
1505041537373234carbamoyl-phosphate synthase large chainQuickGO ontologyBLASTP
1537511549081158carbamoyl-phosphate synthase small subunitQuickGO ontologyBLASTP
155046155867822dihydrodipicolinate reductaseQuickGO ontologyBLASTP
155880156821942LytBQuickGO ontologyBLASTP
156895157365471lipoprotein signal peptidaseQuickGO ontologyBLASTP
1573621601782817isoleucyl-tRNA synthetaseQuickGO ontologyBLASTP
160207161145939riboflavin biosynthesis protein RibFQuickGO ontologyBLASTP
16130916157827030S ribosomal protein S20QuickGO ontologyBLASTP
1616351627711137DnaJ proteinQuickGO ontologyBLASTP
1628741647901917DnaK proteinQuickGO ontologyBLASTP
165160165540381NADH dehydrogenase I chain AQuickGO ontologyBLASTP
165598166269672NADH dehydrogenase beta subunitQuickGO ontologyBLASTP