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Agrobacterium sp. H13-3, formerly known as Rhizobium lupini H13-3, is a soil bacterium that was isolated from the rhizosphere of Lupinus luteus. The isolate has been established as a model system for studying novel features of flagellum structure, motility and chemotaxis within the family Rhizobiaceae. The complete genome sequence of Agrobacterium sp. H13-3 has been established and the genome structure and phylogenetic assignment of the organism was analysed. For de novo sequencing of the Agrobacterium sp. H13-3 genome, a combined strategy comprising 454-pyrosequencing on the Genome Sequencer FLX platform and PCR-based amplicon sequencing for gap closure was applied. The finished genome consists of three replicons and comprises 5,573,770 bases. Based on phylogenetic analyses, the isolate could be assigned to the genus Agrobacterium biovar I and represents a genomic species …