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Microbes Environ. 2013;28(2):275-8. Epub 2013 May 11.

Commonalities and differences among symbiosis islands of three Mesorhizobium loti strains.

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Department of Plant Genome Research, Kazusa DNA Research Institute, 2–6–7 Kazusa-kamatari Kisarazu, Chiba 292–0818, Japan.


To shed light on the breadth of the host range of Mesorhizobium loti strain NZP2037, we determined the sequence of the NZP2037 symbiosis island and compared it with those of strain MAFF303099 and R7A islands. The determined 533 kb sequence of NZP2037 symbiosis island, on which 504 genes were predicted, implied its integration into a phenylalanine-tRNA gene and subsequent genome rearrangement. Comparative analysis revealed that the core regions of the three symbiosis islands consisted of 165 genes. We also identified several NZP2037-specific genes with putative functions in nodulation-related events, suggesting that these genes contribute to broaden the host range of NZP2037.

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