Genomic Islands in Sinorhizobium meliloti Rm1021, Nitrogen-Fixing Symbiont of Alfalfa
- 作者: Roumiantseva M.1, Muntyan V.1, Cherkasova M.1, Saksaganskaya A.1, Andronov E.1, Simarov B.1
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隶属关系:
- All-Russian Research Institute of Agricultural Microbiology
- 期: 卷 54, 编号 7 (2018)
- 页面: 759-769
- 栏目: Reviews and Theoretical Articles
- URL: https://journals.rcsi.science/1022-7954/article/view/189046
- DOI: https://doi.org/10.1134/S102279541807013X
- ID: 189046
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详细
In silico analysis of open reading frames of genomic islands of Sinorhizobium meliloti Rm1021 was performed. This strain is a typical representative of soil bacteria forming nitrogen-fixing symbiosis with legume host plants from the alfalfa cross-inoculation group. It was demonstrated that genomic islands had mosaic structure, in which blocks of functional genes, IS-elements and noncoding RNA alternated. Genomic islands contained as well the components of T4SS and T4CP systems, and lacked systems of conjugative mobilization of islands. It was concluded that two of the three islands could be the variants of reduced integrative conjugative elements, and the third island represented a reduced integrated conjugative transposon. Site-specific integration of islands occurred into a 15–31 bp sequence (depending on the island) localized at the 3′-end of the tRNA gene, which is then shifted rightward, while the remaining part of the tRNA gene is completed by a similar sequence that exists in the island. A suggestion on the existence of “speciesspecific insertion hotspots” for genomic islands of root nodule bacteria was put forward.
作者简介
M. Roumiantseva
All-Russian Research Institute of Agricultural Microbiology
编辑信件的主要联系方式.
Email: mroumiantseva@yandex.ru
俄罗斯联邦, St. Petersburg, Pushkin, 196608
V. Muntyan
All-Russian Research Institute of Agricultural Microbiology
Email: mroumiantseva@yandex.ru
俄罗斯联邦, St. Petersburg, Pushkin, 196608
M. Cherkasova
All-Russian Research Institute of Agricultural Microbiology
Email: mroumiantseva@yandex.ru
俄罗斯联邦, St. Petersburg, Pushkin, 196608
A. Saksaganskaya
All-Russian Research Institute of Agricultural Microbiology
Email: mroumiantseva@yandex.ru
俄罗斯联邦, St. Petersburg, Pushkin, 196608
E. Andronov
All-Russian Research Institute of Agricultural Microbiology
Email: mroumiantseva@yandex.ru
俄罗斯联邦, St. Petersburg, Pushkin, 196608
B. Simarov
All-Russian Research Institute of Agricultural Microbiology
Email: mroumiantseva@yandex.ru
俄罗斯联邦, St. Petersburg, Pushkin, 196608