Mycoplasma bovis shares insertion sequences with Mycoplasma agalactiae and Mycoplasma mycoides subsp. mycoides SC: Evolutionary and developmental aspects

Thomas, Anne; Linden, Annick; Mainil, Jacques; Bischof, Daniela F.; Frey, Joachim; Vilei, Edy M. (2005). Mycoplasma bovis shares insertion sequences with Mycoplasma agalactiae and Mycoplasma mycoides subsp. mycoides SC: Evolutionary and developmental aspects. FEMS microbiology letters, 245(2), pp. 249-255. Elsevier 10.1016/j.femsle.2005.03.013

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Three new insertion elements, ISMbov1, ISMbov2 and ISMbov3, which are closely related to ISMag1 (Mycoplasma agalactiae), ISMmy1 and IS1634 (both Mycoplasma mycoides subsp. mycoides SC), respectively, have been discovered in Mycoplasma bovis, an important pathogen of cattle. Southern blotting showed that the genome of M. bovis harbours 6–12 copies of ISMbov1, 11–15 copies of ISMbov2 and 4–10 copies of ISMbov3, depending on the strain. A fourth insertion element, the IS30-like element, is present in 4–8 copies. This high number of IS elements in M. bovis, which represent a substantial part of its genome, and their relatedness with IS elements of both M. agalactiae and M. mycoides subsp. mycoides SC suggest the occurrence of two evolutionary events: (i) a divergent evolution into M. agalactiae and M. bovis upon infection of different hosts; (ii) a horizontal transfer of IS elements during co-infection with M. mycoides subsp. mycoides SC and M. bovis of a same bovine host.

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