Summary
The illegitimate recombination between Staphylococcus aureus plasmids pE194 (or pGG20, the hybrid between pE194 and Escherichia coli plasmid pBR322) and pBD17 (plasmid pUB110 without HpaII C-fragment) was studied in Bacillus subtilis. Cointegrates were generated with the frequency of 1–3x10-8. Among 22 hybrids analysed 9 types of recombinants were found. Nucleotide sequences of all three parental plasmids were involved in intermolecular recombination. Nucleotide sequencing of recombinant DNA junctions revealed that in 8 cases recombination occurred between short homologous regions (9–15 bp). One recombinant was formed using nonhomologous sites. The similarity was demonstrated between nucleotide sequences of the recombination sites of two types of cointegrates and those used for pE194 integration into the B. subtilis chromosome. Possible mechanisms of illegitimate recombination are discussed.
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Bashkirov, V.I., Stoilova-Disheva, M.M. & Prozorov, A.A. Interplasmidic illegitimate recombination in Bacillus subtilis . Mol Gen Genet 213, 465–470 (1988). https://doi.org/10.1007/BF00339617
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DOI: https://doi.org/10.1007/BF00339617