involvement of tn4430 in transfer of bacillus anthracis plasmids mediated by bacillus thuringiensis plasmid pxo12.the self-transmissible plasmid pxo12 (112.5 kilobases [kb]), originally isolated from strain 4042a of bacillus thuringiensis subsp. thuringiensis, codes for production of the insecticidal crystal protein (cry+). the mechanism of pxo12-mediated plasmid transfer was investigated by monitoring the cotransfer of the tetracycline resistance plasmid pbc16 (4.2 kb) and the bacillus anthracis toxin and capsule plasmids, pxo1 (168 kb) and pxo2 (85.6 kb), respectively. in matings of b. anthracis donors wi ...19892536653
identification of self-transmissible plasmids in four bacillus thuringiensis subspecies.the transfer of plasmids by mating from four bacillus thuringiensis subspecies to bacillus anthracis and bacillus cereus recipients was monitored by selecting transcipients which acquired plasmid pbc16 (tcr). transcipients also inherited a specific large plasmid from each b. thuringiensis donor at a high frequency along with a random array of smaller plasmids. the large plasmids (ca. 50 to 120 megadaltons), pxo13, pxo14, pxo15, and pxo16, originating from b. thuringiensis subsp. morrisoni, b. th ...19873117773
[inter- and intraspecies conjugal transfer of different plasmids in bacilli].conjugal transfer of plasmid pub110 between different strains of bacilli was studied. the plasmid transfer was possible not only between various strains of b. subtilis, but also when many other species of bacilli served as recipients. conjugation of a donor strain b. subtilis 19 (p19pub110) was accompanied by a transfer of plasmid p19 along with plasmid pub110 to the b. subtilis recipient strains lacking a large plasmid p19. if, like the donor cells, the recipient b. subtilis strain carried plas ...200314515473
transfer of plasmid pbc16 between bacillus thuringiensis strains in non-susceptible larvae.plasmid transfer was investigated in larvae of insects of the orders coleoptera, diptera, and lepidoptera. the effects of introducing bacillus thuringiensis strains in live non-susceptible larvae, and in the presence of added insecticidal toxins to kill the larvae, were examined. plasmid transfer was not detected as the strains passed through non-susceptible live larvae, but was detected when the larvae were toxin-killed. the results indicate that growth of b. thuringiensis and plasmid transfer ...200219709226
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