Abstract
Transposon Tn916 was conjugally transferred from Enterococcus faecalis to Bacillus licheniformis bacterial strains ATCC 10716 and ATCC 9945A by filter and broth matings. The Tn916 transfer frequencies to B. licheniformis ranged from 10-7 to 10-5 selecting for tetracycline-resistant (Tcr) transconjugants depending on broth or filter mating. Movement of Tn916 was demonstrated when TcrB. licheniformis transconjugants were mated with Bacillus subtilis strain W23. Tn916 insertion caused several auxotrophic and bacitracin deficient mutants. Southern blot analyses of Hin dIII chromosomal digests extracted from Tcr transconjugants showed that the transposon inserted at different sites in the B. licheniformis chromosome and the copy number of Tn916 varied. This approach should be useful for genetic studies of B. licheniformis.
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