Detection and characterization of IS256, and insertion sequence in Staphylococcus aureus

B. R. Lyon, M. T. Gillespie, R. A. Skurray

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Abstract

Resistance to the aminoglycosides gentamicin (Gm(r)), tobramycin (Tm(r)) and kanamycin (Km(r)) in strains of Staphylococcus aureus isolated in Australia is mediated by the transposon Tn4001. The 1.35 kb inverted repeat of this transposon exhibits many of the characteristics of an insertion sequence and has consequently been designated IS256. Tandem duplication of IS256 contiguous with Tn4001 results in an increase in the level of Gm(r)Tm(r)Km(r), thereby implying that the element possesses strong promoter sequences. Both contiguous and independent insertions of IS256 into the staphylococcal chromosome have been observed, the latter suggesting that the element may play a role in molecular rearrangements of the genome.

Original languageEnglish
Pages (from-to)3031-3038
Number of pages8
JournalJournal of General Microbiology
Volume133
Issue number11
Publication statusPublished - 1 Dec 1987

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