IS1675, a Novel Lactococcal Insertion Element, Forms a Transposon-Like Structure Including the Lacticin 481 Lantibiotic Operon

AUTOR(ES)

Dufour, Alain

FONTE

American Society for Microbiology

RESUMO

Two copies of IS1675, a novel lactococcal insertion element from the IS4 family, are present on a 70-kb plasmid, where they frame the lantibiotic lacticin 481 operon. The whole structure could be a composite transposon designated Tn5721. This study shows that the lacticin 481 operon does not include any regulatory gene and provides a new example of a transposon-associated bacteriocin determinant. We identified five other IS1675 copies not associated with the lacticin 481 operon. The conservation of IS1675 flanking sequences suggested a 24-bp target site.

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