Lanthionine-containing peptide antibiotic (lantibiotic) active against S.michiganensis subspecies sepedonicus strain 2136 (MIC=30 pmol/ml). The bactericidal activity of lantibiotics is based on depolarization of energized bacterial cytoplasmic membranes, initiated by the formation of aqueous transmembrane pores. Maturation of lantibiotics involves the enzymatic conversion of Thr, and Ser into dehydrated AA and the formation of thioether bonds with cysteine. The 62-67 beta-methyllanthionine thioether bond is oxidized to a sulfoxide. This is followed by membrane translocation and cleavage of the modified precursor. Belongs to the type B lantibiotic family.