Peptide antibiotic inhibiting growth of Gram-positive bacteria. The mode of action appears to be disruption of cell walls and lysis of cells (By similarity). Maturation of thiazole and oxazole containing antibiotics involves the enzymatic condensation of a Cys, Ser or Thr with the alpha-carbonyl of the preceding amino acid to form a thioether or ether bond, then dehydration to form a double bond with the alpha-amino nitrogen. Thiazoline or oxazoline ring are dehydrogenated to form thiazole or oxazole rings. Plantazolicin A.