title: K-582, a new peptide antibiotic. I.
abstract: A new basic peptide antibiotic designated as K-582 was isolated, purified and characterized. When K-582 was applied to a column of Al2O3 or Biol-Gel P-2 or CM Sephadex, two major peaks which were named Fraction I (K-582 A) and Fraction II (K-582 B) were obtained. The nitrogen content, the behavior in color reaction, the absorption bands of amide linkages in the infrared absorption spectrum, 1H NMR spectrum and C-13 NMR spectrum indicated the peptide nature of K-582 A and K-582 B. K-582 was effective against yeasts, but inactive against other Gram-positive bacteria, Gram-negative bacteria and Mycobacterium. The toxicity was low in mice.
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000302:isolation & purification*; D023181:Antimicrobial Cationic Peptides; D051379:Mice; D008826:Microbial Sensitivity Tests; D003904:Mitosporic Fungi / Q000378:metabolism; D009374:Neoplasms, Experimental / Q000188:drug therapy; D010455:Peptides / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents; D023181:Antimicrobial Cationic Peptides; D010455:Peptides; C026530:myroridin K