title: [Antibacterial peptides (XX). Synthesis and antibacterial activity of alpha-acyltetrapeptides containing basic amino acids (IX)].
abstract: In order to compare the antibacterial activity with Acyl-Lys-Lys(Thr)-Glu-OH (I), already reported, 3 kinds of Acyl-Lys-Lys(Glu)-Thr-OH (9a - c) and corresponding tetrapeptide (10), which were exchanged Thr for Glu on I, were synthesized by dicyclohexylcarbodiimide method. It was proved the (+)-6-methyloctanoyl-Lys-Lys(Glu)-Thr-OH (9a) shows antibacterial activity against 5 kinds of Gram-negative bacteria and against 2 kinds of Gram-positive bacteria, but that the others (9b), (9c), only have the weak one, and that tetrapeptide has against Gram-positive bacteria; and that those compounds have almost the same one as Acyl-Lys-Lys(Thr)-Glu-OH (I) has.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000900:Anti-Bacterial Agents / Q000032:analysis / Q000138:chemical synthesis* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects*; D004352:Drug Resistance, Microbial; D009842:Oligopeptides / Q000138:chemical synthesis* / Q000494:pharmacology; D010455:Peptides / Q000032:analysis / Q000138:chemical synthesis / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D000596:Amino Acids; D000900:Anti-Bacterial Agents; D009842:Oligopeptides; D010455:Peptides