Isolation and structure of cecropins, inducible antibacterial peptides, from the silkworm, Bombyx mori.
1. Cecropins, inducible antibacterial peptides, were purified by simple two step chromatography from immunized larval hemolymph of the silkworm, Bombyx mori. 2. The cecropins were further separated into four major and two minor forms by reverse-phase HPLC. 3. The four major cecropins were sequenced and divided into two types, A and B, whose structures were quite similar to cecropins A and B of Hyalophora cecropia. 4. Three of them contained an unusual amino acid, delta-hydroxylysine. 5. No remarkable difference in antibacterial activity against E. coli was detected among these cecropins.
Laboratory of Metabolic Biochemistry, Faculty of Agriculture, Tottori University, Japan.
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I
Morishima
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Suginaka
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T
Ueno
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H
Hirano
D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D000890:Anti-Infective Agents / Q000302:isolation & purification; D012831:Bombyx / Q000032:analysis*; D004591:Electrophoresis, Polyacrylamide Gel; D006458:Hemolymph / Q000032:analysis; D007301:Insect Hormones / Q000302:isolation & purification / Q000494:pharmacology; D008969:Molecular Sequence Data; D010447:Peptide Hydrolases; D010455:Peptides / Q000302:isolation & purification / Q000494:pharmacology
D000596:Amino Acids; D000890:Anti-Infective Agents; D007301:Insect Hormones; D010455:Peptides; D010447:Peptide Hydrolases