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Cramp Analog Having Potent Antibiotic Activity without Hemolytic Activity

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CRAMP-18 is an 18-residue functional region, corresponding to residues 16-33 of a mouse-derived antibiotic peptide CRAMP. To develop novel antibiotic peptides possessing strong antibiotic activity against bacterial, fungal and tumor cells without hemolytic activity, three analogs of CRAMP-18 were synthesized containing either Leu- or Lys-substitution. Leusubstitution ([L1, 8]-CRAMP-18) in the hydrophobic helix face of CRAMP-18 induced a dramatic increase in antibiotic activity without a significant increase in hemolytic activity. Lys-substitution ([K2, 13]-CRAMP-18 or [K9, 16]-CRAMP-18) in the hydrophilic helix face produced a smaller response. Therefore, [L1, 8]-CRAMP-18 may be an attractive candidate for developing novel peptide antibiotics.

Keywords: Cramp Analog; Hemolytic; hydrophobic helix face; peptide CRAMP

Document Type: Review Article


Publication date: August 1, 2002

More about this publication?
  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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