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  • Title: Cytolytic and antibacterial activity of synthetic peptides derived from amoebapore, the pore-forming peptide of Entamoeba histolytica.
    Author: Leippe M, Andrä J, Müller-Eberhard HJ.
    Journal: Proc Natl Acad Sci U S A; 1994 Mar 29; 91(7):2602-6. PubMed ID: 8146160.
    Abstract:
    The pore-forming peptide amoebapore is considered part of the cytolytic armament of pathogenic Entamoeba histolytica. Amoebapore is composed of 77 amino acid residues arranged in four alpha-helical domains. For structure-function analysis, synthetic peptides were constructed corresponding to these four domains: H1 (residues 1-22), H2 (25-39), H3 (40-64), and H4 (67-77). The peptides H1 and H3, representing two highly amphipathic alpha-helical regions of amoebapore, possessed pore-forming activity. Peptide H3 displayed cytolytic and antibacterial functions similar to those of natural amoebapore. The most potent antibacterial activity and the broadest activity spectrum were expressed by H1-Mel, a hybrid molecule composed of the N-terminal alpha-helix of amoebapore and the C-terminal hexapeptide of melittin from the venom of Apis mellifera.
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