期刊
PEPTIDES
卷 26, 期 7, 页码 1113-1119出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.peptides.2005.01.008
关键词
antifungal; Ib-AMP; ionic strength; toxicity; derivative
Seeds of Impatiens balsamina contain a set of related antimicrobial peptides (Ib-AMPs). We have produced a synthetic variant of Ib-AMP1, oxidized to the bicyclic native conformation, which was fully active on yeast and fungal strains; and four linear 20-mer Ib-AMP variants, including two all-D forms. We show that the all-D variants are as active on yeast and fungal strains as native peptides. In addition, fungal growth inhibition nor salt-dependency of Ib-AMP4 could be improved by more than two-fold via replacement of amino acid residues by arginine or tryptophan. Native Ib-AMPs showed no hemolytic nor toxic activity up to a concentration of 100 mu M. All these data demonstrate the potential of the native Ib-AMPs to combat fungal infections. (c) 2005 Elsevier Inc. All rights reserved.
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