Peptidotriazoles with antimicrobial activity against bacterial and fungal plant pathogens

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• 作者：Imma Gü ; ell^a ; Lluí ; s Micaló ; ^a ; Laura Cano^a ; Esther Badosa^b ; Rafael Ferre^a ; Emilio Montesinos^b ; Eduard Bardají ; ^a ; Lidia Feliu^a ; ^{lidia.feliu@udg.edu} ; Marta Planas^a ; ^{marta.planas@udg.edu}
• 关键词：Antimicrobial peptides ; Click reaction ; Peptidomimetics ; Heterocyclic peptides
• 刊名：Peptides
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：33
• 期：1
• 页码：9-17
• 全文大小：392 K

文摘

We designed and prepared peptidotriazoles based on the antimicrobial peptide BP100 (LysLysLeuPheLysLysIleLeuLysTyrLeu-NH₂) by introducing a triazole ring in the peptide backbone or onto the side chain of a selected residue. These compounds were screened for their in vitro growth inhibition of bacterial and fungal phytopathogens, and for their cytotoxic effects on eukaryotic cells and tobacco leaves. Their proteolytic susceptibility was also analyzed. The antibacterial activity and the hemolysis were influenced by the amino acid that was modified with the triazole as well as by the absence of presence of a substituent in this heterocyclic ring. We identified sequences active against the bacteria Xanthomonas axonopodis pv. vesicatoria, Erwinia amylovora, Pseudomonas syringae pv. syringae (MIC of 1.6-12.5 ¦ÌM), and against the fungi Fusarium oxysporum (MIC < 6.2-12.5 ¦ÌM) with low hemolytic activity (0-23 % at 50 ¦ÌM), high stability to protease digestion and no phytotoxicity. These peptidotriazoles constitute good candidates to design new antimicrobial agents.