Improved Bioactivity of Antimicrobial Peptides by Addition of Amino-Terminal Copper and Nickel (ATCUN) Binding Motifs
作者:M. Daben Libardo、Jorge L. Cervantes、Juan C. Salazar、Alfredo M. Angeles-Boza
DOI:10.1002/cmdc.201402033
日期:2014.5.6
Antimicrobial peptides (AMPs) are promising candidates to help circumvent antibiotic resistance, which is an increasing clinical problem. Amino‐terminal copper and nickel (ATCUN) binding motifs are known to actively form reactive oxygen species (ROS) upon metal binding. The combination of these two peptidic constructs could lead to a novel class of dual‐acting antimicrobial agents. To test this hypothesis
抗菌肽 (AMP) 是帮助规避抗生素耐药性的有希望的候选者,这是一个日益严重的临床问题。已知氨基末端铜和镍 (ATCUN) 结合基序在金属结合时会主动形成活性氧 (ROS)。这两种肽结构的组合可以产生一类新型的双作用抗菌剂。为了验证这一假设,筛选了一组 ATCUN 结合基序的诱导 ROS 形成能力,然后使用最有效的基序来修饰具有不同作用模式的 AMP。含 ATCUN 结合基序的 anoplin (GLLKRIKTLL-NH 2 )、促凋亡肽 (PAP; KLAKLAKKLAKLAK-NH 2 ) 和sh -buforin (RAGLQFPVGRVHRLLRK-NH 2) 的衍生物) 被合成并发现对一组临床相关细菌比亲本 AMP 更具活性。ATCUN-anoplin 肽较低的最小抑制浓度 (MIC) 值归因于较高的成孔活性以及它们引起 ROS 诱导的膜损伤的能力。将 ATCUN 基序添加到 PAP