An amphipathic cyclic tetrapeptide scaffold containing halogenated β<sup>2,2</sup>-amino acids with activity against multiresistant bacteria
作者:Marianne H. Paulsen、Eskil André Karlsen、Dominik Ausbacher、Trude Anderssen、Annette Bayer、Philipp Ochtrop、Christian Hedberg、Tor Haug、Johanna U. Ericson Sollid、Morten B. Strøm
DOI:10.1002/psc.3117
日期:2018.10
The present study describes the synthesis and biological studies of a small series of head‐to‐tail cyclic tetrapeptides of the general structure c(Lys‐β2,2‐Xaa‐Lys) containing one lipophilic β2,2‐amino acid and Lys, Gly, Ala, or Phe as the Xaa residue in the sequence. The peptides were investigated for antimicrobial activity against gram‐positive and gram‐negative reference strains and 30 multiresistant
本研究中描述的一小系列的一般结构C的头-尾环四肽(赖氨酸-β的合成和生物学研究2,2-含有一种亲脂性β-Xaa-LYS)2,2--氨基酸,序列中的Xaa残基为Lys,Gly,Ala或Phe。研究了这些肽对革兰氏阳性和革兰氏阴性参考菌株以及30种多重耐药临床分离株的抗菌活性,这些菌株包括具有广谱β-内酰胺酶-卡巴内切酶(ESBL-CARBA)生产菌株。确定对人红细胞的毒性。最有效的肽表现出对革兰氏阳性临床分离株的高活性,最低抑制浓度为4–8μg/ mL,溶血活性低。高的抗微生物活性和低毒性显示含有亲脂性β这些环状四肽的组合2,2 α-氨基酸形成用于设计新的抗微生物剂的宝贵支架。