Antimicrobial peptides have recently gained the much attention because of their ability to make defense system from attacking bacterial infections. Drosocin has been considered as very attractive antibiotic agents because of low toxicity against human erythrocytes and active at the low concentration. We have studied the structureactivity relationship of a glycopeptide drosocin focused on the N-acetyl-D-galactoside at $Thr^11}$ residue. Based on the radial diffusion assay, we found that the acetylation of carbohydrate moiety increased the antimicrobial activity and the $Pro^10}$, present in the middle of drosocin plays an important role in the antimicrobial activity. Our results provide a good lead compound for further studies on the design of drosocin-based analogues targeting glyco linked Thr site.
抗菌肽最近受到了广泛关注,因为它们能够保护防御系统免受细菌感染的攻击。由于对人类红细胞的低毒性以及在低浓度下的活性,drosocin被认为是非常有吸引力的抗生素。我们研究了一种糖肽drosocin的结构活性关系,重点关注位于
$Thr^11}$残基上的N-乙酰-
D-半乳糖苷。基于径向扩散实验,我们发现
碳水化合物成分的乙酰化提高了抗菌活性,而位于drosocin中间的
$Pro^10}$在抗菌活性中起着重要作用。我们的结果为进一步研究以drosocin为基础的类似物设计靶向糖链接的Thr位点提供了良好的先导化合物。