Aurein1.2 is secreted by the Australian tree frog Litoria aurea and is active against a broad range of infectious microbes including bacteria, fungi, and viruses. Its antifungal potency has garnered considerable interest in developing novel classes of natural antifungal agents to fight pathogenic infection by fungi. However, serious pharmacological hurdles remain, hindering its clinical translation. To alleviate its susceptibility to proteolytic degradation and improve its antifungal activity, six conformationally locked peptides were synthesized through hydrocarbon stapling modification and evaluated for their physicochemical and antifungal parameters. Among them, SAU2‐4 exhibited significant improvement in helicity levels, protease resistance, and antifungal activity compared to the template linear peptide Aurein1.2. These results confirmed the prominent role of hydrocarbon stapling modification in the manipulation of peptide pharmacological properties and enhanced the application potential of Aurein1.2 in the field of antifungal agent development.
Aurein1.2 由澳大利亚树蛙 Litoria aurea 分泌,对包括细菌、真菌和病毒在内的多种传染性微
生物具有活性。它的抗真菌功效引起了人们对开发新型天然抗真菌剂以对抗真菌病原体感染的极大兴趣。然而,严重的药理障碍仍然存在,阻碍了它的临床转化。为了降低其蛋白
水解敏感性并提高其抗真菌活性,我们通过碳氢化合物订书钉修饰合成了六种构象锁定肽,并对其理化和抗真菌参数进行了评估。其中,与模板线性肽 Aurein1.2 相比,
SAU2-4 在螺旋度
水平、
抗蛋白酶能力和抗真菌活性方面都有显著提高。这些结果证实了烃钉书钉修饰在操纵
多肽药理特性方面的突出作用,并提高了 Aurein1.2 在抗真菌剂开发领域的应用潜力。