Identification of Inhibitors of an 80kDa Protease from Trypanosoma cruzi through the Screening of a Combinatorial Peptide Library.
作者:Sandrine VENDEVILLE、Eric BUISINE、Xavier WILLIARD、Joseph SCHREVEL、Philippe GRELLIER、Jaime SANTANA、Christian SERGHERAERT
DOI:10.1248/cpb.47.194
日期:——
Two orthogonal peptide combinatorial libraries were screened to discover inhibitors of Tc80 protease, a novel target from Trypanosoma cruzi involved in host cell invasion. These libraries were composed of 15625 structurally diversified tripeptides, partitioned in 125 mixtures. The screening led to a low micromolar inhibitor which was actually an HF cleavage by-product H-Ipe-D-Tic-D-Glu(S-paratolyl)-OH. IC50 values of several analogous molecules of this hit were determined and are discussed. For the best compounds, conformational analysis revealed a high degree of similarity in shape with a potent prolylendopeptidase inhibitor, SUAM-1221.
我们筛选了两个正交肽组合文库,以发现 Tc80 蛋白酶的抑制剂,Tc80 蛋白酶是克氏锥虫的一个新靶标,参与宿主细胞的侵袭。这些文库由 15625 个结构多样化的三肽组成,分成 125 个混合物。筛选出的低微摩尔抑制剂实际上是一种高频裂解副产物 H-Ipe-D-Tic-D-Glu(S-paratolyl)-OH。我们测定并讨论了这一发现的几个类似分子的 IC50 值。对于最佳化合物,构象分析显示其形状与强效脯氨酰内肽酶抑制剂 SUAM-1221 高度相似。