Amino Acids and Peptides. LIII. Synthesis and Biological Activities of Some Pseudo-Peptide Analogs of PKSI-527, a Plasma Kallikrein Selective Inhibitor. The Importance of the Peptide Backbone.
作者:Atsuko FUKUMIZU、Yoko TSUDA、Keiko WANAKA、Mayako TADA、Shosuke OKAMOTO、Akiko HIJIKATA-OKUNOMIYA、Yoshio OKADA
DOI:10.1248/cpb.47.1141
日期:——
Pseudo-peptide analogs of trans-4-aminomethylcyclohexanecarbonyl-L-phenylalanyl-4-aminophenyl acetic acid (PKSI-527, plasma kallikrein selective inhibitor), in which an amide bond (peptide bond) has been replaced by a CH2-NH bond, i.e. trans-4-aminomethylcyclohexanecarbonyl-L-phenylalanyl-Ψ(CH2-NH)-4-aminophenyl acetic acid (I), trans-4-aminomethylcyclohexanecarbonyl-Ψ(CH2-NH)-L-phenylalanyl-4-aminophenyl acetic acid (II) and trans-4-aminomethylcyclohexanecarbonyl-D-phenylalanyl-Ψ(CH2-NH)-4-aminophenyl acetic acid (III) were synthesized. These pseudo-peptide analogs did not exhibit any detectable inhibitory activity against plasma kallikrein (PK), plasmin (PL), urokinase (UK), thrombine (TH) or trypsin (TRY). These results indicate that both carbonyl groups in the PKSI-527 are important for the manifestation of potent inhibitory activity against plasma kallikrein.
反式-4-氨甲基环己甲酰基-L-苯丙氨酰-4-氨基苯乙酸(PKSI-527,血浆激肽选择性抑制剂)的伪肽类似物,其中的酰胺键(肽键)被 CH2-NH 键取代,即反式-4-氨甲基环己基羰基-L-苯丙氨酰-Ψ(CH2-NH)-4-氨基苯乙酸(I)、合成了反式-4-氨甲基环己甲酰-Ψ(CH2-NH)-L-苯丙氨酰-4-氨基苯乙酸(II)和反式-4-氨甲基环己甲酰-D-苯丙氨酰-Ψ(CH2-NH)-4-氨基苯乙酸(III)。这些假肽类似物对血浆钙激酶(PK)、血浆蛋白酶(PL)、尿激酶(UK)、凝血酶(TH)或胰蛋白酶(TRY)没有表现出任何可检测到的抑制活性。这些结果表明,PKSI-527 中的两个羰基对于表现出对血浆钙激酶的强效抑制活性非常重要。