Amino acids and peptides. XXII. Synthesis of substrates and inhibitors of human leukocyte cathepsin G.
作者:YOSHIO OKADA、YUKO TSUDA、NAOKI TENO、YOKO NAGAMATSU、UTAKO OKAMOTO
DOI:10.1248/cpb.36.4794
日期:——
Suc-Tyr-Leu-Phe-pNA is a good substrate for human leukocyte cathepsin G and χ-chymotrypsin but not for human leukocyte elastase (HLE). However, Suc-Tyr-D-Leu-D-Phe-pNA inhibited not only cathepsin G and χ-chymotrypsin but also HLE (Ki values, 1.1, 0.94 and 0.16mM, respectively). The p-nitroanilide (pNA) moiety of Suc-Tyr-Leu-Phe-pNA and Suc-Tyr-D-Leu-D-Phe-pNA was substituted with p-benzoylaniline (BZA), p-acetylaniline (ACA), 4-benzylpiperidine (BPP) and 4-methylpiperidine (Pipe). The relationship between the structure and inhibitory effect on HLE, cathepsin G and χ-chymotrypsin was studied. Suc-Tyr-Leu-Phe-BZA inhibited HLE, cathepsin G and χ-chymotrypsin with Ki values of 0.027, 0.1 and 0.01mM, respectively.
Suc-Tyr-Leu-Phe-pNA是一种适用于人白细胞组织蛋白酶G和χ-胰蛋白酶的良好底物,但对于人白细胞弹性蛋白酶(HLE)则不是。然而,Suc-Tyr-D-Leu-D-Phe-pNA不仅抑制了组织蛋白酶G和χ-胰蛋白酶,还抑制了HLE(其Ki值分别为1.1、0.94和0.16mM)。将Suc-Tyr-Leu-Phe-pNA和Suc-Tyr-D-Leu-D-Phe-pNA的p-硝基苯胺(pNA)部分替换为p-苯甲酰苯胺(BZA)、p-乙酰苯胺(ACA)、4-苄基哌啶(BPP)和4-甲基哌啶(Pipe)。研究了这些结构与对HLE、组织蛋白酶G和χ-胰蛋白酶的抑制效应之间的关系。Suc-Tyr-Leu-Phe-BZA对HLE、组织蛋白酶G和χ-胰蛋白酶的抑制Ki值分别为0.027、0.1和0.01mM。