Design and Synthesis of Non-Peptide Ras CAAX Mimetics as Potent Farnesyltransferase Inhibitors
作者:Yimin Qian、Andreas Vogt、Saïd M. Sebti、Andrew D. Hamilton
DOI:10.1021/jm950414g
日期:1996.1.1
These non-peptide mimetics are potent inhibitors of FTase (IC50 = 40 nM for the most potent inhibitor) and are highly selective for FTase over GGTase I (geranylgeranyltransferase I). They are not substrates for farnesylation, do not have peptidic features, and have no hydrolyzable bonds. Structure-activity studies reveal the importance of the position of the carboxylic acid on the aryl ring as well as
ras癌基因产物Ras的半胱氨酸法呢基化对于其转化活性是必需的,并且被法呢基转移酶(FTase)催化。Ras羧基末端四肽CAAX(C是半胱氨酸,A是任何脂肪族氨基酸,X是蛋氨酸或丝氨酸)是FTase识别的最小序列。我们在这里报告Ras CAAX非肽模拟物的设计,合成和生物学特性,其中半胱氨酸通过还原的伪肽键与4-氨基-3'-羧基联苯相连。这些非肽模拟物是FTase的有效抑制剂(IC50 = 40 nM,是最有效的抑制剂),对FTase的选择性高于GGTase I(香叶基香叶基转移酶I)。它们不是法呢基化的底物,没有肽特征,也没有可水解键。结构活性研究揭示了芳基环上羧酸位置以及半胱氨酸酰胺键还原的重要性。在4-氨基-3'-羧基联苯的2-位取代可提高抑制能力,而羧酸的去除则会导致抑制活性降低10倍。