A novel constrained reduced-amide inhibitor of HIV-1 protease derived from the sequential incorporation of .gamma.-turn mimetics into a model substrate
作者:Kenneth A. Newlander、James F. Callahan、Michael L. Moore、Thaddeus A. Tomaszek、William F. Huffman
DOI:10.1021/jm00068a008
日期:1993.8
through P1' positions of substrate, was found to be an inhibitor with a Ki of 147 microM. Reduction of the amide bond in the C7 mimetic of IIIa resulted in a novel constrained reduced-amide mimetic VIa with a Ki of 430 nM. This corresponds to over a 300-fold improvement in inhibitory activity over the original C7 mimetic. The inhibitory activity of mimetic VIa was in addition found to be 44-fold better than
将设计成将肽链的三个氨基酸残基锁定为γ转构型的C7模拟物依次引入模型HIV-1蛋白酶底物I(产生化合物II-IV)的P3至P2'位之间,以进行探测其结合HIV-1蛋白酶的构象要求。在这些化合物中,发现具有C7模拟物替代Asn-Tyr-Pro的化合物IIIa(对应于底物的P2至P1'位置)是Ki为147 microM的抑制剂。IIIa的C7模拟物中酰胺键的还原产生了新的约束还原酰胺模拟物VIa,Ki为430 nM。这对应于抑制活性比原始C7模拟物提高300倍以上。