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第 1 期 仝建波,等: HEPT 类 HIV-1 逆转录酶衍生物的 CoMFA、CoMSIA 及 HQSAR 分析 ·65·
中性贡献。 活性具有可靠的预测能力。并且通过研究模型力场
2.5 QSAR 模型辅助的分子设计 的三维等势图和 HQSAR 色码图分析确立了 HEPT
分子场的三维等势图由于覆盖的区域过大,不 类衍生物改造位点为 R 2 取代基位置,应在 R 2 位置
能准确定位需要修改基团的位置;HQSAR 模型的色 处引入大基团的亲水性取代基,进而设计出了具有
码贡献图能够准确定位分子场的取代活性位点,但 较高活性的 7 个 HEPT 类化合物,为新型 HEPT 类
不能判断取代基团的性质,因此,CoMFA、CoMSIA 化合物的设计提供了思路。
模型和 HQSAR 模型的结合可以准确确定目标分子
参考文献:
的活性取代位点。综合分析可知,立体场和疏水场
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本文采用 CoMFA、CoMSIA 和 HQSAR 对 79
activity relationship study of anti-HIV activity of substituted HEPT
个 HEPT 类衍生物进行构效关系建模,建立了 using nonlinear models[J]. Medicinal Chemistry Research, 2013,
2
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2
为 0.892;CoMSIA 模型显示,最佳 q 为 0.636,r 2 technique in the molecular design of dipeptidyl boronic acid
2
为 0.953;最佳的 HQSAR 模型显示,q 为 0.876, proteasome inhibitors[J]. Journal of the Serbian Chemical Society,
2
r 为 0.929,最佳全息长度为 97。最终得到稳定的 2016, 82: 1025-1037.
计算模型,模型简单直观,易于解释,且对化合物 (下转第 73 页)