The quantitative relationship between the structure of oxime-ether compounds containing sulfur(oxygen) and their insecticidal activity against leafhopper was studied by comparative molecular field analysis(CoMFA). The...The quantitative relationship between the structure of oxime-ether compounds containing sulfur(oxygen) and their insecticidal activity against leafhopper was studied by comparative molecular field analysis(CoMFA). The results showed that the contributions of steric and electrostatic fields to the activity were 47.5% and 52.5%, respectively. The coefficient q2 of cross validation and the relation coefficient r2 of non-cross validation for the model established by the study were 0.628 and 0.971, respectively, its F value was 133.840 and the standard deviation was 0.109. These values indicated that the model might have a good predictability. The contour maps of the model will give the basis on the structure modification.展开更多
1型细胞周期蛋白依赖性激酶(cyclin-dependent kinase 1,CDK1)在人体内是有效的抗癌作用靶标.使用三维定量构效关系研究方法,包括比较分子场分析法(comparative molecular field analysis,CoM-FA)和比较分子相似性指数分析法(comparativ...1型细胞周期蛋白依赖性激酶(cyclin-dependent kinase 1,CDK1)在人体内是有效的抗癌作用靶标.使用三维定量构效关系研究方法,包括比较分子场分析法(comparative molecular field analysis,CoM-FA)和比较分子相似性指数分析法(comparative molecular similarity indices analysis,CoMSIA),分析23个CDK1激酶抑制剂的分子结构与生物活性之间的定量关系.相对其他类型电荷,当训练集加载Gasteiger-Huckel电荷时,CoMFA获得一个最优的三维定量构效关系模型,其交叉验证系数q2为0.668,非交叉验证相关系数R2为0.941,表明模型具有较好的预测能力.使用测试集交叉验证说明该模型稳定可靠,模型中立体场贡献率为69.8%,静电场贡献率为30.2%.展开更多
文摘The quantitative relationship between the structure of oxime-ether compounds containing sulfur(oxygen) and their insecticidal activity against leafhopper was studied by comparative molecular field analysis(CoMFA). The results showed that the contributions of steric and electrostatic fields to the activity were 47.5% and 52.5%, respectively. The coefficient q2 of cross validation and the relation coefficient r2 of non-cross validation for the model established by the study were 0.628 and 0.971, respectively, its F value was 133.840 and the standard deviation was 0.109. These values indicated that the model might have a good predictability. The contour maps of the model will give the basis on the structure modification.
文摘1型细胞周期蛋白依赖性激酶(cyclin-dependent kinase 1,CDK1)在人体内是有效的抗癌作用靶标.使用三维定量构效关系研究方法,包括比较分子场分析法(comparative molecular field analysis,CoM-FA)和比较分子相似性指数分析法(comparative molecular similarity indices analysis,CoMSIA),分析23个CDK1激酶抑制剂的分子结构与生物活性之间的定量关系.相对其他类型电荷,当训练集加载Gasteiger-Huckel电荷时,CoMFA获得一个最优的三维定量构效关系模型,其交叉验证系数q2为0.668,非交叉验证相关系数R2为0.941,表明模型具有较好的预测能力.使用测试集交叉验证说明该模型稳定可靠,模型中立体场贡献率为69.8%,静电场贡献率为30.2%.
