论文部分内容阅读
将天然氨基酸149个疏水性质经主成分分析得到了一种新氨基酸描述子——氨基酸广义疏水标度(GH-scale)．用GH—scale结合遗传偏最小二乘(GPLS)算法对152个HLA-A*0201限制性CTL表位进行定量构效关(QSAR)研究．所建模型拟合及交叉检验复相关系数分别为Rcum2=0．813和Q2=0．725．研究表明,疏水作用在CTL表位与HLA-A*0201结合过程中扮演极其重要角色,而锚定残基是该类作用发生最显著的部位．
A new amino acid descriptor-amino acid generalized hydrophobic scale (GH-scale) was obtained by principal component analysis of 149 hydrophobic properties of natural amino acids. Quantitative structure-activity (QSAR) studies of 152 HLA-A * 0201-restricted CTL epitopes were performed using a GH-scale combined with genetic partial least squares (GPLS) algorithm. The built-in model fitting and cross-test complex correlation coefficient Rcum2 = 0.813 and Q2 = 0.725. Studies have shown that hydrophobicity plays an important role in the binding of CTL epitopes to HLA-A * 0201, and anchor residues are the most prominent sites for this class of actions.