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Prediction of TAP Binding Affinity of Peptide and Selection Specificity Using VHSE Descriptors
Author(s): PAN Xian-Chao1, MEI Hu1, 2*, XIE Jiang-An2, L Juan2, WANG Qing2, ZHANG Ya-Lan2, TAN Wen2
Pages: 2556-
2562
Year: 2012
Issue:
11
Journal: Chemical Journal of Chinese Universities
Keyword: 抗原处理相关转运蛋白; 抗原肽; 氨基酸描述子VHSE; 支持向量机; 活性; 选择特异性;
Abstract: 应用氨基酸描述子VHSE(Principal component score vector of hydrophobic,steric,and electronic proper-ties)对613个抗原9肽进行结构表征,在此基础上,采用支持向量机结合逐步回归变量筛选方法,成功建立了抗原肽抗原处理相关转运蛋白(Transporter associated with antigen processing,TAP)亲和活性预测模型,最优线性支持向量机模型的R2,Q2和R2ext分别为0.7386,0.7270和0.6057.模型结果分析表明,影响TAP亲和活性的首要因素是电性,其次是立体和疏水性质;底物9肽的P1(N端)及P2,P7和P9(C端)位氨基酸物化性质对TAP亲和活性有重要影响,而P3,P4,P5和P6位对模型贡献相对较小,P8位则与活性无关.依据最优模型对模拟点突变9肽的TAP亲和活性的预测结果,并结合变量载荷分析,对TAP底物选择特异性进行了分析和总结.
Citations
- 梅虎,杨力,舒茂,刘丽,李志良. 后叶催产素的定量构效关系研究 [J]. 高等学校化学学报 .
2007(05)
- Scholz C,Tampe R. The intracellular antigen transport machinery TAP in adaptive immunity and virus escape mechanisms .
Journal of Bioenergetics and Biomembranes
. 2005
- Beismann-Driemeyer,S,Tampé,R. Function of the antigen transport complex TAP in cellular immunity .
Angewandte Chemie International Edition
. 2004
- Falk,K,Rotzschke,O.,Stevanovic,S.,Jung,G.,Rammensee,H.G. Nature
. 1991
- Uebel S et al. Proceedings of the National Academy of Sciences of the United States of America
. 1997
- Van Endert P M,Tiganelli D,Greco G,et al. The peptidebinging motif for the hman transporter associated with antigen processing .
The Journal of Experimental Medicine
. 1995
- PA Reche,JP Glutting,EL Reinherz. Human Immunology
. 2002
- B Peters,S Bulik,R Tampe,PM Endert,HG Holzhutter. Identifying MHC class I epitopes by predicting the TAP transport efficiency of epitope precursors .
J Immunol
. 2003
- Kleijmeer,MJ,Kelly,A,Geuze,HJ,Slot,JW,Townsend,Trowsdale,J. Location of MHC-encoded transporters in the endoplasmic reticulum and cis-Golgi .
Nature
. 1992
- Schmitt L,Tampe R. Structure and mechanism of ABC transport-ers .
Current Opinion in Structural Biology
. 2002
- R Abele,R Tampe. The ABCs of immunology: structure and function of TAP, the transporter associated with antigen processing .
Physiology (Bethesda)
. 2004