The inhibition of alpha-chymotrypsin predicted using theoretically derived molecular properties

被引:3
作者
Beck, B
Glen, RC
Clark, T
机构
[1] UNIV ERLANGEN NURNBERG,INST ORGAN CHEM,COMP CHEM CENTRUM,D-91052 ERLANGEN,GERMANY
[2] WELLCOME RES LABS,BECKENHAM BR3 3BS,KENT,ENGLAND
来源
JOURNAL OF MOLECULAR GRAPHICS | 1996年 / 14卷 / 03期
关键词
alpha-chymotrypsin; computational chemistry; QSAR; neural networks;
D O I
10.1016/S0263-7855(96)00041-0
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
The structures and molecular properties of 95 aromatic and heteroaromatic ligands previously tested as reversible inhibitors of chymotrypsin catalysis have been calculated using AM1. The properties obtained have been used as input for multiple linear regression analysis and as descriptors for a back-propagation neural network to predict the binding affinity of alpha-chymotrypsin inhibitors. Using polarizability, molecular shape, electrostatic similarity, dipole moment, ClogP, and the diagonalized quadrupole moments of the ligands, correlation coefficients between calculated and experimental affinities of 0.96 for the training set and 0.89 for the test set were obtained using a neural network. The performance of the multiple linear regression was significantly worse, although useful QSARs were also obtained.
引用
收藏
页码:130 / &
页数:7
相关论文
共 23 条
[1]  
*B B ASS, 1990, ARTH 81 VERS 3
[2]   THE NATURAL ATOMIC ORBITAL POINT-CHARGE MODEL FOR PM3 - MULTIPOLE MOMENTS AND MOLECULAR ELECTROSTATIC POTENTIALS [J].
BECK, B ;
RAUHUT, G ;
CLARK, T .
JOURNAL OF COMPUTATIONAL CHEMISTRY, 1994, 15 (10) :1064-1073
[3]  
BECK B, UNPUB
[4]   STRUCTURE AND MECHANISM OF CHYMOTRYPSIN [J].
BLOW, DM .
ACCOUNTS OF CHEMICAL RESEARCH, 1976, 9 (04) :145-152
[5]  
BORN M, 1924, ANN PHYS, V84, P357
[6]  
BUCKINGHAM AD, 1959, QUART REV LONDON, V13, P189
[7]  
*DAYL CHEM INF SYS, 1989, POM89 PHYS DAT MEDCH
[8]   USING SHAPE COMPLEMENTARITY AS AN INITIAL SCREEN IN DESIGNING LIGANDS FOR A RECEPTOR-BINDING SITE OF KNOWN 3-DIMENSIONAL STRUCTURE [J].
DESJARLAIS, RL ;
SHERIDAN, RP ;
SEIBEL, GL ;
DIXON, JS ;
KUNTZ, ID ;
VENKATARAGHAVAN, R .
JOURNAL OF MEDICINAL CHEMISTRY, 1988, 31 (04) :722-729
[9]  
DRAPER NR, 1981, APPLIED REGRESSION A
[10]   NEW OPTIMIZATION HEURISTICS - THE GREAT DELUGE ALGORITHM AND THE RECORD-TO-RECORD TRAVEL [J].
DUECK, G .
JOURNAL OF COMPUTATIONAL PHYSICS, 1993, 104 (01) :86-92