论文标题
FMO研究人雌激素受体$α$与选定配体之间的相互作用能量
FMO Study of the Interaction Energy between Human Estrogen Receptor $α$ and Selected Ligands
论文作者
论文摘要
在水性培养基中进行了碎片分子轨道(FMO)计算,这使我们能够在人雌激素受体$α$α$α$配体结合域(ER)和所选的配体(L):17 $β$ -ESTRADIOL(E2),17 $α$ -Estradiol(17 $α$ -Estradiol(17 $ -Etradiol)(17 $ -ENTIOL(17 $ -EAN),ETIOL(ER),ETRIOL(ER),ETRIOL(ER),ETRIOL(ER),ETRIOL(ER),ETRIOL(ER),ETRADIOL(e2)二乙基苯甲酸酯(DES),双酚A(BPA),双酚AF(BPAF),羟基氯(HPTE)和甲氧氯(DMDT)。这些计算是根据从分子动力学模拟获得的L-ER复合物的代表性结构进行的。 Kcal/mol中的MP2/6-31G(D)L-ER FMO相互作用能量如下: E3(-100.1)<gnt(-95.8)<e2(-88.5)<bpa(-84.7)<des(-82.6)<bpaf(-80.6)<bpaf(-80.6)<17 $α$ -e2(-78.7) 配体的中央疏水核与ER的几种Acolar氨基酸残基相互作用。 GLU 353及其524通过氢键与苯酚A形环和末端羟基化环的氢键通过氢键分别与大多数配体相互作用。在受体的结合位点发现了水分子。在我们的模型系统中,我们已经证明了配体 - 受体复合物中通常观察到的:配体和结合位点表面上组的空间和化学互补性。
Fragment molecular orbital (FMO) calculations were performed in aqueous media which allowed us to obtain the interaction energy between the human estrogen receptor $α$ ligand-binding domain (ER) and the selected ligands (L): 17$β$-estradiol (E2), 17$α$-estradiol (17$α$-E2), estriol (E3), genistein (GNT), diethylstilbestrol (DES), bisphenol A (BPA), bisphenol AF (BPAF), hydroxychlor (HPTE) and methoxychlor (DMDT). These calculations were carried out on representative structures of L-ER complexes obtained from molecular dynamics simulations. The MP2/6-31G(d) L-ER FMO interaction energy in kcal/mol is as follows: E3 (-100.1) < GNT (-95.8) < E2 (-88.5) < BPA (-84.7) < DES (-82.6) < BPAF (-80.6) < 17$α$-E2 (-78.7) < HPTE (-75.9) < DMDT (-46.3) The central hydrophobic core of the ligands interacts attractively with several apolar amino acid residues of ER. Glu 353 and His 524 interacts strongly with most ligands through a hydrogen bond with the hydroxyl group of the phenol A-ring and the terminal hydroxylated ring, respectively. Water molecules were found at the binding site of receptor. In our model systems we have demonstrated what is generally observed in ligand-receptor complexes: the steric and chemical complementarity of the groups on the ligand and binding site surfaces.