An antibody molecule or molecule containing antibody combining site portions (catalytic molecule) that catalytically hydrolyzes a preselected carboxylic acid amide or ester bond of a reactant ligand, methods of making and using the catalytic molecule, and cells that produce those molecules are disclosed. The catalytic molecules bind to a reactant ligand containing the bond to be hydrolyzed and also to a haptenic ligand. The haptenic ligand is structurally analogous to the reactant ligand and contains a tetrahedral carbon atom that is bonded to a hydroxyl group and to a saturated carbon atom at a position in the haptenic ligand that corresponds to position of the carbonyl group and its bonded heteroatom of the reactant ligand. The haptenic ligand also contains a group that bears an ionic charge in aqueous solution at physiological pH values that is not present at a corresponding position of the reactant ligand. The ionic charge-bearing group is located in the hapten within 7 .ANG.ngstroms of the tetrahedral carbon atom.
本文介绍了一种
抗体分子或含有
抗体结合位点部分(催化分子),该催化分子具有催化
水解反应
配体的预选
羧酸酰胺或酯键的能力,以及制备和使用该催化分子的方法和产生这些分子的细胞。催化分子结合到含有要
水解的键的反应
配体上,并且还结合到一个半抗原
配体上。半抗原
配体在结构上类似于反应
配体,并且在半抗原
配体中,一个四面体碳原子与一个羟基和一个饱和碳原子键合,该四面体碳原子的位置对应于反应
配体的羰基团和其键合杂原子的位置。半抗原
配体还包含一个在生理pH值下在
水溶液中带有离子电荷的基团,该离子电荷基团在反应
配体的相应位置上不存在。该带电基团在半抗原内距离四面体碳原子小于7埃。