Catalysis of the Hydrolysis of<i>p</i>-Nitrophenyl 1-Adamantaneacetate by Cyclodextrins
作者:Makoto Komiyama、Shohei Inoue
DOI:10.1246/bcsj.53.3266
日期:1980.11
The cleavage of p-nitrophenyl 1-adamantaneacetate was accelerated by β- and γ-cyclodextrins, which was in contrast with their deceleration of the cleavage of a sterically analogous substrate, p-nitrophenyl 1-adamantanecarboxylate. The presence and absence of a methylene group in these substrates absolutely governed the directions of the rate effects of the cyclodextrins. The specificity, explicitly showing that cyclodextrins are quite good models of enzymes, was attributed to the difference of the structures of the inclusion complexes of cyclodextrins with these substrates.
β-和γ-环糊精加速了对硝基苯基 1-金刚烷乙酸酯的裂解,这与它们对立体类似底物--对硝基苯基 1-金刚烷羧酸酯--裂解的减速作用形成鲜明对比。这些底物中是否存在亚甲基完全决定了环糊精速率效应的方向。由于环糊精与这些底物的包合物结构不同,因此具有特异性,这明确表明环糊精是相当好的酶模型。