Kinetics of peroxidase-catalyzed oxidation of quercetin in the presence of β-cyclodextrin

被引：0
作者：
Oleinik L.I. [1 ]
Buslova T.S. [1 ]
Veselova I.A. [1 ]
Shekhovtsova T.N. [1 ]
机构：
[1] Division of Analytical Chemistry, Department of Chemistry, Moscow State University
来源：
Moscow University Chemistry Bulletin | 2011年 / 66卷 / 3期
关键词：
β-cyclodextrin; horseradish peroxidase; quercetin;
D O I：
10.3103/S0027131411030084
中图分类号：
学科分类号：
摘要：
It is established that the rate of peroxidase-catalyzed oxidation of flavonoid quercetin is increased by 20% in the presence of macrocyclic complexing agent β-cyclodextrin. The comparison of the kinetic parameters of the indicated reaction in the presence and in the absence of β-cyclodextrin shows that its introduction does not significantly influence the specificity of the enzyme with respect to the reducing substrate (characterized as kcat/KM ratio), while the increase in the reaction rate does not depend on the duration of the incubation of quercetin with β-cyclodextrin. It is assumed that the increase of the reaction rate is associated with nonspecific interaction between β-cyclodextrin and quercetin oxidation product. © 2011 Allerton Press, Inc.
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页码：166 / 170
页数：4
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