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The role of naturally occurring phenols in inducing oscillations in the peroxidase-oxidase reaction

机译:天然酚在过氧化物酶-氧化酶反应中诱导振荡的作用

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摘要

The influence of a series of naturally occurring phenolic compounds on the dynamics of the horseradish peroxidase-catalyzed oxidation of NADH by oxygen (the peroxidase-oxidase reaction) was investigated. Various types of dynamic behaviors are induced in the peroxidase-oxidase reaction upon addition of low concentrations of different phenols. The identity of the particular phenol determines the type of dynamics shown (inhibition of the reaction, monotonic reaction, damped oscillations, sustained oscillations, and complex oscillations), The kind of behavior that a given phenolic compound is able to induce is governed by the reduction potentials for the formation of the phenoxyl radical. The phenolic compounds are shown not to be consumed during the reaction. Mechanistic considerations are made on the basis of the reduction potentials of the different reactants present in the peroxidase-oxidase system. We interpret the role of the phenols as electron mediators of the electron transfer between some enzyme intermediates or O-2(-) and NADH. [References: 54]
机译:研究了一系列天然存在的酚类化合物对辣根过氧化物酶催化的NADH被氧气氧化(过氧化物酶氧化酶反应)动力学的影响。加入低浓度的不同酚后,过氧化物酶-氧化酶反应会引发各种类型的动力学行为。特定酚的身份决定了所显示的动力学类型(反应的抑制,单调反应,阻尼振荡,持续振荡和复杂振荡),给定酚类化合物能够诱导的行为类型由还原决定苯氧基自由基的形成潜力。显示酚类化合物在反应期间不被消耗。基于过氧化物酶-氧化酶系统中存在的不同反应物的还原电位来进行机械考虑。我们解释酚作为某些酶中间体或O-2(-)与NADH之间电子转移的电子介体的作用。 [参考:54]

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