Chloroperoxidase: Use of a Hydrogen Peroxide-Stat for Controlling Reactions and Improving Enzyme Performance

The use of a hydrogen peroxide-stat for controlling the hydrogen peroxide concentration has been demonstrated for the chloroperoxidase catalyzed oxidation of indole. It has been shown that in tert-butyl alcohol/water mixtures the oxidation can be effectively controlled by a hydrogen peroxide-stat. In this medium chloroperoxidase was stabilized towards oxidative destruction as long as indole was present in the reaction mixture but inactivation occurred in the absence of a reductant. In contrast with the results with to-r-butyl alcohol/water mixtures chloroperoxidase was inactivated in water by hydrogen peroxide even when indole was present in the reaction mixture and the oxidant concentration was as low as 30.