Kinetics of hydrogen peroxide decomposition by catalase: hydroxylic solvent effects

Bioprocess and Biosystems Engineering
Adina RaducanDumitru Oancea

Abstract

The effect of water-alcohol (methanol, ethanol, propan-1-ol, propan-2-ol, ethane-1,2-diol and propane-1,2,3-triol) binary mixtures on the kinetics of hydrogen peroxide decomposition in the presence of bovine liver catalase is investigated. In all solvents, the activity of catalase is smaller than in water. The results are discussed on the basis of a simple kinetic model. The kinetic constants for product formation through enzyme-substrate complex decomposition and for inactivation of catalase are estimated. The organic solvents are characterized by several physical properties: dielectric constant (D), hydrophobicity (log P), concentration of hydroxyl groups ([OH]), polarizability (α), Kamlet-Taft parameter (β) and Kosower parameter (Z). The relationships between the initial rate, kinetic constants and medium properties are analyzed by linear and multiple linear regression.

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Citations

Jul 16, 2013·Polymer International·Gulden Camci-UnalAli Khademhosseini
Jun 26, 2014·Applied Biochemistry and Biotechnology·Sha XuJian Chen
Mar 14, 2019·Mini Reviews in Medicinal Chemistry·Miroslav Pohanka

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