from Bjerkandera adusta
Enzyme Commission (EC) Number: 188.8.131.52
Mn(II): hydrogen-peroxide oxidoreductase / diarylpropane: oxygen, hydrogen-peroxide oxidoreductase
For in vitro use only!
Unit Definition: One unit is defined as the amount of enzyme that oxidizes 1.0 μmole of Mn(II) per minute at pH 4.5 and 25 °C.
Shipping: shipped on blue ice
Storage Conditions: store at -20 °C
Shelf Life: 12 months
Form: Freeze-dried brown-coloured amorphous powder, no stabilizing agent added
Versatile peroxidase (syn. hybrid peroxidase, manga-nese-lignin peroxidase) is a new ligninolytic enzyme, combining catalytic properties of manganese peroxi-dase (oxidation of Mn(II)), lignin peroxidase (Mn-inde-pendent oxidation of non-phenolic aromatic com-pounds) and plant peroxidase (oxidation of hydro-quinones and substituted phenols). The manganese peroxidase component catalyzes the oxidation of Mn(II) to Mn(III) by H2O2. The highly reactive Mn(III) is stabilized via chelation in the presence of dicarboxylic acid.
2 Mn(II) + 2 H+ + H2O2 → 2 Mn(III) + 2 H2O
The lignin peroxidase component catalyzes the oxi-dation of non-phenolic aromatic rings into aryl cation radicals by H2O2. Aryl cation radicals are unstable and undergo various subsequent reactions. A typical exam-ple is the oxidation of veratryl alcohol (3,4-dimethoxybenzyl alcohol) into veratryl aldehyde (3,4-dimethoxybenzyl aldehyde) via the intermediary formation of veratryl cation and benzyl radicals.
Veratryl alcohol + H2O2 → Veratraldehyde + 2 H2O
Optimal reaction with Mn(II) at pH 4.5, with veratryl alcohol at pH 3.0, Temperature range 15 - 50 °C.
Mn(II), Veratryl alcohol
Karimi et al. (2009) Color remediation of chemimechanical pulping effluent using combination of enzymatic treatment and Fenton reaction. Desalination 249 (2):870.
Schachschal et al. (2011) Encapsulation of enzymes in microgels by polymerization/cross-linking in aqueous droplets. Colloid and Polymer Science 289:693.