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锰过氧化物酶(MnP,EC 1.11.1.13)是真菌分泌的一种含亚铁血红素的糖基化胞外蛋白,主要存在于白腐菌和土壤枯草菌等担子菌中,属于木质素降解酶系,能有效降解木质素以及废水、环境中的多种抗性物质(如腐殖质酸和多环芳烃等有机污染物);该酶在Mn²⁺存在下催化底物二甲氧基苯酚(DMP)氧化,生成在470 nm处具有特征吸收峰的产物,通过监测该产物在470 nm处的生成速率即可计算MnP活性。
Manganese peroxidase (MnP, EC 1.11.1.13) is a heme-containing glycosylated extracellular protein secreted by fungi. It is mainly found in basidiomycetes such as white-rot fungi and Bacillus subtilis in soil, and belongs to the lignin-degrading enzyme system. MnP can effectively degrade lignin as well as various recalcitrant substances in wastewater and the environment, including humic acids and polycyclic aromatic hydrocarbons (PAHs). In the presence of Mn²⁺, this enzyme catalyzes the oxidation of the substrate dimethoxyphenol (DMP) to generate a product with a characteristic absorption peak at 470 nm. The MnP activity can be calculated by monitoring the rate of formation of this product at 470 nm.