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- W2083486185 abstract "The pyrethroid pesticides residues on foods and environmental contamination are a public safety concern. Pretreatment with pyrethroid hydrolase has the potential to alleviate the conditions. For this purpose, a fungus capable of using pyrethroid pesticides as a sole carbon source was isolated from the soil and characterized as Aspergillus niger ZD11. A novel pyrethroid hydrolase from cell extract was purified 41.5-fold to apparent homogeneity with 12.6% overall recovery. It is a monomeric structure with a molecular mass of 56 kDa, a pI of 5.4, and the enzyme activity was optimal at 45 °C and pH 6.5. The activities were strongly inhibited by Hg2+, Ag+, and ρ-chloromercuribenzoate, whereas less pronounced effects (5−10% inhibition) were observed in the presence of the remaining divalent cations, the chelating agent EDTA and phenanthroline. The purified enzyme hydrolyzed various insecticides with similar carboxylester. trans-Permethrin is the preferred substrate. Keywords: Pyrethroid insecticides; pyrethroid hydrolase; purification; Aspergillus niger ZD11; degradation" @default.
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- W2083486185 date "2005-08-19" @default.
- W2083486185 modified "2023-10-11" @default.
- W2083486185 title "Purification and Characterization of a Novel Pyrethroid Hydrolase from<i> Aspergillus niger</i> ZD11" @default.
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- W2083486185 doi "https://doi.org/10.1021/jf051460k" @default.
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