Oxidative dechlorination of methoxychlor by ligninolytic enzymes from white-rot fungi.
Ligninolytic enzymes, manganese peroxidase (MnP), laccase, and lignin peroxidase (LiP), from white-rot fungi were used in an attempt to treat methoxychlor (MC), a chemical widely used as a pesticide. MnP and laccase in the presence of Tween 80 and 1-hydroxybenzotriazole (HBT), respectively, and LiP were found to degrade MC, and MnP-Tween 80 decreased MC levels by about 65% after a 24-h treatment. MC was converted into methoxychlor olefin (MCO) and 4,4'-dimethoxybenzophenone by MnP-Tween 80 or laccase-HBT treatment. These results indicate that ligninolytic enzymes from white-rot fungi can catalyze the oxidative dechlorination of MC. Moreover, a metabolite MCO was also degraded by MnP-Tween 80 or laccase-HBT treatment.
Department of Forest Resources Science, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan.
Hirofumi
H
Hirai
Sawako
S
Nakanishi
Tomoaki
T
Nishida
D008401:Gas Chromatography-Mass Spectrometry; D042845:Laccase / Q000378:metabolism*; D008731:Methoxychlor / Q000378:metabolism*; D010544:Peroxidases / Q000378:metabolism*; D020075:Phanerochaete / Q000201:enzymology*
D042845:Laccase; D010544:Peroxidases; C042858:lignin peroxidase; C051129:manganese peroxidase; D008731:Methoxychlor