Transformation of N′, N′-dimethyl-N -(hydroxyphenyl) ureas by laccase from the white rot fungus Trametes versicolor - Archive ouverte HAL Access content directly
Journal Articles Applied Microbiology and Biotechnology Year : 1999

Transformation of N′, N′-dimethyl-N -(hydroxyphenyl) ureas by laccase from the white rot fungus Trametes versicolor

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Abstract

Transformation of N′,N′-dimethyl-N-(hydroxyphenyl)ureas was assayed in the presence of purified laccase produced by the fungus Trametes versicolor. The para- and ortho-hydroxyphenyl derivatives were enzymatically transformed, whereas the meta derivative was not. The performance of laccase-mediated transformation depended on the pH, with an optimum for the para-derivative degradation rate at pH 5. The pH also influenced the nature of the reaction products. The chemical was exclusively oxidised into p-benzoquinone at pH 3 and into mainly N′,N′-dimethyl-N-[(2,5-cyclohexadiene-1-one)-4-ylidene]urea at pH 6. The ortho- derivative was transformed essentially into insoluble purple compounds, probably appearing as polymers resulting from coupling of the parent compound.
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Dates and versions

hal-02697804 , version 1 (12-01-2023)
hal-02697804 , version 2 (13-01-2023)

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Claude Jolivalt, A. Raynal, Eliane Caminade, B. Kokel, F. Le Goffic, et al.. Transformation of N′, N′-dimethyl-N -(hydroxyphenyl) ureas by laccase from the white rot fungus Trametes versicolor. Applied Microbiology and Biotechnology, 1999, 51 (5), pp.676-681. ⟨10.1007/s002530051451⟩. ⟨hal-02697804v2⟩
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