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Purification and characterization of extracellular laccase produced by Ceriporiopsis subvermispora and decolorization of triphenylmethane dyes
Author(s) -
Chmelová Daniela,
Ondrejovič Miroslav
Publication year - 2016
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.201600152
Subject(s) - triphenylmethane , laccase , bromophenol blue , chemistry , malachite green , biodegradation , metal ions in aqueous solution , abts , phenol red , nuclear chemistry , organic chemistry , chromatography , enzyme , metal , adsorption , antioxidant , dpph
Laccases of white‐rot fungi provide a promising future as a tool to be used in the field of biodegradation of synthetic dyes with different chemical structures. The aim of this study was production, characterization, and application of laccases from the white‐rot fungus Ceriporiopsis subvermispora ATCC 90467 for decolorization of triphenylmethane dyes that could remain persistent in wastewater. Laccase was purified from a C. subvermispora culture by a four‐step method resulting high specific activity of 2,571 U g −1 , 88‐fold higher than crude laccase. Purified laccase (molecular weight 45 kDa) had the optimum activity at pH 2.0 and the optimum temperature 50 °C using ABTS as chromogenic substrate. Laccases efficiently decolorized triphenylmethane dyes such as Malachite Green (87.8%), Bromocresol Purple (71.6%), and Methyl Violet (68.1%) without redox mediator. However, decolorization percentage of hardly degradable triphenylmethane dyes such as Phenol Red, Bromophenol Blue, and Brilliant Blue R‐250 was increased the presence of some low‐molecular weight compounds (natural or synthetic redox mediators). Purified laccases were resistant to Mg 2+ , Ca 2+ , Ba 2+ , Mn 2+ , Fe 2+ , Cu 2+ , Zn 2+ , and Sn 2+ (10 mmol L −1 ). These findings suggest that laccases from C. subvermispora are able to decolorize triphenylmethane dyes without the negative influence of metal ions that can be found in wastewater.