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Activity and stability of laccase in conjugation with chitosan
International Journal of Biological Macromolecules, 2005Laccase is one of a few enzymes that can directly reduce oxygen into water under ambient conditions, while oxidizing a variety of aromatic compounds. Its conjugation with chitosan generates a pH-sensitive functional biomaterial that changes its solubility in response to pH variation.
Gary, Delanoy, Qing, Li, Jian, Yu
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Chemical Engineering Journal, 2015 Laccase was immobilized on a novel conductive polyvinyl alcohol (PVA)/chitosan (CS)/multi-walled carbon nanotubes (MWNTs) composite nanofibrous membrane. Its stabilities and catalytic activity for diclofenac degradation were comprehensively investigated.
Fengting Li, Bingru Zhang
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Laccase activity in soils: Considerations for the measurement of enzyme activity
Chemosphere, 2012Laccases (benzenediol: oxygen oxidoreductases, EC 1.10.3.2) are copper-containing enzymes that catalyze the oxidative conversion of a variety of chemicals, such as mono-, oligo-, and polyphenols and aromatic amines. Laccases have been proposed to participate in the transformation of organic matter and xenobiotics as well as microbial interactions ...
Ivana, Eichlerová +2 more
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International Microbiology, 2022
Laccases are enzymes produced by plants and white rot fungi, such as Pleurotus ostreatus, with industrial applications. Fungal laccases have been widely studied, and investigations, such as those involving recombinant DNA technology or adding inducers, have been made to increase laccase production.
Arcadio Cruz-Vázquez +4 more
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Laccases are enzymes produced by plants and white rot fungi, such as Pleurotus ostreatus, with industrial applications. Fungal laccases have been widely studied, and investigations, such as those involving recombinant DNA technology or adding inducers, have been made to increase laccase production.
Arcadio Cruz-Vázquez +4 more
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Screening Metagenomic Libraries for Laccase Activities
2010Laccases are multi-copper oxidoreductases (benzenediol:oxygen oxidoreductases, EC 1.10.3.2) able to oxidise a wide variety of phenolic and non-phenolic compounds. They are useful enzymes for a variety of applications, including bioremediation and craft pulp bio-bleaching as the most significant ones.
Manuel, Ferrer +2 more
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Activation of laccase by penicillin and derivatives
Process Biochemistry, 2006Abstract Capable of oxidizing a wide range of reducing substances, laccase has a great potential for various biocatalytic applications. Extensive research effort is being made for improving laccase's activity, specificity, and stability. We observed that pre-incubating with penicillin led to a significant activation of a Rhizoctonia solani laccase,
Darron Ransbarger, Feng Xu
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Metal-activated laccase promoters
2002Production of laccase isoenzymes POXC and POXAlb in the white rot basidiomycete Pleurotus ostreatus is induced by copper at the level of gene transcription, poxc and poxalb promoter regions, extending 200 nucleotides upstream of the ATG, contain multiple putative metal responsive elements (MREs) similar to the core MRE consensus sequence identified in ...
FARACO, VINCENZA +3 more
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Optimization of a Small Laccase by Active‐Site Redesign
ChemBioChem, 2013Small but faster: A small laccase from Streptomyces coelicolor (SLAC) has been engineered by structure-based design and site-directed mutagenesis to improve the activity on commercially relevant substrates. The variants generated showed up to 40-fold increased efficiency on 2,6-dimethoxyphenol and the ability to use mediators with considerably higher ...
Miguel D, Toscano +3 more
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Laccase activity of forest litter
Soil Biology and Biochemistry, 1999Abstract Laccases are blue-copper enzymatic proteins involved in the transformation of polyphenolic compounds, such as lignin, into forest litter. A method to measure their activity was developed using an evergreen oak litter as a model system. We considered factors that affect the extraction of these enzymes and the measurement of their activity ...
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Impact of enological tannins on laccase activity
2021Los taninos enológicos se utilizan habitualmente en la elaboración del vino por diversos motivos (Versari et al., 2013; Vignault et al., 2018), entre los que destacan su acción inhibitoria de la actividad lacasa en las vendimias afectadas por la podredumbre gris y la protección del color del vino frente al pardeamiento. No obstante, hasta hace muy poco
Vignault, Adeline +9 more
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