Results 141 to 150 of about 5,798,291 (185)
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Catalytic activity of laccase hosted in reversed micelles
Journal of Bioscience and Bioengineering, 2001Nanostructured reversed micelles induce a high laccase activity in organic solvents, because enzymes can maintain their highly dimensional structure in water pools of reversed micelles [RMs]. Laccase attracts considerable attention as a novel industrial enzyme due to its high capability to catalyze the oxidation of aromatic compounds.
J, Michizoe, M, Goto, S, Furusaki
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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 ...
Palmieri G +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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Journal of Biochemical and Biophysical Methods, 2000
The reactions between Laccase (extracted from China lacquer of Rhus vernicifera) and various substrates (3,4-Dihydroxybenzaldehyde, Guaiacol, Pyrogallol, Gallic acid) have been studied using LKB-2107 batch microcalorimetry system. Based on calorimetry, a new method has been proposed. Laccase activity and the Michaelis constant K(m) have been determined
T, Wang +4 more
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The reactions between Laccase (extracted from China lacquer of Rhus vernicifera) and various substrates (3,4-Dihydroxybenzaldehyde, Guaiacol, Pyrogallol, Gallic acid) have been studied using LKB-2107 batch microcalorimetry system. Based on calorimetry, a new method has been proposed. Laccase activity and the Michaelis constant K(m) have been determined
T, Wang +4 more
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Protein production and laccase activity in A. bisporus
Biotechnology Letters, 1982Correlations between laccase activity and some growth parameters of A. bisporus cultivation are reported. “In vivo” regulation of laccase activity by means of ferulic acid and chlorogenic acid and its relationship with growth parameters are pointed out; the effects of the treatments on carpophore production are preliminary evaluated.
G. Giovannozzi-Sermanni +2 more
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Factors affecting the activation of pulps with laccase
Enzyme and Microbial Technology, 2010Activation of fibres by radical formation is the first step when aiming at oxidative coupling of new functional groups on the fibre bound lignin. In this work, factors affecting the amount of phenoxy radicals created to unbleached TMP, CTMP, softwood kraft and hardwood kraft pulp fibres in the laccase catalysed oxidation were determined by EPR. Laccase
Oksanen, Tarja +6 more
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