Laccases: structure, reactions, distribution

Claus, H.

doi:10.1016/j.micron.2003.10.029

Cited by 595 publications

(333 citation statements)

References 20 publications

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“…The function of laccase is dependent on Cu atoms that are arranged in four sets (Enguita et al 2003). These four Cu atoms, having different electron paramagnetic resonance (EPR) signals, exhibit three redox sites, namely Cu I, II, and III, which play a crucial role in the reaction mechanism (Claus 2004). Cu I is an oxidized form that is EPR detectible and emits a blue color at 600 nm (Bertrand et al 2002;Enguita et al 2003).…”

Section: Molecular Structurementioning

confidence: 99%

“…The laccase catalysis mechanism involves three major reaction steps. Initially, Cu I is reduced by a reducing substrate and oxidizes itself (Claus 2004;Kunamneni et al 2008a). The electron generated at Cu I is transferred internally to Cu II, then to Cu III; these three atoms are arranged in a triangular structure relative to each other (Bertrand et al 2002;Claus 2004).…”

Section: Reaction Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Laccase, an Emerging Tool to Fabricate Green Composites: A Review

Mahmood¹,

Hashim²,

Sulaiman³

et al. 2015

BioResources

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In the last two decades, laccases have received much attention from researchers because of their specific ability to oxidize lignin. This function of laccase is very useful for applications in several biotechnological processes, including delignification in the pulp and paper industry and the detoxification of industrial effluents from the textile and petrochemical industries. This review focuses on laccase-mediated fiberboard synthesis. Growing concerns regarding the emission of formaldehyde from wood composites has prompted industrialists to consider the fabrication of green composites. Laccase-mediated fiber treatments oxidize the lignin component without affecting the cellulose structure. As a result, free radicals are generated on the fiber surface, and these can act as potential reactive sites for further cross-linking reactions in board manufacturing. Binderless fiberboards prepared using such methods can be considered as green composites because the manufacturing process involves no additional resin.

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Section: Molecular Structurementioning

confidence: 99%

Section: Reaction Mechanismmentioning

confidence: 99%

Laccase, an Emerging Tool to Fabricate Green Composites: A Review

Mahmood¹,

Hashim²,

Sulaiman³

et al. 2015

BioResources

View full text Add to dashboard Cite

show abstract

“…T2 and T3 copper form a trinuclear cluster, where reduction of molecular oxygen and release of water take place. The oxidation of substrates (p-diphenols) creates reactive radicals that can undergo nonenzymatic reactions like cross-linking of monomers, degradation of polymers and ring cleavage of aromatic compounds (Claus, 2003;2004) (Fig. 2).…”

Section: Distribution Structure and Mechanisms Of Laccase 2 Distribmentioning

confidence: 99%

Laccase Application for Upgrading of Lignocellulose Fibers

Gabrič

Pohleven

2015

Drvna ind.

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“…This research summarizes the distribution of laccases among bacteria, and able to producing maximum laccases at the most favorable conditions. form multimeric complexes (Claus, 2004;Sakurai, 2007). In recent years, bacterial laccases have gained higher concentration for their potential in biodegrading environmentally significant phenolic pollutants due to their relatively elevated production rate, high thermostability, and broad pH range, among others (Held, 2005;Hilden, 2009).…”

Section: Introductionmentioning

confidence: 99%