Enzymes of white-rot fungi involved in lignin degradation and ecological determinants for wood decay

Tuor, U.; Winterhalter, Kaspar H.; Fiechter, Armin

doi:10.1016/0168-1656(95)00042-o

Cited by 243 publications

(140 citation statements)

References 75 publications

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“…Endoglu-cases attack amorphous regions within the crystalline microstructure, thereby creating new foci for attack by exo-cellobiohydrolases. Cellobiose dimers are cleaved by β-glucosidases to yield glucose monomers, which can now be transported across the membrane to participate in energy generating metabolic reactions Fillingham et al 1999;Tuor et al 1995). Therefore, hemicellulose degradation is required before efficient lignin removal can commence.…”

Section: Ligninmentioning

confidence: 99%

Lignocellulose biodegradation: Fundamentals and applications

Malherbe

Cloete

2002

Rev Environ Sci Biotechnol

405

163

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Section: Ligninmentioning

confidence: 99%

Lignocellulose biodegradation: Fundamentals and applications

Malherbe

Cloete

2002

Rev Environ Sci Biotechnol

405

163

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“…However, many white-rot fungi, including a number of aggressive lignin degraders, seem to operate without expressing LiP activity [11][12][13]. Laccase (EC 1.10.3.2) is another phenoloxidase that white-rot fungi often produce in conjunction with LiP, MnP or both [14,15]. However, the role played by laccase in lignin degradation has remained obscure since the low redox potential of this enzyme appeared to make it incapable of oxidizing non-phenolic lignin constituents [16].…”

Section: Introductionmentioning

confidence: 99%

A fungal metabolite mediates degradation of non‐phenolic lignin structures and synthetic lignin by laccase

et al. 1996

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Lignin peroxidase is generally considered to be a primary catalyst for oxidative depolymerization of fignin by white-rot fungi. However, some white-rot fungi lack lignin peroxidase. Instead, many produce laccase, even though the redox potentials of known laccases are too low to directly oxidize the non-phenolic components of lignin. Pycnoporus cinnabarinus is one example of a laccase-producing fungus that degrades lignin very efficiently. To overcome the redox potential barrier, P.cinnabarinus produces a metabolite, 3-hydroxyanthranilate that can mediate the oxidation of nowphenolic substrates by laccase. This is the first description of how laccase might function in a biological system for the complete depolymerization of lignin.

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“…These results were obtained with 10% "liquid inoculum" after two harvests and proved higher than those reported in the literature (ORTEGA et al, 1992;BONATTI, 2001). According to Tuor et al (1995), the higher or lower degradation of these components depends on the substrate supplementation, the fungal species, and the environmental conditions used for the cultivation.…”

Section: Resultsmentioning

confidence: 99%