2010
DOI: 10.1016/j.enzmictec.2009.11.006
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Linoleic acid peroxidation and lignin degradation by enzymes produced by Ceriporiopsis subvermispora grown on wood or in submerged liquid cultures

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Cited by 24 publications
(23 citation statements)
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“…However, currently known phenolic mediator systems oxidize lignin model compounds in very low yields (47), so their diastereoselectivity cannot be tested. (iii) A manganese peroxidase generates ligninolytic oxidants from unsaturated lipids (21,(48)(49)(50)(51). Although this system cleaves both synthetic lignin and lignin model compounds, the proximal oxidants that are responsible have not yet been identified (52), and whether they show diastereoselectivity on lignin remains unclear.…”
Section: Resultsmentioning
confidence: 99%
“…However, currently known phenolic mediator systems oxidize lignin model compounds in very low yields (47), so their diastereoselectivity cannot be tested. (iii) A manganese peroxidase generates ligninolytic oxidants from unsaturated lipids (21,(48)(49)(50)(51). Although this system cleaves both synthetic lignin and lignin model compounds, the proximal oxidants that are responsible have not yet been identified (52), and whether they show diastereoselectivity on lignin remains unclear.…”
Section: Resultsmentioning
confidence: 99%
“…A reação de peroxidação é ainda mais intensa quando conduzida na presença de íons Mn 2+ . 35 Com base nesses resultados, 35,60 tem sido proposto que a lacase pode atuar como se fosse uma MnP por meio de uma reação em cascata que envolveria a oxidação inicial do ácido 4-hidroxi-benzoico a radical fenoxila; oxidação de Mn 2+ a Mn 3+ por redução do radical fenoxila; oxidação do ácido linoleico por Mn 3+ e, peroxidação final do ácido linoleico.…”
Section: áCido Oxálico Mnp E As Reações De Peroxidação De áCidos Graunclassified
“…105 Por outro lado, reações similares iniciadas por MnP também solubilizaram quantidades expressivas de lignina. 60 A comparação dos sistemas enzimático (baseado na MnP) e biomiméticos (baseados na redução de Fe 3+ ) mostrou que as enzimas foram cerca de 10 vezes mais eficientes para degradar lignina, sugerindo que os sistemas biomiméticos destinados à degradação de lignina ainda demandam aprimoramentos para atingir eficiência compatível com a aplicação industrial, por exemplo, no branqueamento de polpas celulósicas.…”
Section: Degradação De Materiais Lignocelulósicos Por Enzimas Sistemunclassified
“…Azure B is a recalcitrant dye that is degraded by lignin peroxidase (LiP) but not by MnP. On the other hand, MnP is the main oxidative enzyme detected in cultures of C. subvermispora on wood (Aguiar and Ferraz, 2008;2012;Cunha et al, 2010). In the present study, aqueous extracts recovered from Pinus taeda biotreated with C. subvermispora were evaluated for the Fe 3þ -and Cu 2þ -reducing activities and for their ability to assist the decolorization of Azure B during Fenton-like reactions.…”
Section: Introductionmentioning
confidence: 99%
“…This is a relevant subject because C. subvermispora is one of the most promising biopulping fungi owing to its selectivity for lignin degradation where Fenton reaction seems to be avoided (Enoki et al, 2002;Aguiar et al, 2006). A number of studies have attributed lipid peroxidation initiated by manganese peroxidase (MnP) as the main source of free radicals used by this fungus to initiate lignin degradation (Kapich et al, 1999;Cunha et al, 2010). Several metallic ions and OH radicals can also initiate lipid peroxidation (Spiteller, 2006).…”
Section: Introductionmentioning
confidence: 99%