On the role of natural mediators in oxidoreductase catalysed degradation of lignocellulosic materials: A Study on lignin model compounds

Paula Annukka Nousiainen, Anu Rainio, Jussi Kontro, Johanna Rytioja, Johanna Rytioja, Eva Uzan, Annele Hatakka, Taina Lundell, Anne Lomascolo, Jussi Sipilä

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKonferenssiartikkeliTieteellinenvertaisarvioitu


It has recently been found that some natural compounds derived from syringyl-type plant phenolics are good substrates for laccases, and they seem to be able to effectively mediate electron transfer between the oxidized laccase and target substrates. We have now further examined these mediator assisted oxidative reactions using various monomeric, dimeric and oligomeric synthetic lignin model compounds expressing comparable high oxidation potentials, such as 4-O methylated derivatives of vanillyl alcohol, guaiacylglycerol β-guaiacyl ethers, and investigated their reactions with various laccases possessing wide range of oxidation potentials. The results were compared to those obtained by common mediators, 1-hydroxybenzotriazole (HBT) and N-hydroxyacetanilide (NHA). The results suggest that in addition to oxidation potentials of reacting species, at least pH of the medium, the steric bulk in the target substrate and the chemical stability of the mediator seem to play important role in oxidoreductase catalysed reactions studied.
OtsikkoThe 11th European Workshop on Lignosellulosics and Pulp 2010
TilaJulkaistu - 2010
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaThe 11th European Workshop on Lignosellulosics and Pulp 2010 - Hamburg, Saksa
Kesto: 16 elok. 201019 elok. 2015

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