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Oxidative cellulose degradation by cellobiose dehydrogenase from Phanerochaete chrysosporium: A model compound study
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
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2005 (English)In: Holzforschung, ISSN 0018-3830, Vol. 59, no 3, 263-268 p.Article in journal (Refereed) Published
Abstract [en]

Cellobiose dehydrogenase (CDH) is an extracellular enzyme produced by various wood-degrading fungi. It oxidizes cellobiose to cellobionolactone under reduction of molecular oxygen to hydrogen peroxide, and Fe3+ to Fe2+. These activated agents can thereafter form highly reactive hydroxyl radicals, which depolymerize wood polymers. In this work, cellulose depolymerization by CDH was studied using a model compound, methyl beta-D-glucopyranoside. The formation of glucose, arabinose, gluconic acid, erythrulose and formaldehyde were detected and a mechanism for the reaction is proposed. The biological importance of this enzyme-initiated reaction is discussed.

Place, publisher, year, edition, pages
2005. Vol. 59, no 3, 263-268 p.
Keyword [en]
cellobiose dehydrogenase, cellulose biodegradation, hydroxyl radical, methyl beta-D-glucopyranoside, white-rot fungus, sporotrichum-pulverulentum, quinone oxidoreductase, degrading enzyme, oxidase, delignification, purification, cellulases, mechanism, lignin
Identifiers
URN: urn:nbn:se:kth:diva-14719DOI: 10.1515/HF.2005.043ISI: 000228828800002Scopus ID: 2-s2.0-21844471271OAI: oai:DiVA.org:kth-14719DiVA: diva2:332760
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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