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Pre-treatment of cellulose by cellobiose dehydrogenase increases the degradation rate by hydrolytic cellulases
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
2007 (English)In: Cellulose Chemistry and Technology, ISSN 0576-9787, Vol. 41, no 2-3, 105-111 p.Article in journal (Refereed) Published
Abstract [en]

Cellobiose dehydrogenase (CDH) is an extra-cellular flavocytochrome with unknown biological function, produced by various wood degrading fungi. In the presence of Fe(III) and cellobiose, CDH produces hydroxyl radicals through a Fenton-type reaction. Treatment of cellulose with CDH, cellobiose, hydrogen peroxide and ferriacetate decreased cellulose's polymerization degree and increased its degradability for different functional types of hydrolytic cellulases, except for an exo-enzyme working from the reducing end. This suggests a biological role for CDH in fungal cellulose degradation, possibly by activating the cellulose for hydrolytic cellulases by depolymerization and disturbance of the hydrogen bonding pattern in cellulose.

Place, publisher, year, edition, pages
2007. Vol. 41, no 2-3, 105-111 p.
Keyword [en]
synergism, cellulase, cellulose biodegradation, cellobiose, dehydrogenase, Fenton reaction, wood-degrading enzyme, white-rot fungus, phanerochaete-chrysosporium, cellobiohydrolase-i, quinone oxidoreductase, trichoderma-reesei, oxidase, purification, synergism, glucose
Identifiers
URN: urn:nbn:se:kth:diva-17237ISI: 000255932900003Scopus ID: 2-s2.0-43949107540OAI: oai:DiVA.org:kth-17237DiVA: diva2:335280
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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