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dc.contributor.authorKojima, Yuka
dc.contributor.authorVarnai, Aniko
dc.contributor.authorIshida, Takuya
dc.contributor.authorSunagawa, Naoki
dc.contributor.authorPetrovic, Dejan
dc.contributor.authorIgarashi, Kiyohiko
dc.contributor.authorJellison, Jody
dc.contributor.authorGoodell, Barry
dc.contributor.authorAlfredsen, Gry
dc.contributor.authorWestereng, Bjørge
dc.contributor.authorEijsink, Vincentius Gerardus Henricus
dc.contributor.authorYoshida, Makoto
dc.identifier.citationZhang, Z., Lee, Y., Sivertsen, A., Skjeseth, G., Haugslien, S., Clarke, J. L., ... & Blystad, D. R. (2016). Low Temperature Treatment Affects Concentration and Distribution of Chrysanthemum Stunt Viroid in Argyranthemum. Frontiers in microbiology, 7, 224.nb_NO
dc.description.abstractFungi secrete a set of glycoside hydrolases and lytic polysaccharide monooxygenases (LPMOs) to degrade plant polysaccharides. Brown-rot fungi, such as Gloeophyllum trabeum, tend to have few LPMOs, and information on these enzymes is scarce. The genome of G. trabeum encodes four auxiliary activity 9 (AA9) LPMOs (GtLPMO9s), whose coding sequences were amplified from cDNA. Due to alternative splicing, two variants of GtLPMO9A seem to be produced, a single-domain variant, GtLPMO9A-1, and a longer variant, GtLPMO9A-2, which contains a C-terminal domain comprising approximately 55 residues without a predicted function. We have overexpressed the phylogenetically distinct GtLPMO9A-2 in Pichia pastoris and investigated its properties. Standard analyses using high-performance anion-exchange chromatography–pulsed amperometric detection (HPAEC-PAD) and mass spectrometry (MS) showed that GtLPMO9A-2 is active on cellulose, carboxymethyl cellulose, and xyloglucan. Importantly, compared to other known xyloglucan-active LPMOs, GtLPMO9A-2 has broad specificity, cleaving at any position along the β-glucan backbone of xyloglucan, regardless of substitutions. Using dynamic viscosity measurements to compare the hemicellulolytic action of GtLPMO9A-2 to that of a well-characterized hemicellulolytic LPMO, NcLPMO9C from Neurospora crassa revealed that GtLPMO9A-2 is more efficient in depolymerizing xyloglucan. These measurements also revealed minor activity on glucomannan that could not be detected by the analysis of soluble products by HPAEC-PAD and MS and that was lower than the activity of NcLPMO9C. Experiments with copolymeric substrates showed an inhibitory effect of hemicellulose coating on cellulolytic LPMO activity and did not reveal additional activities of GtLPMO9A-2. These results provide insight into the LPMO potential of G. trabeum and provide a novel sensitive method, a measurement of dynamic viscosity, for monitoring LPMO activity.nb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleKojima, Y., Várnai, A., Ishida, T., Sunagawa, N., Petrovic, D. M., Igarashi, K., ... & Eijsink, V. G. (2016). A lytic polysaccharide monooxygenase with broad xyloglucan specificity from the brown-rot fungus Gloeophyllum trabeum and its action on cellulose-xyloglucan complexes. Applied and environmental microbiology, 82(22), 6557-6572.nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.rights.holderCopyright © 2016 Kojima et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.nb_NO
dc.source.journalApplied and Environmental Microbiologynb_NO

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal