Action of lytic polysaccharide monooxygenase on plant tissue is governed by cellular type

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作者
Brigitte Chabbert
Anouck Habrant
Mickaël Herbaut
Laurence Foulon
Véronique Aguié-Béghin
Sona Garajova
Sacha Grisel
Chloé Bennati-Granier
Isabelle Gimbert-Herpoël
Frédéric Jamme
Matthieu Réfrégiers
Christophe Sandt
Jean-Guy Berrin
Gabriel Paës
机构
[1] University of Reims Champagne-Ardenne,FARE Laboratory, INRA
[2] BBF,undefined
[3] INRA,undefined
[4] Aix Marseille University,undefined
[5] Polytech’Marseille,undefined
[6] Synchrotron SOLEIL,undefined
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摘要
Lignocellulosic biomass bioconversion is hampered by the structural and chemical complexity of the network created by cellulose, hemicellulose and lignin. Biological conversion of lignocellulose involves synergistic action of a large array of enzymes including the recently discovered lytic polysaccharide monooxygenases (LPMOs) that perform oxidative cleavage of cellulose. Using in situ imaging by synchrotron UV fluorescence, we have shown that the addition of AA9 LPMO (from Podospora anserina) to cellulases cocktail improves the progression of enzymes in delignified Miscanthus x giganteus as observed at tissular levels. In situ chemical monitoring of cell wall modifications performed by synchrotron infrared spectroscopy during enzymatic hydrolysis demonstrated that the boosting effect of the AA9 LPMO was dependent on the cellular type indicating contrasted recalcitrance levels in plant tissues. Our study provides a useful strategy for investigating enzyme dynamics and activity in plant cell wall to improve enzymatic cocktails aimed at expanding lignocelluloses biorefinery.
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