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Article

Inhibition of Phenolics Uptake by Ligninolytic Fungal Cells and Its Potential as a Tool for the Production of Lignin-Derived Aromatic Building Blocks

1
AgroParisTech, CEBB, URD Agro-Biotechnologies Industrielles (ABI), 51110 Pomacle, France
2
TIMR (Integrated Transformations of Renewable Matter), ESCOM, Centre de Recherche Royallieu, Université de Technologie de Compiègne, CS 60 319, 60203 Compiègne, France
*
Author to whom correspondence should be addressed.
J. Fungi 2020, 6(4), 362; https://doi.org/10.3390/jof6040362
Received: 1 November 2020 / Revised: 4 December 2020 / Accepted: 7 December 2020 / Published: 12 December 2020
(This article belongs to the Special Issue Exploiting Fungal Solutions for Today's Challenges)
Lignin is the principal natural source of phenolics but its structural complexity and variability make it difficult to valorize through chemical depolymerization approaches. White rots are one of the rare groups of organisms that are able to degrade lignin in ecosystems. This biodegradation starts through extracellular enzymes producing oxidizing agents to depolymerize lignin and continue with the uptake of the generated oligomers by fungal cells for further degradation. Phanerochaete chrysosporium is one of the most studied species for the elucidation of these biodegradation mechanisms. Although the extracellular depolymerization step appears interesting for phenolics production from lignin, the uptake and intracellular degradation of oligomers occurring in the course of the depolymerization limits its potential. In this study, we aimed at inhibiting the phenolics uptake mechanism through metabolic inhibitors to favor extracellular oligomers accumulation without preventing the ligninases production that is necessary for extracellular depolymerization. The use of sodium azide confirmed that an active transportation phenomenon is involved in the phenolics uptake in P. chrysosporium. A protocol based on carbonyl cyanide m-chlorophenyl hydrazone enabled reaching 85% inhibition for vanillin uptake. This protocol was shown not to inhibit, but on the contrary, to stimulate the depolymerization of both dehydrogenation polymers (DHPs) and industrial purified lignins. View Full-Text
Keywords: biomass valorization; carbonyl cyanide m-chlorophenyl hydrazine; lignin; monoaromatics; monophenols; Phanerochaete chrysosporium biomass valorization; carbonyl cyanide m-chlorophenyl hydrazine; lignin; monoaromatics; monophenols; Phanerochaete chrysosporium
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MDPI and ACS Style

Leriche-Grandchamp, M.; Flourat, A.; Shen, H.; Picard, F.; Giordana, H.; Allais, F.; Fayeulle, A. Inhibition of Phenolics Uptake by Ligninolytic Fungal Cells and Its Potential as a Tool for the Production of Lignin-Derived Aromatic Building Blocks. J. Fungi 2020, 6, 362. https://doi.org/10.3390/jof6040362

AMA Style

Leriche-Grandchamp M, Flourat A, Shen H, Picard F, Giordana H, Allais F, Fayeulle A. Inhibition of Phenolics Uptake by Ligninolytic Fungal Cells and Its Potential as a Tool for the Production of Lignin-Derived Aromatic Building Blocks. Journal of Fungi. 2020; 6(4):362. https://doi.org/10.3390/jof6040362

Chicago/Turabian Style

Leriche-Grandchamp, Mathilde, Amandine Flourat, Hangchen Shen, Flavien Picard, Heloïse Giordana, Florent Allais, and Antoine Fayeulle. 2020. "Inhibition of Phenolics Uptake by Ligninolytic Fungal Cells and Its Potential as a Tool for the Production of Lignin-Derived Aromatic Building Blocks" Journal of Fungi 6, no. 4: 362. https://doi.org/10.3390/jof6040362

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