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Copper-induced Production of Laccases for Lignin Depolymerisation and Micropollutant Degradation by Laccase-mediator Systems

Chimia, 2021-12, Vol.75 (12), p.1058-1065 [Peer Reviewed Journal]

ISSN: 0009-4293 ;EISSN: 2673-2424 ;DOI: 10.2533/chimia.2021.1058 ;PMID: 34920781

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  • Title:
    Copper-induced Production of Laccases for Lignin Depolymerisation and Micropollutant Degradation by Laccase-mediator Systems
  • Author: Pillet, Lauriane ; Dufresne, Remy ; Crelier, Simon
  • Subjects: Biocatalysis ; Copper ; Fungi - enzymology ; Laccase - biosynthesis ; Laccase Mediators ; Lignin ; Lignin Depolymerisation ; Micropollutant Degradation
  • Is Part Of: Chimia, 2021-12, Vol.75 (12), p.1058-1065
  • Description: Contaminants deriving from human activities represent a constantly growing threat to our environment and have a direct impact on plant and animal health. To alleviate this ecological imbalance, biocatalysis offers a green and sustainable alternative to conventional chemical processes. Due to their broad specificity, laccases are enzymes possessing excellent potential for synthetic biotransformations in various fields as well as for the degradation of organic contaminants. Herein, we produced laccases in submerged cultures of P. ostreatus and T. versicolor in three different media. The fungi/medium combination leading to the highest enzymatic activity was malt extract (2%) + yeast extract (3%) + glucose (0.8%). Laccase production was further increased by supplementing this medium with different concentrations of Cu2+, which also provided a better understanding of the induction effect. Additionally, we disclose preliminary results on the interaction of laccases with mediators (ABTS and violuric acid - VA) for two main applications: lignin depolymerisation with guaiacylglycerol-β-guaiacyl ether (GBG) as lignin model and micropollutant degradation with Remazol Brilliant Blue (RBB) as enzymatic bioremediation model. Promising results were achieved using VA to increase depolymerization of GBG dimer and to enhance RBB decolorisation.
  • Publisher: Switzerland: Swiss Chemical Society
  • Language: English;German
  • Identifier: ISSN: 0009-4293
    EISSN: 2673-2424
    DOI: 10.2533/chimia.2021.1058
    PMID: 34920781
  • Source: TestCollectionTL3OpenAccess
    MEDLINE
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