Depolymerization and conversion of lignin to value-added bioproducts by microbial and enzymatic catalysis

Lignin, the most abundant renewable aromatic compound in nature, is an excellent feedstock for value-added bioproducts manufacturing; while the intrinsic heterogeneity and recalcitrance of which hindered the efficient lignin biorefinery and utilization. Compared with chemical processing, bioprocessi...

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Published in:Biotechnology for biofuels 2021-04, Vol.14 (1), p.84-84, Article 84
Main Authors: Weng, Caihong, Peng, Xiaowei, Han, Yejun
Format: Article
Language:English
Subjects:
Aerobic microorganisms
Alcohol
Anaerobic conditions
Anaerobic microorganisms
Aromatic compounds
Bacteria
Biodegradation
Biological products
Biomass
Bioprocessing
Biorefineries
Biphenyl
Carbon
Catalysis
Catechol
Cellulose
Chemical bonds
Chemical engineering
Chemical engineering research
Chemical properties
Conversion
Decomposition
Degradation
Depolymerization
Enzymatic degradation
Enzymes
Fermentation
Fungi
Heterogeneity
Industrial microorganisms
Laccase
Lignin
Lignin peroxidase
Lignin-derived aromatics
Manganese
Manganese peroxidase
Metabolic engineering
Metabolic pathways
Metabolism
Metabolites
Microbial enzymes
Microbial metabolism
Microorganisms
Peroxidase
Production processes
Protocatechuic acid
Review
Value-added bioproducts
White rot
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description Lignin, the most abundant renewable aromatic compound in nature, is an excellent feedstock for value-added bioproducts manufacturing; while the intrinsic heterogeneity and recalcitrance of which hindered the efficient lignin biorefinery and utilization. Compared with chemical processing, bioprocessing with microbial and enzymatic catalysis is a clean and efficient method for lignin depolymerization and conversion. Generally, lignin bioprocessing involves lignin decomposition to lignin-based aromatics via extracellular microbial enzymes and further converted to value-added bioproducts through microbial metabolism. In the review, the most recent advances in degradation and conversion of lignin to value-added bioproducts catalyzed by microbes and enzymes were summarized. The lignin-degrading microorganisms of white-rot fungi, brown-rot fungi, soft-rot fungi, and bacteria under aerobic and anaerobic conditions were comparatively analyzed. The catalytic metabolism of the microbial lignin-degrading enzymes of laccase, lignin peroxidase, manganese peroxidase, biphenyl bond cleavage enzyme, versatile peroxidase, and β-etherize was discussed. The microbial metabolic process of H-lignin, G-lignin, S-lignin based derivatives, protocatechuic acid, and catechol was reviewed. Lignin was depolymerized to lignin-derived aromatic compounds by the secreted enzymes of fungi and bacteria, and the aromatics were converted to value-added compounds through microbial catalysis and metabolic engineering. The review also proposes new insights for future work to overcome the recalcitrance of lignin and convert it to value-added bioproducts by microbial and enzymatic catalysis.
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The microbial metabolic process of H-lignin, G-lignin, S-lignin based derivatives, protocatechuic acid, and catechol was reviewed. Lignin was depolymerized to lignin-derived aromatic compounds by the secreted enzymes of fungi and bacteria, and the aromatics were converted to value-added compounds through microbial catalysis and metabolic engineering. The review also proposes new insights for future work to overcome the recalcitrance of lignin and convert it to value-added bioproducts by microbial and enzymatic catalysis.</abstract><cop>England</cop><pub>BioMed Central Ltd</pub><pmid>33812391</pmid><doi>10.1186/s13068-021-01934-w</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0001-7797-3925</orcidid><oa>free_for_read</oa></addata></record>
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subjects Aerobic microorganisms
Alcohol
Anaerobic conditions
Anaerobic microorganisms
Aromatic compounds
Bacteria
Biodegradation
Biological products
Biomass
Bioprocessing
Biorefineries
Biphenyl
Carbon
Catalysis
Catechol
Cellulose
Chemical bonds
Chemical engineering
Chemical engineering research
Chemical properties
Conversion
Decomposition
Degradation
Depolymerization
Enzymatic degradation
Enzymes
Fermentation
Fungi
Heterogeneity
Industrial microorganisms
Laccase
Lignin
Lignin peroxidase
Lignin-derived aromatics
Manganese
Manganese peroxidase
Metabolic engineering
Metabolic pathways
Metabolism
Metabolites
Microbial enzymes
Microbial metabolism
Microorganisms
Peroxidase
Production processes
Protocatechuic acid
Review
Value-added bioproducts
White rot
title Depolymerization and conversion of lignin to value-added bioproducts by microbial and enzymatic catalysis
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