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Ji T, Liaqat F, Khazi MI, Liaqat N, Nawaz MZ, Zhu D. Lignin biotransformation: Advances in enzymatic valorization and bioproduction strategies. INDUSTRIAL CROPS AND PRODUCTS 2024; 216:118759. [DOI: 10.1016/j.indcrop.2024.118759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
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Gao J, Ali MY, Kamaraj Y, Zhang Z, Weike L, Sethupathy S, Zhu D. A comprehensive review on biological funnel mechanism in lignin valorization: Pathways and enzyme dynamics. Microbiol Res 2024; 287:127835. [PMID: 39032264 DOI: 10.1016/j.micres.2024.127835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 06/17/2024] [Accepted: 07/12/2024] [Indexed: 07/23/2024]
Abstract
Lignin, a significant byproduct of the paper and pulp industry, is attracting interest due to its potential utilization in biomaterial-based sectors and biofuel production. Investigating biological methods for converting lignin into valuable products is crucial for effective utilization and has recently gained growing attention. Several microorganisms effectively decomposed low molecular weight lignins, transforming them into intermediate compounds via upper and lower metabolic pathways. This review focuses on assessing bacterial metabolic pathways involved in the breakdown of lignin into aromatic compounds and their subsequent utilization by different bacteria through various metabolic pathways. Understanding these pathways is essential for developing efficient synthetic metabolic systems to valorize lignin and obtain valuable industrial aromatic chemicals. The concept of "biological funneling," which involves examining key enzymes, their interactions, and the complex metabolic pathways associated with lignin conversion, is crucial in lignin valorization. By manipulating lignin metabolic pathways and utilizing biological routes, many aromatic compounds can be synthesized within cellular factories. Although there is insufficient evidence regarding the complete metabolism of polyaromatic hydrocarbons by particular microorganisms, understanding lignin-degrading enzymes, regulatory mechanisms, and interactions among various enzyme systems is essential for optimizing lignin valorization. This review highlights recent advancements in lignin valorization, bio-funneling, multi-omics, and analytical characterization approaches for aromatic utilization. It provides up-to-date information and insights into the latest research findings and technological innovations. The review offers valuable insights into the future potential of biological routes for lignin valorization.
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Affiliation(s)
- Jiayue Gao
- Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Mohamed Yassin Ali
- Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China; Department of Biochemistry, Faculty of Agriculture, Fayoum University, Fayoum 63514, Egypt
| | - Yoganathan Kamaraj
- Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Zhenghao Zhang
- Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Li Weike
- Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Sivasamy Sethupathy
- Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Daochen Zhu
- Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China.
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Grząbka-Zasadzińska A, Piątek A, Klapiszewski Ł, Borysiak S. Structure and Properties of Polylactide Composites with TiO 2-Lignin Hybrid Fillers. Int J Mol Sci 2024; 25:4398. [PMID: 38673982 PMCID: PMC11050034 DOI: 10.3390/ijms25084398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 04/28/2024] Open
Abstract
The research presented in this article focuses on the use of inorganic-organic material, based on titanium dioxide and lignin, as a filler for polylactide (PLA) biocomposites. To date, no research has been conducted to understand the impact of hybrid fillers consisting of TiO2 and lignin on the supermolecular structure and crystallization abilities of polylactide. Polymer composites containing 1, 3 or 5 wt.% of hybrid filler or TiO2 were assessed in terms of their structure, morphology, and thermal properties. Mechanical properties, including tensile testing, bending, impact strength, and hardness, were discussed. The hybrid filler is characterized by a very good electrokinetic stability at pH greater than 3-4. The addition of all fillers led to a small decrease in the glass transition temperature but, most importantly, the addition of 1% of the hybrid filler to the PLA matrix increased the degree of crystallinity of the material by up to 20%. Microscopic studies revealed differences in the crystallization behavior and nucleation ability of fillers. The use of hybrid filler resulted in higher nucleation density and shorter induction time than in unfilled PLA or PLA with only TiO2. The introduction of small amounts of hybrid filler also affected the mechanical properties of the composites, causing an increase in bending strength and hardness. This information may be useful from a technological process standpoint and may also help to increase the range of applicability of biobased materials.
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Affiliation(s)
- Aleksandra Grząbka-Zasadzińska
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland; (A.P.); (S.B.)
| | | | - Łukasz Klapiszewski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland; (A.P.); (S.B.)
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Pajer N, Gigli M, Crestini C. The Laccase Catalysed Tandem Lignin Depolymerisation/Polymerisation. CHEMSUSCHEM 2024:e202301646. [PMID: 38470000 DOI: 10.1002/cssc.202301646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 03/07/2024] [Accepted: 03/11/2024] [Indexed: 03/13/2024]
Abstract
The development of strategies allowing either the production of high value phenolics, or the isolation of properties-enhanced materials from technical lignins represents a fundamental step in the industrial upcycling of technical lignins. Both aims are met by the strategy presented in the present work, relying on the coupling of solvent-based fractionation with the oxidative action of a new type of alkaline-stable genetically modified bacterial laccase. The described approach succeeded in the tandem, high-yield and selective isolation of valuable lignin-monomeric compounds (MCs) and high molecular weight and hydrophobicity-tailored polymerised materials (PMs) from two technical lignins, namely softwood kraft lignin (SKL), and wheat straw organosolv lignin (WSL). With respect to MCs, higher yields as compared to similar studies (up to 17.2 mg/g) were achieved. PMs from SKL samples where characterised by an almost quadrupled Mw, while in the case of WSL the Mw was approximately doubled. Noteworthy, the reaction conditions were optimized in terms of reaction temperature, time, enzymatic loading, and alkalinity for the selective production of single MCs. Most interestingly, technical lignins as well as their fractions and the PMs deriving from their laccase-catalysed oxidation showed increased hydrophobicity.
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Affiliation(s)
- Nicolò Pajer
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Mestre, Italy, 30135
| | - Matteo Gigli
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Mestre, Italy, 30135
| | - Claudia Crestini
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Mestre, Italy, 30135
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Liu E, Mercado MIV, Segato F, Wilkins MR. A green pathway for lignin valorization: Enzymatic lignin depolymerization in biocompatible ionic liquids and deep eutectic solvents. Enzyme Microb Technol 2024; 174:110392. [PMID: 38171172 DOI: 10.1016/j.enzmictec.2023.110392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024]
Abstract
Lignin depolymerization, which enables the breakdown of a complex and heterogeneous aromatic polymer into relatively uniform derivatives, serves as a critical process in valorization of lignin. Enzymatic lignin depolymerization has become a promising biological strategy to overcome the heterogeneity of lignin, due to its mild reaction conditions and high specificity. However, the low solubility of lignin compounds in aqueous environments prevents efficient lignin depolymerization by lignin-degrading enzymes. The employment of biocompatible ionic liquids (ILs) and deep eutectic solvents (DESs) in lignin fractionation has created a promising pathway to enzymatically depolymerize lignin within these green solvents to increase lignin solubility. In this review, recent research progress on enzymatic lignin depolymerization, particularly in a consolidated process involving ILs/DESs is summarized. In addition, the interactions between lignin-degrading enzymes and solvent systems are explored, and potential protein engineering methodology to improve the performance of lignin-degrading enzymes is discussed. Consolidation of enzymatic lignin depolymerization and biocompatible ILs/DESs paves a sustainable, efficient, and synergistic way to convert lignin into value-added products.
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Affiliation(s)
- Enshi Liu
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | | | - Fernando Segato
- Department of Biotechnology, University of São Paulo, Lorena, SP, Brazil
| | - Mark R Wilkins
- Carl and Melinda Helwig Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS, USA.
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Giparakis S, Winkler M, Rudroff F. Nature stays natural: two novel chemo-enzymatic one-pot cascades for the synthesis of fragrance and flavor aldehydes. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2024; 26:1338-1344. [PMID: 38323304 PMCID: PMC10840651 DOI: 10.1039/d3gc04191c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 12/21/2023] [Indexed: 02/08/2024]
Abstract
Novel synthetic strategies for the production of high-value chemicals based on the 12 principles of green chemistry are highly desired. Herein, we present a proof of concept for two novel chemo-enzymatic one-pot cascades allowing for the production of valuable fragrance and flavor aldehydes. We utilized renewable phenylpropenes, such as eugenol from cloves or estragole from estragon, as starting materials. For the first strategy, Pd-catalyzed isomerization of the allylic double bond and subsequent enzyme-mediated (aromatic dioxygenase, ADO) alkene cleavage were performed to obtain the desired aldehydes. In the second route, the double bond was oxidized to the corresponding ketone via a copper-free Wacker oxidation protocol followed by enzymatic Baeyer-Villiger oxidation (phenylacetone monooxygenase from Thermobifida fusca), esterase-mediated (esterase from Pseudomonas fluorescens, PfeI) hydrolysis and subsequent oxidation of the primary alcohol (alcohol dehydrogenase from Pseudomonas putida, AlkJ) to the respective aldehyde products. Eight different phenylpropene derivatives were subjected to these reaction sequences, allowing for the synthesis of seven aldehydes in up to 55% yield after 4 reaction steps (86% for each step).
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Affiliation(s)
- Stefan Giparakis
- TU Wien, Institute of Applied Synthetic Chemistry Getreidemarkt 9 163-OC 1060 Vienna Austria
| | - Margit Winkler
- TU-Graz, Institut für Molekulare Biotechnologie Petersgasse 14 8010 Graz Austria
- Austrian Center of Industrial Biotechnology (ACIB GmbH) Krenngasse 37 8010 Graz Austria
| | - Florian Rudroff
- TU Wien, Institute of Applied Synthetic Chemistry Getreidemarkt 9 163-OC 1060 Vienna Austria
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Robles-Machuca M, Aviles-Mejía L, Romero-Soto IC, Rodríguez JA, Armenta-Pérez VP, Camacho-Ruiz MA. Cloning, expression, and biochemical characterization of β-etherase LigF from Altererythrobacter sp. B11. Heliyon 2023; 9:e21006. [PMID: 37916079 PMCID: PMC10616338 DOI: 10.1016/j.heliyon.2023.e21006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/25/2023] [Accepted: 10/12/2023] [Indexed: 11/03/2023] Open
Abstract
Lignin, a complex heteropolymer present in plant cell walls, is now recognized as a valuable renewable resource with potential applications in various industries. The lignin biorefinery concept, which aims to convert lignin into value-added products, has gained significant attention in recent years. β-etherases, enzymes that selectively cleave β-O-4 aryl ether bonds in lignin, have shown promise in lignin depolymerization. In this study, the β-etherase LigF from Altererythrobacter sp. B11 was cloned, expressed, purified, and biochemically characterized. The LigF-AB11 enzyme exhibited optimal activity at 32 °C and pH 8.5 when catalyzing the substrate PNP-AV. The enzyme displayed mesophilic behavior and demonstrated higher activity at moderate temperatures. Stability analysis revealed that LigF-AB11 was not thermostable, with a complete loss of activity at 60 °C within an hour. Moreover, LigF-AB11 exhibited excellent pH stability, retaining over 50 % of its activity after 1 h under pH conditions ranging from 3.0 to 11.0. Metal ions and surface impregnation agents were found to affect the enzyme's activity, highlighting the importance of considering these factors in enzymatic processes for lignin depolymerization. This study provides valuable insights into the biochemical properties of LigF-AB11 and contributes to the development of efficient enzymatic processes for lignin biorefineries. Further optimization and understanding of β-etherases will facilitate their practical application in the valorization of lignin.
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Affiliation(s)
- Marcela Robles-Machuca
- Tecnología de Alimentos, Secretaría de Investigación y Posgrado, Universidad Autónoma de Nayarit, Tepic, 63000, Nayarit, Mexico
| | - Lucero Aviles-Mejía
- Laboratorio de Investigación en Biotecnología, Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, 46200, Jalisco, Mexico
| | - Itzel Celeste Romero-Soto
- Laboratorio de Investigación en Biotecnología, Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, 46200, Jalisco, Mexico
| | - Jorge A. Rodríguez
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ), Zapopan, 45019, Jalisco, Mexico
| | - Vicente Paúl Armenta-Pérez
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ), Zapopan, 45019, Jalisco, Mexico
| | - María Angeles Camacho-Ruiz
- Laboratorio de Investigación en Biotecnología, Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, 46200, Jalisco, Mexico
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Champramary S, Indic B, Szűcs A, Tyagi C, Languar O, Hasan KMF, Szekeres A, Vágvölgyi C, Kredics L, Sipos G. The mycoremediation potential of the armillarioids: a comparative genomics analysis. Front Bioeng Biotechnol 2023; 11:1189640. [PMID: 37662429 PMCID: PMC10470841 DOI: 10.3389/fbioe.2023.1189640] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 08/03/2023] [Indexed: 09/05/2023] Open
Abstract
Genes involved in mycoremediation were identified by comparative genomics analysis in 10 armillarioid species and selected groups of white-rot Basidiomycota (14) and soft-rot Ascomycota (12) species to confine the distinctive bioremediation capabilities of the armillarioids. The genomes were explored using phylogenetic principal component analysis (pPCA), searching for genes already documented in a biocatalysis/biodegradation database. The results underlined a distinct, increased potential of aromatics-degrading genes/enzymes in armillarioids, with particular emphasis on a high copy number and diverse spectrum of benzoate 4-monooxygenase [EC:1.14.14.92] homologs. In addition, other enzymes involved in the degradation of various monocyclic aromatics were more abundant in the armillarioids than in the other white-rot basidiomycetes, and enzymes involved in the degradation of polycyclic aromatic hydrocarbons (PAHs) were more prevailing in armillarioids and other white-rot species than in soft-rot Ascomycetes. Transcriptome profiling of A. ostoyae and A. borealis isolates confirmed that several genes involved in the degradation of benzoates and other monocyclic aromatics were distinctively expressed in the wood-invading fungal mycelia. Data were consistent with armillarioid species offering a more powerful potential in degrading aromatics. Our results provide a reliable, practical solution for screening the likely fungal candidates for their full biodegradation potential, applicability, and possible specialization based on their genomics data.
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Affiliation(s)
- Simang Champramary
- Functional Genomics and Bioinformatics Group, Institute of Forest and Natural Resource Management, Faculty of Forestry, University of Sopron, Sopron, Hungary
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Boris Indic
- Functional Genomics and Bioinformatics Group, Institute of Forest and Natural Resource Management, Faculty of Forestry, University of Sopron, Sopron, Hungary
| | - Attila Szűcs
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Chetna Tyagi
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Omar Languar
- Functional Genomics and Bioinformatics Group, Institute of Forest and Natural Resource Management, Faculty of Forestry, University of Sopron, Sopron, Hungary
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - K. M. Faridul Hasan
- Fibre and Nanotechnology Program, Faculty of Wood Engineering and Creative Industries, University of Sopron, Sopron, Hungary
| | - András Szekeres
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Csaba Vágvölgyi
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - László Kredics
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - György Sipos
- Functional Genomics and Bioinformatics Group, Institute of Forest and Natural Resource Management, Faculty of Forestry, University of Sopron, Sopron, Hungary
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Li X, Li K, Wang Y, Huang Y, Yang H, Zhu P, Li Q. Diversity of lignocellulolytic functional genes and heterogeneity of thermophilic microbes during different wastes composting. BIORESOURCE TECHNOLOGY 2023; 372:128697. [PMID: 36731616 DOI: 10.1016/j.biortech.2023.128697] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/26/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
The goal of this study was to investigate the heterogeneity of thermophilic microorganisms and their lignocellulose-degrading gene diversity during composting. In this study, bagasse pith/dairy manure (BAG) and sawdust/dairy manure (SAW) were used as experimental subjects. The pour plate method indicated that thermophilic bacteria and thermophilic actinobacteria were more culturable than thermophilic fungi. Metagenomics analysis showed that the Actinobacteria, Firmicutes and Proteobacteria were the dominant phyla during composting. In addition, auxiliary activity and glycoside hydrolase families were critical for lignocellulosic degradation, which were found to be more abundant in BAG. As a result, the degradation rates of cellulose, hemicellulose and lignin in BAG (7.36%, 13.99% and 5.68%) were observably higher than those in SAW (6.13%, 12.09% and 2.62%). These findings contribute to understanding how thermophilic microbial communities play a role in the deconstruction of different lignocelluloses and provide a potential strategy to comprehensively utilize the resources of lignocellulosic biomass.
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Affiliation(s)
- Xiaolan Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Kecheng Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yiwu Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yite Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Hongxiang Yang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Pengfei Zhu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Qunliang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
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Ramires Araujo T, Bresolin D, de Oliveira D, Sayer C, Henrique Hermes de Araújo P, Vladimir de Oliveira J. Conventional lignin functionalization for polyurethane applications and a future vision in the use of enzymes as an alternative method. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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Vilela N, Tomazetto G, Gonçalves TA, Sodré V, Persinoti GF, Moraes EC, de Oliveira AHC, da Silva SN, Fill TP, Damasio A, Squina FM. Integrative omics analyses of the ligninolytic Rhodosporidium fluviale LM-2 disclose catabolic pathways for biobased chemical production. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:5. [PMID: 36624471 PMCID: PMC9830802 DOI: 10.1186/s13068-022-02251-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 12/18/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Lignin is an attractive alternative for producing biobased chemicals. It is the second major component of the plant cell wall and is an abundant natural source of aromatic compounds. Lignin degradation using microbial oxidative enzymes that depolymerize lignin and catabolize aromatic compounds into central metabolic intermediates is a promising strategy for lignin valorization. However, the intrinsic heterogeneity and recalcitrance of lignin severely hinder its biocatalytic conversion. In this context, examining microbial degradation systems can provide a fundamental understanding of the pathways and enzymes that are useful for lignin conversion into biotechnologically relevant compounds. RESULTS Lignin-degrading catabolism of a novel Rhodosporidium fluviale strain LM-2 was characterized using multi-omic strategies. This strain was previously isolated from a ligninolytic microbial consortium and presents a set of enzymes related to lignin depolymerization and aromatic compound catabolism. Furthermore, two catabolic routes for producing 4-vinyl guaiacol and vanillin were identified in R. fluviale LM-2. CONCLUSIONS The multi-omic analysis of R. fluviale LM-2, the first for this species, elucidated a repertoire of genes, transcripts, and secreted proteins involved in lignin degradation. This study expands the understanding of ligninolytic metabolism in a non-conventional yeast, which has the potential for future genetic manipulation. Moreover, this work unveiled critical pathways and enzymes that can be exported to other systems, including model organisms, for lignin valorization.
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Affiliation(s)
- Nathália Vilela
- grid.442238.b0000 0001 1882 0259Programa de Processos Tecnológicos e Ambientais, University of Sorocaba (UNISO), Sorocaba, Brazil ,grid.411087.b0000 0001 0723 2494Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Geizecler Tomazetto
- grid.7048.b0000 0001 1956 2722Department of Biological and Chemical Engineering (BCE), Aarhus University, 8200 Aarhus, Denmark
| | - Thiago Augusto Gonçalves
- grid.4989.c0000 0001 2348 0746Photobiocatalysis Unit—CPBL, and Biomass Transformation Lab—BTL, École Interfacultaire de Bioingénieurs, Université Libre de Bruxelles, Brussels, Belgium
| | - Victoria Sodré
- grid.7372.10000 0000 8809 1613Department of Chemistry, University of Warwick, Coventry, UK
| | - Gabriela Felix Persinoti
- grid.452567.70000 0004 0445 0877Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Eduardo Cruz Moraes
- grid.411087.b0000 0001 0723 2494Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Arthur Henrique Cavalcante de Oliveira
- grid.11899.380000 0004 1937 0722Department of Chemistry, Faculty of Philosophy Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - Stephanie Nemesio da Silva
- grid.411087.b0000 0001 0723 2494Laboratory of Biology Chemical Microbial (LaBioQuiMi), Institute of Chemistry, University of Campinas (UNICAMP), Campinas, Brazil
| | - Taícia Pacheco Fill
- grid.411087.b0000 0001 0723 2494Laboratory of Biology Chemical Microbial (LaBioQuiMi), Institute of Chemistry, University of Campinas (UNICAMP), Campinas, Brazil
| | - André Damasio
- grid.411087.b0000 0001 0723 2494Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Fabio Marcio Squina
- grid.442238.b0000 0001 1882 0259Programa de Processos Tecnológicos e Ambientais, University of Sorocaba (UNISO), Sorocaba, Brazil
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Wei J, Yang L, Feng W. Efficient oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid by a two-enzyme system: Combination of a bacterial laccase with catalase. Enzyme Microb Technol 2023; 162:110144. [DOI: 10.1016/j.enzmictec.2022.110144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/12/2022] [Accepted: 10/15/2022] [Indexed: 11/13/2022]
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13
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Li F, Zhao Y, Xue L, Ma F, Dai SY, Xie S. Microbial lignin valorization through depolymerization to aromatics conversion. Trends Biotechnol 2022; 40:1469-1487. [PMID: 36307230 DOI: 10.1016/j.tibtech.2022.09.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 11/05/2022]
Abstract
Lignin is the most abundant source of renewable aromatic biopolymers and its valorization presents significant value for biorefinery sustainability, which promotes the utilization of renewable resources. However, it is challenging to fully convert the structurally complex, heterogeneous, and recalcitrant lignin into high-value products. The in-depth research on the lignin degradation mechanism, microbial metabolic pathways, and rational design of new systems using synthetic biology have significantly accelerated the development of lignin valorization. This review summarizes the key enzymes involved in lignin depolymerization, the mechanisms of microbial lignin conversion, and the lignin valorization application with integrated systems and synthetic biology. Current challenges and future strategies to further study lignin biodegradation and the trends of lignin valorization are also discussed.
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Affiliation(s)
- Fei Li
- Department of Biotechnology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Yiquan Zhao
- Department of Biotechnology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Le Xue
- Department of Biotechnology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Fuying Ma
- Department of Biotechnology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Susie Y Dai
- Department of Plant Pathology and Microbiology, Texas A&M University, College station, TX 77843, USA.
| | - Shangxian Xie
- Department of Biotechnology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
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14
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Properties, Physiological Functions and Involvement of Basidiomycetous Alcohol Oxidase in Wood Degradation. Int J Mol Sci 2022; 23:ijms232213808. [PMID: 36430286 PMCID: PMC9699415 DOI: 10.3390/ijms232213808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/04/2022] [Accepted: 11/06/2022] [Indexed: 11/11/2022] Open
Abstract
Extensive research efforts have been devoted to describing yeast alcohol oxidase (AO) and its promoter region, which is vastly applied in studies of heterologous gene expression. However, little is known about basidiomycetous AO and its physiological role in wood degradation. This review describes several alcohol oxidases from both white and brown rot fungi, highlighting their physicochemical and kinetic properties. Moreover, the review presents a detailed analysis of available AO-encoding gene promoter regions in basidiomycetous fungi with a discussion of the manipulations of culture conditions in relation to the modification of alcohol oxidase gene expression and changes in enzyme production. The analysis of reactions catalyzed by lignin-modifying enzymes (LME) and certain lignin auxiliary enzymes (LDA) elucidated the possible involvement of alcohol oxidase in the degradation of derivatives of this polymer. Combined data on lignin degradation pathways suggest that basidiomycetous AO is important in secondary reactions during lignin decomposition by wood degrading fungi. With numerous alcoholic substrates, the enzyme is probably engaged in a variety of catalytic reactions leading to the detoxification of compounds produced in lignin degradation processes and their utilization as a carbon source by fungal mycelium.
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15
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Lv Y, Wang L, Liu X, Chen B, Zhang M. Degradation kinetics of aromatic VOCs polluted wastewater by functional bacteria at laboratory scale. Sci Rep 2022; 12:19053. [PMID: 36351963 PMCID: PMC9646702 DOI: 10.1038/s41598-022-21356-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 09/26/2022] [Indexed: 11/11/2022] Open
Abstract
Reaction kinetics in biodegradation process is the basis and key of bioremediation technology, which can be used to predict the interaction between microorganisms and environmental states in the system. In this study, the kinetic model (Monod, Moser, Tessier and Cotonis) and kinetic parameters of aerobic biodegradation of functional bacteria in simulated wastewater polluted by aromatic volatile organic compounds (VOCs) were determined by shaking flask experiment. Monod, Moser, Tessier and Contois models were used to fit the experimental data and determine the kinetic parameters based on nonlinear regression analysis. Experimental results demonstrated that the removal rate of aromatic VOCs at 72 h was between 34.78 and 99.75% depending on the initial concentration of aromatic VOCs. The specific growth rate μ and degradation rate q increased with the increase of substrate concentration. The model of Monod, Moser and Tessier could be used to simulate microbial growth and substrate degradation in simulated aromatic VOCs polluted wastewater. Then the model and corresponding kinetic parameters were used to predict the limit concentration of biodegradation and provide theoretical support for the subsequent dynamic simulation and field engineering.
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Affiliation(s)
- Ying Lv
- grid.459522.d0000 0000 9491 9421National Engineering Research Center for Environment-Friendly Metallurgy in Producing Premium Non-Ferrous Metals, GRINM Group Co., Ltd., Beijing, 101407 China ,grid.69775.3a0000 0004 0369 0705School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China ,grid.459522.d0000 0000 9491 9421GRINM Resources and Environment Tech. Co., Ltd., Beijing, 101407 China ,grid.459522.d0000 0000 9491 9421General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Liangshi Wang
- grid.459522.d0000 0000 9491 9421National Engineering Research Center for Environment-Friendly Metallurgy in Producing Premium Non-Ferrous Metals, GRINM Group Co., Ltd., Beijing, 101407 China ,grid.459522.d0000 0000 9491 9421GRINM Resources and Environment Tech. Co., Ltd., Beijing, 101407 China ,grid.459522.d0000 0000 9491 9421General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Xingyu Liu
- grid.459522.d0000 0000 9491 9421General Research Institute for Nonferrous Metals, Beijing, 100088 China ,grid.162107.30000 0001 2156 409XCollege of Water Resources and Environment, China University of Geosciences, Beijing, 100083 China
| | - Bowei Chen
- grid.459522.d0000 0000 9491 9421National Engineering Research Center for Environment-Friendly Metallurgy in Producing Premium Non-Ferrous Metals, GRINM Group Co., Ltd., Beijing, 101407 China ,grid.459522.d0000 0000 9491 9421GRINM Resources and Environment Tech. Co., Ltd., Beijing, 101407 China ,grid.459522.d0000 0000 9491 9421General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Mingjiang Zhang
- grid.459522.d0000 0000 9491 9421National Engineering Research Center for Environment-Friendly Metallurgy in Producing Premium Non-Ferrous Metals, GRINM Group Co., Ltd., Beijing, 101407 China ,grid.459522.d0000 0000 9491 9421GRINM Resources and Environment Tech. Co., Ltd., Beijing, 101407 China ,grid.459522.d0000 0000 9491 9421General Research Institute for Nonferrous Metals, Beijing, 100088 China
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16
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Pravilović R, Todić B, Simović M, Banjanac K, Bezbradica D, Nikacevic N. Kinetic Model for Galacto-Oligosaccharide Synthesis. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Radoslava Pravilović
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Branislav Todić
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Milica Simović
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Katarina Banjanac
- University of Belgrade, Innovation Centre Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Dejan Bezbradica
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Nikola Nikacevic
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
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17
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Li K, Wang Y, Li X, Huang Y, Niu Q, Meng Q, Yang H, Li Q. In-situ generation of H 2O 2 by zero valent iron to control depolymerization of lignocellulose in composting niche. CHEMOSPHERE 2022; 302:134908. [PMID: 35551932 DOI: 10.1016/j.chemosphere.2022.134908] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 04/23/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
Lignocellulosic degradation is a bottleneck of bioconversion during the composting process. In-situ generation of H2O2 in the composting system was an ideal method for efficiently promoting lignocellulase degradation, and zero valent iron (ZVI) was concerned because it can generate H2O2 by reducing dissolved oxygen. This study focused on the effects of ZVI treatment on lignocellulose degradation, microbial communities, and carbohydrate-active enzymes (CAZymes) genes during composting. Its results indicated that ZVI increased H2O2 content during composting, accompanied by the formation of •OH. The degradation rates of lignin, cellulose and hemicellulose in ZVI group (20.77%, 30.35% and 44.7%) were significantly higher than in CK group (17.01%, 26.12% and 38.5%). Metagenomic analysis showed that ZVI induced microbial growth that favored lignocellulose degradation, which increased the abundance of Actinobacteria and Firmicutes but reduced Proteobacteria. At the genus level, the abundance of Thermomonospora, Streptomyces, and Bacillus significantly increased. In addition, glycoside hydrolases and auxiliary activities were important CAZymes families of lignocellulose degradation, and their abundance was higher in the ZVI group. Redundancy analysis showed that the increased H2O2 and •OH content was a critical factor in improving lignocellulose degradation. Overall, H2O2 as a co-substrate enhanced the enzymatic efficiency, •OH unspecifically attacked lignocellulose, and the increase in functional microbial abundance was the main reason for promoting lignocellulose degradation in composting.
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Affiliation(s)
- Kecheng Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Yiwu Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Xiaolan Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Yite Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Qiuqi Niu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Qingran Meng
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Hongxiang Yang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Qunliang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
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18
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Kanubaddi KR, Yang CL, Huang PY, Lin CY, Tai DF, Lee CH. Peptide conformational imprints enhanced the catalytic activity of papain for esterification. Front Bioeng Biotechnol 2022; 10:943751. [PMID: 36051592 PMCID: PMC9424681 DOI: 10.3389/fbioe.2022.943751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
Peptide conformational imprints (PCIs) offer a promising perspective to directly generate binding sites for preserving enzymes with high catalytic activity and stability. In this study, we synthesized a new chiral cross-linker cost-effectively for controlling the matrix morphology of PCIs on magnetic particles (PCIMPs) to stabilize their recognition capability. Meanwhile, based on the flank part of the sequences on papain (PAP), three epitope peptides were selected and synthesized. Molecularly imprinted polymers (MIPs) were then fabricated in the presence of the epitope peptide using our new cross-linker on magnetic particles (MPs) to generate PCIMPs. PCIMPs were formed with helical cavities that complement the PAP structure to adsorb specifically at the targeted position of PAP. PCIMPs65–79 were found to have the best binding parameters to the PAP with Kd = 0.087 μM and Bmax = 4.56 μM. Upon esterification of N-Boc-His-OH, proton nuclear magnetic resonance (1H-NMR) was used to monitor the yield of the reaction and evaluate the activity of PAP/PCIMPs. The kinetic parameters of PAP/PCIMPs65–79 were calculated as Vmax = 3.0 μM s−1, Km = 5 × 10−2 M, kcat = 1.1 × 10–1 s−1, and kcat/Km = 2.2 M−1 s−1. In addition, PAP is bound tightly to PCIMPs to sustain its activity after four consecutive cycles.
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Affiliation(s)
- Kiran Reddy Kanubaddi
- Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan
| | - Ching-Lun Yang
- Department of Chemistry, National Dong Hwa University, Hualien, Taiwan
| | - Pei-Yu Huang
- Department of Chemistry, National Dong Hwa University, Hualien, Taiwan
| | - Chung-Yin Lin
- Medical Imaging Research Center, Institute for Radiological Research, Chang Gung University, Taoyuan, Taiwan
- Department of Neurology, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- *Correspondence: Chung-Yin Lin, ; Dar-Fu Tai,
| | - Dar-Fu Tai
- Department of Chemistry, National Dong Hwa University, Hualien, Taiwan
- *Correspondence: Chung-Yin Lin, ; Dar-Fu Tai,
| | - Chia-Hung Lee
- Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan
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19
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Ali SS, Al-Tohamy R, Mohamed TM, Mahmoud YAG, Ruiz HA, Sun L, Sun J. Could termites be hiding a goldmine of obscure yet promising yeasts for energy crisis solutions based on aromatic wastes? A critical state-of-the-art review. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:35. [PMID: 35379342 PMCID: PMC8981686 DOI: 10.1186/s13068-022-02131-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 03/13/2022] [Indexed: 12/26/2022]
Abstract
Biodiesel is a renewable fuel that can be produced from a range of organic and renewable feedstock including fresh or vegetable oils, animal fats, and oilseed plants. In recent years, the lignin-based aromatic wastes, such as various aromatic waste polymers from agriculture, or organic dye wastewater from textile industry, have attracted much attention in academia, which can be uniquely selected as a potential renewable feedstock for biodiesel product converted by yeast cell factory technology. This current investigation indicated that the highest percentage of lipid accumulation can be achieved as high as 47.25% by an oleaginous yeast strain, Meyerozyma caribbica SSA1654, isolated from a wood-feeding termite gut system, where its synthetic oil conversion ability can reach up to 0.08 (g/l/h) and the fatty acid composition in yeast cells represents over 95% of total fatty acids that are similar to that of vegetable oils. Clearly, the use of oleaginous yeasts, isolated from wood-feeding termites, for synthesizing lipids from aromatics is a clean, efficient, and competitive path to achieve "a sustainable development" towards biodiesel production. However, the lacking of potent oleaginous yeasts to transform lipids from various aromatics, and an unknown metabolic regulation mechanism presented in the natural oleaginous yeast cells are the fundamental challenge we have to face for a potential cell factory development. Under this scope, this review has proposed a novel concept and approach strategy in utilization of oleaginous yeasts as the cell factory to convert aromatic wastes to lipids as the substrate for biodiesel transformation. Therefore, screening robust oleaginous yeast strain(s) from wood-feeding termite gut system with a set of the desirable specific tolerance characteristics is essential. In addition, to reconstruct a desirable metabolic pathway/network to maximize the lipid transformation and accumulation rate from the aromatic wastes with the applications of various "omics" technologies or a synthetic biology approach, where the work agenda will also include to analyze the genome characteristics, to develop a new base mutation gene editing technology, as well as to clarify the influence of the insertion position of aromatic compounds and other biosynthetic pathways in the industrial chassis genome on the expressional level and genome stability. With these unique designs running with a set of the advanced biotech approaches, a novel metabolic pathway using robust oleaginous yeast developed as a cell factory concept can be potentially constructed, integrated and optimized, suggesting that the hypothesis we proposed in utilizing aromatic wastes as a feedstock towards biodiesel product is technically promising and potentially applicable in the near future.
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Affiliation(s)
- Sameh S. Ali
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, 212013 China
- Botany Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
| | - Rania Al-Tohamy
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, 212013 China
| | - Tarek M. Mohamed
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
| | | | - Héctor A. Ruiz
- Biorefinery Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, 25280 Saltillo, Coahuila Mexico
| | - Lushan Sun
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, China
| | - Jianzhong Sun
- School of the Environment and Safety Engineering, Biofuels Institute, Jiangsu University, Zhenjiang, 212013 China
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20
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Pinto PA, Bezerra RMF, Fraga I, Amaral C, Sampaio A, Dias AA. Solid-State Fermentation of Chestnut Shells and Effect of Explanatory Variables in Predictive Saccharification Models. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052572. [PMID: 35270265 PMCID: PMC8909322 DOI: 10.3390/ijerph19052572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 11/16/2022]
Abstract
In this study, chestnut shells (CNS), a recalcitrant and low-value agro-industrial waste obtained during the peeling of Castanea sativa fruits, were subjected to solid-state fermentation by six white-rot fungal strains (Irpex lacteus, Ganoderma resinaceum, Phlebia rufa, Bjerkandera adusta and two Trametes isolates). After being fermented, CNS was subjected to hydrolysis by a commercial enzymatic mix to evaluate the effect of fermentation in saccharification yield. After 48 h hydrolysis with 10 CMCase U mL−1 enzymatic mix, CNS fermented with both Trametes strains was recorded with higher saccharification yield (around 253 mg g−1 fermented CNS), representing 25% w/w increase in reducing sugars as compared to non-fermented controls. To clarify the relationships and general mechanisms of fungal fermentation and its impacts on substrate saccharification, the effects of some independent or explanatory variables in the production of reducing sugars were estimated by general predictive saccharification models. The variables considered were lignocellulolytic activities in fungal fermentation, CNS hydrolysis time, and concentration of enzymatic hydrolysis mix. Multiple linear regression analysis revealed a very high significant effect (p < 0.0001) of fungal laccase and xylanase activities in the saccharification models, thus proving the key potential of these enzymes in CNS solid-state fermentation.
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Affiliation(s)
- Paula A. Pinto
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
| | - Rui M. F. Bezerra
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Irene Fraga
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Carla Amaral
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Ana Sampaio
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Albino A. Dias
- CITAB—Centre for the Research and Technology of Agro-Environmental and Biological Sciences, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; (P.A.P.); (R.M.F.B.); (I.F.); (C.A.); (A.S.)
- Department of Biology and Environment, UTAD—Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
- Correspondence:
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21
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Reshmy R, Athiyaman Balakumaran P, Divakar K, Philip E, Madhavan A, Pugazhendhi A, Sirohi R, Binod P, Kumar Awasthi M, Sindhu R. Microbial valorization of lignin: Prospects and challenges. BIORESOURCE TECHNOLOGY 2022; 344:126240. [PMID: 34737164 DOI: 10.1016/j.biortech.2021.126240] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/22/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Lignin is the world's second most prevalent biomaterial, but its effective value-added product valorization methods are still being developed. The most common preparation processes for converting lignin to platform chemicals and biofuels are fragmentation and depolymerization. Due to its structural diversity, fragmentation generally produces a variety of products, necessitating tedious separation and purifying methods to isolate the desired products. Bacterial-based techniques are commonly utilized for lignin fragmentation due to their high metabolitic activity. Recent advancements in lignin valorization utilizing bacteria, such as lignin decomposing microbes and major pathways involved that can breakdown lignin into various valuable products namely lipids, furfural, vanillin, polyhydroxybutyrate, poly lactic acid blends were discussed in this review. This review also covers the genetic and fermentation methodologies to enhance lignin decomposition, challenges and future trends of microbe based lignin valorization.
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Affiliation(s)
- R Reshmy
- Post Graduate and Research Department of Chemistry, Bishop Moore College, Mavelikara 690 110, Kerala, India
| | - Palanisamy Athiyaman Balakumaran
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - K Divakar
- Department of Biotechnology, Sri Venkateswara College of Engineering, Sriperumbudur 602 117, Tamil Nadu, India
| | - Eapen Philip
- Post Graduate and Research Department of Chemistry, Bishop Moore College, Mavelikara 690 110, Kerala, India
| | - Aravind Madhavan
- Rajiv Gandhi Centre for Biotechnology, Jagathy, Thiruvananthapuram 695 014, Kerala, India
| | - Arivalagan Pugazhendhi
- School of Renewable Energy, Maejo University, Chiang Mai 50290, Thailand; College of Medical and Health Science, Asia University, Taichung, Taiwan
| | - Ranjna Sirohi
- Department of Chemical & Biological Engineering, Korea University, Seoul 136713, Republic of Korea; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India
| | - Parameswaran Binod
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712 100, China
| | - Raveendran Sindhu
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India.
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22
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Guo WJ, Xu JK, Wu ST, Gao SQ, Wen GB, Tan X, Lin YW. Design and Engineering of an Efficient Peroxidase Using Myoglobin for Dye Decolorization and Lignin Bioconversion. Int J Mol Sci 2021; 23:ijms23010413. [PMID: 35008837 PMCID: PMC8745427 DOI: 10.3390/ijms23010413] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/26/2021] [Accepted: 12/30/2021] [Indexed: 12/25/2022] Open
Abstract
The treatment of environmental pollutants such as synthetic dyes and lignin has received much attention, especially for biotechnological treatments using both native and artificial metalloenzymes. In this study, we designed and engineered an efficient peroxidase using the O2 carrier myoglobin (Mb) as a protein scaffold by four mutations (F43Y/T67R/P88W/F138W), which combines the key structural features of natural peroxidases such as the presence of a conserved His-Arg pair and Tyr/Trp residues close to the heme active center. Kinetic studies revealed that the quadruple mutant exhibits considerably enhanced peroxidase activity, with the catalytic efficiency (kcat/Km) comparable to that of the most efficient natural enzyme, horseradish peroxidase (HRP). Moreover, the designed enzyme can effectively decolorize a variety of synthetic organic dyes and catalyze the bioconversion of lignin, such as Kraft lignin and a model compound, guaiacylglycerol-β-guaiacyl ether (GGE). As analyzed by HPLC and ESI-MS, we identified several bioconversion products of GGE, as produced via bond cleavage followed by dimerization or trimerization, which illustrates the mechanism for lignin bioconversion. This study indicates that the designed enzyme could be exploited for the decolorization of textile wastewater contaminated with various dyes, as well as for the bioconversion of lignin to produce more value-added products.
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Affiliation(s)
- Wen-Jie Guo
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China; (W.-J.G.); (S.-T.W.)
| | - Jia-Kun Xu
- Key Laboratory of Sustainable Development of Polar Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Laboratory for Marine Drugs and Byproducts of Pilot National Laboratory for Marine Science and Technology, Qingdao 266071, China;
| | - Sheng-Tao Wu
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China; (W.-J.G.); (S.-T.W.)
| | - Shu-Qin Gao
- Key Laboratory of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang 421001, China; (S.-Q.G.); (G.-B.W.)
| | - Ge-Bo Wen
- Key Laboratory of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang 421001, China; (S.-Q.G.); (G.-B.W.)
| | - Xiangshi Tan
- Department of Chemistry & Institute of Biomedical Science, Fudan University, Shanghai 200433, China;
| | - Ying-Wu Lin
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China; (W.-J.G.); (S.-T.W.)
- Key Laboratory of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang 421001, China; (S.-Q.G.); (G.-B.W.)
- Correspondence: ; Tel.: +86-734-8282375
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23
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Mayr SA, Subagia R, Weiss R, Schwaiger N, Weber HK, Leitner J, Ribitsch D, Nyanhongo GS, Guebitz GM. Oxidation of Various Kraft Lignins with a Bacterial Laccase Enzyme. Int J Mol Sci 2021; 22:ijms222313161. [PMID: 34884966 PMCID: PMC8658217 DOI: 10.3390/ijms222313161] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 01/26/2023] Open
Abstract
Modification of kraft lignin (KL), traditionally uses harsh and energy-demanding physical and chemical processes. In this study, the potential of the bacterial laccase CotA (spore coating protein A) for oxidation of KL under mild conditions was assessed. Thereby, the efficiency of CotA to oxidize both softwood and hardwood KL of varying purity at alkaline conditions was examined. For the respective type of wood, the highest oxidation activity by CotA was determined for the medium ash content softwood KL (MA_S) and the medium ash content hardwood KL (MA_H), respectively. By an up to 95% decrease in fluorescence and up to 65% in phenol content coupling of the structural lignin units was indicated. These results correlated with an increase in viscosity and molecular weight, which increased nearly 2 and 20-fold for MA_H and about 1.3 and 6.0-fold for MA_S, respectively. Thus, this study confirms that the CotA laccase can oxidize a variety of KL at alkaline conditions, while the origin and purity of KL were found to have a major impact on the efficiency of oxidation. Under the herein tested conditions, it was observed that the MA_H KL showed the highest susceptibility to CotA oxidation when compared to the other hardwood KLs and the softwood KLs. Therefore, this could be a viable method to produce sustainable resins and adhesives.
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Affiliation(s)
- Sebastian A. Mayr
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences (BOKU), Konrad Lorenz Strasse 20, 3430 Tulln, Austria; (S.A.M.); (D.R.); (G.S.N.); (G.M.G.)
| | - Raditya Subagia
- Austrian Centre for Industrial Biotechnology (ACIB), Konrad Lorenz Strasse 20, 3430 Tulln, Austria;
| | - Renate Weiss
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences (BOKU), Konrad Lorenz Strasse 20, 3430 Tulln, Austria; (S.A.M.); (D.R.); (G.S.N.); (G.M.G.)
- Correspondence: ; Tel.: +43-1-47654-97486
| | - Nikolaus Schwaiger
- Sappi Paper Holding GmbH, Brucker Strasse 21, 8101 Gratkorn, Austria; (N.S.); (H.K.W.)
| | - Hedda K. Weber
- Sappi Paper Holding GmbH, Brucker Strasse 21, 8101 Gratkorn, Austria; (N.S.); (H.K.W.)
| | | | - Doris Ribitsch
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences (BOKU), Konrad Lorenz Strasse 20, 3430 Tulln, Austria; (S.A.M.); (D.R.); (G.S.N.); (G.M.G.)
- Austrian Centre for Industrial Biotechnology (ACIB), Konrad Lorenz Strasse 20, 3430 Tulln, Austria;
| | - Gibson S. Nyanhongo
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences (BOKU), Konrad Lorenz Strasse 20, 3430 Tulln, Austria; (S.A.M.); (D.R.); (G.S.N.); (G.M.G.)
- Austrian Centre for Industrial Biotechnology (ACIB), Konrad Lorenz Strasse 20, 3430 Tulln, Austria;
| | - Georg M. Guebitz
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences (BOKU), Konrad Lorenz Strasse 20, 3430 Tulln, Austria; (S.A.M.); (D.R.); (G.S.N.); (G.M.G.)
- Austrian Centre for Industrial Biotechnology (ACIB), Konrad Lorenz Strasse 20, 3430 Tulln, Austria;
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24
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A Islam ST, Zhang J, Tonin F, Hinderks R, Deurloo YN, Urlacher VB, Hagedoorn PL. Isothermal titration calorimetric assessment of lignin conversion by laccases. Biotechnol Bioeng 2021; 119:493-503. [PMID: 34796477 PMCID: PMC9299204 DOI: 10.1002/bit.27991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/01/2021] [Accepted: 11/13/2021] [Indexed: 01/04/2023]
Abstract
Lignin valorization may offer a sustainable approach to achieve a chemical industry that is not completely dependent on fossil resources for the production of aromatics. However, lignin is a recalcitrant, heterogeneous, and complex polymeric compound for which only very few catalysts can act in a predictable and reproducible manner. Laccase is one of those catalysts and has often been referred to as an ideal “green” catalyst, as it is able to oxidize various linkages within lignin to release aromatic products, with the use of molecular oxygen and formation of water as the only side product. The extent and rate of laccase‐catalyzed lignin conversion were measured using the label‐free analytical technique isothermal titration calorimetry (ITC). IITC provides the molar enthalpy of the reaction, which reflects the extent of conversion and the time‐dependent power trace, which reflects the rate of the reaction. Calorimetric assessment of the lignin conversion brought about by various fungal and bacterial laccases in the absence of mediators showed marked differences in the extent and rate of conversion for the different enzymes. Kraft lignin conversion by Trametes versicolor laccase followed Michaelis–Menten kinetics and was characterized by the following thermodynamic and kinetic parameters ΔHITC = −(2.06 ± 0.06)·103 kJ mol−1, KM = 6.6 ± 1.2 μM and Vmax = 0.30 ± 0.02 U/mg at 25°C and pH 6.5. We envision calorimetric techniques as important tools for the development of enzymatic lignin valorization strategies.
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Affiliation(s)
- Shams T A Islam
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
| | - Jie Zhang
- Chongqing Engineering Research Center for Processing, Storage and Transportation of Characterized Agro-Products, College of Environment and Resources, Chongqing Technology and Business University, Chongqing, China
| | - Fabio Tonin
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
| | - Renske Hinderks
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
| | - Yanthi N Deurloo
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
| | - Vlada B Urlacher
- Institute of Biochemistry, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Peter-Leon Hagedoorn
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
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