1
|
Qiao X, Li P, Zhao J, Li Z, Zhang C, Wu J. Gaining insight into the effect of laccase expression on humic substance formation during lignocellulosic biomass composting. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171548. [PMID: 38458466 DOI: 10.1016/j.scitotenv.2024.171548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/19/2024] [Accepted: 03/04/2024] [Indexed: 03/10/2024]
Abstract
The aim is to enhance lignin humification by promoting laccase activities which can promote lignin depolymerization and reaggregation during composting. 1-Hydroxybenzotriazole (HBT) is employed to conduct laccase mediator system (LMS), application of oxidized graphene (GO) in combination to strengthen LMS. Compared with control, the addition of GO, HBT, and GH (GO coupled with HBT) significantly improved laccase expression and activities (P < 0.05), with lignin humification efficiency also increased by 68.6 %, 36.7 %, and 107.8 %. GH treatment induces microbial expression of laccase by increasing the abundance and synergy of core microbes. The unsupervised learning model, vector autoregressive model and Mantel test function were combined to elucidate the mechanism of action of exogenous materials. The results showed that GO stabilized the composting environment on the one hand, and acted as a support vector to stabilize the LMS and promote the function of laccase on the other. In GH treatment, degradation of macromolecules and humification of small molecules were promoted simultaneously by activating the dual function of laccase. Additionally, it also reveals the GH enhances the humification of lignocellulosic compost by converting phenolic pollutants into aggregates. These findings provide a new way to enhance the dual function of laccase and promote lignin humification during composting. It could effectively achieve the resource utilization of organic solid waste and reduce composting pollution.
Collapse
Affiliation(s)
- Xingyu Qiao
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Peiju Li
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Jinghan Zhao
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Zonglin Li
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Chunhao Zhang
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Junqiu Wu
- College of Life Science, Northeast Agricultural University, Harbin 150030, China.
| |
Collapse
|
2
|
Pena C, Rodil E, Rodríguez H. Capacity of Aqueous Solutions of the Ionic Liquid 1-Ethyl-3-methylimidazolium Acetate to Partially Depolymerize Lignin at Ambient Temperature and Pressure. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:1136-1145. [PMID: 38183298 PMCID: PMC10797632 DOI: 10.1021/acs.jafc.3c04047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 12/02/2023] [Accepted: 12/22/2023] [Indexed: 01/08/2024]
Abstract
Lignin is a very attractive and abundant biopolymer with the potential to be a biorenewable source of a large number of value-added organic chemicals. The current state-of-the-art methods fail to provide efficient valorization of lignin in this regard without the involvement of harsh conditions and auxiliary substances that compromise the overall sustainability of the proposed processes. Making an original approach from the set of mildest temperature and pressure conditions, this work identifies and explores the capacity of an aqueous solution of the nonvolatile ionic liquid 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) to partially depolymerize technical lignin (Indulin AT) by means of a treatment consisting in the simple contact at ambient temperature and pressure. Among a considerable number of valuable phenolic molecules that were identified in the resulting fluid, vanillin (yield of about 3 g/kg) and guaiacol (yield of about 1 g/kg) were the monophenolic compounds obtained in a higher concentration. The properties of the post-treatment solids recovered remain similar to those of the original lignin, although with a relatively lower abundance of guaiacyl units (in agreement with the generation of guaiacyl-derived phenolic molecules, such as vanillin and guaiacol). The assistance of the treatment with UV irradiation in the presence of nanoparticle catalysts does not lead to an improvement in the yields of phenolic compounds.
Collapse
Affiliation(s)
- Carlos
A. Pena
- CRETUS, Department of Chemical
Engineering, Universidade de Santiago de
Compostela, E-15782 Santiago de Compostela, Spain
| | - Eva Rodil
- CRETUS, Department of Chemical
Engineering, Universidade de Santiago de
Compostela, E-15782 Santiago de Compostela, Spain
| | - Héctor Rodríguez
- CRETUS, Department of Chemical
Engineering, Universidade de Santiago de
Compostela, E-15782 Santiago de Compostela, Spain
| |
Collapse
|
3
|
Atiwesh G, Parrish CC, Banoub J, Le TAT. Lignin degradation by microorganisms: A review. Biotechnol Prog 2021; 38:e3226. [PMID: 34854261 DOI: 10.1002/btpr.3226] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/19/2021] [Accepted: 11/28/2021] [Indexed: 11/09/2022]
Abstract
Lignin is an abundant plant-based biopolymer that has found applications in a variety of industries from construction to bioethanol production. This recalcitrant branched polymer is naturally degraded by many different species of microorganisms, including fungi and bacteria. These microbial lignin degradation mechanisms provide a host of possibilities to overcome the challenges of using harmful chemicals to degrade lignin biowaste in many industries. The classes and mechanisms of different microbial lignin degradation options available in nature form the primary focus of the present review. This review first discusses the chemical building blocks of lignin and the industrial sources and applications of this multifaceted polymer. The review further places emphasis on the degradation of lignin by natural means, discussing in detail the lignin degradation activities of various fungal and bacterial species. The lignin-degrading enzymes produced by various microbial species, specifically white-rot fungi, brown-rot fungi, and bacteria, are described. In the end, possible directions for future lignin biodegradation applications and research investigations have been provided.
Collapse
Affiliation(s)
- Ghada Atiwesh
- Environmental Science Program, Memorial University of Newfoundland. St. John's, St. John's, Newfoundland, Canada
| | - Christopher C Parrish
- Chemistry Department, Memorial University of Newfoundland St. John's, St. John's, Newfoundland, Canada.,Department of Ocean Sciences, Memorial University of Newfoundland St. John's, St. John's, Newfoundland, Canada
| | - Joseph Banoub
- Chemistry Department, Memorial University of Newfoundland St. John's, St. John's, Newfoundland, Canada.,Fisheries and Oceans Canada, Science Branch, Special Projects, St John's, Newfoundland, Canada
| | - Tuyet-Anh T Le
- School of Science and the Environment, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.,Environmental Policy Institute, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.,Forestry Economics Research Centre, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
| |
Collapse
|
4
|
Ag immobilized lignin-based PU coating: A promising candidate to promote the mechanical properties, thermal stability, and antibacterial property of paper packaging. Int J Biol Macromol 2021; 189:690-697. [PMID: 34464638 DOI: 10.1016/j.ijbiomac.2021.08.184] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/22/2021] [Accepted: 08/25/2021] [Indexed: 01/13/2023]
Abstract
A lignin-based PU coating was prepared for paper-based green packaging. Two representative diisocyanate were used to prepare the coatings. Due to the rigid aromatic, the physical properties of the TDI system reached the maximum below the lignin content of 40%. The HDI that contains flexible aliphatic chains alleviated the brittleness of coating, and it showed physical advantages when the lignin content was more than 50%. Owing to the high lignin content, the coating presented enhanced thermal stability. After coated with the lignin-based PU coatings, the dry tensile strength of coated paper was improved by 126%. Amazingly, the wet strength was increased from 0.31 to 12.6 MPa with an improvement nearly 40 times. Based on the coordination of lignin, Ag+ was introduced into the PU matrix, which imparted the coating with excellent antibacterial ability. The colony forming units of E. coli and S. aureus were both less than 1. However, no inhibition halo was observed, which indicated that the Ag was firmly anchored on the coating and the antibacterial ability is only available when the bacterial contact the coating surface. The lignin-based PU coating with favorable sustainability and properties shows great potential in paper-based green packaging fields.
Collapse
|
5
|
Chen X, Ouyang X, Li J, Zhao YL. Natural Syringyl Mediators Accelerate Laccase-Catalyzed β-O-4 Cleavage and Cα-Oxidation of a Guaiacyl Model Substrate via an Aggregation Mechanism. ACS OMEGA 2021; 6:22578-22588. [PMID: 34514230 PMCID: PMC8427646 DOI: 10.1021/acsomega.1c02501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/15/2021] [Indexed: 05/30/2023]
Abstract
Laccase-mediator systems (LMSs) have been intensively investigated in lignin degradation. Although only natural metabolites are available for fungal lignin degradation, mediator molecules from metabolites have received substantially less attention than artificial organic-synthetic compounds. It remains unclear which metabolites can accelerate laccase-catalyzed reactions and how those natural mediators influence lignin degradation. In this work, we evaluated Trametes versicolor laccase-catalyzed reaction kinetics on a lignin guaiacyl subunit model (guaiacylglycerol-β-guaiacyl ether, G-β-GE) in the presence of a group of lignin syringyl subunit molecules: syringaldehyde, acetosyringone, and methyl syringate. We then compare their performance to a well-known synthetic mediator ABTS, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid). Time-resolved UPLC-TOF-MS revealed that the syringyl mediators were more effective in accelerating the β-O-4 cleavage and Cα-oxidation of G-β-GE than ABTS under laccase-catalysis, despite the syringyl compounds possessing slower individual oxidation rates. In addition, the product profile of polymerization was also promoted dramatically, compared to that of the ABTS/laccase system. The LMS kinetic modeling suggested that mediator-substrate aggregation played a critical role in the laccase-mediator system; in which, the lignin syringyl and guaiacyl subunits likely form a π-π stacking van der Waals complex that can be oxidized faster than the syringyl or guaiacyl monomers by themselves. This syringyl-guaiacyl aggregation hypothesis postulates that the weak interactions in lignin biopolymers are able to accelerate the laccase-catalyzed biodegradation.
Collapse
Affiliation(s)
- Xu Chen
- State Key Laboratory of Microbial
Metabolism, Joint International Research Laboratory of Metabolic and
Developmental Sciences, Department of Bioinformatics and Biostatistics,
School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Xingyu Ouyang
- State Key Laboratory of Microbial
Metabolism, Joint International Research Laboratory of Metabolic and
Developmental Sciences, Department of Bioinformatics and Biostatistics,
School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Jiayi Li
- State Key Laboratory of Microbial
Metabolism, Joint International Research Laboratory of Metabolic and
Developmental Sciences, Department of Bioinformatics and Biostatistics,
School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| | - Yi-Lei Zhao
- State Key Laboratory of Microbial
Metabolism, Joint International Research Laboratory of Metabolic and
Developmental Sciences, Department of Bioinformatics and Biostatistics,
School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
| |
Collapse
|
6
|
Xie H, Zhang H, Liu X, Tian S, Liu Y, Fu S. Design and Preparation of Multiple Function-Integrated Lignin/Tannin/ZnONP Composite Coatings for Paper-Based Green Packaging. Biomacromolecules 2021; 22:3251-3263. [PMID: 34165303 DOI: 10.1021/acs.biomac.1c00340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Lignin/tannin/ZnONP composite coatings were designed for paper-based green packaging. Multiple functions, such as high strength, moisture resistance, low air permeance, heat endurance, UV aging resistance, and antibacterial/mold properties, were successfully integrated into one biobased coating. Prepolymerization improved the physical properties of coatings at high lignin contents. The best ingredient ratio was: 40% lignin, 15% tannin, and 10% ZnONPs (based on tannin weight), and the as-prepared biocoating was labeled LTZn-10. After coated with LTZn-10, the tensile strength and bursting strength of the packaging were efficiently enhanced by more than 3 times and were dramatically increased by 51.6 and 5.6 times at the wet state, respectively, which reveals that the packaging has favorable moisture resistance and it can be used in high humidity environments. Scanning electron microscopy (SEM) proved that most of the pores on the paper were blocked by the coatings, which helped to decrease the air permeance by 10.3 times. Meanwhile, ZnONPs were evenly spread on the coatings, which endowed the packaging with excellent antibacterial/mold performance. No colony or mycelium was found in the test against Gram-negative/positive bacteria and eight common molds. Besides, antibacterial activity is only available while the bacteria come in contact with the coating and no active substances were released into the culture medium, which is a good property that can keep the cargo from contamination of antibacterial agents. In addition, the coated paper presented an improved Tg and thermal degradation temperature, indicating that the coated package has favorable thermostability and can maintain its outstanding physical properties in a wider temperature range. Lignin and tannin promoted the UV stability and service life of the coated paper, as a rare physical decrease was observed after UV aging for 72 h. The function-integrated biobased coating with favorable sustainability is a good candidate to be widely used in paper-based green packaging fields.
Collapse
Affiliation(s)
- Huihui Xie
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou 510640, Guangdong, China
| | - Hui Zhang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou 510640, Guangdong, China
| | - Xinxin Liu
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou 510640, Guangdong, China
| | - Shenglong Tian
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou 510640, Guangdong, China
| | - Yunsi Liu
- Guangzhou Yinnovator Biotech Co. Ltd., Tianhe North Road 233, Tianhe District, Guangzhou 510620, Guangdong, China
| | - Shiyu Fu
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou 510640, Guangdong, China.,Guangzhou Yinnovator Biotech Co. Ltd., Tianhe North Road 233, Tianhe District, Guangzhou 510620, Guangdong, China
| |
Collapse
|
7
|
Shokri Z, Seidi F, Karami S, Li C, Saeb MR, Xiao H. Laccase immobilization onto natural polysaccharides for biosensing and biodegradation. Carbohydr Polym 2021; 262:117963. [DOI: 10.1016/j.carbpol.2021.117963] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/21/2021] [Accepted: 03/16/2021] [Indexed: 12/20/2022]
|
8
|
Feng N, Wu H, Xie Y, Wu Q. A novel drug delivery system obtained from hydrophobic modified amphiphilic polymers by Maillard reaction. Int J Biol Macromol 2020; 157:146-150. [PMID: 32353493 DOI: 10.1016/j.ijbiomac.2020.04.218] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/30/2020] [Accepted: 04/24/2020] [Indexed: 11/26/2022]
Abstract
In order to improve the bioavailability of paclitaxel, hemicellulose fractions from hot water pretreatment liquor were the first time to design new amphiphilic polymers through the Maillard reaction. Structural characteristics, emulsifying and drug release behaviors of the amphiphilic polymers were then investigated in detail. Results showed that the amphiphilic polymers with degrees of substitution ranging from 0.31 to 1.65 were obtained by reacting hemicellulose fractions with dodecylamine. Furthermore, the nanometer paclitaxel emusion was successfully preparaed. The amphiphilic polymer provided excellent emulsifying properties and desired storage stability. The average particle sizes of emulsion stayed in the range of 235-266 nm, even after 90 days of storage. Besides, the amphiphilic polymer also proved considerable paclitaxel preservation ability and released performance of pH-responsive. The controlled release of paclitaxel was better at pH 5.0, and thus the new amphiphilic polymer can be used as a delivery carrier of hydrophobic drugs.
Collapse
Affiliation(s)
- Nianjie Feng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Lightweight Materials and Processing, Hubei University of Technology, Wuhan 430068, China; Beijing Key Lab of Plant Resource Research and Development, Beijing Technology and Business University, Beijing 100048, China
| | - Hua Wu
- Beijing Key Lab of Plant Resource Research and Development, Beijing Technology and Business University, Beijing 100048, China
| | - Yimin Xie
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Lightweight Materials and Processing, Hubei University of Technology, Wuhan 430068, China
| | - Qian Wu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Lightweight Materials and Processing, Hubei University of Technology, Wuhan 430068, China; Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei Key Laboratoy of Industrial Microbiology, National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Research Center of Food Fermentation Engineering and Technology, Hubei University of Technology, Wuhan, Hubei 430068, China.
| |
Collapse
|
9
|
Xu Y, Wang P, Xue S, Kong F, Ren H, Zhai H. Green biorefinery - the ultra-high hydrolysis rate and behavior of Populus tomentosa hemicellulose autohydrolysis under moderate subcritical water conditions. RSC Adv 2020; 10:18908-18917. [PMID: 35518329 PMCID: PMC9053882 DOI: 10.1039/d0ra02350g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 05/11/2020] [Indexed: 11/23/2022] Open
Abstract
A high monosaccharide conversion rate of hemicellulose in a green solvent and under moderate reaction conditions for industrialization is one of the most important keys in a lignocellulosic biorefinery. The behavior of Populus tomentosa hemicellulose polysaccharides, crystallinity and the furfural formation in the autohydrolysis process under moderate subcritical water conditions (160–180 °C, 0.618–1.002 MPa) were studied. The results have shown that the hemicellulose was converted to corresponding monosaccharides at an ultra-high hydrolysis rate. Factor analysis indicates that the temperature is the most important factor affecting hemicellulose autohydrolysis. When the autohydrolysis temperature increased from 160 to 180 °C for 2 h, the hydrolysis rate of xylose, rhamnose, galactose, mannose, and glucose from hemicellulose increased from 70% to 91%, 71% to 100%, 82% to 95%, 42% to 58%, and 34% to 37%, respectively. Arabinose was completely dissolved in 30 min. The xylose, rhamnose, galactose, and arabinose from hemicellulose could be almost completely removed under the conditions. The hemicellulose removal rate obtained herein exceeded the values reported for most acid, alkali, ionic liquid, or deep eutectic solvent treatments. It is notable that almost all glucose in hemicellulose was dissolved and the glucose in cellulose was partially hydrolyzed. An analysis of the sugar composition and the crystallinity change in the process at 180 °C demonstrate that hydrolysis reaction started to shift from amorphous regions to crystalline regions, due to the partial hydrolysis of crystalline cellulose after 90 min at 180 °C. Overall, these results show that the moderate subcritical water autohydrolysis of hemicellulose in Populus tomentosa may be a potential bio-refinery process. A high monosaccharide conversion rate of hemicellulose in a green solvent and under moderate reaction conditions for industrialization is one of the most important keys in a lignocellulosic biorefinery.![]()
Collapse
Affiliation(s)
- Yanru Xu
- Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, NanJing Forestry University Address No. 159 LongPan Road NanJing JiangSu Province 210037 China
| | - Pengfei Wang
- Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, NanJing Forestry University Address No. 159 LongPan Road NanJing JiangSu Province 210037 China
| | - Shiwen Xue
- Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, NanJing Forestry University Address No. 159 LongPan Road NanJing JiangSu Province 210037 China
| | - Fangong Kong
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences Jinan 250353 China
| | - Hao Ren
- Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, NanJing Forestry University Address No. 159 LongPan Road NanJing JiangSu Province 210037 China .,State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences Jinan 250353 China
| | - Huamin Zhai
- Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, NanJing Forestry University Address No. 159 LongPan Road NanJing JiangSu Province 210037 China
| |
Collapse
|
10
|
Zhang S, Xiao J, Wang G, Chen G. Enzymatic hydrolysis of lignin by ligninolytic enzymes and analysis of the hydrolyzed lignin products. BIORESOURCE TECHNOLOGY 2020; 304:122975. [PMID: 32086036 DOI: 10.1016/j.biortech.2020.122975] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 02/05/2020] [Accepted: 02/05/2020] [Indexed: 06/10/2023]
Abstract
The degradation of alkali lignin was studied using three types of pure enzyme, Lac, LiP, and MnP, using alkali lignin as substrate. The alkali lignin removal rate was found to be 28.98% when Lac, LiP, and MnP were cultured together for alkali lignin degradation. Changes in the structure and composition before and after degradation were characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, nitrogen adsorption, and gas chromatography-mass spectrometry. The degradation product pathways were analyzed. The enzyme was proven to degrade alkali lignin, resulting in destruction of the alkali lignin structure, ring-opening of the macromolecular benzene ring structure and groups in alkali lignin, and chemical bond cleavage. This study explains the principle of alkali lignin enzymatic hydrolysis and provides a theoretical basis for the biodegradation of lignin.
Collapse
Affiliation(s)
- Sitong Zhang
- College of Life Sciences, Jilin Agricultural University, Changchun, China; Key Laboratory of Straw Biology and Utilization, The Ministry of Education, Changchun, China
| | - Jianlong Xiao
- College of Life Sciences, Jilin Agricultural University, Changchun, China
| | - Gang Wang
- College of Life Sciences, Jilin Agricultural University, Changchun, China; Key Laboratory of Straw Biology and Utilization, The Ministry of Education, Changchun, China
| | - Guang Chen
- College of Life Sciences, Jilin Agricultural University, Changchun, China; Key Laboratory of Straw Biology and Utilization, The Ministry of Education, Changchun, China.
| |
Collapse
|
11
|
Chen Y, Fu S, Zhang H. Signally improvement of polyurethane adhesive with hydroxy-enriched lignin from bagasse. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124164] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
12
|
Abstract
There is a high number of well characterized, commercially available laccases with different redox potentials and low substrate specificity, which in turn makes them attractive for a vast array of biotechnological applications. Laccases operate as batteries, storing electrons from individual substrate oxidation reactions to reduce molecular oxygen, releasing water as the only by-product. Due to society’s increasing environmental awareness and the global intensification of bio-based economies, the biotechnological industry is also expanding. Enzymes such as laccases are seen as a better alternative for use in the wood, paper, textile, and food industries, and they are being applied as biocatalysts, biosensors, and biofuel cells. Almost 140 years from the first description of laccase, industrial implementations of these enzymes still remain scarce in comparison to their potential, which is mostly due to high production costs and the limited control of the enzymatic reaction side product(s). This review summarizes the laccase applications in the last decade, focusing on the published patents during this period.
Collapse
|
13
|
Shin SK, Ko YJ, Hyeon JE, Han SO. Studies of advanced lignin valorization based on various types of lignolytic enzymes and microbes. BIORESOURCE TECHNOLOGY 2019; 289:121728. [PMID: 31277889 DOI: 10.1016/j.biortech.2019.121728] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 06/09/2023]
Abstract
Lignin is a robust material that is considered useless because it has an inhibitory effect on microbes and acts as a physical barrier for cellulose degradation. Therefore, it has been removed from cellulosic biomass to produce high-value materials. However, lignin monomers can be converted to value-added chemicals such as biodegradable plastics and food additives by appropriately engineered microbes. Lignin degradation through peroxidase, laccase and other proteins with auxiliary activity is the first step in lignin valorization. Metabolic engineering of microorganisms for increased tolerance and production yield is the second step for lignin valorization. Here, this review offers a summary of current biotechnologies using various enzymatic activities, synergistic enzyme mixtures and metabolic engineering for lignin valorization in biorefinery.
Collapse
Affiliation(s)
- Sang Kyu Shin
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Young Jin Ko
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Jeong Eun Hyeon
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea; Department of Food Science and Biotechnology, College of Knowledge-Based Services Engineering, Sungshin Women's University, Seoul 01133, Republic of Korea; Department of Food and Nutrition, College of Health & Wellness, Sungshin Women's University, Seoul 01133, Republic of Korea
| | - Sung Ok Han
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea.
| |
Collapse
|