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Bucchieri D, Mangiagalli M, Martani F, Butti P, Lotti M, Serra I, Branduardi P. A novel laccase from Trametes polyzona with high performance in the decolorization of textile dyes. AMB Express 2024; 14:32. [PMID: 38506984 PMCID: PMC10954600 DOI: 10.1186/s13568-024-01687-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 03/04/2024] [Indexed: 03/22/2024] Open
Abstract
Laccases are multicopper oxidases able to oxidize several phenolic compounds and find application in numerous industrial applications. Among laccase producers, white-rot fungi represent a valuable source of multiple isoforms and isoenzymes of these multicopper oxidases. Here we describe the identification, biochemical characterization, and application of laccase 2 from Trametes polyzona (TP-Lac2), a basidiomycete fungus emerged among others that have been screened by plate assay. This enzyme has an optimal temperature of 50 °C and in acidic conditions it is able to oxidize both phenolic and non-phenolic compounds. The ability of TP-Lac2 to decolorize textile dyes was tested in the presence of natural and synthetic mediators at 30 °C and 50 °C. Our results indicate that TP-Lac2 most efficiently decolorizes (decolorization rate > 75%) malachite green oxalate, orange G, amido black10B and bromocresol purple in the presence of acetosyringone and 2,2'-azinobis (3-ethylbenzthiazoline-6-sulfonate)-ABTS. Overall, the laccase mediator system consisting of TP-Lac2 and the natural mediator acetosyringone has potential as an environmentally friendly alternative for wastewater treatment in the textile industry.
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Affiliation(s)
- Daniela Bucchieri
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126, Milano, Italy
- Department of Material Science and Nanotechnology, CORIMAV Program, University of Milano-Bicocca, Via R. Cozzi 55, 20125, Milano, Italy
| | - Marco Mangiagalli
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126, Milano, Italy
| | - Francesca Martani
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126, Milano, Italy
| | - Pietro Butti
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126, Milano, Italy
| | - Marina Lotti
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126, Milano, Italy
| | - Immacolata Serra
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126, Milano, Italy.
| | - Paola Branduardi
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza Della Scienza 2, 20126, Milano, Italy
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Aza P, Camarero S. Fungal Laccases: Fundamentals, Engineering and Classification Update. Biomolecules 2023; 13:1716. [PMID: 38136587 PMCID: PMC10741624 DOI: 10.3390/biom13121716] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 12/24/2023] Open
Abstract
Multicopper oxidases (MCOs) share a common catalytic mechanism of activation by oxygen and cupredoxin-like folding, along with some common structural determinants. Laccases constitute the largest group of MCOs, with fungal laccases having the greatest biotechnological applicability due to their superior ability to oxidize a wide range of aromatic compounds and lignin, which is enhanced in the presence of redox mediators. The adaptation of these versatile enzymes to specific application processes can be achieved through the directed evolution of the recombinant enzymes. On the other hand, their substrate versatility and the low sequence homology among laccases make their exact classification difficult. Many of the ever-increasing amounts of MCO entries from fungal genomes are automatically (and often wrongly) annotated as laccases. In a recent comparative genomic study of 52 basidiomycete fungi, MCO classification was revised based on their phylogeny. The enzymes clustered according to common structural motifs and theoretical activities, revealing three novel groups of laccase-like enzymes. This review provides an overview of the structure, catalytic activity, and oxidative mechanism of fungal laccases and how their biotechnological potential as biocatalysts in industry can be greatly enhanced by protein engineering. Finally, recent information on newly identified MCOs with laccase-like activity is included.
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Affiliation(s)
| | - Susana Camarero
- Margarita Salas Center for Biological Research, Consejo Superior de Investigaciones Científicas (CSIC), 28040 Madrid, Spain;
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3
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Xia Y, Lin X. Efficient biodegradation of straw and persistent organic pollutants by a novel strategy using recombinant Trichoderma reesei. BIORESOUR BIOPROCESS 2022; 9:91. [PMID: 38647641 PMCID: PMC10992801 DOI: 10.1186/s40643-022-00581-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/13/2022] [Indexed: 11/10/2022] Open
Abstract
Efficient biodegradation of lignocellulosic biomass needs a battery of enzymes targeting cellulose, hemicellulose, and lignin. In this study, recombinant Trichoderma reesei ZJ-09 with Pycnoporus sanguineus laccase gene was used to degrade rice straw by in situ production of laccase, xylanase, and cellulases under solid-state fermentation (SSF). Effects of parameters on key enzymes (cellulase, xylanase, and laccase) in biodegradation during SSF were investigated. Under the optimized SSF conditions, the FPA, xylanase activity, and laccase activity reached 110.47 FPU/g, 5787.59 IU/g, and 24.45 IU/g, respectively, on day 12. The obtained recombinant T. reesei SSF system achieved efficient degradation of rice straw with the final mass loss up to 51.16% which was 1.4-fold higher than the host strain. Further, bioconversion of rice straw into a novel laccase-enriched koji for persistent organic pollutants bioremediation (LKPB) was conducted by the optimized SSF system. LKPB was found to degrade persistent organic pollutants (POPs) effectively without the addition of mediators. 4-h removal rates of three POPs mediated by LKPB (87.21% for 2,4,5-trichlorophenol, 92.45% for nonylphenol, and 90.73% for oxytetracycline) were comparable to those achieved by laccase-co-mediator system. The newly established recombinant T. reesei SSF system could be potential to effectively degrade lignocellulosic wastes as well as organic pollutants.
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Affiliation(s)
- Ying Xia
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Xinda Lin
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.
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Role of Fungi in Bioremediation of Soil Contaminated with Persistent Organic Compounds. Fungal Biol 2021. [DOI: 10.1007/978-3-030-67561-5_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Fungal Secondary Metabolites for Bioremediation of Hazardous Heavy Metals. Fungal Biol 2021. [DOI: 10.1007/978-3-030-68260-6_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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The Use of Algae and Fungi for Removal of Pharmaceuticals by Bioremediation and Biosorption Processes: A Review. WATER 2019. [DOI: 10.3390/w11081555] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The occurrence and fate of pharmaceuticals in the aquatic environment is recognized as one of the emerging issues in environmental chemistry. Conventional wastewater treatment plants (WWTPs) are not designed to remove pharmaceuticals (and their metabolites) from domestic wastewaters. The treatability of pharmaceutical compounds in WWTPs varies considerably depending on the type of compound since their biodegradability can differ significantly. As a consequence, they may reach the aquatic environment, directly or by leaching of the sludge produced by these facilities. Currently, the technologies under research for the removal of pharmaceuticals, namely membrane technologies and advanced oxidation processes, have high operation costs related to energy and chemical consumption. When chemical reactions are involved, other aspects to consider include the formation of harmful reaction by-products and the management of the toxic sludge produced. Research is needed in order to develop economic and sustainable treatment processes, such as bioremediation and biosorption. The use of low-cost materials, such as biological matrices (e.g., algae and fungi), has advantages such as low capital investment, easy operation, low operation costs, and the non-formation of degradation by-products. An extensive review of existing research on this subject is presented.
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Bioremediation: New Prospects for Environmental Cleaning by Fungal Enzymes. RECENT ADVANCEMENT IN WHITE BIOTECHNOLOGY THROUGH FUNGI 2019. [DOI: 10.1007/978-3-030-25506-0_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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9
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Decolorization and detoxification of textile dyes using a versatile Streptomyces laccase-natural mediator system. Saudi J Biol Sci 2018; 26:913-920. [PMID: 31303819 PMCID: PMC6600735 DOI: 10.1016/j.sjbs.2018.05.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 05/08/2018] [Accepted: 05/17/2018] [Indexed: 11/24/2022] Open
Abstract
Currently, there is increasing interest in assessing the potential of bacterial laccases for industrial and environmental applications especially in harsh conditions. The environmental impact of the textile industry requires novel and effective technologies to mitigate the presence of dyes in wastewaters before discharging into the environment. Dyes usually remain stable in the presence of a variety of chemicals, light and are recalcitrant to microbial degradation. Among available technologies the biological treatments offer environmentally friendly strategies for decolorizing and detoxifying these compounds. The recent discovery of versatile laccases in streptomycetes opens up new opportunities for their commercial application. The aim of this study is to assess the potential of a novel bacterial laccase SilA produced by Streptomyces ipomoeae CECT 3341 active over wide temperature and pH ranges for use as an eco-friendly, biological treatment for the degradation of textile dyes. Insights into the enhancement of the oxidative action of this enzyme through the use of natural redox mediators are presented together with an assessment of the potential toxicity of the degradation products. Our results confirm that the combination of the laccase and natural mediators such as acetosyringone and methyl syringate enhanced the decolorization and detoxification of a variety of textile dyes up to sixfold and 20-fold, respectively. Mediator concentration was found to have a significant effect (p < 0.05) on dye decolorization at 60 °C; thus, the decolorization of Acid Orange 63 increased from 6 to 70-fold when the mediator concentration was increased from 0.1 to 0.5 mM. Further, the toxicity of tartrazine decreased 36-fold when the SilA-MeS system was used to decolorize the dye. The thermal properties of the SilA coupled with the stability of SilA at high pH suggest a potential commercial application for use in the decolorization of textile wastewaters which generally are performed at high temperature (>55 °C) and salinity and neutral pH, conditions which are unfavourable for conventional fungal laccases.
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Mate DM, Alcalde M. Laccase: a multi-purpose biocatalyst at the forefront of biotechnology. Microb Biotechnol 2017; 10:1457-1467. [PMID: 27696775 PMCID: PMC5658592 DOI: 10.1111/1751-7915.12422] [Citation(s) in RCA: 270] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 09/12/2016] [Accepted: 09/15/2016] [Indexed: 11/30/2022] Open
Abstract
Laccases are multicopper containing enzymes capable of performing one electron oxidation of a broad range of substrates. Using molecular oxygen as the final electron acceptor, they release only water as a by-product, and as such, laccases are eco-friendly, versatile biocatalysts that have generated an enormous biotechnological interest. Indeed, this group of enzymes has been used in different industrial fields for very diverse purposes, from food additive and beverage processing to biomedical diagnosis, and as cross-linking agents for furniture construction or in the production of biofuels. Laccases have also been studied intensely in nanobiotechnology for the development of implantable biosensors and biofuel cells. Moreover, their capacity to transform complex xenobiotics makes them useful biocatalysts in enzymatic bioremediation. This review summarizes the most significant recent advances in the use of laccases and their future perspectives in biotechnology.
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Affiliation(s)
- Diana M. Mate
- Department of BiocatalysisInstitute of CatalysisCSICCantoblanco28049MadridSpain
| | - Miguel Alcalde
- Department of BiocatalysisInstitute of CatalysisCSICCantoblanco28049MadridSpain
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Yang J, Li W, Ng TB, Deng X, Lin J, Ye X. Laccases: Production, Expression Regulation, and Applications in Pharmaceutical Biodegradation. Front Microbiol 2017; 8:832. [PMID: 28559880 PMCID: PMC5432550 DOI: 10.3389/fmicb.2017.00832] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/24/2017] [Indexed: 01/08/2023] Open
Abstract
Laccases are a family of copper-containing oxidases with important applications in bioremediation and other various industrial and biotechnological areas. There have been over two dozen reviews on laccases since 2010 covering various aspects of this group of versatile enzymes, from their occurrence, biochemical properties, and expression to immobilization and applications. This review is not intended to be all-encompassing; instead, we highlighted some of the latest developments in basic and applied laccase research with an emphasis on laccase-mediated bioremediation of pharmaceuticals, especially antibiotics. Pharmaceuticals are a broad class of emerging organic contaminants that are recalcitrant and prevalent. The recent surge in the relevant literature justifies a short review on the topic. Since low laccase yields in natural and genetically modified hosts constitute a bottleneck to industrial-scale applications, we also accentuated a genus of laccase-producing white-rot fungi, Cerrena, and included a discussion with regards to regulation of laccase expression.
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Affiliation(s)
- Jie Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Wenjuan Li
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Tzi Bun Ng
- Faculty of Medicine, School of Biomedical Sciences, The Chinese University of Hong KongShatin, Hong Kong
| | - Xiangzhen Deng
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Juan Lin
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Xiuyun Ye
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
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12
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Yang J, Lin Y, Yang X, Ng TB, Ye X, Lin J. Degradation of tetracycline by immobilized laccase and the proposed transformation pathway. JOURNAL OF HAZARDOUS MATERIALS 2017; 322:525-531. [PMID: 27776862 DOI: 10.1016/j.jhazmat.2016.10.019] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/06/2016] [Accepted: 10/10/2016] [Indexed: 06/06/2023]
Abstract
Magnetic cross-linked enzyme aggregates (M-CLEAs) were prepared for Cerrena laccase and used in antibiotic treatment. Of the seven antibiotics examined in this study, Cerrena laccase M-CLEAs were most effective in degradation of tetracycline (TC) and oxytetracycline (OTC), followed by ampicillin, sulfamethoxazole and erythromycin. The redox mediator ABTS was not able to improve efficiencies of degradation of TC and OTC. Cerrena laccase at 40U/mL eliminated 100μg/mL TC at pH 6 and 25°C in 48h in the absence of a redox mediator, with over 80% degradation occurring within the first 12h. Laccase treatment also significantly suppressed the antimicrobial activity of TC and OTC. Three TC transformation products, the levels of which initially increased and subsequently decreased during laccase treatment were identified by using LC-TOF MS. A mechanism of laccase-mediated TC oxidation was proposed based on the identified intermediates.
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Affiliation(s)
- Jie Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fujian 350116, China.
| | - Yonghui Lin
- Technical Center, Fujian Entry-Exit Inspection and Quarantine Bureau, Fuzhou, Fujian 350001, China
| | - Xiaodan Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fujian 350116, China
| | - Tzi Bun Ng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Xiuyun Ye
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fujian 350116, China
| | - Juan Lin
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fujian 350116, China.
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13
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Deshmukh R, Khardenavis AA, Purohit HJ. Diverse Metabolic Capacities of Fungi for Bioremediation. Indian J Microbiol 2016; 56:247-64. [PMID: 27407289 PMCID: PMC4920763 DOI: 10.1007/s12088-016-0584-6] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 04/12/2016] [Indexed: 11/30/2022] Open
Abstract
Bioremediation refers to cost-effective and environment-friendly method for converting the toxic, recalcitrant pollutants into environmentally benign products through the action of various biological treatments. Fungi play a major role in bioremediation owing to their robust morphology and diverse metabolic capacity. The review focuses on different fungal groups from a variety of habitats with their role in bioremediation of different toxic and recalcitrant compounds; persistent organic pollutants, textile dyes, effluents from textile, bleached kraft pulp, leather tanning industries, petroleum, polyaromatic hydrocarbons, pharmaceuticals and personal care products, and pesticides. Bioremediation of toxic organics by fungi is the most sustainable and green route for cleanup of contaminated sites and we discuss the multiple modes employed by fungi for detoxification of different toxic and recalcitrant compounds including prominent fungal enzymes viz., catalases, laccases, peroxidases and cyrochrome P450 monooxygeneses. We have also discussed the recent advances in enzyme engineering and genomics and research being carried out to trace the less understood bioremediation pathways.
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Affiliation(s)
- Radhika Deshmukh
- Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440020 India
| | - Anshuman A. Khardenavis
- Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440020 India
| | - Hemant J. Purohit
- Environmental Genomics Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440020 India
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Pardo I, Camarero S. Exploring the Oxidation of Lignin-Derived Phenols by a Library of Laccase Mutants. Molecules 2015; 20:15929-43. [PMID: 26364626 PMCID: PMC6332420 DOI: 10.3390/molecules200915929] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 08/18/2015] [Accepted: 08/26/2015] [Indexed: 11/17/2022] Open
Abstract
Saturation mutagenesis was performed over six residues delimiting the substrate binding pocket of a fungal laccase previously engineered in the lab. Mutant libraries were screened using sinapic acid as a model substrate, and those mutants presenting increased activity were selected for exploring the oxidation of lignin-derived phenols. The latter comprised a battery of phenolic compounds of interest due to their use as redox mediators or precursors of added-value products and their biological activity. The new laccase variants were investigated in a multi-screening assay and the structural determinants, at both the substrate and the protein level, for the oxidation of the different phenols are discussed. Laccase activity greatly varied only by changing one or two residues of the enzyme pocket. Our results suggest that once the redox potential threshold is surpassed, the contribution of the residues of the enzymatic pocket for substrate recognition and binding strongly influence the overall rate of the catalytic reaction.
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Affiliation(s)
- Isabel Pardo
- Centro de Investigaciones Biológicas (CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain.
| | - Susana Camarero
- Centro de Investigaciones Biológicas (CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain.
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15
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Krings U, Esparan V, Berger RG. The taste enhancer divanillin: a review on sources and enzymatic generation. FLAVOUR FRAG J 2015. [DOI: 10.1002/ffj.3251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ulrich Krings
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried Wilhelm Leibniz University Hannover; Callinstrasse 5 D-30167 Hannover Germany
| | - Vida Esparan
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried Wilhelm Leibniz University Hannover; Callinstrasse 5 D-30167 Hannover Germany
| | - Ralf G. Berger
- Institut für Lebensmittelchemie im Zentrum Angewandte Chemie; Gottfried Wilhelm Leibniz University Hannover; Callinstrasse 5 D-30167 Hannover Germany
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Gonçalves I, Herrero-Yniesta V, Perales Arce I, Escrigas Castañeda M, Cavaco-Paulo A, Silva C. Ultrasonic pilot-scale reactor for enzymatic bleaching of cotton fabrics. ULTRASONICS SONOCHEMISTRY 2014; 21:1535-1543. [PMID: 24618529 DOI: 10.1016/j.ultsonch.2014.02.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 01/16/2014] [Accepted: 02/11/2014] [Indexed: 06/03/2023]
Abstract
The potential of ultrasound-assisted technology has been demonstrated by several laboratory scale studies. However, their successful industrial scaling-up is still a challenge due to the limited pilot and commercial sonochemical reactors. In this work, a pilot reactor for laccase-hydrogen peroxide cotton bleaching assisted by ultrasound was scaled-up. For this purpose, an existing dyeing machine was transformed and adapted by including piezoelectric ultrasonic devices. Laboratory experiments demonstrated that both low frequency, high power (22 kHz, 2100 W) and high frequency, low power ultrasounds (850 kHz, 400 W) were required to achieve satisfactory results. Standard half (4 g/L H2O2 at 90 °C for 60 min) and optical (8 g/L H2O2 at 103 °C for 40 min) cotton bleaching processes were used as references. Two sequential stages were established for cotton bleaching: (1) laccase pretreatment assisted by high frequency ultrasound (850 kHz, 400 W) and (2) bleaching using high power ultrasound (22 kHz, 2100 W). When compared with conventional methods, combined laccase-hydrogen peroxide cotton bleaching with ultrasound energy improved the whitening effectiveness. Subsequently, less energy (temperature) and chemicals (hydrogen peroxide) were needed for cotton bleaching thus resulting in costs reduction. This technology allowed the combination of enzyme and hydrogen peroxide treatment in a continuous process. The developed pilot-scale reactor offers an enhancement of the cotton bleaching process with lower environmental impact as well as a better performance of further finishing operations.
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Affiliation(s)
- Idalina Gonçalves
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - Victor Herrero-Yniesta
- Centre de Recerca i Innovació de Catalunya, C/Vìctor Pradera 45, 08940 Cornellá de Llobregat, Barcelona, Spain
| | - Iratxe Perales Arce
- Centre de Recerca i Innovació de Catalunya, C/Vìctor Pradera 45, 08940 Cornellá de Llobregat, Barcelona, Spain
| | - Monica Escrigas Castañeda
- Centre de Recerca i Innovació de Catalunya, C/Vìctor Pradera 45, 08940 Cornellá de Llobregat, Barcelona, Spain
| | - Artur Cavaco-Paulo
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
| | - Carla Silva
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; 3B's Research Group, Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, S. Cláudio de Barco, 4806-909 Taipas, Guimarães, Portugal.
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Saparrat MCN, Balatti PA, Arambarri AM, Martínez MJ. Coriolopsis rigida, a potential model of white-rot fungi that produce extracellular laccases. J Ind Microbiol Biotechnol 2014; 41:607-17. [DOI: 10.1007/s10295-014-1408-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 01/20/2014] [Indexed: 11/28/2022]
Abstract
Abstract
In the last two decades, a significant amount of work aimed at studying the ability of the white-rot fungus Coriolopsis rigida strain LPSC no. 232 to degrade lignin, sterols, as well as several hazardous pollutants like dyes and aliphatic and aromatic fractions of crude oil, including polycyclic aromatic hydrocarbons, has been performed. Additionally, C. rigida in association with arbuscular mycorrhizal fungi appears to enhance plant growth, albeit the physiological and molecular bases of this effect remain to be elucidated. C. rigida's ability to degrade lignin and lignin-related compounds and the capacity to transform the aromatic fraction of crude oil in the soil might be partially ascribed to its ligninolytic enzyme system. Two extracellular laccases are the only enzymatic components of its lignin-degrading system. We reviewed the most relevant findings regarding the activity and role of C. rigida LPSC no. 232 and its laccases and discussed the work that remains to be done in order to assess, more precisely, the potential use of this fungus and its extracellular enzymes as a model in several applied processes.
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Affiliation(s)
- Mario C N Saparrat
- grid.9499.d 0000000120973940 Instituto de Fisiología Vegetal (INFIVE) Universidad Nacional de La Plata (UNLP)-CCT-La Plata-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Diag. 113 y 61, CC 327 1900 La Plata Argentina
- grid.9499.d 0000000120973940 Facultad de Ciencias Naturales y Museo Instituto de Botánica Spegazzini, UNLP 53 # 477 1900 La Plata Argentina
- grid.9499.d 0000000120973940 Cátedra de Microbiología Agrícola Facultad de Ciencias Agrarias y Forestales, UNLP 60 y 119 1900 La Plata Argentina
| | - Pedro A Balatti
- grid.9499.d 0000000120973940 Cátedra de Microbiología Agrícola Facultad de Ciencias Agrarias y Forestales, UNLP 60 y 119 1900 La Plata Argentina
- grid.501763.6 0000 0004 1757 289X INFIVE, UNLP-CCT-La Plata-CONICET Diag. 113 y 61, CC 327 1900 La Plata Argentina
- grid.9499.d 0000 0001 2097 3940 Facultad de Ciencias Agrarias y Forestales Centro de Investigaciones de Fitopatología (CIDEFI), UNLP 60 y 119 1900 La Plata Argentina
| | - Angélica M Arambarri
- grid.9499.d 0000000120973940 Facultad de Ciencias Naturales y Museo Instituto de Botánica Spegazzini, UNLP 53 # 477 1900 La Plata Argentina
| | - María J Martínez
- grid.418281.6 0000000417940752 Centro de Investigaciones Biológicas, CSIC Ramiro de Maeztu 9 28040 Madrid Spain
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Mogharabi M, Faramarzi MA. Laccase and Laccase-Mediated Systems in the Synthesis of Organic Compounds. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300960] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Pardo I, Chanagá X, Vicente AI, Alcalde M, Camarero S. New colorimetric screening assays for the directed evolution of fungal laccases to improve the conversion of plant biomass. BMC Biotechnol 2013; 13:90. [PMID: 24159930 PMCID: PMC4015961 DOI: 10.1186/1472-6750-13-90] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Accepted: 10/23/2013] [Indexed: 11/20/2022] Open
Abstract
Background Fungal laccases are multicopper oxidases with huge applicability in different sectors. Here, we describe the development of a set of high-throughput colorimetric assays for screening laccase libraries in directed evolution studies. Results Firstly, we designed three colorimetric assays based on the oxidation of sinapic acid, acetosyringone and syringaldehyde with λmax of 512, 520 and 370 nm, respectively. These syringyl-type phenolic compounds are released during the degradation of lignocellulose and can act as laccase redox mediators. The oxidation of the three compounds by low and high-redox potential laccases evolved in Saccharomyces cerevisiae produced quantifiable and linear responses, with detection limits around 1 mU/mL and CV values below 16%. The phenolic substrates were also suitable for pre-screening mutant libraries on solid phase format. Intense colored-halos were developed around the yeast colonies secreting laccase. Furthermore, the oxidation of violuric acid to its iminoxyl radical (λmax of 515 nm and CV below 15%) was devised as reporter assay for laccase redox potential during the screening of mutant libraries from high-redox potential laccases. Finally, we developed three dye-decolorizing assays based on the enzymatic oxidation of Methyl Orange (470 nm), Evans Blue (605 nm) and Remazol Brilliant Blue (640 nm) giving up to 40% decolorization yields and CV values below 18%. The assays were reliable for direct measurement of laccase activity or to indirectly explore the oxidation of mediators that do not render colored products (but promote dye decolorization). Every single assay reported in this work was tested by exploring mutant libraries created by error prone PCR of fungal laccases secreted by yeast. Conclusions The high-throughput screening methods reported in this work could be useful for engineering laccases for different purposes. The assays based on the oxidation of syringyl-compounds might be valuable tools for tailoring laccases precisely enhanced to aid biomass conversion processes. The violuric assay might be useful to preserve the redox potential of laccase whilst evolving towards new functions. The dye-decolorizing assays are useful for engineering ad hoc laccases for detoxification of textile wastewaters, or as indirect assays to explore laccase activity on other natural mediators.
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Affiliation(s)
| | | | | | | | - Susana Camarero
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain.
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Du X, Li J, Gellerstedt G, Rencoret J, Del Río JC, Martínez AT, Gutiérrez A. Understanding Pulp Delignification by Laccase–Mediator Systems through Isolation and Characterization of Lignin–Carbohydrate Complexes. Biomacromolecules 2013; 14:3073-80. [DOI: 10.1021/bm4006936] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xueyu Du
- Department of Fibre and Polymer
Technology, Royal Institute of Technology, KTH, Teknikringen 56-58, SE-10044 Stockholm, Sweden
| | - Jiebing Li
- Department of Fibre and Polymer
Technology, Royal Institute of Technology, KTH, Teknikringen 56-58, SE-10044 Stockholm, Sweden
| | - Göran Gellerstedt
- Department of Fibre and Polymer
Technology, Royal Institute of Technology, KTH, Teknikringen 56-58, SE-10044 Stockholm, Sweden
| | - Jorge Rencoret
- Instituto de Recursos Naturales
y Agrobiología de Sevilla, CSIC,
P.O. Box 1052, E-41080 Seville, Spain
| | - José C. Del Río
- Instituto de Recursos Naturales
y Agrobiología de Sevilla, CSIC,
P.O. Box 1052, E-41080 Seville, Spain
| | - Angel T. Martínez
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Ana Gutiérrez
- Instituto de Recursos Naturales
y Agrobiología de Sevilla, CSIC,
P.O. Box 1052, E-41080 Seville, Spain
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Valls C, Cadena EM, Blanca Roncero M. Obtaining biobleached eucalyptus cellulose fibres by using various enzyme combinations. Carbohydr Polym 2013; 92:276-82. [DOI: 10.1016/j.carbpol.2012.08.083] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 07/25/2012] [Accepted: 08/23/2012] [Indexed: 10/27/2022]
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