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Chen M, Waigi MG, Li S, Sun K, Si Y. Fungal laccase-mediated humification of estrogens in aquatic ecosystems. WATER RESEARCH 2019; 166:115040. [PMID: 31505307 DOI: 10.1016/j.watres.2019.115040] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 08/16/2019] [Accepted: 09/01/2019] [Indexed: 06/10/2023]
Abstract
Estrogens are a category of non-degradable organic pollutants prevalent in aquatic environments with reported health risks in human and wildlife reproduction. A biotechnological approach is proposed for utilizing fungal laccase-mediated humification reactions (L-MHRs) to remove estrogens from water. Through a reactive radical-mediated C-C, C-O-C, or C-N-C covalent coupling mechanism, multifarious complex polymeric structures are generated having limited solubilities, which significantly reduces their estrogenic activity and ecotoxicity. This review highlights the available literature associated with the self/cross-coupling mechanism of fungal L-MHRs in catalyzing the single-electron oxidation of estrogens and humic acid (HA). Advances in identifying unknown estrogen-HA cross-coupling products using high-resolution mass spectrometry combined with 13C-isotope labeling and 13C NMR may provide key research directions beneficial to aquatic ecological restoration measures.
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Affiliation(s)
- Mingyu Chen
- Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, China
| | - Michael Gatheru Waigi
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shunyao Li
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kai Sun
- Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, China.
| | - Youbin Si
- Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, China
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2
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Bilal M, Rasheed T, Nabeel F, Iqbal HMN, Zhao Y. Hazardous contaminants in the environment and their laccase-assisted degradation - A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 234:253-264. [PMID: 30634118 DOI: 10.1016/j.jenvman.2019.01.001] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 12/18/2018] [Accepted: 01/02/2019] [Indexed: 02/05/2023]
Abstract
In recent years, owing to the serious ecological risks and human health-related adverse effects, the wide occurrence of hazardous contaminants along with their potential to enter the environment have gained great public concerns. In this context, significant actions are urgently required to tackle the ignorance and inefficient monitoring/removal of emerging/(re)-emerging contaminants (ECs) in the environment from different routes of concerns, i.e., industrial waste, pharmaceutical, personal care products (PCPs), toxic effluents, etc. Laccases are multinuclear copper-containing oxidoreductases and can carry out one electron oxidation of a broad spectrum of environmentally related contaminants. In biotechnology, this group of versatile enzymes is known as a green catalyst/green tool with enormous potentialities to tackle ECs of high concern. In this review, we endeavored to present up-to-date literature concerning the potential use of immobilized laccases for the degradation and remediation of various types of environmental pollutants present in the environment. Both, pristine and immobilized, laccases have shown great capacity to oxidative degradation and mineralization of endocrine disrupting chemicals (EDs) in batch treatment processes as well as in large-scale continuous reactors. These properties make laccase as particularly attractive biocatalysts in environmental remediation processes, and their use might be advantageous over the conventional treatments. This review summarizes the most significant recent advances in the use of laccases and their future perspectives in environmental biotechnology.
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Affiliation(s)
- Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Tahir Rasheed
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Faran Nabeel
- School of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L., CP 64849, Mexico.
| | - Yuping Zhao
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China.
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3
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Cusola O, Valls C, Vidal T, Roncero MB. Using Electrochemical Methods To Study the Kinetics of Laccase-Catalyzed Oxidation of Phenols. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04842] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oriol Cusola
- CELBIOTECH_Paper
Engineering Research Group, Universitat Politècnica de Catalunya-BarcelonaTech, Colom 11, E-08222 Terrassa, Spain
| | - Cristina Valls
- CELBIOTECH_Paper
Engineering Research Group, Universitat Politècnica de Catalunya-BarcelonaTech, Colom 11, E-08222 Terrassa, Spain
| | - Teresa Vidal
- CELBIOTECH_Paper
Engineering Research Group, Universitat Politècnica de Catalunya-BarcelonaTech, Colom 11, E-08222 Terrassa, Spain
| | - M. Blanca Roncero
- CELBIOTECH_Paper
Engineering Research Group, Universitat Politècnica de Catalunya-BarcelonaTech, Colom 11, E-08222 Terrassa, Spain
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4
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Afrin S, Karim Z. Isolation and Surface Modification of Nanocellulose: Necessity of Enzymes over Chemicals. CHEMBIOENG REVIEWS 2017. [DOI: 10.1002/cben.201600001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Sadaf Afrin
- Aligarh Muslim University; Faculty of Science; Department of Chemistry; 202002 Aligarh India
| | - Zoheb Karim
- MoRe Research Örnsköldsvik AB; Box 70 891 22 Örnsköldsvik Sweden
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Yang H, Sun H, Zhang S, Wu B, Pan B. Potential of acetylacetone as a mediator for Trametes versicolor laccase in enzymatic transformation of organic pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:10882-10889. [PMID: 25772881 DOI: 10.1007/s11356-015-4312-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 03/02/2015] [Indexed: 06/04/2023]
Abstract
Low-cost and environmentally friendly mediators could facilitate the application of laccase (EC 1.10.3.2) in variant biotechnological processes. Acetylacetone (AA) represents an inexpensive and low toxic small molecular diketone that has been proven as an effective mediator for laccase in free radical polymerization. However, the potential of AA as a mediator for laccase in pollutant detoxification and/or degradation is still unknown. In this work, the roles of AA in laccase-induced polymerization and transformation were investigated. AA was demonstrated to be a highly efficient mediator in the laccase-induced grafting copolymerization of acrylamide and chitosan. The efficacy of AA in the laccase-induced decoloration of malachite green (MG) was compared with that of the widely used 1-hydroxybenzotriazole (HBT). The laccase-AA system had the highest turnover number (TON, 39.1 μmol/U), followed by the laccase-only system (28.5 μmol/U), while the TON of the laccase-HBT system was the lowest (14.9 μmol/U). The pseudo-first-order transformation rate constant (k 1) of MG in the laccase-AA system was up to 0.283 h(-1) under the given conditions, while the k 1 of AA caused by laccase was only 0.008 h(-1). In the five-cycle run, the concentration of AA remained stable. The larger TON of the laccase-AA system and the stability of AA in the cycling runs demonstrate that AA was more recyclable than HBT in the LMS, leading to a prolonged serving life of laccase. These results suggest that AA might be a potential redox mediator for laccase.
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Affiliation(s)
- Hua Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
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6
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Skybová T, Přibyl M, Hasal P. Mathematical model of decolourization in a rotating disc reactor. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2014.09.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Bacterial Enzymes and Multi-enzymatic Systems for Cleaning-up Dyes from the Environment. MICROBIAL DEGRADATION OF SYNTHETIC DYES IN WASTEWATERS 2015. [DOI: 10.1007/978-3-319-10942-8_2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Rodríguez FA, Mateo MN, Aceves JM, Rivero EP, González I. Electrochemical oxidation of bio-refractory dye in a simulated textile industry effluent using DSA electrodes in a filter-press type FM01-LC reactor. ENVIRONMENTAL TECHNOLOGY 2013; 34:573-583. [PMID: 23837306 DOI: 10.1080/09593330.2012.706645] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This work presents a study on degradation of indigo carmine dye in a filter-press type FM01-LC reactor using Sb2O5-doped Ti/IrO2-SnO2 dimensionally stable anode (DSA) electrodes. Micro- and macroelectrolysis studies were carried out using solutions of 0.8 mM indigo carmine in 0.05 M NaCl, which resemble blue denim laundry industrial wastewater. Microelectrolysis results show the behaviour of DSA electrodes in comparison with the behaviour of boron-doped diamond (BDD) electrodes. In general, dye degradation reactions are carried out indirectly through active chlorine generated on DSA, whereas in the case of BDD electrodes more oxidizing species are formed, mainly OH radicals, on the electrode surface. The well-characterized geometry, flow pattern and mass transport of the FM01-LC reactor used in macroelectrolysis experiments allowed the evaluation of the effect of hydrodynamic conditions on the chlorine-mediated degradation rate. Four values of Reynolds number (Re) (93, 371, 464 and 557) at four current densities (50, 100, 150 and 200 A/m2) were tested. The results show that the degradation rate is independent of Re at low current density (50 A/m2) but becomes dependent on the Re at high current density (200 A/m2). This behaviour shows the central role of mass transport and the reactor parameters and design. The low energy consumption (2.02 and 9.04 kWh/m3 for complete discolouration and chemical oxygen demand elimination at 50 A/m2, respectively) and the low cost of DSA electrodes compared to BDD make DSA electrodes promising for practical application in treating industrial textile effluents. In the present study, chlorinated organic compounds were not detected.
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Affiliation(s)
- Francisca A Rodríguez
- Departamento de Ingeniería y Tecnología, Universidad Nacional Autónoma de México, FES Cuautitán, Cuautitlán Izcalli, Edo. México, México
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9
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Demarche P, Junghanns C, Nair RR, Agathos SN. Harnessing the power of enzymes for environmental stewardship. Biotechnol Adv 2012; 30:933-53. [DOI: 10.1016/j.biotechadv.2011.05.013] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Accepted: 05/13/2011] [Indexed: 11/17/2022]
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10
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Laccase Production and Enzymatic Modification of Lignin by a Novel Peniophora sp. Appl Biochem Biotechnol 2011; 166:1082-94. [DOI: 10.1007/s12010-011-9496-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Accepted: 12/11/2011] [Indexed: 11/27/2022]
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11
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Mendes S, Farinha A, Ramos CG, Leitão JH, Viegas CA, Martins LO. Synergistic action of azoreductase and laccase leads to maximal decolourization and detoxification of model dye-containing wastewaters. BIORESOURCE TECHNOLOGY 2011; 102:9852-9. [PMID: 21890348 DOI: 10.1016/j.biortech.2011.07.108] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 07/22/2011] [Accepted: 07/29/2011] [Indexed: 05/16/2023]
Abstract
The azoreductase PpAzoR from Pseudomonas putida shows a broader specificity for decolourization of azo dyes than CotA-laccase from Bacillus subtilis. However, the final products of PpAzoR activity exhibited in most cases a 2 to 3-fold higher toxicity than intact dyes themselves. We show that addition of CotA-laccase to PpAzoR reaction mixtures lead to a significant drop in the final toxicity. A sequential enzymatic process was validated through the use of 18 representative azo dyes and three model wastewaters that mimic real dye-containing effluents. A heterologous Escherichia coli strain was successfully constructed co-expressing the genes coding for both PpAzoR and CotA. Whole-cell assays of recombinant strain for the treatment of model dye wastewater resulted in decolourization levels above 80% and detoxification levels up to 50%. The high attributes of this strain, make it a promising candidate for the biological treatment of industrial dye containing effluents.
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Affiliation(s)
- Sónia Mendes
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
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Polak J, Jarosz-Wilkolazka A. Structure/redox potential relationship of simple organic compounds as potential precursors of dyes for laccase-mediated transformation. Biotechnol Prog 2011; 28:93-102. [PMID: 21990279 DOI: 10.1002/btpr.713] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 08/29/2011] [Indexed: 11/12/2022]
Abstract
The aim of this study was to examine the ability of an extracellular fungal laccase (LAC) to form colored products from simple non-colored organic precursors. Thirty different phenolic and non-phenolic precursors (o-, m-, and p-methoxy-, hydroxy-, sulfonic-, and amino-substituted) were tested as single and coupled substrates in a LAC-catalyzed oxidation. The findings show that LAC catalyzes the formation of colored products (from yellow/brown to red and blue) by oxidation of single substrates that are benzene derivatives containing at least two substituents comprised of amino, hydroxy, and methoxy groups. All precursors were tested by cyclic voltammetry and the correlation between their structure and redox potential, and the possibility of their transformation into colored products by fungal LAC was found. Colored products were yielded from single substrates possessing a value of the oxidation peak (E(o)) lower than 1,150 mV vs. normal hydrogen electrode (NHE). Substrates with an oxidation peak higher than 1,150 mV vs. NHE were transformed by LAC into colored compounds only in the presence of an additional precursor characterized by a low value of E(o) and the presence of reactive substituents such as methoxy, hydroxy, and amino groups. Therefore, additional hydroxylation, methoxylation, and amination of phenolic and non-phenolic substrates may represent a strategy to increase the range of these compounds as potential dyes precursors.
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Affiliation(s)
- Jolanta Polak
- Biochemistry Department, Maria Curie-Sklodowska University, Akademicka 19, 20-033 Lublin, Poland.
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13
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Potential applications of laccase-mediated coupling and grafting reactions: A review. Enzyme Microb Technol 2011; 48:195-208. [DOI: 10.1016/j.enzmictec.2010.11.007] [Citation(s) in RCA: 237] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2010] [Revised: 11/02/2010] [Accepted: 11/23/2010] [Indexed: 11/21/2022]
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14
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Munteanu FD, Cavaco-Paulo A. Biosensors Based on Laccase for Detection of Commercially Reactive Dyes. ANAL LETT 2010. [DOI: 10.1080/00032710903518567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Ranieri D, Colao MC, Ruzzi M, Romagnoli G, Bianchi MM. Optimization of recombinant fungal laccase production with strains of the yeastKluyveromyces lactisâfrom the pyruvate decarboxylase promoter. FEMS Yeast Res 2009; 9:892-902. [DOI: 10.1111/j.1567-1364.2009.00532.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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16
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Díaz Blanco C, González MD, Monmany JMD, Tzanov T. Dyeing properties, synthesis, isolation and characterization of an in situ generated phenolic pigment, covalently bound to cotton. Enzyme Microb Technol 2009. [DOI: 10.1016/j.enzmictec.2009.02.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Moldes D, Díaz M, Tzanov T, Vidal T. Comparative study of the efficiency of synthetic and natural mediators in laccase-assisted bleaching of eucalyptus kraft pulp. BIORESOURCE TECHNOLOGY 2008; 99:7959-65. [PMID: 18499450 DOI: 10.1016/j.biortech.2008.04.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2008] [Revised: 03/31/2008] [Accepted: 04/03/2008] [Indexed: 05/03/2023]
Abstract
The natural phenolic compounds syringaldehyde and vanillin were compared to the synthetic mediators 1-hydroxybenzotriazole, violuric acid and promazine in terms of boosting efficiency in a laccase-assisted biobleaching of eucalyptus kraft pulp. Violuric acid and 1-hydroxybenzotriazole revealed to be the most effective mediators of the bioprocess. Nevertheless, laccase-syringaldehyde system also improved the final pulp properties (28% delignification and 63.5% ISO brightness) compared to the process without mediator (23% and 61.5% respectively), in addition to insignificant denaturation effect over laccase. The efficiency of the biobleaching process was further related to changes in non-conventionally used optical and chromatic parameters of pulp, such as (L*), chroma (C*) and dye removal index (DRI) showing good correlation. Adverse coupling reactions of the natural phenolic mediators on pulp lignin were predicted by electrochemical studies, demonstrating the complexity of the laccase-mediator reaction on pulp.
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Affiliation(s)
- D Moldes
- Department of Textile and Paper Engineering, Universitat Politècnica de Catalunya, Colom 11, E-08222 Terrassa, Spain.
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18
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Pereira L, Coelho AV, Viegas CA, Santos MMCD, Robalo MP, Martins LO. Enzymatic biotransformation of the azo dye Sudan Orange G with bacterial CotA-laccase. J Biotechnol 2008; 139:68-77. [PMID: 18938200 DOI: 10.1016/j.jbiotec.2008.09.001] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2008] [Revised: 09/08/2008] [Accepted: 09/16/2008] [Indexed: 11/17/2022]
Abstract
In the present study we show that recombinant bacterial CotA-laccase from Bacillus subtilis is able to decolourise, at alkaline pH and in the absence of redox mediators, a variety of structurally different synthetic dyes. The enzymatic biotransformation of the azo dye Sudan Orange G (SOG) was addressed in more detail following a multidisciplinary approach. Biotransformation proceeds in a broad span of temperatures (30-80 degrees C) and more than 98% of Sudan Orange G is decolourised within 7h by using 1 U mL(-1) of CotA-laccase at 37 degrees C. The bell-shape pH profile of the enzyme with an optimum at 8, is in agreement with the pH dependence of the dye oxidation imposed by its acid-basic behavior as measured by potentiometric and electrochemical experiments. Seven biotransformation products were identified using high-performance liquid chromatography and mass spectrometry and a mechanistic pathway for the azo dye conversion by CotA-laccase is proposed. The enzymatic oxidation of the Sudan Orange G results in the production of oligomers and, possibly polymers, through radical coupling reactions. A bioassay based on inhibitory effects over the growth of Saccharomyces cerevisiae shows that the enzymatic bioremediation process reduces 3-fold the toxicity of Sudan Orange G.
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Affiliation(s)
- Luciana Pereira
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
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Camarero S, Cañas AI, Nousiainen P, Record E, Lomascolo A, Martínez MJ, Martínez AT. P-hydroxycinnamic acids as natural mediators for laccase oxidation of recalcitrant compounds. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2008; 42:6703-9. [PMID: 18800552 DOI: 10.1021/es8008979] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The capabilities of p-coumaric acid (PCA), ferulic acid (FA), and sinapic acid (SA) as laccase mediators are compared in oxidation of industrial dyes and polycyclic aromatic hydrocarbons (PAH). SA behaved as highly efficient mediator in decolorization of dyes, including the recalcitrant Reactive Black 5. This mediating capacity was related to the specificity constant of the enzyme oxidizing this p-hydroxycinnamic acid, which was 16 times higher than for the typical substrate 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS). The kinetics of ABTS oxidation by laccase in the presence of p-hydroxycinnamic acids suggested that the stable phenoxyl radical of a SA transformation product acts as laccase mediator. On the other hand, FA and, especially PCA, easily mediated benzo[a]pyrene oxidation, the latter also promoting the oxidation of the more recalcitrant phenanthrene. Phenanthrene transformation by laccase-PCA was enhanced by Tween 80. This fact, together with the detection of TBARS (thiobarbituric acid-reactive-substances) from unsaturated fatty acids, revealed that laccase can also initiate lipid peroxidation reactions in the presence of p-hydroxycinnamic acids enabling oxidation of the most recalcitrant PAH.
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Affiliation(s)
- Susana Camarero
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain.
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Gallaway JW, Calabrese Barton SA. Kinetics of Redox Polymer-Mediated Enzyme Electrodes. J Am Chem Soc 2008; 130:8527-36. [DOI: 10.1021/ja0781543] [Citation(s) in RCA: 150] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joshua W. Gallaway
- Department of Chemical Engineering, Columbia University, New York, New York 10027, and Department of Chemical Engineering and Material Science, Michigan State University, East Lansing, Michigan 48824
| | - Scott A. Calabrese Barton
- Department of Chemical Engineering, Columbia University, New York, New York 10027, and Department of Chemical Engineering and Material Science, Michigan State University, East Lansing, Michigan 48824
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Niladevi KN, Sheejadevi PS, Prema P. Strategies for enhancing laccase yield from Streptomyces psammoticus and its role in mediator-based decolorization of azo dyes. Appl Biochem Biotechnol 2008; 151:9-19. [PMID: 18473186 DOI: 10.1007/s12010-008-8175-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Accepted: 02/04/2008] [Indexed: 11/27/2022]
Abstract
Enhanced production of laccases from Streptomyces psammoticus in solid-state fermentation was carried out using two different strategies: laccase inducers and scale-up process. Laccase yield was enhanced by a wide range of aromatic inducers. The best inducer was pyrogallol, which yielded 116 U/g as compared to the control (55.4 U/g). Scale-up studies in packed bed bioreactor was performed at different aeration rates. Aeration at 1.5 vvm was identified as the optimum condition for laccase production (75.4 U/g) in the column bioreactor. The enzyme yield was enhanced further by combining the best conditions from the first two experiments. Fermentation was carried out in bioreactors in the presence of 1 mM pyrogallol, which resulted in 3.9-fold increase in laccase yield (215.6 U/g). The role of laccase in azo dye decolorization was evaluated in the presence of four different laccase mediators, at different concentrations. 1-Hydroxybenzotriazole (HOBT) proved to be the best mediator for S. psammoticus laccase and decolorized the azo dyes efficiently. Acid orange, Methyl orange, and Bismarck brown were decolorized at the rates of 86%, 71%, and 75% respectively, by HOBT.
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Affiliation(s)
- K N Niladevi
- Biotechnology Division, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, 695019, India
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22
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Electrochemical incineration of indigo textile dye in filter-press-type FM01-LC electrochemical cell using BDD electrodes. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.04.108] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Kim S, Zille A, Murkovic M, Güebitz G, Cavaco-Paulo A. Enzymatic polymerization on the surface of functionalized cellulose fibers. Enzyme Microb Technol 2007. [DOI: 10.1016/j.enzmictec.2007.01.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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