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Grandbois RM, Santschi PH, Xu C, Mitchell JM, Kaplan DI, Yeager CM. Iodide uptake by forest soils is principally related to the activity of extracellular oxidases. Front Chem 2023; 11:1105641. [PMID: 36936531 PMCID: PMC10019592 DOI: 10.3389/fchem.2023.1105641] [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: 11/22/2022] [Accepted: 02/14/2023] [Indexed: 03/06/2023] Open
Abstract
129I is a nuclear fission decay product of concern because of its long half-life (16 Ma) and propensity to bioaccumulate. Microorganisms impact iodine mobility in soil systems by promoting iodination (covalent binding) of soil organic matter through processes that are not fully understood. Here, we examined iodide uptake by soils collected at two depths (0-10 and 10-20 cm) from 5 deciduous and coniferous forests in Japan and the United States. Autoclaved soils, and soils amended with an enzyme inhibitor (sodium azide) or an antibacterial agent (bronopol), bound significantly less 125I tracer (93%, 81%, 61% decrease, respectively) than the untreated control soils, confirming a microbial role in soil iodide uptake. Correlation analyses identified the strongest significant correlation between 125I uptake and three explanatory variables, actinobacteria soil biomass (p = 6.04E-04, 1.35E-02 for Kendall-Tau and regression analysis, respectively), soil nitrogen content (p = 4.86E-04, 4.24E-03), and soil oxidase enzyme activity at pH 7.0 using the substrate L-DOPA (p = 2.83E-03, 4.33E-04) and at pH 5.5 using the ABTS (p = 5.09E-03, 3.14E-03). Together, the results suggest that extracellular oxidases, primarily of bacterial origin, are the primary catalyst for soil iodination in aerobic, surface soils of deciduous and coniferous forests, and that soil N content may be indicative of the availability of binding sites for reactive iodine species.
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Affiliation(s)
- Russell M. Grandbois
- Laboratory for Environmental and Oceanographic Research, Department of Marine Sciences, Texas A&M University—Galveston, Galveston, TX, United States
| | - Peter H. Santschi
- Laboratory for Environmental and Oceanographic Research, Department of Marine Sciences, Texas A&M University—Galveston, Galveston, TX, United States
| | - Chen Xu
- Laboratory for Environmental and Oceanographic Research, Department of Marine Sciences, Texas A&M University—Galveston, Galveston, TX, United States
| | - Joshua M. Mitchell
- Chemical Diagnostics and Engineering, Los Alamos National Laboratory, Los Alamos, NM, United States
| | - Daniel I. Kaplan
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States
| | - Chris M. Yeager
- Chemical Diagnostics and Engineering, Los Alamos National Laboratory, Los Alamos, NM, United States
- *Correspondence: Chris M. Yeager,
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Nihei R, Usami M, Taguchi T, Amachi S. Role of fungal laccase in iodide oxidation in soils. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 189:127-134. [PMID: 29665575 DOI: 10.1016/j.jenvrad.2018.03.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/29/2018] [Accepted: 03/29/2018] [Indexed: 06/08/2023]
Abstract
Previously, we hypothesized that microbial laccase oxidizes iodide (I-) in soils to molecular iodine (I2) or hypoiodous acid (HIO), both of which are easily incorporated into natural soil organic matter, and thus plays a role in iodine sorption on soils. In this study, soil iodide oxidase activity was determined by a colorimetric assay to evaluate if laccase is responsible for iodide oxidation in soils. Three types of Japanese soil showed significant iodide oxidase activities (0.751-2.87 mU g soil-1) at pH 4.0, which decreased with increasing pH, until it was no longer detected at pH 5.5. The activity was inhibited strongly by autoclaving or by the addition of common laccase inhibitors. Similar tendency of inhibition was observed in soil laccase activity, which was determined with 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) as a substrate. Significant positive correlations (R2 values of 0.855-0.896) between iodide oxidase activity and laccase activity were observed in two of three soils. Commercially available fungal laccases showed only very low iodide oxidase activities (4.68-18.0 mU mg-1), but enhanced activities of 102-739 mU mg-1 were observed in the presence of redox mediators. Finally, we successfully isolated fungal strains with iodide-oxidizing phenotype in the presence of redox mediators. Polyacrylamide gel electrophoresis of the culture supernatant of Scytalidium sp. strain UMS and subsequent active stain revealed that the fungal laccase actually oxidized iodide in the presence of redox mediators. These results suggest that at least part of iodide in soils is oxidized by fungal laccase through the laccase-mediator system.
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Affiliation(s)
- Reiko Nihei
- Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo-city, Chiba 271-8510, Japan
| | - Mizuki Usami
- Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo-city, Chiba 271-8510, Japan
| | - Taro Taguchi
- Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo-city, Chiba 271-8510, Japan
| | - Seigo Amachi
- Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo-city, Chiba 271-8510, Japan.
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Botta L, Bizzarri BM, Crucianelli M, Saladino R. Advances in biotechnological synthetic applications of carbon nanostructured systems. J Mater Chem B 2017; 5:6490-6510. [PMID: 32264413 DOI: 10.1039/c7tb00764g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In the last few years carbon nanostructures have been applied for the immobilization of enzymes and biomimetic organo-metallic species useful for biotechnological applications. The nature of the support and the method of immobilization are responsible for the stability, reactivity and selectivity of the system. In this review, we focus on the recent advances in the use of carbon nanostructures, carbon nanotubes, carbon nanorods, fullerene and graphene for the preparation of biocatalytic and biomimetic systems and for their application in the development of green chemical processes.
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Affiliation(s)
- Lorenzo Botta
- Department of Biological and Ecological Sciences (DEB), University of Tuscia, Via S. Camillo de Lellis snc, 01100 Viterbo, Italy.
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Cunha M, Felgueiras H, Gouveia I, Zille A. Synergistically enhanced stability of laccase immobilized on synthesized silver nanoparticles with water-soluble polymers. Colloids Surf B Biointerfaces 2017; 154:210-220. [DOI: 10.1016/j.colsurfb.2017.03.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 03/06/2017] [Accepted: 03/09/2017] [Indexed: 01/22/2023]
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Yeager CM, Amachi S, Grandbois R, Kaplan DI, Xu C, Schwehr KA, Santschi PH. Microbial Transformation of Iodine: From Radioisotopes to Iodine Deficiency. ADVANCES IN APPLIED MICROBIOLOGY 2017; 101:83-136. [PMID: 29050668 DOI: 10.1016/bs.aambs.2017.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Iodine is a biophilic element that is important for human health, both as an essential component of several thyroid hormones and, on the other hand, as a potential carcinogen in the form of radioiodine generated by anthropogenic nuclear activity. Iodine exists in multiple oxidation states (-1, 0, +1, +3, +5, and +7), primarily as molecular iodine (I2), iodide (I-), iodate [Formula: see text] , or organic iodine (org-I). The mobility of iodine in the environment is dependent on its speciation and a series of redox, complexation, sorption, precipitation, and microbial reactions. Over the last 15years, there have been significant advances in iodine biogeochemistry, largely spurred by renewed interest in the fate of radioiodine in the environment. We review the biogeochemistry of iodine, with particular emphasis on the microbial processes responsible for volatilization, accumulation, oxidation, and reduction of iodine, as well as the exciting technological potential of these fascinating microorganisms and enzymes.
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Abstract
Laccases are multi-copper oxidoreductases which catalyze the oxidation of a wide range of substrates during the simultaneous reduction of oxygen to water. These enzymes, originally found in fungi, plants, and other natural sources, have many industrial and biotechnological applications. They are used in the food, textile, pulp, and paper industries, as well as for bioremediation purposes. Although natural hosts can provide relatively high levels of active laccases after production optimization, heterologous expression can bring, moreover, engineered enzymes with desired properties, such as different substrate specificity or improved stability. Hence, diverse hosts suitable for laccase production are reviewed here, while the greatest emphasis is placed on yeasts which are commonly used for industrial production of various proteins. Different approaches to optimize the laccase expression and activity are also discussed in detail here.
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Affiliation(s)
- Zuzana Antošová
- Department of Membrane Transport, Institute of Physiology, Czech Academy of Sciences (CAS), Vídeňská 1083, 142 20, Prague 4, Czech Republic.
| | - Hana Sychrová
- Department of Membrane Transport, Institute of Physiology, Czech Academy of Sciences (CAS), Vídeňská 1083, 142 20, Prague 4, Czech Republic.
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Sampaio LMP, Padrão J, Faria J, Silva JP, Silva CJ, Dourado F, Zille A. Laccase immobilization on bacterial nanocellulose membranes: Antimicrobial, kinetic and stability properties. Carbohydr Polym 2016; 145:1-12. [PMID: 27106145 DOI: 10.1016/j.carbpol.2016.03.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/25/2016] [Accepted: 03/05/2016] [Indexed: 02/05/2023]
Abstract
This work studied the physical immobilization of a commercial laccase on bacterial nanocellulose (BNC) aiming to identify the laccase antibacterial properties suitable for wound dressings. Physico-chemical analysis demonstrates that the BNC structure is manly formed by pure crystalline Iα cellulose. The pH optimum and activation energy of free laccase depends on the substrate employed corresponding to pH 6, 7, 3 and 57, 22, 48kJmol(-1) for 2,6-dimethylphenol (DMP), catechol and 2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), respectively. The Michaelis-Menten constant (Km) value for the immobilized laccase (0.77mM) was found to be almost double of that of the free enzyme (0.42mM). However, the specific activities of immobilized and free laccase are similar suggesting that the cage-like structure of BNC allows entrapped laccase to maintain some flexibility and favour substrate accessibility. The results clearly show the antimicrobial effect of laccase in Gram-positive (92%) and Gram-negative (26%) bacteria and cytotoxicity acceptable for wound dressing applications.
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Affiliation(s)
- Liliana M P Sampaio
- 2C2T-Centre for Textile Science and Technology, Textile Engineering Department, University of Minho, Campus Azurem, 4800-058 Guimarães, Portugal.
| | - Jorge Padrão
- Centre for Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal.
| | - Jorge Faria
- 2C2T-Centre for Textile Science and Technology, Textile Engineering Department, University of Minho, Campus Azurem, 4800-058 Guimarães, Portugal.
| | - João P Silva
- Centre for Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal.
| | - Carla J Silva
- CeNTI-Centro de Nanotecnologia e Materiais Técnicos, Funcionais e Inteligentes, Rua Fernando Mesquita 2785, 4760-034 V. N. Famalicão, Portugal.
| | - Fernando Dourado
- Centre for Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal.
| | - Andrea Zille
- 2C2T-Centre for Textile Science and Technology, Textile Engineering Department, University of Minho, Campus Azurem, 4800-058 Guimarães, Portugal.
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Forootanfar H, Faramarzi MA. Insights into laccase producing organisms, fermentation states, purification strategies, and biotechnological applications. Biotechnol Prog 2015; 31:1443-63. [DOI: 10.1002/btpr.2173] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/30/2015] [Indexed: 12/07/2022]
Affiliation(s)
- Hamid Forootanfar
- Dept. of Pharmaceutical Biotechnology, Faculty of Pharmacy; Kerman University of Medical Sciences; Kerman Iran
| | - Mohammad Ali Faramarzi
- Dept. of Pharmaceutical Biotechnology, Faculty of Pharmacy & Biotechnology Research Center; Tehran University of Medical Sciences; Tehran 1417614411 Iran
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Laccase-Catalyzed Surface Modification of Thermo-Mechanical Pulp (TMP) for the Production of Wood Fiber Insulation Boards Using Industrial Process Water. PLoS One 2015; 10:e0128623. [PMID: 26046652 PMCID: PMC4457874 DOI: 10.1371/journal.pone.0128623] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 04/29/2015] [Indexed: 11/19/2022] Open
Abstract
Low-density wood fiber insulation boards are traditionally manufactured in a wet process using a closed water circuit (process water). The water of these industrial processes contains natural phenolic extractives, aside from small amounts of admixtures (e.g., binders and paraffin). The suitability of two fungal laccases and one bacterial laccase was determined by biochemical characterization considering stability and substrate spectra. In a series of laboratory scale experiments, the selected commercial laccase from Myceliophtora thermophila was used to catalyze the surface modification of thermo-mechanical pulp (TMP) using process water. The laccase catalyzed the covalent binding of the phenolic compounds of the process water onto the wood fiber surface and led to change of the surface chemistry directly via crosslinking of lignin moieties. Although a complete substitution of the binder was not accomplished by laccase, the combined use of laccase and latex significantly improved the mechanical strength properties of wood fiber boards. The enzymatically-treated TMP showed better interactions with the synthetic binder, as shown by FTIR-analysis. Moreover, the enzyme is extensively stable in the process water and the approach requires no fresh water as well as no cost-intensive mediator. By applying a second-order polynomial model in combination with the genetic algorithm (GA), the required amount of laccase and synthetic latex could be optimized enabling the reduction of the binder by 40%.
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Pezzella C, Guarino L, Piscitelli A. How to enjoy laccases. Cell Mol Life Sci 2015; 72:923-40. [PMID: 25577278 PMCID: PMC11113763 DOI: 10.1007/s00018-014-1823-9] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 12/30/2014] [Indexed: 01/08/2023]
Abstract
An analysis of the scientific literature published in the last 10 years reveals a constant growth of laccase applicative research in several industrial fields followed by the publication of a great number of patents. The Green Chemistry journal devoted the cover of its September 2014 issue to a laccase as greener alternative for chemical oxidation. This indicates that laccase "never-ending story" has found a new promising trend within the constant search for efficient (bio)catalysts able to meet the 12 green chemistry principles. A survey of ancient and cutting-edge uses of laccase in different industrial sectors is offered in this review with the aim both to underline their potential and to provide inspiration for new ones. Applications in textile and food fields have been deeply described, as well as examples concerning polymer synthesis and laccase-catalysed grafting. Recent applications in pharmaceutical and cosmetic industry have also been reviewed.
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Affiliation(s)
- Cinzia Pezzella
- Dipartimento di Scienze Chimiche, Complesso Universitario Monte S. Angelo, via Cintia 4, 80126, Naples, Italy,
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Ihssen J, Schubert M, Thöny-Meyer L, Richter M. Laccase catalyzed synthesis of iodinated phenolic compounds with antifungal activity. PLoS One 2014; 9:e89924. [PMID: 24594755 PMCID: PMC3940670 DOI: 10.1371/journal.pone.0089924] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 01/23/2014] [Indexed: 11/21/2022] Open
Abstract
Iodine is a well known antimicrobial compound. Laccase, an oxidoreductase which couples the one electron oxidation of diverse phenolic and non-phenolic substrates to the reduction of oxygen to water, is capable of oxidizing unreactive iodide to reactive iodine. We have shown previously that laccase-iodide treatment of spruce wood results in a wash-out resistant antimicrobial surface. In this study, we investigated whether phenolic compounds such as vanillin, which resembles sub-structures of softwood lignin, can be directly iodinated by reacting with laccase and iodide, resulting in compounds with antifungal activity. HPLC-MS analysis showed that vanillin was converted to iodovanillin by laccase catalysis at an excess of potassium iodide. No conversion of vanillin occurred in the absence of enzyme. The addition of redox mediators in catalytic concentrations increased the rate of iodide oxidation ten-fold and the yield of iodovanillin by 50%. Iodinated phenolic products were also detected when o-vanillin, ethyl vanillin, acetovanillone and methyl vanillate were incubated with laccase and iodide. At an increased educt concentration of 0.1 M an almost one to one molar ratio of iodide to vanillin could be used without compromising conversion rate, and the insoluble iodovanillin product could be recovered by simple centrifugation. The novel enzymatic synthesis procedure fulfills key criteria of green chemistry. Biocatalytically produced iodovanillin and iodo-ethyl vanillin had significant growth inhibitory effects on several wood degrading fungal species. For Trametes versicolor, a species causing white rot of wood, almost complete growth inhibition and a partial biocidal effect was observed on agar plates. Enzymatic tests indicated that the iodinated compounds acted as enzyme responsive, antimicrobial materials.
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Affiliation(s)
- Julian Ihssen
- Laboratory for Biomaterials, Empa, Swiss Federal Laboratories for Materials Science and Technology, St. Gallen, Switzerland
| | - Mark Schubert
- Laboratory for Applied Wood Materials, Empa, Swiss Federal Laboratories for Materials Science and Technology, St. Gallen, Switzerland
| | - Linda Thöny-Meyer
- Laboratory for Biomaterials, Empa, Swiss Federal Laboratories for Materials Science and Technology, St. Gallen, Switzerland
| | - Michael Richter
- Laboratory for Biomaterials, Empa, Swiss Federal Laboratories for Materials Science and Technology, St. Gallen, Switzerland
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Toscano MD, De Maria L, Lobedanz S, Østergaard LH. Optimization of a Small Laccase by Active-Site Redesign. Chembiochem 2013; 14:1209-11. [DOI: 10.1002/cbic.201300256] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Indexed: 11/11/2022]
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13
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Grover N, Dinu CZ, Kane RS, Dordick JS. Enzyme-based formulations for decontamination: current state and perspectives. Appl Microbiol Biotechnol 2013; 97:3293-300. [DOI: 10.1007/s00253-013-4797-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 02/15/2013] [Accepted: 02/18/2013] [Indexed: 11/28/2022]
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Protection of wood from microorganisms by laccase-catalyzed iodination. Appl Environ Microbiol 2012; 78:7267-75. [PMID: 22865075 DOI: 10.1128/aem.01856-12] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In the present work, Norway spruce wood (Picea abies L.) was reacted with a commercial Trametes versicolor laccase in the presence of potassium iodide salt or the phenolic compounds thymol and isoeugenol to impart an antimicrobial property to the wood surface. In order to assess the efficacy of the wood treatment, a leaching of the iodinated and polymerized wood and two biotests including bacteria, a yeast, blue stain fungi, and wood decay fungi were performed. After laccase-catalyzed oxidation of the phenols, the antimicrobial effect was significantly reduced. In contrast, the enzymatic oxidation of iodide (I(-)) to iodine (I(2)) in the presence of wood led to an enhanced resistance of the wood surface against all microorganisms, even after exposure to leaching. The efficiency of the enzymatic wood iodination was comparable to that of a chemical wood preservative, VP 7/260a. The modification of the lignocellulose by the laccase-catalyzed iodination was assessed by the Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR) technique. The intensities of the selected lignin-associated bands and carbohydrate reference bands were analyzed, and the results indicated a structural change in the lignin matrix. The results suggest that the laccase-catalyzed iodination of the wood surface presents an efficient and ecofriendly method for wood protection.
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Grover N, Borkar IV, Dinu CZ, Kane RS, Dordick JS. Laccase- and chloroperoxidase-nanotube paint composites with bactericidal and sporicidal activity. Enzyme Microb Technol 2012; 50:271-9. [DOI: 10.1016/j.enzmictec.2012.01.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2011] [Revised: 01/23/2012] [Accepted: 01/24/2012] [Indexed: 11/26/2022]
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Piscitelli A, Pezzella C, Giardina P, Faraco V, Giovanni S. Heterologous laccase production and its role in industrial applications. Bioeng Bugs 2011; 1:252-62. [PMID: 21327057 DOI: 10.4161/bbug.1.4.11438] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 01/25/2010] [Accepted: 01/27/2010] [Indexed: 02/04/2023] Open
Abstract
Laccases are blue multicopper oxidases, catalyzing the oxidation of an array of aromatic substrates concomitantly with the reduction of molecular oxygen to water. These enzymes are implicated in a variety of biological activities. Most of the laccases studied thus far are of fungal origin. The large range of substrates oxidized by laccases has raised interest in using them within different industrial fields, such as pulp delignification, textile dye bleaching, and bioremediation. Laccases secreted from native sources are usually not suitable for large-scale purposes, mainly due to low production yields and high cost of preparation/purification procedures. Heterologous expression may provide higher enzyme yields and may permit to produce laccases with desired properties (such as different substrate specificities, or improved stabilities) for industrial applications. This review surveys researches on heterologous laccase expression focusing on the pivotal role played by recombinant systems towards the development of robust tools for greening modern industry.
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Affiliation(s)
- Alessandra Piscitelli
- Dipartimento di Chimica Organica e Biochimica, Complesso Universitario Monte S. Angelo, Napoli, Italy.
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