151
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Strategies for dephenolization of raw olive mill wastewater by means of Pleurotus ostreatus. J Ind Microbiol Biotechnol 2011; 39:719-29. [PMID: 22179541 DOI: 10.1007/s10295-011-1072-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Accepted: 11/30/2011] [Indexed: 10/14/2022]
Abstract
The reduction of polyphenols content in olive mill wastewater (OMW) is a major issue in olive oil manufacturing. Although researchers have pointed out the potential of white-rot fungus in dephenolizing OMW, the results available in the literature mainly concern pretreated (sterilized) OMW. This paper deals with the reduction of polyphenols content in untreated OMW by means of a white-rot fungus, Pleurotus ostreatus. Dephenolization was performed both in an airlift bioreactor and in aerated flasks. The process was carried out under controlled non-sterile conditions, with different operating configurations (batch, continuous, biomass recycling) representative of potential industrial operations. Total organic carbon, polyphenols concentration, phenol oxidase activity, dissolved oxygen concentration, oxygen consumption rate, and pH were measured during every run. Tests were carried out with or without added nutrients (potato starch and potato dextrose) and laccases inducers (i.e., CuSO₄). OMW endogenous microorganisms were competing with P. ostreatus for oxygen during simultaneous fermentation. Dephenolization of raw OMW by P. ostreatus under single batch was as large as 70%. Dephenolization was still extensive even when biomass was recycled up to six times. OMW pre-aeration had to be provided under continuous operation to avoid oxygen consumption by endogenous microorganisms that might spoil the process. The role of laccases in the dephenolization process has been discussed. Dephenolization under batch conditions with biomass recycling and added nutrients proved to be the most effective configuration for OMW polyphenols reduction in industrial plants (42-68% for five cycles).
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152
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Chiaiese P, Palomba F, Tatino F, Lanzillo C, Pinto G, Pollio A, Filippone E. Engineered tobacco and microalgae secreting the fungal laccase POXA1b reduce phenol content in olive oil mill wastewater. Enzyme Microb Technol 2011; 49:540-6. [PMID: 22142729 DOI: 10.1016/j.enzmictec.2011.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 05/31/2011] [Accepted: 06/03/2011] [Indexed: 10/18/2022]
Abstract
Olive oil mill wastewaters (OMWs) are characterised by low pH and a high content of mono- and polyaromatic compounds that exert microbial and phytotoxic activity. The laccase cDNA of the poxA1b gene from Pleurotus ostreatus, carrying a signal peptide sequence for enzyme secretion and driven by the CaMV 35S promoter, was cloned into a plant expression vector. Nuclear genetic transformation was carried out by co-cultivation of Agrobacterium tumefaciens with tobacco cv Samsun NN leaves and cells of five different microalgae accessions belonging to the genera Chlamydomonas, Chlorella and Ankistrodesmus. Transgenic plants and microalgae were able to express and secrete the recombinant laccase in the root exudates and the culture medium, respectively. In comparison to untransformed controls, the ability to reduce phenol content in OMW solution was enhanced up to 2.8-fold in transgenic tobacco lines and by up to about 40% in two microalgae accessions. The present work provides new evidence for metabolic improvement of green organisms through the transgenic approach to remediation.
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Affiliation(s)
- Pasquale Chiaiese
- Department of Soil, Plant, Environmental and Animal Production Sciences, School of Biotechnological Sciences, University of Naples Federico II, Portici, Italy.
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153
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Yang Y, Ma F, Yu H, Fan F, Wan X, Zhang X, Jiang M. Characterization of a laccase gene from the white-rot fungi Trametes sp. 5930 isolated from Shennongjia Nature Reserve in China and studying on the capability of decolorization of different synthetic dyes. Biochem Eng J 2011. [DOI: 10.1016/j.bej.2011.07.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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154
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Zhuo R, Ma L, Fan F, Gong Y, Wan X, Jiang M, Zhang X, Yang Y. Decolorization of different dyes by a newly isolated white-rot fungi strain Ganoderma sp.En3 and cloning and functional analysis of its laccase gene. JOURNAL OF HAZARDOUS MATERIALS 2011; 192:855-73. [PMID: 21733624 DOI: 10.1016/j.jhazmat.2011.05.106] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 05/31/2011] [Accepted: 05/31/2011] [Indexed: 05/16/2023]
Abstract
A laccase-producing white-rot fungi strain Ganoderma sp.En3 was newly isolated from the forest of Tzu-chin Mountain in China. Ganoderma sp.En3 had a strong ability of decolorizing four synthetic dyes, two simulated dye bath effluents and the real textile dye effluent. Induction in the activity of laccase during the decolorization process indicated that laccase played an important role in the efficient decolorization of different dyes by this fungus. Phytotoxicity study with respect to Triticum aestivum and Oryza sativa demonstrated that Ganoderma sp.En3 was able to detoxify four synthetic dyes, two simulated dye effluents and the real textile dye effluent. The laccase gene lac-En3-1 and its corresponding full-length cDNA were then cloned and characterized from Ganoderma sp.En3. The deduced protein sequence of LAC-En3-1 contained four copper-binding conserved domains of typical laccase protein. The functionality of lac-En3-1 gene encoding active laccase was verified by expressing this gene in the yeast Pichia pastoris successfully. The recombinant laccase produced by the yeast transformant could decolorize the synthetic dyes, simulated dye effluents and the real textile dye effluent. The ability of decolorizing different dyes was positively related to the laccase activity. In addition, the 5'-flanking sequence upstream of the start codon ATG in lac-En3-1 gene was obtained. Many putative cis-acting responsive elements were predicted in the promoter region of lac-En3-1.
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Affiliation(s)
- Rui Zhuo
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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155
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Böhmer U, Frömmel S, Bley T, Müller M, Frankenfeld K, Miethe P. Solid-state fermentation of lignocellulotic materials for the production of enzymes by the white-rot fungus Trametes hirsuta in a modular bioreactor. Eng Life Sci 2011. [DOI: 10.1002/elsc.201000162] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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156
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Shraddha, Shekher R, Sehgal S, Kamthania M, Kumar A. Laccase: microbial sources, production, purification, and potential biotechnological applications. Enzyme Res 2011; 2011:217861. [PMID: 21755038 PMCID: PMC3132468 DOI: 10.4061/2011/217861] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 03/30/2011] [Accepted: 04/16/2011] [Indexed: 11/21/2022] Open
Abstract
Laccase belongs to the blue multicopper oxidases and participates in cross-linking of monomers, degradation of polymers, and ring cleavage of aromatic compounds. It is widely distributed in higher plants and fungi. It is present in Ascomycetes, Deuteromycetes and Basidiomycetes and abundant in lignin-degrading white-rot fungi. It is also used in the synthesis of organic substance, where typical substrates are amines and phenols, the reaction products are dimers and oligomers derived from the coupling of reactive radical intermediates. In the recent years, these enzymes have gained application in the field of textile, pulp and paper, and food industry. Recently, it is also used in the design of biosensors, biofuel cells, as a medical diagnostics tool and bioremediation agent to clean up herbicides, pesticides and certain explosives in soil. Laccases have received attention of researchers in the last few decades due to their ability to oxidize both phenolic and nonphenolic lignin-related compounds as well as highly recalcitrant environmental pollutants. It has been identified as the principal enzyme associated with cuticular hardening in insects. Two main forms have been found: laccase-1 and laccase-2. This paper reviews the occurrence, mode of action, general properties, production, applications, and immobilization of laccases within different industrial fields.
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Affiliation(s)
- Shraddha
- Department of Biotechnology, Institute of Biomedical Education & Research, Mangalayatan University, Aligarh 202001, India
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157
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Neifar M, Kamoun A, Jaouani A, Ellouze-Ghorbel R, Ellouze-Chaabouni S. Application of Asymetrical and Hoke Designs for Optimization of Laccase Production by the White-Rot Fungus Fomes fomentarius in Solid-State Fermentation. Enzyme Res 2011; 2011:368525. [PMID: 23008760 PMCID: PMC3112507 DOI: 10.4061/2011/368525] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 03/25/2011] [Accepted: 03/30/2011] [Indexed: 11/20/2022] Open
Abstract
Statistical approaches were employed for the optimization of different cultural parameters for the production of laccase by the white rot fungus Fomes fomentarius MUCL 35117 in wheat bran-based solid medium. first, screening of production parameters was performed using an asymmetrical design 2(5)3(3)//16, and the variables with statistically significant effects on laccase production were identified. Second, inoculum size, CaCl(2) concentration, CuSO(4) concentration, and incubation time were selected for further optimization studies using a Hoke design. The application of the response surface methodology allows us to determine a set of optimal conditions (CaCl(2), 5.5 mg/gs, CuSO(4), 2.5 mg/gs, inoculum size, 3 fungal discs (6 mm Ø), and 13 days of static cultivation). Experiments carried out under these conditions led to a laccase production yield of 150 U/g dry substrate.
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Affiliation(s)
- Mohamed Neifar
- Unité Enzymes et Bioconversion, Ecole Nationale d'Ingénieurs de Sfax, route de Soukra 3038 Sfax, Tunisia
| | - Amel Kamoun
- Laboratoire de Chimie Industrielle, Ecole Nationale d'Ingénieurs de Sfax, route de Soukra 3038 Sfax, Tunisia
| | - Atef Jaouani
- Laboratoire Microorganismes et Biomolécules Actives, Faculté des Sciences de Tunis, Campus Universitaire, 2092 Tunis, Tunisia
| | - Raoudha Ellouze-Ghorbel
- Unité Enzymes et Bioconversion, Ecole Nationale d'Ingénieurs de Sfax, route de Soukra 3038 Sfax, Tunisia
| | - Semia Ellouze-Chaabouni
- Unité Enzymes et Bioconversion, Ecole Nationale d'Ingénieurs de Sfax, route de Soukra 3038 Sfax, Tunisia
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158
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Piscitelli A, Giardina P, Lettera V, Pezzella C, Sannia G, Faraco V. Induction and transcriptional regulation of laccases in fungi. Curr Genomics 2011; 12:104-12. [PMID: 21966248 PMCID: PMC3129044 DOI: 10.2174/138920211795564331] [Citation(s) in RCA: 181] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 03/01/2011] [Accepted: 03/14/2011] [Indexed: 11/22/2022] Open
Abstract
Fungal laccases are phenol oxidases widely studied for their use in several industrial applications, including pulp bleaching in paper industry, dye decolourisation, detoxification of environmental pollutants and revalorization of wastes and wastewaters. The main difficulty in using these enzymes at industrial scale ensues from their production costs. Elucidation of the components and the mechanisms involved in regulation of laccase gene expression is crucial for increasing the productivity of native laccases in fungi. Laccase gene transcription is regulated by metal ions, various aromatic compounds related to lignin or lignin derivatives, nitrogen and carbon sources. In this manuscript, most of the published results on fungal laccase induction, as well as analyses of both the sequences and putative functions of laccase gene promoters are reviewed. Analyses of promoter sequences allow defining a correlation between the observed regulatory effects on laccase gene transcription and the presence of specific responsive elements, and postulating, in some cases, a mechanism for their functioning. Only few reports have investigated the molecular mechanisms underlying laccase regulation by different stimuli. The reported analyses suggest the existence of a complex picture of laccase regulation phenomena acting through a variety of cis acting elements. However, the general mechanisms for laccase transcriptional regulation are far from being unravelled yet.
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Affiliation(s)
| | | | | | | | | | - Vincenza Faraco
- University of Naples “Federico II”, Dipartimento di Chimica Organica e Biochimica, Complesso Universitario Monte S. Angelo, via Cintia 4, 80126 Napoli, Italy
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159
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Kües U, Rühl M. Multiple multi-copper oxidase gene families in basidiomycetes - what for? Curr Genomics 2011; 12:72-94. [PMID: 21966246 PMCID: PMC3129051 DOI: 10.2174/138920211795564377] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 03/11/2011] [Accepted: 03/14/2011] [Indexed: 11/22/2022] Open
Abstract
Genome analyses revealed in various basidiomycetes the existence of multiple genes for blue multi-copper oxidases (MCOs). Whole genomes are now available from saprotrophs, white rot and brown rot species, plant and animal pathogens and ectomycorrhizal species. Total numbers (from 1 to 17) and types of mco genes differ between analyzed species with no easy to recognize connection of gene distribution to fungal life styles. Types of mco genes might be present in one and absent in another fungus. Distinct types of genes have been multiplied at speciation in different organisms. Phylogenetic analysis defined different subfamilies of laccases sensu stricto (specific to Agaricomycetes), classical Fe2+-oxidizing Fet3-like ferroxidases, potential ferroxidases/laccases exhibiting either one or both of these enzymatic functions, enzymes clustering with pigment MCOs and putative ascorbate oxidases. Biochemically best described are laccases sensu stricto due to their proposed roles in degradation of wood, straw and plant litter and due to the large interest in these enzymes in biotechnology. However, biological functions of laccases and other MCOs are generally little addressed. Functions in substrate degradation, symbiontic and pathogenic intercations, development, pigmentation and copper homeostasis have been put forward. Evidences for biological functions are in most instances rather circumstantial by correlations of expression. Multiple factors impede research on biological functions such as difficulties of defining suitable biological systems for molecular research, the broad and overlapping substrate spectrum multi-copper oxidases usually possess, the low existent knowledge on their natural substrates, difficulties imposed by low expression or expression of multiple enzymes, and difficulties in expressing enzymes heterologously.
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Affiliation(s)
- Ursula Kües
- University of Goettingen, Büsgen-Institute, Division of Molecular Wood Biotechnology and Technical Mycology, Büsgenweg 2, 37077 Goettingen, Germany
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160
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Sivan A. New perspectives in plastic biodegradation. Curr Opin Biotechnol 2011; 22:422-6. [PMID: 21356588 DOI: 10.1016/j.copbio.2011.01.013] [Citation(s) in RCA: 213] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 01/30/2011] [Accepted: 01/31/2011] [Indexed: 11/18/2022]
Abstract
During the past 50 years new plastic materials, in various applications, have gradually replaced the traditional metal, wood, leather materials. Ironically, the most preferred property of plastics--durability--exerts also the major environmental threat. Recycling has practically failed to provide a safe solution for disposal of plastic waste (only 5% out of 1 trillion plastic bags, annually produced in the US alone, are being recycled). Since the most utilized plastic is polyethylene (PE; ca. 140 million tons/year), any reduction in the accumulation of PE waste alone would have a major impact on the overall reduction of the plastic waste in the environment. Since PE is considered to be practically inert, efforts were made to isolate unique microorganisms capable of utilizing synthetic polymers. Recent data showed that biodegradation of plastic waste with selected microbial strains became a viable solution.
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Affiliation(s)
- Alex Sivan
- Department of Biotechnology Engineering, Ben Gurion University of the Negev, P.O. Box 653, Beer Sheva, Israel.
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161
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Gayosso-Canales M, Esparza-García FJ, Bermúdez-Cruz RM, Tomasini A, Ruiz-Aguilar GML, Rodríguez-Vázquez R. Application of 2III7-3 fractional factorial experimental design to enhance enzymatic activities of Pleurotus ostreatus with high concentrations of polychlorinated biphenyls. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2011; 46:298-305. [PMID: 21308601 DOI: 10.1080/10934529.2011.539095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A 2(III)(7-3) fractional factorial experimental design was used to establish 16 culture media, with and without PCBs to enhance the activities of laccase (Lac), manganese peroxidase (MnP), and versatile peroxidase (VP) produced by the white rot fungus Pleurotus ostreatus. The culture was added to 10,000 mg L(-1) of transformer oil, containing 71% of the identified Arochlor 1242. The culture conditions were established with eight variables at two values (levels); pH (4 and 6), agitation (100 and 200 rpm), CuSO(4) (150 and 250 mg L(-1)), MnSO(4) (50 and 200 mg L(-1)), Tween 80 (13 and 3500 mg L(-1)), wheat straw (0 and 2.5 g L(-1)), sugarcane bagasse (0 and 2.5 g L(-1)),and Arochlor 1242 (0 and 7100 mg L(-1)) at 4, 8, 12, 16 and 20 days old culture. Laccase activity was enhanced at a high value of pH and low value of agitation (P<0.001) and correlated positively (R(2)= 0.9; α=0.05) with the removal of polychlorinated biphenyls (PCBs). VP activity was enhanced 27-fold with PCBs, Tween 80 and pH. The MnP activity was increased 1.2-fold with PCBs. The fractional factorial experimental design methodology allowed us to determine the P. ostreatus culture media conditions to enhance Lac and VP activities for efficient removal of Arochlor 1242 (one of the most recalcitrant organochloride pollutants). The factors that shown the greatest effect on Lac activity were: pH, agitation and high concentrations of Arochlor 1242.
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162
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Isolation, identification, and biochemical characterization of a brown rot fungus capable of textile dye decolorization. World J Microbiol Biotechnol 2010. [DOI: 10.1007/s11274-010-0618-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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163
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An uncertain role for Cu(II) in stimulating Mn(II) oxidation by Leptothrix discophora SS-1. Arch Microbiol 2010; 193:89-93. [DOI: 10.1007/s00203-010-0645-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 10/06/2010] [Accepted: 10/18/2010] [Indexed: 10/18/2022]
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164
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Differential regulation of laccase gene expression in Coriolopsis rigida LPSC No. 232. Fungal Biol 2010; 114:999-1006. [PMID: 21036344 DOI: 10.1016/j.funbio.2010.09.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 09/10/2010] [Accepted: 09/16/2010] [Indexed: 11/23/2022]
Abstract
Two laccase isoenzyme genes (lcc2 and lcc3) from the white-rot fungus Coriolopsis rigida were cloned, and together with the previously described lcc1, their transcript levels were analysed by Quantitative RT-PCR in order to study their expression patterns under a range of putative inducers (Cu(2+), Mn(2+), Fe(3+), 2,6-dimethoxy-1,4-benzoquinone, H(2)O(2,) caffeine, amphotericin B and syringic acid). The highest induction was observed for lcc1 in presence of copper, and thus, a kinetic study was performed to analyze its effect on temporary lcc1 gene expression. Our results showed that upregulation due to copper was linked to growth stage, being highest during the trophophase and decreasing during the idiophase. Amphotericin B increased levels of transcripts of lcc1 and lcc2, syringic acid upregulated lcc1 and lcc3 and 2,6-dimethoxy-1,4-benzoquinone induced lcc2 and lcc3. Possible reasons for why laccase genes from C. rigida are differentially regulated at the transcriptional level are discussed.
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165
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Lettera V, Piscitelli A, Leo G, Birolo L, Pezzella C, Sannia G. Identification of a new member of Pleurotus ostreatus laccase family from mature fruiting body. Fungal Biol 2010; 114:724-30. [DOI: 10.1016/j.funbio.2010.06.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 06/03/2010] [Accepted: 06/04/2010] [Indexed: 10/19/2022]
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166
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Periasamy R, Palvannan T. Optimization of laccase production by Pleurotus ostreatus IMI 395545 using the Taguchi DOE methodology. J Basic Microbiol 2010; 50:548-56. [DOI: 10.1002/jobm.201000095] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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167
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Tinoco R, Acevedo A, Galindo E, Serrano-Carreón L. Increasing Pleurotus ostreatus laccase production by culture medium optimization and copper/lignin synergistic induction. J Ind Microbiol Biotechnol 2010; 38:531-40. [DOI: 10.1007/s10295-010-0797-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Accepted: 07/22/2010] [Indexed: 11/29/2022]
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168
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González Arzola K, Gimeno Y, Arévalo M, Falcón M, Hernández Creus A. Electrochemical and AFM characterization on gold and carbon electrodes of a high redox potential laccase from Fusarium proliferatum. Bioelectrochemistry 2010; 79:17-24. [DOI: 10.1016/j.bioelechem.2009.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Accepted: 10/01/2009] [Indexed: 10/20/2022]
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169
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First description of a laccase-like enzyme in soil algae. Arch Microbiol 2010; 192:759-68. [DOI: 10.1007/s00203-010-0603-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2009] [Revised: 05/21/2010] [Accepted: 06/27/2010] [Indexed: 10/19/2022]
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170
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Role of copper in poly R-478 decolorization by the marine cyanobacterium Phormidium valderianum BDU140441. World J Microbiol Biotechnol 2010. [DOI: 10.1007/s11274-010-0505-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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171
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Differential gene expression of ligninolytic enzymes in Pleurotus ostreatus grown on olive oil mill wastewater. Appl Microbiol Biotechnol 2010; 88:541-51. [DOI: 10.1007/s00253-010-2750-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Revised: 06/17/2010] [Accepted: 06/20/2010] [Indexed: 10/19/2022]
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172
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Iandolo D, Piscitelli A, Sannia G, Faraco V. Enzyme production by solid substrate fermentation of Pleurotus ostreatus and Trametes versicolor on tomato pomace. Appl Biochem Biotechnol 2010; 163:40-51. [PMID: 20582639 DOI: 10.1007/s12010-010-9014-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 06/11/2010] [Indexed: 11/26/2022]
Abstract
A process of solid state fermentation (SSF) on tomato pomace was developed with the white-rot fungi Pleurotus ostreatus and Trametes versicolor, using sorghum stalks as support. Operative parameters (humidity, water activity, and size of substrate particles) guaranteeing a good colonization of tomato pomace by both fungi were defined and conditions for production at high titers of the industrially relevant enzymes laccase, xylanase and protease were identified. Significant laccase activity levels (up to 36 U g(-1) dry matter) were achieved without any optimization of culture conditions, neither by nutrient addition nor by O(2) enrichment. Furthermore, protease activity levels up to 34,000 U g(-1) dry matter were achieved, being higher than those reported for the fungi typically considered as the best protease producers such as Aspergillus strains. Moreover, as one of the most significant results of this study, analysis of P. ostreatus tomato SSF samples by zymogram revealed two bands with laccase activity which had not been detected so far.
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Affiliation(s)
- Donata Iandolo
- Department of Organic Chemistry and Biochemistry, University of Naples Federico II, Complesso Universitario Monte S. Angelo, via Cintia 4, Naples, Italy
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173
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Shah V, Dobiásová P, Baldrian P, Nerud F, Kumar A, Seal S. Influence of iron and copper nanoparticle powder on the production of lignocellulose degrading enzymes in the fungus Trametes versicolor. JOURNAL OF HAZARDOUS MATERIALS 2010; 178:1141-5. [PMID: 20185234 DOI: 10.1016/j.jhazmat.2010.01.141] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2009] [Revised: 01/27/2010] [Accepted: 01/28/2010] [Indexed: 05/20/2023]
Abstract
White rot fungi are one of the key group of microorganisms that help to enrich the soil via degradation of wood. In the current communication, influence of iron and copper nanoparticles on the production of lignocellulolytic enzymes by Trametes versicolor have been investigated. The production of enzymes in the presence of the two nanoparticles was compared to that of ferrous and cupric ions respectively. Results show that both the tested nanoparticles alter the production profile of the lignocellulolytic enzymes when compared to the control set. The production of laccase was not influenced by iron nanoparticles but was effected by copper nanoparticles within 24h of incubation. Both the nanoparticles decreased the production of beta-glucosidase, beta-xylosidase and cellobiohydrolase significantly. However, the production profile of Mn-peroxidase and remained statistically similar to that of control when the organism was incubated with iron and copper nanoparticles. The production profiles were also different when one compares the ionic form of metals and the nanoparticles, suggesting different mechanism of action of the particles on the organism. The difference in the production profile was not growth related as no significant difference was recorded for either form of iron and copper on the growth of T. versicolor.
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Affiliation(s)
- Vishal Shah
- Department of Biology, Dowling College, 150 Idle Hour Blvd., Oakdale, NY 11769, USA.
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174
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Fonseca MI, Shimizu E, Zapata PD, Villalba LL. Copper inducing effect on laccase production of white rot fungi native from Misiones (Argentina). Enzyme Microb Technol 2010; 46:534-9. [DOI: 10.1016/j.enzmictec.2009.12.017] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 12/23/2009] [Indexed: 10/20/2022]
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175
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Flores C, Casasanero R, Trejo‐Hernández M, Galindo E, Serrano‐Carreón L. Production of laccases by
Pleurotus ostreatus
in submerged fermentation in co‐culture with
Trichoderma viride. J Appl Microbiol 2010; 108:810-817. [DOI: 10.1111/j.1365-2672.2009.04493.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- C. Flores
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - R. Casasanero
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - M.R. Trejo‐Hernández
- Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - E. Galindo
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - L. Serrano‐Carreón
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
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176
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Giardina P, Faraco V, Pezzella C, Piscitelli A, Vanhulle S, Sannia G. Laccases: a never-ending story. Cell Mol Life Sci 2010; 67:369-85. [PMID: 19844659 PMCID: PMC11115910 DOI: 10.1007/s00018-009-0169-1] [Citation(s) in RCA: 596] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Revised: 09/07/2009] [Accepted: 10/01/2009] [Indexed: 10/20/2022]
Abstract
Laccases (benzenediol:oxygen oxidoreductases, EC 1.10.3.2) are blue multicopper oxidases that catalyze the oxidation of an array of aromatic substrates concomitantly with the reduction of molecular oxygen to water. In fungi, laccases carry out a variety of physiological roles during their life cycle. These enzymes are being increasingly evaluated for a variety of biotechnological applications due to their broad substrate range. In this review, the most recent studies on laccase structural features and catalytic mechanisms along with analyses of their expression are reported and examined with the aim of contributing to the discussion on their structure-function relationships. Attention has also been paid to the properties of enzymes endowed with unique characteristics and to fungal laccase multigene families and their organization.
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Affiliation(s)
- Paola Giardina
- Dipartimento di Chimica Organica e Biochimica, Complesso Universitario Monte S. Angelo, 80126 Naples, Italy.
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177
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Abstract
AbstractPolycyclic aromatic hydrocarbons (PAHs), their derivatives, and their degradation products were assayed for the ability to enhance activities of ligninolytic enzymes (laccase and versatile peroxidase) of the fungus Pleurotus ostreatus D1. The activities of both laccase and versatile peroxidase were induced by the PAHs, their derivatives, and their degradation products. Laccase was produced mostly in the first 7–10 days, whereas the production of versatile peroxidase began after 5–7 days of cultivation. Non-denaturing PAGE showed the presence of additional forms of laccase and versatile peroxidase in the presence of the xenobiotics in the cultivation medium. The difference in the production time for these enzymes may reflect that laccases are involved in the first stages of PAHs degradation and that versatile peroxidase can be necessary for oxidation of some degradation products. This is the first report on versatile peroxidase induction by PAHs and their derivatives.
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178
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Lu X, Ding S. Effect of Cu2+, Mn2+ and aromatic compounds on the production of laccase isoforms by Coprinus comatus. MYCOSCIENCE 2010. [DOI: 10.1007/s10267-009-0002-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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179
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Copper-Containing Oxidases: Occurrence in Soil Microorganisms, Properties, and Applications. SOIL BIOLOGY 2010. [DOI: 10.1007/978-3-642-02436-8_13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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180
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Telke AA, Kalyani DC, Jadhav UU, Parshetti GK, Govindwar SP. Purification and characterization of an extracellular laccase from a Pseudomonas sp. LBC1 and its application for the removal of bisphenol A. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2009.08.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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181
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Effects and interactions of medium components on laccase from a marine-derived fungus using response surface methodology. Mar Drugs 2009; 7:672-88. [PMID: 20098606 PMCID: PMC2810131 DOI: 10.3390/md7040672] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2009] [Revised: 10/30/2009] [Accepted: 11/02/2009] [Indexed: 11/24/2022] Open
Abstract
The effects of various synthetic medium components and their interactions with each other ultimately impact laccase production in fungi. This was studied using a laccase-hyper-producing marine-derived basidiomycete, Cerrena unicolor MTCC 5159. Inducible laccases were produced in the idiophase only after addition of an inducer such as CuSO4. Concentration of carbon and nitrogen acted antagonistically with respect to laccase production. A combination of low nitrogen and high carbon concentration favored both biomass and laccase production. The most favorable combination resulted in 917 U L−1 of laccase. After sufficient growth had occurred, addition of a surfactant such as Tween 80 positively impacted biomass and increased the laccase activity to around 1,300 U L−1. Increasing the surface to volume ratio of the culture vessel further increased its activity to almost 2,000 U L−1.
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182
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Improvement of laccase production and its properties by low-energy ion implantation. Bioprocess Biosyst Eng 2009; 33:639-46. [PMID: 19882175 DOI: 10.1007/s00449-009-0389-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Accepted: 10/11/2009] [Indexed: 10/20/2022]
Abstract
Low-energy ion implantation was employed to breed laccase producing strain Paecilomyces sp. WSH-L07 and a mutant S152 that exhibited an activity of more than three times over the wild strain was obtained. The optimum substrate of both the wild and mutant laccases was 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate), and followed by guaiacol with optimal pH at 3.4 and 5.0, respectively, while the mutant laccase exhibited a broader active pH range. The mutant laccase had a higher optimal catalytic temperature (60-65 degrees C) than the wild one (55 degrees C), and the wild laccase deactivated rapidly when temperature increased above 55 degrees C. Furthermore, the mutant laccase was more stable under neutral and alkaline conditions. A thermostability experiment revealed that the mutant laccase was superior to the wild laccase. Both laccases were stable in the presence of metal ions, mildly inhibited by SDS (0.5 mM), EDTA (1 mM) and 1,4-dithiothreitol (0.5 mM), and almost completely inhibited by 0.1 mM NaN(3).
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183
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Nakagawa Y, Kikuchi S, Sakamoto Y, Yano A. Identification and characterization of CcCTR1, a copper uptake transporter-like gene, in Coprinopsis cinerea. Microbiol Res 2009; 165:276-87. [PMID: 19716688 DOI: 10.1016/j.micres.2009.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 05/12/2009] [Accepted: 05/21/2009] [Indexed: 11/16/2022]
Abstract
Copper (Cu) is an essential element for the physiological function of organisms. In basidiomycetes, Cu is necessary for the production of phenol oxidase enzymes such as laccase and tyrosinase. We isolated and characterized two genes, CcCTR1 and -2, from the model basidiomycete Coprinopsis cinerea. CcCTR1 and -2 showed similarity to the Cu transporter CTR1 in Saccharomyces cerevisiae. Both CcCTRs had a MLxxM motif that is conserved in other CTR homologs. The addition of Cu to a liquid culture of C. cinerea decreased the mRNA accumulation of CcCTR1 and -2. Heterologous expression of CcCTR1 in S. cerevisiae increased Cu sensitivity, suggesting that CcCTR1 is a Cu uptake transporter. Together, these results suggest that CcCTR1 plays an important role in Cu accumulation in C. cinerea.
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Affiliation(s)
- Yuko Nakagawa
- Iwate Biotechnology Research Center, 22-174-4 Narita, Kitakami-shi, Iwate 024-0003, Japan.
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184
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Neifar M, Jaouani A, Ellouze-Ghorbel R, Ellouze-Chaabouni S, Penninckx MJ. Effect of culturing processes and copper addition on laccase production by the white-rot fungusFomes fomentariusMUCL 35117. Lett Appl Microbiol 2009; 49:73-8. [DOI: 10.1111/j.1472-765x.2009.02621.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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185
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Moussa TAA. Molecular characterization of the phenol oxidase (pox2) gene from the ligninolytic fungus Pleurotus ostreatus. FEMS Microbiol Lett 2009; 298:131-42. [PMID: 19622072 DOI: 10.1111/j.1574-6968.2009.01708.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The gene (pox2) encoding a phenol oxidase from Pleurotus ostreatus, a lignin-degrading basidiomycete, was sequenced and the corresponding pox2-cDNA was also synthesized, cloned and sequenced. The isolated gene consisted of 2674 bp, with the coding sequence interrupted by 19 introns and flanked by an upstream region in which the putative metal-responsive elements (MREs) were determined in the promoter region (849 bp), where MRE 1, 2, 3 and 4 were located in positions -20, -60, -236 and -297. A functional TATA consensus sequence was recognized in position -85, while CAAT and its inversion consensus sequences were recognized in positions -284, -554, -689 and -752. The putative GC box consensus sequences were recognized in positions -181 and -460, and xenobiotic-responsive elements in positions -107, -277 and -390. The isolation of a second cDNA (pox2-cDNA), the nucleotide sequence of pox2, was found to contain an ORF of 1665 bp capable of coding for a protein of 533 amino acid residues. Northern blot analysis revealed that strong transcriptional induction was observed in the copper-supplemented cultures for the pox2 gene.
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Affiliation(s)
- Tarek A A Moussa
- Department of Botany, Faculty of Science, Cairo University, Giza, Egypt.
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186
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Ligninolytic Fungal Laccases and Their Biotechnological Applications. Appl Biochem Biotechnol 2009; 160:1760-88. [DOI: 10.1007/s12010-009-8676-y] [Citation(s) in RCA: 192] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Accepted: 05/18/2009] [Indexed: 10/20/2022]
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187
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Molecular characterization and enzymatic activity of laccases in two Pleurotus spp. with different pathogenic behaviour. ACTA ACUST UNITED AC 2009; 113:381-7. [DOI: 10.1016/j.mycres.2008.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2008] [Revised: 11/11/2008] [Accepted: 11/26/2008] [Indexed: 11/23/2022]
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188
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Stajic´ M, Vukojevic´ J, Duletic´-Lauševic´ S. Biology ofPleurotus eryngiiand role in biotechnological processes: a review. Crit Rev Biotechnol 2009; 29:55-66. [DOI: 10.1080/07388550802688821] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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189
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Mazumder S, Basu SK, Mukherjee M. Laccase production in solid-state and submerged fermentation byPleurotus ostreatus. Eng Life Sci 2009. [DOI: 10.1002/elsc.200700039] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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190
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Georgieva N. Ligninolytic Enzymes Produced by Phanerohaete Chrysosporium 1038and Biotransformation of Lignin. BIOTECHNOL BIOTEC EQ 2009. [DOI: 10.1080/13102818.2009.10818554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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191
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192
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Flores C, Vidal C, Trejo-Hernández MR, Galindo E, Serrano-Carreón L. Selection of Trichoderma strains capable of increasing laccase production by Pleurotus ostreatus and Agaricus bisporus in dual cultures. J Appl Microbiol 2008; 106:249-57. [PMID: 19120619 DOI: 10.1111/j.1365-2672.2008.03998.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To select Trichoderma strains for enhanced laccase production in Pleurotus ostreatus or Agaricus bisporus cultures. METHODS AND RESULTS Laccase production by P. ostreatus and A. bisporus was evaluated in liquid (axenic) and solid (dual cultures) malt extract medium. Oxidation of ABTS, DMP and syringaldazine was evaluated in order to assess the potential of Trichoderma strains to enhance laccase production by basidiomycetes. Selected Pleurotus-Trichoderma interactions yielded higher increases in laccase volumetric activity and an additional laccase isoform was produced. By contrast, Agaricus-Trichoderma interactions lead to smaller increases on laccase volumetric activity, probably as result of repression (or degradation) towards one of the laccases isoforms. CONCLUSIONS The strains of P. ostreatus and A. bisporus assessed in this work showed good potential as laccase producers. The Trichoderma-mediated biological stimulation of laccase production by P. ostreatus and A. bisporus is relevant in order to develop highly productive processes. SIGNIFICANCE AND IMPACT OF THE STUDY Extracellular laccases from basidiomycetes are produced only in small amounts. It is therefore important to increase process productivity for potential industrial applications. The results from this study enable the selection Trichoderma strains capable of increasing laccase production by P. ostreatus or A. bisporus in dual cultures.
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Affiliation(s)
- C Flores
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Morelos, México
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193
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Kudryavtseva OA, Dunaevsky YE, Kamzolkina OV, Belozersky MA. Fungal proteolytic enzymes: Features of the extracellular proteases of xylotrophic basidiomycetes. Microbiology (Reading) 2008. [DOI: 10.1134/s0026261708060015] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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194
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Chernykh A, Myasoedova N, Kolomytseva M, Ferraroni M, Briganti F, Scozzafava A, Golovleva L. Laccase isoforms with unusual properties from the basidiomyceteSteccherinum ochraceumstrain 1833. J Appl Microbiol 2008; 105:2065-75. [DOI: 10.1111/j.1365-2672.2008.03924.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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195
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WIDIASTUTI HAPPY, SUHARYANTO, WULANINGTYAS AGUSTINA, SUTAMIHARDJA. Activity of Ligninolytic Enzymes during Growth and Fruiting Body Development of White Rot Fungi Omphalina sp. and Pleurotus ostreatus. HAYATI JOURNAL OF BIOSCIENCES 2008. [DOI: 10.4308/hjb.15.4.140] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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196
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Chung HJ, Kwon BR, Kim JM, Park SM, Park JK, Cha BJ, Yang MS, Kim DH. A tannic acid-inducible and hypoviral-regulated Laccase3 contributes to the virulence of the chestnut blight fungus Cryphonectria parasitica. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2008; 21:1582-1590. [PMID: 18986254 DOI: 10.1094/mpmi-21-12-1582] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A new laccase gene (lac3) from the chestnut blight fungus Cryphonectria parasitica was induced by the presence of tannic acid, which is abundant in the bark of chestnut trees and is assumed to be one of the major barriers against pathogen infection. However, other commonly known laccase inducers, including ferulic acid, 2,5-xylidine, catechol, and pH, did not induce lac3 transcription. Moreover, the hypovirus modulated the induction of lac3 transcription, abolishing the transcriptional induction of the lac3 gene by tannic acid. A functional analysis of lac3 using a lac3-null mutant indicated that fungal growth and other morphological characteristics, including pigmentation and sporulation, were not affected. However, a virulence assay indicated that the loss of function of a tannic acid-inducible and hypoviral-regulated laccase resulted in reduced virulence without detectable changes in the morphological features. The constitutive expression of lac3 resulted in no significant differences in the necrotic lesions from those caused by the wild type, but its expression in the presence of the hypovirus led to larger lesions than those caused by the hypovirulent strain. These results suggest that the lac3 gene product may not be the only determinant of fungal virulence in chestnut trees but is an important factor.
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Affiliation(s)
- Hea-Jong Chung
- Division of Natural Sciences and Technology, Wonkwang University, Iksan, Chonbuk 570-749, Korea
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197
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Pezzella C, Autore F, Giardina P, Piscitelli A, Sannia G, Faraco V. The Pleurotus ostreatus laccase multi-gene family: isolation and heterologous expression of new family members. Curr Genet 2008; 55:45-57. [DOI: 10.1007/s00294-008-0221-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2008] [Revised: 11/03/2008] [Accepted: 11/08/2008] [Indexed: 10/21/2022]
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198
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Grąz M, Jarosz-Wilkołazka A, Pawlikowska-Pawlęga B. Abortiporus biennis tolerance to insoluble metal oxides: oxalate secretion, oxalate oxidase activity, and mycelial morphology. Biometals 2008; 22:401-10. [DOI: 10.1007/s10534-008-9176-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 10/20/2008] [Indexed: 11/27/2022]
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199
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Gullotto A, Branciamore S, Duchi I, Caño MFP, Randazzo D, Tilli S, Giardina P, Sannia G, Scozzafava A, Briganti F. Combined action of a bacterial monooxygenase and a fungal laccase for the biodegradation of mono- and poly-aromatic hydrocarbons. BIORESOURCE TECHNOLOGY 2008; 99:8353-8359. [PMID: 18407494 DOI: 10.1016/j.biortech.2008.02.054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Revised: 02/22/2008] [Accepted: 02/28/2008] [Indexed: 05/26/2023]
Abstract
The combined action of a wide substrate range toluene o-xylene monooxygenase from Pseudomonas sp. OX1, able to convert many aromatic compounds into mono- and di-hydroxylated derivatives, and fungal laccases from Pleurotus ostreatus which oxidize these hydroxylated products yielding polymers with reduced toxicity is described. This strategy permits to overcome many of the substrate specificity problems and dead end toxic products formation generally encountered in complex bacterial biodegradation pathways. Toluene and naphthalene degradations were tested as representative of mono- and poly-aromatic pollutants. The combined biological action was optimized in micellar and microemulsion systems able to increase the bioavailability of the hydrophobic aromatic pollutants. This approach allows efficient hydroxylations of hydrophobic substrates thus favoring the further action of fungal oxidases.
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Affiliation(s)
- Antonella Gullotto
- Laboratorio di Chimica Bioinorganica, Dipartimento di Chimica, Università di Firenze, Via Della Lastruccia 3, 50019 Firenze, Italy
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200
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Winquist E, Moilanen U, Mettälä A, Leisola M, Hatakka A. Production of lignin modifying enzymes on industrial waste material by solid-state cultivation of fungi. Biochem Eng J 2008. [DOI: 10.1016/j.bej.2008.06.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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