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Alvarado-Ramírez L, Rostro-Alanis MDJ, Rodríguez-Rodríguez J, Hernández Luna CE, Castillo-Zacarías C, Iqbal HMN, Parra-Saldívar R. Biotransformation of 2,4,6-Trinitrotoluene by a cocktail of native laccases from Pycnoporus sanguineus CS43 under oxygenic and non-oxygenic atmospheres. CHEMOSPHERE 2024; 352:141406. [PMID: 38367881 DOI: 10.1016/j.chemosphere.2024.141406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 02/19/2024]
Abstract
2,4,6-Trinitrotoluene (TNT) is a highly toxic nitroaromatic explosive known for its environmental consequences, contaminating soil and groundwater throughout its life cycle, from production to disposal. Therefore, the urgency of developing innovative and ecological strategies to remedy the affected areas is recognized. This study reports, for the first time, the enzymatic biotransformation of TNT by a cocktail of native laccases from Pycnoporus sanguineus CS43. The laccases displayed efficient TNT conversion under both oxygenic and non-oxygenic conditions, achieving biotransformation rates of 80% and 87% within 48 h at a temperature of 60 °C and pH 7. Preliminary kinetic constants were calculated with the laccase cocktail, being a Vmax of 1.133 μM min-1 and 0.2984 μM min-1, and the Km values were 1586 μM and 458 μM, in an oxygenic and non-oxygenic atmosphere, respectively. High-performance liquid chromatography-mass spectrometry (HPLC/MS) confirmed the formation of amino dinitrotoluene isomers and hydroxylamine isomers as biotransformation products. In summary, this study suggests the potential application of laccases for the direct biotransformation of recalcitrant compounds like TNT, offering an environmentally friendly approach to address contamination issues.
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Affiliation(s)
| | | | | | - Carlos Eduardo Hernández Luna
- Laboratorio de Enzimología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Pedro de Alba y Manuel L. Barragán, Cd. Universitaria, 66451, San Nicolás de los Garza, Nuevo León, Mexico.
| | - Carlos Castillo-Zacarías
- Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Departamento de Ingeniería Ambiental, Ciudad Universitaria S/N, San Nicolás de los Garza, Nuevo León, C.P. 66455, Mexico.
| | - Hafiz M N Iqbal
- School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey, 64849, Mexico; Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Monterrey, 64849, Mexico.
| | - Roberto Parra-Saldívar
- School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey, 64849, Mexico; Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Monterrey, 64849, Mexico.
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Bhoyar SS, Chaudhari AU, Desai MA, Latpate RV, Sartale SD, Kodam KM. Wheat bran as an efficient agro-process waste for enhanced yellow laccase production by Lentinus tigrinus SSB_W2 and its application in anthraquinone dye degradation. 3 Biotech 2024; 14:33. [PMID: 38188311 PMCID: PMC10764685 DOI: 10.1007/s13205-023-03881-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 12/07/2023] [Indexed: 01/09/2024] Open
Abstract
Lentinus tigrinus SSB_W2, isolated from Mahabaleshwar in the Western Ghats of Maharashtra, India, was employed to enhance laccase production in solid-state fermentation (SSF). The spectral analysis indicated that the laccase produced by L. tigrinus is a typical yellow laccase, exhibiting no absorption at 600 nm. Notably, this yellow laccase demonstrated exceptional catalytic activity, as confirmed by electrochemical analysis. Four agricultural processing wastes were evaluated as substrates for SSF, and the results showed that L. tigrinus effectively utilized wheat bran. Initial testing by one-factor-at-a-time method showed 3.79-fold increase in yellow laccase production, which subsequently increased to 6.51-fold after Plackett-Burman design. Moreover, employing response surface methodology resulted in 11.87-fold increase (108,472 IU gds-1) in laccase production. The utilization of yellow laccase for the biotransformation of various textile dyes was investigated, and it exhibited the highest degradation efficiency toward Reactive blue 4, a recalcitrant anthraquinone dye, with a rate of 18.36 mg L-1 h-1, for an initial concentration of 1000 mg L-1. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03881-9.
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Affiliation(s)
- Seema S. Bhoyar
- Division of Biochemistry, Department of Chemistry, Savitribai Phule Pune University, Pune, 411007 India
| | - Ashvini U. Chaudhari
- Division of Biochemistry, Department of Chemistry, Savitribai Phule Pune University, Pune, 411007 India
| | - Mangesh A. Desai
- Department of Physics, Savitribai Phule Pune University, Pune, 411007 India
| | - Raosaheb V. Latpate
- Department of Statistics, Savitribai Phule Pune University, Pune, 411007 India
| | | | - Kisan M. Kodam
- Division of Biochemistry, Department of Chemistry, Savitribai Phule Pune University, Pune, 411007 India
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3
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Miettinen O, Vlasák J, Larsson E, Vlasák J, Seelan J, Hernawati, Levicky Q, Larsson KH, Spirin V. A revised genus-level classification for Cerrenaceae ( Polyporales, Agaricomycetes). Fungal Syst Evol 2023; 12:271-322. [PMID: 38455955 PMCID: PMC10918759 DOI: 10.3114/fuse.2023.12.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/28/2023] [Indexed: 03/09/2024] Open
Abstract
Cerrenaceae is a small family of polypores and hydnoid fungi in the order Polyporales (Basidiomycota). The family consists of white-rot fungi, some of which are serious tree pathogens. Combining morphological evidence with a phylogenetic dataset of six genetic markers, we revise generic concepts in the family and propose a seven-genus classification system for the family. Two genera are introduced as new: the monotypic Acanthodontia for Radulodon cirrhatinus, and Lividopora for the Rigidoporus vinctus complex. We re-introduce the name Somion for the Spongipellis delectans complex. Other recognized genera in the family are Cerrena, Irpiciporus, Pseudolagarobasidium, and Radulodon. New species introduced are Irpiciporus branchiformis from Tanzania, Lividopora armeniaca, and L. facilis from Southeast Asia, and Somion strenuum from East Asia. We provide nomenclatural comments on all the names combined to the above Cerrenaceae genera and typify Cerrena unicolor, C. zonata, Polyporus carneopallens (= L. vincta), Somion occarium, and S. unicolor. The genus Hyphoradulum belongs to Cystostereaceae (Agaricales), and we transfer the type species H. conspicuum to Crustomyces. Our study highlights the importance of integrating different basidiocarp types in analyses when revising genus classification in macrofungi. Citation: Miettinen O, Vlasák J, Larsson E, Vlasák J Jr., Seelan JSS, Hernawati, Levicky Q, Larsson K-H, Spirin V (2023). A revised genus-level classification for Cerrenaceae (Polyporales, Agaricomycetes). Fungal Systematics and Evolution 12: 271-322. doi: 10.3114/fuse.2023.12.14.
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Affiliation(s)
- O. Miettinen
- Finnish Museum of Natural History, P.O. Box 7, 00014 University of Helsinki, Finland
| | - J. Vlasák
- Biology Centre, Academy of Sciences of the Czech Republic, Branišovská 31, CZ 37005, České Budĕjovice, Czech Republic
| | - E. Larsson
- Biological and Environmental Sciences, University of Gothenburg, and Gothenburg Global Biodiversity Centre, Box 461, 40530 Gothenburg, Sweden
| | - J. Vlasák
- 207 Silverbrook Dr., Schwenksville, PA, USA
| | - J.S.S. Seelan
- Mycology and Pathology Laboratory, Institute for Tropical Biology and Conservation (ITBC), Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia
| | - Hernawati
- Fakultas Kehutanan (Faculty of Forestry), Universitas Muhammadiyah Sumatera Barat, Padang, Sumatera Barat 25172, Indonesia
| | - Q. Levicky
- The Royal Botanic Gardens, Kew, Richmond, TW9 3AB, UK
| | - K.-H. Larsson
- Natural History Museum, University of Oslo, P.O. Box 1172 Blindern, 0318 Oslo, Norway
| | - V. Spirin
- Finnish Museum of Natural History, P.O. Box 7, 00014 University of Helsinki, Finland
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Zhang LB, Yang WWJ, Qiu TT. Genome-wide study of Cerrena unicolor 87613 laccase gene family and their mode prediction in association with substrate oxidation. BMC Genomics 2023; 24:504. [PMID: 37649000 PMCID: PMC10466755 DOI: 10.1186/s12864-023-09606-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/19/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Laccases are green biocatalysts with wide industrial applications. The study of efficient and specific laccase producers remains a priority. Cerrena species have been shown to be promising basidiomycete candidates for laccase production. Although two sets of Cerrena genome data have been publicly published, no comprehensive bioinformatics study of laccase gene family in C. unicolor has been reported, particularly concerning the analysis of their three-dimensional (3D) structures and molecular docking to substrates, like ABTS and aflatoxin B1 (AFB1). RESULTS In this study, we conducted a comprehensive genome-wide analysis of laccase gene family in C. unicolor 87613. We identified eighteen laccase genes (CuLacs) and classified them into three clades using phylogenetic analysis. We characterized these laccases, including their location in contig 5,6,9,12,15,19,26,27, gene structures of different exon-intron arrangements, molecular weight ranging from 47.89 to 141.41 kDa, acidic pI value, 5-15 conserved protein motifs, signaling peptide of extracellular secretion (harbored by 13 CuLacs) and others. In addition, the analysis of cis-acting element in laccase promoters indicated that the transcription response of CuLac gene family was regulatable and complex under different environmental cues. Furthermore, analysis of transcription pattern revealed that CuLac8, 12 and CuLac2, 13 were the predominant laccases in response to copper ions or oxidative stress, respectively. Finally, we focused on the 3D structure analysis of CuLac proteins. Seven laccases with extra transmembrane domains or special sequences were particularly interesting. Predicted structures of each CuLac protein with or without these extra sequences showed altered interacting amino acid residues and binding sites, leading to varied affinities to both ABTS and AFB1. As far as we know, it is the first time to discuss the influence of the extra sequence on laccase's affinity to substrates. CONCLUSIONS Our findings provide robust genetic data for a better understanding of the laccase gene family in C. unicolor 87613, and create a foundation for the molecular redesign of CuLac proteins to enhance their industrial applications.
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Affiliation(s)
- Long-Bin Zhang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China.
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China.
| | - Wu-Wei-Jie Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
| | - Ting-Ting Qiu
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
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Wu F, Wang H, Chen Q, Pang X, Jing H, Yin L, Zhang X. Lignin Promotes Mycelial Growth and Accumulation of Polyphenols and Ergosterol in Lentinula edodes. J Fungi (Basel) 2023; 9:jof9020237. [PMID: 36836351 PMCID: PMC9960748 DOI: 10.3390/jof9020237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/31/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
It has been demonstrated that lignin was efficiently degraded by Lentinula edodes (L. edodes). However, the process of lignin degradation and utilization by L. edodes has not been discussed in detail. Therefore, the effects of lignin on L. edodes mycelium growth, chemical compositions, and phenolic profiles were investigated herein. It has been revealed that 0.10% lignin acted as the most effective concentration to accelerate mycelia growth, which yielded the highest biomass of 5.32 ± 0.07 g/L. Furthermore, a 0.10% concentration of lignin promoted the accumulation of phenolic compounds, especially protocatechuic acid, with peak value of 48.5 ± 1.2 μg/g. In contrast, the higher concentration of lignin (0.20%) exerted an inhibitory effect on the growth of L. edodes. Overall, the application of lignin at the optimal concentration of 0.10% could not only enhance the mycelial growth but also accumulate the phenolic acids and raise the nutritional and medical values of L. edodes.
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Affiliation(s)
- Feifei Wu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Academy of National Food and Strategic Reserves Administration, Beijing 100037, China
| | - Heqin Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Qiufeng Chen
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiao Pang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Hao Jing
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Lijun Yin
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiuqing Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Correspondence:
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Sun S, Liu P, Ullah M. Efficient Azo Dye Biodecolorization System Using Lignin-Co-Cultured White-Rot Fungus. J Fungi (Basel) 2023; 9:jof9010091. [PMID: 36675912 PMCID: PMC9866751 DOI: 10.3390/jof9010091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/01/2023] [Accepted: 01/02/2023] [Indexed: 01/11/2023] Open
Abstract
The extensive use of azo dyes by the global textile industry induces significant environmental and human health hazards, which makes efficient remediation crucial but also challenging. Improving dye removal efficiency will benefit the development of bioremediation techniques for textile effluents. In this study, an efficient system for azo dye (Direct Red 5B, DR5B) biodecolorization is reported, which uses the white-rot fungus Ganoderma lucidum EN2 and alkali lignin. This study suggests that the decolorization of DR5B could be effectively enhanced (from 40.34% to 95.16%) within 48 h in the presence of alkali lignin. The dye adsorption test further confirmed that the alkali-lignin-enhanced decolorization of DR5B was essentially due to biodegradation rather than physical adsorption, evaluating the role of alkali lignin in the dye biodegradation system. Moreover, the gas chromatography/mass spectrometry analysis and DR5B decolorization experiments also indicated that alkali lignin carried an excellent potential for promoting dye decolorization and displayed a significant role in improving the activity of lignin-modifying enzymes. This was mainly because of the laccase-mediator system, which was established by the induced laccase activity and lignin-derived small aromatic compounds.
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Affiliation(s)
- Su Sun
- College of Urban Construction, Wuchang Shouyi University, Wuhan 430064, China
- Key Laboratory of Molecular Biophysics of MOE, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
- Correspondence:
| | - Pengyang Liu
- Key Laboratory of Molecular Biophysics of MOE, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Mati Ullah
- Key Laboratory of Molecular Biophysics of MOE, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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González-Rodríguez S, Lu-Chau TA, Trueba-Santiso A, Eibes G, Moreira MT. Bundling the removal of emerging contaminants with the production of ligninolytic enzymes from residual streams. Appl Microbiol Biotechnol 2022; 106:1299-1311. [PMID: 35075520 PMCID: PMC8816780 DOI: 10.1007/s00253-022-11776-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/09/2021] [Accepted: 01/09/2022] [Indexed: 12/20/2022]
Abstract
Abstract Enzymes offer interesting features as biological catalysts for industry: high specificity, activity under mild conditions, accessibility, and environmental friendliness. Being able to produce enzymes in large quantities and having them available in a stable and reusable form reduces the production costs of any enzyme-based process. Agricultural residues have recently demonstrated their potential as substrates to produce ligninolytic enzymes by different white rot fungi. In this study, the biotechnological production of a manganese peroxidase (MnP) by Irpex lacteus was conducted through solid-state fermentation (SSF) with wheat straw as substrate and submerged fermentation (SmF) employing wheat straw extract (WSE). The obtained enzyme cocktail also showed manganese-independent activity (MiP), related to the presence of a short MnP and a dye-decolorizing peroxidase (DyP) which was confirmed by shotgun proteomic analyses. In view of the enhanced production of ligninolytic enzymes in SmF, different parameters such as WSE concentration and nitrogen source were evaluated. The highest enzyme titers were obtained with a medium formulated with glucose and peptone (339 U/L MnP and 15 U/L MiP). The scale-up to a 30 L reactor achieved similar activities, demonstrating the feasibility of enzyme production from the residual substrate at different production scales. Degradation of five emerging pollutants was performed to demonstrate the high oxidative capacity of the enzyme. Complete removal of hormones and bisphenol A was achieved in less than 1 h, whereas almost 30% degradation of carbamazepine was achieved in 24 h, which is a significant improvement compared to previous enzymatic treatments of this compound. Key points • Wheat straw extract is suitable for the growth of I. lacteus. • The enzyme cocktail obtained allows the degradation of emerging contaminants. • Mn-dependent and Mn-independent activities increases the catalytic potential. Graphical abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1007/s00253-022-11776-7.
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Improvement of laccase activity by silencing PacC in Ganoderma lucidum. World J Microbiol Biotechnol 2022; 38:32. [PMID: 34989903 DOI: 10.1007/s11274-021-03216-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 12/18/2021] [Indexed: 10/19/2022]
Abstract
Ganoderma lucidum is a representative white-rot fungus that has great potential to degrade lignocellulose biomass. Laccase is recognized as a class of the most important lignin-degrading enzymes in G. lucidum. However, the comprehensive regulatory mechanisms of laccase are still lacking. Based on the genome sequence of G. lucidum, 15 laccase genes were identified and their encoding proteins were analyzed in this study. All of the laccase proteins are predicted to be multicopper oxidases with conserved copper-binding domains. Most laccase proteins were secreted enzymes in addition to Lac14 in which the signal peptide could not be predicted. The activity of all laccases showed the highest level at pH 3.0 or pH 7.0, with total laccase activity of approximately 200 U/mg protein. Silencing PacC resulted in a 5.2 fold increase in laccase activity compared with WT. Five laccase genes (lac1, lac6, lac9, lac10 and lac14) showed an increased transcription levels (approximately 1.5-5.6 fold) in the PacC-silenced strains versus that in WT, while other laccase genes were downregulated or unchanged. The extracellular pH value was about 3.1, which was more acidic in the PacC-silenced strains than in the WT (pH 3.5). Moreover, maintaining the fermentation pH resulted in a downregulation of laccase activity which is induced by silencing PacC. Our findings indicate that in addition to its function in acidification of environmental pH, PacC plays an important role in regulating laccase activity in fungi.
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Adamian Y, Lonappan L, Alokpa K, Agathos SN, Cabana H. Recent Developments in the Immobilization of Laccase on Carbonaceous Supports for Environmental Applications - A Critical Review. Front Bioeng Biotechnol 2021; 9:778239. [PMID: 34938721 PMCID: PMC8685458 DOI: 10.3389/fbioe.2021.778239] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/11/2021] [Indexed: 11/25/2022] Open
Abstract
Τhe ligninolytic enzyme laccase has proved its potential for environmental applications. However, there is no documented industrial application of free laccase due to low stability, poor reusability, and high costs. Immobilization has been considered as a powerful technique to enhance laccase's industrial potential. In this technology, appropriate support selection for laccase immobilization is a crucial step since the support could broadly affect the properties of the resulting catalyst system. Through the last decades, a large variety of inorganic, organic, and composite materials have been used in laccase immobilization. Among them, carbon-based materials have been explored as a support candidate for immobilization, due to their properties such as high porosity, high surface area, the existence of functional groups, and their highly aromatic structure. Carbon-based materials have also been used in culture media as supports, sources of nutrients, and inducers, for laccase production. This study aims to review the recent trends in laccase production, immobilization techniques, and essential support properties for enzyme immobilization. More specifically, this review analyzes and presents the significant benefits of carbon-based materials for their key role in laccase production and immobilization.
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Affiliation(s)
- Younes Adamian
- Université de Sherbrooke Water Research Group, Department of Civil and Building Engineering, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Linson Lonappan
- Université de Sherbrooke Water Research Group, Department of Civil and Building Engineering, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Komla Alokpa
- Université de Sherbrooke Water Research Group, Department of Civil and Building Engineering, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Spiros N. Agathos
- Laboratory of Bioengineering, Earth and Life Institute, Catholic University of Louvain, Louvain-la-Neuve, Belgium
| | - Hubert Cabana
- Université de Sherbrooke Water Research Group, Department of Civil and Building Engineering, Université de Sherbrooke, Sherbrooke, QC, Canada
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10
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Dantas CP, Pinchemel JPD, Jesus GMDE, Pimentel MB, Oliveira OMC, Queiroz AFS, Lima DF. Bioprospection of ligninolytic enzymes from marine origin filamentous fungi. AN ACAD BRAS CIENC 2021; 93:e20210296. [PMID: 34586183 DOI: 10.1590/0001-3765202120210296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 05/16/2021] [Indexed: 11/21/2022] Open
Abstract
Fungi are excellent producers of extracellular enzymes. Therefore, the present study aimed to investigate the screening of marine fungi, which are laccase and manganese peroxidase potential producers, in solid fermentation for future applications in bioremediation processes of contaminated sites. For this purpose, two-level factorial planning was adopted, using time (6 and 15 days) and the absence or presence of oil (0 and 1%) as factors. The semi-quantitative evaluation was carried out by calculating radial growth, enzyme activity and enzyme index by measuring phenol red or syringaldazine oxidation halo. The results showed that all the studied strains showed a positive result for manganese peroxidase production, with an enzymatic activity in solid medium less than 0.61, indicating a strongly positive activity. Through the enzyme index, the study also showed prominence for Penicillium sp. strains, with values > 2. The enzyme index increase in oil presence and the inexpressive use of the genera studied for ligninolytic enzymes production from crude oil demonstrated these data importance for fermentative processes optimization. Considering the ability of these strains to develop into recalcitrant compounds and the potential for manganese peroxidase production, they are indicated for exploitation in various bioremediation technologies, as well as other biotechnological applications.
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Affiliation(s)
- Camila P Dantas
- Universidade Federal da Bahia, Instituto de Geociências, Departamento de Oceanografia, Av. Adhemar de Barros, s/n, Ondina, 40170-110 Salvador, BA, Brazil
| | - João Pedro D Pinchemel
- Universidade Federal da Bahia, Instituto de Geociências, Departamento de Oceanografia, Av. Adhemar de Barros, s/n, Ondina, 40170-110 Salvador, BA, Brazil
| | - Gisele M DE Jesus
- Universidade Federal da Bahia, Instituto de Geociências, Departamento de Oceanografia, Av. Adhemar de Barros, s/n, Ondina, 40170-110 Salvador, BA, Brazil
| | - Milena B Pimentel
- Universidade Federal da Bahia, Instituto de Geociências, Departamento de Oceanografia, Av. Adhemar de Barros, s/n, Ondina, 40170-110 Salvador, BA, Brazil
| | - Olívia Maria C Oliveira
- Universidade Federal da Bahia, Instituto de Geociências, Departamento de Oceanografia, Av. Adhemar de Barros, s/n, Ondina, 40170-110 Salvador, BA, Brazil
| | - Antônio Fernando S Queiroz
- Universidade Federal da Bahia, Instituto de Geociências, Departamento de Oceanografia, Av. Adhemar de Barros, s/n, Ondina, 40170-110 Salvador, BA, Brazil
| | - Danusia F Lima
- Universidade Federal da Bahia, Instituto de Geociências, Departamento de Oceanografia, Av. Adhemar de Barros, s/n, Ondina, 40170-110 Salvador, BA, Brazil
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11
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Chanda K, Mozumder AB, Chorei R, Gogoi RK, Prasad HK. A Lignocellulolytic Colletotrichum sp. OH with Broad-Spectrum Tolerance to Lignocellulosic Pretreatment Compounds and Derivatives and the Efficiency to Produce Hydrogen Peroxide and 5-Hydroxymethylfurfural Tolerant Cellulases. J Fungi (Basel) 2021; 7:785. [PMID: 34682207 PMCID: PMC8540663 DOI: 10.3390/jof7100785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/04/2021] [Accepted: 09/07/2021] [Indexed: 10/25/2022] Open
Abstract
Fungal endophytes are an emerging source of novel traits and biomolecules suitable for lignocellulosic biomass treatment. This work documents the toxicity tolerance of Colletotrichum sp. OH toward various lignocellulosic pretreatment-derived inhibitors. The effects of aldehydes (vanillin, p-hydroxybenzaldehyde, furfural, 5-hydroxymethylfurfural; HMF), acids (gallic, formic, levulinic, and p-hydroxybenzoic acid), phenolics (hydroquinone, p-coumaric acid), and two pretreatment chemicals (hydrogen peroxide and ionic liquid), on the mycelium growth, biomass accumulation, and lignocellulolytic enzyme activities, were tested. The reported Colletotrichum sp. OH was naturally tolerant to high concentrations of single inhibitors like HMF (IC50; 17.5 mM), levulinic acid (IC50; 29.7 mM), hydroquinone (IC50; 10.76 mM), and H2O2 (IC50; 50 mM). The lignocellulolytic enzymes displayed a wide range of single and mixed inhibitor tolerance profiles. The enzymes β-glucosidase and endoglucanase showed H2O2- and HMF-dependent activity enhancements. The enzyme β-glucosidase activity was 34% higher in 75 mM and retained 20% activity in 125 mM H2O2. Further, β-glucosidase activity increased to 24 and 32% in the presence of 17.76 and 8.8 mM HMF. This research suggests that the Colletotrichum sp. OH, or its enzymes, can be used to pretreat plant biomass, hydrolyze it, and remove inhibitory by-products.
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Affiliation(s)
| | | | | | | | - Himanshu Kishore Prasad
- Department of Life Science and Bioinformatics, Assam University, Silchar 788011, India; (K.C.); (A.B.M.); (R.C.); (R.K.G.)
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Tapia-Tussell R, Pereira-Patrón A, Alzate-Gaviria L, Lizama-Uc G, Pérez-Brito D, Solis-Pereira S. Decolorization of Textile Effluent by Trametes hirsuta Bm-2 and lac-T as Possible Main Laccase-Contributing Gene. Curr Microbiol 2020; 77:3953-3961. [PMID: 33025181 DOI: 10.1007/s00284-020-02188-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 08/26/2020] [Indexed: 01/27/2023]
Abstract
The decolorization of dye and textile effluent by Trametes hirsuta was studied in both induced and non-induced media. A removal of 70-100% of the color was achieved through adsorption and the action of laccases. Laccase activity was increased significantly with the addition of grapefruit peel (4000 U/mL) and effluent with grapefruit peel (16,000 U/mL) in comparison with the basal medium (50 U/mL). Analysis of the expression of laccase isoenzymes lac-B and lac-T revealed clear differences in the expression of these genes. The low levels of expression of lac-B in all media suggest a basal or constitutive gene expression, whereas lac-T was over-expressed in the media with effluent, and showed an up/down regulation depending on culture conditions and time. The results obtained suggest that the lac-T gene of T. hirsuta is involved in the decolorization of dyes.
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Affiliation(s)
- Raul Tapia-Tussell
- Renewable Energy Unit, Centro de Investigacion Cientifica de Yucatán, Carretera Sierra Papacal-Chuburna Puerto Km 5, 97302, Mérida, Yucatán, Mexico
| | - Alejandrina Pereira-Patrón
- Department of Chemical and Biochemical Engineering, Tecnologico Nacional de Mexico/IT de Merida, Av. Tecnologico Km 4.5 S/N, 97118, Mérida, Yucatán, Mexico
| | - Liliana Alzate-Gaviria
- Renewable Energy Unit, Centro de Investigacion Cientifica de Yucatán, Carretera Sierra Papacal-Chuburna Puerto Km 5, 97302, Mérida, Yucatán, Mexico
| | - Gabriel Lizama-Uc
- Department of Chemical and Biochemical Engineering, Tecnologico Nacional de Mexico/IT de Merida, Av. Tecnologico Km 4.5 S/N, 97118, Mérida, Yucatán, Mexico
| | - Daisy Pérez-Brito
- GeMBio Laboratory, Centro de Investigación Científica de Yucatan, Calle 43 No. 130 x 32 y 34. Col. Chuburna de Hidalgo, 97205, Mérida, Yucatán, Mexico
| | - Sara Solis-Pereira
- Department of Chemical and Biochemical Engineering, Tecnologico Nacional de Mexico/IT de Merida, Av. Tecnologico Km 4.5 S/N, 97118, Mérida, Yucatán, Mexico.
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13
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Biotransformation of phenolic compounds by Bacillus aryabhattai. Bioprocess Biosyst Eng 2019; 42:1671-1679. [DOI: 10.1007/s00449-019-02163-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 06/24/2019] [Indexed: 12/11/2022]
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Rodrigues EM, Karp SG, Malucelli LC, Helm CV, Alvarez TM. Evaluation of laccase production by Ganoderma lucidum in submerged and solid-state fermentation using different inducers. J Basic Microbiol 2019; 59:784-791. [PMID: 31259434 DOI: 10.1002/jobm.201900084] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 05/18/2019] [Accepted: 06/03/2019] [Indexed: 12/16/2022]
Abstract
Laccases are multicopper oxidases with high potential for industrial applications. Several basidiomycete fungi are natural producers of this enzyme; however, the optimization of production and selection of inducers for increased productivity coupled with low costs is necessary. Lignocellulosic residues are important lignin sources and potential inducers for laccase production. Pinus taeda, a dominant source of wood-based products, has not been investigated for this purpose yet. The aim of this study was to evaluate the production of laccase by the basidiomycete fungus Ganoderma lucidum in the presence of different inducers in submerged and solid-state fermentation. The results of submerged fermentation in presence of 5 μM CuSO 4 , 2 mM ferulic acid, 0.1 g/L P. taeda sawdust, or 0.05 g/L Kraft lignin indicated that although all the tested inducers promoted increase in laccase activity in specific periods of time, the presence of 2 mM ferulic acid resulted in the highest value of laccase activity (49 U/L). Considering the submerged fermentation, experimental design following the Plackett-Burman method showed that the concentrations of ferulic acid and P. taeda sawdust had a significant influence on the laccase activity. The highest value of 785 U/L of laccase activity on submerged fermentation was obtained on the seventh day of cultivation. Finally, solid-state fermentation cultures in P. taeda using ferulic acid or CuSO 4 as inducers resulted in enzymatic activities of 144.62 and 149.89 U/g, respectively, confirming the potential of this approach for laccase production by G. lucidum.
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Affiliation(s)
- Euderléia M Rodrigues
- Master Program in Industrial Biotechnology, Universidade Positivo (UP), Curitiba, Paraná, Brazil
| | - Susan G Karp
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | - Lucca C Malucelli
- Graduate Program in Environmental Management, Universidade Positivo (UP), Curitiba, Paraná, Brazil
| | - Cristiane V Helm
- Embrapa Florestas, Empresa Brasileira de Pesquisa Agropecuária, Colombo, Paraná, Brazil
| | - Thabata M Alvarez
- Master Program in Industrial Biotechnology, Universidade Positivo (UP), Curitiba, Paraná, Brazil
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Noman E, Al-Gheethi A, Mohamed RMSR, Talip BA. Myco-Remediation of Xenobiotic Organic Compounds for a Sustainable Environment: A Critical Review. Top Curr Chem (Cham) 2019; 377:17. [DOI: 10.1007/s41061-019-0241-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 05/08/2019] [Indexed: 01/06/2023]
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Santana TT, Linde GA, Colauto NB, do Valle JS. Metallic-aromatic compounds synergistically induce Lentinus crinitus laccase production. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.10.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Almeida PH, Oliveira ACCDE, Souza GPNDE, Friedrich JC, Linde GA, Colauto NB, Valle JSDO. Decolorization of remazol brilliant blue R with laccase from Lentinus crinitus grown in agro-industrial by-products. AN ACAD BRAS CIENC 2018; 90:3463-3473. [PMID: 29947669 DOI: 10.1590/0001-3765201820170458] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 03/05/2018] [Indexed: 11/22/2022] Open
Abstract
Lentinus crinitus is a white-rot fungus that produces laccase, an enzyme used for dye decolorization. Enzyme production depends on cultivation conditions, mainly agro-industrial by-products. We aimed to produce laccase from Lentinus crinitus with agro-industrial by-products for dye decolorization. Culture medium had coffee husk (CH) or citric pulp pellet (CP) and different nitrogen sources (urea, yeast extract, ammonium sulfate and sodium nitrate) at concentrations of 0, 0.7, 1.4, 2.8, 5.6 and 11.2 g/L. Enzymatic extract was used in the decolorization of remazol brilliant blue R. CH medium promoted greater laccase production than CP in all evaluated conditions. Urea provided the greatest laccase production for CH (37280 U/L) as well as for CP (34107 U/L). In CH medium, laccase activity was suppressed when carbon-to-nitrogen ratio changed from 4.5 to 1.56, but the other nitrogen concentrations did not affect laccase activity. For CP medium, reduction in carbon-to-nitrogen ratio from 6 to 1.76 increased laccase activity in 17%. The peak of laccase activity in CH medium occurred on the 11th day (41246 U/L) and in CP medium on the 12th day (32660 U/L). The maximum decolorization within 24 h was observed with CP enzymatic extract (74%) and with CH extract (76%).
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Affiliation(s)
- Patrícia H Almeida
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agricultura, Universidade Paranaense, Praça Mascarenhas de Moraes, 4282, 87502-210 Umuarama, PR, Brazil
| | - Ana Carolina C DE Oliveira
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agricultura, Universidade Paranaense, Praça Mascarenhas de Moraes, 4282, 87502-210 Umuarama, PR, Brazil
| | - Genyfer P N DE Souza
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agricultura, Universidade Paranaense, Praça Mascarenhas de Moraes, 4282, 87502-210 Umuarama, PR, Brazil
| | - Juliana C Friedrich
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agricultura, Universidade Paranaense, Praça Mascarenhas de Moraes, 4282, 87502-210 Umuarama, PR, Brazil
| | - Giani A Linde
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agricultura, Universidade Paranaense, Praça Mascarenhas de Moraes, 4282, 87502-210 Umuarama, PR, Brazil
| | - Nelson B Colauto
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agricultura, Universidade Paranaense, Praça Mascarenhas de Moraes, 4282, 87502-210 Umuarama, PR, Brazil
| | - Juliana S DO Valle
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agricultura, Universidade Paranaense, Praça Mascarenhas de Moraes, 4282, 87502-210 Umuarama, PR, Brazil
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Du W, Sun C, Wang J, Wang B, Yao Z, Qu F, Xia J, Xie W, Sun J, Duan D. Isolation, identification of a laccase-producing fungal strain and enzymatic properties of the laccase. 3 Biotech 2018; 8:137. [PMID: 29479513 DOI: 10.1007/s13205-018-1149-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 02/02/2018] [Indexed: 10/18/2022] Open
Abstract
A new type of thermostable laccase was isolated from Paraphoma sp. GZS18, and its partial enzymatic properties were determined. A strain GZS18 of laccase with high yield was screened from forest soil and identified as Paraphoma sp. GZS18 through morphological characteristics and ITS sequence analysis. The laccase of Paraphoma sp. GZS18 (Lac-P) was obtained through cation-anion exchange chromatography, gel filtration chromatography, and other purification processes. The testing result shows that Lac-P is a single protein of 75 kDa, and the 11 amino acid sequences in the N-terminal are AXaVSVASREMT (Xa was the non-standard protein). The optimum temperature and optimum pH of lac-P activity are substrate-independent. The temperature is in the range of 50-70 °C, and pH has high catalytic efficiency in the acidic range. Lac-P has good stability in the temperature and pH. The half time at 70-60 °C is 1.5 and 4 h, respectively. At pH 6-9 and room temperature, there is more than 80% activity 24 h later. Lac-P is tolerant of most metal ions and low concentrations of inhibitors but is inhibited by Hg2+, Fe2+ and NaN3. The laccase from Paraphoma sp. GZS18 at high temperature and pH 6-9, with strong stability, has better industrial application characteristics.
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Yoav S, Salame TM, Feldman D, Levinson D, Ioelovich M, Morag E, Yarden O, Bayer EA, Hadar Y. Effects of cre1 modification in the white-rot fungus Pleurotus ostreatus PC9: altering substrate preference during biological pretreatment. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:212. [PMID: 30065786 PMCID: PMC6062969 DOI: 10.1186/s13068-018-1209-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 07/18/2018] [Indexed: 05/16/2023]
Abstract
BACKGROUND During the process of bioethanol production, cellulose is hydrolyzed into its monomeric soluble units. For efficient hydrolysis, a chemical and/or mechanical pretreatment step is required. Such pretreatment is designed to increase enzymatic digestibility of the cellulose chains inter alia by de-crystallization of the cellulose chains and by removing barriers, such as lignin from the plant cell wall. Biological pretreatment, in which lignin is decomposed or modified by white-rot fungi, has also been considered. One disadvantage in biological pretreatment, however, is the consumption of the cellulose by the fungus. Thus, fungal species that attack lignin with only minimal cellulose loss are advantageous. The secretomes of white-rot fungi contain carbohydrate-active enzymes (CAZymes) including lignin-modifying enzymes. Thus, modification of secretome composition can alter the ratio of lignin/cellulose degradation. RESULTS Pleurotus ostreatus PC9 was genetically modified to either overexpress or eliminate (by gene replacement) the transcriptional regulator CRE1, known to act as a repressor in the process of carbon catabolite repression. The cre1-overexpressing transformant demonstrated lower secreted cellulolytic activity and slightly increased selectivity (based on the chemical composition of pretreated wheat straw), whereas the knockout transformant demonstrated increased cellulolytic activity and significantly reduced residual cellulose, thereby displaying lower selectivity. Pretreatment of wheat straw using the wild-type PC9 resulted in 2.8-fold higher yields of soluble sugar compared to untreated wheat straw. The overexpression transformant showed similar yields (2.6-fold), but the knockout transformant exhibited lower yields (1.2-fold) of soluble sugar. Based on proteomic secretome analysis, production of numerous CAZymes was affected by modification of the expression level of cre1. CONCLUSIONS The gene cre1 functions as a regulator for expression of fungal CAZymes active against plant cell wall lignocelluloses, hence altering the substrate preference of the fungi tested. While the cre1 knockout resulted in a less efficient biological pretreatment, i.e., less saccharification of the treated biomass, the converse manipulation of cre1 (overexpression) failed to improve efficiency. Despite the inverse nature of the two genetic alterations, the expected "mirror image" (i.e., opposite regulatory response) was not observed, indicating that the secretion level of CAZymes, was not exclusively dependent on CRE1 activity.
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Affiliation(s)
- Shahar Yoav
- Department of Plant Pathology and Microbiology, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 76100 Israel
| | - Tomer M. Salame
- Flow Cytometry Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, 76100 Israel
| | - Daria Feldman
- Department of Plant Pathology and Microbiology, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 76100 Israel
| | - Dana Levinson
- Department of Plant Pathology and Microbiology, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 76100 Israel
| | | | - Ely Morag
- Department of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, 76100 Israel
| | - Oded Yarden
- Department of Plant Pathology and Microbiology, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 76100 Israel
| | - Edward A. Bayer
- Department of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot, 76100 Israel
| | - Yitzhak Hadar
- Department of Plant Pathology and Microbiology, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 76100 Israel
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Elisashvili V, Kachlishvili E, Asatiani MD, Darlington R, Kucharzyk KH. Physiological Peculiarities of Lignin-Modifying Enzyme Production by the White-Rot Basidiomycete Coriolopsis gallica Strain BCC 142. Microorganisms 2017; 5:microorganisms5040073. [PMID: 29149086 PMCID: PMC5748582 DOI: 10.3390/microorganisms5040073] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 11/09/2017] [Accepted: 11/16/2017] [Indexed: 11/16/2022] Open
Abstract
Sixteen white-rot Basidiomycota isolates were screened for production of lignin-modifying enzymes (LME) in glycerol- and mandarin peel-containing media. In the synthetic medium, Cerrena unicolor strains were the only high laccase (Lac) (3.2–9.4 U/mL) and manganese peroxidase (MnP) (0.56–1.64 U/mL) producers while one isolate Coriolopsis gallica was the only lignin peroxidase (LiP) (0.07 U/mL) producer. Addition of mandarin peels to the synthetic medium promoted Lac production either due to an increase in fungal biomass (Funalia trogii, Trametes hirsuta, and T. versicolor) or enhancement of enzyme production (C. unicolor, Merulius tremellosus, Phlebia radiata, Trametes ochracea). Mandarin peels favored enhanced MnP and LiP secretion by the majority of the tested fungi. The ability of LiP activity production by C. gallica, C. unicolor, F. trogii, T. ochracea, and T. zonatus in the medium containing mandarin-peels was reported for the first time. Several factors, such as supplementation of the nutrient medium with a variety of lignocellulosic materials, nitrogen source or surfactant (Tween 80, Triton X-100) significantly influenced production of LME by a novel strain of C. gallica. Moreover, C. gallica was found to be a promising LME producer with a potential for an easy scale up cultivation in a bioreactor and high enzyme yields (Lac-9.4 U/mL, MnP-0.31 U/mL, LiP-0.45 U/mL).
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Affiliation(s)
- Vladimir Elisashvili
- Agricultural University of Georgia, 240 David Agmashenebeli Alley, 0159 Tbilisi, Georgia.
| | - Eva Kachlishvili
- Agricultural University of Georgia, 240 David Agmashenebeli Alley, 0159 Tbilisi, Georgia.
| | - Mikheil D Asatiani
- Agricultural University of Georgia, 240 David Agmashenebeli Alley, 0159 Tbilisi, Georgia.
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Yang J, Li W, Ng TB, Deng X, Lin J, Ye X. Laccases: Production, Expression Regulation, and Applications in Pharmaceutical Biodegradation. Front Microbiol 2017; 8:832. [PMID: 28559880 PMCID: PMC5432550 DOI: 10.3389/fmicb.2017.00832] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/24/2017] [Indexed: 01/08/2023] Open
Abstract
Laccases are a family of copper-containing oxidases with important applications in bioremediation and other various industrial and biotechnological areas. There have been over two dozen reviews on laccases since 2010 covering various aspects of this group of versatile enzymes, from their occurrence, biochemical properties, and expression to immobilization and applications. This review is not intended to be all-encompassing; instead, we highlighted some of the latest developments in basic and applied laccase research with an emphasis on laccase-mediated bioremediation of pharmaceuticals, especially antibiotics. Pharmaceuticals are a broad class of emerging organic contaminants that are recalcitrant and prevalent. The recent surge in the relevant literature justifies a short review on the topic. Since low laccase yields in natural and genetically modified hosts constitute a bottleneck to industrial-scale applications, we also accentuated a genus of laccase-producing white-rot fungi, Cerrena, and included a discussion with regards to regulation of laccase expression.
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Affiliation(s)
- Jie Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Wenjuan Li
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Tzi Bun Ng
- Faculty of Medicine, School of Biomedical Sciences, The Chinese University of Hong KongShatin, Hong Kong
| | - Xiangzhen Deng
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Juan Lin
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
| | - Xiuyun Ye
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou UniversityFujian, China
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Mishra V, Jana AK, Jana MM, Gupta A. Improvement of selective lignin degradation in fungal pretreatment of sweet sorghum bagasse using synergistic CuSO 4-syringic acid supplements. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 193:558-566. [PMID: 28262421 DOI: 10.1016/j.jenvman.2017.02.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/23/2017] [Accepted: 02/21/2017] [Indexed: 05/28/2023]
Abstract
Sweet sorghum bagasse (SSB) generated in large quantities could be hydrolyzed to sugar and then fermented to green fuels. The hydrolysis of SSB polysaccharides interlocked in recalcitrant lignin network is the major problem. Pretreatment of SSB in SSF by using Coriolus versicolor with CuSO4-syringic acid supplements for effects on production of ligninocellulolytic enzymes, lignin degradation and selectivity values (SV) were studied. C. versicolor was selected based on high ligninolytic and low cellulolytic abilily. Individually, CuSO4 increased the activities of laccase (4.9 folds) and PPO (1.9 folds); syringic acid increased LiP (13 folds), AAO (2.8 folds) and laccase (5.6 folds) resulting in increased lignin degradation and SVs. Combined syringic acid (4.4 μmol g-1 SSB) and CuSO4 (4.4 μmol g-1 SSB) increased the activities of laccase, LiP, MnP, PPO and AAO by 11.2, 17.6, 2.8, 2.4 and 2.3 folds respectively due to synergistic effect, resulting in maximum lignin degradation 35.9 ± 1.3% (w w-1) (1.86 fold) and highest SV 3.07 (4.7 fold). Enzymatic hydrolysis of pretreated SSB yielded higher (∼2.2 times) fermentable sugar. Pretreated SSB was characterized by XRD, SEM, FTIR and TGA/DTG analysis to confirm results. It is possible to improve fungal pretreatment of agricultural waste by combination of supplements.
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Affiliation(s)
- Vartika Mishra
- Department of Biotechnology, Dr B R A National Institute of Technology, Jalandhar, 144011, Punjab, India
| | - Asim K Jana
- Department of Biotechnology, Dr B R A National Institute of Technology, Jalandhar, 144011, Punjab, India.
| | - Mithu Maiti Jana
- Department of Chemistry, Dr B R A National Institute of Technology, Jalandhar, 144011, Punjab, India
| | - Antriksh Gupta
- Department of Biotechnology, Dr B R A National Institute of Technology, Jalandhar, 144011, Punjab, India
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de Araújo Conceição T, Koblitz MGB, Kamida HM, Góes-Neto A. Study of the Production of <i>Lentinus crinitus</i> (L.) Fr. Lignolytic Enzymes Grown on Agro-Industrial Waste. ACTA ACUST UNITED AC 2017. [DOI: 10.4236/abb.2017.88019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Murugesan R, Vembu B. Production of extracellular laccase from the newly isolated Bacillus sp. PK4. ACTA ACUST UNITED AC 2016. [DOI: 10.5897/ajb2016.15509] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Laccase Gene Family in Cerrena sp. HYB07: Sequences, Heterologous Expression and Transcriptional Analysis. Molecules 2016; 21:molecules21081017. [PMID: 27527131 PMCID: PMC6273318 DOI: 10.3390/molecules21081017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 07/26/2016] [Accepted: 07/26/2016] [Indexed: 12/21/2022] Open
Abstract
Laccases are a class of multi-copper oxidases with industrial potential. In this study, eight laccases (Lac1-8) from Cerrena sp. strain HYB07, a white-rot fungus with high laccase yields, were analyzed. The laccases showed moderate identities to each other as well as with other fungal laccases and were predicted to have high redox potentials except for Lac6. Selected laccase isozymes were heterologously expressed in the yeast Pichia pastoris, and different enzymatic properties were observed. Transcription of the eight laccase genes was differentially regulated during submerged and solid state fermentation, as shown by quantitative real-time polymerase chain reaction and validated reference genes. During 6-day submerged fermentation, Lac7 and 2 were successively the predominantly expressed laccase gene, accounting for over 95% of all laccase transcripts. Interestingly, accompanying Lac7 downregulation, Lac2 transcription was drastically upregulated on days 3 and 5 to 9958-fold of the level on day 1. Consistent with high mRNA abundance, Lac2 and 7, but not other laccases, were identified in the fermentation broth by LC-MS/MS. In solid state fermentation, less dramatic differences in transcript abundance were observed, and Lac3, 7 and 8 were more highly expressed than other laccase genes. Elucidating the properties and expression profiles of the laccase gene family will facilitate understanding, production and commercialization of the fungal strain and its laccases.
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Cross-linked enzyme aggregates of Cerrena laccase: Preparation, enhanced NaCl tolerance and decolorization of Remazol Brilliant Blue Reactive. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.04.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kandasamy S, Muniraj IK, Purushothaman N, Sekar A, Sharmila DJS, Kumarasamy R, Uthandi S. High Level Secretion of Laccase (LccH) from a Newly Isolated White-Rot Basidiomycete, Hexagonia hirta MSF2. Front Microbiol 2016; 7:707. [PMID: 27242729 PMCID: PMC4870842 DOI: 10.3389/fmicb.2016.00707] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 04/28/2016] [Indexed: 12/04/2022] Open
Abstract
Newer and novel laccases attract considerable attention due to its promising and valuable multiple applications in biotech industry. This present investigation documents, for the first time, on high level extracellular secretion of laccase (LccH) in newly isolated wood-degrading basidiomycete Hexagonia hirta MSF2. LccH was optimally active at 40°C in citrate phosphate buffer with a pH of 3.4. Optimized Cu(2+) in glucose yeast extract (GY) medium enhanced the LccH production by H. hirta to 1944.44 U.ml(-1). A further increment in LccH activity of 5671.30 U.ml(-1) was achieved by the addition of a phenolic inducer, 2,5 Xylidine. Zymogram and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis of LccH revealed that LccH is a monomer with a molecular mass of 66 kDa. MALDI-TOF-MS based peptide mass fingerprinting and comparative modeling of the amino acid sequence of LccH showed that it was closer to Trametes sp. AH28-2 (PDB: 3KW7) with 48% identity, 95% coverage, 0.011 alignment score and RMSD of 0.497Å. Crude LccH delignified lignocellulosic biomass such as wood and corncob, to a level of 28.6 and 16.5%, respectively. Such high level secretion, thermal and solvent stability of LccH make H. hirta a potential candidate not only for LccH production and biodelignification but also generation of lignin derived aromatic feed stock chemicals for industrial and environmental applications.
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Affiliation(s)
- Sujatha Kandasamy
- Department of Agricultural Microbiology, Tamil Nadu Agricultural UniversityCoimbatore, India
| | - Iniya K. Muniraj
- Department of Agricultural Microbiology, Tamil Nadu Agricultural UniversityCoimbatore, India
| | - Namitha Purushothaman
- Department of Agricultural Microbiology, Tamil Nadu Agricultural UniversityCoimbatore, India
| | - Ashika Sekar
- Department of Agricultural Microbiology, Tamil Nadu Agricultural UniversityCoimbatore, India
| | - D. J. S. Sharmila
- Department of Nanoscience and Technology, Tamil Nadu Agricultural UniversityCoimbatore, India
| | - Ramasamy Kumarasamy
- Department of Agricultural Microbiology, Tamil Nadu Agricultural UniversityCoimbatore, India
| | - Sivakumar Uthandi
- Department of Agricultural Microbiology, Tamil Nadu Agricultural UniversityCoimbatore, India
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Kachlishvili E, Asatiani M, Kobakhidze A, Elisashvili V. Trinitrotoluene and mandarin peels selectively affect lignin-modifying enzyme production in white-rot basidiomycetes. SPRINGERPLUS 2016; 5:252. [PMID: 27026944 PMCID: PMC4773374 DOI: 10.1186/s40064-016-1895-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Accepted: 02/17/2016] [Indexed: 11/10/2022]
Abstract
Five white-rot basidiomycetes (WRB) species have been evaluated for their potential to tolerate and to degrade 0.2 mM 2, 4, 6-trinitrotoluene (TNT) as well as to produce laccase and manganese peroxidase (MnP) in presence of this xenobiotic. The tested fungal strains produced laccase in both glycerol and mandarin peels-containing media, whereas in the glycerol-containing medium only Cerrena unicolor strains and Trametes versicolor BCC 775 secreted MnP. Replacement of glycerol by milled mandarin peels 3- to 45-fold increased laccase activity, promoted C. unicolor strains and T. versicolor MnP secretion and induced this enzyme production by Fomes fomentarius BCC 38 and Funalia trogii BCC 146. Differential response of the WRB strains to the TNT addition was observed. In particular, laccase activity of C. unicolor increased 2- to 3-fold in both media whereas no stimulation of the laccase production was revealed in cultivation of F. fomentarius. TNT practically did not affect the MnP activity. Two strains of C. unicolor followed by T. versicolor producing laccase and MnP almost completely removed 0.2 mM TNT from the synthetic medium. Increase of TNT concentration from 0 to 0.4 mM in the mandarin peels-based medium and from 0 to 0.3 mM in the glycerol-containing medium stimulated C. unicolor BCC 300 laccase production from 92.4 to 240.7 U/ml and from 17.1 to 48.6 U/ml, respectively. This strain has been resistant to the TNT high concentration and has ability to remove 85 % of initial 0.3 mM TNT content during 6 days of the submerged cultivation.
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Affiliation(s)
- Eva Kachlishvili
- Department of Plant Substrates Bioconversion, Agricultural University of Georgia, 240 David Agmashenebeli alley, 0159 Tbilisi, Georgia
| | - Mikheil Asatiani
- Department of Plant Substrates Bioconversion, Agricultural University of Georgia, 240 David Agmashenebeli alley, 0159 Tbilisi, Georgia
| | - Aza Kobakhidze
- Department of Plant Substrates Bioconversion, Agricultural University of Georgia, 240 David Agmashenebeli alley, 0159 Tbilisi, Georgia
| | - Vladimir Elisashvili
- Department of Plant Substrates Bioconversion, Agricultural University of Georgia, 240 David Agmashenebeli alley, 0159 Tbilisi, Georgia
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Yang J, Wang G, Ng TB, Lin J, Ye X. Laccase Production and Differential Transcription of Laccase Genes in Cerrena sp. in Response to Metal Ions, Aromatic Compounds, and Nutrients. Front Microbiol 2016; 6:1558. [PMID: 26793186 PMCID: PMC4710055 DOI: 10.3389/fmicb.2015.01558] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 12/22/2015] [Indexed: 11/30/2022] Open
Abstract
Laccases can oxidize a wide range of aromatic compounds and are industrially valuable. Laccases often exist in gene families and may differ from each other in expression and function. Quantitative real-time polymerase chain reaction (qPCR) was used for transcription profiling of eight laccase genes in Cerrena sp. strain HYB07 with validated reference genes. A high laccase activity of 280.0 U/mL was obtained after submerged fermentation for 5 days. Laccase production and laccase gene transcription at different fermentation stages and in response to various environmental cues were revealed. HYB07 laccase activity correlated with transcription levels of its predominantly expressed laccase gene, Lac7. Cu2+ ions were indispensable for efficient laccase production by HYB07, mainly through Lac7 transcription induction, and no aromatic compounds were needed. HYB07 laccase synthesis and biomass accumulation were highest with non-limiting carbon and nitrogen. Glycerol and inorganic nitrogen sources adversely impacted Lac7 transcription, laccase yields, and fungal growth. The present study would further our understanding of transcription regulation of laccase genes, which may in turn facilitate laccase production as well as elucidation of their physiological roles.
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Affiliation(s)
- Jie Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University Fuzhou, China
| | - Guozeng Wang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University Fuzhou, China
| | - Tzi Bun Ng
- Faculty of Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong Hong Kong, China
| | - Juan Lin
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University Fuzhou, China
| | - Xiuyun Ye
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University Fuzhou, China
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30
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Manavalan T, Manavalan V, Thangavelu KP, Kutzner A, Heese K. Characterization of a Solvent-Tolerant Manganese Peroxidase (MnP) from G
anoderma Lucidum
and Its Application in Fruit Juice Clarification. J Food Biochem 2015. [DOI: 10.1111/jfbc.12188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Tamilvendan Manavalan
- Centre for Advanced Studies in Botany; University of Madras; Chennai Tamil Nadu 600025 India
| | - Vetriselvan Manavalan
- Department of Pharmacology and Toxicology; University of Arkansas for Medical Sciences; Little Rock AR
| | - Kalaichelvan P. Thangavelu
- Centre for Advanced Studies in Botany; University of Madras; Chennai Tamil Nadu 600025 India
- Alka-Research Foundation; Coimbatore Tamil Nadu 641046 India
| | - Arne Kutzner
- Department of Information Systems; College of Engineering; Hanyang University; 222 Wangsimni-ro Seoul Seongdong-gu 133-791 Rep. of Korea
| | - Klaus Heese
- Graduate School of Biomedical Science and Engineering; Hanyang University; 222 Wangsimni-ro Seoul Seongdong-gu 133-791 Rep. of Korea
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31
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Du W, Sun C, Liang J, Han Y, Yu J, Liang Z. Improvement of Laccase Production and its Characterization by Mutagenesis. J Food Biochem 2015. [DOI: 10.1111/jfbc.12111] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- W. Du
- School of Basic Medical Science; Guiyang College of Traditional Chinese Medicine; Guiyang 550002 China
| | - C. Sun
- Center of Biochemical Engineering in Guizhou Province; China
| | - J. Liang
- School of Basic Medical Science; Guiyang College of Traditional Chinese Medicine; Guiyang 550002 China
| | - Y. Han
- Institutes of Fungus Resources; Guizhou University; Guiyang 550025 China
| | - J. Yu
- Biochemistry and Nutrition; Guizhou University; Guiyang 550025 China
| | - Z. Liang
- Institutes of Fungus Resources; Guizhou University; Guiyang 550025 China
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32
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Kuhar F, Papinutti L. Optimization of laccase production by two strains of Ganoderma lucidum using phenolic and metallic inducers. Rev Argent Microbiol 2014; 46:144-9. [PMID: 25011599 DOI: 10.1016/s0325-7541(14)70063-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 04/30/2014] [Indexed: 10/25/2022] Open
Abstract
Ganoderma lucidum (Curtis) P. Karst is a white rot fungus that is able to degrade the lignin component in wood. The ability of two strains of this species to produce the ligninolytic enzyme laccase was assessed. After the evaluation of induction with heavy metals and phenolic compounds, it was found that among the tested substances, copper and ferulic acid are the best laccase inducers. It was also observed that the two types of inducers (phenolic and metallic) produce different electrophoretic patterns of laccase activity. Optimized concentrations of inducers were obtained through a factorial design and the thermal stability of optimized supernatants was studied at a wide range of acidic pH. We found that the enzyme is more thermostable at higher pH values.
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Affiliation(s)
- Francisco Kuhar
- Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Esquel, Chubut, Argentina.
| | - Leandro Papinutti
- Laboratorio de Micología Experimental, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Ciudad Autónoma de Buenos Aires, Argentina
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33
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Zhao D, Cui DZ, Mu JS, Zhang X, Wang Y, Zhao M. Induction of a white laccase from the deuteromyceteMyrothecium verrucariaNF-05 and its potential in decolorization of dyes. BIOCATAL BIOTRANSFOR 2014. [DOI: 10.3109/10242422.2014.934681] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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34
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Bettin F, Montanari Q, Calloni R, Gaio TA, Silveira MM, Dillon AJP. Additive effects of CuSO4 and aromatic compounds on laccase production by Pleurotus sajor-caju PS-2001 using sucrose as a carbon source. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2014. [DOI: 10.1590/0104-6632.20140312s00002241] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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35
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Fungal laccases and their applications in bioremediation. Enzyme Res 2014; 2014:163242. [PMID: 24959348 PMCID: PMC4052089 DOI: 10.1155/2014/163242] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 04/22/2014] [Indexed: 12/25/2022] Open
Abstract
Laccases are blue multicopper oxidases, which catalyze the monoelectronic oxidation of a broad spectrum of substrates, for example, ortho- and para-diphenols, polyphenols, aminophenols, and aromatic or aliphatic amines, coupled with a full, four-electron reduction of O2 to H2O. Hence, they are capable of degrading lignin and are present abundantly in many white-rot fungi. Laccases decolorize and detoxify the industrial effluents and help in wastewater treatment. They act on both phenolic and nonphenolic lignin-related compounds as well as highly recalcitrant environmental pollutants, and they can be effectively used in paper and pulp industries, textile industries, xenobiotic degradation, and bioremediation and act as biosensors. Recently, laccase has been applied to nanobiotechnology, which is an increasing research field, and catalyzes electron transfer reactions without additional cofactors. Several techniques have been developed for the immobilization of biomolecule such as micropatterning, self-assembled monolayer, and layer-by-layer techniques, which immobilize laccase and preserve their enzymatic activity. In this review, we describe the fungal source of laccases and their application in environment protection.
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36
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Bento T, Torres L, Fialho M, Bononi V. Growth inhibition and antioxidative response of wood decay fungi exposed to plant extracts of Casearia
species. Lett Appl Microbiol 2013; 58:79-86. [DOI: 10.1111/lam.12159] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 08/28/2013] [Accepted: 09/09/2013] [Indexed: 11/26/2022]
Affiliation(s)
- T.S. Bento
- Instituto de Botânica de São Paulo; Núcleo de Pesquisa em Micologia; São Paulo Brazil
| | - L.M.B. Torres
- Instituto de Botânica de São Paulo; Núcleo de Pesquisa em Fisiologia e Bioquímica de Plantas; São Paulo Brazil
| | - M.B. Fialho
- Instituto de Botânica de São Paulo; Núcleo de Pesquisa em Fisiologia e Bioquímica de Plantas; São Paulo Brazil
| | - V.L.R. Bononi
- Instituto de Botânica de São Paulo; Núcleo de Pesquisa em Micologia; São Paulo Brazil
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37
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Characterization of optimized production, purification and application of laccase from Ganoderma lucidum. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2012.10.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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38
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Du W, Sun C, Yu J, Liang J, Liang Z, Han Y, Zou X. Effect of synergistic inducement on the production of laccase by a novel Shiraia bambusicola strain GZ11K2. Appl Biochem Biotechnol 2012; 168:2376-86. [PMID: 23079890 DOI: 10.1007/s12010-012-9943-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 10/05/2012] [Indexed: 12/22/2022]
Abstract
In this study, an easily detectable method was employed for screening laccase-producing microorganisms by using 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) as laccase secretion indicator. A novel laccase-producing strain was isolated and identified as Shiraia bambusicola Henn. strain GZ11K2 according to the morphological characteristics and the comparison of internal transcribed spacer ribosomal DNA gene sequences. In further investigation, the production of laccase by S. bambusicola GZ11K2 was greatly enhanced by the nontoxic inducers of copper sulfate and rhodamine B. Copper and rhodamine B were added into the cultivation medium at 24 and 12 h, respectively, and the maximum laccase production was obtained. Under the induction of 2.0 mM copper sulfate and 35 μM rhodamine B, an increment of about 80 times of laccase activity compared with that in the inducer-free medium and about 20 times compared with that in the single copper-supplemented medium was observed. Compared with other species, S. bambusicola GZ11K2 exhibits better laccase-producing characteristics with an activity of 16,400 U/L after 108 h, suggesting its potential ability for industrial application.
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Affiliation(s)
- Wen Du
- Institute of Biochemistry and Nutrition, Guizhou University, Guiyang, China.
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39
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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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