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Mottaghi Amlashi D, Mobini S, Shahedi M, Habibi Z, Bavandi H, Yousefi M. Biocatalytic synthesis of oxa(thia)diazole aryl thioethers. Sci Rep 2024; 14:19468. [PMID: 39174618 PMCID: PMC11341560 DOI: 10.1038/s41598-024-70239-3] [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: 06/17/2024] [Accepted: 08/14/2024] [Indexed: 08/24/2024] Open
Abstract
A novel approach for the synthesis of 1,3,4-oxa(thia)diazole aryl thioethers through a biocatalytic strategy has been introduced. By leveraging Myceliophthora thermophila laccase (Novozym 51003) as a catalyst, catechol undergoes oxidation to ortho-quinone, facilitating subsequent 1,4-thia-Michael addition reactions. The method offers efficiency and mild reaction conditions, demonstrating promise for sustainable synthesis pathways in organic chemistry. Using this approach, 13 new derivatives of 2,5-disubstituted-1,3,4-oxa(thia)diazole aryl thioethers, with a yield of 46-94%, were synthesized.
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Affiliation(s)
- Donya Mottaghi Amlashi
- Department of Organic Chemistry, Shahid Beheshti University, Daneshjou Boulevard, Tehran, 1983969411, Iran
| | - Sepideh Mobini
- Department of Organic Chemistry, Shahid Beheshti University, Daneshjou Boulevard, Tehran, 1983969411, Iran
| | - Mansour Shahedi
- Department of Organic Chemistry, Shahid Beheshti University, Daneshjou Boulevard, Tehran, 1983969411, Iran
| | - Zohreh Habibi
- Department of Organic Chemistry, Shahid Beheshti University, Daneshjou Boulevard, Tehran, 1983969411, Iran.
| | - Hossein Bavandi
- Department of Organic Chemistry, Shahid Beheshti University, Daneshjou Boulevard, Tehran, 1983969411, Iran
| | - Maryam Yousefi
- Avicenna Research Institute, Nanobiotechnology Research Center, ACECR, Tehran, Iran.
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2
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Enzyme-catalyzed synthesis of bioactive heterocycles. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2021-0103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Enzymes are proteins that functions as biological catalyst. It is now a known fact that enzyme can catalyze many synthetic operations better than the conventional reagents. Not only in the synthesis of natural products, they can also be applied for construction of varieties of unnatural compounds. In this chapter, Pariyar and Ghosh have discussed in brief synthesis of various biologically active heterocyclic compounds using different enzymes as catalysts. Among various enzymes, laccases, trypsin, α-amylase and Bakers’ yeast are few that are easily available and have been extensively explored for various synthetic strategies. This chapter will definitely serve as valuable source of information to the readers in the field of enzyme-catalyzed reactions.
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3
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Sousa AC, Martins LO, Robalo MP. Laccases: Versatile Biocatalysts for the Synthesis of Heterocyclic Cores. Molecules 2021; 26:3719. [PMID: 34207073 PMCID: PMC8234338 DOI: 10.3390/molecules26123719] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/10/2021] [Accepted: 06/14/2021] [Indexed: 12/14/2022] Open
Abstract
Laccases are multicopper oxidases that have shown a great potential in various biotechnological and green chemistry processes mainly due to their high relative non-specific oxidation of phenols, arylamines and some inorganic metals, and their high redox potentials that can span from 500 to 800 mV vs. SHE. Other advantages of laccases include the use of readily available oxygen as a second substrate, the formation of water as a side-product and no requirement for cofactors. Importantly, addition of low-molecular-weight redox mediators that act as electron shuttles, promoting the oxidation of complex bulky substrates and/or of higher redox potential than the enzymes themselves, can further expand their substrate scope, in the so-called laccase-mediated systems (LMS). Laccase bioprocesses can be designed for efficiency at both acidic and basic conditions since it is known that fungal and bacterial laccases exhibit distinct optimal pH values for the similar phenolic and aromatic amines. This review covers studies on the synthesis of five- and six-membered ring heterocyclic cores, such as benzimidazoles, benzofurans, benzothiazoles, quinazoline and quinazolinone, phenazine, phenoxazine, phenoxazinone and phenothiazine derivatives. The enzymes used and the reaction protocols are briefly outlined, and the mechanistic pathways described.
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Affiliation(s)
- Ana Catarina Sousa
- Área Departamental de Engenharia Química, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal;
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Lígia O. Martins
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - M. Paula Robalo
- Área Departamental de Engenharia Química, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal;
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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4
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Sun K, Li S, Si Y, Huang Q. Advances in laccase-triggered anabolism for biotechnology applications. Crit Rev Biotechnol 2021; 41:969-993. [PMID: 33818232 DOI: 10.1080/07388551.2021.1895053] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This is the first comprehensive overview of laccase-triggered anabolism from fundamental theory to biotechnology applications. Laccase is a typical biological oxidordeuctase that induces the one-electronic transfer of diverse substrates for engendering four phenoxy radicals with concomitant reduction of O2 into 2H2O. In vivo, laccase can participate in anabolic processes to create multifarious functional biopolymers such as fungal pigments, plant lignins, and insect cuticles, using mono/polyphenols and their derivatives as enzymatic substrates, and is thus conducive to biological tissue morphogenesis and global carbon storage. Exhilaratingly, fungal laccase has high redox potential (E° = 500-800 mV) and thermodynamic efficiency, making it a remarkable candidate for utilization as a versatile catalyst in the green and circular economy. This review elaborates the anabolic mechanisms of laccase in initiating the polymerization of natural phenolic compounds and their derivatives in vivo via radical-based self/cross-coupling. Information is also presented on laccase immobilization engineering that expands the practical application ranges of laccase in biotechnology by improving the enzymatic catalytic activity, stability, and reuse rate. Particularly, advances in biotechnology applications in vitro through fungal laccase-triggered macromolecular biosynthesis may provide a key research direction beneficial to the rational design of green chemistry.
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Affiliation(s)
- Kai Sun
- Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui, China
| | - Shunyao Li
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Youbin Si
- Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui, China
| | - Qingguo Huang
- College of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences, University of Georgia, Griffin, GA, USA
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5
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Abstract
Laccases are multicopper oxidases, which have been widely investigated in recent decades thanks to their ability to oxidize organic substrates to the corresponding radicals while producing water at the expense of molecular oxygen. Besides their successful (bio)technological applications, for example, in textile, petrochemical, and detoxifications/bioremediations industrial processes, their synthetic potentialities for the mild and green preparation or selective modification of fine chemicals are of outstanding value in biocatalyzed organic synthesis. Accordingly, this review is focused on reporting and rationalizing some of the most recent and interesting synthetic exploitations of laccases. Applications of the so-called laccase-mediator system (LMS) for alcohol oxidation are discussed with a focus on carbohydrate chemistry and natural products modification as well as on bio- and chemo-integrated processes. The laccase-catalyzed Csp2-H bonds activation via monoelectronic oxidation is also discussed by reporting examples of enzymatic C-C and C-O radical homo- and hetero-couplings, as well as of aromatic nucleophilic substitutions of hydroquinones or quinoids. Finally, the laccase-initiated domino/cascade synthesis of valuable aromatic (hetero)cycles, elegant strategies widely documented in the literature across more than three decades, is also presented.
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Hahn V, Mikolasch A, Weitemeyer J, Petters S, Davids T, Lalk M, Lackmann JW, Schauer F. Ring-Closure Mechanisms Mediated by Laccase to Synthesize Phenothiazines, Phenoxazines, and Phenazines. ACS OMEGA 2020; 5:14324-14339. [PMID: 32596570 PMCID: PMC7315418 DOI: 10.1021/acsomega.0c00719] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 04/24/2020] [Indexed: 05/31/2023]
Abstract
The green and environmentally friendly synthesis of highly valuable organic substances is one possibility for the utilization of laccases (EC 1.10.3.2). As reactants for the herein described syntheses, different o-substituted arylamines or arylthiols and 2,5-dihydroxybenzoic acid and its derivatives were used. In this way, the formation of phenothiazines, phenoxazines, and phenazines was achieved in aqueous solution mediated by the laccase of Pycnoporus cinnabarinus in the presence of oxygen. Two types of phenothiazines (3-hydroxy- and 3-oxo-phenothiazines) formed in one reaction assay were described for the first time. The cyclization reactions yielded C-N, C-S, or C-O bonds. The syntheses were investigated with regard to the substitution pattern of the reaction partners. Differences in C-S and C-N bond formations without cyclization are discussed.
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Affiliation(s)
- Veronika Hahn
- Institut
für Mikrobiologie, Universität
Greifswald, Friedrich-Ludwig-Jahn Str. 15, 17487 Greifswald, Germany
- Leibniz-Institut
für Plasmaforschung und Technologie e.V. (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany
| | - Annett Mikolasch
- Institut
für Mikrobiologie, Universität
Greifswald, Friedrich-Ludwig-Jahn Str. 15, 17487 Greifswald, Germany
| | - Josephine Weitemeyer
- Institut
für Mikrobiologie, Universität
Greifswald, Friedrich-Ludwig-Jahn Str. 15, 17487 Greifswald, Germany
| | - Sebastian Petters
- Institut
für Mikrobiologie, Universität
Greifswald, Friedrich-Ludwig-Jahn Str. 15, 17487 Greifswald, Germany
| | - Timo Davids
- Institut
für Mikrobiologie, Universität
Greifswald, Friedrich-Ludwig-Jahn Str. 15, 17487 Greifswald, Germany
| | - Michael Lalk
- Institut
für Biochemie, Universität
Greifswald, Felix-Hausdorff-Str. 4, 17487 Greifswald, Germany
| | - Jan-Wilm Lackmann
- Leibniz-Institut
für Plasmaforschung und Technologie e.V. (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany
| | - Frieder Schauer
- Institut
für Mikrobiologie, Universität
Greifswald, Friedrich-Ludwig-Jahn Str. 15, 17487 Greifswald, Germany
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7
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Gamov GA, Zavalishin MN, Khokhlova AY, Gashnikova AV, Kiselev AN, Zav’yalov AV, Aleksandriiskii VV. Kinetics of the Oxidation of Protocatechuic and Gallic Acids by Atmospheric Oxygen in the Presence of Laccase from T. versicolor. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420020119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Design and synthesis of a versatile cooperative catalytic aerobic oxidation system with co-immobilization of palladium nanoparticles and laccase into the cavities of MCF. J Catal 2020. [DOI: 10.1016/j.jcat.2019.12.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Sdahl M, Conrad J, Braunberger C, Beifuss U. Efficient and sustainable laccase-catalyzed iodination of p-substituted phenols using KI as iodine source and aerial O 2 as oxidant. RSC Adv 2019; 9:19549-19559. [PMID: 35519358 PMCID: PMC9065379 DOI: 10.1039/c9ra02541c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 05/27/2019] [Indexed: 11/26/2022] Open
Abstract
The laccase-catalyzed iodination of p-hydroxyarylcarbonyl- and p-hydroxyarylcarboxylic acid derivatives using KI as iodine source and aerial oxygen as the oxidant delivers the corresponding iodophenols in a highly efficient and sustainable manner with yields up to 93% on a preparative scale under mild reaction conditions.
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Affiliation(s)
- Mark Sdahl
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim Garbenstr. 30 Stuttgart D-70599 Germany +49 711 459 22951 +49 711 459 22171
| | - Jürgen Conrad
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim Garbenstr. 30 Stuttgart D-70599 Germany +49 711 459 22951 +49 711 459 22171
| | - Christina Braunberger
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim Garbenstr. 30 Stuttgart D-70599 Germany +49 711 459 22951 +49 711 459 22171
| | - Uwe Beifuss
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim Garbenstr. 30 Stuttgart D-70599 Germany +49 711 459 22951 +49 711 459 22171
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10
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Sharma A, Jain KK, Jain A, Kidwai M, Kuhad RC. Bifunctional in vivo role of laccase exploited in multiple biotechnological applications. Appl Microbiol Biotechnol 2018; 102:10327-10343. [PMID: 30406827 DOI: 10.1007/s00253-018-9404-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/08/2018] [Accepted: 09/10/2018] [Indexed: 12/29/2022]
Abstract
Laccases are multicopper enzymes present in plants, fungi, bacteria, and insects, which catalyze oxidation reactions together with four electron reduction of oxygen to water. Plant, bacterial, and insect laccases have a polymerizing role in nature, implicated in biosynthesis of lignin, melanin formation, and cuticle hardening, respectively. On the other hand, fungal laccases carry out both polymerizing (melanin synthesis and fruit body formation) as well as depolymerizing roles (lignin degradation). This bifunctionality of fungal laccases can be attributed to the presence of multiple isoforms within the same as well as different genus and species. Interestingly, by manipulating culture conditions, these isoforms with their different induction patterns and unique biochemical characteristics can be expressed or over-expressed for a targeted biotechnological application. Consequently, laccases can be considered as one of the most important biocatalyst which can be exploited for divergent industrial applications viz. paper pulp bleaching, fiber modification, dye decolorization, bioremediation as well as organic synthesis. The present review spotlights the role of fungal laccases in various antagonistic applications, i.e., polymerizing and depolymerizing, and co-relating this dual role with potential industrial significance.
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Affiliation(s)
- Abha Sharma
- Lignocellulose Biotechnology laboratory, Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Kavish Kumar Jain
- Lignocellulose Biotechnology laboratory, Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India
| | - Arti Jain
- Green Chemistry laboratory, Department of Chemistry, University of Delhi, North Campus, New Delhi, 110007, India
| | - Mazahir Kidwai
- Green Chemistry laboratory, Department of Chemistry, University of Delhi, North Campus, New Delhi, 110007, India
| | - R C Kuhad
- Lignocellulose Biotechnology laboratory, Department of Microbiology, University of Delhi South Campus, New Delhi, 110021, India.
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11
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Rostami A, Mohammadi B, Shokri Z, Saadati S. Laccase-TEMPO as an efficient catalyst system for metal- and halogen-free aerobic oxidation of thioethers to sulfoxides in aqueous media at ambient conditions. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.03.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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12
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Luo S, Xie T, Liu Z, Sun F, Wang G. The development of CotA mediator cocktail system for dyes decolorization. J Appl Microbiol 2018; 124:1164-1174. [PMID: 29405567 DOI: 10.1111/jam.13721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/23/2018] [Accepted: 01/30/2018] [Indexed: 01/28/2023]
Abstract
AIMS The increasing use of dyes leads to serious environmental concerns, it is significant to explore eco-friendly and economic approaches for dye decolorization. This study aimed to develop mediator cocktail (AS and ABTS) for enhancing the capability of laccase-mediator system in the removal of dyes. METHODS AND RESULTS By mediator screening, the mediators of ABTS and AS (ABTS, 2, 2'-azino-bis-(3-ethylbenzothiazo-thiazoline-6-sulphonic acid); AS, acetosyringone) were combined for dyes decolorization. The Box-Behnken Design and response surface analysis was performed to optimize experiment conditions. Comparing the CotA-ABTS-AS cocktail system with CotA-single mediator system showed that the coupling of ABTS and AS could increase the decolorization rate 15 times higher, save a third of the cost and shorten the reaction time by 50%. In addition, our studies revealed that sequential oxidation may occur in CotA-ABTS-AS system. CONCLUSIONS Compared with CotA laccase-single mediator system, the CotA-ABTS-AS cocktail system showed advantages including higher efficiency, lower cost and shorter reaction time. SIGNIFICANCE AND IMPACT OF THE STUDY This was the first report on the dyes decolorization by laccase mediator cocktail system. These results paved the curb for the application of laccase mediator system in various industrial processes.
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Affiliation(s)
- S Luo
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, China.,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, China.,University of Chinese Academy of Science, Beijing, China
| | - T Xie
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, China.,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, China
| | - Z Liu
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, China.,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, China
| | - F Sun
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - G Wang
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, China.,Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, China
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13
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Laccase-mediated synthesis of lignin-core hyperbranched copolymers. Appl Microbiol Biotechnol 2017; 101:6343-6353. [PMID: 28589227 DOI: 10.1007/s00253-017-8325-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/12/2017] [Accepted: 04/29/2017] [Indexed: 12/27/2022]
Abstract
Lignin, one of the major chemical constituents of woody biomass, is the second most abundant biopolymer found in nature. The pulp and paper industry has long produced lignin on the scale of millions of tons annually as a by-product of the pulping process, and the dawn of cellulosic ethanol production has further contributed to this amount. Historically, lignin has been perceived as a waste material and burned as a fuel for the pulping process. However, recent research has been geared toward developing cost-effective technologies to convert lignin into valuable commodities. Attributing to the polyphenolic structure of lignin, enzymatic modification of its surface using laccases (benzenediol:oxygen oxidoreductases, EC 1.10.3.2) has demonstrated to be highly successful. The current study aims at developing lignin-core hyperbranched copolymers via the laccase-assisted copolymerization of kraft lignin with methylhydroquinone and a trithiol. Based on the physical properties of the resulting material, it is likely that crosslinking reactions have taken place during the drying process to produce a copolymeric network rather than discrete hyperbranched copolymers, with NMR data providing evidence of covalent bonding between monomers. Preliminary thermal analysis data reveals that the copolymeric material possesses a moderate glass transition temperature and exhibits good thermostability, thus may have potential application as a lignin-based thermoplastic. Scanning electron microscopy images confirm the smooth, glossy surface of the material and that it is densely packed. The presented results are a sustainable, ecofriendly, economic method to create an exciting novel biomaterial from a renewable feedstock while further enhancing lignin valorization.
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14
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Abdel-Mohsen HT, Conrad J, Harms K, Nohr D, Beifuss U. Laccase-catalyzed green synthesis and cytotoxic activity of novel pyrimidobenzothiazoles and catechol thioethers. RSC Adv 2017. [DOI: 10.1039/c6ra28102h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Laccase-catalyzed green reaction between catechols and 2-thioxopyrimidin-4-ones delivers novel pyrimidobenzothiazoles and catechol thioethers with antiproliferative activities against HepG2 cell line.
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Affiliation(s)
- H. T. Abdel-Mohsen
- Chemistry of Natural and Microbial Products Department
- Pharmaceutical Industries Research Division
- National Research Centre
- Cairo
- Egypt
| | - J. Conrad
- Bioorganische Chemie
- Institut für Chemie
- Universität Hohenheim
- Stuttgart
- Germany
| | - K. Harms
- Fachbereich Chemie
- Universität Marburg
- D-35032 Marburg
- Germany
| | - D. Nohr
- Institut für Biologische Chemie und Ernährungswissenschaft
- Universität Hohenheim
- Stuttgart
- Germany
| | - U. Beifuss
- Bioorganische Chemie
- Institut für Chemie
- Universität Hohenheim
- Stuttgart
- Germany
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15
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Shumakovich GP, Morozova O, Khlupova ME, Vasil'eva IS, Zaitseva EA, Yaropolov AI. Enhanced performance of a flexible supercapacitor due to a combination of the pseudocapacitances of both a PANI/MWCNT composite electrode and a gel polymer redox electrolyte. RSC Adv 2017. [DOI: 10.1039/c7ra04801g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A combination of the pseudocapacitances of both an enzymatically synthesized polyaniline/multi-walled carbon nanotube (PANI/MWCNT) composite and a gel polymer redox electrolyte was used to improve the specific characteristics of a supercapacitor.
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Affiliation(s)
- G. P. Shumakovich
- Bach Institute of Biochemistry
- Research Center of Biotechnology of the Russian Academy of Sciences
- 119071 Moscow
- Russia
| | - O. V. Morozova
- Bach Institute of Biochemistry
- Research Center of Biotechnology of the Russian Academy of Sciences
- 119071 Moscow
- Russia
| | - M. E. Khlupova
- Bach Institute of Biochemistry
- Research Center of Biotechnology of the Russian Academy of Sciences
- 119071 Moscow
- Russia
| | - I. S. Vasil'eva
- Bach Institute of Biochemistry
- Research Center of Biotechnology of the Russian Academy of Sciences
- 119071 Moscow
- Russia
| | - E. A. Zaitseva
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - A. I. Yaropolov
- Bach Institute of Biochemistry
- Research Center of Biotechnology of the Russian Academy of Sciences
- 119071 Moscow
- Russia
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16
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Qwebani-Ogunleye T, Kolesnikova NI, Steenkamp P, de Koning CB, Brady D, Wellington KW. A one-pot laccase-catalysed synthesis of coumestan derivatives and their anticancer activity. Bioorg Med Chem 2016; 25:1172-1182. [PMID: 28041801 DOI: 10.1016/j.bmc.2016.12.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/15/2016] [Accepted: 12/19/2016] [Indexed: 11/25/2022]
Abstract
Suberase®, a commercial laccase from Novozymes, was used to catalyse the synthesis of coumestans. The yields, in some cases, were similar to or better than that obtained by other enzymatic, chemical or electrochemical syntheses. The compounds were screened against renal TK10, melanoma UACC62 and breast MCF7 cancer cell-lines and the GI50, TGI and LC50 values determined. Anticancer screening showed that the cytostatic effects of the coumestans were most effective against the melanoma UACC62 and breast MCF7 cancer cell-lines exhibiting potent activities, GI50=5.35 and 7.96μM respectively. Moderate activity was obtained against the renal TK10 cancer cell-line. The total growth inhibition, based on the TGI values, of several of the compounds was better than that of etoposide against the melanoma UACC62 and the breast MCF7 cancer cell lines. Several compounds, based on the LC50 values, were also more lethal than etoposide against the same cancer cell lines. The SAR for the coumestans is similar against the melanoma UACC62 and breast MCF7 cell lines. The compound having potent activity against both breast MCF7 and melanoma UACC62 cell lines has a methyl group on the benzene ring (ring A) as well as on the catechol ring (ring B). Anticancer activity decreases when methoxy and halogen substituents are inserted on rings A and B.
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Affiliation(s)
| | | | - Paul Steenkamp
- CSIR Biosciences, PO Box 395, Pretoria, South Africa; Department of Biochemistry, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
| | - Charles B de Koning
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO Box, Wits 2050, South Africa
| | - Dean Brady
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO Box, Wits 2050, South Africa
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17
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Laccase catalysis for the synthesis of bioactive compounds. Appl Microbiol Biotechnol 2016; 101:13-33. [PMID: 27872999 DOI: 10.1007/s00253-016-7987-5] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/01/2016] [Accepted: 11/04/2016] [Indexed: 10/20/2022]
Abstract
The demand for compounds of therapeutic value is increasing mainly because of new applications of bioactive compounds in medicine, pharmaceutical, agricultural, and food industries. This has necessitated the search for cost-effective methods for producing bioactive compounds and therefore the intensification of the search for enzymatic approaches in organic synthesis. Laccase is one of the enzymes that have shown encouraging potential as biocatalysts in the synthesis of bioactive compounds. Laccases are multicopper oxidases with a diverse range of catalytic activities revolving around synthesis and degradative reactions. They have attracted much attention as potential industrial catalysts in organic synthesis mainly because they are essentially green catalysts with a diverse substrate range. Their reaction only requires molecular oxygen and releases water as the only by-product. Laccase catalysis involves the abstraction of a single electron from their substrates to produce reactive radicals. The free radicals subsequently undergo homo- and hetero-coupling to form dimeric, oligomeric, polymeric, or cross-coupling products which have practical implications in organic synthesis. Consequently, there is a growing body of research focused on the synthetic applications of laccases such as organic synthesis, hair and textile dyeing, polymer synthesis, and grafting processes. This paper reviews the major advances in laccase-mediated synthesis of bioactive compounds, the mechanisms of enzymatic coupling, structure-activity relationships of synthesized compounds, and the challenges that might guide future research directions.
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Enhanced Enzymatic Synthesis of a Cephalosporin, Cefadroclor, in the Presence of Organic Co-solvents. Appl Biochem Biotechnol 2016; 182:29-40. [DOI: 10.1007/s12010-016-2308-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 10/27/2016] [Indexed: 10/20/2022]
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Cannatelli MD, Ragauskas AJ. Two Decades of Laccases: Advancing Sustainability in the Chemical Industry. CHEM REC 2016; 17:122-140. [PMID: 27492131 DOI: 10.1002/tcr.201600033] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Indexed: 12/30/2022]
Abstract
Given the current state of environmental affairs and that our future on this planet as we know it is in jeopardy, research and development into greener and more sustainable technologies within the chemical and forest products industries is at its peak. Given the global scale of these industries, the need for environmentally benign practices is propelling new green processes. These challenges are also impacting academic research and our reagents of interest are laccases. These enzymes are employed in a variety of biotechnological applications due to their native function as catalytic oxidants. They are about as green as it gets when it comes to chemical processes, requiring O2 as their only co-substrate and producing H2 O as the sole by-product. The following account will review our twenty year journey on the use of these enzymes within our research group, from their initial use in biobleaching of kraft pulps and for fiber modification within the pulp and paper industry, to their current application as green catalytic oxidants in the field of synthetic organic chemistry.
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Affiliation(s)
- Mark D Cannatelli
- Renewable Bioproducts Institute, School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA.,Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
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- Renewable Bioproducts Institute, School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA.,Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.,Department of Chemical & Biomolecular Engineering, Department of Forestry, Wildlife & Fisheries, University of Tennessee, Knoxville, TN 37996, USA
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Ecofriendly syntheses of phenothiazones and related structures facilitated by laccase – a comparative study. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.07.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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