101
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Al-Shameri A, Petrich MC, Junge Puring K, Apfel UP, Nestl BM, Lauterbach L. Powering Artificial Enzymatic Cascades with Electrical Energy. Angew Chem Int Ed Engl 2020; 59:10929-10933. [PMID: 32202370 PMCID: PMC7318245 DOI: 10.1002/anie.202001302] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/06/2020] [Indexed: 11/08/2022]
Abstract
We have developed a scalable platform that employs electrolysis for an in vitro synthetic enzymatic cascade in a continuous flow reactor. Both H2 and O2 were produced by electrolysis and transferred through a gas-permeable membrane into the flow system. The membrane enabled the separation of the electrolyte from the biocatalysts in the flow system, where H2 and O2 served as electron mediators for the biocatalysts. We demonstrate the production of methylated N-heterocycles from diamines with up to 99 % product formation as well as excellent regioselective labeling with stable isotopes. Our platform can be applied for a broad panel of oxidoreductases to exploit electrical energy for the synthesis of fine chemicals.
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Affiliation(s)
- Ammar Al-Shameri
- Technical University of Berlin, Institute of Chemistry, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Marie-Christine Petrich
- Technical University of Berlin, Institute of Chemistry, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Kai Junge Puring
- Ruhr-University Bochum, Inorganic Chemistry, Universitaetsstrasse 150, 44780, Bochum, Germany.,Fraunhofer UMSICHT, Osterfelder Strasse 3, 46047, Oberhausen, Germany
| | - Ulf-Peter Apfel
- Ruhr-University Bochum, Inorganic Chemistry, Universitaetsstrasse 150, 44780, Bochum, Germany.,Fraunhofer UMSICHT, Osterfelder Strasse 3, 46047, Oberhausen, Germany
| | - Bettina M Nestl
- Universitaet Stuttgart, Institute of Biochemistry and Technical Biochemistry, Department of Technical Biochemistry, Allmandring 31, 70569, Stuttgart, Germany
| | - Lars Lauterbach
- Technical University of Berlin, Institute of Chemistry, Strasse des 17. Juni 135, 10623, Berlin, Germany
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102
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Engineered P450 BM3 and cpADH5 coupled cascade reaction for β-oxo fatty acid methyl ester production in whole cells. Enzyme Microb Technol 2020; 138:109555. [PMID: 32527525 DOI: 10.1016/j.enzmictec.2020.109555] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 03/23/2020] [Accepted: 03/24/2020] [Indexed: 01/01/2023]
Abstract
Hydroxy- or ketone- functionalized fatty acid methyl esters (FAMEs) are important compounds for production of pharmaceuticals, vitamins, cosmetics or dietary supplements. Biocatalysis through enzymatic cascades has drawn attention to the efficient, sustainable, and greener synthetic processes. Furthermore, whole cell catalysts offer important advantages such as cofactor regeneration by cell metabolism, omission of protein purification steps and increased enzyme stability. Here, we report the first whole cell catalysis employing an engineered P450 BM3 variant and cpADH5 coupled cascade reaction for the biosynthesis of hydroxy- and keto-FAMEs. Firstly, P450 BM3 was engineered through the KnowVolution approach yielding P450 BM3 variant YE_M1_2, (R47S/Y51W/T235S/N239R/I401 M) which exhibited boosted performance toward methyl hexanoate. The initial oxidation rate of YE_M1_2 toward methyl hexanoate was determined to be 23-fold higher than the wild type enzyme and a 1.5-fold increase in methyl 3-hydroxyhexanoate production was obtained (YE_M1_2; 2.75 mM and WT; 1.8 mM). Subsequently, the whole cell catalyst for the synthesis of methyl 3-hydroxyhexanoate and methyl 3-oxohexanoate was constructed by combining the engineered P450 BM3 and cpADH5 variants in an artificial operon. A 2.06 mM total product formation was achieved by the whole cell catalyst including co-expressed channel protein, FhuA and co-solvent addition. Moreover, the generated whole cell biocatalyst also accepted methyl valerate, methyl heptanoate as well as methyl octanoate as substrates and yielded ω-1 ketones as the main product.
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103
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Outer membrane vesicles catabolize lignin-derived aromatic compounds in Pseudomonas putida KT2440. Proc Natl Acad Sci U S A 2020; 117:9302-9310. [PMID: 32245809 DOI: 10.1073/pnas.1921073117] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Lignin is an abundant and recalcitrant component of plant cell walls. While lignin degradation in nature is typically attributed to fungi, growing evidence suggests that bacteria also catabolize this complex biopolymer. However, the spatiotemporal mechanisms for lignin catabolism remain unclear. Improved understanding of this biological process would aid in our collective knowledge of both carbon cycling and microbial strategies to valorize lignin to value-added compounds. Here, we examine lignin modifications and the exoproteome of three aromatic-catabolic bacteria: Pseudomonas putida KT2440, Rhodoccocus jostii RHA1, and Amycolatopsis sp. ATCC 39116. P. putida cultivation in lignin-rich media is characterized by an abundant exoproteome that is dynamically and selectively packaged into outer membrane vesicles (OMVs). Interestingly, many enzymes known to exhibit activity toward lignin-derived aromatic compounds are enriched in OMVs from early to late stationary phase, corresponding to the shift from bioavailable carbon to oligomeric lignin as a carbon source. In vivo and in vitro experiments demonstrate that enzymes contained in the OMVs are active and catabolize aromatic compounds. Taken together, this work supports OMV-mediated catabolism of lignin-derived aromatic compounds as an extracellular strategy for nutrient acquisition by soil bacteria and suggests that OMVs could potentially be useful tools for synthetic biology and biotechnological applications.
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104
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Biocatalysis in drug discovery and development. Curr Opin Chem Biol 2020; 55:151-160. [DOI: 10.1016/j.cbpa.2020.01.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 01/27/2020] [Indexed: 12/19/2022]
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105
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Robescu MS, Rubini R, Beneventi E, Tavanti M, Lonigro C, Zito F, Filippini F, Cendron L, Bergantino E. From the Amelioration of a NADP
+
‐dependent Formate Dehydrogenase to the Discovery of a New Enzyme: Round Trip from Theory to Practice. ChemCatChem 2020. [DOI: 10.1002/cctc.201902089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Marina Simona Robescu
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
| | - Rudy Rubini
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
| | - Elisa Beneventi
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
| | - Michele Tavanti
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
| | - Chiara Lonigro
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires UMR7099, CNRS, IBPC, Université Paris Diderot Sorbonne Paris Cité 13 rue Pierre et Marie Curie 75005 Paris France
| | - Francesca Zito
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires UMR7099, CNRS, IBPC, Université Paris Diderot Sorbonne Paris Cité 13 rue Pierre et Marie Curie 75005 Paris France
| | - Francesco Filippini
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
| | - Laura Cendron
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
| | - Elisabetta Bergantino
- Synthetic Biology and Biotechnology Unit Department of Biology University of Padova via U. Bassi 58B/viale G. Colombo 3 I-35131 Padova Italy
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106
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Huang L, Bittner JP, Domínguez de María P, Jakobtorweihen S, Kara S. Modeling Alcohol Dehydrogenase Catalysis in Deep Eutectic Solvent/Water Mixtures. Chembiochem 2020; 21:811-817. [PMID: 31605652 PMCID: PMC7154551 DOI: 10.1002/cbic.201900624] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Indexed: 11/17/2022]
Abstract
The use of oxidoreductases (EC1) in non-conventional reaction media has been increasingly explored. In particular, deep eutectic solvents (DESs) have emerged as a novel class of solvents. Herein, an in-depth study of bioreduction with an alcohol dehydrogenase (ADH) in the DES glyceline is presented. The activity and stability of ADH in mixtures of glyceline/water with varying water contents were measured. Furthermore, the thermodynamic water activity and viscosity of mixtures of glyceline/water have been determined. For a better understanding of the observations, molecular dynamics simulations were performed to quantify the molecular flexibility, hydration layer, and intraprotein hydrogen bonds of ADH. The behavior of the enzyme in DESs follows the classic dependence of water activity (aW ) in non-conventional media. At low aW values (<0.2), ADH does not show any activity; at higher aW values, the activity was still lower than that in pure water due to the high viscosities of the DES. These findings could be further explained by increased enzyme flexibility with increasing water content.
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Affiliation(s)
- Lei Huang
- Department of EngineeringBiocatalysis and Bioprocessing GroupAarhus UniversityGustav Wieds Vej 108000AarhusDenmark
| | - Jan Philipp Bittner
- Institute of Thermal Separation ProcessesHamburg University of TechnologyEißendorfer Strasse 3821073HamburgGermany
| | | | - Sven Jakobtorweihen
- Institute of Thermal Separation ProcessesHamburg University of TechnologyEißendorfer Strasse 3821073HamburgGermany
| | - Selin Kara
- Department of EngineeringBiocatalysis and Bioprocessing GroupAarhus UniversityGustav Wieds Vej 108000AarhusDenmark
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107
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Demkiv OM, Gayda GZ, Broda D, Gonchar MV. Extracellular laccase from Monilinia fructicola: isolation, primary characterization and application. Cell Biol Int 2020; 45:536-548. [PMID: 32052524 DOI: 10.1002/cbin.11316] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 02/02/2020] [Indexed: 01/16/2023]
Abstract
Laccases are enzymes belonging to the family of blue copper oxidases. Due to their broad substrate specificity, they are widely used in many industrial processes and environmental bioremediations for removal of a large number of pollutants. During last decades, laccases attracted scientific interest also as highly promising enzymes to be used in bioanalytics. The aim of this study is to obtain a highly purified laccase from an efficient fungal producer and to demonstrate the applicability of this enzyme for analytics and bioremediation. To select the best microbial source of laccase, a screening of fungal strains was carried out and the fungus Monilinia fructicola was chosen as a producer of an extracellular enzyme. Optimal cultivation conditions for the highest yield of laccase were established; the enzyme was purified by a column chromatography and partially characterized. Molecular mass of the laccase subunit was determined to be near 35 kDa; the optimal pH ranges for the highest activity and stability are 4.5-5.0 and 3.0-5.0, respectively; the optimal temperature for laccase activity is 30°C. Laccase preparation was successfully used as a biocatalyst in the amperometric biosensor for bisphenol A assay and in the bioreactor for bioremediation of some xenobiotics.
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Affiliation(s)
- Olga M Demkiv
- Institute of Cell Biology, National Academy of Sciences of Ukraine, 14/16 Drahomanov Str., 79005, Lviv, Ukraine
| | - Galina Z Gayda
- Institute of Cell Biology, National Academy of Sciences of Ukraine, 14/16 Drahomanov Str., 79005, Lviv, Ukraine
| | - Daniel Broda
- Faculty of Biotechnology, University of Rzeszów, 1 Pigonia Str., 35-310, Rzeszów, Poland
| | - Mykhailo V Gonchar
- Institute of Cell Biology, National Academy of Sciences of Ukraine, 14/16 Drahomanov Str., 79005, Lviv, Ukraine.,Drohobych Ivan Franko State Pedagogical University, 24 Ivan Franko Str., 82100, Drohobych, Ukraine
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108
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Removal of Diclofenac, Paracetamol, and Carbamazepine from Model Aqueous Solutions by Magnetic Sol-Gel Encapsulated Horseradish Peroxidase and Lignin Peroxidase Composites. NANOMATERIALS 2020; 10:nano10020282. [PMID: 32046049 PMCID: PMC7075194 DOI: 10.3390/nano10020282] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 01/28/2020] [Accepted: 02/01/2020] [Indexed: 01/20/2023]
Abstract
Sustainable and green synthesis of nanocomposites for degradation of pharmaceuticals was developed via immobilization and stabilization of the biological strong oxidizing agents, peroxidase enzymes, on a solid support. Sol–gel encapsulated enzyme composites were characterized using electron microscopy (TEM, SEM), atomic force microscopy, FTIR spectroscopy, and thermogravimetric analysis. Horseradish peroxidase (HRP) and lignin peroxidase (LiP) were adsorbed onto magnetite nanoparticles and sol–gel encapsulated in a surface silica layer. Encapsulation enhanced the stability of the biocatalysts over time and thermal stability. The biocatalysts showed appreciable selectivity in oxidation of the organic drinking water pollutants diclofenac, carbamazepine, and paracetamol with improved activity being pharmaceutical specific for each enzyme. In particular, sol–gel encapsulated LiP- and HRP-based nanocomposites were active over 20 consecutive cycles for 20 days at 55 °C (24 h/cycle). The stability of the sol–gel encapsulated catalysts in acidic medium was also improved compared to native enzymes. Carbamazepine and diclofenac were degraded to 68% and 64% by sol–gel LiP composites respectively at pH 5 under elevated temperature. Total destruction of carbamazepine and diclofenac was achieved at pH 3 (55 °C) within 3 days, in the case of both immobilized HRP and LiP. Using NMR spectroscopy, characterization of the drug decomposition products, and decomposition pathways by the peroxidase enzymes suggested.
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109
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Mathieu Y, Offen WA, Forget SM, Ciano L, Viborg AH, Blagova E, Henrissat B, Walton PH, Davies GJ, Brumer H. Discovery of a Fungal Copper Radical Oxidase with High Catalytic Efficiency toward 5-Hydroxymethylfurfural and Benzyl Alcohols for Bioprocessing. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04727] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yann Mathieu
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Wendy A. Offen
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Stephanie M. Forget
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Luisa Ciano
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Alexander Holm Viborg
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Elena Blagova
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Bernard Henrissat
- Architecture et Fonction des Macromolécules Biologiques (AFMB), CNRS, Aix-Marseille University, Marseille, 13288, France
- INRA, USC1408 Architecture et Fonction des Macromolécules Biologiques (AFMB), Marseille, 13288, France
| | - Paul H. Walton
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Gideon J. Davies
- Department of Chemistry, University of York, Heslington, YO10 5DD, York, U.K
| | - Harry Brumer
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
- Department of Botany, University of British Columbia, 3200 University Boulevard, Vancouver, British Columbia V6T 1Z4, Canada
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110
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Vera M, Nyanhongo GS, Guebitz GM, Rivas BL. Polymeric microspheres as support to co-immobilized Agaricus bisporus and Trametes versicolor laccases and their application in diazinon degradation. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2019.07.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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111
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Fungal Peroxygenases: A Phylogenetically Old Superfamily of Heme Enzymes with Promiscuity for Oxygen Transfer Reactions. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/978-3-030-29541-7_14] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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112
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Chai TT, Xiao J, Dass SM, Wong FC. Laccase-catalyzed, Phytochemical-mediated Protein Crosslinking Conjugates. EFOOD 2020. [DOI: 10.2991/efood.k.200218.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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113
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Black WB, Zhang L, Mak WS, Maxel S, Cui Y, King E, Fong B, Sanchez Martinez A, Siegel JB, Li H. Engineering a nicotinamide mononucleotide redox cofactor system for biocatalysis. Nat Chem Biol 2020; 16:87-94. [PMID: 31768035 PMCID: PMC7546441 DOI: 10.1038/s41589-019-0402-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 10/07/2019] [Indexed: 01/29/2023]
Abstract
Biological production of chemicals often requires the use of cellular cofactors, such as nicotinamide adenine dinucleotide phosphate (NADP+). These cofactors are expensive to use in vitro and difficult to control in vivo. We demonstrate the development of a noncanonical redox cofactor system based on nicotinamide mononucleotide (NMN+). The key enzyme in the system is a computationally designed glucose dehydrogenase with a 107-fold cofactor specificity switch toward NMN+ over NADP+ based on apparent enzymatic activity. We demonstrate that this system can be used to support diverse redox chemistries in vitro with high total turnover number (~39,000), to channel reducing power in Escherichia coli whole cells specifically from glucose to a pharmaceutical intermediate, levodione, and to sustain the high metabolic flux required for the central carbon metabolism to support growth. Overall, this work demonstrates efficient use of a noncanonical cofactor in biocatalysis and metabolic pathway design.
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Affiliation(s)
- William B Black
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, USA
| | - Linyue Zhang
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, USA
| | - Wai Shun Mak
- Department of Chemistry, University of California, Davis, Davis, CA, USA
- Genome Center, University of California, Davis, Davis, CA, USA
| | - Sarah Maxel
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, USA
| | - Youtian Cui
- Department of Chemistry, University of California, Davis, Davis, CA, USA
- Genome Center, University of California, Davis, Davis, CA, USA
| | - Edward King
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, USA
| | - Bonnie Fong
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, USA
| | - Alicia Sanchez Martinez
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, USA
| | - Justin B Siegel
- Department of Chemistry, University of California, Davis, Davis, CA, USA.
- Genome Center, University of California, Davis, Davis, CA, USA.
- Department of Biochemistry and Molecular Medicine, University of California, Davis, Davis, CA, USA.
| | - Han Li
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, USA.
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114
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Stanzione I, Pezzella C, Giardina P, Sannia G, Piscitelli A. Beyond natural laccases: extension of their potential applications by protein engineering. Appl Microbiol Biotechnol 2019; 104:915-924. [DOI: 10.1007/s00253-019-10147-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/06/2019] [Accepted: 09/17/2019] [Indexed: 11/28/2022]
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115
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Fabara AN, Fraaije MW. An overview of microbial indigo-forming enzymes. Appl Microbiol Biotechnol 2019; 104:925-933. [PMID: 31834440 PMCID: PMC6962290 DOI: 10.1007/s00253-019-10292-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/23/2019] [Accepted: 11/28/2019] [Indexed: 11/03/2022]
Abstract
Indigo is one of the oldest textile dyes and was originally prepared from plant material. Nowadays, indigo is chemically synthesized at a large scale to satisfy the demand for dyeing jeans. The current indigo production processes are based on fossil feedstocks; therefore, it is highly attractive to develop a more sustainable and environmentally friendly biotechnological process for the production of this popular dye. In the past decades, a number of natural and engineered enzymes have been identified that can be used for the synthesis of indigo. This mini-review provides an overview of the various microbial enzymes which are able to produce indigo and discusses the advantages and disadvantages of each biocatalytic system.
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Affiliation(s)
- Andrea N Fabara
- Molecular Enzymology group, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Marco W Fraaije
- Molecular Enzymology group, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
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116
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Asymmetric redox-neutral radical cyclization catalysed by flavin-dependent 'ene'-reductases. Nat Chem 2019; 12:71-75. [PMID: 31792387 PMCID: PMC6925616 DOI: 10.1038/s41557-019-0370-2] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 10/07/2019] [Indexed: 01/08/2023]
Abstract
Flavin-dependent 'ene'-reductases (EREDs) are exquisite catalysts for effecting stereoselective reductions. Although these reactions typically proceed through a hydride transfer mechanism, we recently found that EREDs can also catalyse reductive dehalogenations and cyclizations via single electron transfer mechanisms. Here, we demonstrate that these enzymes can catalyse redox-neutral radical cyclizations to produce enantioenriched oxindoles from α-haloamides. This transformation is a C-C bond-forming reaction currently unknown in nature and one for which there are no catalytic asymmetric examples. Mechanistic studies indicate the reaction proceeds via the flavin semiquinone/quinone redox couple, where ground-state flavin semiquinone provides the electron for substrate reduction and flavin quinone oxidizes the vinylogous α-amido radical formed after cyclization. This mechanistic manifold was previously unknown for this enzyme family, highlighting the versatility of EREDs in asymmetric synthesis.
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117
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Sinha R, Shukla P. Current Trends in Protein Engineering: Updates and Progress. Curr Protein Pept Sci 2019; 20:398-407. [PMID: 30451109 DOI: 10.2174/1389203720666181119120120] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/09/2018] [Accepted: 11/12/2018] [Indexed: 12/15/2022]
Abstract
Proteins are one of the most important and resourceful biomolecules that find applications in health, industry, medicine, research, and biotechnology. Given its tremendous relevance, protein engineering has emerged as significant biotechnological intervention in this area. Strategic utilization of protein engineering methods and approaches has enabled better enzymatic properties, better stability, increased catalytic activity and most importantly, interesting and wide range applicability of proteins. In fact, the commercialization of engineered proteins have manifested in economically beneficial and viable solutions for industry and healthcare sector. Protein engineering has also evolved to become a powerful tool contributing significantly to the developments in both synthetic biology and metabolic engineering. The present review revisits the current trends in protein engineering approaches such as rational design, directed evolution, de novo design, computational approaches etc. and encompasses the recent progresses made in this field over the last few years. The review also throws light on advanced or futuristic protein engineering aspects, which are being explored for design and development of novel proteins with improved properties or advanced applications.
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Affiliation(s)
| | - Pratyoosh Shukla
- Enzyme Technology and Protein Bioinformatics Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak-124001, Haryana, India
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118
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Megarity CF, Siritanaratkul B, Cheng B, Morello G, Wan L, Sills AJ, Heath RS, Turner NJ, Armstrong FA. Electrified Nanoconfined Biocatalysis with Rapid Cofactor Recycling. ChemCatChem 2019. [DOI: 10.1002/cctc.201901245] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Clare F. Megarity
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QR UK
| | | | - Beichen Cheng
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QR UK
| | - Giorgio Morello
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QR UK
| | - Lei Wan
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QR UK
| | - Adam J. Sills
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QR UK
| | - Rachel S. Heath
- School of ChemistryManchester Institute of BiotechnologyUniversity of Manchester 131 Princess Street Manchester M1 7DN UK
| | - Nicholas J. Turner
- School of ChemistryManchester Institute of BiotechnologyUniversity of Manchester 131 Princess Street Manchester M1 7DN UK
| | - Fraser A. Armstrong
- Department of ChemistryUniversity of Oxford South Parks Road Oxford OX1 3QR UK
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Sánchez-Alejandro F, Baratto MC, Basosi R, Graeve O, Vazquez-Duhalt R. Addition of new catalytic sites on the surface of versatile peroxidase for enhancement of LRET catalysis. Enzyme Microb Technol 2019; 131:109429. [PMID: 31615668 DOI: 10.1016/j.enzmictec.2019.109429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/21/2019] [Accepted: 09/10/2019] [Indexed: 11/19/2022]
Abstract
Versatile peroxidase (VP) from Bjerkandera adusta is an enzyme able to oxidize bulky and high-redox substrates trough a Long-Range Electron Transfer (LRET) pathway. In this study, the introduction of radical-forming aromatic amino acids by chemical modification of the protein surface was performed, and the catalytic implications of these additional surface active-sites on the oxidation of 2,6-dimethylphenol, Mn2+ and Remazol Brilliant Blue R (RBBR) were determined. These three different substrates are oxidized in different active-sites of enzyme molecule, of which the high redox RBBR the only one that is transformed by an external radical formed on the protein surface. Both catalytic constants kcat and KM were significantly affected by the chemical modifications. Tryptophan- and tyrosine-modified VP showed higher catalytic transformation than the unmodified enzyme for RBBR, while the Mn2+ oxidation was significantly reduced by all chemical modifications. Electron Paramagnetic Resonance studies demonstrated the formation of additional protein-based radicals after the chemical modification with radical-forming amino acids. In addition, the catalytic rate of the LRET-mediated transformation showed a good correlation with the ionization energy of the additional amino acid on the protein surface.
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Affiliation(s)
- Flor Sánchez-Alejandro
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Baja California, Mexico
| | - Maria Camilla Baratto
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Riccardo Basosi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Olivia Graeve
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA, USA
| | - Rafael Vazquez-Duhalt
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Baja California, Mexico.
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120
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Min K, Park GW, Yoo YJ, Lee JS. A perspective on the biotechnological applications of the versatile tyrosinase. BIORESOURCE TECHNOLOGY 2019; 289:121730. [PMID: 31279520 DOI: 10.1016/j.biortech.2019.121730] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 06/09/2023]
Abstract
Tyrosinase (E.C. 1.14.18. 1) is a type of Cu-containing oxidoreductase which has bifunctional activity for various phenolic substrates: ortho-hydroxylation of monophenols to diphenols (a cresolase activity) and oxidation of diphenols to quinones (a catecholase activity). Based on the broad substrate spectrum, tyrosinase has been used in bioremediation of phenolic pollutants, constructing biosensors for identifying phenolic compounds, and L-DOPA synthesis. Furthermore, not only tyrosinase has been used to produce useful polyphenol derivatives, but also it is recently revealed that the promiscuous activity of tyrosinase is closely related with delignification in the biorefinery. Accordingly, tyrosinase might be a potential biocatalyst for industrial applications (e.g., electroenzymatic L-DOPA production, but its long-term stability and reusability should be further explored. In this review, we emphasize the versatility of tyrosinase, which includes conventional applications, and suggest new perspectives as an industrial biocatalyst (e.g., electroenzymatic L-DOPA production). Especially, this review focuses on and comprehensively discusses recent innovative studies.
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Affiliation(s)
- Kyoungseon Min
- Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Gwon Woo Park
- Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Young Je Yoo
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Jin-Suk Lee
- Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea.
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121
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Schmitz LM, Rosenthal K, Lütz S. Recent advances in heme biocatalysis engineering. Biotechnol Bioeng 2019; 116:3469-3475. [PMID: 31483477 DOI: 10.1002/bit.27156] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 07/17/2019] [Accepted: 08/29/2019] [Indexed: 01/13/2023]
Abstract
Heme enzymes have the potential to be widely used as biocatalysts due to their capability to perform a vast variety of oxidation reactions. In spite of their versatility, the application of heme enzymes was long time-limited for the industry due to their low activity and stability in large scale processes. The identification of novel natural biocatalysts and recent advances in protein engineering have led to new reactions with a high application potential. The latest creation of a serine-ligated mutant of BM3 showed an efficient transfer of reactive carbenes into C═C bonds of olefins reaching total turnover numbers of more than 60,000 and product titers of up to 27 g/L-1 . This prominent example shows that heme enzymes are becoming competitive to chemical syntheses while being already advantageous in terms of high yield, regioselectivity, stereoselectivity and environmentally friendly reaction conditions. Advances in reactor concepts and the influencing parameters on reaction performance are also under investigation resulting in improved productivities and increased stability of the heme biocatalytic systems. In this mini review, we briefly present the latest advancements in the field of heme enzymes towards increased reaction scope and applicability.
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Affiliation(s)
- Lisa Marie Schmitz
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Dortmund, Germany
| | - Katrin Rosenthal
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Dortmund, Germany
| | - Stephan Lütz
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Dortmund, Germany
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Tikhonov BB, Sulman EM, Stadol’nikova PY, Sulman AM, Golikova EP, Sidorov AI, Matveeva VG. Immobilized Enzymes from the Class of Oxidoreductases in Technological Processes: A Review. CATALYSIS IN INDUSTRY 2019. [DOI: 10.1134/s2070050419030115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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123
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Plant Fibers and Phenolics: A Review on Their Synthesis, Analysis and Combined Use for Biomaterials with New Properties. FIBERS 2019. [DOI: 10.3390/fib7090080] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Devising environmental-friendly processes in biotechnology is a priority in the current economic scenario. We are witnessing a constant and steady push towards finding sustainable solutions to societal challenges by promoting innovation-driven activities minimizing the environmental impact and valorizing natural resources. In bioeconomy, plants are among the most important renewable sources of both fibers (woody and cellulosic) and phytochemicals, which find applications in many industrial sectors, spanning from the textile, to the biocomposite, medical, nutraceutical, and pharma sectors. Given the key role of plants as natural sources of (macro)molecules, we here provide a compendium on the use of plant fibers functionalized/impregnated with phytochemicals (in particular phenolic extracts). The goal is to review the various applications of natural fibers functionalized with plant phenolics and to valorize those plants that are source of both fibers and phytochemicals.
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Bains A, Perez-Garcia O, Lear G, Greenwood D, Swift S, Middleditch M, Kolodziej EP, Singhal N. Induction of Microbial Oxidative Stress as a New Strategy to Enhance the Enzymatic Degradation of Organic Micropollutants in Synthetic Wastewater. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:9553-9563. [PMID: 31356060 DOI: 10.1021/acs.est.9b02219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Organic micropollutants (OMPs) are pervasive anthropogenic contaminants of receiving waters where they can induce various adverse effects to aquatic life. Their ubiquitous environmental occurrence is primarily attributed to discharge from wastewater treatment plants due to incomplete removal by common biological wastewater treatment processes. Here, we assess a new strategy for promoting the degradation of six representative OMPs (i.e., sulfamethoxazole, carbamazepine, tylosin, atrazine, naproxen, and ibuprofen) by intentionally stimulating the production of microbial oxidoreductases to counter oxidative stress caused by oxygen perturbations. Mixed microbial cultures from a dairy farm wastewater were subjected to cyclic perturbations of dissolved oxygen (DO). A distance-based redundancy analysis was used to show that DO perturbations correlate with the abundance of Pseudomonadaceae and Rhodocyclaceae families, activities of peroxidases and cytochromes, and the degradation of OMPs. DO perturbation of 0.25 and 0.5 cycles/h led to most abundance of Pseudomonadaceae and Rhodocyclaceae families, showed higher activity of peroxidase and cytochrome, and gave largest removal of OMPs (removal of 92 ± 3% for sulfamethoxazole, 84 ± 3% for naproxen, 82 ± 3% for ibuprofen, 66 ± 2% for carbamazepine, 57 ± 15% for tylosin, and 88 ± 1% for atrazine).
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Affiliation(s)
- Amrita Bains
- Department of Civil and Environmental Engineering , University of Auckland , Auckland 1142 , New Zealand
| | - Octavio Perez-Garcia
- Department of Civil and Environmental Engineering , University of Auckland , Auckland 1142 , New Zealand
| | - Gavin Lear
- School of Biological Sciences , University of Auckland , Auckland 1142 , New Zealand
| | - David Greenwood
- School of Biological Sciences , University of Auckland , Auckland 1142 , New Zealand
| | - Simon Swift
- Faculty of Medical and Health Sciences , University of Auckland , Auckland 1142 , New Zealand
| | - Martin Middleditch
- School of Biological Sciences , University of Auckland , Auckland 1142 , New Zealand
| | - Edward P Kolodziej
- Division of Sciences and Mathematics , University of Washington-Tacoma , Tacoma , Washington 98402 , United States
- Department of Civil & Environmental Engineering , University of Washington , Seattle , Washington 98195-2700 , United States
- Center for Urban Waters , Tacoma , Washington 98421 , United States
| | - Naresh Singhal
- Department of Civil and Environmental Engineering , University of Auckland , Auckland 1142 , New Zealand
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125
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Lin YW. Rational Design of Artificial Metalloproteins and Metalloenzymes with Metal Clusters. Molecules 2019; 24:E2743. [PMID: 31362341 PMCID: PMC6696605 DOI: 10.3390/molecules24152743] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/24/2019] [Accepted: 07/26/2019] [Indexed: 01/22/2023] Open
Abstract
Metalloproteins and metalloenzymes play important roles in biological systems by using the limited metal ions, complexes, and clusters that are associated with the protein matrix. The design of artificial metalloproteins and metalloenzymes not only reveals the structure and function relationship of natural proteins, but also enables the synthesis of artificial proteins and enzymes with improved properties and functions. Acknowledging the progress in rational design from single to multiple active sites, this review focuses on recent achievements in the design of artificial metalloproteins and metalloenzymes with metal clusters, including zinc clusters, cadmium clusters, iron-sulfur clusters, and copper-sulfur clusters, as well as noble metal clusters and others. These metal clusters were designed in both native and de novo protein scaffolds for structural roles, electron transfer, or catalysis. Some synthetic metal clusters as functional models of native enzymes are also discussed. These achievements provide valuable insights for deep understanding of the natural proteins and enzymes, and practical clues for the further design of artificial enzymes with functions comparable or even beyond those of natural counterparts.
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Affiliation(s)
- Ying-Wu Lin
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China.
- Laboratory of Protein Structure and Function, University of South China, Hengyang 421001, China.
- Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China.
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126
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Dias Gomes M, Moiseyenko RP, Baum A, Jørgensen TM, Woodley JM. Use of image analysis to understand enzyme stability in an aerated stirred reactor. Biotechnol Prog 2019; 35:e2878. [DOI: 10.1002/btpr.2878] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Mafalda Dias Gomes
- Department of Chemical and Biochemical EngineeringTechnical University of Denmark Lyngby Denmark
| | - Rayisa P. Moiseyenko
- Statistics and Data Analysis, Department of Applied Mathematics and Computer ScienceTechnical University of Denmark Lyngby Denmark
| | - Andreas Baum
- Statistics and Data Analysis, Department of Applied Mathematics and Computer ScienceTechnical University of Denmark Lyngby Denmark
| | - Thomas M. Jørgensen
- Statistics and Data Analysis, Department of Applied Mathematics and Computer ScienceTechnical University of Denmark Lyngby Denmark
| | - John M. Woodley
- Department of Chemical and Biochemical EngineeringTechnical University of Denmark Lyngby Denmark
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van Schie MMCH, Zhang W, Tieves F, Choi DS, Park CB, Burek BO, Bloh JZ, Arends IWCE, Paul CE, Alcalde M, Hollmann F. Cascading g-C3N4 and Peroxygenases for Selective Oxyfunctionalization Reactions. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01341] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Morten M. C. H. van Schie
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Wuyuan Zhang
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Florian Tieves
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Da Som Choi
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
| | - Chan Beum Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
| | - Bastien O. Burek
- DECHEMA Forschungsinstitut, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany
| | - Jonathan Z. Bloh
- DECHEMA Forschungsinstitut, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany
| | - Isabel W. C. E. Arends
- University of Utrecht, Faculty of Science, Budapestlaan 6, 3584 CD Utrecht, The Netherlands
| | - Caroline E. Paul
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Miguel Alcalde
- Department of Biocatalysis, Institute of Catalysis, CSIC, 28049 Madrid, Spain
| | - Frank Hollmann
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
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128
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Valadares F, Gonçalves TA, Damasio A, Milagres AM, Squina FM, Segato F, Ferraz A. The secretome of two representative lignocellulose-decay basidiomycetes growing on sugarcane bagasse solid-state cultures. Enzyme Microb Technol 2019; 130:109370. [PMID: 31421724 DOI: 10.1016/j.enzmictec.2019.109370] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 06/27/2019] [Accepted: 07/02/2019] [Indexed: 12/14/2022]
Abstract
Secretome evaluations of lignocellulose-decay basidiomycetes can reveal new enzymes in selected fungal species that degrade specific substrates. Proteins discovered in such studies can support biorefinery development. Brown-rot (Gloeophyllum trabeum) and white-rot (Pleurotus ostreatus) fungi growing in sugarcane bagasse solid-state cultures produced 119 and 63 different extracellular proteins, respectively. Several of the identified enzymes are suitable for in vitro biomass conversion, including a range of cellulases (endoglucanases, cellobiohydrolases and β-glucosidases), hemicellulases (endoxylanases, α-arabinofuranosidases, α-glucuronidases and acetylxylan esterases) and carbohydrate-active auxiliary proteins, such as AA9 lytic polysaccharide monooxygenase, AA1 laccase and AA2 versatile peroxidase. Extracellular oxalate decarboxylase was also detected in both fungal species, exclusively in media containing sugarcane bagasse. Interestingly, intracellular AA6 quinone oxidoreductases were also exclusively produced under sugarcane bagasse induction in both fungi. These enzymes promote quinone redox cycling, which is used to produce Fenton's reagents by lignocellulose-decay fungi. Hitherto undiscovered hypothetical proteins that are predicted in lignocellulose-decay fungi genomes appeared in high relative abundance in the cultures containing sugarcane bagasse, which suggests undisclosed, new biochemical mechanisms that are used by lignocellulose-decay fungi to degrade sugarcane biomass. In general, lignocellulose-decay fungi produce a number of canonical hydrolases, as well as some newly observed enzymes, that are suitable for in vitro biomass digestion in a biorefinery context.
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Affiliation(s)
- Fernanda Valadares
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, 12602-810, Lorena, SP, Brazil
| | - Thiago A Gonçalves
- Programa de Processos Tecnológicos e Ambientais, Universidade de Sorocaba, 18023-000 Sorocaba, SP, Brazil; Institute of Biology, University of Campinas (UNICAMP), 13080-655, Campinas, SP, Brazil
| | - André Damasio
- Institute of Biology, University of Campinas (UNICAMP), 13080-655, Campinas, SP, Brazil
| | - Adriane Mf Milagres
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, 12602-810, Lorena, SP, Brazil
| | - Fabio M Squina
- Programa de Processos Tecnológicos e Ambientais, Universidade de Sorocaba, 18023-000 Sorocaba, SP, Brazil
| | - Fernando Segato
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, 12602-810, Lorena, SP, Brazil
| | - André Ferraz
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, 12602-810, Lorena, SP, Brazil.
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129
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Lin Y. Rational design of heme enzymes for biodegradation of pollutants toward a green future. Biotechnol Appl Biochem 2019; 67:484-494. [DOI: 10.1002/bab.1788] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/06/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Ying‐Wu Lin
- School of Chemistry and Chemical Engineering University of South China Hengyang People's Republic of China
- Laboratory of Protein Structure and Function University of South China Hengyang People's Republic of China
- Hunan Key Laboratory for the Design and Application of Actinide Complexes University of South China Hengyang People's Republic of China
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130
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Pesic M, Willot SJP, Fernández-Fueyo E, Tieves F, Alcalde M, Hollmann F. Multienzymatic in situ hydrogen peroxide generation cascade for peroxygenase-catalysed oxyfunctionalisation reactions. ACTA ACUST UNITED AC 2019; 74:101-104. [PMID: 30379645 DOI: 10.1515/znc-2018-0137] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 10/04/2018] [Indexed: 01/02/2023]
Abstract
There is an increasing interest in the application of peroxygenases in biocatalysis, because of their ability to catalyse the oxyfunctionalisation reaction in a stereoselective fashion and with high catalytic efficiencies, while using hydrogen peroxide or organic peroxides as oxidant. However, enzymes belonging to this class exhibit a very low stability in the presence of peroxides. With the aim of bypassing this fast and irreversible inactivation, we study the use of a gradual supply of hydrogen peroxide to maintain its concentration at stoichiometric levels. In this contribution, we report a multienzymatic cascade for in situ generation of hydrogen peroxide. In the first step, in the presence of NAD+ cofactor, formate dehydrogenase from Candida boidinii (FDH) catalysed the oxidation of formate yielding CO2. Reduced NADH was reoxidised by the reduction of the flavin mononucleotide cofactor bound to an old yellow enzyme homologue from Bacillus subtilis (YqjM), which subsequently reacts with molecular oxygen yielding hydrogen peroxide. Finally, this system was coupled to the hydroxylation of ethylbenzene reaction catalysed by an evolved peroxygenase from Agrocybe aegerita (rAaeUPO). Additionally, we studied the influence of different reaction parameters on the performance of the cascade with the aim of improving the turnover of the hydroxylation reaction.
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Affiliation(s)
- Milja Pesic
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Sébastien Jean-Paul Willot
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Elena Fernández-Fueyo
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Florian Tieves
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Miguel Alcalde
- Department of Biocatalysis, Institute of Catalysis, CSIC, 28049 Madrid, Spain
| | - Frank Hollmann
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands
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Burek BO, de Boer SR, Tieves F, Zhang W, van Schie M, Bormann S, Alcalde M, Holtmann D, Hollmann F, Bahnemann DW, Bloh JZ. Photoenzymatic Hydroxylation of Ethylbenzene Catalyzed by Unspecific Peroxygenase: Origin of Enzyme Inactivation and the Impact of Light Intensity and Temperature. ChemCatChem 2019. [DOI: 10.1002/cctc.201900610] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Bastien O. Burek
- Chemical Technology Group and Industrial Biotechnology GroupDECHEMA Forschungsinstitut Theodor-Heuss-Allee 25 60486 Frankfurt am Main Germany
- Institut für Technische ChemieLeibniz Universität Hannover Callinstraße 3 30167 Hannover Germany
| | - Sabrina R. de Boer
- Chemical Technology Group and Industrial Biotechnology GroupDECHEMA Forschungsinstitut Theodor-Heuss-Allee 25 60486 Frankfurt am Main Germany
| | - Florian Tieves
- Department of BiotechnologyDelft University of Technology Van der Maasweg 9 2629HZ Delft (The Netherlands
| | - Wuyuan Zhang
- Department of BiotechnologyDelft University of Technology Van der Maasweg 9 2629HZ Delft (The Netherlands
| | - Morten van Schie
- Department of BiotechnologyDelft University of Technology Van der Maasweg 9 2629HZ Delft (The Netherlands
| | - Sebastian Bormann
- Chemical Technology Group and Industrial Biotechnology GroupDECHEMA Forschungsinstitut Theodor-Heuss-Allee 25 60486 Frankfurt am Main Germany
| | - Miguel Alcalde
- Department of BiocatalysisInstitute of Catalysis, CSIC 28049 Madrid Spain
| | - Dirk Holtmann
- Chemical Technology Group and Industrial Biotechnology GroupDECHEMA Forschungsinstitut Theodor-Heuss-Allee 25 60486 Frankfurt am Main Germany
| | - Frank Hollmann
- Department of BiotechnologyDelft University of Technology Van der Maasweg 9 2629HZ Delft (The Netherlands
| | - Detlef W. Bahnemann
- Institut für Technische ChemieLeibniz Universität Hannover Callinstraße 3 30167 Hannover Germany
- Laboratory “Photoactive Nanocomposite Materials”Saint-Petersburg State University Ulyanovskaya str. 1, Peterhof Saint-Petersburg 198504 Russia
| | - Jonathan Z. Bloh
- Chemical Technology Group and Industrial Biotechnology GroupDECHEMA Forschungsinstitut Theodor-Heuss-Allee 25 60486 Frankfurt am Main Germany
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Alessa AHA, Tee KL, Gonzalez-Perez D, Omar Ali HEM, Evans CA, Trevaskis A, Xu JH, Wong TS. Accelerated directed evolution of dye-decolorizing peroxidase using a bacterial extracellular protein secretion system (BENNY). BIORESOUR BIOPROCESS 2019; 6:20. [PMID: 31231605 PMCID: PMC6544594 DOI: 10.1186/s40643-019-0255-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 05/20/2019] [Indexed: 01/19/2023] Open
Abstract
Background Dye-decolorizing peroxidases (DyPs) are haem-containing peroxidases that show great promises in industrial biocatalysis and lignocellulosic degradation. Through the use of Escherichia coli osmotically-inducible protein Y (OsmY) as a bacterial extracellular protein secretion system (BENNY), we successfully developed a streamlined directed evolution workflow to accelerate the protein engineering of DyP4 from Pleurotus ostreatus strain PC15. Result After 3 rounds of random mutagenesis with error-prone polymerase chain reaction (epPCR) and 1 round of saturation mutagenesis, we obtained 4D4 variant (I56V, K109R, N227S and N312S) that displays multiple desirable phenotypes, including higher protein yield and secretion, higher specific activity (2.7-fold improvement in kcat/Km) and higher H2O2 tolerance (sevenfold improvement based on IC50). Conclusion To our best knowledge, this is the first report of applying OsmY to simplify the directed evolution workflow and to direct the extracellular secretion of a haem protein such as DyP4.![]() Electronic supplementary material The online version of this article (10.1186/s40643-019-0255-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Abdulrahman H A Alessa
- 1Department of Chemical & Biological Engineering and Advanced Biomanufacturing Centre, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD UK
| | - Kang Lan Tee
- 1Department of Chemical & Biological Engineering and Advanced Biomanufacturing Centre, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD UK
| | - David Gonzalez-Perez
- 1Department of Chemical & Biological Engineering and Advanced Biomanufacturing Centre, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD UK
| | - Hossam E M Omar Ali
- 1Department of Chemical & Biological Engineering and Advanced Biomanufacturing Centre, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD UK
| | - Caroline A Evans
- 1Department of Chemical & Biological Engineering and Advanced Biomanufacturing Centre, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD UK
| | - Alex Trevaskis
- 1Department of Chemical & Biological Engineering and Advanced Biomanufacturing Centre, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD UK
| | - Jian-He Xu
- 2Laboratory of Biocatalysis and Bioprocessing, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237 People's Republic of China
| | - Tuck Seng Wong
- 1Department of Chemical & Biological Engineering and Advanced Biomanufacturing Centre, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD UK
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133
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Sützl L, Foley G, Gillam EMJ, Bodén M, Haltrich D. The GMC superfamily of oxidoreductases revisited: analysis and evolution of fungal GMC oxidoreductases. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:118. [PMID: 31168323 PMCID: PMC6509819 DOI: 10.1186/s13068-019-1457-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 05/02/2019] [Indexed: 05/03/2023]
Abstract
BACKGROUND The glucose-methanol-choline (GMC) superfamily is a large and functionally diverse family of oxidoreductases that share a common structural fold. Fungal members of this superfamily that are characterised and relevant for lignocellulose degradation include aryl-alcohol oxidoreductase, alcohol oxidase, cellobiose dehydrogenase, glucose oxidase, glucose dehydrogenase, pyranose dehydrogenase, and pyranose oxidase, which together form family AA3 of the auxiliary activities in the CAZy database of carbohydrate-active enzymes. Overall, little is known about the extant sequence space of these GMC oxidoreductases and their phylogenetic relations. Although some individual forms are well characterised, it is still unclear how they compare in respect of the complete enzyme class and, therefore, also how generalizable are their characteristics. RESULTS To improve the understanding of the GMC superfamily as a whole, we used sequence similarity networks to cluster large numbers of fungal GMC sequences and annotate them according to functionality. Subsequently, different members of the GMC superfamily were analysed in detail with regard to their sequences and phylogeny. This allowed us to define the currently characterised sequence space and show that complete clades of some enzymes have not been studied in any detail to date. Finally, we interpret our results from an evolutionary perspective, where we could show, for example, that pyranose dehydrogenase evolved from aryl-alcohol oxidoreductase after a change in substrate specificity and that the cytochrome domain of cellobiose dehydrogenase was regularly lost during evolution. CONCLUSIONS This study offers new insights into the sequence variation and phylogenetic relationships of fungal GMC/AA3 sequences. Certain clades of these GMC enzymes identified in our phylogenetic analyses are completely uncharacterised to date, and might include enzyme activities of varying specificities and/or activities that are hitherto unstudied.
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Affiliation(s)
- Leander Sützl
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Vienna, Austria
- Doctoral Programme BioToP-Biomolecular Technology of Proteins, BOKU-University of Natural Resources and Life Sciences Vienna, Vienna, Austria
| | - Gabriel Foley
- School of Chemistry & Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Elizabeth M J Gillam
- School of Chemistry & Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Mikael Bodén
- School of Chemistry & Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Dietmar Haltrich
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Vienna, Austria
- Doctoral Programme BioToP-Biomolecular Technology of Proteins, BOKU-University of Natural Resources and Life Sciences Vienna, Vienna, Austria
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134
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Yuan M, Kummer MJ, Milton RD, Quah T, Minteer SD. Efficient NADH Regeneration by a Redox Polymer-Immobilized Enzymatic System. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00513] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Mengwei Yuan
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Matthew J. Kummer
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Ross D. Milton
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Timothy Quah
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Shelley D. Minteer
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
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135
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Saipreethi P, Manian R. Probing the biomolecular targets of azo colorant carcinogens towards purified wetland peroxidase-computational cum in vitro validation. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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136
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Rodríguez-Couto S. Fungal Laccase: A Versatile Enzyme for Biotechnological Applications. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-10480-1_13] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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137
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Li TB, Zhao FJ, Liu Z, Jin Y, Liu Y, Pei XQ, Zhang ZG, Wang G, Wu ZL. Structure-guided engineering of ChKRED20 from Chryseobacterium sp. CA49 for asymmetric reduction of aryl ketoesters. Enzyme Microb Technol 2019; 125:29-36. [PMID: 30885322 DOI: 10.1016/j.enzmictec.2019.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/22/2019] [Accepted: 03/02/2019] [Indexed: 10/27/2022]
Abstract
ChKRED20 is a robust NADH-dependent ketoreductase identified from the genome of Chryseobacterium sp. CA49 that can use 2-propanol as the ultimate reducing agent. The wild-type can reduce over 100 g/l ketones for some pharmaceutical relevant substrates, exhibiting a remarkable potential for industrial application. In this work, to overcome the limitation of ChKRED20 to aryl ketoesters, we first refined the X-ray crystal structure of ChKRED20/NAD+ complex at a resolution of 1.6 Å, and then performed three rounds of iterative saturation mutagenesis at critical amino acid sites to reshape the active cavity of the enzyme. For methyl 2-oxo-2-phenylacetate and ethyl 3-oxo-3-phenylpropanoate, several gain-of-activity mutants were achieved, and for ethyl 2-oxo-4-phenylbutanoate, improved mutants were achieved with kcat/Km increasing to 196-fold of the wild-type. All three substrates were completely reduced at 100 g/l loading catalyzed with selected ChKRED20 mutants, and deliver the corresponding chiral alcohols with >90% isolated yield and 97 - >99%ee.
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Affiliation(s)
- Tong-Biao Li
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Feng-Jiao Zhao
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China
| | - Zhongchuan Liu
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China
| | - Yun Jin
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China
| | - Yan Liu
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China
| | - Xiao-Qiong Pei
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China
| | - Zhi-Gang Zhang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, 211800, China
| | - Ganggang Wang
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
| | - Zhong-Liu Wu
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu, 610041, China.
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138
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Aumala V, Mollerup F, Jurak E, Blume F, Karppi J, Koistinen AE, Schuiten E, Voß M, Bornscheuer U, Deska J, Master ER. Biocatalytic Production of Amino Carbohydrates through Oxidoreductase and Transaminase Cascades. CHEMSUSCHEM 2019; 12:848-857. [PMID: 30589228 PMCID: PMC6519198 DOI: 10.1002/cssc.201802580] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 12/23/2018] [Indexed: 06/09/2023]
Abstract
Plant-derived carbohydrates are an abundant renewable resource. Transformation of carbohydrates into new products, including amine-functionalized building blocks for biomaterials applications, can lower reliance on fossil resources. Herein, biocatalytic production routes to amino carbohydrates, including oligosaccharides, are demonstrated. In each case, two-step biocatalysis was performed to functionalize d-galactose-containing carbohydrates by employing the galactose oxidase from Fusarium graminearum or a pyranose dehydrogenase from Agaricus bisporus followed by the ω-transaminase from Chromobacterium violaceum (Cvi-ω-TA). Formation of 6-amino-6-deoxy-d-galactose, 2-amino-2-deoxy-d-galactose, and 2-amino-2-deoxy-6-aldo-d-galactose was confirmed by mass spectrometry. The activity of Cvi-ω-TA was highest towards 6-aldo-d-galactose, for which the highest yield of 6-amino-6-deoxy-d-galactose (67 %) was achieved in reactions permitting simultaneous oxidation of d-galactose and transamination of the resulting 6-aldo-d-galactose.
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Affiliation(s)
- Ville Aumala
- Department of Bioproducts and BiosystemsAalto UniversityKemistintie 102150EspooFinland
| | - Filip Mollerup
- Department of Bioproducts and BiosystemsAalto UniversityKemistintie 102150EspooFinland
| | - Edita Jurak
- Department of Aquatic Biotechnology and Bioproduct EngineeringUniversity of GroningenNijenborgh 49747AGGroningenThe Netherlands
| | - Fabian Blume
- Department of Chemistry and Materials ScienceAalto UniversityKemistintie 102150EspooFinland
| | - Johanna Karppi
- Department of Bioproducts and BiosystemsAalto UniversityKemistintie 102150EspooFinland
| | - Antti E. Koistinen
- Department of Bioproducts and BiosystemsAalto UniversityKemistintie 102150EspooFinland
| | - Eva Schuiten
- Department of Biotechnology and Enzyme CatalysisGreifswald UniversityFelix-Hausdorff-Straße 417487GreifswaldGermany
| | - Moritz Voß
- Department of Biotechnology and Enzyme CatalysisGreifswald UniversityFelix-Hausdorff-Straße 417487GreifswaldGermany
| | - Uwe Bornscheuer
- Department of Biotechnology and Enzyme CatalysisGreifswald UniversityFelix-Hausdorff-Straße 417487GreifswaldGermany
| | - Jan Deska
- Department of Chemistry and Materials ScienceAalto UniversityKemistintie 102150EspooFinland
| | - Emma R. Master
- Department of Bioproducts and BiosystemsAalto UniversityKemistintie 102150EspooFinland
- Department of Chemical Engineering and Applied ChemistryUniversity of Toronto200 College StreetTorontoOntarioM5S 3E5Canada
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139
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Bolivar JM, Mannsberger A, Thomsen MS, Tekautz G, Nidetzky B. Process intensification for O 2 -dependent enzymatic transformations in continuous single-phase pressurized flow. Biotechnol Bioeng 2019; 116:503-514. [PMID: 30512199 PMCID: PMC6590253 DOI: 10.1002/bit.26886] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/16/2018] [Accepted: 11/29/2018] [Indexed: 12/24/2022]
Abstract
Oxidative O2 -dependent biotransformations are promising for chemical synthesis, but their development to an efficiency required in fine chemical manufacturing has proven difficult. General problem for process engineering of these systems is that thermodynamic and kinetic limitations on supplying O2 to the enzymatic reaction combine to create a complex bottleneck on conversion efficiency. We show here that continuous-flow microreactor technology offers a comprehensive solution. It does so by expanding the process window to the medium pressure range (here, ≤34 bar) and thus enables biotransformations to be conducted in a single liquid phase at boosted concentrations of the dissolved O2 (here, up to 43 mM). We take reactions of glucose oxidase and d-amino acid oxidase as exemplary cases to demonstrate that the pressurized microreactor presents a powerful engineering tool uniquely apt to overcome restrictions inherent to the individual O2 -dependent transformation considered. Using soluble enzymes in liquid flow, we show reaction rate enhancement (up to six-fold) due to the effect of elevated O2 concentrations on the oxidase kinetics. When additional catalase was used to recycle dissolved O2 from the H2 O2 released in the oxidase reaction, product formation was doubled compared to the O2 supplied, in the absence of transfer from a gas phase. A packed-bed reactor containing oxidase and catalase coimmobilized on porous beads was implemented to demonstrate catalyst recyclability and operational stability during continuous high-pressure conversion. Product concentrations of up to 80 mM were obtained at low residence times (1-4 min). Up to 360 reactor cycles were performed at constant product release and near-theoretical utilization of the O2 supplied. Therefore, we show that the pressurized microreactor is practical embodiment of a general reaction-engineering concept for process intensification in enzymatic conversions requiring O2 as the cosubstrate.
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Affiliation(s)
- Juan M Bolivar
- Austrian Centre of Industrial Biotechnology (ACIB), Graz, Austria.,Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Alexander Mannsberger
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Graz, Austria
| | | | - Günter Tekautz
- Microinnova Engineering GmbH, Allerheiligen bei Wildon, Austria
| | - Bernd Nidetzky
- Austrian Centre of Industrial Biotechnology (ACIB), Graz, Austria.,Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, Graz, Austria
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140
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Immobilization of Myceliophthora thermophila
laccase on poly(glycidyl methacrylate) microspheres enhances the degradation of azinphos-methyl. J Appl Polym Sci 2018. [DOI: 10.1002/app.47417] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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141
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Robbins JM, Geng J, Barry BA, Gadda G, Bommarius AS. Photoirradiation Generates an Ultrastable 8-Formyl FAD Semiquinone Radical with Unusual Properties in Formate Oxidase. Biochemistry 2018; 57:5818-5826. [PMID: 30226367 DOI: 10.1021/acs.biochem.8b00571] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Formate oxidase (FOX) was previously shown to contain a noncovalently bound 8-formyl FAD (8-fFAD) cofactor. However, both the absorption spectra and the kinetic parameters previously reported for FOX are inconsistent with more recent reports. The ultraviolet-visible (UV-vis) absorption spectrum reported in early studies closely resembles the spectra observed for protein-bound 8-formyl flavin semiquinone species, thus suggesting FOX may be photosensitive. Therefore, the properties of dark and light-exposed FOX were investigated using steady-state kinetics and site-directed mutagenesis analysis along with inductively coupled plasma optical emission spectroscopy, UV-vis absorption spectroscopy, circular dichroism spectroscopy, liquid chromatography and mass spectrometry, and electron paramagnetic resonance (EPR) spectroscopy. Surprisingly, these experimental results demonstrate that FOX is deactivated in the presence of light through generation of an oxygen stable, anionic (red) 8-fFAD semiquinone radical capable of persisting either in an aerobic environment for multiple weeks or in the presence of a strong reducing agent like sodium dithionite. Herein, we study the photoinduced formation of the 8-fFAD semiquinone radical in FOX and report the first EPR spectrum of this radical species. The stability of the 8-fFAD semiquinone radical suggests FOX to be a model enzyme for probing the structural and mechanistic features involved in stabilizing flavin semiquinone radicals. It is likely that the photoinduced formation of a stable 8-fFAD semiquinone radical is a defining characteristic of 8-formyl flavin-dependent enzymes. Additionally, a better understanding of the radical stabilization process may yield a FOX enzyme with more robust activity and broader industrial usefulness.
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Affiliation(s)
- John M Robbins
- School of Chemical and Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332-0100 , United States.,Engineered Biosystems Building (EBB) , Georgia Institute of Technology , Atlanta , Georgia 30332-2000 , United States
| | - Jiafeng Geng
- School of Chemistry and Biochemistry, Parker H. Petit Institute of Bioengineering and Bioscience , Georgia Institute of Technology , Atlanta , Georgia 30332-0363 , United States
| | - Bridgette A Barry
- School of Chemistry and Biochemistry, Parker H. Petit Institute of Bioengineering and Bioscience , Georgia Institute of Technology , Atlanta , Georgia 30332-0363 , United States
| | - Giovanni Gadda
- Department of Chemistry , Georgia State University , Atlanta , Georgia 30302-3965 , United States.,Center for Diagnostics and Therapeutics , Georgia State University , Atlanta , Georgia 30302-3965 , United States.,Center for Biotechnology and Drug Design , Georgia State University , Atlanta , Georgia 30302-3965 , United States.,Department of Biology , Georgia State University , Atlanta , Georgia 30302-3965 , United States
| | - Andreas S Bommarius
- School of Chemical and Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332-0100 , United States.,Engineered Biosystems Building (EBB) , Georgia Institute of Technology , Atlanta , Georgia 30332-2000 , United States.,School of Chemistry and Biochemistry, Parker H. Petit Institute of Bioengineering and Bioscience , Georgia Institute of Technology , Atlanta , Georgia 30332-0363 , United States
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142
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Goacher RE, Braham EJ, Michienzi CL, Flick RM, Yakunin AF, Master ER. Direct analysis by time-of-flight secondary ion mass spectrometry reveals action of bacterial laccase-mediator systems on both hardwood and softwood samples. PHYSIOLOGIA PLANTARUM 2018; 164:5-16. [PMID: 29286544 DOI: 10.1111/ppl.12688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 12/20/2017] [Accepted: 12/26/2017] [Indexed: 06/07/2023]
Abstract
The modification and degradation of lignin play a vital role in carbon cycling as well as production of biofuels and bioproducts. The possibility of using bacterial laccases for the oxidation of lignin offers a route to utilize existing industrial protein expression techniques. However, bacterial laccases are most frequently studied on small model compounds that do not capture the complexity of lignocellulosic materials. This work studied the action of laccases from Bacillus subtilis and Salmonella typhimurium (EC 1.10.3.2) on ground wood samples from yellow birch (Betula alleghaniensis) and red spruce (Picea rubens). The ability of bacterial laccases to modify wood can be facilitated by small molecule mediators. Herein, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS), gallic acid and sinapic acid mediators were tested. Direct analysis of the wood samples was achieved by time-of-flight secondary ion mass spectrometry (ToF-SIMS), a surface sensitive mass spectrometry technique that has characteristic peaks for H, G and S lignin. The action of the bacterial laccases on both wood samples was demonstrated and revealed a strong mediator influence. The ABTS mediator led to delignification, evident in an overall increase of polysaccharide peaks in the residual solid, along with equal loss of G and S-lignin peaks. The gallic acid mediator demonstrated minimal laccase activity. Meanwhile, the sinapic acid mediator altered the S/G peak ratio consistent with mediator attaching to the wood solids. The current investigation demonstrates the action of bacterial laccase-mediator systems directly on woody materials, and the potential of using ToF-SIMS to uncover the fundamental and applied role of bacterial enzymes in lignocellulose conversion.
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Affiliation(s)
- Robyn E Goacher
- Department of Biochemistry, Chemistry and Physics, Niagara University, 5795 Lewiston Road, Lewiston, NY, 14109, USA
| | - Erick J Braham
- Department of Biochemistry, Chemistry and Physics, Niagara University, 5795 Lewiston Road, Lewiston, NY, 14109, USA
- Department of Chemistry, Texas A&M University, 580 Ross Street, College Station, TX, 77843, USA
| | - Courtney L Michienzi
- Department of Biochemistry, Chemistry and Physics, Niagara University, 5795 Lewiston Road, Lewiston, NY, 14109, USA
| | - Robert M Flick
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Alexander F Yakunin
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
| | - Emma R Master
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario, M5S 3E5, Canada
- Department of Bioproducts and Biosystems, Aalto University, FI-00076 Aalto, Kemistintie 1, Espoo, Finland
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143
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Castilla IA, Woods DF, Reen FJ, O'Gara F. Harnessing Marine Biocatalytic Reservoirs for Green Chemistry Applications through Metagenomic Technologies. Mar Drugs 2018; 16:E227. [PMID: 29973493 PMCID: PMC6071119 DOI: 10.3390/md16070227] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/13/2018] [Accepted: 06/22/2018] [Indexed: 01/24/2023] Open
Abstract
In a demanding commercial world, large-scale chemical processes have been widely utilised to satisfy consumer related needs. Chemical industries are key to promoting economic growth and meeting the requirements of a sustainable industrialised society. The market need for diverse commodities produced by the chemical industry is rapidly expanding globally. Accompanying this demand is an increased threat to the environment and to human health, due to waste produced by increased industrial production. This increased demand has underscored the necessity to increase reaction efficiencies, in order to reduce costs and increase profits. The discovery of novel biocatalysts is a key method aimed at combating these difficulties. Metagenomic technology, as a tool for uncovering novel biocatalysts, has great potential and applicability and has already delivered many successful achievements. In this review we discuss, recent developments and achievements in the field of biocatalysis. We highlight how green chemistry principles through the application of biocatalysis, can be successfully promoted and implemented in various industrial sectors. In addition, we demonstrate how two novel lipases/esterases were mined from the marine environment by metagenomic analysis. Collectively these improvements can result in increased efficiency, decreased energy consumption, reduced waste and cost savings for the chemical industry.
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Affiliation(s)
- Ignacio Abreu Castilla
- BIOMERIT Research Centre, School of Microbiology, University College Cork, T12 K8AF Cork, Ireland.
| | - David F Woods
- BIOMERIT Research Centre, School of Microbiology, University College Cork, T12 K8AF Cork, Ireland.
| | - F Jerry Reen
- School of Microbiology, University College Cork, T12 K8AF Cork, Ireland.
| | - Fergal O'Gara
- BIOMERIT Research Centre, School of Microbiology, University College Cork, T12 K8AF Cork, Ireland.
- Telethon Kids Institute, Perth, WA 6008, Australia.
- Human Microbiome Programme, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
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144
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Laccase-based synthesis of SIC-RED: A new dyeing product for protein gel staining. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.06.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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145
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Carro J, Amengual-Rigo P, Sancho F, Medina M, Guallar V, Ferreira P, Martínez AT. Multiple implications of an active site phenylalanine in the catalysis of aryl-alcohol oxidase. Sci Rep 2018; 8:8121. [PMID: 29802285 PMCID: PMC5970180 DOI: 10.1038/s41598-018-26445-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 05/11/2018] [Indexed: 01/15/2023] Open
Abstract
Aryl-alcohol oxidase (AAO) has demonstrated to be an enzyme with a bright future ahead due to its biotechnological potential in deracemisation of chiral compounds, production of bioplastic precursors and other reactions of interest. Expanding our understanding on the AAO reaction mechanisms, through the investigation of its structure-function relationships, is crucial for its exploitation as an industrial biocatalyst. In this regard, previous computational studies suggested an active role for AAO Phe397 at the active-site entrance. This residue is located in a loop that partially covers the access to the cofactor forming a bottleneck together with two other aromatic residues. Kinetic and affinity spectroscopic studies, complemented with computational simulations using the recently developed adaptive-PELE technology, reveal that the Phe397 residue is important for product release and to help the substrates attain a catalytically relevant position within the active-site cavity. Moreover, removal of aromaticity at the 397 position impairs the oxygen-reduction activity of the enzyme. Experimental and computational findings agree very well in the timing of product release from AAO, and the simulations help to understand the experimental results. This highlights the potential of adaptive-PELE to provide answers to the questions raised by the empirical results in the study of enzyme mechanisms.
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Affiliation(s)
- Juan Carro
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040, Madrid, Spain
| | - Pep Amengual-Rigo
- Barcelona Supercomputing Center, Jordi Girona 31, E-08034, Barcelona, Spain
| | - Ferran Sancho
- Barcelona Supercomputing Center, Jordi Girona 31, E-08034, Barcelona, Spain
| | - Milagros Medina
- Department of Biochemistry and Cellular and Molecular Biology, and BIFI, University of Zaragoza, E-50009, Zaragoza, Spain
| | - Victor Guallar
- Barcelona Supercomputing Center, Jordi Girona 31, E-08034, Barcelona, Spain. .,ICREA, Passeig Lluís Companys 23, E-08010, Barcelona, Spain.
| | - Patricia Ferreira
- Department of Biochemistry and Cellular and Molecular Biology, and BIFI, University of Zaragoza, E-50009, Zaragoza, Spain.
| | - Angel T Martínez
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040, Madrid, Spain.
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146
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Manirafasha E, Murwanashyaka T, Ndikubwimana T, Rashid Ahmed N, Liu J, Lu Y, Zeng X, Ling X, Jing K. Enhancement of cell growth and phycocyanin production in Arthrospira (Spirulina) platensis by metabolic stress and nitrate fed-batch. BIORESOURCE TECHNOLOGY 2018; 255:293-301. [PMID: 29422330 DOI: 10.1016/j.biortech.2017.12.068] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 12/20/2017] [Accepted: 12/21/2017] [Indexed: 06/08/2023]
Abstract
Arthrospira (Spirulina) platensis is known to have high-quality proteins content and phycocyanin as one of the major pigment constituents of the cells, and the most challenging problem associated with phycocyanin production in Arthrospira is to optimize its intracellular accumulation. The present study evaluated the metabolic stress conditions (by nutrient enrichment) of Arthrospira platensis FACHB-314 for boosting biomass growth and high content phycocyanin accumulation. Experimental results showed that 5 mM sodium glutamate and 7.5 mM succinic acid could enhance biomass yield as well as phycocyanin accumulation compared with that of the control groups. The present study demonstrates that the biomass growth and phycocyanin accumulation were significantly enhanced in fed-batch cultivation of Arthrospira platensis by applying the substrates as metabolic stress agents combined with nitrate feeding strategy. cobA/hemD, hemG and ho genes presented the over-expression level with adding sodium glutamate and succinic acid in cultures, respectively, compared to the control groups.
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Affiliation(s)
- Emmanuel Manirafasha
- Department of Chemical and Biochemical Engineering and the Key Lab for Synthetic Biotechnology of Xiamen City, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; University of Rwanda-College of Education, P.O. Box 5039, Kigali, Rwanda
| | - Theophile Murwanashyaka
- Department of Chemical and Biochemical Engineering and the Key Lab for Synthetic Biotechnology of Xiamen City, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | | | - Nur Rashid Ahmed
- Department of Chemical and Biochemical Engineering and the Key Lab for Synthetic Biotechnology of Xiamen City, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jingyi Liu
- Department of Chemical and Biochemical Engineering and the Key Lab for Synthetic Biotechnology of Xiamen City, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yinghua Lu
- Department of Chemical and Biochemical Engineering and the Key Lab for Synthetic Biotechnology of Xiamen City, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Xianhai Zeng
- College of Energy, Xiamen University, Xiamen 361005, China
| | - Xueping Ling
- Department of Chemical and Biochemical Engineering and the Key Lab for Synthetic Biotechnology of Xiamen City, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Keju Jing
- Department of Chemical and Biochemical Engineering and the Key Lab for Synthetic Biotechnology of Xiamen City, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
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147
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Ewing TA, Kühn J, Segarra S, Tortajada M, Zuhse R, van Berkel WJH. Multigram Scale Enzymatic Synthesis of (R)-1-(4′-Hydroxyphenyl)ethanol Using Vanillyl Alcohol Oxidase. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800197] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tom A. Ewing
- Laboratory of Biochemistry; Wageningen University & Research; Stippeneng 4 6708 WE Wageningen The Netherlands
| | - Jasmin Kühn
- Chiracon GmbH; Biotechnologiepark 14943 Luckenwalde Germany
| | - Silvia Segarra
- Biopolis S. L.; Parc Científic de la Universitat de València; Edificio 2, C/Catedrático Agustín Escardino 9 46980 Paterna Spain
| | - Marta Tortajada
- Biopolis S. L.; Parc Científic de la Universitat de València; Edificio 2, C/Catedrático Agustín Escardino 9 46980 Paterna Spain
| | - Ralf Zuhse
- Chiracon GmbH; Biotechnologiepark 14943 Luckenwalde Germany
| | - Willem J. H. van Berkel
- Laboratory of Biochemistry; Wageningen University & Research; Stippeneng 4 6708 WE Wageningen The Netherlands
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148
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Carro J, Fernández-Fueyo E, Fernández-Alonso C, Cañada J, Ullrich R, Hofrichter M, Alcalde M, Ferreira P, Martínez AT. Self-sustained enzymatic cascade for the production of 2,5-furandicarboxylic acid from 5-methoxymethylfurfural. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:86. [PMID: 29619082 PMCID: PMC5880071 DOI: 10.1186/s13068-018-1091-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 03/21/2018] [Indexed: 05/25/2023]
Abstract
BACKGROUND 2,5-Furandicarboxylic acid is a renewable building block for the production of polyfurandicarboxylates, which are biodegradable polyesters expected to substitute their classical counterparts derived from fossil resources. It may be produced from bio-based 5-hydroxymethylfurfural or 5-methoxymethylfurfural, both obtained by the acidic dehydration of biomass-derived fructose. 5-Methoxymethylfurfural, which is produced in the presence of methanol, generates less by-products and exhibits better storage stability than 5-hydroxymethylfurfural being, therefore, the industrial substrate of choice. RESULTS In this work, an enzymatic cascade involving three fungal oxidoreductases has been developed for the production of 2,5-furandicarboxylic acid from 5-methoxymethylfurfural. Aryl-alcohol oxidase and unspecific peroxygenase act on 5-methoxymethylfurfural and its partially oxidized derivatives yielding 2,5-furandicarboxylic acid, as well as methanol as a by-product. Methanol oxidase takes advantage of the methanol released for in situ producing H2O2 that, along with that produced by aryl-alcohol oxidase, fuels the peroxygenase reactions. In this way, the enzymatic cascade proceeds independently, with the only input of atmospheric O2, to attain a 70% conversion of initial 5-methoxymethylfurfural. The addition of some exogenous methanol to the reaction further improves the yield to attain an almost complete conversion of 5-methoxymethylfurfural into 2,5-furandicarboxylic acid. CONCLUSIONS The synergistic action of aryl-alcohol oxidase and unspecific peroxygenase in the presence of 5-methoxymethylfurfural and O2 is sufficient for the production of 2,5-furandicarboxylic acid. The addition of methanol oxidase to the enzymatic cascade increases the 2,5-furandicarboxylic acid yields by oxidizing a reaction by-product to fuel the peroxygenase reactions.
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Affiliation(s)
- Juan Carro
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - Elena Fernández-Fueyo
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | | | - Javier Cañada
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
| | - René Ullrich
- Department of Bio- and Environmental Sciences, International Institute Zittau - Technische Universität Dresden, Markt 23, 02763 Zittau, Germany
| | - Martin Hofrichter
- Department of Bio- and Environmental Sciences, International Institute Zittau - Technische Universität Dresden, Markt 23, 02763 Zittau, Germany
| | - Miguel Alcalde
- Department of Biocatalysis, Institute of Catalysis, CSIC, Marie Curie 2, E-28049 Madrid, Spain
| | - Patricia Ferreira
- Department of Biochemistry and Molecular and Cellular Biology and BIFI, University of Zaragoza, E-50009 Saragossa, Spain
| | - Angel T. Martínez
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain
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149
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Viña-Gonzalez J, Elbl K, Ponte X, Valero F, Alcalde M. Functional expression of aryl-alcohol oxidase in Saccharomyces cerevisiae
and Pichia pastoris
by directed evolution. Biotechnol Bioeng 2018. [DOI: 10.1002/bit.26585] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Javier Viña-Gonzalez
- Department of Biocatalysis; Institute of Catalysis, CSIC; Cantoblanco Madrid Spain
| | - Katarina Elbl
- Department of Biocatalysis; Institute of Catalysis, CSIC; Cantoblanco Madrid Spain
| | - Xavier Ponte
- Departamento de Ingeniería Química; Biológica y Medioambiental, Escuela de Ingeniería, Universidad Autónoma de Barcelona; Bellaterra Barcelona Spain
| | - Francisco Valero
- Departamento de Ingeniería Química; Biológica y Medioambiental, Escuela de Ingeniería, Universidad Autónoma de Barcelona; Bellaterra Barcelona Spain
| | - Miguel Alcalde
- Department of Biocatalysis; Institute of Catalysis, CSIC; Cantoblanco Madrid Spain
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150
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Mobilia KC, Hutchison JM, Zilles JL. Characterizing Isozymes of Chlorite Dismutase for Water Treatment. Front Microbiol 2018; 8:2423. [PMID: 29312158 PMCID: PMC5733030 DOI: 10.3389/fmicb.2017.02423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/22/2017] [Indexed: 11/13/2022] Open
Abstract
This work investigated the potential for biocatalytic degradation of micropollutants, focusing on chlorine oxyanions as model contaminants, by mining biology to identify promising biocatalysts. Existing isozymes of chlorite dismutase (Cld) were characterized with respect to parameters relevant to this high volume, low-value product application: kinetic parameters, resistance to catalytic inactivation, and stability. Maximum reaction velocities (Vmax) were typically on the order of 104 μmol min-1 (μmol heme)-1. Substrate affinity (Km) values were on the order of 100 μM, except for the Cld from Candidatus Nitrospira defluvii (NdCld), which showed a significantly lower affinity for chlorite. NdCld also had the highest susceptibility to catalytic inactivation. In contrast, the Cld from Ideonella dechloratans was least susceptible to catalytic inactivation, with a maximum turnover number of approximately 150,000, more than sevenfold higher than other tested isozymes. Under non-reactive conditions, Cld was quite stable, retaining over 50% of activity after 30 days, and most samples retained activity even after 90–100 days. Overall, Cld from I. dechloratans was the most promising candidate for environmental applications, having high affinity and activity, a relatively low propensity for catalytic inactivation, and excellent stability.
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Affiliation(s)
- Kellen C Mobilia
- Department of Civil Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Justin M Hutchison
- Department of Civil Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Julie L Zilles
- Department of Civil Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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