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Oliva B, Velasco J, Leila Berto G, Polikarpov I, Cristante de Oliveira L, Segato F. Recombinant cellobiose dehydrogenase from Thermothelomyces thermophilus: Its functional characterization and applicability in cellobionic acid production. BIORESOURCE TECHNOLOGY 2024; 402:130763. [PMID: 38692377 DOI: 10.1016/j.biortech.2024.130763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/10/2024] [Accepted: 04/28/2024] [Indexed: 05/03/2024]
Abstract
The fungus Thermothelomyces thermophilus is a thermotolerant microorganism that has been explored as a reservoir for enzymes (hydrolytic enzymes and oxidoreductases). The functional analysis of a recombinant cellobiose dehydrogenase (MtCDHB) from T. thermophilus demonstrated a thermophilic behavior, an optimal pH in alkaline conditions for inter-domain electron transfer, and catalytic activity on cellooligosaccharides with different degree of polymerization. Its applicability was evaluated to the sustainable production of cellobionic acid (CBA), a potential pharmaceutical and cosmetic ingredient rarely commercialized. Dissolving pulp was used as a disaccharide source for MtCDHB. Initially, recombinant exoglucanases (MtCBHI and MtCBHII) from T. thermophilus hydrolyzed the dissolving pulp, resulting in 87% cellobiose yield, which was subsequently converted into CBA by MtCDHB, achieving a 66% CBA yield after 24 h. These findings highlight the potential of MtCDHB as a novel approach to obtaining CBA through the bioconversion of a plant-based source.
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Affiliation(s)
- Bianca Oliva
- Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, SP, Brazil
| | - Josman Velasco
- Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, SP, Brazil; Biological Sciences Department, Universidad de los Andes, Bogotá DC, Colombia
| | - Gabriela Leila Berto
- Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, SP, Brazil
| | - Igor Polikarpov
- São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil
| | - Leandro Cristante de Oliveira
- Department of Physics, Institute of Biosciences, Humanities and Exact Sciences (IBILCE) São Paulo State University "Júlio de Mesquita Filho" - Unesp - São José do Rio Preto, SP, Brazil
| | - Fernando Segato
- Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, SP, Brazil.
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2
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Giorgianni A, Zenone A, Sützl L, Csarman F, Ludwig R. Exploring class III cellobiose dehydrogenase: sequence analysis and optimized recombinant expression. Microb Cell Fact 2024; 23:146. [PMID: 38783303 PMCID: PMC11112829 DOI: 10.1186/s12934-024-02420-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 05/07/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Cellobiose dehydrogenase (CDH) is an extracellular fungal oxidoreductase with multiple functions in plant biomass degradation. Its primary function as an auxiliary enzyme of lytic polysaccharide monooxygenase (LPMO) facilitates the efficient depolymerization of cellulose, hemicelluloses and other carbohydrate-based polymers. The synergistic action of CDH and LPMO that supports biomass-degrading hydrolases holds significant promise to harness renewable resources for the production of biofuels, chemicals, and modified materials in an environmentally sustainable manner. While previous phylogenetic analyses have identified four distinct classes of CDHs, only class I and II have been biochemically characterized so far. RESULTS Following a comprehensive database search aimed at identifying CDH sequences belonging to the so far uncharacterized class III for subsequent expression and biochemical characterization, we have curated an extensive compilation of putative CDH amino acid sequences. A sequence similarity network analysis was used to cluster them into the four distinct CDH classes. A total of 1237 sequences encoding putative class III CDHs were extracted from the network and used for phylogenetic analyses. The obtained phylogenetic tree was used to guide the selection of 11 cdhIII genes for recombinant expression in Komagataella phaffii. A small-scale expression screening procedure identified a promising cdhIII gene originating from the plant pathogen Fusarium solani (FsCDH), which was selected for expression optimization by signal peptide shuffling and subsequent production in a 5-L bioreactor. The purified FsCDH exhibits a UV-Vis spectrum and enzymatic activity similar to other characterized CDH classes. CONCLUSION The successful production and functional characterization of FsCDH proved that class III CDHs are catalytical active enzymes resembling the key properties of class I and class II CDHs. A detailed biochemical characterization based on the established expression and purification strategy can provide new insights into the evolutionary process shaping CDHs and leading to their differentiation into the four distinct classes. The findings have the potential to broaden our understanding of the biocatalytic application of CDH and LPMO for the oxidative depolymerization of polysaccharides.
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Affiliation(s)
- Angela Giorgianni
- Department of Food Science and Technology, Institute of Food Technology, BOKU University, Muthgasse 18, Vienna, 1190, Austria
| | - Alice Zenone
- Department of Food Science and Technology, Institute of Food Technology, BOKU University, Muthgasse 18, Vienna, 1190, Austria
| | - Leander Sützl
- Department of Food Science and Technology, Institute of Food Technology, BOKU University, Muthgasse 18, Vienna, 1190, Austria
| | - Florian Csarman
- Department of Food Science and Technology, Institute of Food Technology, BOKU University, Muthgasse 18, Vienna, 1190, Austria.
| | - Roland Ludwig
- Department of Food Science and Technology, Institute of Food Technology, BOKU University, Muthgasse 18, Vienna, 1190, Austria
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Siriatcharanon AK, Sutheeworapong S, Baramee S, Waeonukul R, Pason P, Kosugi A, Uke A, Ratanakhanokchai K, Tachaapaikoon C. Discovery of a Novel Cellobiose Dehydrogenase from Cellulomonas palmilytica EW123 and Its Sugar Acids Production. J Microbiol Biotechnol 2024; 34:457-466. [PMID: 38044713 PMCID: PMC10940743 DOI: 10.4014/jmb.2307.07004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/22/2023] [Accepted: 09/20/2023] [Indexed: 12/05/2023]
Abstract
Cellobiose dehydrogenases (CDHs) are a group of enzymes belonging to the hemoflavoenzyme group, which are mostly found in fungi. They play an important role in the production of acid sugar. In this research, CDH annotated from the actinobacterium Cellulomonas palmilytica EW123 (CpCDH) was cloned and characterized. The CpCDH exhibited a domain architecture resembling class-I CDH found in Basidiomycota. The cytochrome c and flavin-containing dehydrogenase domains in CpCDH showed an extra-long evolutionary distance compared to fungal CDH. The amino acid sequence of CpCDH revealed conservative catalytic amino acids and a distinct flavin adenine dinucleotide region specific to CDH, setting it apart from closely related sequences. The physicochemical properties of CpCDH displayed optimal pH conditions similar to those of CDHs but differed in terms of optimal temperature. The CpCDH displayed excellent enzymatic activity at low temperatures (below 30°C), unlike other CDHs. Moreover, CpCDH showed the highest substrate specificity for disaccharides such as cellobiose and lactose, which contain a glucose molecule at the non-reducing end. The catalytic efficiency of CpCDH for cellobiose and lactose were 2.05 x 105 and 9.06 x 104 (M-1 s-1), respectively. The result from the Fourier-transform infrared spectroscopy (FT-IR) spectra confirmed the presence of cellobionic and lactobionic acids as the oxidative products of CpCDH. This study establishes CpCDH as a novel and attractive bacterial CDH, representing the first report of its kind in the Cellulomonas genus.
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Affiliation(s)
- Ake-kavitch Siriatcharanon
- Division of Biochemical Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
| | - Sawannee Sutheeworapong
- Division of Bioinformatics and Systems Biology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
| | - Sirilak Baramee
- Excellent Center of Enzyme Technology and Microbial Utilization, Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
| | - Rattiya Waeonukul
- Division of Biochemical Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
- Excellent Center of Enzyme Technology and Microbial Utilization, Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
| | - Patthra Pason
- Division of Biochemical Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
- Excellent Center of Enzyme Technology and Microbial Utilization, Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
| | - Akihiko Kosugi
- Biological Resources and Post-harvest Division, Japan International Research Center for Agricultural Sciences (JIRCAS), 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686, Japan
| | - Ayaka Uke
- Biological Resources and Post-harvest Division, Japan International Research Center for Agricultural Sciences (JIRCAS), 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686, Japan
| | - Khanok Ratanakhanokchai
- Division of Biochemical Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
- Excellent Center of Enzyme Technology and Microbial Utilization, Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
| | - Chakrit Tachaapaikoon
- Division of Biochemical Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
- Excellent Center of Enzyme Technology and Microbial Utilization, Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10150, Thailand
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4
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Grace Barrios-Gutiérrez S, Inés Vélez-Mercado M, Rodrigues Ortega J, da Silva Lima A, Luiza da Rocha Fortes Saraiva A, Leila Berto G, Segato F. Oxidative Machinery of basidiomycetes as potential enhancers in lignocellulosic biorefineries: A lytic polysaccharide monooxygenases approach. BIORESOURCE TECHNOLOGY 2023; 386:129481. [PMID: 37437815 DOI: 10.1016/j.biortech.2023.129481] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/05/2023] [Accepted: 07/08/2023] [Indexed: 07/14/2023]
Abstract
Basidiomycetes are renowned as highly effective decomposers of plant materials, due to their extensive array of oxidative enzymes, which enable them to efficiently break down complex lignocellulosic biomass structures. Among the oxidative machinery of industrially relevant basidiomycetes, the role of lytic polysaccharide monooxygenases (LPMO) in lignocellulosic biomass deconstruction is highlighted. So far, only a limited number of basidiomycetes LPMOs have been identified and heterologously expressed. These LPMOs have presented activity on cellulose and hemicellulose, as well as participation in the deconstruction of lignin. Expanding on this, the current review proposes both enzymatic and non-enzymatic mechanisms of LPMOs for biomass conversion, considering the significance of the Carbohydrate-Binding Modules and other C-terminal regions domains associated with their structure, which is involved in the deconstruction of lignocellulosic biomass.
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Affiliation(s)
- Solange Grace Barrios-Gutiérrez
- Synthetic and Molecular Biology Laboratory (SyMB), Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, Brazil
| | - Martha Inés Vélez-Mercado
- Synthetic and Molecular Biology Laboratory (SyMB), Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, Brazil
| | - Júlia Rodrigues Ortega
- Synthetic and Molecular Biology Laboratory (SyMB), Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, Brazil
| | - Awana da Silva Lima
- Synthetic and Molecular Biology Laboratory (SyMB), Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, Brazil
| | - Ana Luiza da Rocha Fortes Saraiva
- Synthetic and Molecular Biology Laboratory (SyMB), Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, Brazil
| | - Gabriela Leila Berto
- Synthetic and Molecular Biology Laboratory (SyMB), Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, Brazil
| | - Fernando Segato
- Synthetic and Molecular Biology Laboratory (SyMB), Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, São Paulo, Brazil.
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Samaniego LVB, Higasi PMR, de Mello Capetti CC, Cortez AA, Pratavieira S, de Oliveira Arnoldi Pellegrini V, Dabul ANG, Segato F, Polikarpov I. Staphylococcus aureus microbial biofilms degradation using cellobiose dehydrogenase from Thermothelomyces thermophilus M77. Int J Biol Macromol 2023; 247:125822. [PMID: 37451383 DOI: 10.1016/j.ijbiomac.2023.125822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/09/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
This work reports biochemical characterization of Thermothelomyces thermophilus cellobiose dehydrogenase (TthCDHIIa) and its application as an antimicrobial and antibiofilm agent. We demonstrate that TthCDHIIa is thermostable in different ionic solutions and is capable of oxidizing multiple mono and oligosaccharide substrates and to continuously produce H2O2. Kinetics measurements depict the enzyme catalytic characteristics consistent with an Ascomycota class II CDH. Our structural analyses show that TthCDHIIa substrate binding pocket is spacious enough to accommodate larger cello and xylooligosaccharides. We also reveal that TthCDHIIa supplemented with cellobiose reduces the viability of S. aureus ATCC 25923 up to 32 % in a planktonic growth model and also inhibits its biofilm growth on 62.5 %. Furthermore, TthCDHIIa eradicates preformed S. aureus biofilms via H2O2 oxidative degradation of the biofilm matrix, making these bacteria considerably more susceptible to gentamicin and tetracycline.
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Affiliation(s)
| | - Paula Miwa Rabelo Higasi
- Sao Carlos Institute of Physics, University of Sao Paulo, 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil
| | - Caio Cesar de Mello Capetti
- Sao Carlos Institute of Physics, University of Sao Paulo, 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil
| | - Anelyse Abreu Cortez
- Sao Carlos Institute of Physics, University of Sao Paulo, 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil
| | - Sebastião Pratavieira
- Sao Carlos Institute of Physics, University of Sao Paulo, 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil
| | | | - Andrei Nicoli Gebieluca Dabul
- Sao Carlos Institute of Physics, University of Sao Paulo, 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil
| | - Fernando Segato
- Lorena School of Engineering, University of Sao Paulo, Estrada Municipal do Campinho, 12602-810 Lorena, SP, Brazil
| | - Igor Polikarpov
- Sao Carlos Institute of Physics, University of Sao Paulo, 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil.
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6
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Zhang L, Laurent CVF, Schwaiger L, Wang L, Ma S, Ludwig R. Interdomain Linker of the Bioelecrocatalyst Cellobiose Dehydrogenase Governs the Electron Transfer. ACS Catal 2023; 13:8195-8205. [PMID: 37342832 PMCID: PMC10278072 DOI: 10.1021/acscatal.3c02116] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 05/19/2023] [Indexed: 06/23/2023]
Abstract
Direct bioelectrocatalysis applied in biosensors, biofuel cells, and bioelectrosynthesis is based on an efficient electron transfer between enzymes and electrodes in the absence of redox mediators. Some oxidoreductases are capable of direct electron transfer (DET), while others achieve the enzyme to electrode electron transfer (ET) by employing an electron-transferring domain. Cellobiose dehydrogenase (CDH) is the most-studied multidomain bioelectrocatalyst and features a catalytic flavodehydrogenase domain and a mobile, electron-transferring cytochrome domain connected by a flexible linker. The ET to the physiological redox partner lytic polysaccharide monooxygenase or, ex vivo, electrodes depends on the flexibility of the electron transferring domain and its connecting linker, but the regulatory mechanism is little understood. Studying the linker sequences of currently characterized CDH classes we observed that the inner, mobile linker sequence is flanked by two outer linker regions that are in close contact with the adjacent domain. A function-based definition of the linker region in CDH is proposed and has been verified by rationally designed variants of Neurospora crassa CDH. The effect of linker length and its domain attachment on electron transfer rates has been determined by biochemical and electrochemical methods, while distances between the domains of CDH variants were computed. This study elucidates the regulatory mechanism of the interdomain linker on electron transfer by determining the minimum linker length, observing the effects of elongated linkers, and testing the covalent stabilization of a linker part to the flavodehydrogenase domain. The evolutionary guided, rational design of the interdomain linker provides a strategy to optimize electron transfer rates in multidomain enzymes and maximize their bioelectrocatalytic performance.
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Affiliation(s)
- Lan Zhang
- Department
of Food Science and Technology, Biocatalysis and Biosensing Laboratory, University of Natural Resources and Life Sciences
(BOKU), Vienna, Muthgasse 18, Vienna 1190, Austria
| | - Christophe V. F.
P. Laurent
- Department
of Food Science and Technology, Biocatalysis and Biosensing Laboratory, University of Natural Resources and Life Sciences
(BOKU), Vienna, Muthgasse 18, Vienna 1190, Austria
- Institute
of Molecular Modeling and Simulation, Department of Material Sciences
and Process Engineering, University of Natural
Resources and Life Sciences (BOKU), Vienna, Muthgasse 18, Vienna 1190, Austria
| | - Lorenz Schwaiger
- Department
of Food Science and Technology, Biocatalysis and Biosensing Laboratory, University of Natural Resources and Life Sciences
(BOKU), Vienna, Muthgasse 18, Vienna 1190, Austria
| | - Lushan Wang
- State
Key Laboratory of Microbial Technology, Shandong University, Binhai Road 72/N2, Qingdao 266237, China
| | - Su Ma
- Department
of Food Science and Technology, Biocatalysis and Biosensing Laboratory, University of Natural Resources and Life Sciences
(BOKU), Vienna, Muthgasse 18, Vienna 1190, Austria
- State
Key Laboratory of Microbial Technology, Shandong University, Binhai Road 72/N2, Qingdao 266237, China
| | - Roland Ludwig
- Department
of Food Science and Technology, Biocatalysis and Biosensing Laboratory, University of Natural Resources and Life Sciences
(BOKU), Vienna, Muthgasse 18, Vienna 1190, Austria
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7
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Qin X, Yang K, Zou J, Wang X, Tu T, Wang Y, Su X, Yao B, Huang H, Luo H. Heterologous expression and characterization of novel GH12 β-glucanase and AA10 lytic polysaccharide monooxygenase from Streptomyces megaspores and their synergistic action in cellulose saccharification. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:89. [PMID: 37221623 DOI: 10.1186/s13068-023-02332-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 04/27/2023] [Indexed: 05/25/2023]
Abstract
BACKGROUND The combination of cellulase and lytic polysaccharide monooxygenase (LPMO) is known to boost enzymatic saccharification of cellulose. Although the synergy between cellulases (GH5, 6 or 7) and LPMOs (AA9) has been extensively studied, the interplay between other glycoside hydrolase and LPMO families remains poorly understood. RESULTS In this study, two cellulolytic enzyme-encoding genes SmBglu12A and SmLpmo10A from Streptomyces megaspores were identified and heterologously expressed in Escherichia coli. The recombinant SmBglu12A is a non-typical endo-β-1,4-glucanase that preferentially hydrolyzed β-1,3-1,4-glucans and slightly hydrolyzed β-1,4-glucans and belongs to GH12 family. The recombinant SmLpmo10A belongs to a C1-oxidizing cellulose-active LPMO that catalyzed the oxidation of phosphoric acid swollen cellulose to produce celloaldonic acids. Moreover, individual SmBglu12A and SmLpmo10A were both active on barley β-1,3-1,4-glucan, lichenan, sodium carboxymethyl cellulose, phosphoric acid swollen cellulose, as well as Avicel. Furthermore, the combination of SmBglu12A and SmLpmo10A enhanced enzymatic saccharification of phosphoric acid swollen cellulose by improving the native and oxidized cello-oligosaccharides yields. CONCLUSIONS These results proved for the first time that the AA10 LPMO was able to boost the catalytic efficiency of GH12 glycoside hydrolases on cellulosic substrates, providing another novel combination of glycoside hydrolase and LPMO for cellulose enzymatic saccharification.
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Affiliation(s)
- Xing Qin
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Kun Yang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jiahuan Zou
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaolu Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Tao Tu
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yuan Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaoyun Su
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Bin Yao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Huoqing Huang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.
| | - Huiying Luo
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.
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Bachar O, Cohen R, Meirovich MM, Cohen Y, Yehezkeli O. Biotic-abiotic hybrids for bioanalytics and biocatalysis. Curr Opin Biotechnol 2023; 81:102943. [PMID: 37116411 DOI: 10.1016/j.copbio.2023.102943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/09/2023] [Accepted: 03/18/2023] [Indexed: 04/30/2023]
Abstract
The advances in biotic-abiotic interfaced systems open new directions toward bioanalytics and biocatalysis applications. Conjugating the unique electronic and optic properties of nanoelements with the high selectivity and extraordinary catalytic abilities of biotic materials holds great promise to gain superior new features. Herein, we present a wide scope of biotic-abiotic research, with key examples for its utilization in bioanalytics applications as well as in biocatalysis. The described configurations feature methodologies that enable extending the known scientific toolbox to gain synergy. These new nanobiohybrids may contribute to major global challenges, for example, developing alternative energy utilization or new affordable biodiagnostics and therapeutics tools.
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Affiliation(s)
- Oren Bachar
- Faculty of Biotechnology and Food Engineering, Technion Israel Institute of Technology, Haifa, Israel
| | - Roy Cohen
- Faculty of Biotechnology and Food Engineering, Technion Israel Institute of Technology, Haifa, Israel
| | - Matan M Meirovich
- Faculty of Biotechnology and Food Engineering, Technion Israel Institute of Technology, Haifa, Israel
| | - Yifat Cohen
- Faculty of Biotechnology and Food Engineering, Technion Israel Institute of Technology, Haifa, Israel
| | - Omer Yehezkeli
- Faculty of Biotechnology and Food Engineering, Technion Israel Institute of Technology, Haifa, Israel; Russell Berrie Nanotechnology Institute, Technion - Israel Institute of Technology; The Nancy and Stephen Grand Technion Energy Program, Technion - Israel Institute of Technology.
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9
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Psotta C, Cirovic S, Gudmundsson P, Falk M, Mandal T, Reichhart T, Leech D, Ludwig R, Kittel R, Schuhmann W, Shleev S. Continuous ex vivo glucose sensing in human physiological fluids using an enzymatic sensor in a vein replica. Bioelectrochemistry 2023; 152:108441. [PMID: 37087795 DOI: 10.1016/j.bioelechem.2023.108441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 04/25/2023]
Abstract
Managing blood glucose can affect important clinical outcomes during the intraoperative phase of surgery. However, currently available instruments for glucose monitoring during surgery are few and not optimized for the specific application. Here we report an attempt to exploit an enzymatic sensor in a vein replica that could continuously monitor glucose level in an authentic human bloodstream. First, detailed investigations of the superficial venous systems of volunteers were carried out using ocular and palpating examinations, as well as advanced ultrasound measurements. Second, a tubular glucose-sensitive biosensor mimicking a venous system was designed and tested. Almost ideal linear dependence of current output on glucose concentration in phosphate buffer saline was obtained in the range 2.2-22.0 mM, whereas the dependence in human plasma was less linear. Finally, the developed biosensor was investigated in whole blood under homeostatic conditions. A specific correlation was found between the current output and glucose concentration at the initial stage of the biodevice operation. However, with time, blood coagulation during measurements negatively affected the performance of the biodevice. When the experimental results were remodeled to predict the response without the influence of blood coagulation, the sensor output closely followed the blood glucose level.
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Affiliation(s)
- Carolin Psotta
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden; Aptusens AB, 293 94 Kyrkhult, Sweden
| | - Stefan Cirovic
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden
| | - Petri Gudmundsson
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden
| | - Magnus Falk
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden
| | - Tanushree Mandal
- School of Chemistry & Ryan Institute, University of Galway, University Road, Galway, Ireland
| | - Thomas Reichhart
- Department of Food Science and Technology, BOKU - University of Natural Resources and Life Sciences, 1190 Vienna, Austria; DirectSens Biosensors GmbH, 3400 Klosterneuburg, Austria
| | - Dónal Leech
- School of Chemistry & Ryan Institute, University of Galway, University Road, Galway, Ireland
| | - Roland Ludwig
- Department of Food Science and Technology, BOKU - University of Natural Resources and Life Sciences, 1190 Vienna, Austria; DirectSens Biosensors GmbH, 3400 Klosterneuburg, Austria
| | - Roman Kittel
- Department of Food Science and Technology, BOKU - University of Natural Resources and Life Sciences, 1190 Vienna, Austria
| | - Wolfgang Schuhmann
- Analytical Chemistry - Center for Electrochemical Sciences, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Sergey Shleev
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden; Aptusens AB, 293 94 Kyrkhult, Sweden.
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10
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Marynowska M, Sillam-Dussès D, Untereiner B, Klimek D, Goux X, Gawron P, Roisin Y, Delfosse P, Calusinska M. A holobiont approach towards polysaccharide degradation by the highly compartmentalised gut system of the soil-feeding higher termite Labiotermes labralis. BMC Genomics 2023; 24:115. [PMID: 36922761 PMCID: PMC10018900 DOI: 10.1186/s12864-023-09224-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 03/03/2023] [Indexed: 03/17/2023] Open
Abstract
BACKGROUND Termites are among the most successful insects on Earth and can feed on a broad range of organic matter at various stages of decomposition. The termite gut system is often referred to as a micro-reactor and is a complex structure consisting of several components. It includes the host, its gut microbiome and fungal gardens, in the case of fungi-growing higher termites. The digestive tract of soil-feeding higher termites is characterised by radial and axial gradients of physicochemical parameters (e.g. pH, O2 and H2 partial pressure), and also differs in the density and structure of residing microbial communities. Although soil-feeding termites account for 60% of the known termite species, their biomass degradation strategies are far less known compared to their wood-feeding counterparts. RESULTS In this work, we applied an integrative multi-omics approach for the first time at the holobiont level to study the highly compartmentalised gut system of the soil-feeding higher termite Labiotermes labralis. We relied on 16S rRNA gene community profiling, metagenomics and (meta)transcriptomics to uncover the distribution of functional roles, in particular those related to carbohydrate hydrolysis, across different gut compartments and among the members of the bacterial community and the host itself. We showed that the Labiotermes gut was dominated by members of the Firmicutes phylum, whose abundance gradually decreased towards the posterior segments of the hindgut, in favour of Bacteroidetes, Proteobacteria and Verrucomicrobia. Contrary to expectations, we observed that L. labralis gut microbes expressed a high diversity of carbohydrate active enzymes involved in cellulose and hemicelluloses degradation, making the soil-feeding termite gut a unique reservoir of lignocellulolytic enzymes with considerable biotechnological potential. We also evidenced that the host cellulases have different phylogenetic origins and structures, which is possibly translated into their different specificities towards cellulose. From an ecological perspective, we could speculate that the capacity to feed on distinct polymorphs of cellulose retained in soil might have enabled this termite species to widely colonise the different habitats of the Amazon basin. CONCLUSIONS Our study provides interesting insights into the distribution of the hydrolytic potential of the highly compartmentalised higher termite gut. The large number of expressed enzymes targeting the different lignocellulose components make the Labiotermes worker gut a relevant lignocellulose-valorising model to mimic by biomass conversion industries.
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Affiliation(s)
- Martyna Marynowska
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422, Belvaux, Luxembourg.,Evolutionary Biology and Ecology, Université Libre de Bruxelles, 50 Avenue F.D. Roosevelt, B-1050, Brussels, Belgium
| | - David Sillam-Dussès
- University Sorbonne Paris Nord, Laboratory of Experimental and Comparative Ethology, LEEC, UR 4443, F-93430, Villetaneuse, France
| | - Boris Untereiner
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422, Belvaux, Luxembourg
| | - Dominika Klimek
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422, Belvaux, Luxembourg
| | - Xavier Goux
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422, Belvaux, Luxembourg
| | - Piotr Gawron
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue du Swing, L-4367, Belvaux, Luxembourg
| | - Yves Roisin
- Evolutionary Biology and Ecology, Université Libre de Bruxelles, 50 Avenue F.D. Roosevelt, B-1050, Brussels, Belgium
| | - Philippe Delfosse
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422, Belvaux, Luxembourg.,Vice-Rectorate for Research, University of Luxembourg, 2 Avenue Des Hauts-Fourneaux, L-4365, Esch-Sur-Alzette, Luxembourg
| | - Magdalena Calusinska
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422, Belvaux, Luxembourg.
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11
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Zhao H, Karppi J, Nguyen TTM, Bellemare A, Tsang A, Master E, Tenkanen M. Characterization of a novel AA3_1 xylooligosaccharide dehydrogenase from Thermothelomyces myriococcoides CBS 398.93. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:135. [PMID: 36476312 PMCID: PMC9730589 DOI: 10.1186/s13068-022-02231-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/17/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND The Carbohydrate-Active enZymes (CAZy) auxiliary activity family 3 (AA3) comprises flavin adenine dinucleotide-dependent (FAD) oxidoreductases from the glucose-methanol-choline (GMC) family, which play auxiliary roles in lignocellulose conversion. The AA3 subfamily 1 predominantly consists of cellobiose dehydrogenases (CDHs) that typically comprise a dehydrogenase domain, a cytochrome domain, and a carbohydrate-binding module from family 1 (CBM1). RESULTS In this work, an AA3_1 gene from T. myriococcoides CBS 398.93 encoding only a GMC dehydrogenase domain was expressed in Aspergillus niger. Like previously characterized CDHs, this enzyme (TmXdhA) predominantly accepts linear saccharides with β-(1 → 4) linkage and targets the hydroxyl on the reducing anomeric carbon. TmXdhA was distinguished, however, by its preferential activity towards xylooligosaccharides over cellooligosaccharides. Amino acid sequence analysis showed that TmXdhA possesses a glutamine at the substrate-binding site rather than a threonine or serine that occupies this position in previously characterized CDHs, and structural models suggest the glutamine in TmXdhA could facilitate binding to pentose sugars. CONCLUSIONS The biochemical analysis of TmXdhA revealed a catalytic preference for xylooligosaccharide substrates. The modeled structure of TmXdhA provides a reference for the screening of oxidoreductases targeting xylooligosaccharides. We anticipate TmXdhA to be a good candidate for the conversion of xylooligosaccharides to added-value chemicals by its exceptional catalytic ability.
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Affiliation(s)
- Hongbo Zhao
- grid.7737.40000 0004 0410 2071Department of Food and Nutrition, University of Helsinki, Helsinki, Finland
| | - Johanna Karppi
- grid.7737.40000 0004 0410 2071Department of Food and Nutrition, University of Helsinki, Helsinki, Finland
| | - Thi Truc Minh Nguyen
- grid.410319.e0000 0004 1936 8630Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke Street West, Montreal, QC H4B 1R6 Canada
| | - Annie Bellemare
- grid.410319.e0000 0004 1936 8630Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke Street West, Montreal, QC H4B 1R6 Canada
| | - Adrian Tsang
- grid.410319.e0000 0004 1936 8630Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke Street West, Montreal, QC H4B 1R6 Canada
| | - Emma Master
- grid.5373.20000000108389418Department of Bioproducts and Biosystems, Aalto University, Espoo, Finland ,grid.17063.330000 0001 2157 2938Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON Canada
| | - Maija Tenkanen
- grid.7737.40000 0004 0410 2071Department of Food and Nutrition, University of Helsinki, Helsinki, Finland
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12
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Yan Z, Kang E, Zhang K, Hao Y, Wang X, Li Y, Li M, Wu H, Zhang X, Yan L, Zhang W, Li J, Yang A, Niu Y, Kang X. Asynchronous responses of microbial CAZymes genes and the net CO 2 exchange in alpine peatland following 5 years of continuous extreme drought events. ISME COMMUNICATIONS 2022; 2:115. [PMID: 37938678 PMCID: PMC9723601 DOI: 10.1038/s43705-022-00200-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/26/2022] [Accepted: 11/07/2022] [Indexed: 11/09/2023]
Abstract
Peatlands act as an important sink of carbon dioxide (CO2). Yet, they are highly sensitive to climate change, especially to extreme drought. The changes in the net ecosystem CO2 exchange (NEE) under extreme drought events, and the driving function of microbial enzymatic genes involved in soil organic matter (SOM) decomposition, are still unclear. Herein we investigated the effects of extreme drought events in different periods of plant growth season at Zoige peatland on NEE and microbial enzymatic genes of SOM decomposition after 5 years. The results showed that the NEE of peatland decreased significantly by 48% and 26% on average (n = 12, P < 0.05) under the early and midterm extreme drought, respectively. The microbial enzymatic genes abundance of SOM decomposition showed the same decreasing trend under early and midterm extreme drought, but an increasing trend under late extreme drought. The microbial community that contributes to these degradation genes mainly derives from Proteobacteria and Actinobacteria. NEE was mainly affected by soil hydrothermal factors and gross primary productivity but weakly correlated with SOM enzymatic decomposition genes. Soil microbial respiration showed a positive correlation with microbial enzymatic genes involved in the decomposition of labile carbon (n = 18, P < 0.05). This study provided new insights into the responses of the microbial decomposition potential of SOM and ecosystem CO2 sink function to extreme drought events in the alpine peatland.
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Affiliation(s)
- Zhongqing Yan
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Enze Kang
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Kerou Zhang
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Yanbin Hao
- College of Life Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Xiaodong Wang
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Yong Li
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Meng Li
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Haidong Wu
- Information Center of Ministry of Ecology and Environment, 100029, Beijing, China
| | - Xiaodong Zhang
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Liang Yan
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Wantong Zhang
- Sino-Danish Centre for Education and Research, University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Jie Li
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, 100101, Beijing, China
| | - Ao Yang
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China
| | - Yuechuan Niu
- College of Life Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Xiaoming Kang
- Wetland Research Center, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, 100091, Beijing, China.
- Sichuan Zoige Wetland Ecosystem Research Station, Tibetan Autonomous Prefecture of Aba, Ngawa, 624500, China.
- Beijing Key Laboratory of Wetland Services and Restoration, 100091, Beijing, China.
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Sai Preethi P, Hariharan NM, Vickram S, Rameshpathy M, Manikandan S, Subbaiya R, Karmegam N, Yadav V, Ravindran B, Chang SW, Kumar Awasthi M. Advances in bioremediation of emerging contaminants from industrial wastewater by oxidoreductase enzymes. BIORESOURCE TECHNOLOGY 2022; 359:127444. [PMID: 35691504 DOI: 10.1016/j.biortech.2022.127444] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/04/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
The bioremediation of emerging recalcitrant pollutants in wastewater via enzyme biotechnology has been evolving as cost-effective with an input of low-energy technological approach. However, the enzyme based bioremediation technology is still not fully developed at a commercial level. The oxidoreductases being the domineering biocatalysts are promising candidates for wastewater treatments. Henceforth, comprehending their global market and biotransformation efficacy is mandatory for establishing these techno-economic bio-enzymes in commercial scale. The biocatalytic strategy can be established as a combinatorial approach with existing treatment technology to achieve towering bioremediation and effective removal of emerging pollutants from wastewater. This review provides a novel insight on the toxicological xenobiotics released from industries such as paper and pulps, soap and detergents, pharmaceuticals, textiles, pesticides, explosives and aptitude of peroxidases, nitroreductase and cellobiose dehydrogenase in their bio-based treatment. Moreover, the review comprehensively covers environmental relevance of wastewater pollution and the critical challenges based on remediation achieved through biocatalysts for future prospectives.
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Affiliation(s)
- P Sai Preethi
- College of Natural Resources and Environment, Northwest A&F University, Taicheng Road 3# Shaanxi, Yangling 712100, China; Department of Biotechnology, Sree Sastha Institute of Engineering and Technology, Chembarambakkam - 600 123, Tamil Nadu, India
| | - N M Hariharan
- Department of Biotechnology, Sree Sastha Institute of Engineering and Technology, Chembarambakkam - 600 123, Tamil Nadu, India
| | - Sundaram Vickram
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai - 602 105, Tamil Nadu, India
| | - M Rameshpathy
- School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore - 632 014, Tamil Nadu, India
| | - S Manikandan
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai - 602 105, Tamil Nadu, India
| | - R Subbaiya
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box 21692, Kitwe, Zambia
| | - N Karmegam
- Department of Botany, Government Arts College (Autonomous), Salem 636 007, Tamil Nadu, India
| | - Vivek Yadav
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A & F University, Yangling 712100, China
| | - Balasubramani Ravindran
- Department of Environmental Energy and Engineering, Kyonggi University, Youngtong-Gu, Suwon, Gyeonggi-Do, 16227, South Korea; Department of Medical Biotechnology and Integrative Physiology, Institute of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Thandalam, Chennai 602 105, Tamil Nadu, India
| | - S W Chang
- Department of Environmental Energy and Engineering, Kyonggi University, Youngtong-Gu, Suwon, Gyeonggi-Do, 16227, South Korea
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Taicheng Road 3# Shaanxi, Yangling 712100, China.
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14
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Engineering bio-interfaces for the direct electron transfer of Myriococcum thermophilum cellobiose dehydrogenase: Towards a mediator-less biosupercapacitor/biofuel cell hybrid. Biosens Bioelectron 2022; 210:114337. [PMID: 35537312 DOI: 10.1016/j.bios.2022.114337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/28/2022] [Accepted: 04/30/2022] [Indexed: 12/24/2022]
Abstract
Direct electron transfer (DET) of enzymes on electrode surfaces is highly desirable both for fundamental mechanistic studies and to achieve membrane- and mediator-less bioenergy harvesting. In this report, we describe the preparation and comprehensive structural and electrochemical characterization of a three-dimensional (3D) graphene-based carbon electrode, onto which the two-domain redox enzyme Myriococcum thermophilum cellobiose dehydrogenase (MtCDH) is immobilized. The electrode is prepared by an entirely novel method, which combines in a single step electrochemical reduction of graphene oxide (GO) and simultaneous electrodeposition of positively charged polyethylenimine (PEI), resulting in a well dispersed MtCDH surface. The resulting MtCDH bio-interface was characterized structurally in detail, optimized, and found to exhibit a DET maximum current density of 7.7 ± 0.9 μA cm-2 and a half-lifetime of 48 h for glucose oxidation, attributed to favorable MtCDH surface orientation. A dual, entirely DET-based enzymatic biofuel cell (EBFC) was constructed with a MtCDH bioanode and a Myrothecium verrucaria bilirubin oxidase (MvBOD) biocathode. The EBFC delivers a maximum power density (Pmax) of 7.6 ± 1.3 μW cm-2, an open-circuit voltage (OCV) of 0.60 V, and an operational lifetime over seven days, which exceeds most reported CDH based DET-type EBFCs. A biosupercapacitor/EBFC hybrid was also constructed and found to register maximum power densities 62 and 43 times higher than single glucose/air and lactose/air EBFCs, respectively. This hybrid also shows excellent operational stability with self-charging/discharging over at least 500 cycles.
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15
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Jing M, Xu X, Peng J, Li C, Zhang H, Lian C, Chen Y, Shen Z, Chen C. Comparative Genomics of Three Aspergillus Strains Reveals Insights into Endophytic Lifestyle and Endophyte-Induced Plant Growth Promotion. J Fungi (Basel) 2022; 8:jof8070690. [PMID: 35887447 PMCID: PMC9323082 DOI: 10.3390/jof8070690] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/19/2022] [Accepted: 06/28/2022] [Indexed: 02/04/2023] Open
Abstract
Aspergillus includes both plant pathogenic and beneficial fungi. Although endophytes beneficial to plants have high potential for plant growth promotion and improving stress tolerance, studies on endophytic lifestyles and endophyte-plant interactions are still limited. Here, three endophytes belonging to Aspergillus, AS31, AS33, and AS42, were isolated. They could successfully colonize rice roots and significantly improved rice growth. The genomes of strains AS31, AS33, and AS42 were sequenced and compared with other Aspergillus species covering both pathogens and endophytes. The genomes of AS31, AS33, and AS42 were 36.8, 34.8, and 35.3 Mb, respectively. The endophytic genomes had more genes encoding carbohydrate-active enzymes (CAZymes) and small secreted proteins (SSPs) and secondary metabolism gene clusters involved in indole metabolism than the pathogens. In addition, these endophytes were able to improve Pi (phosphorus) accumulation and transport in rice by inducing the expression of Pi transport genes in rice. Specifically, inoculation with endophytes significantly increased Pi contents in roots at the early stage, while the Pi contents in inoculated shoots were significantly increased at the late stage. Our results not only provide important insights into endophyte-plant interactions but also provide strain and genome resources, paving the way for the agricultural application of Aspergillus endophytes.
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Affiliation(s)
- Minyu Jing
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
| | - Xihui Xu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
| | - Jing Peng
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
| | - Can Li
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
| | - Hanchao Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
| | - Chunlan Lian
- Asian Research Center for Bioresource and Environmental Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Midori-cho, Tokyo 188-0002, Japan;
| | - Yahua Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhenguo Shen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing 210095, China
- Correspondence: (Z.S.); (C.C.); Tel.: +86-2584396391 (C.C.)
| | - Chen Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; (M.J.); (X.X.); (J.P.); (C.L.); (H.Z.); (Y.C.)
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing 210095, China
- Correspondence: (Z.S.); (C.C.); Tel.: +86-2584396391 (C.C.)
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Protein engineering for electrochemical biosensors. Curr Opin Biotechnol 2022; 76:102751. [PMID: 35777077 DOI: 10.1016/j.copbio.2022.102751] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 05/14/2022] [Accepted: 06/02/2022] [Indexed: 11/23/2022]
Abstract
The development of electrochemical biosensors has gained tremendous attention. Protein engineering has been applied for enhancing properties of native redox enzymes, such as selectivity, sensitivity, and stability required for applicable biosensors. This review highlights recent advances of protein engineering to improve enzymatic catalysis of biosensors, facilitate electron transfer and enzyme immobilization, and construct allosteric protein biosensors. The pros and cons of different protein engineering strategies are briefly discussed, and perspectives are further provided.
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Deletion of AA9 Lytic Polysaccharide Monooxygenases Impacts A. nidulans Secretome and Growth on Lignocellulose. Microbiol Spectr 2022; 10:e0212521. [PMID: 35658600 PMCID: PMC9241910 DOI: 10.1128/spectrum.02125-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Lytic polysaccharide monooxygenases (LPMOs) are oxidative enzymes found in viruses, archaea, and bacteria as well as eukaryotes, such as fungi, algae and insects, actively contributing to the degradation of different polysaccharides. In Aspergillus nidulans, LPMOs from family AA9 (AnLPMO9s), along with an AA3 cellobiose dehydrogenase (AnCDH1), are cosecreted upon growth on crystalline cellulose and lignocellulosic substrates, indicating their role in the degradation of plant cell wall components. Functional analysis revealed that three target LPMO9s (AnLPMO9C, AnLPMO9F and AnLPMO9G) correspond to cellulose-active enzymes with distinct regioselectivity and activity on cellulose with different proportions of crystalline and amorphous regions. AnLPMO9s deletion and overexpression studies corroborate functional data. The abundantly secreted AnLPMO9F is a major component of the extracellular cellulolytic system, while AnLPMO9G was less abundant and constantly secreted, and acts preferentially on crystalline regions of cellulose, uniquely displaying activity on highly crystalline algae cellulose. Single or double deletion of AnLPMO9s resulted in about 25% reduction in fungal growth on sugarcane straw but not on Avicel, demonstrating the contribution of LPMO9s for the saprophytic fungal lifestyle relies on the degradation of complex lignocellulosic substrates. Although the deletion of AnCDH1 slightly reduced the cellulolytic activity, it did not affect fungal growth indicating the existence of alternative electron donors to LPMOs. Additionally, double or triple knockouts of these enzymes had no accumulative deleterious effect on the cellulolytic activity nor on fungal growth, regardless of the deleted gene. Overexpression of AnLPMO9s in a cellulose-induced secretome background confirmed the importance and applicability of AnLPMO9G to improve lignocellulose saccharification. IMPORTANCE Fungal lytic polysaccharide monooxygenases (LPMOs) are copper-dependent enzymes that boost plant biomass degradation in combination with glycoside hydrolases. Secretion of LPMO9s arsenal by Aspergillus nidulans is influenced by the substrate and time of induction. These findings along with the biochemical characterization of novel fungal LPMO9s have implications on our understanding of their concerted action, allowing rational engineering of fungal strains for biotechnological applications such as plant biomass degradation. Additionally, the role of oxidative players in fungal growth on plant biomass was evaluated by deletion and overexpression experiments using a model fungal system.
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Jayakumar K, Reichhart TM, Schulz C, Ludwig R, Felice AK, Leech D. An Oxygen Insensitive Amperometric Glucose Biosensor Based on an Engineered Cellobiose Dehydrogenase: Direct Versus Mediated Electron Transfer Responses. ChemElectroChem 2022. [DOI: 10.1002/celc.202200418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | - Roland Ludwig
- BOKU: Universitat fur Bodenkultur Wien Food Science and Technology IRELAND
| | | | - Donal Leech
- National University of Ireland Galway School of Chemistry & Ryan Institute University Rd Galway IRELAND
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Villalonga A, Sánchez A, Mayol B, Reviejo J, Villalonga R. Electrochemical biosensors for food bioprocess monitoring. Curr Opin Food Sci 2022. [DOI: 10.1016/j.cofs.2021.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Viehauser MC, Breslmayr E, Scheiblbrandner S, Schachinger F, Ma S, Ludwig R. A cytochrome b-glucose dehydrogenase chimeric enzyme capable of direct electron transfer. Biosens Bioelectron 2022; 196:113704. [PMID: 34695687 DOI: 10.1016/j.bios.2021.113704] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/06/2021] [Accepted: 10/10/2021] [Indexed: 02/05/2023]
Abstract
The development of third generation biosensors depends on the availability of direct electron transfer (DET) capable enzymes. A successful strategy is to fuse a cytochrome domain to an enzyme to fulfil the function of a built-in redox mediator between the catalytic center and the electrode. In this study, we fused the cytochrome domain of Neurospora crassa CDH IIA (NcCYT) N-terminally to glucose dehydrogenase from Glomerella cingulata (GcGDH) to generate the chimeric enzyme NcCYT-GcGDH in a large amount for further studies. Heterologous expression in P. pastoris and chromatographic purification resulted in 1.8 g of homogeneous chimeric enzyme. Biochemical and electrochemical characterization confirmed that the chimeric enzyme is catalytically active, able to perform interdomain electron transfer (IET) and direct electron transfer (DET) via the fused cytochrome domain. The midpoint redox potential of the fused b-type cytochrome is 91 mV vs. SHE at pH 6.5 and the specific current obtained on a porous graphite electrode is 2.3 μA cm-2. The high current obtained on this simple, unmodified electrode at a rather low redox potential is a promising starting point for further optimization. The high yield of NcCYT-GcGDH and its high specific activity supports the application of the chimeric enzyme in bioelectrocatalytic applications.
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Affiliation(s)
- Marie-Christin Viehauser
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Erik Breslmayr
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Stefan Scheiblbrandner
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Franziska Schachinger
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Su Ma
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria.
| | - Roland Ludwig
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
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21
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Schachinger F, Chang H, Scheiblbrandner S, Ludwig R. Amperometric Biosensors Based on Direct Electron Transfer Enzymes. Molecules 2021; 26:molecules26154525. [PMID: 34361678 PMCID: PMC8348568 DOI: 10.3390/molecules26154525] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/19/2021] [Accepted: 07/23/2021] [Indexed: 11/16/2022] Open
Abstract
The accurate determination of analyte concentrations with selective, fast, and robust methods is the key for process control, product analysis, environmental compliance, and medical applications. Enzyme-based biosensors meet these requirements to a high degree and can be operated with simple, cost efficient, and easy to use devices. This review focuses on enzymes capable of direct electron transfer (DET) to electrodes and also the electrode materials which can enable or enhance the DET type bioelectrocatalysis. It presents amperometric biosensors for the quantification of important medical, technical, and environmental analytes and it carves out the requirements for enzymes and electrode materials in DET-based third generation biosensors. This review critically surveys enzymes and biosensors for which DET has been reported. Single- or multi-cofactor enzymes featuring copper centers, hemes, FAD, FMN, or PQQ as prosthetic groups as well as fusion enzymes are presented. Nanomaterials, nanostructured electrodes, chemical surface modifications, and protein immobilization strategies are reviewed for their ability to support direct electrochemistry of enzymes. The combination of both biosensor elements-enzymes and electrodes-is evaluated by comparison of substrate specificity, current density, sensitivity, and the range of detection.
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22
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Sulej J, Jaszek M, Osińska-Jaroszuk M, Matuszewska A, Bancerz R, Janczarek M. Natural microbial polysaccharides as effective factors for modification of the catalytic properties of fungal cellobiose dehydrogenase. Arch Microbiol 2021; 203:4433-4448. [PMID: 34132850 PMCID: PMC8360876 DOI: 10.1007/s00203-021-02424-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 11/21/2022]
Abstract
Polysaccharides are biopolymers composed of simple sugars like glucose, galactose, mannose, fructose, etc. The major natural sources for the production of polysaccharides include plants and microorganisms. In the present work, four bacterial and two fungal polysaccharides (PS or EPS) were used for the modification and preservation of Pycnoporus sanguineus cellobiose dehydrogenase (CDH) activity. It was found that the presence of polysaccharide preparations clearly enhanced the stability of cellobiose dehydrogenase compared to the control value (4 °C). The highest stabilization effect was observed for CDH modified with Rh110EPS. Changes in the optimum pH in the samples of CDH incubated with the chosen polysaccharide modifiers were evidenced as well. The most significant effect was observed for Rh24EPS and Cu139PS (pH 3.5). Cyclic voltammetry used for the analysis of electrochemical parameters of modified CDH showed the highest peak values after 30 days of incubation with polysaccharides at 4 °C. In summary, natural polysaccharides seem to be an effective biotechnological tool for the modification of CDH activity to increase the possibilities of its practical applications in many fields of industry.
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Affiliation(s)
- Justyna Sulej
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland.
| | - Magdalena Jaszek
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Monika Osińska-Jaroszuk
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Anna Matuszewska
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Renata Bancerz
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Monika Janczarek
- Department of Genetics and Microbiology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Lublin, Poland
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23
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Geiss A, Reichhart TMB, Pejker B, Plattner E, Herzog PL, Schulz C, Ludwig R, Felice AKG, Haltrich D. Engineering the Turnover Stability of Cellobiose Dehydrogenase toward Long-Term Bioelectronic Applications. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2021; 9:7086-7100. [PMID: 34306835 PMCID: PMC8296668 DOI: 10.1021/acssuschemeng.1c01165] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 04/16/2021] [Indexed: 05/09/2023]
Abstract
Cellobiose dehydrogenase (CDH) is an attractive oxidoreductase for bioelectrochemical applications. Its two-domain structure allows the flavoheme enzyme to establish direct electron transfer to biosensor and biofuel cell electrodes. Yet, the application of CDH in these devices is impeded by its limited stability under turnover conditions. In this work, we aimed to improve the turnover stability of CDH by semirational, high-throughput enzyme engineering. We screened 13 736 colonies in a 96-well plate setup for improved turnover stability and selected 11 improved variants. Measures were taken to increase the reproducibility and robustness of the screening setup, and the statistical evaluation demonstrates the validity of the procedure. The selected CDH variants were expressed in shaking flasks and characterized in detail by biochemical and electrochemical methods. Two mechanisms contributing to turnover stability were found: (i) replacement of methionine side chains prone to oxidative damage and (ii) the reduction of oxygen reactivity achieved by an improved balance of the individual reaction rates in the two CDH domains. The engineered CDH variants hold promise for the application in continuous biosensors or biofuel cells, while the deduced mechanistic insights serve as a basis for future enzyme engineering approaches addressing the turnover stability of oxidoreductases in general.
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Affiliation(s)
- Andreas
F. Geiss
- Biocatalysis
and Biosensing Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse 18, 1190 Vienna, Austria
| | - Thomas M. B. Reichhart
- Biocatalysis
and Biosensing Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse 18, 1190 Vienna, Austria
- DirectSens
Biosensors GmbH, Am Rosenbühel
38, 3400 Klosterneuburg, Austria
| | - Barbara Pejker
- Biocatalysis
and Biosensing Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse 18, 1190 Vienna, Austria
| | - Esther Plattner
- DirectSens
Biosensors GmbH, Am Rosenbühel
38, 3400 Klosterneuburg, Austria
| | - Peter L. Herzog
- DirectSens
Biosensors GmbH, Am Rosenbühel
38, 3400 Klosterneuburg, Austria
| | - Christopher Schulz
- DirectSens
Biosensors GmbH, Am Rosenbühel
38, 3400 Klosterneuburg, Austria
| | - Roland Ludwig
- Biocatalysis
and Biosensing Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse 18, 1190 Vienna, Austria
- DirectSens
Biosensors GmbH, Am Rosenbühel
38, 3400 Klosterneuburg, Austria
| | - Alfons K. G. Felice
- DirectSens
Biosensors GmbH, Am Rosenbühel
38, 3400 Klosterneuburg, Austria
- E-mail: . Telephone: +436505000167
| | - Dietmar Haltrich
- Biocatalysis
and Biosensing Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse 18, 1190 Vienna, Austria
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24
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Chang H, Wohlschlager L, Csarman F, Ruff A, Schuhmann W, Scheiblbrandner S, Ludwig R. Real-Time Measurement of Cellobiose and Glucose Formation during Enzymatic Biomass Hydrolysis. Anal Chem 2021; 93:7732-7738. [PMID: 34014659 PMCID: PMC8173519 DOI: 10.1021/acs.analchem.1c01182] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Enzymatic hydrolysis
of lignocellulosic biomass for biofuel production
relies on complex multi-enzyme ensembles. Continuous and accurate
measurement of the released key products is crucial in optimizing
the industrial degradation process and also investigating the activity
and interaction between the involved enzymes and the insoluble substrate.
Amperometric biosensors have been applied to perform continuous cellobiose
measurements during the enzymatic hydrolysis of pure cellulose powders.
The oxygen-sensitive mediators used in these biosensors restricted
their function under physiological or industrial conditions. Also,
the combined measurements of the hydrolysis products cellobiose and
glucose require a high selectivity of the biorecognition elements.
We employed an [Os(2,2′-bipyridine)2Cl]Cl-modified
polymer and cellobiose dehydrogenase to fabricate a cellobiose biosensor,
which can accurately and specifically detect cellobiose even in the
presence of oxygen and the other main product glucose. Additionally,
a glucose biosensor was fabricated to simultaneously measure glucose
produced from cellobiose by β-glucosidases. The cellobiose and
glucose biosensors work at applied potentials of +0.25 and +0.45 V
versus Ag|AgCl (3 M KCl), respectively, and can selectively detect
their substrate. Both biosensors were used in combination to monitor
the hydrolysis of pure cellulose of low crystallinity or industrial
corncob samples. The obtained results correlate with the high-performance
liquid chromatography pulsed amperometric detection analysis and demonstrate
that neither oxygen nor the presence of redox-active compounds from
the lignin fraction of the corncob interferes with the measurements.
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Affiliation(s)
- Hucheng Chang
- Biocatalysis and Biosensor Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
| | - Lena Wohlschlager
- Biocatalysis and Biosensor Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
| | - Florian Csarman
- Biocatalysis and Biosensor Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
| | - Adrian Ruff
- Analytical Chemistry-Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | - Wolfgang Schuhmann
- Analytical Chemistry-Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | - Stefan Scheiblbrandner
- Biocatalysis and Biosensor Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
| | - Roland Ludwig
- Biocatalysis and Biosensor Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
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25
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Wang D, Li Y, Zheng Y, Hsieh YSY. Recent Advances in Screening Methods for the Functional Investigation of Lytic Polysaccharide Monooxygenases. Front Chem 2021; 9:653754. [PMID: 33912540 PMCID: PMC8072006 DOI: 10.3389/fchem.2021.653754] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 02/12/2021] [Indexed: 01/22/2023] Open
Abstract
Lytic polysaccharide monooxygenase (LPMO) is a newly discovered and widely studied enzyme in recent years. These enzymes play a key role in the depolymerization of sugar-based biopolymers (including cellulose, hemicellulose, chitin and starch), and have a positive significance for biomass conversion. LPMO is a copper-dependent enzyme that can oxidize and cleave glycosidic bonds in cellulose and other polysaccharides. Their mechanism of action depends on the correct coordination of copper ions in the active site. There are still difficulties in the analysis of LPMO activity, which often requires multiple methods to be used in concert. In this review, we discussed various LPMO activity analysis methods reported so far, including mature mass spectrometry, chromatography, labeling, and indirect measurements, and summarized the advantages, disadvantages and applicability of different methods.
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Affiliation(s)
- Damao Wang
- College of Food Science, Southwest University, Chongqing, China
| | - Yanping Li
- College of Food Science, Southwest University, Chongqing, China
| | - Yuting Zheng
- College of Food Science, Southwest University, Chongqing, China
| | - Yves S Y Hsieh
- Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, Royal Institute of Technology (KTH), AlbaNova University Centre, Stockholm, Sweden.,School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, Taiwan.,Genomics Research Center, Academia Sinica, Taipei, Taiwan
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26
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Wang H, Yang X, Wei S, Wang Y. Proteomic Analysis of Mycelial Exudates of Ustilaginoidea virens. Pathogens 2021; 10:pathogens10030364. [PMID: 33803797 PMCID: PMC8003167 DOI: 10.3390/pathogens10030364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/14/2021] [Accepted: 03/16/2021] [Indexed: 12/18/2022] Open
Abstract
Rice false smut (RFS) disease, which is caused by Ustilaginoidea virens, has been widespread all over the world in recent years, causing irreversible losses. Under artificial culture conditions, exudates will appear on colonies of U. virens during the growth of the hyphae. Exudation of droplets is a common feature in many fungi, but the functions of exudates are undetermined. As the executors of life functions, proteins can intuitively reflect the functions of exudates. Shotgun proteomics were used in this study. A total of 650 proteins were identified in the exudate of U. virens, and the raw data were made available via ProteomeXchange with the identifier PXD019861. There were 57 subcategories and 167 pathways annotated with Gene Ontology (GO) classification and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis, respectively. Through protein–protein interaction (PPI) network analysis, it was found that 20 proteins participated in the biosynthesis of secondary metabolites. Two separate PPI analyses were performed for carbon metabolism and microbial metabolism in diverse environments. After comparing and annotating the functions of proteins of the exudate, it was speculated that the exudate was involved in the construction and remodeling of the fungal cell wall. Pathogenicity, sporulation, and antioxidant effects might all be affected by the exudate.
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Affiliation(s)
- Haining Wang
- Department of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China;
| | - Xiaohe Yang
- Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences, Jiamusi 154007, China;
| | - Songhong Wei
- Department of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China;
- Correspondence: (S.W.); (Y.W.)
| | - Yan Wang
- Department of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China;
- Correspondence: (S.W.); (Y.W.)
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27
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Wang Z, Feng S, Rovira C, Wang B. How Oxygen Binding Enhances Long‐Range Electron Transfer: Lessons From Reduction of Lytic Polysaccharide Monooxygenases by Cellobiose Dehydrogenase. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhanfeng Wang
- State Key Laboratory of Structural Chemistry of Solid Surface and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Shishi Feng
- State Key Laboratory of Structural Chemistry of Solid Surface and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Carme Rovira
- Departament de Química Inorgànica i Orgànica & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona 08028 Barcelona Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA) Passeig Lluís Companys 08020 Barcelona Spain
| | - Binju Wang
- State Key Laboratory of Structural Chemistry of Solid Surface and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
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28
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Jagadeeswaran G, Veale L, Mort AJ. Do Lytic Polysaccharide Monooxygenases Aid in Plant Pathogenesis and Herbivory? TRENDS IN PLANT SCIENCE 2021; 26:142-155. [PMID: 33097402 DOI: 10.1016/j.tplants.2020.09.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 09/07/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
Lytic polysaccharide monooxygenases (LPMOs), copper-dependent enzymes mainly found in fungi, bacteria, and viruses, are responsible for enabling plant infection and degradation processes. Since their discovery 10 years ago, significant progress has been made in understanding the major role these enzymes play in biomass conversion. The recent discovery of additional LPMO families in fungi and oomycetes (AA16) as well as insects (AA15) strongly suggests that LPMOs might also be involved in biological processes such as overcoming plant defenses. In this review, we aim to give a comprehensive overview of the potential role of different LPMO families from the perspective of plant defense and their multiple implications in devising new strategies for achieving crop protection from plant pathogens and insect pests.
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Affiliation(s)
- Guru Jagadeeswaran
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Lawrie Veale
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Andrew J Mort
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK, 74078, USA.
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29
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Wohlschlager L, Csarman F, Chang H, Fitz E, Seiboth B, Ludwig R. Heterologous expression of Phanerochaete chrysosporium cellobiose dehydrogenase in Trichoderma reesei. Microb Cell Fact 2021; 20:2. [PMID: 33407462 PMCID: PMC7789494 DOI: 10.1186/s12934-020-01492-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/03/2020] [Indexed: 11/25/2022] Open
Abstract
Background Cellobiose dehydrogenase from Phanerochaete chrysosporium (PcCDH) is a key enzyme in lignocellulose depolymerization, biosensors and biofuel cells. For these applications, it should retain important molecular and catalytic properties when recombinantly expressed. While homologous expression is time-consuming and the prokaryote Escherichia coli is not suitable for expression of the two-domain flavocytochrome, the yeast Pichia pastoris is hyperglycosylating the enzyme. Fungal expression hosts like Aspergillus niger and Trichoderma reesei were successfully used to express CDH from the ascomycete Corynascus thermophilus. This study describes the expression of basidiomycetes PcCDH in T. reesei (PcCDHTr) and the detailed comparison of its molecular, catalytic and electrochemical properties in comparison with PcCDH expressed by P. chrysosporium and P. pastoris (PcCDHPp). Results PcCDHTr was recombinantly produced with a yield of 600 U L−1 after 4 days, which is fast compared to the secretion of the enzyme by P. chrysosporium. PcCDHTr and PcCDH were purified to homogeneity by two chromatographic steps. Both enzymes were comparatively characterized in terms of molecular and catalytic properties. The pH optima for electron acceptors are identical for PcCDHTr and PcCDH. The determined FAD cofactor occupancy of 70% for PcCDHTr is higher than for other recombinantly produced CDHs and its catalytic constants are in good accordance with those of PcCDH. Mass spectrometry showed high mannose-type N-glycans on PcCDH, but only single N-acetyl-d-glucosamine additions at the six potential N-glycosylation sites of PcCDHTr, which indicates the presence of an endo-N-acetyl-β-d-glucosaminidase in the supernatant. Conclusions Heterologous production of PcCDHTr is faster and the yield higher than secretion by P. chrysosporium. It also does not need a cellulose-based medium that impedes efficient production and purification of CDH by binding to the polysaccharide. The obtained high uniformity of PcCDHTr glycoforms will be very useful to investigate electron transfer characteristics in biosensors and biofuel cells, which are depending on the spatial restrictions inflicted by high-mannose N-glycan trees. The determined catalytic and electrochemical properties of PcCDHTr are very similar to those of PcCDH and the FAD cofactor occupancy is good, which advocates T. reesei as expression host for engineered PcCDH for biosensors and biofuel cells.
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Affiliation(s)
- Lena Wohlschlager
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190, Vienna, Austria
| | - Florian Csarman
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190, Vienna, Austria
| | - Hucheng Chang
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190, Vienna, Austria
| | - Elisabeth Fitz
- Research Division Biochemical Technology, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, 1060, Vienna, Austria
| | - Bernhard Seiboth
- Research Division Biochemical Technology, Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, 1060, Vienna, Austria
| | - Roland Ludwig
- Biocatalysis and Biosensing Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190, Vienna, Austria.
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30
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Ghosh S, Godoy L, Anchang KY, Achilonu CC, Gryzenhout M. Fungal Cellulases: Current Research and Future Challenges. Fungal Biol 2021. [DOI: 10.1007/978-3-030-85603-8_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Cohen R, Cohen Y, Mukha D, Yehezkeli O. Oxygen insensitive amperometric glucose biosensor based on FAD dependent glucose dehydrogenase co-entrapped with DCPIP or DCNQ in a polydopamine layer. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137477] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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32
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Yang J, Xu P, Long L, Ding S. Production of lactobionic acid using an immobilized cellobiose dehydrogenase/laccase system on magnetic chitosan spheres. Process Biochem 2021. [DOI: 10.1016/j.procbio.2020.09.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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33
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Bollella P, Boeva Z, Latonen RM, Kano K, Gorton L, Bobacka J. Highly sensitive and stable fructose self-powered biosensor based on a self-charging biosupercapacitor. Biosens Bioelectron 2020; 176:112909. [PMID: 33385803 DOI: 10.1016/j.bios.2020.112909] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/14/2020] [Accepted: 12/16/2020] [Indexed: 12/18/2022]
Abstract
Herein, we present an alternative approach to obtain a highly sensitive and stable self-powered biosensor that was used to detect D-fructose as proof of concept.In this platform, we perform a two-step process, viz. self-charging the biosupercapacitor for a constant time by using D-fructose as fuel and using the stored charge to realize the detection of D-fructose by performing several polarization curves at different D-fructose concentrations. The proposed BSC shows an instantaneous power density release of 17.6 mW cm-2 and 3.8 mW cm-2 in pulse mode and at constant load, respectively. Moreover, the power density achieved for the self-charging BSC in pulse mode or under constant load allows for an enhancement of the sensitivity of the device up to 10 times (3.82 ± 0.01 mW cm-2 mM-1, charging time = 70 min) compared to the BSC in continuous operation mode and 100 times compared to the normal enzymatic fuel cell. The platform can potentially be employed as a self-powered biosensor in food or biomedical applications.
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Affiliation(s)
- Paolo Bollella
- Laboratory of Molecular Science and Engineering, Faculty of Science and Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FIN-20500, Turku-Åbo, Finland
| | - Zhanna Boeva
- Laboratory of Molecular Science and Engineering, Faculty of Science and Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FIN-20500, Turku-Åbo, Finland
| | - Rose-Marie Latonen
- Laboratory of Molecular Science and Engineering, Faculty of Science and Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FIN-20500, Turku-Åbo, Finland
| | - Kenji Kano
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Lo Gorton
- Department of Analytical Chemistry/Biochemistry, Lund University, P.O. Box 124, 221 00, Lund, Sweden.
| | - Johan Bobacka
- Laboratory of Molecular Science and Engineering, Faculty of Science and Engineering, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FIN-20500, Turku-Åbo, Finland.
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34
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Direct Electrochemical Enzyme Electron Transfer on Electrodes Modified by Self-Assembled Molecular Monolayers. Catalysts 2020. [DOI: 10.3390/catal10121458] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Self-assembled molecular monolayers (SAMs) have long been recognized as crucial “bridges” between redox enzymes and solid electrode surfaces, on which the enzymes undergo direct electron transfer (DET)—for example, in enzymatic biofuel cells (EBFCs) and biosensors. SAMs possess a wide range of terminal groups that enable productive enzyme adsorption and fine-tuning in favorable orientations on the electrode. The tunneling distance and SAM chain length, and the contacting terminal SAM groups, are the most significant controlling factors in DET-type bioelectrocatalysis. In particular, SAM-modified nanostructured electrode materials have recently been extensively explored to improve the catalytic activity and stability of redox proteins immobilized on electrochemical surfaces. In this report, we present an overview of recent investigations of electrochemical enzyme DET processes on SAMs with a focus on single-crystal and nanoporous gold electrodes. Specifically, we consider the preparation and characterization methods of SAMs, as well as SAM applications in promoting interfacial electrochemical electron transfer of redox proteins and enzymes. The strategic selection of SAMs to accord with the properties of the core redox protein/enzymes is also highlighted.
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35
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Lienemann M. Molecular mechanisms of electron transfer employed by native proteins and biological-inorganic hybrid systems. Comput Struct Biotechnol J 2020; 19:206-213. [PMID: 33425252 PMCID: PMC7772364 DOI: 10.1016/j.csbj.2020.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 11/19/2022] Open
Abstract
Recent advances in enzymatic electrosynthesis of desired chemicals in biological-inorganic hybrid systems has generated interest because it can use renewable energy inputs and employs highly specific catalysts that are active at ambient conditions. However, the development of such innovative processes is currently limited by a deficient understanding of the molecular mechanisms involved in electrode-based electron transfer and biocatalysis. Mechanistic studies of non-electrosynthetic electron transferring proteins have provided a fundamental understanding of the processes that take place during enzymatic electrosynthesis. Thus, they may help explain how redox proteins stringently control the reduction potential of the transferred electron and efficiently transfer it to a specific electron acceptor. The redox sites at which electron donor oxidation and electron acceptor reduction take place are typically located in distant regions of the redox protein complex and are electrically connected by an array of closely spaced cofactors. These groups function as electron relay centers and are shielded from the surrounding environment by the electrically insulating apoporotein. In this matrix, electrons travel via electron tunneling, i.e. hopping between neighboring cofactors, over impressive distances of upto several nanometers and, as in the case of the Shewanella oneidensis Mtr electron conduit, traverse the bacterial cell wall to extracellular electron acceptors such as solid ferrihydrite. Here, the biochemical strategies of protein-based electron transfer are presented in order to provide a basis for future studies on the basis of which a more comprehensive understanding of the structural biology of enzymatic electrosynthesis may be attained.
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36
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Wang Z, Feng S, Rovira C, Wang B. How Oxygen Binding Enhances Long‐Range Electron Transfer: Lessons From Reduction of Lytic Polysaccharide Monooxygenases by Cellobiose Dehydrogenase. Angew Chem Int Ed Engl 2020; 60:2385-2392. [DOI: 10.1002/anie.202011408] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/05/2020] [Indexed: 02/02/2023]
Affiliation(s)
- Zhanfeng Wang
- State Key Laboratory of Structural Chemistry of Solid Surface and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Shishi Feng
- State Key Laboratory of Structural Chemistry of Solid Surface and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Carme Rovira
- Departament de Química Inorgànica i Orgànica & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona 08028 Barcelona Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA) Passeig Lluís Companys 08020 Barcelona Spain
| | - Binju Wang
- State Key Laboratory of Structural Chemistry of Solid Surface and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
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37
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Comparative Genomic Analysis of Dactylonectria torresensis Strains from Grapevine, Soil and Weed Highlights Potential Mechanisms in Pathogenicity and Endophytic Lifestyle. J Fungi (Basel) 2020; 6:jof6040255. [PMID: 33138048 PMCID: PMC7712071 DOI: 10.3390/jof6040255] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 01/19/2023] Open
Abstract
The soil-borne fungus Dactylonectria torresensis is the most common causal agent of black-foot disease in Europe. However, there is a lack of understanding on how this fungus can provoke plant symptoms. In this study, we sequenced, annotated and analyzed the genomes of three isolates of D. torresensis collected from asymptomatic vine, weed and soil. Sequenced genomes were further compared to those of 27 fungal species including root and aerial pathogens, white rot degraders, indoor biodeterioration agents, saprotrophs, dark septate endophytes and mycorrhiza. Strains of D. torresensis present genomes with between 64 and 65 Mbp and with up to 18,548 predicted genes for each strain. Average Nucleotide Identity (ANI) shows that strains are different according to genome contents. Clusters of orthologous groups were compared, and clusters of genes related to necroses were particularly detected in all strains of D. torresensis (necrosis inducing peptides and proteins, and ethylene inducing peptides) as well as several genes involved in resistance against fungicides frequently used in viticulture such as copper. Interestingly, an expanded high number of genes related to carbohydrate-active enzymes were detected in each Dactylonectria strain, especially those related to glycoside hydrolases that could be involved in penetration of plant tissues or pathogenicity. An increased number of candidate genes for CAZyme classes AA9 and AA3-1 supports the ability of strains to efficiently degrade plant material. High numbers of genes of D. torresensis related to secretome and small secreted proteins were further characterized. Moreover, the presence of several gene clusters such as fujikurin-like genes was detected and were normally found in Fusariumfujikuroi, that have been linked to fungal pathogenicity. The phenotypes of the three strains investigated showed further difference in light response. We found that Dactylonectria strains have an increased number of photoreceptor encoding genes and we showed sequence alterations. Altogether, the results highlight several gene clusters present in D. torresensis strains that could be linked to endophytic lifestyle, pathogenicity, plant maceration and degradation of plant tissues as well as adaptation to soil contaminated with metals and metalloids and light response.
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Gangwar R, Rasool S, Mishra S. Purified cellobiose dehydrogenase of Termitomyces sp. OE147 fuels cellulose degradation resulting in the release of reducing sugars. Prep Biochem Biotechnol 2020; 51:488-496. [PMID: 33063604 DOI: 10.1080/10826068.2020.1833343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Termitomyces sp. OE 147 is one of the active cellulose degraders in the ecosphere and produces large amount of cellobiose dehydrogenase (CDH) and β-glucosidases when cultivated on cellulose. In order to investigate its effect on cellulose, a highly purified preparation of CDH was obtained from the culture supernatant of the fungus cultivated on cellulose. A combination of ultrafiltration, ion-exchange and gel-filtration chromatography was used to purify CDH by ∼172-fold to a high specific activity of ∼324 U/mg protein on lactose which was used for routine measurement of enzyme activity. The enzyme displayed a pH optimum of 5.0 and stability between pH 5.0 and 8.0 with maximum catalytic efficiency (kcat/Km) of 397 mM-1 s-1 on cellobiose. Incubation of microcrystalline cellulose with the purified CDH led to production of reducing sugars which was accelerated by the addition of FeCl3 during the early stages of incubation. A mass spectrometric analysis revealed fragmentation products of cellulose which were concluded to be cellodextrins, sugars, and corresponding aldonic acids suggesting that CDH can release reducing sugars in the absence of externally added lytic polysaccharide monooxygenases. Polymerized products of glucose were also detected at low intensity.
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Affiliation(s)
- Rishabh Gangwar
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India.,School of Biotechnology, Shri Mata Vaishno Devi University, Katra, India
| | - Shafaq Rasool
- School of Biotechnology, Shri Mata Vaishno Devi University, Katra, India
| | - Saroj Mishra
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
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Ma C, Liu M, You C, Zhu Z. Engineering a diaphorase via directed evolution for enzymatic biofuel cell application. BIORESOUR BIOPROCESS 2020. [DOI: 10.1186/s40643-020-00311-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Abstract
Background
Diaphorase (DI) has received wide attention as the key anodic enzyme mediating the electron transfer and electric energy generation in enzymatic biofuel cells (EBFCs). Lowering the anodic pH may be a useful strategy for constructing high-performance in EBFCs. However, most DI suffered from the poor activity at low pHs. Therefore, it is necessary to modify the activity and its acidic tolerance to further improve the performance of the EBFC.
Results
This paper attempts to improve the enzyme activity of DI originated from Geobacillus stearothermophilus under acidic conditions through directed evolution. Three rounds of random mutagenesis by error-prone PCR of the GsDI gene followed by high-throughput screening allowed the identification of the mutant 3–8 (H37Q, S73T, F105L, S68T, G61S, D74V) exhibiting a 4- or 7-fold increase in the catalytic activity at pH 5.4 or 4.5 compared to that of the wild type. And the pH stability of mutant 3–8 was significantly better than that of wild type and showed a 1.3 times higher in the stability at pH 5.4. The EBFC anode equipped with 0.5 mg of mutant 3–8 achieved a maximum current of 40 μA at pH 5.4, much higher than that with the same loading of the wild type enzyme.
Conclusion
The GsDI has been improved in the specific activity and pH stability by directed evolution which leads to the improvement of the EBFC performance. Also, the enlarged catalytic channel of mutant and decreased B-factor may be beneficial for the activity and stability. These results suggest that this engineered DI will be a useful candidate for the construction of enhanced EBFCs.
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40
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Tuoriniemi J, Gorton L, Ludwig R, Safina G. Determination of the Distance Between the Cytochrome and Dehydrogenase Domains of Immobilized Cellobiose Dehydrogenase by Using Surface Plasmon Resonance with a Center of Mass Based Model. Anal Chem 2020; 92:2620-2627. [PMID: 31916434 PMCID: PMC7003987 DOI: 10.1021/acs.analchem.9b04490] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Changes
in the tertiary conformation of adsorbed biomolecules can
induce detectable shifts (Δθr) in the surface plasmon resonance (SPR) angle. Here it is shown
how to calculate the corresponding shifts in the adsorbate’s
center of mass (Δzavg) along the
sensing surface normal from the measured Δθr. The novel developed model was used for determining
the mean distance between the cytochrome (CYT) and flavodehydrogenase
(DH) domains of the enzyme cellobiose dehydrogenase (CDH) isolated
from the fungi Neurospora crassa, Corynascus thermophilus, and Myriococcum
thermophilum as a function of pH, [Ca2+], and substrate concentration. SPR confirmed the results from earlier
electrochemical and SAXS studies stating that the closed conformation,
where the two domains are in close vicinity, is stabilized by a lower
pH and an increased [Ca2+]. Interestingly, an increasing
substrate concentration in the absence of any electron acceptors stabilizes
the open conformation as the electrostatic repulsion due to the reaped
electrons pushes the DH and CYT domains apart. The accuracy of distance
determination was limited mostly by the random fluctuations between
replicate measurements, and it was possible to detect movements <1
nm of the domains with respect to each other. The results agreed with
calculations using already established models treating conformational
changes as contraction or expansion of the thickness of the adsorbate
layer (tprotein). Although the models
yielded equivalent results, in this case, the Δzavg-based method also works in situations, where the adsorbate’s
mass is not evenly distributed within the layer.
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Affiliation(s)
- Jani Tuoriniemi
- Department of Chemistry and Molecular Biology , University of Gothenburg , Kemigården 4 , 412 96 Gothenburg , Sweden
| | - Lo Gorton
- Department of Biochemistry and Structural Biology , Lund University , P.O. Box 124, 221 00 Lund , Sweden
| | - Roland Ludwig
- Department of Food Science and Technology , BOKU - University of Natural Resources and Life Sciences , Vienna, Muthgasse 18 , 1190 Vienna , Austria
| | - Gulnara Safina
- Department of Chemistry and Molecular Biology , University of Gothenburg , Kemigården 4 , 412 96 Gothenburg , Sweden.,Division of Biological Physics, Department of Physics , Chalmers University of Technology , Kemigården 1 , 412 96 Gothenburg , Sweden
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41
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Abrera AT, Chang H, Kracher D, Ludwig R, Haltrich D. Characterization of pyranose oxidase variants for bioelectrocatalytic applications. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1868:140335. [PMID: 31785381 PMCID: PMC6949865 DOI: 10.1016/j.bbapap.2019.140335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 10/30/2019] [Accepted: 11/25/2019] [Indexed: 11/28/2022]
Abstract
Pyranose oxidase (POx) catalyzes the oxidation of d-glucose to 2-ketoglucose with concurrent reduction of oxygen to H2O2. POx from Trametes ochracea (ToPOx) is known to react with alternative electron acceptors including 1,4-benzoquinone (1,4-BQ), 2,6-dichlorophenol indophenol (DCPIP), and the ferrocenium ion. In this study, enzyme variants with improved electron acceptor turnover and reduced oxygen turnover were characterized as potential anode biocatalysts. Pre-steady-state kinetics of the oxidative half-reaction of ToPOx variants T166R, Q448H, L545C, and L547R with these alternative electron acceptors were evaluated using stopped-flow spectrophotometry. Higher kinetic constants were observed as compared to the wild-type ToPOx for some of the variants. Subsequently, the variants were immobilized on glassy carbon electrodes. Cyclic voltammetry measurements were performed to measure the electrochemical responses of these variants with glucose as substrate in the presence of 1,4-BQ, DCPIP, or ferrocene methanol as redox mediators. High catalytic efficiencies (Imaxapp/KMapp) compared to the wild-type POx proved the potential of these variants for future bioelectrocatalytic applications, in biosensors or biofuel cells. Among the variants, L545C showed the most desirable properties as determined kinetically and electrochemically. Pyranose oxidase (POx) shows attractive features for bioelectrocatalysis. Trametes ochracea POx variant L545C is most promising for these applications. Rapid kinetics experiments give good predictions for performance on an electrode.
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Affiliation(s)
- Annabelle T Abrera
- Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, A-1190 Vienna, Austria; University of the Philippines Los Baños, College Laguna, Los Baños, Philippines
| | - Hucheng Chang
- Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, A-1190 Vienna, Austria
| | - Daniel Kracher
- Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, A-1190 Vienna, Austria
| | - Roland Ludwig
- Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, A-1190 Vienna, Austria
| | - Dietmar Haltrich
- Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences, A-1190 Vienna, Austria.
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42
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Wasilewski T, Kamysz W, Gębicki J. Bioelectronic tongue: Current status and perspectives. Biosens Bioelectron 2019; 150:111923. [PMID: 31787451 DOI: 10.1016/j.bios.2019.111923] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/20/2019] [Accepted: 11/25/2019] [Indexed: 12/15/2022]
Abstract
In the course of evolution, nature has endowed humans with systems for the recognition of a wide range of tastes with a sensitivity and selectivity which are indispensable for the evaluation of edibility and flavour attributes. Inspiration by a biological sense of taste has become a basis for the design of instruments, operation principles and parameters enabling to mimic the unique properties of their biological precursors. In response to the demand for fast, sensitive and selective techniques of flavouring analysis, devices belonging to the group of bioelectronic tongues (B-ETs) have been designed. They combine achievements of chemometric analysis employed for many years in electronic tongues (ETs), with unique properties of bio-inspired materials, such as natural taste receptors (TRs) regarding receptor/ligand affinity. Investigations of the efficiency of the prototype devices create new application possibilities and suggest successful implementation in real applications. With advances in the field of biotechnology, microfluidics and nanotechnologies, many exciting developments have been made in the design of B-ETs in the last five years or so. The presented characteristics of the recent design solutions, application possibilities, critical evaluation of potentialities and limitations as well as the outline of further development prospects related to B-ETs should contribute to the systematisation and expansion of our knowledge.
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Affiliation(s)
- Tomasz Wasilewski
- Medical University of Gdansk, Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Poland, Hallera 107, 80-416, Gdansk, Poland.
| | - Wojciech Kamysz
- Medical University of Gdansk, Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Poland, Hallera 107, 80-416, Gdansk, Poland
| | - Jacek Gębicki
- Gdańsk University of Technology, Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Narutowicza 11/12, 80-233, Gdańsk, Poland
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