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Castrosanto MA, Abrera AT, Manalo MN, Ghosh A. In silico evaluation of binding of phytochemicals from bayati ( Anamirta cocculus Linn) to the glutathione-s-transferase of Asian Corn Borer ( Ostrinia furnacalis Guenée). J Biomol Struct Dyn 2022; 41:2660-2666. [PMID: 35138221 DOI: 10.1080/07391102.2022.2036240] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Asian corn borer (ACB) is a destructive insect pest of corn and causes up to 80% yield reduction in the Philippines. Synthetic insecticides have been used to control ACB but they pose a risk to human health and the environment. The use of synergists increases insecticide effectiveness and decreases the frequency of insecticide application. In line with this principle, we performed in silico screening of phytochemicals from bayati against glutathione-s-transferase (GST), one of the important detoxifying enzymes of ACB. Homology modeling was done to generate an acceptable three-dimensional protein structure (OfGST). Through ensemble molecular docking, we found that three phytosterols (stigmasterol, lupeol, and gamma-sitosterol) from bayati have a higher binding affinity to OfGST than glutathione, its natural substrate. Molecular dynamics simulation revealed that lupeol and gamma-sitosterol have a greater stabilizing effect on OfGST than stigmasterol, as supported by the RMSD, radius of gyration, and SASA plots of all complexes.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Melvin A Castrosanto
- Institute of Chemistry, College of Arts and Sciences, University of the Philippines Los, Baños, Laguna, Philippines
| | - Annabelle T Abrera
- Institute of Chemistry, College of Arts and Sciences, University of the Philippines Los, Baños, Laguna, Philippines.,Computational Interdisciplinary Research Laboratories, University of the Philippines Los, Baños, Laguna, Philippines
| | - Marlon N Manalo
- Institute of Chemistry, College of Arts and Sciences, University of the Philippines Los, Baños, Laguna, Philippines.,Computational Interdisciplinary Research Laboratories, University of the Philippines Los, Baños, Laguna, Philippines
| | - Arabinda Ghosh
- Microbiology Division, Department of Botany, Gauhati University, Guwahati, Assam, India
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Abrera AT, Sützl L, Haltrich D. Pyranose oxidase: A versatile sugar oxidoreductase for bioelectrochemical applications. Bioelectrochemistry 2019; 132:107409. [PMID: 31821902 DOI: 10.1016/j.bioelechem.2019.107409] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 10/09/2019] [Accepted: 10/15/2019] [Indexed: 02/08/2023]
Abstract
Pyranose oxidase (POx) is an FAD-dependent oxidoreductase, and like glucose oxidase (GOx) it is a member of the glucose-methanol-choline (GMC) superfamily of oxidoreductases. POx oxidizes several monosaccharides including D-glucose, D-galactose, and D-xylose, while concurrently oxygen is reduced to hydrogen peroxide. In addition to this oxidase activity, POx shows pronounced activity with alternative electron acceptors that include various quinones or (complexed) metal ions. Even though POx in general shows properties that are more favourable than those of GOx (e.g., a considerably higher catalytic efficiency (kcat/Km) for D-glucose, significantly lower Michaelis constants Km for D-glucose, reactivity with both anomeric forms of D-glucose) it is much less frequently used for both biosensor and biofuel cell applications than GOx. POx has been applied in biosensing of D-glucose, D-galactose, and D-xylose, and in combination with α-glucosidase also maltose. An attractive application is in biosensors constructed for the measurement of 1,5-anhydro-D-glucitol, a recognised biomarker in diabetes. Bioelectrochemical applications of POx had been restricted to enzymes of fungal origin. The recent discovery and characterisation of POx from bacterial sources, which show properties that are very distinct from the fungal enzymes, might open new possibilities for further applications in bioelectrochemistry.
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Affiliation(s)
- Annabelle T Abrera
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU - University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190 Wien, Austria; University of the Philippines Los Baños, College Laguna, Philippines
| | - Leander Sützl
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU - University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190 Wien, Austria; Doctoral Programme BioToP - Biomolecular Technology of Proteins, BOKU - University of Natural Resources and Life Sciences Vienna, Muthgasse 18, A-1190 Wien, Austria
| | - Dietmar Haltrich
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU - University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190 Wien, Austria; Doctoral Programme BioToP - Biomolecular Technology of Proteins, BOKU - University of Natural Resources and Life Sciences Vienna, Muthgasse 18, A-1190 Wien, Austria.
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Abrera AT, Chang H, Kracher D, Ludwig R, Haltrich D. Characterization of pyranose oxidase variants for bioelectrocatalytic applications. Biochim Biophys Acta Proteins Proteom 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Sützl L, Laurent CVFP, Abrera AT, Schütz G, Ludwig R, Haltrich D. Multiplicity of enzymatic functions in the CAZy AA3 family. Appl Microbiol Biotechnol 2018; 102:2477-2492. [PMID: 29411063 PMCID: PMC5847212 DOI: 10.1007/s00253-018-8784-0] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/12/2018] [Accepted: 01/14/2018] [Indexed: 11/29/2022]
Abstract
The CAZy auxiliary activity family 3 (AA3) comprises enzymes from the glucose-methanol-choline (GMC) family of oxidoreductases, which assist the activity of other AA family enzymes via their reaction products or support the action of glycoside hydrolases in lignocellulose degradation. The AA3 family is further divided into four subfamilies, which include cellobiose dehydrogenase, glucose oxidoreductases, aryl-alcohol oxidase, alcohol (methanol) oxidase, and pyranose oxidoreductases. These different enzymes catalyze a wide variety of redox reactions with respect to substrates and co-substrates. The common feature of AA3 family members is the formation of key metabolites such as H2O2 or hydroquinones, which are required by other AA enzymes. The multiplicity of enzymatic functions in the AA3 family is reflected by the multigenicity of AA3 genes in fungi, which also depends on their lifestyle. We provide an overview of the phylogenetic, molecular, and catalytic properties of AA3 enzymes and discuss their interactions with other carbohydrate-active enzymes.
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Affiliation(s)
- Leander Sützl
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190, Wien, Austria
- Doctoral Programme BioToP-Biomolecular Technology of Proteins, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 18, A-1190, Wien, Austria
| | - Christophe V F P Laurent
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190, Wien, Austria
- Doctoral Programme BioToP-Biomolecular Technology of Proteins, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 18, A-1190, Wien, Austria
| | - Annabelle T Abrera
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190, Wien, Austria
- University of the Philippines Los Baños, College Laguna, Los Baños, Philippines
| | - Georg Schütz
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190, Wien, Austria
- Doctoral Programme BioToP-Biomolecular Technology of Proteins, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 18, A-1190, Wien, Austria
| | - Roland Ludwig
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190, Wien, Austria
- Doctoral Programme BioToP-Biomolecular Technology of Proteins, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 18, A-1190, Wien, Austria
| | - Dietmar Haltrich
- Food Biotechnology Laboratory, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 11, A-1190, Wien, Austria.
- Doctoral Programme BioToP-Biomolecular Technology of Proteins, BOKU-University of Natural Resources and Life Sciences Vienna, Muthgasse 18, A-1190, Wien, Austria.
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