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Pang C, Liu S, Zhang G, Zhou J, Du G, Li J. Improving the catalytic efficiency of Pseudomonas aeruginosa lipoxygenase by semi-rational design. Enzyme Microb Technol 2023; 162:110120. [DOI: 10.1016/j.enzmictec.2022.110120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/30/2022] [Accepted: 09/01/2022] [Indexed: 10/14/2022]
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Improving Catalytic Activity and Thermal Stability of Methyl-Parathion Hydrolase for Degrading the Pesticide of Methyl-Parathion. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1155/2022/7355170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Pesticides are indispensable in today’s agriculture. Methyl-parathion hydrolase (MPH, E.C.3.1.8.1) could hydrolyze organophosphorus pesticides, including methyl-parathion. MPH could rehabilitate soil and water resources contaminated by organophosphorus pesticides. However, natural MPHs generally exhibited a low tolerance to high temperatures and low catalytic efficiency. In this study, we improved the catalytic efficiency toward methyl-parathion and the thermal stability of the MPH from Pseudomonas sp. WBC-3 through saturation mutagenesis and fusion with self-assembling amphipathic peptides (SAP). The experimental characterization showed that compared to the wild-type enzyme, the kcat/Km of the mutant T271S yielded by saturation mutagenesis was increased by 224.3% compared to the wild-type MPH. T50 and Tm of SAP3-MPH with an SAP fused at the N-terminus were increased by 6.2°C and 6.0°C, respectively. Compared to the wild-type enzyme, T271S fused with SAP3 at the N-terminus (SAP3-T271S) exhibited a 2.1-fold increase in kcat/Km without significantly affecting the thermal stability. The simultaneous improvement of the catalytic efficiency and thermal stability of MPH would be beneficial for its application in the degradation and detection of organophosphorus pesticides. Furthermore, our study provides a potential combination strategy for the design of the other enzyme preparations of pollutant degradation.
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Afanasenko E, Seifullina I, Martsinko E, Konup L, Fizer M, Gudzenko O, Borzova N. Supramolecular Salts of Fe(II)/Co(II)/Ni(II)/Cu(II)/Zn(II) 1,10‐Phenanthroline Cations and Similar Complex Tartratostannate(IV) Anions: From Structural Features to Antimicrobial Activity and Enzyme Activation. ChemistrySelect 2022. [DOI: 10.1002/slct.202200280] [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)
| | - Inna Seifullina
- I.I. Mechnikov Odessa National University 65082 Odessa Ukraine
| | - Elena Martsinko
- I.I. Mechnikov Odessa National University 65082 Odessa Ukraine
| | - Ludmila Konup
- National Scientific Centre “Institute of Viticulture and Winemaking N.A. V.E. Tairov” 40-year Victory street, 27 Tairove 65496 Ukraine
| | - Maksym Fizer
- Department of Organic Chemistry Faculty of Chemistry Uzhhorod National University Pidhirna Str. 46 Uzhhorod 88000 Ukraine
| | - Olena Gudzenko
- Zabolotny Institute of Microbiology and Virology National Academy of Sciences of Ukraine Akademika Zabolotnoho St., 154 Kyiv 03143 Ukraine
| | - Nataliya Borzova
- Zabolotny Institute of Microbiology and Virology National Academy of Sciences of Ukraine Akademika Zabolotnoho St., 154 Kyiv 03143 Ukraine
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