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Effects of high hydrostatic pressure or hydrophobic modification on thermal stability of xanthine oxidase. Enzyme Microb Technol 2017; 103:18-24. [DOI: 10.1016/j.enzmictec.2017.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 04/15/2017] [Accepted: 04/21/2017] [Indexed: 11/22/2022]
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Wang H, Lin P, Zhao S, Li S, Lu X, Liang H. Preparation of Magnetic Microsphere-Gold Nanoparticle-Immobilized Enzyme Batch Reactor and Its Application to Enzyme Inhibitor Screening in Natural Extracts by Capillary Electrophoresis. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600800] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hengshan Wang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Pingtan Lin
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Shulin Zhao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Shuting Li
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Xin Lu
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Hong Liang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
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Zhang L, Hu K, Li X, Zhao S. CE Method with Partial Filling Techniques for Screening of Xanthine Oxidase Inhibitor in Traditional Chinese Medicine. Chromatographia 2011. [DOI: 10.1007/s10337-010-1905-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Amini K, Sorouraddin MH, Rashidi MR. Activity and stability of rat liver xanthine oxidase in the presence of pyridine. CAN J CHEM 2011. [DOI: 10.1139/v10-136] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, rat liver xanthine oxidase activity and its thermostability in the presence of pyridine were investigated. The activity of the enzyme was determined by following the formation of uric acid spectrophotometrically. The thermal stability of the enzyme was studied in the presence of 0.0%–2.0% of pyridine in Sorenson’s buffer. Thermal stability parameters (half-life, inactivation constant, and activation energies for enzyme inactivation), thermodynamic constants (ΔH*, ΔS*, and ΔG*) and the kinetic parameters (Km and Vmax), were determined in pyridine-free and pyridine-containing buffer solution. A dramatic reduction was observed in xanthine oxidase activity in the presence of pyridine. However, the pyridine-treated enzyme showed a marked enhancement in thermal stability compared with the native enzyme. The ΔG values for the enzyme activity in the presence of pyridine were found to be about 1.5-fold larger than that calculated for the native enzyme, indicating that the enzyme becomes kinetically more stable in the presence of pyridine. The Km value for xanthine oxidase in the presence of 0.5% pyridine increased by 4.8-fold compared with the enzyme in the pyridine-free buffer solution; however, there was 1.8-fold reduction in the Vmax value in the hydro-organic solution compared with the enzyme activity in the buffer solution. As the stability of enzymes is one of the most difficult problems in protein chemistry, this thermostability property of xanthine oxidase could be of great value in developing novel strategies to improve and expand its application in various areas.
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Affiliation(s)
- Kaveh Amini
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 51666-16471, Iran
- Drug Applied Research Center, Research and Development Complex, Tabriz University of Medical Sciences, Tabriz, 51664-14766, Iran
| | - Mohammad-Hossein Sorouraddin
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 51666-16471, Iran
- Drug Applied Research Center, Research and Development Complex, Tabriz University of Medical Sciences, Tabriz, 51664-14766, Iran
| | - Mohammad-Reza Rashidi
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, 51666-16471, Iran
- Drug Applied Research Center, Research and Development Complex, Tabriz University of Medical Sciences, Tabriz, 51664-14766, Iran
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