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Fang Z, Sun D, Gao J, Guo M, Sun L, Wang Y, Lıu Y, Wang R, Deng Q, Xu D, Gooneratne R. An Acylase from Shewanella Putrefaciens Presents a Vibrio Parahaemolyticus Acylhomoserine Lactone-Degrading Activity and Exhibits Temperature-, Ph- and Metal-Dependences. AAlim 2020. [DOI: 10.1556/066.2020.49.4.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Shewanella putrefaciens supernatant was found to increase the virulence factors of Vibrio parahaemolyticus by efficiently degrading its acylhomoserine lactone (AHL). To further reveal the regulation mechanism and its key degrading enzyme, a potential AHL-degrading enzyme acylase (Aac) from S. putrefaciens was cloned, and the influences of temperature, pH, protein modifiers, and metals on Aac were tested. Aac was significantly influenced by temperature and pH, and exhibited the highest AHL-degrading activity at temperatures of 37 °C and pH of 8. Mg2+ and Fe2+ can further increase the AHL-degrading activity. 10 mM EDTA inhibited its activity possibly by chelating the co-factors (metals) required for Aac activity. Tryptophan and arginine were identified as key components for Aac activity that are critical to its AHL-degrading activity. This study provides useful information on Aac and for V. parahaemolyticus control.
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Affiliation(s)
- Z. Fang
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - D. Sun
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - J. Gao
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - M. Guo
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - L. Sun
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - Y. Wang
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - Y. Lıu
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - R. Wang
- bCollege of Food Science and Engineering, Lingnan Normal University, Zhanjiang, 524048, China
| | - Q. Deng
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - D. Xu
- aCollege of Food Science and Technology, Guangdong Ocean University, Zhanjiang, 524048, China
| | - R. Gooneratne
- cDepartment of Wine, Food and Molecular Biosciences, Lincoln University, Lincoln, Canterbury, 7647, New Zealand
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