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Meng DM, Li WJ, Shi LY, Lv YJ, Sun XQ, Hu JC, Fan ZC. Expression, purification and characterization of a recombinant antimicrobial peptide Hispidalin in Pichia pastoris. Protein Expr Purif 2019; 160:19-27. [DOI: 10.1016/j.pep.2019.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 03/17/2019] [Indexed: 10/27/2022]
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Meng DM, Lv YJ, Zhao JF, Liu QY, Shi LY, Wang JP, Yang YH, Fan ZC. Efficient production of a recombinant Venerupis philippinarum defensin (VpDef) in Pichia pastoris and characterization of its antibacterial activity and stability. Protein Expr Purif 2018. [PMID: 29524591 DOI: 10.1016/j.pep.2018.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
VpDef is a novel defensin isolated from the clam Venerupis philippinarum. Previously it was expressed in Escherichia coli; however, the E. coli-derived recombinant VpDef did not show effective antimicrobial activity against Staphyloccocus aureus or the Gram-negative bacteria tested. As such, the goal of this study was to design, express, and purify a recombinant VpDef (rVpDef) in Pichia pastoris and to determine its antibacterial potency and stability. A 6.9 KDa rVpDef was successfully expressed as a secreted peptide in P. pastoris, and the amount of rVpDef accumulation was shown to reach as high as approximate 60 μg per 1 ml of culture medium only after an initial optimization was performed. The purified rVpDef demonstrated a broad antibacterial spectrum and was active against six typical common bacteria, both Gram-positive and Gram-negative. A minimal inhibition concentration of as low as 50 μg/ml was observed for rVpDef against the growth of E. coli O157 (ATCC 35150). Moreover, rVpDef was tolerant to temperature shock and proteinase digestion and maintained a high stability over a relatively broad pH range. In addition, rVpDef had a low hemolytic activity against rabbit erythrocytes. Taken together, this study demonstrated that rVpDef could be produced in a large-scale manner in P. pastoris and has a good antibacterial activity and suitable stability. This is the first report on heterologous expression of a biologically active VpDef in P. pastoris, supporting its use for both research and application purposes.
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Affiliation(s)
- De-Mei Meng
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Institute of Health Biotechnology, International Collaborative Research Center for Health Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China; Key Laboratory of Industrial Fermentation Microbiology (Tianjin University of Science & Technology), Ministry of Education, Tianjin Key Lab of Industrial Microbiology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Yu-Jie Lv
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Institute of Health Biotechnology, International Collaborative Research Center for Health Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Jing-Fang Zhao
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Institute of Health Biotechnology, International Collaborative Research Center for Health Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Qing-Yan Liu
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Institute of Health Biotechnology, International Collaborative Research Center for Health Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Lin-Yue Shi
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Institute of Health Biotechnology, International Collaborative Research Center for Health Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Jun-Ping Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Institute of Health Biotechnology, International Collaborative Research Center for Health Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Yong-Hai Yang
- Tianjin Haifa Sea Food Industrial Development Co., LTD, People's Republic of China
| | - Zhen-Chuan Fan
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Institute of Health Biotechnology, International Collaborative Research Center for Health Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China; Obesita & Algaegen LLC, College Station, TX 77845, USA.
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