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Cai Y, Zhou S, Stewart MJ, Zheng F, Zhan CG. Dimerization of human butyrylcholinesterase expressed in bacterium for development of a thermally stable bioscavenger of organophosphorus compounds. Chem Biol Interact 2019; 310:108756. [PMID: 31325422 DOI: 10.1016/j.cbi.2019.108756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/10/2019] [Accepted: 07/16/2019] [Indexed: 12/30/2022]
Abstract
Human butyrylcholinesterase (BChE) is a widely distributed plasma enzyme. For decades, numerous research efforts have been directed at engineering BChE as a bioscavenger of organophosphorus insecticides and chemical warfare nerve agents. However, it has been a grand challenge to cost-efficiently produce BChE in large-scale. Recently reported studies have successfully designed a truncated BChE mutant (with amino-acid substitutions on 47 residues that are far away from the catalytic site), denoted as BChE-M47 for convenience, which can be expressed in E. coli without loss of its catalytic activity. In this study, we aimed to dimerize the truncated BChE mutant protein expressed in a prokaryotic system (E. coli) in order to further improve its thermal stability by introducing a pair of cross-subunit disulfide bonds to the BChE-M47 structure. Specifically, the E377C/A516C mutations were designed and introduced to BChE-M47, and the obtained new protein entity, denoted as BChE-M48, with a pair of cross-subunit disulfide bonds indeed exists as a dimer with significantly improved thermostability and unaltered catalytic activity and reactivity compared to BChE-M47. These results provide a new strategy for optimizing protein stability for production in a cost-efficient prokaryotic system. Our enzyme, BChE-M48, has a half-life of almost one week at a 37°C, suggesting that it could be utilized as a highly stable bioscavenger of OP insecticides and chemical warfare nerve agents.
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Affiliation(s)
- Yingting Cai
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA; West China School of Pharmacy, Sichuan University, No. 17 People's South Road, Chengdu, 610041, PR China
| | - Shuo Zhou
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Madeline J Stewart
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Fang Zheng
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA.
| | - Chang-Guo Zhan
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA.
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Lin H, Yang J, Wang D, Hao G, Dong J, Wang Y, Yang W, Wu J, Zhan C, Yang G. Molecular insights into the mechanism of 4‐hydroxyphenylpyruvate dioxygenase inhibition: enzyme kinetics, X‐ray crystallography and computational simulations. FEBS J 2019; 286:975-990. [DOI: 10.1111/febs.14747] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 11/29/2018] [Accepted: 01/09/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Hong‐Yan Lin
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and Health Chemical Biology Center College of Chemistry Central China Normal University Wuhan China
| | - Jing‐Fang Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and Health Chemical Biology Center College of Chemistry Central China Normal University Wuhan China
| | - Da‐Wei Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and Health Chemical Biology Center College of Chemistry Central China Normal University Wuhan China
| | - Ge‐Fei Hao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and Health Chemical Biology Center College of Chemistry Central China Normal University Wuhan China
| | - Jiang‐Qing Dong
- MOE Key Laboratory of Protein Sciences Tsinghua‐Peking Center for Life Sciences School of Life Sciences Tsinghua University Beijing China
| | - Yu‐Xia Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and Health Chemical Biology Center College of Chemistry Central China Normal University Wuhan China
| | - Wen‐Chao Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and Health Chemical Biology Center College of Chemistry Central China Normal University Wuhan China
| | - Jia‐Wei Wu
- MOE Key Laboratory of Protein Sciences Tsinghua‐Peking Center for Life Sciences School of Life Sciences Tsinghua University Beijing China
| | - Chang‐Guo Zhan
- Department of Pharmaceutical Sciences College of Pharmacy University of Kentucky Lexington KY USA
| | - Guang‐Fu Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensor Technology and Health Chemical Biology Center College of Chemistry Central China Normal University Wuhan China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
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Yuan Y, Xu F, Yao J, Hu Y, Wang J, Zhao T, Zhou Y, Gao J. Cloning, expression and biochemical characterization of a GH1 β-glucosidase from Cellulosimicrobium cellulans. BIOCATAL BIOTRANSFOR 2017. [DOI: 10.1080/10242422.2017.1395415] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ye Yuan
- School of Biological Science and Technology, University of Jinan, Jinan, PR China
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun, PR China
| | - Fenghua Xu
- Department of Pharmaceutics, PLA General Hospital, Beijing, PR China
| | - Jianzhuang Yao
- School of Biological Science and Technology, University of Jinan, Jinan, PR China
| | - Yanho Hu
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun, PR China
| | - Jiao Wang
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun, PR China
| | - Tianjiao Zhao
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun, PR China
| | - Yifa Zhou
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun, PR China
| | - Juan Gao
- School of Biological Science and Technology, University of Jinan, Jinan, PR China
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Chen VP, Gao Y, Geng L, Stout MB, Jensen MD, Brimijoin S. Butyrylcholinesterase Deficiency Promotes Adipose Tissue Growth and Hepatic Lipid Accumulation in Male Mice on High-Fat Diet. Endocrinology 2016; 157:3086-95. [PMID: 27300766 PMCID: PMC4967128 DOI: 10.1210/en.2016-1166] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Despite numerous reports of relationships between weight gain and butyrylcholinesterase (BChE), this enzyme's role in the genesis of obesity remains unclear, but recent research points to strong links with ghrelin, the "hunger hormone." The availability of BChE knockout (KO) mice provides an opportunity to clarify the causal relationship between BChE and obesity onset. We now find that young KO mice have abnormally high plasma ghrelin levels that slowly decline during long-term high-fat feeding and ultimately drop below those in wild-type mice. On such a diet, the KO mice gained notably more weight, more white fat, and more hepatic fat than wild-type animals. In addition to a greater burden of hepatic triglycerides, the livers of these KO mice show distinctly higher levels of inflammatory markers. Finally, their energy expenditure proved to be lower than in wild-type mice despite similar activity levels and increased caloric intake. A gene transfer of mouse BChE with adeno-associated virus vector restored nearly all aspects of the normal phenotype. Our results indicate that BChE strongly affects fat metabolism, has an important impact on fat accumulation, and may be a promising tool for combating obesity.
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Affiliation(s)
- Vicky Ping Chen
- Department of Molecular Pharmacology and Experimental Therapeutics, Kogod Center on Aging, Mayo Clinic, and Minnesota Nutrition and Obesity Center, Rochester, Minnesota 55905
| | - Yang Gao
- Department of Molecular Pharmacology and Experimental Therapeutics, Kogod Center on Aging, Mayo Clinic, and Minnesota Nutrition and Obesity Center, Rochester, Minnesota 55905
| | - Liyi Geng
- Department of Molecular Pharmacology and Experimental Therapeutics, Kogod Center on Aging, Mayo Clinic, and Minnesota Nutrition and Obesity Center, Rochester, Minnesota 55905
| | - Michael B Stout
- Department of Molecular Pharmacology and Experimental Therapeutics, Kogod Center on Aging, Mayo Clinic, and Minnesota Nutrition and Obesity Center, Rochester, Minnesota 55905
| | - Michael D Jensen
- Department of Molecular Pharmacology and Experimental Therapeutics, Kogod Center on Aging, Mayo Clinic, and Minnesota Nutrition and Obesity Center, Rochester, Minnesota 55905
| | - Stephen Brimijoin
- Department of Molecular Pharmacology and Experimental Therapeutics, Kogod Center on Aging, Mayo Clinic, and Minnesota Nutrition and Obesity Center, Rochester, Minnesota 55905
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