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Sun J, Wang S, Wang X, Sun T, Zou L. Cloning and expression analyses of a cellobiohydrolase gene from Auricularia heimuer. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1665477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Jian Sun
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin, PR China
| | - Shixin Wang
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin, PR China
| | - Xutong Wang
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin, PR China
| | - Tingting Sun
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin, PR China
| | - Li Zou
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin, PR China
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Xu J, Zhong F, Zhang Y, Zhang J, Huo S, Lin H, Wang L, Cui D, Li X. Construction of Bacillus subtilis strain engineered for expression of porcine β-defensin-2/cecropin P1 fusion antimicrobial peptides and its growth-promoting effect and antimicrobial activity. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2016; 30:576-584. [PMID: 27383796 PMCID: PMC5394845 DOI: 10.5713/ajas.16.0207] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 05/19/2016] [Accepted: 06/30/2016] [Indexed: 01/31/2023]
Abstract
Objective To generate recombinant Bacillus subtilis (B. subtilis) engineered for expression of porcine β-defensin-2 (pBD-2) and cecropin P1 (CP1) fusion antimicrobial peptide and investigate their anti-bacterial activity in vitro and their growth-promoting and disease resisting activity in vivo. Methods The pBD-2 and CP1 fused gene was synthesized using the main codons of B. subtilis and inserted into plasmid pMK4 vector to construct their expression vector. The fusion peptide-expressing B. subtilis was constructed by transformation with the vector. The expressed fusion peptide was detected with Western blot. The antimicrobial activity of the expressed fusion peptide and the recovered pBD-2 and CP1 by enterokinase digestion in vitro was analyzed by the bacterial growth-inhibitory activity assay. To analyze the engineered B. subtilis on growth promotion and disease resistance, the weaned piglets were fed with basic diet supplemented with the recombinant B. subtilis. Then the piglets were challenged by enteropathogenic Escherichia coli (E. coli). The weight gain and diarrhea incidence of piglets were measured after challenge. Results The recombinant B. subtilis engineered for expression of pBD-2/CP1 fusion peptide was successfully constructed using the main codons of the B. subtilis. Both expressed pBD-2/CP1 fusion peptide and their individual peptides recovered from parental fusion peptide by enterokinase digestion possessed the antimicrobial activities to a variety of the bacteria, including gram-negative bacteria (E. coli, Salmonella typhimurium, and Haemophilus parasuis) and gram-positive bacteria (Staphylococcus aureus). Supplementing the engineered B. subtilis to the pig feed could significantly promote the piglet growth and reduced diarrhea incidence of the piglets. Conclusion The generated B. subtilis strain can efficiently express pBD-2/CP1 fusion antimicrobial peptide, the recovered pBD-2 and CP1 peptides possess potent antimicrobial activities to a variety of bacterial species in vitro. Supplementation of the engineered B. subtilis in pig feed obviously promote piglet growth and resistance to the colibacillosis.
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Affiliation(s)
- Jian Xu
- Department of Biotechnology, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.,Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Agricultural University of Hebei, Hebei Engineering and Technology Research Center of Veterinary Biotechnology, Baoding 071000, China
| | - Fei Zhong
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Agricultural University of Hebei, Hebei Engineering and Technology Research Center of Veterinary Biotechnology, Baoding 071000, China
| | - Yonghong Zhang
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Agricultural University of Hebei, Hebei Engineering and Technology Research Center of Veterinary Biotechnology, Baoding 071000, China
| | - Jianlou Zhang
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Agricultural University of Hebei, Hebei Engineering and Technology Research Center of Veterinary Biotechnology, Baoding 071000, China
| | - Shanshan Huo
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Agricultural University of Hebei, Hebei Engineering and Technology Research Center of Veterinary Biotechnology, Baoding 071000, China
| | - Hongyu Lin
- Department of Biotechnology, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Liyue Wang
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Agricultural University of Hebei, Hebei Engineering and Technology Research Center of Veterinary Biotechnology, Baoding 071000, China
| | - Dan Cui
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Agricultural University of Hebei, Hebei Engineering and Technology Research Center of Veterinary Biotechnology, Baoding 071000, China
| | - Xiujin Li
- Department of Biotechnology, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
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Saïda F. Overview on the Expression of Toxic Gene Products inEscherichia coli. ACTA ACUST UNITED AC 2007; Chapter 5:Unit 5.19. [DOI: 10.1002/0471140864.ps0519s50] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Fakhri Saïda
- University of California San Diego La Jolla California
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Yang J, Zhang W, Liu K, Jing S, Guo G, Luo P, Zou Q. Expression, purification, and characterization of recombinant human interleukin 24 in Escherichia coli. Protein Expr Purif 2007; 53:339-45. [PMID: 17292626 DOI: 10.1016/j.pep.2006.12.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2006] [Revised: 12/22/2006] [Accepted: 12/22/2006] [Indexed: 10/23/2022]
Abstract
Interleukin-24 (IL-24) can induce apoptosis of a broad range of tumor cells, and this function of IL-24 is independent of classic tumor suppressor genes, such as p53, Rb and p16. Here, we report the expression, purification and preparation of a recombinant IL-24 protein (rIL-24) without post-translational modifications, which may selectively induce apoptosis of tumor cells in vitro. We found that non-fusion rIL-24 was not able to be expressed by vectors pET11c, 28a, and 22b in Escherichia coli. To obtain recombinant non-fusion IL-24 protein, the encoding region for IL-24 was cloned between KpnI and BamHI in pET32a. The Trx (Thioredoxin)/IL-24 fusion proteins were expressed in the form of inclusion bodies in E. coli host strain BL21 (DE21). The expression level was more than 30% of total cell lysate. Inclusion bodies were disrupted, washed, and isolated at pH 9.0, and were completely dissolved in a buffer containing 2M urea at pH 9.0. After nickel ion metal affinity chromatography, gel filtration chromatography, and renaturation, the refolded fusion proteins with a purity of >96% were obtained. Trx/IL-24 proteins were digested by enterokinase (EK) to both Trx and rIL-24 fragments which then were separated by cation exchange chromatography. Cell proliferation experiments proved that the rIL-24 (98% purity) retains its cancer-selective apoptosis-inducing properties. This result suggested that the rIL-24 may have cancer therapeutic applications.
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Affiliation(s)
- Jun Yang
- Department of Clinical Microbiology and Immunology, Faculty of Medical Laboratory Science, Third Military Medical University, 30 Sha Ping Ba Gaotanyan Street, Chongqing 400038, PR China.
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