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Liang MH, Zhou SS, Jiang JG. Construction, expression and characterization of a fusion protein HBscFv-IFNγ in Komagatella (Pichia) pastoris X33. Enzyme Microb Technol 2017; 102:74-81. [PMID: 28465064 DOI: 10.1016/j.enzmictec.2017.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 03/25/2017] [Accepted: 04/02/2017] [Indexed: 02/08/2023]
Abstract
HBscFv-IFNγ, a fusion protein constructed by fusing γ-interferon (IFNγ) with an antibody fragment HBscFv for the purpose of targeted delivery of the cytokine IFNγ, was designed in order to enhance its therapeutic efficacy through increasing its hepatoma localization. HBscFv and IFNγ were connected into HBscFv-IFNγ by the linker (Gly4Ser)3, and then the multicopy recombinant plasmids pPICZαA/(HBscFv-IFNγ)1,2,4 were constructed and transformed into Komagatella (Pichia) pastoris X33. The engineering strain X4, which had much higher copy number and could secretively express HBscFv-IFNγ, was screened from transformed X33 by qPCR. Results from SDS-PAGE, Western blotting and ELISA indicated that HBscFv-IFNγ displayed an excellent immunoreaction against HBsAg. The culture supernatant of X4 was purified by 14F7 affinity chromatography to obtain the fusion protein HBscFv-IFNγ in a purity of 95-98%. The HBscFv-IFNγ was able to bind 27.9% HBsAg in the serum of HBV transgenic mice, showing that the antibody of HBscFv-IFNγ has high binding affinity against HBsAg. The expressing of the recombinant HBscFv-IFNγ in P. pastoris provides a promising and inexpensive diagnostic reagent for preventing HBV infection.
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Affiliation(s)
- Ming-Hua Liang
- School of Biological Science & Engineering, South China University of Technology, Guangzhou, 510006, China; College of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Shi-Shui Zhou
- School of Biological Science & Engineering, South China University of Technology, Guangzhou, 510006, China.
| | - Jian-Guo Jiang
- College of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
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Improving the Secretory Production of the Heterologous Protein in Pichia pastoris by Focusing on Protein Folding. Appl Biochem Biotechnol 2014; 175:535-48. [DOI: 10.1007/s12010-014-1292-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Accepted: 10/09/2014] [Indexed: 01/07/2023]
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Liu B, Gong X, Chang S, Sun P, Wu J. Generation of mature Nα-terminal acetylated thymosin α 1 by cleavage of recombinant prothymosin α. ScientificWorldJournal 2013; 2013:387282. [PMID: 24288480 PMCID: PMC3830889 DOI: 10.1155/2013/387282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 09/16/2013] [Indexed: 01/13/2023] Open
Abstract
N(α)-terminal acetylation of peptides plays an important biological role but is rarely observed in prokaryotes. N(α)-terminal acetylated thymosin α1 (Tα1), a 28-amino-acid peptide, is an immune modifier that has been used in the clinic to treat hepatitis B and C virus (HBV/HCV) infections. We previously documented N(α)-terminal acetylation of recombinant prothymosin α (ProTα) in E. coli. Here we present a method for production of N(α)-acetylated Tα1 from recombinant ProTα. The recombinant ProTα was cleaved by human legumain expressed in Pichia pastoris to release Tα1 in vitro. The N(α)-acetylated Tα1 peptide was subsequently purified by reverse phase and cation exchange chromatography. Mass spectrometry indicated that the molecular mass of recombinant N(α)-acetylated Tα1 was 3108.79 in, which is identical to the mass of N(α)-acetylated Tα1 produced by total chemical synthesis. This mass corresponded to the nonacetylated Tα1 mass with a 42 Da increment. The retention time of recombinant N(α)-acetylated Tα1 and chemosynthetic N(α)-acetylated Tα1 were both 15.4 min in RP-high performance liquid chromatography (HPLC). These data support the use of an E. coli expression system for the production of recombinant human N(α)-acetylated Tα1 and also will provide the basis for the preparation of recombinant acetylated peptides in E. coli.
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Affiliation(s)
- Bo Liu
- Department of Microorganism Engineering, Beijing Institute of Biotechnology, 20 Dongdajie Street, Fengtai District, Beijing 100071, China
| | - Xin Gong
- Department of Microorganism Engineering, Beijing Institute of Biotechnology, 20 Dongdajie Street, Fengtai District, Beijing 100071, China
| | - Shaohong Chang
- Department of Microorganism Engineering, Beijing Institute of Biotechnology, 20 Dongdajie Street, Fengtai District, Beijing 100071, China
| | - Peng Sun
- Department of Microorganism Engineering, Beijing Institute of Biotechnology, 20 Dongdajie Street, Fengtai District, Beijing 100071, China
| | - Jun Wu
- Department of Microorganism Engineering, Beijing Institute of Biotechnology, 20 Dongdajie Street, Fengtai District, Beijing 100071, China
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Wen D, Foley SF, Hronowski XL, Gu S, Meier W. Discovery and Investigation of O-Xylosylation in Engineered Proteins Containing a (GGGGS)n Linker. Anal Chem 2013; 85:4805-12. [DOI: 10.1021/ac400596g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Dingyi Wen
- Analytical Biochemistry, Department
of Biologics Drug
Discovery, Biogen Idec, 12 Cambridge Center,
Cambridge, Massachusetts 02142, United States
| | - Susan F. Foley
- Analytical Biochemistry, Department
of Biologics Drug
Discovery, Biogen Idec, 12 Cambridge Center,
Cambridge, Massachusetts 02142, United States
| | - Xiaoping L. Hronowski
- Analytical Biochemistry, Department
of Biologics Drug
Discovery, Biogen Idec, 12 Cambridge Center,
Cambridge, Massachusetts 02142, United States
| | - Sheng Gu
- Analytical Biochemistry, Department
of Biologics Drug
Discovery, Biogen Idec, 12 Cambridge Center,
Cambridge, Massachusetts 02142, United States
| | - Werner Meier
- Analytical Biochemistry, Department
of Biologics Drug
Discovery, Biogen Idec, 12 Cambridge Center,
Cambridge, Massachusetts 02142, United States
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Li W, Song L, Wu S, Xue X, Zhang L, He L, Han W, Wang Q, Ling R, Zhang W, Yan Z, Zhang Y. Expression, purification and characterization of a novel soluble human thymosin alpha1 concatemer exhibited a stronger stimulation on mice lymphocytes proliferation and higher anti-tumor activity. Int J Biol Sci 2011; 7:618-28. [PMID: 21647330 PMCID: PMC3107470 DOI: 10.7150/ijbs.7.618] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Accepted: 05/04/2011] [Indexed: 12/29/2022] Open
Abstract
Thymosin alpha 1 (Tα1) has immunomodulatory and anti-tumor effects in patients and has been commercialized in worldwide. An innovative technique is therefore impending to achieve high-yield expression and purification of Tα1 to meet the increasing requirements for clinical applications. Tα1 can enhance T cells, dendritic cells and antibody responses, and also augment an anti-tumor immune response. In the current study, we developed a novel technique to produce Tα1 concatemer and investigated its capability in anti-tumor immunotherapy. We expressed the recombinant 2×Tα1 concatemer protein (Tα1② protein) in Escherichia coli. The purity of Tα1② was higher than 95% as assessed by HPLC analysis. In vitro, Tα1② could stimulate the proliferation of mouse splenic lymphocyte, and increase the apoptosis of tumor cell lines. In vivo, Tα1② significantly inhibited the tumor growth in B16 tumor-bearing mice. Compared with Tα1, the Tα1② is of more effective bioactivity than Tα1. The purified Tα1② is a promising substitute for synthetic Tα1 because of its potent anti-tumor effects. We concluded that the expression system for Tα1 concatemer was constructed successfully, which could serves as a highly efficient tool for the production of large quantities of the highly active protein.
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Affiliation(s)
- Weina Li
- The State Key Laboratory of Cancer Biology, Department of Biopharmaceutics, School of Pharmacy, Fourth Military Medical University, 710032 Xi'an, China
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Ren Y, Yao X, Dai H, Li S, Fang H, Chen H, Zhou C. Production of Nα-acetylated thymosin α1 in Escherichia coli. Microb Cell Fact 2011; 10:26. [PMID: 21513520 PMCID: PMC3103413 DOI: 10.1186/1475-2859-10-26] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 04/22/2011] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Thymosin α1 (Tα1), a 28-amino acid Nα-acetylated peptide, has a powerful general immunostimulating activity. Although biosynthesis is an attractive means of large-scale manufacture, to date, Tα1 can only be chemosynthesized because of two obstacles to its biosynthesis: the difficulties in expressing small peptides and obtaining Nα-acetylation. In this study, we describe a novel production process for Nα-acetylated Tα1 in Escherichia coli. RESULTS To obtain recombinant Nα-acetylated Tα1 efficiently, a fusion protein, Tα1-Intein, was constructed, in which Tα1 was fused to the N-terminus of the smallest mini-intein, Spl DnaX (136 amino acids long, from Spirulina platensis), and a His tag was added at the C-terminus. Because Tα1 was placed at the N-terminus of the Tα1-Intein fusion protein, Tα1 could be fully acetylated when the Tα1-Intein fusion protein was co-expressed with RimJ (a known prokaryotic Nα-acetyltransferase) in Escherichia coli. After purification by Ni-Sepharose affinity chromatography, the Tα1-Intein fusion protein was induced by the thiols β-mercaptoethanol or d,l-dithiothreitol, or by increasing the temperature, to release Tα1 through intein-mediated N-terminal cleavage. Under the optimal conditions, more than 90% of the Tα1-Intein fusion protein was thiolyzed, and 24.5 mg Tα1 was obtained from 1 L of culture media. The purity was 98% after a series of chromatographic purification steps. The molecular weight of recombinant Tα1 was determined to be 3107.44 Da by mass spectrometry, which was nearly identical to that of the synthetic version (3107.42 Da). The whole sequence of recombinant Tα1 was identified by tandem mass spectrometry and its N-terminal serine residue was shown to be acetylated. CONCLUSIONS The present data demonstrate that Nα-acetylated Tα1 can be efficiently produced in recombinant E. coli. This bioprocess could be used as an alternative to chemosynthesis for the production of Tα1. The described methodologies may also be helpful for the biosynthesis of similar peptides.
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Affiliation(s)
- Yuantao Ren
- Institute of Biotechnology, Academy of Military Medical Sciences, 20 DongDa Street, FengTai District, Beijing 100071, China
- School of Life Science and Technology, China Pharmaceutical University, 24 Tong JiaXiang, Nanjing 210009, China
| | - Xueqin Yao
- Institute of Neurosurgery, General Hospital of Beijing Military Command, 5 NanMenCang, Beijing 100700, China
| | - Hongmei Dai
- Institute of Biotechnology, Academy of Military Medical Sciences, 20 DongDa Street, FengTai District, Beijing 100071, China
| | - Shulong Li
- Institute of Biotechnology, Academy of Military Medical Sciences, 20 DongDa Street, FengTai District, Beijing 100071, China
| | - Hongqing Fang
- Institute of Biotechnology, Academy of Military Medical Sciences, 20 DongDa Street, FengTai District, Beijing 100071, China
| | - Huipeng Chen
- Institute of Biotechnology, Academy of Military Medical Sciences, 20 DongDa Street, FengTai District, Beijing 100071, China
| | - Changlin Zhou
- School of Life Science and Technology, China Pharmaceutical University, 24 Tong JiaXiang, Nanjing 210009, China
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Li J, Liu CH, Wang FS. Thymosin alpha 1: biological activities, applications and genetic engineering production. Peptides 2010; 31:2151-8. [PMID: 20699109 PMCID: PMC7115394 DOI: 10.1016/j.peptides.2010.07.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 07/27/2010] [Accepted: 07/27/2010] [Indexed: 12/16/2022]
Abstract
Thymosin alpha 1 (Tα1), a 28-amino acid peptide, was first described and characterized from calf thymuses in 1977. This peptide can enhance T-cell, dendritic cell (DC) and antibody responses, modulate cytokines and chemokines production and block steroid-induced apoptosis of thymocytes. Due to its pleiotropic biological activities, Tα1 has gained increasing interest in recent years and has been used for the treatment of various diseases in clinic. Accordingly, there is an increasing need for the production of this peptide. So far, Tα1 used in clinic is synthesized using solid phase peptide synthesis. Here, we summarize the genetic engineering methods to produce Tα1 using prokaryotic or eukaryotic expression systems. The effectiveness of these biological products in increasing the secretion of cytokines and in promoting lymphocyte proliferation were investigated in vitro studies. This opens the possibility for biotechnological production of Tα1 for the research and clinical applications.
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Affiliation(s)
- Juan Li
- Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Chun Hui Liu
- Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Feng Shan Wang
- Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
- National Glycoengineering Research Center, Shandong University, Jinan 250012, China
- Corresponding author at: Institute of Biochemical and Biotechnological Drug, National Glycoengineering Research Center, Shandong University, Jinan, Shandong, China. Tel.: +86 531 88382589; fax: +86 531 88382548.
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Bin F, Bu-feng L, Guang-yuan H. Synonymous codon usage bias and overexpression of a synthetic gene encoding Interferon α2b in yeast. Virol Sin 2008. [DOI: 10.1007/s12250-007-0026-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Abstract
The biotechnology industry has undergone rapid growth in recent years largely due to the development and success of protein-based therapeutics for a wide range of disorders. Similar to traditional pharmaceuticals, characterization of a therapeutic protein for its physicochemical properties, process monitoring and lot release is crucial. Electrophoresis in the slab-gel format has and continues to be a mainstay of the protein laboratory; and more recently, CE has begun to make significant inroads for protein analysis in industrial settings. This review focuses on the electrophoresis of proteins with an emphasis on protein-based therapeutics in the capillary, slab-gel and to a lesser extent, the microchip format. Reported applications of electrophoresis at several stages of the biopharmaceutical industry covering the period of 2000-2005 will be discussed.
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Affiliation(s)
- Michael J Little
- Boehringer Ingelheim, Canada, Research & Development, Laval, Quebec, Canada.
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