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Zhan Q, Shi C, Jiang Y, Gao X, Lin Y. Efficient splicing of the CPE intein derived from directed evolution of the Cryptococcus neoformans PRP8 intein. Acta Biochim Biophys Sin (Shanghai) 2023; 55:1310-1318. [PMID: 37489009 PMCID: PMC10448054 DOI: 10.3724/abbs.2023135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/19/2023] [Indexed: 07/26/2023] Open
Abstract
Intein-mediated protein splicing has been widely used in protein engineering; however, the splicing efficiency and extein specificity usually limit its further application. Thus, there is a demand for more general inteins that can overcome these limitations. Here, we study the trans-splicing of CPE intein obtained from the directed evolution of Cne PRP8, which shows that its splicing rate is ~29- fold higher than that of the wild-type. When the +1 residue of C-extein is changed to cysteine, CPE also shows high splicing activity. Faster association and higher affinity may contribute to the high splicing rate compared with wild-type intein. These findings have important implications for the future engineering of inteins and provide clues for fundamental studies of protein structure and folding.
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Affiliation(s)
- Qin Zhan
- College of Biological Science and Medical EngineeringDonghua UniversityShanghai201620China
| | - Changhua Shi
- College of Biological Science and Medical EngineeringDonghua UniversityShanghai201620China
| | - Yu Jiang
- College of Biological Science and Medical EngineeringDonghua UniversityShanghai201620China
| | - Xianling Gao
- Shandong Guoli Biotechnology Co.Ltd.Jinan250101China
| | - Ying Lin
- College of Biological Science and Medical EngineeringDonghua UniversityShanghai201620China
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Khaleghi R, Asad S. Heterologous expression of recombinant urate oxidase using the intein-mediated protein purification in Pichia pastoris. 3 Biotech 2021; 11:120. [PMID: 33628707 PMCID: PMC7870736 DOI: 10.1007/s13205-021-02670-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/28/2021] [Indexed: 10/22/2022] Open
Abstract
The potential of urate oxidase (uricase) for clinical use has been highlighted because of its role in lowering the blood uric acid levels for the treatment of tumor lysis syndrome. In the present study, the codon-optimized synthetic gene of Aspergillus flavus uricase was fused to the Mxe GyrA intein and chitin-binding domain. The construct was inserted into pPICZA and pPICZαA vectors and electroporated into Pichia pastoris GS115 for the cytosolic and secretory expression. Transformants were screened on gradients of Zeocin up to 2000 μg/ml to find multi-copy integrants. For both constructs, colonies with more resistance were screened for the highest uricase producers by enzyme assay. PCR analysis confirmed successful cassettes insertion into the genome and Mut + phenotype. The gene copy index was determined to be two and five for cytosolic and secretory strains, respectively. Productivity of the cytosolic and secretory strains was found to be 0.74 and 0.001 U/ml culture media in order while the cytosolic recombinant enzyme accounted for about 6% of total proteins. One-step purification of the expressed uricase was done with the aid of the chitin affinity column, followed by DTT induction for intein on-column cleavage. The yield of 40.8 mg/L and K m of 0.22 mM was obtained for intracellular expression. It seems that the intracellular production of uricase can indeed serve as an effective alternative to secretory expression. Moreover, this is the first report considering cytosolic production of uricase using the intein-mediated protein purification in the methylotrophic yeast, P. pastoris.
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Affiliation(s)
- Reihaneh Khaleghi
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Sedigheh Asad
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
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Ye B, Shen W, Shi M, Zhang Y, Xu C, Zhao Z. Intein-mediated backbone cyclization of entolimod confers enhanced radioprotective activity in mouse models. PeerJ 2018; 6:e5043. [PMID: 29938138 PMCID: PMC6011820 DOI: 10.7717/peerj.5043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 05/31/2018] [Indexed: 12/03/2022] Open
Abstract
Background Entolimod is a Salmonella enterica flagellin derivate. Previous work has demonstrated that entolimod effectively protects mice and non-human primates from ionizing radiation. However, it caused a “flu-like” syndrome after radioprotective and anticancer clinical application, indicating some type of immunogenicity and toxicity. Cyclization is commonly used to improve the in vivo stability and activity of peptides and proteins. Methods We designed and constructed cyclic entolimod using split Nostoc punctiforme DnaE intein with almost 100% cyclization efficiency. We adopted different strategies to purify the linear and circular entolimod due to their different topologies. Both of linear and circular entolimod were first purified by Ni-chelating affinity chromatography, and then the linear and circular entolimod were purified by size-exclusion and ion-exchange chromatography, respectively. Results The circular entolimod showed significantly increased both the in vitro NF-κB signaling and in vivo radioprotective activity in mice. Conclusion Our data indicates that circular entolimod might be a good candidate for further clinical investigation.
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Affiliation(s)
- Bingyu Ye
- College of Life Science, Henan Normal University, Xinxiang, China.,State Key Laboratory Cultivation Base for Cell Differentiation Regulation, College of Life Science, Henan Normal University, Xinxiang, China.,Beijing Institute of Biotechnology, Beijing, China
| | - Wenlong Shen
- Beijing Institute of Biotechnology, Beijing, China
| | - Minglei Shi
- Beijing Institute of Biotechnology, Beijing, China
| | - Yan Zhang
- Beijing Institute of Biotechnology, Beijing, China
| | - Cunshuan Xu
- College of Life Science, Henan Normal University, Xinxiang, China.,State Key Laboratory Cultivation Base for Cell Differentiation Regulation, College of Life Science, Henan Normal University, Xinxiang, China
| | - Zhihu Zhao
- Beijing Institute of Biotechnology, Beijing, China
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Pierre B, Labonte JW, Xiong T, Aoraha E, Williams A, Shah V, Chau E, Helal KY, Gray JJ, Kim JR. Molecular Determinants for Protein Stabilization by Insertional Fusion to a Thermophilic Host Protein. Chembiochem 2015; 16:2392-402. [DOI: 10.1002/cbic.201500310] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Brennal Pierre
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
| | - Jason W. Labonte
- Department of Chemical and Biomolecular Engineering; Johns Hopkins University; 3400 North Charles Street Baltimore MD 21218 USA
| | - Tina Xiong
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
- Department of Chemical and Biomolecular Engineering; Johns Hopkins University; 3400 North Charles Street Baltimore MD 21218 USA
| | - Edwin Aoraha
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
| | - Asher Williams
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
| | - Vandan Shah
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
| | - Edward Chau
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
| | - Kazi Yasin Helal
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
| | - Jeffrey J. Gray
- Department of Chemical and Biomolecular Engineering; Johns Hopkins University; 3400 North Charles Street Baltimore MD 21218 USA
| | - Jin Ryoun Kim
- Othmer-Jacobs Department of Chemical and Biomolecular Engineering; New York University; 6 MetroTech Center Brooklyn NY 11201 USA
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Ta DT, Redeker ES, Billen B, Reekmans G, Sikulu J, Noben JP, Guedens W, Adriaensens P. An efficient protocol towards site-specifically clickable nanobodies in high yield: cytoplasmic expression in Escherichia coli combined with intein-mediated protein ligation. Protein Eng Des Sel 2015; 28:351-63. [PMID: 26243885 DOI: 10.1093/protein/gzv032] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 07/01/2015] [Indexed: 11/13/2022] Open
Abstract
In this study, several expression strategies were investigated in order to develop a generic, highly productive and efficient protocol to produce nanobodies modified with a clickable alkyne function at their C-terminus via the intein-mediated protein ligation (IPL) technique. Hereto, the nanobody targeting the vascular cell adhesion molecule 1 (NbVCAM1) was used as a workhorse. The highlights of the protocol can be ascribed to a cytoplasmic expression of the nanobody-intein-chitin-binding domain fusion protein in the Escherichia coli SHuffle(®) T7 cells with a C-terminal extension, i.e. LEY, EFLEY or His6 spacer peptide, in the commonly used Luria-Bertani medium. The combination of these factors led to a high yield (up to 22 mg/l of culture) and nearly complete alkynation efficiency of the C-terminally modified nanobody via IPL. This yield can even be improved to ∼45 mg/l in the EnPresso(®) growth system but this method is more expensive and time-consuming. The resulting alkynated nanobodies retained excellent binding capacity towards the recombinant human VCAM1. The presented protocol benefits from time- and cost-effectiveness, which allows a feasible production up-scaling of generic alkynated nanobodies. The production of high quantities of site-specifically modified nanobodies paves the way to new biosurface applications that demand for a homogeneously oriented nanobody coupling. Prospectively, the alkynated nanobodies can be covalently coupled to a multitude of azide-containing counterparts, e.g. contrast labeling agents, particles or surfaces for numerous innovative applications.
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Affiliation(s)
- Duy Tien Ta
- Biomolecule Design Group, Institute for Materials Research (IMO), Hasselt University, Agoralaan-Building D, Diepenbeek BE-3590, Belgium Faculty of Food Technology and Biotechnology, Can Tho University of Technology, Can Tho, Vietnam
| | - Erik Steen Redeker
- Maastricht Science Programme, Maastricht University, Maastricht 6200 MD, The Netherlands
| | - Brecht Billen
- Biomolecule Design Group, Institute for Materials Research (IMO), Hasselt University, Agoralaan-Building D, Diepenbeek BE-3590, Belgium
| | - Gunter Reekmans
- Applied and Analytical Chemistry, Institute for Materials Research (IMO), Hasselt University, Agoralaan-Building D, Diepenbeek BE-3590, Belgium
| | - Josephine Sikulu
- Biomolecule Design Group, Institute for Materials Research (IMO), Hasselt University, Agoralaan-Building D, Diepenbeek BE-3590, Belgium
| | - Jean-Paul Noben
- Biomedical Research Institute (Biomed) and School of Life Sciences, Transnationale Universiteit Limburg, Hasselt University, Agoralaan-Building C, Diepenbeek BE-3590, Belgium
| | - Wanda Guedens
- Biomolecule Design Group, Institute for Materials Research (IMO), Hasselt University, Agoralaan-Building D, Diepenbeek BE-3590, Belgium
| | - Peter Adriaensens
- Biomolecule Design Group, Institute for Materials Research (IMO), Hasselt University, Agoralaan-Building D, Diepenbeek BE-3590, Belgium Applied and Analytical Chemistry, Institute for Materials Research (IMO), Hasselt University, Agoralaan-Building D, Diepenbeek BE-3590, Belgium
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