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Yasamut U, Thongheang K, Weechan A, Sornsuwan K, Juntit OA, Tayapiwatana C. Evaluating the ability of different chaperones in improving soluble expression of a triple-mutated human interferon gamma in Escherichia coli. J Biosci Bioeng 2024:S1389-1723(24)00168-3. [PMID: 38969548 DOI: 10.1016/j.jbiosc.2024.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 06/07/2024] [Accepted: 06/11/2024] [Indexed: 07/07/2024]
Abstract
Human interferon gamma (hIFN-γ) plays a pivotal role as a soluble cytokine with diverse functions in both innate and adaptive immunity. In a previous investigation, we pinpointed three critical amino acid residues, i.e., threonine (T) 27, phenylalanine (F) 29, and leucine (L) 30, on the IFN-γ structure, which are integral to the epitope recognized by anti-IFN-γ autoantibodies. It is crucial to impede the interaction between this epitope and autoantibodies for effective therapy in adult-onset immunodeficiency (AOID). However, the challenge arises from the diminished solubility of the T27AF29L30A mutant in Escherichia coli BL21(DE3). This study delves into a targeted strategy aimed at improving the soluble expression of IFN-γ T27AF29AL30A. This is achieved through the utilization of five chaperone plasmids: pG-KJE8, pKJE7, pGro7, pG-Tf2, and pTf16. These plasmids, encoding cytoplasmic chaperones, are co-expressed with the IFN-γ mutant in E. coli BL21(DE3), and we meticulously analyze the proteins in cell lysate and inclusion bodies using SDS-PAGE and Western blotting. Our findings reveal the remarkable efficacy of pG-KJE8, which houses cytoplasmic chaperones DnaK-DnaJ-GrpE and GroEL-GroES, in significantly enhancing the solubility of IFN-γ T27AF29AL30A. Importantly, this co-expression not only addresses solubility concerns but also preserves the functional dimerized structure, as confirmed by sandwich ELISA. This promising outcome signifies a significant step forward in developing biologic strategies for AOID.
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Affiliation(s)
- Umpa Yasamut
- Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand; Center of Biomolecular Therapy and Diagnostic, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand; Center of Innovative Immunodiagnostic Development, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Kanyarat Thongheang
- Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand; Center of Biomolecular Therapy and Diagnostic, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Anuwat Weechan
- Center of Biomolecular Therapy and Diagnostic, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Kanokporn Sornsuwan
- Center of Biomolecular Therapy and Diagnostic, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - On-Anong Juntit
- Center of Biomolecular Therapy and Diagnostic, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Chatchai Tayapiwatana
- Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand; Center of Biomolecular Therapy and Diagnostic, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand; Center of Innovative Immunodiagnostic Development, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand.
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Yan X, Hu S, Guan YX, Yao SJ. Coexpression of chaperonin GroEL/GroES markedly enhanced soluble and functional expression of recombinant human interferon-gamma in Escherichia coli. Appl Microbiol Biotechnol 2011; 93:1065-74. [DOI: 10.1007/s00253-011-3599-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 08/25/2011] [Accepted: 09/20/2011] [Indexed: 11/29/2022]
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Vandenbroeck K, Martens E, Alloza I. Multi-chaperone complexes regulate the folding of interferon-gamma in the endoplasmic reticulum. Cytokine 2006; 33:264-73. [PMID: 16574426 DOI: 10.1016/j.cyto.2006.02.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Revised: 01/18/2006] [Accepted: 02/07/2006] [Indexed: 11/19/2022]
Abstract
The quality control mechanisms directing the folding of cytokines in the endoplasmic reticulum (ER) are poorly understood. We have investigated ER chaperone usage by the cytokine interferon-gamma (IFN-gamma). ATP-depletion or inhibition of N-glycosylation was found to cause IFN-gamma to accumulate into detergent-insoluble aggregates in the ER. Six chaperones, GRP94, GRP78, ERp72, PDI, CaBP1/P5 and CRT were found to associate with IFN-gamma during its steady state folding. Interaction of the five first chaperones with IFN-gamma was regulated co-ordinately by ATP. These chaperones were recently reported to be part of a multi-chaperone complex involved in the folding of complex, multi-subunit proteins. Our data suggest that also proteins with a relatively simple quaternary structure such as cytokines may fold in association with this complex. In addition, we identified calreticulin as the major chaperone interacting with IFN-gamma, and the related class II cytokine interleukin-10, during heat-shock in vivo. IFN-gamma was maintained in a folding-competent form by calreticulin during heat-shock and released during subsequent recovery at 37 degrees C. This interaction was observed in both recombinant (CHO-F11) and natural producer cells (Jurkat, NK-92MI) of IFN-gamma. Since cytokines such as IFN-gamma and IL-10 are frequently produced in the course of inflammatory conditions associated with fever, the thermo-protective effect of calreticulin may constitute a previously unrecognized component of the cellular cytokine production machinery, of likely relevance in sustaining cytokine folding and secretion in pathophysiological conditions.
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Affiliation(s)
- Koen Vandenbroeck
- Applied Genomics Research Group, School of Pharmacy & Center for Cancer Research & Cell Biology (CCRCB), Queen's University of Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK.
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Vandenbroeck K, Alloza I, Brehmer D, Billiau A, Proost P, McFerran N, Rüdiger S, Walker B. The conserved helix C region in the superfamily of interferon-gamma /interleukin-10-related cytokines corresponds to a high-affinity binding site for the HSP70 chaperone DnaK. J Biol Chem 2002; 277:25668-76. [PMID: 11970958 DOI: 10.1074/jbc.m202984200] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
HSP70 chaperones mediate protein folding by ATP-dependent interaction with short linear peptide segments that are exposed on unfolded proteins. The mode of action of the Escherichia coli homolog DnaK is representative of all HSP70 chaperones, including the endoplasmic reticulum variant BiP/GRP78. DnaK has been shown to be effective in assisting refolding of a wide variety of prokaryotic and eukaryotic proteins, including the alpha-helical homodimeric secretory cytokine interferon-gamma (IFN-gamma). We screened solid-phase peptide libraries from human and mouse IFN-gamma to identify DnaK-binding sites. Conserved DnaK-binding sites were identified in the N-terminal half of helix B and in the C-terminal half of helix C, both of which are located at the IFN-gamma dimer interface. Soluble peptides derived from helices B and C bound DnaK with high affinity in competition assays. No DnaK-binding sites were found in the loops connecting the alpha-helices. The helix C DnaK-binding site appears to be conserved in most members of the superfamily of interleukin (IL)-10-related cytokines that comprises, apart from IL-10 and IFN-gamma, a series of recently discovered small secretory proteins, including IL-19, IL-20, IL-22/IL-TIF, IL-24/MDA-7 (melanoma differentiation-associated gene), IL-26/AK155, and a number of viral IL-10 homologs. These cytokines belong to a relatively small group of homodimeric proteins with highly interdigitated interfaces that exhibit the strongly hydrophobic character of the interior core of a single-chain folded domain. We propose that binding of DnaK to helix C in the superfamily of IL-10-related cytokines may constitute the hallmark of a novel conserved regulatory mechanism in which HSP70-like chaperones assist in the formation of a hydrophobic dimeric "folding" interface.
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Affiliation(s)
- Koen Vandenbroeck
- Biomolecular Sciences Research Group, McClay Research Centre for Pharmaceutical Sciences, Queen's University of Belfast, United Kingdom.
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