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Chen X, Ke H, Li W, Yin L, Chen W, Chen T, Wu Y, Qiu J, Feng W. Structural basis for the recognition of IFNAR1 by the humanized therapeutic monoclonal antibody QX006N for the treatment of systemic lupus erythematosus. Int J Biol Macromol 2024; 268:131721. [PMID: 38649079 DOI: 10.1016/j.ijbiomac.2024.131721] [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: 02/02/2024] [Revised: 04/10/2024] [Accepted: 04/18/2024] [Indexed: 04/25/2024]
Abstract
Interferon (IFN) alpha/beta receptor 1 (IFNAR1) is indispensable for antiviral responses and the immune regulation. Dysregulation of the IFNAR1-mediaetd signaling pathways leads to deleterious autoimmune diseases such as systemic lupus erythematosus (SLE). QX006N, a humanized therapeutic monoclonal antibody, specifically targets human IFNAR1 and is in the clinical trial phase for treating SLE, but the molecular mechanism underlying the QX006N-mediated recognition of IFNAR1 remains unclear. Here, we report the high neutralization activities of QX006N against IFNAR1-mediated signal transduction. Meanwhile, we determine the structures of the fragment antigen-binding domain (Fab) of QX006N (QX006N-Fab) and QX006N-Fab in complex with the subdomains 1-3 of IFNAR1 (IFNAR1-SD123) at 2.87 Å and 2.68 Å resolutions, respectively. In the structure of the QX006N-Fab/IFNAR1-SD123 complex, QX006N-Fab only recognizes the SD3 subdomain of IFNAR1 by the hydrophobic, hydrogen-bonding and electrostatic interactions. Compared with the structure of the IFN/IFNAR1/IFNAR2 complex, the binding of QX006N-Fab to IFNAR1-SD3 blocks its association with IFN due to steric hindrance, which inhibits the IFN/IFNAR1/IFNAR2 complex formation for signal transduction. The results of this study provide the structural evidence for the specific targeting of IFNAR1 by the therapeutic antibody QX006N and pave the way for the rational design of antibody drugs to combat IFNAR1-related autoimmune diseases.
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MESH Headings
- Receptor, Interferon alpha-beta/metabolism
- Receptor, Interferon alpha-beta/chemistry
- Lupus Erythematosus, Systemic/drug therapy
- Lupus Erythematosus, Systemic/immunology
- Humans
- Antibodies, Monoclonal, Humanized/chemistry
- Antibodies, Monoclonal, Humanized/therapeutic use
- Antibodies, Monoclonal, Humanized/pharmacology
- Protein Binding
- Models, Molecular
- Immunoglobulin Fab Fragments/chemistry
- Immunoglobulin Fab Fragments/immunology
- Signal Transduction/drug effects
- Structure-Activity Relationship
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Affiliation(s)
- Xiaorong Chen
- School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China; Key Laboratory of Biomacromolecules (CAS), National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Huimin Ke
- Key Laboratory of Biomacromolecules (CAS), National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China.
| | - Wei Li
- Key Laboratory of Biomacromolecules (CAS), National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Lu Yin
- Qyuns Therapeutics Co., Ltd., Taizhou 225300, China
| | - Wei Chen
- Qyuns Therapeutics Co., Ltd., Taizhou 225300, China
| | - Tao Chen
- Qyuns Therapeutics Co., Ltd., Taizhou 225300, China
| | - Yiliang Wu
- Qyuns Therapeutics Co., Ltd., Taizhou 225300, China
| | - Jiwan Qiu
- Qyuns Therapeutics Co., Ltd., Taizhou 225300, China.
| | - Wei Feng
- Key Laboratory of Biomacromolecules (CAS), National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
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2
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de Weerd NA, Vivian JP, Lim SS, Huang SUS, Hertzog PJ. Structural integrity with functional plasticity: what type I IFN receptor polymorphisms reveal. J Leukoc Biol 2021; 108:909-924. [PMID: 33448473 DOI: 10.1002/jlb.2mr0420-152r] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 03/21/2020] [Accepted: 03/26/2020] [Indexed: 12/13/2022] Open
Abstract
The type I IFNs activate an array of signaling pathways, which are initiated after IFNs bind their cognate receptors, IFNα/β receptor (IFNAR)1 and IFNAR2. These signals contribute to many aspects of human health including defense against pathogens, cancer immunosurveillance, and regulation of inflammation. How these cytokines interact with their receptors influences the quality of these signals. As such, the integrity of receptor structure is pivotal to maintaining human health and the response to immune stimuli. This review brings together genome wide association studies and clinical reports describing the association of nonsynonymous IFNAR1 and IFNAR2 polymorphisms with clinical disease, including altered susceptibility to viral and bacterial pathogens, autoimmune diseases, cancer, and adverse reactions to live-attenuated vaccines. We describe the amino acid substitutions or truncations induced by these polymorphisms and, using the knowledge of IFNAR conformational changes, IFNAR-IFN interfaces and overall structure-function relationship of the signaling complexes, we hypothesize the effect of these polymorphisms on receptor structure. That these predicted changes to IFNAR structure are associated with clinical manifestations of human disease, highlights the importance of IFNAR structural integrity to maintaining functional quality of these receptor-mediated responses. Type I IFNs are pivotal to innate immune responses and ultimately, to human health. Understanding the consequences of altered structure on the actions of these clinically significant cell receptors provides important information on the roles of IFNARs in health and disease.
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Affiliation(s)
- Nicole A de Weerd
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
| | - Julian P Vivian
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute and Australian Research Council Centre for Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - San S Lim
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
| | - Stephanie U-Shane Huang
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
| | - Paul J Hertzog
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
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3
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Zanin N, Viaris de Lesegno C, Lamaze C, Blouin CM. Interferon Receptor Trafficking and Signaling: Journey to the Cross Roads. Front Immunol 2021; 11:615603. [PMID: 33552080 PMCID: PMC7855707 DOI: 10.3389/fimmu.2020.615603] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 12/02/2020] [Indexed: 12/19/2022] Open
Abstract
Like most plasma membrane proteins, type I interferon (IFN) receptor (IFNAR) traffics from the outer surface to the inner compartments of the cell. Long considered as a passive means to simply control subunits availability at the plasma membrane, an array of new evidence establishes IFNAR endocytosis as an active contributor to the regulation of signal transduction triggered by IFN binding to IFNAR. During its complex journey initiated at the plasma membrane, the internalized IFNAR complex, i.e. IFNAR1 and IFNAR2 subunits, will experience post-translational modifications and recruit specific effectors. These finely tuned interactions will determine not only IFNAR subunits destiny (lysosomal degradation vs. plasma membrane recycling) but also the control of IFN-induced signal transduction. Finally, the IFNAR system perfectly illustrates the paradigm of the crosstalk between membrane trafficking and intracellular signaling. Investigating the complexity of IFN receptor intracellular routes is therefore necessary to reveal new insight into the role of IFNAR membrane dynamics in type I IFNs signaling selectivity and biological activity.
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Affiliation(s)
- Natacha Zanin
- NDORMS, The Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Christine Viaris de Lesegno
- Institut Curie-Centre de Recherche, PSL Research University, Membrane Dynamics and Mechanics of Intracellular Signalling Laboratory, Paris, France.,Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France.,Centre National de la Recherche Scientifique (CNRS), UMR 3666, Paris, France
| | - Christophe Lamaze
- Institut Curie-Centre de Recherche, PSL Research University, Membrane Dynamics and Mechanics of Intracellular Signalling Laboratory, Paris, France.,Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France.,Centre National de la Recherche Scientifique (CNRS), UMR 3666, Paris, France
| | - Cedric M Blouin
- Institut Curie-Centre de Recherche, PSL Research University, Membrane Dynamics and Mechanics of Intracellular Signalling Laboratory, Paris, France.,Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France.,Centre National de la Recherche Scientifique (CNRS), UMR 3666, Paris, France
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4
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Wieneke R, Tampé R. Multivalent Chelators for In Vivo Protein Labeling. Angew Chem Int Ed Engl 2019; 58:8278-8290. [PMID: 30919542 DOI: 10.1002/anie.201811293] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Indexed: 01/09/2023]
Abstract
With the advent of single-molecule methods, chemoselective and site-specific labeling of proteins evolved to become a central aspect in chemical biology as well as cell biology. Protein labeling demands high specificity, rapid as well as efficient conjugation, while maintaining low concentration and biocompatibility under physiological conditions. Generic methods that do not interfere with the function, dynamics, subcellular localization of proteins, and crosstalk with other factors are crucial to probe and image proteins in vitro and in living cells. Alternatives to enzyme-based tags or autofluorescent proteins are short peptide-based recognition tags. These tags provide high specificity, enhanced binding rates, bioorthogonality, and versatility. Here, we report on recent applications of multivalent chelator heads, recognizing oligohistidine-tagged proteins. The striking features of this system has facilitated the analysis of protein complexes by single-molecule approaches.
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Affiliation(s)
- Ralph Wieneke
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue Str. 9, 60438, Frankfurt/M., Germany
| | - Robert Tampé
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue Str. 9, 60438, Frankfurt/M., Germany
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5
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Wieneke R, Tampé R. Multivalent Chelators for In Vivo Protein Labeling. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ralph Wieneke
- Institute of BiochemistryBiocenterGoethe University Frankfurt Max-von-Laue Str. 9 60438 Frankfurt/M. Germany
| | - Robert Tampé
- Institute of BiochemistryBiocenterGoethe University Frankfurt Max-von-Laue Str. 9 60438 Frankfurt/M. Germany
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6
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Lee S, Son WS, Yang HB, Rajasekaran N, Kim SS, Hong S, Choi JS, Choi JY, Song K, Shin YK. A Glycoengineered Interferon-β Mutein (R27T) Generates Prolonged Signaling by an Altered Receptor-Binding Kinetics. Front Pharmacol 2019; 9:1568. [PMID: 30733680 PMCID: PMC6353837 DOI: 10.3389/fphar.2018.01568] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 12/24/2018] [Indexed: 12/15/2022] Open
Abstract
The glycoengineering approach is used to improve biophysical properties of protein-based drugs, but its direct impact on binding affinity and kinetic properties for the glycoengineered protein and its binding partner interaction is unclear. Type I interferon (IFN) receptors, composed of IFNAR1 and IFNAR2, have different binding strengths, and sequentially bind to IFN in the dominant direction, leading to activation of signals and induces a variety of biological effects. Here, we evaluated receptor-binding kinetics for each state of binary and ternary complex formation between recombinant human IFN-β-1a and the glycoengineered IFN-β mutein (R27T) using the heterodimeric Fc-fusion technology, and compared biological responses between them. Our results have provided evidence that the additional glycan of R27T, located at the binding interface of IFNAR2, destabilizes the interaction with IFNAR2 via steric hindrance, and simultaneously enhances the interaction with IFNAR1 by restricting the conformational freedom of R27T. Consequentially, altered receptor-binding kinetics of R27T in the ternary complex formation led to a substantial increase in strength and duration of biological responses such as prolonged signal activation and gene expression, contributing to enhanced anti-proliferative activity. In conclusion, our findings reveal N-glycan at residue 25 of R27T is a crucial regulator of receptor-binding kinetics that changes biological activities such as long-lasting activation. Thus, we believe that R27T may be clinically beneficial for patients with multiple sclerosis.
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Affiliation(s)
- Saehyung Lee
- Laboratory of Molecular Pathology and Cancer Genomics, Research Institute of Pharmaceutical Sciences and College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Woo Sung Son
- Department of Pharmacy, College of Pharmacy, CHA University, Pocheon, South Korea
| | - Ho Bin Yang
- Laboratory of Molecular Pathology and Cancer Genomics, Research Institute of Pharmaceutical Sciences and College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Nirmal Rajasekaran
- Laboratory of Molecular Pathology and Cancer Genomics, Research Institute of Pharmaceutical Sciences and College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Sung-Su Kim
- The Center for Companion Diagnostics, LOGONE Bio Convergence Research Foundation, Seoul, South Korea
| | - Sungyoul Hong
- Laboratory of Molecular Pathology and Cancer Genomics, Research Institute of Pharmaceutical Sciences and College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Joon-Seok Choi
- College of Pharmacy, Daegu Catholic University, Gyeongsan, South Korea
| | | | - Kyoung Song
- The Center for Companion Diagnostics, LOGONE Bio Convergence Research Foundation, Seoul, South Korea
| | - Young Kee Shin
- Laboratory of Molecular Pathology and Cancer Genomics, Research Institute of Pharmaceutical Sciences and College of Pharmacy, Seoul National University, Seoul, South Korea.,Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Suwon, South Korea
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7
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Recombinant Interferons Beta-1a and Beta-1b: Protein Structural Features and Problematic Issues with Identity Confirmation. Pharm Chem J 2018. [DOI: 10.1007/s11094-018-1892-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Zanin N, Blouin CM. [Endosomal control of intracellular signaling]. Biol Aujourdhui 2018; 212:45-51. [PMID: 30362455 DOI: 10.1051/jbio/2018023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Indexed: 11/14/2022]
Abstract
Membrane receptors control essential processes such as cell growth, adhesion, differentiation and metabolism through the activation of specific signaling pathways. Nowadays, these receptors are not only known to signal from the plasma membrane but also from intracellular compartments. Indeed, after being internalized with their ligands via different endocytic pathways, some membrane receptors can initiate signal only after reaching the sorting endosome where they associate with specific protein partners. This review illustrates how this spatio-temporal regulation of signal transduction can occur, with several examples, including interferon receptors which activate JAK/STAT signaling pathways. The literature presented here explains why this control of signaling pathways occuring at the endosomal level creates a higher degree of tuning for the affected cellular processes.
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Affiliation(s)
- Natacha Zanin
- The Kennedy Institute of Rheumatology, University of Oxford, OX3 7FY, Oxford, UK
| | - Cedric M Blouin
- Institut Curie - Centre de Recherche, PSL Research University, Membrane Dynamics and Mechanics of Intracellular Signaling Laboratory, 75248 Paris Cedex 05, France - Institut National de la Santé et de la Recherche Médicale (INSERM), U1143, Paris, France - Centre National de la Recherche Scientifique (CNRS), UMR 3666, Paris, France
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9
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Mastrangeli R, D'amici F, D'Acunto CW, Fiumi S, Rossi M, Terlizzese M, Palinsky W, Bierau H. A deamidated interferon-β variant binds to integrin αvβ3. Cytokine 2018; 104:38-41. [PMID: 29414325 DOI: 10.1016/j.cyto.2018.01.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 01/25/2018] [Accepted: 01/30/2018] [Indexed: 12/25/2022]
Abstract
Human type I interferons are a family of pleiotropic cytokines with antiviral, anti-proliferative and immunomodulatory activities. They signal through the same cell surface receptors IFNAR1 and IFNAR2 yet evoking markedly different physiological effects. One differentiating factor of interferon-beta (IFN-β) from other type I interferons is the presence of theAsn-Gly-Arg (NGR) sequence motif, which, upon deamidation, converts to Asp-Gly-Arg (DGR) and iso-Asp-Gly-Arg (iso-DGR) motifs. In other proteins, the NGR and iso-DGR motifs are reported as CD13- and αvβ3, αvβ5, αvβ6, αvβ8 and α5β1 integrin-binding motifs, respectively. The scope of this study was to perform exploratory surface plasmon resonance (SPR) experiments to assess the binding properties of a deamidated IFN-β variant to integrins. For this purpose, integrin αvβ3 was selected as a reference model within the iso-DGR- integrin binding members. The obtained results show that deamidated IFN-β binds integrin αvβ3 with nanomolar affinity and that the response was dependent on the deamidation extent. Based on these results, it can be expected that deamidated IFN-β also binds to other integrin family members that are able to bind to the iso-DGR binding motif. The novel binding properties could help elucidate specific IFN-β attributes that under physiological conditions may be modulated by the deamidation.
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Affiliation(s)
- Renato Mastrangeli
- Biotech Development Programme, CMC Science & Intelligence, Merck Serono S.p.A. (an affiliate of Merck KGaA, Darmstadt, Germany), Via Luigi Einaudi, 11, 00012 Guidonia Montecelio (Roma), Italy
| | - Fabio D'amici
- Pharmaceutical & Analytical Development Biotech Products, Merck Serono S.p.A. (an affiliate of Merck KGaA, Darmstadt, Germany), Via Luigi Einaudi, 11, 00012 Guidonia Montecelio (Roma), Italy
| | - Cosimo-Walter D'Acunto
- Pharmaceutical & Analytical Development Biotech Products, Merck Serono S.p.A. (an affiliate of Merck KGaA, Darmstadt, Germany), Via Luigi Einaudi, 11, 00012 Guidonia Montecelio (Roma), Italy
| | - Sabrina Fiumi
- Pharmaceutical & Analytical Development Biotech Products, Merck Serono S.p.A. (an affiliate of Merck KGaA, Darmstadt, Germany), Via Luigi Einaudi, 11, 00012 Guidonia Montecelio (Roma), Italy
| | - Mara Rossi
- Pharmaceutical & Analytical Development Biotech Products, Merck Serono S.p.A. (an affiliate of Merck KGaA, Darmstadt, Germany), Via Luigi Einaudi, 11, 00012 Guidonia Montecelio (Roma), Italy
| | - Mariagrazia Terlizzese
- Pharmaceutical & Analytical Development Biotech Products, Merck Serono S.p.A. (an affiliate of Merck KGaA, Darmstadt, Germany), Via Luigi Einaudi, 11, 00012 Guidonia Montecelio (Roma), Italy
| | - Wolf Palinsky
- Biotech Development Programme, Merck Biopharma (an affiliate of Merck KGaA, Darmstadt, Germany), Zone Industrielle de l'Ouriettaz, Aubonne 1170, Switzerland
| | - Horst Bierau
- Biotech Development Programme, CMC Science & Intelligence, Merck Serono S.p.A. (an affiliate of Merck KGaA, Darmstadt, Germany), Via Luigi Einaudi, 11, 00012 Guidonia Montecelio (Roma), Italy.
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10
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A proline deletion in IFNAR1 impairs IFN-signaling and underlies increased resistance to tuberculosis in humans. Nat Commun 2018; 9:85. [PMID: 29311663 PMCID: PMC5758831 DOI: 10.1038/s41467-017-02611-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 12/13/2017] [Indexed: 02/05/2023] Open
Abstract
Type I interferons (IFN), best known for their anti-viral functions, have been shown to impair host resistance to intracellular bacteria in mice. However, the precise role of type I IFN signaling in bacterial infection in humans is unclear. Here, we show that genetic variation in the human IFNAR1 gene is associated with decreased susceptibility to tuberculosis and an increased risk of viral hepatitis in Chinese populations. Receptor mutagenesis and cell signaling studies establish that the IFNAR1 mutation corresponding to a proline deletion in the hinge region of the membrane-proximal domain of IFNAR1 decreases the binding affinity of IFNAR1 to IFN-β, impeding type I IFN signaling. Our findings suggest that IFNAR1 signaling underlies an increased risk of tuberculosis in humans and reveals a function for the IFNAR1 inter-domain region in cytokine–cytokine receptor interaction and signal transduction. The role of type I interferons in bacterial infection is less clear than it is in viral infection. Here, the authors show that genetic variation of the human IFNAR1 gene is associated with decreased susceptibility to tuberculosis and identify a role for the IFNAR1 inter-domain region in the cytokine response.
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11
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Donovan ML, Schultz TE, Duke TJ, Blumenthal A. Type I Interferons in the Pathogenesis of Tuberculosis: Molecular Drivers and Immunological Consequences. Front Immunol 2017; 8:1633. [PMID: 29230217 PMCID: PMC5711827 DOI: 10.3389/fimmu.2017.01633] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 11/09/2017] [Indexed: 12/11/2022] Open
Abstract
Tuberculosis (TB) remains a major global health threat. Urgent needs in the fight against TB include improved and innovative treatment options for drug-sensitive and -resistant TB as well as reliable biological indicators that discriminate active from latent disease and enable monitoring of treatment success or failure. Prominent interferon (IFN) inducible gene signatures in TB patients and animal models of Mycobacterium tuberculosis infection have drawn significant attention to the roles of type I IFNs in the host response to mycobacterial infections. Here, we review recent developments in the understanding of the innate immune pathways that drive type I IFN responses in mycobacteria-infected host cells and the functional consequences for the host defense against M. tuberculosis, with a view that such insights might be exploited for the development of targeted host-directed immunotherapies and development of reliable biomarkers.
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Affiliation(s)
- Meg L Donovan
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Thomas E Schultz
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Taylor J Duke
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Antje Blumenthal
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
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12
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Li H, Sharma N, General IJ, Schreiber G, Bahar I. Dynamic Modulation of Binding Affinity as a Mechanism for Regulating Interferon Signaling. J Mol Biol 2017; 429:2571-2589. [PMID: 28648616 PMCID: PMC5545807 DOI: 10.1016/j.jmb.2017.06.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/15/2017] [Accepted: 06/16/2017] [Indexed: 12/22/2022]
Abstract
How structural dynamics affects cytokine signaling is under debate. Here, we investigated the dynamics of the type I interferon (IFN) receptor, IFNAR1, and its effect on signaling upon binding IFN and IFNAR2 using a combination of structure-based mechanistic studies, in situ binding, and gene induction assays. Our study reveals that IFNAR1 flexibility modulates ligand-binding affinity, which, in turn, regulates biological signaling. We identified the hinge sites and key interactions implicated in IFNAR1 inter-subdomain (SD1-SD4) movements. We showed that the predicted cooperative movements are essential to accommodate intermolecular interactions. Engineered disulfide bridges, computationally predicted to interfere with IFNAR1 dynamics, were experimentally confirmed. Notably, introducing disulfide bonds between subdomains SD2 and SD3 modulated IFN binding and activity in accordance with the relative attenuation of cooperative movements with varying distance from the hinge center, whereas locking the SD3-SD4 interface flexibility in favor of an extended conformer increased activity.
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Affiliation(s)
- Hongchun Li
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Nanaocha Sharma
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ignacio J General
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA; School of Science and Technology, and CONICET, Universidad Nacional de San Martin, San Martin, Buenos Aires 1650, Argentina
| | - Gideon Schreiber
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.
| | - Ivet Bahar
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.
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13
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Abstract
Type I interferons (IFN-1) are cytokines that affect the expression of thousands of genes, resulting in profound cellular changes. IFN-1 activates the cell by dimerizing its two-receptor chains, IFNAR1 and IFNAR2, which are expressed on all nucleated cells. Despite a similar mode of binding, the different IFN-1s activate a spectrum of activities. The causes for differential activation may stem from differences in IFN-1-binding affinity, duration of binding, number of surface receptors, induction of feedbacks, and cell type-specific variations. All together these will alter the signal that is transmitted from the extracellular domain inward. The intracellular domain binds, directly or indirectly, different effector proteins that transmit signals. The composition of effector molecules deviates between different cell types and tissues, inserting an additional level of complexity to the system. Moreover, IFN-1s do not act on their own, and clearly there is much cross-talk between the activated effector molecules by IFN-1 and other cytokines. The outcome generated by all of these factors (processing step) is an observed phenotype, which can be the transformation of the cell to an antiviral state, differentiation of the cell to a specific immune cell, senescence, apoptosis, and many more. IFN-1 activities can be divided into robust and tunable. Antiviral activity, which is stimulated by minute amounts of IFN-1 and is common to all cells, is termed robust. The other activities, which we term tunable, are cell type-specific and often require more stringent modes of activation. In this review, I summarize the current knowledge on the mode of activation and processing that is initiated by IFN-1, in perspective of the resulting phenotypes.
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Affiliation(s)
- Gideon Schreiber
- From the Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
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14
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Chuartzman SG, Nevo R, Waichman S, Shental D, Piehler J, Levy Y, Reich Z, Kapon R. Binding of interferon reduces the force of unfolding for interferon receptor 1. PLoS One 2017; 12:e0175413. [PMID: 28403186 PMCID: PMC5389645 DOI: 10.1371/journal.pone.0175413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Accepted: 03/24/2017] [Indexed: 11/19/2022] Open
Abstract
Differential signaling of the type I interferon receptor (IFNAR) has been correlated with the ability of its subunit, IFNAR1, to differentially recognize a large spectrum of different ligands, which involves intricate conformational re-arrangements of multiple interacting domains. To shed light onto the structural determinants governing ligand recognition, we compared the force-induced unfolding of the IFNAR1 ectodomain when bound to interferon and when free, using the atomic force microscope and steered molecular dynamics simulations. Unexpectedly, we find that IFNAR1 is easier to mechanically unfold when bound to interferon than when free. Analysis of the structures indicated that the origin of the reduction in unfolding forces is a conformational change in IFNAR1 induced by ligand binding.
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Affiliation(s)
- Silvia G. Chuartzman
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Reinat Nevo
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Sharon Waichman
- Department of Biology, University of Osnabrück, Osnabrück, Germany
| | - Dalit Shental
- Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Jacob Piehler
- Department of Biology, University of Osnabrück, Osnabrück, Germany
| | - Yaakov Levy
- Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Ziv Reich
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
- * E-mail: (RK); (ZR)
| | - Ruti Kapon
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
- * E-mail: (RK); (ZR)
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15
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Mastrangeli R, Iozzino L, Lanzoni L, Angiuoni G, Ferrao C, Izzo A, Fiumi S, Camerini F, Mascia M, Palinsky W, Bierau H. Biological Functions of Interferon β-1a Are Enhanced By Deamidation. J Interferon Cytokine Res 2016; 36:534-41. [DOI: 10.1089/jir.2016.0025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Renato Mastrangeli
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Luisa Iozzino
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Ludovica Lanzoni
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Gabriella Angiuoni
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Cristian Ferrao
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Anna Izzo
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Sabrina Fiumi
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Fabio Camerini
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Michele Mascia
- Analytical Development Biotech Products, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
| | - Wolf Palinsky
- Biotech Development Program, Merck Biopharma, an affiliate of Merck KgaA, Darmstadt, Germany, Aubonne, Switzerland
| | - Horst Bierau
- Biotech Development Program, CMC Sciences & Intelligence, Merck Serono SpA, an affiliate of Merck KgaA, Darmstadt, Germany, Rome, Italy
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16
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Du P, Xu L, Qiu W, Zeng D, Yue J, Wang S, Huang P, Sun Z. A fully human monoclonal antibody with novel binding epitope and excellent neutralizing activity to multiple human IFN-α subtypes: A candidate therapy for systemic lupus erythematosus. MAbs 2016; 7:969-80. [PMID: 26048268 DOI: 10.1080/19420862.2015.1055443] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is a chronic, heterogeneous autoimmune disease short of effective therapeutic agents. A multitude of studies of SLE in the last decade have accentuated a central role of the interferon alpha (IFN-α) pathway in SLE pathogenesis. We report here a candidate therapeutic neutralizing antibody, AIA22, with a different binding epitope and discrepant neutralizing profile from the anti-multiple IFN-α subtype antibodies currently in clinical trials. AIA22 specifically interacts with multiple IFN-α subtypes, binds to the type I IFN receptor 2 (IFNAR2) recognition region of IFN-α (considered a novel antigen epitope), and effectively neutralizes the activity of almost all of the IFN-α subtypes (with the exception of IFN-α7) both in vitro and in vivo. Concurrently, structural modeling and computational design yielded a mutational antibody of AIA22, AIAmut, which exhibited substantially improved neutralizing activity to multiple IFN-α subtypes.
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Affiliation(s)
- Peng Du
- a Beijing Institute of Biotechnology ; Beijing , China
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17
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Kuruganti S, Miersch S, Deshpande A, Speir JA, Harris BD, Schriewer JM, Buller RML, Sidhu SS, Walter MR. Cytokine Activation by Antibody Fragments Targeted to Cytokine-Receptor Signaling Complexes. J Biol Chem 2016; 291:447-61. [PMID: 26546677 PMCID: PMC4697184 DOI: 10.1074/jbc.m115.665943] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 10/14/2015] [Indexed: 01/12/2023] Open
Abstract
Exogenous cytokine therapy can induce systemic toxicity, which might be prevented by activating endogenously produced cytokines in local cell niches. Here we developed antibody-based activators of cytokine signaling (AcCS), which recognize cytokines only when they are bound to their cell surface receptors. AcCS were developed for type I interferons (IFNs), which induce cellular activities by binding to cell surface receptors IFNAR1 and IFNAR2. As a potential alternative to exogenous IFN therapy, AcCS were shown to potentiate the biological activities of natural IFNs by ∼100-fold. Biochemical and structural characterization demonstrates that the AcCS stabilize the IFN-IFNAR2 binary complex by recognizing an IFN-induced conformational change in IFNAR2. Using IFN mutants that disrupt IFNAR1 binding, AcCS were able to enhance IFN antiviral potency without activating antiproliferative responses. This suggests AcCS can be used to manipulate cytokine signaling for basic science and possibly for therapeutic applications.
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Affiliation(s)
- Srilalitha Kuruganti
- From the Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Shane Miersch
- Banting and Best Department of Medical Science, Donnelly Centre, University of Toronto, Toronto, Ontario M5G 1L6, Canada
| | - Ashlesha Deshpande
- From the Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Jeffrey A Speir
- National Resource for Automated Molecular Microscopy, Department of Integrative Structural and, Computational Biology, The Scripps Research Institute, La Jolla, California 92037, and
| | - Bethany D Harris
- From the Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Jill M Schriewer
- Department of Microbiology and Immunology, Saint Louis University Health Sciences Center, St. Louis, Missouri 63104
| | - R Mark L Buller
- Department of Microbiology and Immunology, Saint Louis University Health Sciences Center, St. Louis, Missouri 63104
| | - Sachdev S Sidhu
- Banting and Best Department of Medical Science, Donnelly Centre, University of Toronto, Toronto, Ontario M5G 1L6, Canada
| | - Mark R Walter
- From the Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama 35294,
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18
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Sharma N, Longjam G, Schreiber G. Type I Interferon Signaling Is Decoupled from Specific Receptor Orientation through Lenient Requirements of the Transmembrane Domain. J Biol Chem 2015; 291:3371-84. [PMID: 26679999 DOI: 10.1074/jbc.m115.686071] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Indexed: 01/09/2023] Open
Abstract
Type I interferons serve as the first line of defense against pathogen invasion. Binding of IFNs to its receptors, IFNAR1 and IFNAR2, is leading to activation of the IFN response. To determine whether structural perturbations observed during binding are propagated to the cytoplasmic domain, multiple mutations were introduced into the transmembrane helix and its surroundings. Insertion of one to five alanine residues near either the N or C terminus of the transmembrane domain (TMD) likely promotes a rotation of 100° and a translation of 1.5 Å per added residue. Surprisingly, the added alanines had little effect on the binding affinity of IFN to the cell surface receptors, STAT phosphorylation, or gene induction. Similarly, substitution of the juxtamembrane residues of the TMD with alanines, or replacement of the TMD of IFNAR1 with that of IFNAR2, did not affect IFN binding or activity. Finally, only the addition of 10 serine residues (but not 2 or 4) between the extracellular domain of IFNAR1 and the TMD had some effect on signaling. Bioinformatic analysis shows a correlation between high sequence conservation of TMDs of cytokine receptors and the ability to transmit structural signals. Sequence conservation near the TMD of IFNAR1 is low, suggesting limited functional importance for this region. Our results suggest that IFN binding to the extracellular domains of IFNAR1 and IFNAR2 promotes proximity between the intracellular domains and that differential signaling is a function of duration of activation and affinity of binding rather than specific conformational changes transmitted from the outside to the inside of the cell.
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Affiliation(s)
- Nanaocha Sharma
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Geeta Longjam
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Gideon Schreiber
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
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19
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Paul F, Pellegrini S, Uzé G. IFNA2: The prototypic human alpha interferon. Gene 2015; 567:132-7. [PMID: 25982860 PMCID: PMC5629289 DOI: 10.1016/j.gene.2015.04.087] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 04/21/2015] [Accepted: 04/28/2015] [Indexed: 01/10/2023]
Abstract
The human interferon α2 (IFNα2) was the first highly active IFN subtype to be cloned in the early eighties. It was also the first IFN and the first cytokine to be produced and commercialized by the pharmaceutical industry. Ipso facto it became the favorite IFNα subtype for academic researchers. For this fortunate reason IFNα2 has been at the origin of most discoveries related to the mechanism of action of type I interferons.
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Affiliation(s)
- Franciane Paul
- CNRS UMR 5235, University Montpellier, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | | | - Gilles Uzé
- CNRS UMR 5235, University Montpellier, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
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20
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Wilmes S, Beutel O, Li Z, Francois-Newton V, Richter CP, Janning D, Kroll C, Hanhart P, Hötte K, You C, Uzé G, Pellegrini S, Piehler J. Receptor dimerization dynamics as a regulatory valve for plasticity of type I interferon signaling. ACTA ACUST UNITED AC 2015; 209:579-93. [PMID: 26008745 PMCID: PMC4442803 DOI: 10.1083/jcb.201412049] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Type I interferons (IFNs) activate differential cellular responses through a shared cell surface receptor composed of the two subunits, IFNAR1 and IFNAR2. We propose here a mechanistic model for how IFN receptor plasticity is regulated on the level of receptor dimerization. Quantitative single-molecule imaging of receptor assembly in the plasma membrane of living cells clearly identified IFN-induced dimerization of IFNAR1 and IFNAR2. The negative feedback regulator ubiquitin-specific protease 18 (USP18) potently interferes with the recruitment of IFNAR1 into the ternary complex, probably by impeding complex stabilization related to the associated Janus kinases. Thus, the responsiveness to IFNα2 is potently down-regulated after the first wave of gene induction, while IFNβ, due to its ∼100-fold higher binding affinity, is still able to efficiently recruit IFNAR1. Consistent with functional data, this novel regulatory mechanism at the level of receptor assembly explains how signaling by IFNβ is maintained over longer times compared with IFNα2 as a temporally encoded cause of functional receptor plasticity.
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Affiliation(s)
- Stephan Wilmes
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Oliver Beutel
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Zhi Li
- Institut Pasteur, Cytokine Signaling Unit, Centre National de la Recherche Scientifique URA1961, 75724 Paris, France
| | - Véronique Francois-Newton
- Institut Pasteur, Cytokine Signaling Unit, Centre National de la Recherche Scientifique URA1961, 75724 Paris, France
| | - Christian P Richter
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Dennis Janning
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Cindy Kroll
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Patrizia Hanhart
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Katharina Hötte
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Changjiang You
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Gilles Uzé
- Centre National de la Recherche Scientifique Montpellier, 34095 Montpellier, France
| | - Sandra Pellegrini
- Institut Pasteur, Cytokine Signaling Unit, Centre National de la Recherche Scientifique URA1961, 75724 Paris, France
| | - Jacob Piehler
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
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21
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Löchte S, Waichman S, Beutel O, You C, Piehler J. Live cell micropatterning reveals the dynamics of signaling complexes at the plasma membrane. ACTA ACUST UNITED AC 2015; 207:407-18. [PMID: 25385185 PMCID: PMC4226739 DOI: 10.1083/jcb.201406032] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The use of micropatterned surfaces that bind HaloTag fusion proteins allows spatial organization of plasma membrane proteins for efficient visualization and quantification of protein–protein interactions in live cells. Interactions of proteins in the plasma membrane are notoriously challenging to study under physiological conditions. We report in this paper a generic approach for spatial organization of plasma membrane proteins into micropatterns as a tool for visualizing and quantifying interactions with extracellular, intracellular, and transmembrane proteins in live cells. Based on a protein-repellent poly(ethylene glycol) polymer brush, micropatterned surface functionalization with the HaloTag ligand for capturing HaloTag fusion proteins and RGD peptides promoting cell adhesion was devised. Efficient micropatterning of the type I interferon (IFN) receptor subunit IFNAR2 fused to the HaloTag was achieved, and highly specific IFN binding to the receptor was detected. The dynamics of this interaction could be quantified on the single molecule level, and IFN-induced receptor dimerization in micropatterns could be monitored. Assembly of active signaling complexes was confirmed by immunostaining of phosphorylated Janus family kinases, and the interaction dynamics of cytosolic effector proteins recruited to the receptor complex were unambiguously quantified by fluorescence recovery after photobleaching.
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Affiliation(s)
- Sara Löchte
- Department of Biology, University of Osnabrück, 49076 Osnabrück, Germany
| | - Sharon Waichman
- Department of Biology, University of Osnabrück, 49076 Osnabrück, Germany
| | - Oliver Beutel
- Department of Biology, University of Osnabrück, 49076 Osnabrück, Germany
| | - Changjiang You
- Department of Biology, University of Osnabrück, 49076 Osnabrück, Germany
| | - Jacob Piehler
- Department of Biology, University of Osnabrück, 49076 Osnabrück, Germany
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22
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Mastrangeli R, Rossi M, Mascia M, Palinsky W, Datola A, Terlizzese M, Bierau H. In vitro biological characterization of IFN- -1a major glycoforms. Glycobiology 2014; 25:21-9. [DOI: 10.1093/glycob/cwu082] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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23
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You C, Piehler J. Multivalent chelators for spatially and temporally controlled protein functionalization. Anal Bioanal Chem 2014; 406:3345-57. [DOI: 10.1007/s00216-014-7803-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 03/26/2014] [Accepted: 03/31/2014] [Indexed: 12/30/2022]
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24
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Krause CD, Digioia G, Izotova LS, Xie J, Kim Y, Schwartz BJ, Mirochnitchenko OV, Pestka S. Ligand-independent interaction of the type I interferon receptor complex is necessary to observe its biological activity. Cytokine 2013; 64:286-97. [PMID: 23830819 PMCID: PMC3770802 DOI: 10.1016/j.cyto.2013.06.309] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 04/23/2013] [Accepted: 06/10/2013] [Indexed: 10/26/2022]
Abstract
Ectopic coexpression of the two chains of the Type I and Type III interferon (IFN) receptor complexes (IFN-αR1 and IFN-αR2c, or IFN-λR1 and IL-10R2) yielded sensitivity to IFN-alpha or IFN-lambda in only some cells. We found that IFN-αR1 and IFN-αR2c exhibit FRET only when expressed at equivalent and low levels. Expanded clonal cell lines expressing both IFN-αR1 and IFN-αR2c were sensitive to IFN-alpha only when IFN-αR1 and IFN-αR2c exhibited FRET in the absence of human IFN-alpha. Coexpression of RACK-1 or Jak1 enhanced the affinity of the interaction between IFN-αR1 and IFN-αR2c. Both IFN-αR1 and IFN-αR2c exhibited FRET with Jak1 and Tyk2. Together with data showing that disruption of the preassociation between the IFN-gamma receptor chains inhibited its biological activity, we propose that biologically active IFN receptors require ligand-independent juxtaposition of IFN receptor chains assisted by their associated cytosolic proteins.
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Affiliation(s)
- Christopher D. Krause
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Gina Digioia
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
- Pestka Biomedical Laboratories, 131 Ethel Road West, Suite 6, Piscataway, NJ 08854 USA
| | - Lara S. Izotova
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Junxia Xie
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Youngsun Kim
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Barbara J. Schwartz
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Olga V. Mirochnitchenko
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Sidney Pestka
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
- Pestka Biomedical Laboratories, 131 Ethel Road West, Suite 6, Piscataway, NJ 08854 USA
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25
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Kamtekar N, Pandey A, Agrawal N, Pissurlenkar RRS, Borana M, Ahmad B. Interaction of multimicrobial synthetic inhibitor 1,2-bis(2-benzimidazolyl)-1,2-ethanediol with serum albumin: spectroscopic and computational studies. PLoS One 2013; 8:e53499. [PMID: 23308237 PMCID: PMC3537617 DOI: 10.1371/journal.pone.0053499] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Accepted: 11/30/2012] [Indexed: 02/02/2023] Open
Abstract
The molecule, 1,2-Bis(2-benzimidazolyl)-1,2-ethanediol (BBE) is known to act as a selective inhibitor of poliovirus, rhinovirus, Candida albicans, several bacterial species, and is easily synthesized by Phillips reaction. The interaction of BBE with BSA and the effects of its binding on the conformation and unfolding/refolding pathways of the protein were investigated using multispectroscopic techniques and molecular modeling. The binding studies indicate that BSA has one high affinity BBE binding site with association constant 6.02±0.05×10(4) M(-1) at 298 K. By measuring binding at different temperatures, we determined the changes in enthalpy (ΔH = -15.13±2.15 kJ mol(-1)), entropy (ΔS = 40.87±7.25 J mol(-1) K(-1)) and free energy (ΔG( = )26.78±1.02) of interaction, which indicate that the binding was spontaneous and both enthalpically and entropically driven. Based on molecular modeling and thermodynamic parameters, we proposed that the complex formation involved mainly hydrophilic interaction such as hydrogen bonding between hydroxyl groups of ethane-1,2-diol fragment with Tyr410 and benzimidazole sp(2) nitrogen atom with Ser488 and hydrophobic interaction between phenyl ring of one benzimidazole of the ligand and hydrophobic residues namely, Ile387, Cys391, Phe402, Val432 and Cys437. The sequential unfolding mechanism of BSA, site-specific marker displacement experiments and molecular modeling showed that the molecule preferably binds in subdomain IIIA. The BBE binding to BSA was found to cause both secondary and tertiary structural alterations in the protein as studied by intrinsic fluorescence, near-UV and far-UV circular dichroism results. The unfolding/refolding study showed that BBE stabilized native to intermediate states (N⇌I) transition of the protein by ∼2 kJ mol(-1) without affecting the intermediate to unfolded states (I⇌U) transition and general mechanism of unfolding of BSA.
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Affiliation(s)
- Nayana Kamtekar
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Mumbai, India
| | - Anita Pandey
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Mumbai, India
| | - Neeraj Agrawal
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Mumbai, India
| | | | - Mohanish Borana
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Mumbai, India
| | - Basir Ahmad
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Mumbai, India
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26
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Piehler J, Thomas C, Garcia KC, Schreiber G. Structural and dynamic determinants of type I interferon receptor assembly and their functional interpretation. Immunol Rev 2012; 250:317-34. [PMID: 23046138 PMCID: PMC3986811 DOI: 10.1111/imr.12001] [Citation(s) in RCA: 176] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Type I interferons (IFNs) form a network of homologous cytokines that bind to a shared, heterodimeric cell surface receptor and engage signaling pathways that activate innate and adaptive immune responses. The ability of IFNs to mediate differential responses through the same cell surface receptor has been subject of a controversial debate and has important medical implications. During the past decade, a comprehensive insight into the structure, energetics, and dynamics of IFN recognition by its two-receptor subunits, as well as detailed correlations with their functional properties on the level of signal activation, gene expression, and biological responses were obtained. All type I IFNs bind the two-receptor subunits at the same sites and form structurally very similar ternary complexes. Differential IFN activities were found to be determined by different lifetimes and ligand affinities toward the receptor subunits, which dictate assembly and dynamics of the signaling complex in the plasma membrane. We present a simple model, which explains differential IFN activities based on rapid endocytosis of signaling complexes and negative feedback mechanisms interfering with ternary complex assembly. More insight into signaling pathways as well as endosomal signaling and trafficking will be required for a comprehensive understanding, which will eventually lead to therapeutic applications of IFNs with increased efficacy.
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Affiliation(s)
- Jacob Piehler
- Department of Biology, University of Osnabrück, Osnabrück, Germany
| | - Christoph Thomas
- Departments of Molecular and Cellular Physiology, and Structural Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - K. Christopher Garcia
- Departments of Molecular and Cellular Physiology, and Structural Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Gideon Schreiber
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
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27
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Atanasova M, Whitty A. Understanding cytokine and growth factor receptor activation mechanisms. Crit Rev Biochem Mol Biol 2012; 47:502-30. [PMID: 23046381 DOI: 10.3109/10409238.2012.729561] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Our understanding of the detailed mechanism of action of cytokine and growth factor receptors - and particularly our quantitative understanding of the link between structure, mechanism and function - lags significantly behind our knowledge of comparable functional protein classes such as enzymes, G protein-coupled receptors, and ion channels. In particular, it remains controversial whether such receptors are activated by a mechanism of ligand-induced oligomerization, versus a mechanism in which the ligand binds to a pre-associated receptor dimer or oligomer that becomes activated through subsequent conformational rearrangement. A major limitation to progress has been the relative paucity of methods for performing quantitative mechanistic experiments on unmodified receptors expressed at endogenous levels on live cells. In this article, we review the current state of knowledge on the activation mechanisms of cytokine and growth factor receptors, critically evaluate the evidence for and against the different proposed mechanisms, and highlight other key questions that remain unanswered. New approaches and techniques have led to rapid recent progress in this area, and the field is poised for major advances in the coming years which promise to revolutionize our understanding of this large and biologically and medically important class of receptors.
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Affiliation(s)
- Mariya Atanasova
- Department of Chemistry, Boston University, Boston, MA 02215, USA
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28
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Blanco R, Alarcón B. TCR Nanoclusters as the Framework for Transmission of Conformational Changes and Cooperativity. Front Immunol 2012; 3:115. [PMID: 22582078 PMCID: PMC3348506 DOI: 10.3389/fimmu.2012.00115] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Accepted: 04/22/2012] [Indexed: 12/30/2022] Open
Abstract
Increasing evidence favors the notion that, before triggering, the T cell antigen receptor (TCR) forms nanometer-scale oligomers that are called nanoclusters. The organization of the TCR in pre-existing oligomers cannot be ignored when analyzing the properties of ligand (pMHC) recognition and signal transduction. As with other membrane receptors, the existence of TCR oligomers points out to cooperativity phenomena. We review the data in support of conformational changes in the TCR as the basic principle to transduce the activation signal to the cytoplasm and the incipient data suggesting cooperativity within nanoclusters.
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Affiliation(s)
- Raquel Blanco
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid Madrid, Spain
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Thomas C, Moraga I, Levin D, Krutzik PO, Podoplelova Y, Trejo A, Lee C, Yarden G, Vleck SE, Glenn JS, Nolan GP, Piehler J, Schreiber G, Garcia KC. Structural linkage between ligand discrimination and receptor activation by type I interferons. Cell 2011; 146:621-32. [PMID: 21854986 PMCID: PMC3166218 DOI: 10.1016/j.cell.2011.06.048] [Citation(s) in RCA: 259] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 05/17/2011] [Accepted: 06/15/2011] [Indexed: 11/16/2022]
Abstract
Type I Interferons (IFNs) are important cytokines for innate immunity against viruses and cancer. Sixteen human type I IFN variants signal through the same cell-surface receptors, IFNAR1 and IFNAR2, yet they can evoke markedly different physiological effects. The crystal structures of two human type I IFN ternary signaling complexes containing IFNα2 and IFNω reveal recognition modes and heterotrimeric architectures that are unique among the cytokine receptor superfamily but conserved between different type I IFNs. Receptor-ligand cross-reactivity is enabled by conserved receptor-ligand "anchor points" interspersed among ligand-specific interactions that "tune" the relative IFN-binding affinities, in an apparent extracellular "ligand proofreading" mechanism that modulates biological activity. Functional differences between IFNs are linked to their respective receptor recognition chemistries, in concert with a ligand-induced conformational change in IFNAR1, that collectively control signal initiation and complex stability, ultimately regulating differential STAT phosphorylation profiles, receptor internalization rates, and downstream gene expression patterns.
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Affiliation(s)
- Christoph Thomas
- Howard Hughes Medical Institute, Departments of Molecular and Cellular Physiology, and Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ignacio Moraga
- Howard Hughes Medical Institute, Departments of Molecular and Cellular Physiology, and Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Doron Levin
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Peter O. Krutzik
- Department of Microbiology and Immunology, Baxter Lab in Stem Cell Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yulia Podoplelova
- Division of Biophysics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Angelica Trejo
- Department of Microbiology and Immunology, Baxter Lab in Stem Cell Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Choongho Lee
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ganit Yarden
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Susan E. Vleck
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jeffrey S. Glenn
- Department of Medicine, Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Garry P. Nolan
- Department of Microbiology and Immunology, Baxter Lab in Stem Cell Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jacob Piehler
- Division of Biophysics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Gideon Schreiber
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - K. Christopher Garcia
- Howard Hughes Medical Institute, Departments of Molecular and Cellular Physiology, and Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
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Labeling of Oligohistidine-Tagged Proteins. ADVANCED FLUORESCENCE REPORTERS IN CHEMISTRY AND BIOLOGY III 2011. [DOI: 10.1007/978-3-642-18035-4_9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Schreiber G, Walter MR. Cytokine-receptor interactions as drug targets. Curr Opin Chem Biol 2010; 14:511-9. [PMID: 20619718 DOI: 10.1016/j.cbpa.2010.06.165] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 05/30/2010] [Accepted: 06/08/2010] [Indexed: 12/24/2022]
Abstract
Cytokines are essential proteins that exert potent control over entire cell populations to fight infections and other pathologies, but can by themselves cause disease. Therefore, cytokine-related drugs act either by stimulating or blocking their activities. Our knowledge of the structures of cytokine-receptor complexes, the biophysical basis of their binding, and their mode of biological activation has substantially increased in recent years. This knowledge has been translated into new drugs and drug candidates. This review summarizes our current understanding of the receptor-mediated activity of cytokines, their relation to health and disease, and the agents in use to activate and block their actions.
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Affiliation(s)
- Gideon Schreiber
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel.
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Waichman S, Bhagawati M, Podoplelova Y, Reichel A, Brunk A, Paterok D, Piehler J. Functional immobilization and patterning of proteins by an enzymatic transfer reaction. Anal Chem 2010; 82:1478-85. [PMID: 20092261 DOI: 10.1021/ac902608a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Functional immobilization and lateral organization of proteins into micro- and nanopatterns is an important prerequisite for miniaturizing bioanalytical and biotechnological devices. Here, we report an approach for efficient site-specific protein immobilization based on enzymatic phosphopantetheinyl transfer (PPT) from coenzyme A (CoA)-functionalized glass-type surfaces to specific peptide tags. We devised a bottom-up surface modification approach for coupling CoA densely to a molecular poly(ethylene glycol) polymer brush. Site-specific enzymatic immobilization of proteins fused to different target peptides for the PPTase Sfp was confirmed by real-time label-free detection. Quantitative protein-protein interaction experiments confirmed that significantly more than 50% of the immobilized protein was fully active. The method was successfully applied with different proteins. However, different immobilization efficiencies of PPT-based immobilization were observed for different peptide tags being fused to the N- and C-termini of proteins. On the basis of this immobilization method, we established photolithographic patterning of proteins into functional binary microstructures.
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Affiliation(s)
- Sharon Waichman
- Division of Biophysics, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
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Rich RL, Myszka DG. Grading the commercial optical biosensor literature-Class of 2008: 'The Mighty Binders'. J Mol Recognit 2010; 23:1-64. [PMID: 20017116 DOI: 10.1002/jmr.1004] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Optical biosensor technology continues to be the method of choice for label-free, real-time interaction analysis. But when it comes to improving the quality of the biosensor literature, education should be fundamental. Of the 1413 articles published in 2008, less than 30% would pass the requirements for high-school chemistry. To teach by example, we spotlight 10 papers that illustrate how to implement the technology properly. Then we grade every paper published in 2008 on a scale from A to F and outline what features make a biosensor article fabulous, middling or abysmal. To help improve the quality of published data, we focus on a few experimental, analysis and presentation mistakes that are alarmingly common. With the literature as a guide, we want to ensure that no user is left behind.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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Kaltashov IA, Bobst CE, Abzalimov RR, Berkowitz SA, Houde D. Conformation and dynamics of biopharmaceuticals: transition of mass spectrometry-based tools from academe to industry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2010; 21:323-37. [PMID: 19963397 PMCID: PMC2827695 DOI: 10.1016/j.jasms.2009.10.013] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 10/16/2009] [Accepted: 10/20/2009] [Indexed: 05/12/2023]
Abstract
Mass spectrometry plays a very visible role in biopharmaceutical industry, although its use in development, characterization, and quality control of protein drugs is mostly limited to the analysis of covalent structure (amino acid sequence and post-translational modifications). Despite the centrality of protein conformation to biological activity, stability, and safety of biopharmaceutical products, the expanding arsenal of mass spectrometry-based methods that are currently available to probe higher order structure and conformational dynamics of biopolymers did not, until recently, enjoy much attention in the industry. This is beginning to change as a result of recent work demonstrating the utility of these experimental tools for various aspects of biopharmaceutical product development and manufacturing. In this work, we use a paradigmatic protein drug interferon beta-1a as an example to illustrate the utility of mass spectrometry as a powerful tool not only to assess the integrity of higher order structure of a protein drug, but also to predict consequences of its degradation at a variety of levels.
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Affiliation(s)
- Igor A Kaltashov
- Department of Chemistry, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, USA.
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Receptor density is key to the alpha2/beta interferon differential activities. Mol Cell Biol 2009; 29:4778-87. [PMID: 19564411 DOI: 10.1128/mcb.01808-08] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Multiple type I interferons (IFN-alpha/beta) elicit Jak/Stat activation, rapid gene induction, and pleiotropic effects, such as differentiation, antiviral protection, and blocks in proliferation, which are dependent on the IFN subtype and the cellular context. To date, ligand- and receptor-specific molecular determinants underlying IFN-alpha/beta differential activities or potencies have been well characterized. To analyze cellular determinants that impact subtype-specific potency, human fibrosarcoma U5A-derived clones, exhibiting a gradient of IFN sensitivity by virtue of increasing receptor levels, were monitored for Jak/Stat signaling, gene induction, cell cycle lengthening, and apoptosis. In cells with scarce receptors, IFN-beta was more potent than IFN-alpha2 in antiproliferative activity, while the two subtypes were equipotent in all other readouts. Conversely, in cells with abundant receptors, IFN-alpha2 matched or even surpassed IFN-beta in all readouts tested. Our results suggest that the differential activities of the IFN subtypes are dictated not only by the intrinsic ligand/receptor binding kinetics but also by the density of cell surface receptor components.
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Strunk JJ, Gregor I, Becker Y, Lamken P, Lata S, Reichel A, Enderlein J, Piehler J. Probing Protein Conformations by in Situ Non-Covalent Fluorescence Labeling. Bioconjug Chem 2008; 20:41-6. [DOI: 10.1021/bc8002088] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jennifer Julia Strunk
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
| | - Ingo Gregor
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
| | - Yvonne Becker
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
| | - Peter Lamken
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
| | - Suman Lata
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
| | - Annett Reichel
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
| | - Jörg Enderlein
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
| | - Jacob Piehler
- Institute of Biochemistry and Cluster of Excellence Macromolecular Complexes (CEF), Johann Wolfgang Goethe-University, Frankfurt/Main, Germany, Department of Molecular Neurosensorics, Caesar Research Centre, Bonn, Germany, and Institute of Physical and Theoretical Chemistry, Eberhard-Karls-University, Tübingen, Germany
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Kalie E, Jaitin DA, Podoplelova Y, Piehler J, Schreiber G. The Stability of the Ternary Interferon-Receptor Complex Rather than the Affinity to the Individual Subunits Dictates Differential Biological Activities. J Biol Chem 2008; 283:32925-36. [DOI: 10.1074/jbc.m806019200] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Pan M, Kalie E, Scaglione BJ, Raveche ES, Schreiber G, Langer JA. Mutation of the IFNAR-1 receptor binding site of human IFN-alpha2 generates type I IFN competitive antagonists. Biochemistry 2008; 47:12018-27. [PMID: 18937499 DOI: 10.1021/bi801588g] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Type I interferons (IFNs) are multifunctional cytokines that activate cellular responses by binding a common receptor consisting of two subunits, IFNAR-1 and IFNAR-2. Although the binding of IFNs to IFNAR-2 is well characterized, the binding to the lower affinity IFNAR-1 remains less well understood. Previous reports identified a region of human IFN-alpha2 on the B and C helices ("site 1A": N65, L80, Y85, Y89) that plays a key role in binding IFNAR-1 and contributes strongly to differential activation by various type I IFNs. The current studies demonstrate that residues on the D helix are also involved in IFNAR-1 binding. In particular, residue 120 (Arg in IFN-alpha2; Lys in IFN-alpha2/alpha1) appears to be a "hot-spot" residue: substitution by alanine significantly decreased biological activity, and the charge-reversal mutation of residue 120 to Glu caused drastic loss of antiviral and antiproliferative activity for both IFN-alpha2 and IFN-alpha2/alpha1. Mutations in residues of helix D maintained their affinity for IFNAR-2 but had decreased affinity for IFNAR-1. Single-site or multiple-site mutants in the IFNAR-1 binding site that had little or no detectable in vitro biological activity were capable of blocking in vitro antiviral and antiproliferative activity of native IFN-alpha2; i.e., they are type I IFN antagonists. These prototype IFN antagonists can be developed further for possible therapeutic use in systemic lupus erythematosus, and analogous molecules can be designed for use in animal models.
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Affiliation(s)
- Manjing Pan
- Department of Molecular Genetics, Microbiology, and Immunology, UMDNJRobert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA
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Leaphart CL, Dai S, Gribar SC, Richardson W, Ozolek J, Shi XH, Bruns JR, Branca M, Li J, Weisz OA, Sodhi C, Hackam DJ. Interferon-gamma inhibits enterocyte migration by reversibly displacing connexin43 from lipid rafts. Am J Physiol Gastrointest Liver Physiol 2008; 295:G559-69. [PMID: 18635599 PMCID: PMC2536784 DOI: 10.1152/ajpgi.90320.2008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Necrotizing enterocolitis (NEC) is associated with the release of interferon-gamma (IFN) by enterocytes and delayed intestinal restitution. Our laboratory has recently demonstrated that IFN inhibits enterocyte migration by impairing enterocyte gap junctions, intercellular channels that are composed of connexin43 (Cx43) monomers and that are required for enterocyte migration to occur. The mechanisms by which IFN inhibits gap junctions are incompletely understood. Lipid rafts are cholesterol-sphingolipid-rich microdomains of the plasma membrane that play a central role in the trafficking and signaling of various proteins. We now hypothesize that Cx43 is present on enterocyte lipid rafts and that IFN inhibits enterocyte migration by displacing Cx43 from lipid rafts in enterocytes. We now confirm our previous observations that intestinal restitution is impaired in NEC and demonstrate that Cx43 is present on lipid rafts in IEC-6 enterocytes. We show that lipid rafts are required for enterocyte migration, that IFN displaces Cx43 from lipid rafts, and that the phorbol ester phorbol 12-myristate 13-acetate (PMA) restores Cx43 to lipid rafts after treatment with IFN in a protein kinase C-dependent manner. IFN also reversibly decreased the phosphorylation of Cx43 on lipid rafts, which was restored by PMA. Strikingly, restoration of Cx43 to lipid rafts by PMA or by transfection of enterocytes with adenoviruses expressing wild-type Cx43 but not mutant Cx43 is associated with the restoration of enterocyte migration after IFN treatment. Taken together, these findings suggest an important role for lipid raft-Cx43 interactions in the regulation of enterocyte migration during exposure to IFN, such as NEC.
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Affiliation(s)
- Cynthia L. Leaphart
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Shipan Dai
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Steven C. Gribar
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ward Richardson
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - John Ozolek
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Xia-hua Shi
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jennifer R. Bruns
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Maria Branca
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jun Li
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ora A. Weisz
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Chhinder Sodhi
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - David J. Hackam
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
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Abstract
Numerous important drugs target cytokines and growth factors or their receptors. Our understanding of the molecular mechanisms governing receptor activation and signaling has lagged in key areas, however, limiting drug discovery efforts to relatively few basic strategies. Recently, substantial progress has been made on several aspects of this problem. These include improved methods for establishing the mechanism of receptor activation, a clearer understanding of the biochemical basis for differential signaling by ligands that act through a common receptor, new methods for measuring the affinities of steps in receptor activation on live cells, and progress toward a systems level understanding of receptor signaling. These advances are providing a new understanding of the function of these receptors that presents opportunities for the development of improved drugs.
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