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Columbus J, Turbyville T. Studying RAS Interactions in Live Cells with BRET. Methods Mol Biol 2024; 2797:253-260. [PMID: 38570465 DOI: 10.1007/978-1-0716-3822-4_18] [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] [Indexed: 04/05/2024]
Abstract
Bioluminescence resonance energy transfer (BRET) is a valuable technique for studying protein-protein interactions (PPIs) within live cells (Pfleger and Eidne, Nat Methods 3:165-174, 2006). Among the various BRET methodologies, a recent addition called NanoBRET has emerged, leveraging advancements in donor and acceptor technologies (Machleidt and Woodroofe, ACS Chem Biol 10:1797-1804, 2015). In this study, we present a developed methodology designed to measure PPIs involving the RAS protein family and their effectors and interactors at the plasma membrane. By utilizing the NanoLuc and HaloTag BRET pair, we provide evidence of a saturable interaction between KRAS4b-G12D and full-length RAF1. Conversely, the RAF1 R89L mutant, known to impede RAF1 binding to active RAS, exhibits nonspecific interactions. The assay exhibits remarkable signal-to-background ratios and is highly suitable for investigating the interactions of RAS with effectors, as well as for high-throughput screening assays.
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Affiliation(s)
- John Columbus
- NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Thomas Turbyville
- NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA.
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2
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Zheng C, Javitch JA, Lambert NA, Donthamsetti P, Gurevich VV. In-Cell Arrestin-Receptor Interaction Assays. Curr Protoc 2023; 3:e890. [PMID: 37787634 PMCID: PMC10566372 DOI: 10.1002/cpz1.890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
G protein-coupled receptors (GPCRs) represent ∼30% of current drug targets. Ligand binding to these receptors activates G proteins and arrestins, which function in different signaling pathways. Given that functionally selective or biased ligands preferentially activate one of these two groups of pathways, they may be superior medications for certain disease states. The identification of such ligands requires robust drug screening assays for both G protein and arrestin activity. This unit describes protocols for assays that monitor reversible arrestin recruitment to GPCRs in living cells using either bioluminescence resonance energy transfer (BRET) or nanoluciferase complementation (NanoLuc). Two types of assays can be used: one configuration directly measures arrestin recruitment to a GPCR fused to a protein tag at its intracellular C-terminus, whereas the other configuration detects arrestin translocation to the plasma membrane in response to activation of an unmodified GPCR. Together, these assays are powerful tools for studying dynamic interactions between GPCRs and arrestins. © 2023 Wiley Periodicals LLC. Basic Protocol 1: Receptor-arrestin BRET assay to measure ligand-induced recruitment of arrestin to receptors Basic Protocol 2: Receptor-arrestin NANOBIT assay to measure ligand-induced recruitment of arrestin to receptors Alternative Protocol 1: BRET assay to measure ligand-induced recruitment of arrestin to the plasma membrane Alternative Protocol 2: NANOBIT assay to measure ligand-induced recruitment of arrestin to the plasma membrane Support Protocol 1: Optimization of polyethylenimine (PEI) concentration for transfection.
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Affiliation(s)
- Chen Zheng
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee
| | - Jonathan A. Javitch
- Departments of Psychiatry and Molecular Pharmacology and Therapeutics, Columbia University Vagelos College of Physicians and Surgeons, New York, New York
- Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, New York
| | - Nevin A. Lambert
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, Georgia
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3
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Prindle JR, de Cuba OIC, Gahlmann A. Single-molecule tracking to determine the abundances and stoichiometries of freely-diffusing protein complexes in living cells: Past applications and future prospects. J Chem Phys 2023; 159:071002. [PMID: 37589409 PMCID: PMC10908566 DOI: 10.1063/5.0155638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/06/2023] [Indexed: 08/18/2023] Open
Abstract
Most biological processes in living cells rely on interactions between proteins. Live-cell compatible approaches that can quantify to what extent a given protein participates in homo- and hetero-oligomeric complexes of different size and subunit composition are therefore critical to advance our understanding of how cellular physiology is governed by these molecular interactions. Biomolecular complex formation changes the diffusion coefficient of constituent proteins, and these changes can be measured using fluorescence microscopy-based approaches, such as single-molecule tracking, fluorescence correlation spectroscopy, and fluorescence recovery after photobleaching. In this review, we focus on the use of single-molecule tracking to identify, resolve, and quantify the presence of freely-diffusing proteins and protein complexes in living cells. We compare and contrast different data analysis methods that are currently employed in the field and discuss experimental designs that can aid the interpretation of the obtained results. Comparisons of diffusion rates for different proteins and protein complexes in intracellular aqueous environments reported in the recent literature reveal a clear and systematic deviation from the Stokes-Einstein diffusion theory. While a complete and quantitative theoretical explanation of why such deviations manifest is missing, the available data suggest the possibility of weighing freely-diffusing proteins and protein complexes in living cells by measuring their diffusion coefficients. Mapping individual diffusive states to protein complexes of defined molecular weight, subunit stoichiometry, and structure promises to provide key new insights into how protein-protein interactions regulate protein conformational, translational, and rotational dynamics, and ultimately protein function.
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Affiliation(s)
- Joshua Robert Prindle
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Olivia Isabella Christiane de Cuba
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia 22903, USA
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4
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Joushomme A, Orlacchio R, Patrignoni L, Canovi A, Chappe YL, Poulletier De Gannes F, Hurtier A, Garenne A, Lagroye I, Moisan F, Cario M, Lévêque P, Arnaud-Cormos D, Percherancier Y. Effects of 5G-modulated 3.5 GHz radiofrequency field exposures on HSF1, RAS, ERK, and PML activation in live fibroblasts and keratinocytes cells. Sci Rep 2023; 13:8305. [PMID: 37221363 DOI: 10.1038/s41598-023-35397-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 05/17/2023] [Indexed: 05/25/2023] Open
Abstract
The potential health risks of exposure to radiofrequency electromagnetic fields from mobile communications technologies have raised societal concerns. Guidelines have been set to protect the population (e.g. non-specific heating above 1 °C under exposure to radiofrequency fields), but questions remain regarding the potential biological effects of non-thermal exposures. With the advent of the fifth generation (5G) of mobile communication, assessing whether exposure to this new signal induces a cellular stress response is one of the mandatory steps on the roadmap for a safe deployment and health risk evaluation. Using the BRET (Bioluminescence Resonance Energy-Transfer) technique, we assessed whether continuous or intermittent (5 min ON/ 10 min OFF) exposure of live human keratinocytes and fibroblasts cells to 5G 3.5 GHz signals at specific absorption rate (SAR) up to 4 W/kg for 24 h impact basal or chemically-induced activity of Heat Shock Factor (HSF), RAt Sarcoma virus (RAS) and Extracellular signal-Regulated Kinases (ERK) kinases, and Promyelocytic Leukemia Protein (PML), that are all molecular pathways involved in environmental cell-stress responses. The main results are (i), a decrease of the HSF1 basal BRET signal when fibroblasts cells were exposed at the lower SARs tested (0.25 and 1 W/kg), but not at the highest one (4 W/kg), and (ii) a slight decrease of As2O3 maximal efficacy to trigger PML SUMOylation when fibroblasts cells, but not keratinocytes, were continuously exposed to the 5G RF-EMF signal. Nevertheless, given the inconsistency of these effects in terms of impacted cell type, effective SAR, exposure mode, and molecular cell stress response, we concluded that our study show no conclusive evidence that molecular effects can arise when skin cells are exposed to the 5G RF-EMF alone or with a chemical stressor.
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Affiliation(s)
- Alexandre Joushomme
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France
| | - Rosa Orlacchio
- Limoges University, CNRS, XLIM, UMR 7252, F-87000, Limoges, France
| | - Lorenza Patrignoni
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France
| | - Anne Canovi
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France
| | - Yann Loïck Chappe
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France
| | | | - Annabelle Hurtier
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France
| | - André Garenne
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France
| | - Isabelle Lagroye
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France
- Paris Sciences et Lettres Research University, F-75006, Paris, France
| | - François Moisan
- Bordeaux University, INSERM, BMGIC Laboratory, UMR1035, F-33000, Bordeaux, France
| | - Muriel Cario
- Bordeaux University, INSERM, BMGIC Laboratory, UMR1035, F-33000, Bordeaux, France
| | - Philippe Lévêque
- Limoges University, CNRS, XLIM, UMR 7252, F-87000, Limoges, France
| | - Delia Arnaud-Cormos
- Limoges University, CNRS, XLIM, UMR 7252, F-87000, Limoges, France
- Institut Universitaire de France (IUF), F-75005, Paris, France
| | - Yann Percherancier
- Bordeaux University, CNRS, IMS laboratory, UMR5218, F-33400, Talence, France.
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5
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Gaitonde SA, Bouvier M. Enhanced Bystander BRET (ebBRET) Biosensors as Biophysical Tools to Map the Signaling Profile of Neuropsychiatric Drugs Targeting GPCRs. Methods Mol Biol 2023; 2687:15-30. [PMID: 37464159 DOI: 10.1007/978-1-0716-3307-6_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Bioluminescence resonance energy transfer (BRET) is a non-radiative energy transfer between a bioluminescent donor and a fluorescent acceptor with far-reaching applications in detecting physiologically relevant protein-protein interactions. The recently developed enhanced bystander BRET (ebBRET) biosensors have made it possible to rapidly determine the signaling profile of a series of ligands across a large number of GPCRs and their signaling repertoires, which has tremendous implications in the drug discovery process. Here we describe BRET and the ebBRET biosensors as investigational tools in establishing functional selectivity downstream of GPCRs.
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Affiliation(s)
- Supriya A Gaitonde
- Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, QC, Canada.
| | - Michel Bouvier
- Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, QC, Canada
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6
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Wall MJ, Hill E, Huckstepp R, Barkan K, Deganutti G, Leuenberger M, Preti B, Winfield I, Carvalho S, Suchankova A, Wei H, Safitri D, Huang X, Imlach W, La Mache C, Dean E, Hume C, Hayward S, Oliver J, Zhao FY, Spanswick D, Reynolds CA, Lochner M, Ladds G, Frenguelli BG. Selective activation of Gαob by an adenosine A 1 receptor agonist elicits analgesia without cardiorespiratory depression. Nat Commun 2022; 13:4150. [PMID: 35851064 PMCID: PMC9293909 DOI: 10.1038/s41467-022-31652-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 06/23/2022] [Indexed: 02/06/2023] Open
Abstract
The development of therapeutic agonists for G protein-coupled receptors (GPCRs) is hampered by the propensity of GPCRs to couple to multiple intracellular signalling pathways. This promiscuous coupling leads to numerous downstream cellular effects, some of which are therapeutically undesirable. This is especially the case for adenosine A1 receptors (A1Rs) whose clinical potential is undermined by the sedation and cardiorespiratory depression caused by conventional agonists. We have discovered that the A1R-selective agonist, benzyloxy-cyclopentyladenosine (BnOCPA), is a potent and powerful analgesic but does not cause sedation, bradycardia, hypotension or respiratory depression. This unprecedented discrimination between native A1Rs arises from BnOCPA's unique and exquisitely selective activation of Gob among the six Gαi/o subtypes, and in the absence of β-arrestin recruitment. BnOCPA thus demonstrates a highly-specific Gα-selective activation of the native A1R, sheds new light on GPCR signalling, and reveals new possibilities for the development of novel therapeutics based on the far-reaching concept of selective Gα agonism.
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Affiliation(s)
- Mark J Wall
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK.
| | - Emily Hill
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | - Robert Huckstepp
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | - Kerry Barkan
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1PD, UK
| | - Giuseppe Deganutti
- Centre for Sport, Exercise and Life Sciences (CSELS), Faculty of Health and Life Sciences, Coventry University, Coventry, CV1 2DS, UK
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK
| | - Michele Leuenberger
- Institute of Biochemistry and Molecular Medicine, University of Bern, 3012, Bern, Switzerland
| | - Barbara Preti
- Institute of Biochemistry and Molecular Medicine, University of Bern, 3012, Bern, Switzerland
| | - Ian Winfield
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1PD, UK
| | - Sabrina Carvalho
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1PD, UK
| | - Anna Suchankova
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1PD, UK
| | | | - Dewi Safitri
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1PD, UK
- Pharmacology and Clinical Pharmacy Research Group, School of Pharmacy, Bandung Institute of Technology, Bandung, 40132, Indonesia
| | - Xianglin Huang
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1PD, UK
| | - Wendy Imlach
- Department of Physiology, Monash Biomedicine Discovery Institute, Monash University, Innovation Walk, Clayton, VIC, 3800, Australia
| | - Circe La Mache
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | - Eve Dean
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | - Cherise Hume
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | - Stephanie Hayward
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | - Jess Oliver
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | | | - David Spanswick
- NeuroSolutions Ltd, Coventry, UK
- Department of Physiology, Monash Biomedicine Discovery Institute, Monash University, Innovation Walk, Clayton, VIC, 3800, Australia
- Warwick Medical School, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK
| | - Christopher A Reynolds
- Centre for Sport, Exercise and Life Sciences (CSELS), Faculty of Health and Life Sciences, Coventry University, Coventry, CV1 2DS, UK
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK
| | - Martin Lochner
- Institute of Biochemistry and Molecular Medicine, University of Bern, 3012, Bern, Switzerland
| | - Graham Ladds
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1PD, UK.
| | - Bruno G Frenguelli
- School of Life Sciences, University of Warwick, Gibbet Hill Rd, Coventry, CV4 7AL, UK.
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7
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Barbeau S, Joushomme A, Chappe Y, Cardouat G, Baudrimont I, Freund-Michel V, Guibert C, Marthan R, Berger P, Vacher P, Percherancier Y, Quignard JF, Ducret T. Cell Confluence Modulates TRPV4 Channel Activity in Response to Hypoxia. Biomolecules 2022; 12:biom12070954. [PMID: 35883510 PMCID: PMC9313184 DOI: 10.3390/biom12070954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 12/13/2022] Open
Abstract
Transient receptor potential vanilloid 4 (TRPV4) is a polymodal Ca2+-permeable channel involved in various hypoxia-sensitive pathophysiological phenomena. Different tools are available to study channel activity, requiring cells to be cultured at specific optimal densities. In the present study, we examined if cell density may influence the effect of hypoxia on TRPV4 activity. Transiently TRPV4-transfected HEK293T cells were seeded at low or high densities corresponding to non-confluent or confluent cells, respectively, on the day of experiments, and cultured under in vitro normoxia or hypoxia. TRPV4-mediated cytosolic Ca2+ responses, single-channel currents, and Ca2+ influx through the channel were measured using Ca2+ imaging/microspectrofluorimetric assay, patch-clamp, and Bioluminescence Resonance Energy Transfer (BRET), respectively. TRPV4 plasma membrane translocation was studied using confocal microscopy, biotinylation of cell surface proteins, and BRET. Our results show that hypoxia exposure has a differential effect on TRPV4 activation depending on cell confluence. At low confluence levels, TRPV4 response is increased in hypoxia, whereas at high confluence levels, TRPV4 response is strongly inhibited, due to channel internalization. Thus, cell density appears to be a crucial parameter for TRPV4 channel activity.
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Affiliation(s)
- Solène Barbeau
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
| | - Alexandre Joushomme
- Laboratoire de l’Intégration du Matériau au Système, UMR5518, Univ. Bordeaux, F-33400 Talence, France; (A.J.); (Y.C.); (Y.P.)
- CNRS (Centre National de la Recherche Scientifique), Laboratoire de L’integration du Matériau au Système, UMR5518, F-33400 Talence, France
| | - Yann Chappe
- Laboratoire de l’Intégration du Matériau au Système, UMR5518, Univ. Bordeaux, F-33400 Talence, France; (A.J.); (Y.C.); (Y.P.)
- CNRS (Centre National de la Recherche Scientifique), Laboratoire de L’integration du Matériau au Système, UMR5518, F-33400 Talence, France
| | - Guillaume Cardouat
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
| | - Isabelle Baudrimont
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
| | - Véronique Freund-Michel
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
| | - Christelle Guibert
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
| | - Roger Marthan
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
- CHU (Centre Hospitalier Universitaire) Bordeaux, Service d’Exploration Fonctionnelle Respiratoire, F-33600 Pessac, France
| | - Patrick Berger
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
- CHU (Centre Hospitalier Universitaire) Bordeaux, Service d’Exploration Fonctionnelle Respiratoire, F-33600 Pessac, France
| | - Pierre Vacher
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
| | - Yann Percherancier
- Laboratoire de l’Intégration du Matériau au Système, UMR5518, Univ. Bordeaux, F-33400 Talence, France; (A.J.); (Y.C.); (Y.P.)
- CNRS (Centre National de la Recherche Scientifique), Laboratoire de L’integration du Matériau au Système, UMR5518, F-33400 Talence, France
| | - Jean-François Quignard
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
| | - Thomas Ducret
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33600 Pessac, France; (S.B.); (G.C.); (I.B.); (V.F.-M.); (C.G.); (R.M.); (P.B.); (P.V.); (J.-F.Q.)
- INSERM (Institut National de la Santé Et de la Recherche Médicale), Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33600 Pessac, France
- Correspondence:
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8
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Azad T, Janse van Rensburg HJ, Morgan J, Rezaei R, Crupi MJF, Chen R, Ghahremani M, Jamalkhah M, Forbes N, Ilkow C, Bell JC. Luciferase-Based Biosensors in the Era of the COVID-19 Pandemic. ACS NANOSCIENCE AU 2021; 1:15-37. [PMID: 37579261 PMCID: PMC8370122 DOI: 10.1021/acsnanoscienceau.1c00009] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Luciferase-based biosensors have a wide range of applications and assay formats, including their relatively recent use in the study of viruses. Split luciferase, bioluminescence resonance energy transfer, circularly permuted luciferase, cyclic luciferase, and dual luciferase systems have all been used to interrogate the structure and function of prominent viruses infecting humans, animals, and plants. The utility of these assays is demonstrated by numerous studies which have not only successfully characterized interactions between viral and host cell proteins but that have also used these systems to identify viral inhibitors. In the present COVID-19 pandemic, luciferase-based biosensors are already playing a critical role in the study of the culprit virus SARS-CoV-2 as well as in the development of serological assays and drug development via high-throughput screening. In this review paper, we provide a summary of existing luciferase-based biosensors and their applications in virology.
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Affiliation(s)
- Taha Azad
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
| | | | - Jessica Morgan
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
| | - Reza Rezaei
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
| | - Mathieu J. F. Crupi
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
| | - Rui Chen
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
| | - Mina Ghahremani
- Canada
Department of Biology, University of Ottawa, Ottawa K1N 6N5, Canada
| | - Monire Jamalkhah
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
| | - Nicole Forbes
- Centre
for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa K2E 1B6, Canada
| | - Carolina Ilkow
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
| | - John C. Bell
- Centre
for Innovative Cancer Research, Ottawa Hospital
Research Institute, Ottawa K1H 8L6, Canada
- Department
of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada
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9
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Budzinski J, Maschauer S, Kobayashi H, Couvineau P, Vogt H, Gmeiner P, Roggenhofer A, Prante O, Bouvier M, Weikert D. Bivalent ligands promote endosomal trafficking of the dopamine D3 receptor-neurotensin receptor 1 heterodimer. Commun Biol 2021; 4:1062. [PMID: 34508168 PMCID: PMC8433439 DOI: 10.1038/s42003-021-02574-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 08/18/2021] [Indexed: 02/08/2023] Open
Abstract
Bivalent ligands are composed of two pharmacophores connected by a spacer of variable size. These ligands are able to simultaneously recognize two binding sites, for example in a G protein-coupled receptor heterodimer, resulting in enhanced binding affinity. Taking advantage of previously described heterobivalent dopamine-neurotensin receptor ligands, we demonstrate specific interactions between dopamine D3 (D3R) and neurotensin receptor 1 (NTSR1), two receptors with expression in overlapping brain areas that are associated with neuropsychiatric diseases and addiction. Bivalent ligand binding to D3R-NTSR1 dimers results in picomolar binding affinity and high selectivity compared to the binding to monomeric receptors. Specificity of the ligands for the D3R-NTSR1 receptor pair over D2R-NTSR1 dimers can be achieved by a careful choice of the linker length. Bivalent ligands enhance and stabilize the receptor-receptor interaction leading to NTSR1-controlled internalization of D3R into endosomes via recruitment of β-arrestin, highlighting a potential mechanism for dimer-specific receptor trafficking and signalling.
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Affiliation(s)
- Julian Budzinski
- grid.5330.50000 0001 2107 3311Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Simone Maschauer
- grid.5330.50000 0001 2107 3311Department of Nuclear Medicine, Molecular Imaging and Radiochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Hiroyuki Kobayashi
- grid.14848.310000 0001 2292 3357Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, Université de Montréal, Montreal, QC Canada
| | - Pierre Couvineau
- grid.14848.310000 0001 2292 3357Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, Université de Montréal, Montreal, QC Canada
| | - Hannah Vogt
- grid.5330.50000 0001 2107 3311Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Peter Gmeiner
- grid.5330.50000 0001 2107 3311Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Anna Roggenhofer
- grid.5330.50000 0001 2107 3311Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Olaf Prante
- grid.5330.50000 0001 2107 3311Department of Nuclear Medicine, Molecular Imaging and Radiochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Michel Bouvier
- grid.14848.310000 0001 2292 3357Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, Université de Montréal, Montreal, QC Canada
| | - Dorothee Weikert
- grid.5330.50000 0001 2107 3311Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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10
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Lotz-Havla AS, Woidy M, Guder P, Friedel CC, Klingbeil JM, Bulau AM, Schultze A, Dahmen I, Noll-Puchta H, Kemp S, Erdmann R, Zimmer R, Muntau AC, Gersting SW. iBRET Screen of the ABCD1 Peroxisomal Network and Mutation-Induced Network Perturbations. J Proteome Res 2021; 20:4366-4380. [PMID: 34383492 DOI: 10.1021/acs.jproteome.1c00330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mapping the network of proteins provides a powerful means to investigate the function of disease genes and to unravel the molecular basis of phenotypes. We present an automated informatics-aided and bioluminescence resonance energy transfer-based approach (iBRET) enabling high-confidence detection of protein-protein interactions in living mammalian cells. A screen of the ABCD1 protein, which is affected in X-linked adrenoleukodystrophy (X-ALD), against an organelle library of peroxisomal proteins demonstrated applicability of iBRET for large-scale experiments. We identified novel protein-protein interactions for ABCD1 (with ALDH3A2, DAO, ECI2, FAR1, PEX10, PEX13, PEX5, PXMP2, and PIPOX), mapped its position within the peroxisomal protein-protein interaction network, and determined that pathogenic missense variants in ABCD1 alter the interaction with selected binding partners. These findings provide mechanistic insights into pathophysiology of X-ALD and may foster the identification of new disease modifiers.
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Affiliation(s)
- Amelie S Lotz-Havla
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, 80337 Munich, Germany
| | - Mathias Woidy
- University Children's Research, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Philipp Guder
- University Children's Research, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Caroline C Friedel
- Institute of Informatics, Ludwig-Maximilians-Universität München, 80538 Munich, Germany
| | - Julian M Klingbeil
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, 80337 Munich, Germany
| | - Ana-Maria Bulau
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, 80337 Munich, Germany
| | - Anja Schultze
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, 80337 Munich, Germany
| | - Ilona Dahmen
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, 80337 Munich, Germany
| | - Heidi Noll-Puchta
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, 80337 Munich, Germany
| | - Stephan Kemp
- Department of Clinical Chemistry, Laboratory Genetic Metabolic Diseases, Amsterdam UMC, Amsterdam Neuroscience, Amsterdam Gastroenterology & Metabolism, University of Amsterdam, 1105 WX Amsterdam, The Netherlands
| | - Ralf Erdmann
- Systems Biochemistry, Medical Faculty, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Ralf Zimmer
- Institute of Informatics, Ludwig-Maximilians-Universität München, 80538 Munich, Germany
| | - Ania C Muntau
- University Children's Hospital, University Medical Center Hamburg Eppendorf, 20246 Hamburg, Germany
| | - Søren W Gersting
- University Children's Research, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
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11
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Pereira PHS, Garcia CRS, Bouvier M. Identifying Plasmodium falciparum receptor activation using bioluminescence resonance energy transfer (BRET)-based biosensors in HEK293 cells. Methods Cell Biol 2021; 166:223-233. [PMID: 34752334 DOI: 10.1016/bs.mcb.2021.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Throughout evolution the need for unicellular organisms to associate and form a single cluster of cells had several evolutionary advantages. G protein coupled receptors (GPCRs) are responsible for a large part of the senses that allow this clustering to succeed, playing a fundamental role in the perception of cell's external environment, enabling the interaction and coordinated development between each cell of a multicellular organism. GPCRs are not exclusive to complex multicellular organisms. In single-celled organisms, GPCRs are also present and have a similar function of detecting changes in the external environment and transforming them into a biological response. There are no reports of GPCRs in parasitic protozoa, such as the Plasmodium genus, and the identification of a protein of this family in P. falciparum would have a significant impact both on the understanding of the basic biology of the parasite and on the history of the evolution of GPCRs. The protocol described here was successfully applied to study a GPCR candidate in P. falciparum for the first time, and we hope that it helps other groups to use the same approach to study this deadly parasite.
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Affiliation(s)
- Pedro H S Pereira
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil; Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, University of Montreal, Montreal, QC, Canada
| | - Celia R S Garcia
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil.
| | - Michel Bouvier
- Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, University of Montreal, Montreal, QC, Canada
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12
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Li T, Chen X, Qian Y, Shao J, Li X, Liu S, Zhu L, Zhao Y, Ye H, Yang Y. A synthetic BRET-based optogenetic device for pulsatile transgene expression enabling glucose homeostasis in mice. Nat Commun 2021; 12:615. [PMID: 33504786 PMCID: PMC7840992 DOI: 10.1038/s41467-021-20913-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 12/21/2020] [Indexed: 12/26/2022] Open
Abstract
Pulsing cellular dynamics in genetic circuits have been shown to provide critical capabilities to cells in stress response, signaling and development. Despite the fascinating discoveries made in the past few years, the mechanisms and functional capabilities of most pulsing systems remain unclear, and one of the critical challenges is the lack of a technology that allows pulsatile regulation of transgene expression both in vitro and in vivo. Here, we describe the development of a synthetic BRET-based transgene expression (LuminON) system based on a luminescent transcription factor, termed luminGAVPO, by fusing NanoLuc luciferase to the light-switchable transcription factor GAVPO. luminGAVPO allows pulsatile and quantitative activation of transgene expression via both chemogenetic and optogenetic approaches in mammalian cells and mice. Both the pulse amplitude and duration of transgene expression are highly tunable via adjustment of the amount of furimazine. We further demonstrated LuminON-mediated blood-glucose homeostasis in type 1 diabetic mice. We believe that the BRET-based LuminON system with the pulsatile dynamics of transgene expression provides a highly sensitive tool for precise manipulation in biological systems that has strong potential for application in diverse basic biological studies and gene- and cell-based precision therapies in the future.
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Affiliation(s)
- Ting Li
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
- School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
| | - Xianjun Chen
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
- School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
- CAS Center for Excellence in Brain Science and Intelligence Technology, Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Yajie Qian
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
- School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
| | - Jiawei Shao
- Synthetic Biology and Biomedical Engineering Laboratory, Biomedical Synthetic Biology Research Center, Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Xie Li
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
- School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
| | - Shuning Liu
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
- School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
| | - Linyong Zhu
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
| | - Yuzheng Zhao
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
- School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China
| | - Haifeng Ye
- Synthetic Biology and Biomedical Engineering Laboratory, Biomedical Synthetic Biology Research Center, Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China.
| | - Yi Yang
- Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China.
- School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, China.
- CAS Center for Excellence in Brain Science and Intelligence Technology, Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, 200031, China.
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13
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Moo EV, van Senten JR, Bräuner-Osborne H, Møller TC. Arrestin-Dependent and -Independent Internalization of G Protein-Coupled Receptors: Methods, Mechanisms, and Implications on Cell Signaling. Mol Pharmacol 2021; 99:242-255. [PMID: 33472843 DOI: 10.1124/molpharm.120.000192] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 01/07/2021] [Indexed: 01/05/2023] Open
Abstract
Agonist-induced endocytosis is a key regulatory mechanism for controlling the responsiveness of the cell by changing the density of cell surface receptors. In addition to the role of endocytosis in signal termination, endocytosed G protein-coupled receptors (GPCRs) have been found to signal from intracellular compartments of the cell. Arrestins are generally believed to be the master regulators of GPCR endocytosis by binding to both phosphorylated receptors and adaptor protein 2 (AP-2) or clathrin, thus recruiting receptors to clathrin-coated pits to facilitate the internalization process. However, many other functions have been described for arrestins that do not relate to their role in terminating signaling. Additionally, there are now more than 30 examples of GPCRs that internalize independently of arrestins. Here we review the methods, pharmacological tools, and cellular backgrounds used to determine the role of arrestins in receptor internalization, highlighting their advantages and caveats. We also summarize key examples of arrestin-independent GPCR endocytosis in the literature and their suggested alternative endocytosis pathway (e.g., the caveolae-dependent and fast endophilin-mediated endocytosis pathways). Finally, we consider the possible function of arrestins recruited to GPCRs that are endocytosed independently of arrestins, including the catalytic arrestin activation paradigm. Technological improvements in recent years have advanced the field further, and, combined with the important implications of endocytosis on drug responses, this makes endocytosis an obvious parameter to include in molecular pharmacological characterization of ligand-GPCR interactions. SIGNIFICANCE STATEMENT: G protein-coupled receptor (GPCR) endocytosis is an important means to terminate receptor signaling, and arrestins play a central role in the widely accepted classical paradigm of GPCR endocytosis. In contrast to the canonical arrestin-mediated internalization, an increasing number of GPCRs are found to be endocytosed via alternate pathways, and the process appears more diverse than the previously defined "one pathway fits all."
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Affiliation(s)
- Ee Von Moo
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Jeffrey R van Senten
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Hans Bräuner-Osborne
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Thor C Møller
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
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14
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Poque E, Ruigrok HJ, Arnaud-Cormos D, Habauzit D, Chappe Y, Martin C, De Gannes FP, Hurtier A, Garenne A, Lagroye I, Le Dréan Y, Lévêque P, Percherancier Y. Effects of radiofrequency field exposure on proteotoxic-induced and heat-induced HSF1 response in live cells using the bioluminescence resonance energy transfer technique. Cell Stress Chaperones 2021; 26:241-251. [PMID: 33067759 PMCID: PMC7736596 DOI: 10.1007/s12192-020-01172-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 01/09/2023] Open
Abstract
As of today, only acute effects of RF fields have been confirmed to represent a potential health hazard and they are attributed to non-specific heating (≥ 1 °C) under high-level exposure. Yet, the possibility that environmental RF impact living matter in the absence of temperature elevation needs further investigation. Since HSF1 is both a thermosensor and the master regulator of heat-shock stress response in eukaryotes, it remains to assess HSF1 activation in live cells under exposure to low-level RF signals. We thus measured basal, temperature-induced, and chemically induced HSF1 trimerization, a mandatory step on the cascade of HSF1 activation, under RF exposure to continuous wave (CW), Global System for Mobile (GSM), and Wi-Fi-modulated 1800 MHz signals, using a bioluminescence resonance energy transfer technique (BRET) probe. Our results show that, as expected, HSF1 is heat-activated by acute exposure of transiently transfected HEK293T cells to a CW RF field at a specific absorption rate of 24 W/kg for 30 min. However, we found no evidence of HSF1 activation under the same RF exposure condition when the cell culture medium temperature was fixed. We also found no experimental evidence that, at a fixed temperature, chronic RF exposure for 24 h at a SAR of 1.5 and 6 W/kg altered the potency or the maximal capability of the proteasome inhibitor MG132 to activate HSF1, whatever signal used. We only found that RF exposure to CW signals (1.5 and 6 W/kg) and GSM signals (1.5 W/kg) for 24 h marginally decreased basal HSF1 activity.
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Affiliation(s)
- Emmanuelle Poque
- CNRS, Bordeaux INP, CBMN laboratory, UMR5248, Bordeaux University, F-33607, Pessac, France
| | - Hermanus J Ruigrok
- CNRS, IMS laboratory, UMR5218, Bordeaux University, F-33400, Talence, France
| | - Delia Arnaud-Cormos
- CNRS, XLIM, UMR 7252, Limoges University, F-87000, Limoges, France
- Institut Universitaire de France (IUF), F-75005, Paris, France
| | - Denis Habauzit
- Institut de Recherche en Santé, Environnement et Travail (IRSET) - UMR_S 1085, Rennes University, F-35000, Rennes, France
| | - Yann Chappe
- CNRS, IMS laboratory, UMR5218, Bordeaux University, F-33400, Talence, France
| | - Catherine Martin
- Institut de Recherche en Santé, Environnement et Travail (IRSET) - UMR_S 1085, Rennes University, F-35000, Rennes, France
| | | | - Annabelle Hurtier
- CNRS, IMS laboratory, UMR5218, Bordeaux University, F-33400, Talence, France
| | - André Garenne
- CNRS, IMS laboratory, UMR5218, Bordeaux University, F-33400, Talence, France
| | - Isabelle Lagroye
- CNRS, IMS laboratory, UMR5218, Bordeaux University, F-33400, Talence, France
- Paris Sciences et Lettres Research University, F-75006, Paris, France
| | - Yves Le Dréan
- Institut de Recherche en Santé, Environnement et Travail (IRSET) - UMR_S 1085, Rennes University, F-35000, Rennes, France
| | - Philippe Lévêque
- CNRS, XLIM, UMR 7252, Limoges University, F-87000, Limoges, France
| | - Yann Percherancier
- CNRS, IMS laboratory, UMR5218, Bordeaux University, F-33400, Talence, France.
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15
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Zhuo Y, Gurevich VV, Vishnivetskiy SA, Klug CS, Marchese A. A non-GPCR-binding partner interacts with a novel surface on β-arrestin1 to mediate GPCR signaling. J Biol Chem 2020; 295:14111-14124. [PMID: 32753481 DOI: 10.1074/jbc.ra120.015074] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/29/2020] [Indexed: 12/30/2022] Open
Abstract
The multifaceted adaptor protein β-arr1 (β-arrestin1) promotes activation of focal adhesion kinase (FAK) by the chemokine receptor CXCR4, facilitating chemotaxis. This function of β-arr1 requires the assistance of the adaptor protein STAM1 (signal-transducing adaptor molecule 1) because disruption of the interaction between STAM1 and β-arr1 reduces CXCR4-mediated activation of FAK and chemotaxis. To begin to understand the mechanism by which β-arr1 together with STAM1 activates FAK, we used site-directed spin-labeling EPR spectroscopy-based studies coupled with bioluminescence resonance energy transfer-based cellular studies to show that STAM1 is recruited to activated β-arr1 by binding to a novel surface on β-arr1 at the base of the finger loop, at a site that is distinct from the receptor-binding site. Expression of a STAM1-deficient binding β-arr1 mutant that is still able to bind to CXCR4 significantly reduced CXCL12-induced activation of FAK but had no impact on ERK-1/2 activation. We provide evidence of a novel surface at the base of the finger loop that dictates non-GPCR interactions specifying β-arrestin-dependent signaling by a GPCR. This surface might represent a previously unidentified switch region that engages with effector molecules to drive β-arrestin signaling.
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Affiliation(s)
- Ya Zhuo
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Vsevolod V Gurevich
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee, USA
| | | | - Candice S Klug
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Adriano Marchese
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
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16
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Pritchard AB, Kanai SM, Krock B, Schindewolf E, Oliver-Krasinski J, Khalek N, Okashah N, Lambert NA, Tavares ALP, Zackai E, Clouthier DE. Loss-of-function of Endothelin receptor type A results in Oro-Oto-Cardiac syndrome. Am J Med Genet A 2020; 182:1104-1116. [PMID: 32133772 DOI: 10.1002/ajmg.a.61531] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 02/06/2020] [Accepted: 02/06/2020] [Indexed: 01/14/2023]
Abstract
Craniofacial morphogenesis is regulated in part by signaling from the Endothelin receptor type A (EDNRA). Pathogenic variants in EDNRA signaling pathway components EDNRA, GNAI3, PCLB4, and EDN1 cause Mandibulofacial Dysostosis with Alopecia (MFDA), Auriculocondylar syndrome (ARCND) 1, 2, and 3, respectively. However, cardiovascular development is normal in MFDA and ARCND individuals, unlike Ednra knockout mice. One explanation may be that partial EDNRA signaling remains in MFDA and ARCND, as mice with reduced, but not absent, EDNRA signaling also lack a cardiovascular phenotype. Here we report an individual with craniofacial and cardiovascular malformations mimicking the Ednra -/- mouse phenotype, including a distinctive micrognathia with microstomia and a hypoplastic aortic arch. Exome sequencing found a novel homozygous missense variant in EDNRA (c.1142A>C; p.Q381P). Bioluminescence resonance energy transfer assays revealed that this amino acid substitution in helix 8 of EDNRA prevents recruitment of G proteins to the receptor, abrogating subsequent receptor activation by its ligand, Endothelin-1. This homozygous variant is thus the first reported loss-of-function EDNRA allele, resulting in a syndrome we have named Oro-Oto-Cardiac Syndrome. Further, our results illustrate that EDNRA signaling is required for both normal human craniofacial and cardiovascular development, and that limited EDNRA signaling is likely retained in ARCND and MFDA individuals. This work illustrates a straightforward approach to identifying the functional consequence of novel genetic variants in signaling molecules associated with malformation syndromes.
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Affiliation(s)
- Amanda Barone Pritchard
- Division of Human Genetics, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Stanley M Kanai
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Bryan Krock
- Division of Genomic Diagnostics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Erica Schindewolf
- Center for Fetal Diagnosis and Treatment, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | | | - Nahla Khalek
- Center for Fetal Diagnosis and Treatment, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Najeah Okashah
- Department of Pharmacology and Toxicology, Medical College of Georgia-Augusta University, Augusta, Georgia, USA
| | - Nevin A Lambert
- Department of Pharmacology and Toxicology, Medical College of Georgia-Augusta University, Augusta, Georgia, USA
| | - Andre L P Tavares
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Elaine Zackai
- Division of Human Genetics, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - David E Clouthier
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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17
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Hoare BL, Kocan M, Bruell S, Scott DJ, Bathgate RAD. Using the novel HiBiT tag to label cell surface relaxin receptors for BRET proximity analysis. Pharmacol Res Perspect 2019; 7:e00513. [PMID: 31384473 PMCID: PMC6667744 DOI: 10.1002/prp2.513] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 07/11/2019] [Accepted: 07/16/2019] [Indexed: 12/04/2022] Open
Abstract
Relaxin family peptide 1 (RXFP1) is the receptor for relaxin a peptide hormone with important therapeutic potential. Like many G protein-coupled receptors (GPCRs), RXFP1 has been reported to form homodimers. Given the complex activation mechanism of RXFP1 by relaxin, we wondered whether homodimerization may be explicitly required for receptor activation, and therefore sought to determine if there is any relaxin-dependent change in RXFP1 proximity at the cell surface. Bioluminescence resonance energy transfer (BRET) between recombinantly tagged receptors is often used in GPCR proximity studies. RXFP1 targets poorly to the cell surface when overexpressed in cell lines, with the majority of the receptor proteins sequestered within the cell. Thus, any relaxin-induced changes in RXFP1 proximity at the cell surface may be obscured by BRET signal originating from intracellular compartments. We therefore, utilized the newly developed split luciferase system called HiBiT to specifically label the extracellular terminus of cell surface RXFP1 receptors in combination with mCitrine-tagged receptors, using the GABAB heterodimer as a positive control. This demonstrated that the BRET signal detected from RXFP1-RXFP1 proximity at the cell surface does not appear to be due to stable physical interactions. The fact that there is also no relaxin-mediated change in RXFP1-RXFP1 proximity at the cell surface further supports these conclusions. This work provides a basis by which cell surface GPCR proximity and expression levels can be specifically studied using a facile and homogeneous labeling technique such as HiBiT.
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Affiliation(s)
- Bradley L. Hoare
- Florey Institute of Neuroscience and Mental Health and Florey Department of Neuroscience and Mental HealthParkvilleVictoriaAustralia
| | - Martina Kocan
- Florey Institute of Neuroscience and Mental Health and Florey Department of Neuroscience and Mental HealthParkvilleVictoriaAustralia
| | - Shoni Bruell
- Florey Institute of Neuroscience and Mental Health and Florey Department of Neuroscience and Mental HealthParkvilleVictoriaAustralia
- Department of Biochemistry and Molecular BiologyThe University of MelbourneParkvilleVictoriaAustralia
| | - Daniel J. Scott
- Florey Institute of Neuroscience and Mental Health and Florey Department of Neuroscience and Mental HealthParkvilleVictoriaAustralia
- Department of Biochemistry and Molecular BiologyThe University of MelbourneParkvilleVictoriaAustralia
| | - Ross A. D. Bathgate
- Florey Institute of Neuroscience and Mental Health and Florey Department of Neuroscience and Mental HealthParkvilleVictoriaAustralia
- Department of Biochemistry and Molecular BiologyThe University of MelbourneParkvilleVictoriaAustralia
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18
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Kim CK, Cho KF, Kim MW, Ting AY. Luciferase-LOV BRET enables versatile and specific transcriptional readout of cellular protein-protein interactions. eLife 2019; 8:43826. [PMID: 30942168 PMCID: PMC6447360 DOI: 10.7554/elife.43826] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 03/16/2019] [Indexed: 12/21/2022] Open
Abstract
Technologies that convert transient protein-protein interactions (PPIs) into stable expression of a reporter gene are useful for genetic selections, high-throughput screening, and multiplexing with omics technologies. We previously reported SPARK (Kim et al., 2017), a transcription factor that is activated by the coincidence of blue light and a PPI. Here, we report an improved, second-generation SPARK2 that incorporates a luciferase moiety to control the light-sensitive LOV domain. SPARK2 can be temporally gated by either external light or addition of a small-molecule luciferin, which causes luciferase to open LOV via proximity-dependent BRET. Furthermore, the nested 'AND' gate design of SPARK2-in which both protease recruitment to the membrane-anchored transcription factor and LOV domain opening are regulated by the PPI of interest-yields a lower-background system and improved PPI specificity. We apply SPARK2 to high-throughput screening for GPCR agonists and for the detection of trans-cellular contacts, all with versatile transcriptional readout.
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Affiliation(s)
- Christina K Kim
- Department of Genetics, Stanford University, Stanford, United States
| | - Kelvin F Cho
- Cancer Biology Program, Stanford University, Stanford, United States
| | - Min Woo Kim
- Department of Genetics, Stanford University, Stanford, United States
| | - Alice Y Ting
- Department of Genetics, Stanford University, Stanford, United States.,Department of Biology, Stanford University, Stanford, United States.,Chan Zuckerberg Biohub, San Francisco, United States
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19
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Dale NC, Johnstone EKM, White CW, Pfleger KDG. NanoBRET: The Bright Future of Proximity-Based Assays. Front Bioeng Biotechnol 2019; 7:56. [PMID: 30972335 PMCID: PMC6443706 DOI: 10.3389/fbioe.2019.00056] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 03/04/2019] [Indexed: 12/17/2022] Open
Abstract
Bioluminescence resonance energy transfer (BRET) is a biophysical technique used to monitor proximity within live cells. BRET exploits the naturally occurring phenomenon of dipole-dipole energy transfer from a donor enzyme (luciferase) to an acceptor fluorophore following enzyme-mediated oxidation of a substrate. This results in production of a quantifiable signal that denotes proximity between proteins and/or molecules tagged with complementary luciferase and fluorophore partners. BRET assays have been used to observe an array of biological functions including ligand binding, intracellular signaling, receptor-receptor proximity, and receptor trafficking, however, BRET assays can theoretically be used to monitor the proximity of any protein or molecule for which appropriate fusion constructs and/or fluorophore conjugates can be produced. Over the years, new luciferases and approaches have been developed that have increased the potential applications for BRET assays. In particular, the development of the small, bright and stable Nanoluciferase (NanoLuc; Nluc) and its use in NanoBRET has vastly broadened the potential applications of BRET assays. These advances have exciting potential to produce new experimental methods to monitor protein-protein interactions (PPIs), protein-ligand interactions, and/or molecular proximity. In addition to NanoBRET, Nluc has also been exploited to produce NanoBiT technology, which further broadens the scope of BRET to monitor biological function when NanoBiT is combined with an acceptor. BRET has proved to be a powerful tool for monitoring proximity and interaction, and these recent advances further strengthen its utility for a range of applications.
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Affiliation(s)
- Natasha C Dale
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia.,Centre for Medical Research, The University of Western Australia, Crawley, WA, Australia.,Australian Research Council Centre for Personalised Therapeutics TechnologiesAustralia
| | - Elizabeth K M Johnstone
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia.,Centre for Medical Research, The University of Western Australia, Crawley, WA, Australia.,Australian Research Council Centre for Personalised Therapeutics TechnologiesAustralia
| | - Carl W White
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia.,Centre for Medical Research, The University of Western Australia, Crawley, WA, Australia.,Australian Research Council Centre for Personalised Therapeutics TechnologiesAustralia
| | - Kevin D G Pfleger
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia.,Centre for Medical Research, The University of Western Australia, Crawley, WA, Australia.,Australian Research Council Centre for Personalised Therapeutics TechnologiesAustralia.,Dimerix Limited, Nedlands, WA, Australia
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20
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Yakubu RR, Nieves E, Weiss LM. The Methods Employed in Mass Spectrometric Analysis of Posttranslational Modifications (PTMs) and Protein-Protein Interactions (PPIs). ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1140:169-198. [PMID: 31347048 DOI: 10.1007/978-3-030-15950-4_10] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Mass Spectrometry (MS) has revolutionized the way we study biomolecules, especially proteins, their interactions and posttranslational modifications (PTM). As such MS has established itself as the leading tool for the analysis of PTMs mainly because this approach is highly sensitive, amenable to high throughput and is capable of assigning PTMs to specific sites in the amino acid sequence of proteins and peptides. Along with the advances in MS methodology there have been improvements in biochemical, genetic and cell biological approaches to mapping the interactome which are discussed with consideration for both the practical and technical considerations of these techniques. The interactome of a species is generally understood to represent the sum of all potential protein-protein interactions. There are still a number of barriers to the elucidation of the human interactome or any other species as physical contact between protein pairs that occur by selective molecular docking in a particular spatiotemporal biological context are not easily captured and measured.PTMs massively increase the complexity of organismal proteomes and play a role in almost all aspects of cell biology, allowing for fine-tuning of protein structure, function and localization. There are an estimated 300 PTMS with a predicted 5% of the eukaryotic genome coding for enzymes involved in protein modification, however we have not yet been able to reliably map PTM proteomes due to limitations in sample preparation, analytical techniques, data analysis, and the substoichiometric and transient nature of some PTMs. Improvements in proteomic and mass spectrometry methods, as well as sample preparation, have been exploited in a large number of proteome-wide surveys of PTMs in many different organisms. Here we focus on previously published global PTM proteome studies in the Apicomplexan parasites T. gondii and P. falciparum which offer numerous insights into the abundance and function of each of the studied PTM in the Apicomplexa. Integration of these datasets provide a more complete picture of the relative importance of PTM and crosstalk between them and how together PTM globally change the cellular biology of the Apicomplexan protozoa. A multitude of techniques used to investigate PTMs, mostly techniques in MS-based proteomics, are discussed for their ability to uncover relevant biological function.
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Affiliation(s)
- Rama R Yakubu
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Edward Nieves
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Louis M Weiss
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA. .,Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA.
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21
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Bosch J. PPI inhibitor and stabilizer development in human diseases. DRUG DISCOVERY TODAY. TECHNOLOGIES 2018; 24:3-9. [PMID: 29233297 DOI: 10.1016/j.ddtec.2017.10.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 10/12/2017] [Indexed: 12/20/2022]
Abstract
All processes in living organisms are regulated by, or at least influenced by, protein-protein interactions (PPI). Membrane proteins play a fundamental part in this class of interactions: by providing inter-cellular communication and sensing capabilities to the cell, they lead to downstream regulation signaling events. It is therefore not surprising that PPI modulators are of keen interest when developing drug-like molecules for a range of diseases and medical conditions. However, techniques for exploiting PPIs in meaningful ways have only recently become readily available. This review is meant to provide a brief overview of applied techniques for PPI elucidation, and present various case studies of PPI exploitation ranging from early discovery efforts to now-approved market drugs.
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Affiliation(s)
- Jürgen Bosch
- Pediatric Pulmonology Division, Department of Pediatrics, Case Western Reserve University School of Medicine, 2109 Adelbert Rd, Biomedical Research Building Room 835, Cleveland, OH, USA; InterRayBio, LLC, Baltimore, MD, USA.
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22
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Tariqul Islam AFM, Yue H, Scavello M, Haldeman P, Rappel WJ, Charest PG. The cAMP-induced G protein subunits dissociation monitored in live Dictyostelium cells by BRET reveals two activation rates, a positive effect of caffeine and potential role of microtubules. Cell Signal 2018; 48:25-37. [PMID: 29698704 DOI: 10.1016/j.cellsig.2018.04.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/17/2018] [Accepted: 04/22/2018] [Indexed: 02/01/2023]
Abstract
To study the dynamics and mechanisms controlling activation of the heterotrimeric G protein Gα2βγ in Dictyostelium in response to stimulation by the chemoattractant cyclic AMP (cAMP), we monitored the G protein subunit interaction in live cells using bioluminescence resonance energy transfer (BRET). We found that cAMP induces the cAR1-mediated dissociation of the G protein subunits to a similar extent in both undifferentiated and differentiated cells, suggesting that only a small number of cAR1 (as expressed in undifferentiated cells) is necessary to induce the full activation of Gα2βγ. In addition, we found that treating cells with caffeine increases the potency of cAMP-induced Gα2βγ activation; and that disrupting the microtubule network but not F-actin inhibits the cAMP-induced dissociation of Gα2βγ. Thus, microtubules are necessary for efficient cAR1-mediated activation of the heterotrimeric G protein. Finally, kinetics analyses of Gα2βγ subunit dissociation induced by different cAMP concentrations indicate that there are two distinct rates at which the heterotrimeric G protein subunits dissociate when cells are stimulated with cAMP concentrations above 500 nM versus only one rate at lower cAMP concentrations. Quantitative modeling suggests that the kinetics profile of Gα2βγ subunit dissociation results from the presence of both uncoupled and G protein pre-coupled cAR1 that have differential affinities for cAMP and, consequently, induce G protein subunit dissociation through different rates. We suggest that these different signaling kinetic profiles may play an important role in initial chemoattractant gradient sensing.
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Affiliation(s)
- A F M Tariqul Islam
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721-0088, USA
| | - Haicen Yue
- Department of Physics, University of California-San Diego, La Jolla, CA 92093, USA
| | - Margarethakay Scavello
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721-0088, USA
| | - Pearce Haldeman
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721-0088, USA; Division of Biology and Biological Engineering, Joint Center for Transitional Medicine, California Institute of Technology, Pasadena, CA 91125, USA
| | - Wouter-Jan Rappel
- Department of Physics, University of California-San Diego, La Jolla, CA 92093, USA
| | - Pascale G Charest
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721-0088, USA.
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23
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Islam AFMT, Stepanski BM, Charest PG. Studying Chemoattractant Signal Transduction Dynamics in Dictyostelium by BRET. Methods Mol Biol 2017; 1407:63-77. [PMID: 27271894 DOI: 10.1007/978-1-4939-3480-5_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Understanding the dynamics of chemoattractant signaling is key to our understanding of the mechanisms underlying the directed migration of cells, including that of neutrophils to sites of infections and of cancer cells during metastasis. A model frequently used for deciphering chemoattractant signal transduction is the social amoeba Dictyostelium discoideum. However, the methods available to quantitatively measure chemotactic signaling are limited. Here, we describe a protocol to quantitatively study chemoattractant signal transduction in Dictyostelium by monitoring protein-protein interactions and conformational changes using Bioluminescence Resonance Energy Transfer (BRET).
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Affiliation(s)
- A F M Tariqul Islam
- Department of Chemistry and Biochemistry, University of Arizona, 1041 E. Lowell Street, Tucson, 85721-0088, AZ, USA
| | - Branden M Stepanski
- Department of Chemistry and Biochemistry, University of Arizona, 1041 E. Lowell Street, Tucson, 85721-0088, AZ, USA
| | - Pascale G Charest
- Department of Chemistry and Biochemistry, University of Arizona, 1041 E. Lowell Street, Tucson, 85721-0088, AZ, USA.
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24
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Kachaner D, Garrido D, Mehsen H, Normandin K, Lavoie H, Archambault V. Coupling of Polo kinase activation to nuclear localization by a bifunctional NLS is required during mitotic entry. Nat Commun 2017; 8:1701. [PMID: 29167465 PMCID: PMC5700101 DOI: 10.1038/s41467-017-01876-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 10/22/2017] [Indexed: 02/07/2023] Open
Abstract
The Polo kinase is a master regulator of mitosis and cytokinesis conserved from yeasts to humans. Polo is composed of an N-term kinase domain (KD) and a C-term polo-box domain (PBD), which regulates its subcellular localizations. The PBD and KD can interact and inhibit each other, and this reciprocal inhibition is relieved when Polo is phosphorylated at its activation loop. How Polo activation and localization are coupled during mitotic entry is unknown. Here we report that PBD binding to the KD masks a nuclear localization signal (NLS). Activating phosphorylation of the KD leads to exposure of the NLS and entry of Polo into the nucleus before nuclear envelope breakdown. Failures of this mechanism result in misregulation of the Cdk1-activating Cdc25 phosphatase and lead to mitotic and developmental defects in Drosophila. These results uncover spatiotemporal mechanisms linking master regulatory enzymes during mitotic entry. Drosophila Polo kinase is the founding member of the Polo-Like Kinase (PLK) family and a master regulator of mitosis and cytokinesis. Here the authors uncover a molecular mechanism for the spatiotemporal regulation of Polo kinase during mitotic entry through a phosphorylation event that triggers nuclear import.
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Affiliation(s)
- David Kachaner
- Institute for Research in Immunology and Cancer, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7.,Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Damien Garrido
- Institute for Research in Immunology and Cancer, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7.,Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Haytham Mehsen
- Institute for Research in Immunology and Cancer, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Karine Normandin
- Institute for Research in Immunology and Cancer, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Hugo Lavoie
- Institute for Research in Immunology and Cancer, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Vincent Archambault
- Institute for Research in Immunology and Cancer, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7. .,Département de biochimie et médecine moléculaire, Université de Montréal, C.P. 6128 Succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7.
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25
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RAF inhibitors promote RAS-RAF interaction by allosterically disrupting RAF autoinhibition. Nat Commun 2017; 8:1211. [PMID: 29084939 PMCID: PMC5662619 DOI: 10.1038/s41467-017-01274-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 09/01/2017] [Indexed: 12/19/2022] Open
Abstract
First-generation RAF inhibitors paradoxically induce ERK signaling in normal and tumor cells exhibiting RAS activity. Compound-induced RAF dimerization through stabilization of the RAF ON/active state by inhibitors has emerged as a critical contributing factor. RAF inhibitors also enhance RAS−RAF association. Although this event is thought to play a key role in priming RAF activation, the underlying mechanism is not known. Here we report that RAF inhibitors induce the disruption of intramolecular interactions between the kinase domain and its N-terminal regulatory region independently of RAS activity. This provides a molecular basis to explain the induction of RAS−RAF association by RAF inhibitors, as well as the co-operativity observed between RAS activity and RAF kinase inhibitors in driving RAF activation. Profiling of second-generation RAF inhibitors confirmed their improved mode of action, but also revealed liabilities that allowed us to discern two properties of an ideal RAF inhibitor: high-binding affinity to all RAF paralogs and maintenance of the OFF/autoinhibited state of the enzyme. RAF family kinases transmit signals from activated RAS at the plasma membrane to downstream kinases to control cell proliferation, differentiation and survival. Here the authors shed light on the molecular mechanisms whereby small molecule RAF inhibitors induce RAS-RAF association and paradoxical RAF activation.
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26
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Ruigrok HJ, Shahid G, Goudeau B, Poulletier de Gannes F, Poque-Haro E, Hurtier A, Lagroye I, Vacher P, Arbault S, Sojic N, Veyret B, Percherancier Y. Full-Spectral Multiplexing of Bioluminescence Resonance Energy Transfer in Three TRPV Channels. Biophys J 2017; 112:87-98. [PMID: 28076819 DOI: 10.1016/j.bpj.2016.11.3197] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 11/17/2016] [Accepted: 11/21/2016] [Indexed: 12/31/2022] Open
Abstract
Multiplexed bioluminescence resonance energy transfer (BRET) assays were developed to monitor the activation of several functional transient receptor potential (TRP) channels in live cells and in real time. We probed both TRPV1 intramolecular rearrangements and its interaction with Calmodulin (CaM) under activation by chemical agonists and temperature. Our BRET study also confirmed that: (1) capsaicin and heat promoted distinct transitions, independently coupled to channel gating, and that (2) TRPV1 and Ca2+-bound CaM but not Ca2+-free CaM were preassociated in resting live cells, while capsaicin activation induced both the formation of more TRPV1/CaM complexes and conformational changes. The BRET assay, based on the interaction with Calmodulin, was successfully extended to TRPV3 and TRPV4 channels. We therefore developed a full-spectral three-color BRET assay for analyzing the specific activation of each of the three TRPV channels in a single sample. Such key improvement in BRET measurement paves the way for the simultaneous monitoring of independent biological pathways in live cells.
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Affiliation(s)
- Hermanus Johannes Ruigrok
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Guillaume Shahid
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Bertrand Goudeau
- Université de Bordeaux, Talence, France; Institut des Sciences Moleculaires, Centre National de la Recherche Scientifique (CNRS) UMR 5255, NSYSA Group, ENSCBP, Pessac, France
| | - Florence Poulletier de Gannes
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Emmanuelle Poque-Haro
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Annabelle Hurtier
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Isabelle Lagroye
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France; Paris Sciences et Lettres Research University, Paris, France
| | - Pierre Vacher
- Université de Bordeaux, Talence, France; Institut National de la Santé et de la Recherche Médicale (INSERM) U1218, Institut Bergonié, Bordeaux, France
| | - Stéphane Arbault
- Université de Bordeaux, Talence, France; Institut des Sciences Moleculaires, Centre National de la Recherche Scientifique (CNRS) UMR 5255, NSYSA Group, ENSCBP, Pessac, France
| | - Neso Sojic
- Université de Bordeaux, Talence, France; Institut des Sciences Moleculaires, Centre National de la Recherche Scientifique (CNRS) UMR 5255, NSYSA Group, ENSCBP, Pessac, France
| | - Bernard Veyret
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France
| | - Yann Percherancier
- Laboratoire de l'Intégration du Matériau au Système, Centre National de la Recherche Scientifique (CNRS) UMR 5218, Talence, France; Université de Bordeaux, Talence, France.
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27
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Sokolina K, Kittanakom S, Snider J, Kotlyar M, Maurice P, Gandía J, Benleulmi-Chaachoua A, Tadagaki K, Oishi A, Wong V, Malty RH, Deineko V, Aoki H, Amin S, Yao Z, Morató X, Otasek D, Kobayashi H, Menendez J, Auerbach D, Angers S, Pržulj N, Bouvier M, Babu M, Ciruela F, Jockers R, Jurisica I, Stagljar I. Systematic protein-protein interaction mapping for clinically relevant human GPCRs. Mol Syst Biol 2017; 13:918. [PMID: 28298427 PMCID: PMC5371730 DOI: 10.15252/msb.20167430] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
G‐protein‐coupled receptors (GPCRs) are the largest family of integral membrane receptors with key roles in regulating signaling pathways targeted by therapeutics, but are difficult to study using existing proteomics technologies due to their complex biochemical features. To obtain a global view of GPCR‐mediated signaling and to identify novel components of their pathways, we used a modified membrane yeast two‐hybrid (MYTH) approach and identified interacting partners for 48 selected full‐length human ligand‐unoccupied GPCRs in their native membrane environment. The resulting GPCR interactome connects 686 proteins by 987 unique interactions, including 299 membrane proteins involved in a diverse range of cellular functions. To demonstrate the biological relevance of the GPCR interactome, we validated novel interactions of the GPR37, serotonin 5‐HT4d, and adenosine ADORA2A receptors. Our data represent the first large‐scale interactome mapping for human GPCRs and provide a valuable resource for the analysis of signaling pathways involving this druggable family of integral membrane proteins.
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Affiliation(s)
- Kate Sokolina
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | | | - Jamie Snider
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | - Max Kotlyar
- Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Pascal Maurice
- Inserm, U1016, Institut Cochin, Paris, France.,CNRS UMR 8104, Paris, France.,Sorbonne Paris Cité, University of Paris Descartes, Paris, France.,UMR CNRS 7369 Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), Université de Reims Champagne Ardenne (URCA), UFR Sciences Exactes et Naturelles, Reims, France
| | - Jorge Gandía
- Unitat de Farmacologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Abla Benleulmi-Chaachoua
- Inserm, U1016, Institut Cochin, Paris, France.,CNRS UMR 8104, Paris, France.,Sorbonne Paris Cité, University of Paris Descartes, Paris, France
| | - Kenjiro Tadagaki
- Inserm, U1016, Institut Cochin, Paris, France.,CNRS UMR 8104, Paris, France.,Sorbonne Paris Cité, University of Paris Descartes, Paris, France
| | - Atsuro Oishi
- Inserm, U1016, Institut Cochin, Paris, France.,CNRS UMR 8104, Paris, France.,Sorbonne Paris Cité, University of Paris Descartes, Paris, France
| | - Victoria Wong
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | - Ramy H Malty
- Department of Biochemistry, Research and Innovation Centre, University of Regina, Regina, SK, Canada
| | - Viktor Deineko
- Department of Biochemistry, Research and Innovation Centre, University of Regina, Regina, SK, Canada
| | - Hiroyuki Aoki
- Department of Biochemistry, Research and Innovation Centre, University of Regina, Regina, SK, Canada
| | - Shahreen Amin
- Department of Biochemistry, Research and Innovation Centre, University of Regina, Regina, SK, Canada
| | - Zhong Yao
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | - Xavier Morató
- Unitat de Farmacologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - David Otasek
- Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Hiroyuki Kobayashi
- Department of Biochemistry, Institute for Research in Immunology & Cancer, Université de Montréal, Montréal, QC, Canada
| | | | | | - Stephane Angers
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy and Department of Biochemistry, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Natasa Pržulj
- Department of Computing, University College London, London, UK
| | - Michel Bouvier
- Department of Biochemistry, Institute for Research in Immunology & Cancer, Université de Montréal, Montréal, QC, Canada
| | - Mohan Babu
- Department of Biochemistry, Research and Innovation Centre, University of Regina, Regina, SK, Canada
| | - Francisco Ciruela
- Unitat de Farmacologia, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina, IDIBELL, Universitat de Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.,Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Ralf Jockers
- Inserm, U1016, Institut Cochin, Paris, France.,CNRS UMR 8104, Paris, France.,Sorbonne Paris Cité, University of Paris Descartes, Paris, France
| | - Igor Jurisica
- Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON, Canada.,Departments of Medical Biophysics and Computer Science, University of Toronto, Toronto, ON, Canada.,Institute of Neuroimmunology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Igor Stagljar
- Donnelly Centre, University of Toronto, Toronto, ON, Canada .,Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.,Department of Biochemistry, University of Toronto, Toronto, ON, Canada
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28
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Robichaux WG, Branham-O'Connor M, Hwang IY, Vural A, Kehrl JH, Blumer JB. Regulation of Chemokine Signal Integration by Activator of G-Protein Signaling 4 (AGS4). J Pharmacol Exp Ther 2017; 360:424-433. [PMID: 28062526 DOI: 10.1124/jpet.116.238436] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 12/28/2016] [Indexed: 12/15/2022] Open
Abstract
Activator of G-protein signaling 4 (AGS4)/G-protein signaling modulator 3 (Gpsm3) contains three G-protein regulatory (GPR) motifs, each of which can bind Gαi-GDP free of Gβγ We previously demonstrated that the AGS4-Gαi interaction is regulated by seven transmembrane-spanning receptors (7-TMR), which may reflect direct coupling of the GPR-Gαi module to the receptor analogous to canonical Gαβγ heterotrimer. We have demonstrated that the AGS4-Gαi complex is regulated by chemokine receptors in an agonist-dependent manner that is receptor-proximal. As an initial approach to investigate the functional role(s) of this regulated interaction in vivo, we analyzed leukocytes, in which AGS4/Gpsm3 is predominantly expressed, from AGS4/Gpsm3-null mice. Loss of AGS4/Gpsm3 resulted in mild but significant neutropenia and leukocytosis. Dendritic cells, T lymphocytes, and neutrophils from AGS4/Gpsm3-null mice also exhibited significant defects in chemoattractant-directed chemotaxis and extracellular signal-regulated kinase activation. An in vivo peritonitis model revealed a dramatic reduction in the ability of AGS4/Gpsm3-null neutrophils to migrate to primary sites of inflammation. Taken together, these data suggest that AGS4/Gpsm3 is required for proper chemokine signal processing in leukocytes and provide further evidence for the importance of the GPR-Gαi module in the regulation of leukocyte function.
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Affiliation(s)
- William G Robichaux
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina (W.G.R., M.B.-O., J.B.B.); and B-Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (I.-Y.H., A.V., J.H.K.)
| | - Melissa Branham-O'Connor
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina (W.G.R., M.B.-O., J.B.B.); and B-Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (I.-Y.H., A.V., J.H.K.)
| | - Il-Young Hwang
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina (W.G.R., M.B.-O., J.B.B.); and B-Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (I.-Y.H., A.V., J.H.K.)
| | - Ali Vural
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina (W.G.R., M.B.-O., J.B.B.); and B-Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (I.-Y.H., A.V., J.H.K.)
| | - Johne H Kehrl
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina (W.G.R., M.B.-O., J.B.B.); and B-Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (I.-Y.H., A.V., J.H.K.)
| | - Joe B Blumer
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Department of Neurosciences, Medical University of South Carolina, Charleston, South Carolina (W.G.R., M.B.-O., J.B.B.); and B-Cell Molecular Immunology Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland (I.-Y.H., A.V., J.H.K.)
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29
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Zhan Y, Zhang G, Wang X, Qi Y, Bai S, Li D, Ma T, Sartor O, Flemington EK, Zhang H, Lee P, Dong Y. Interplay between Cytoplasmic and Nuclear Androgen Receptor Splice Variants Mediates Castration Resistance. Mol Cancer Res 2017; 15:59-68. [PMID: 27671337 PMCID: PMC5215946 DOI: 10.1158/1541-7786.mcr-16-0236] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/06/2016] [Accepted: 09/13/2016] [Indexed: 11/16/2022]
Abstract
Androgen receptor splice variants (AR-V) are implicated in resistance of prostate cancer to androgen-directed therapies. When expressed alone in cells, some AR-Vs (e.g., AR-V7) localize primarily to the nucleus, whereas others (e.g., AR-V1, AR-V4, and AR-V6) localize mainly to the cytoplasm. Significantly, the latter are often coexpressed with the nucleus-predominant AR-Vs and the full-length AR (AR-FL). An important question to be addressed is whether the cytoplasmic-localized AR-Vs play a role in castration-resistant prostate cancer (CRPC) through interaction with the nucleus-predominant AR-Vs and AR-FL. Here, it is demonstrated that AR-V1, -V4, and -V6 can dimerize with both AR-V7 and AR-FL. Consequently, AR-V7 and androgen-bound AR-FL induced nuclear localization of AR-V1, -V4, and -V6, and these variants, in turn, mitigated the ability of the antiandrogen enzalutamide to inhibit androgen-induced AR-FL nuclear localization. Interestingly, the impact of nuclear localization of AR-V4 and -V6 on AR transactivation differs from that of AR-V1. Nuclear localization leads to an increased ability of AR-V4 and -V6 to transactivate both canonical AR targets and AR-V-specific targets and to confer castration-resistant cell growth. However, although AR-V1, which lacks inherent transcriptional activity, appears to activate AR-FL in an androgen-independent manner, it significantly antagonizes AR-V7 transactivation. Together, these data demonstrate that the complex interactions among different AR-Vs and AR-FL play a significant role in castration-resistant disease. IMPLICATIONS This study suggests important consequences for clinical castration resistance due to simultaneous expression of AR-FL and AR-Vs in patient tumors and suggests that dissecting these interactions should help develop effective strategies to disrupt AR-V signaling. Mol Cancer Res; 15(1); 59-68. ©2016 AACR.
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Affiliation(s)
- Yang Zhan
- College of Life Sciences, National Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun, China
- Department of Structural and Cellular Biology, Tulane Cancer Center, New Orleans, Louisiana
| | - Guanyi Zhang
- Department of Pathology and Laboratory Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Xiaojie Wang
- College of Life Sciences, National Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun, China
| | - Yanfeng Qi
- Department of Structural and Cellular Biology, Tulane Cancer Center, New Orleans, Louisiana
| | - Shanshan Bai
- College of Life Sciences, National Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun, China
- Department of Structural and Cellular Biology, Tulane Cancer Center, New Orleans, Louisiana
| | - Dongying Li
- Department of Pathology and Laboratory Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Tianfang Ma
- College of Life Sciences, National Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun, China
- Department of Structural and Cellular Biology, Tulane Cancer Center, New Orleans, Louisiana
| | - Oliver Sartor
- Department of Urology, Tulane Cancer Center, New Orleans, Louisiana
- Department of Medicine, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Erik K Flemington
- Department of Pathology and Laboratory Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Haitao Zhang
- Department of Pathology and Laboratory Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Peng Lee
- Department of Pathology, New York University School of Medicine, New York, New York.
| | - Yan Dong
- College of Life Sciences, National Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun, China.
- Department of Structural and Cellular Biology, Tulane Cancer Center, New Orleans, Louisiana
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30
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Namkung Y, Le Gouill C, Lukashova V, Kobayashi H, Hogue M, Khoury E, Song M, Bouvier M, Laporte SA. Monitoring G protein-coupled receptor and β-arrestin trafficking in live cells using enhanced bystander BRET. Nat Commun 2016; 7:12178. [PMID: 27397672 PMCID: PMC4942582 DOI: 10.1038/ncomms12178] [Citation(s) in RCA: 188] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 06/08/2016] [Indexed: 12/14/2022] Open
Abstract
Endocytosis and intracellular trafficking of receptors are pivotal to maintain physiological functions and drug action; however, robust quantitative approaches are lacking to study such processes in live cells. Here we present new bioluminescence resonance energy transfer (BRET) sensors to quantitatively monitor G protein-coupled receptors (GPCRs) and β-arrestin trafficking. These sensors are based on bystander BRET and use the naturally interacting chromophores luciferase (RLuc) and green fluorescent protein (rGFP) from Renilla. The versatility and robustness of this approach are exemplified by anchoring rGFP at the plasma membrane or in endosomes to generate high dynamic spectrometric BRET signals on ligand-promoted recruitment or sequestration of RLuc-tagged proteins to, or from, specific cell compartments, as well as sensitive subcellular BRET imaging for protein translocation visualization. These sensors are scalable to high-throughput formats and allow quantitative pharmacological studies of GPCR trafficking in real time, in live cells, revealing ligand-dependent biased trafficking of receptor/β-arrestin complexes. Cellular signaling processes often involve trafficking of receptors and other proteins between subcellular compartments. Here the authors demonstrate a method based on the concept of Enhanced bystander Bioluminescence Resonance Energy Transfer (EbBRET) that allows efficient real time monitoring of endocytosis and trafficking.
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Affiliation(s)
- Yoon Namkung
- Department of Medicine, Research Institute of the McGill University Health Center (RI-MUHC), McGill University, Montréal, Québec, Canada H4A 3J1
| | - Christian Le Gouill
- Department of Biochemistry and Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, Québec, Canada H3C 1J4
| | - Viktoria Lukashova
- Department of Biochemistry and Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, Québec, Canada H3C 1J4
| | - Hiroyuki Kobayashi
- Department of Biochemistry and Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, Québec, Canada H3C 1J4
| | - Mireille Hogue
- Department of Biochemistry and Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, Québec, Canada H3C 1J4
| | - Etienne Khoury
- Department of Medicine, Research Institute of the McGill University Health Center (RI-MUHC), McGill University, Montréal, Québec, Canada H4A 3J1
| | - Mideum Song
- Department of Medicine, Research Institute of the McGill University Health Center (RI-MUHC), McGill University, Montréal, Québec, Canada H4A 3J1
| | - Michel Bouvier
- Department of Biochemistry and Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, Québec, Canada H3C 1J4
| | - Stéphane A Laporte
- Department of Medicine, Research Institute of the McGill University Health Center (RI-MUHC), McGill University, Montréal, Québec, Canada H4A 3J1.,Department of Pharmacology and Therapeutics, McGill University, Montréal, Québec, Canada H3G 1Y6.,Department of Anatomy and Cell Biology, McGill University, Montréal, Québec, Canada H3A 0C7
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31
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Frixel S, Lotz-Havla AS, Kern S, Kaltenborn E, Wittmann T, Gersting SW, Muntau AC, Zarbock R, Griese M. Homooligomerization of ABCA3 and its functional significance. Int J Mol Med 2016; 38:558-66. [PMID: 27352740 DOI: 10.3892/ijmm.2016.2650] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 05/11/2016] [Indexed: 11/06/2022] Open
Abstract
ABCA3 is a surfactant lipid transporter in the limiting membrane of lamellar bodies in alveolar type II cells. Mutations in the ATP-binding cassette, sub-family A (ABC1), member 3 (ABCA3) gene cause respiratory distress syndrome in newborns, and chronic interstitial lung disease in children and adults. ABCA3 belongs to the class of full ABC transporters, which are supposed to be functional in their monomeric forms. Although other family members e.g., ABCA1 and ABCC7 have been shown to function as oligomers, the oligomerization state of ABCA3 is unknown. In the present study, the oligomerization of ABCA3 was investigated in cell lysates and crude membrane preparations from transiently and stably transfected 293 cells using blue native PAGE (BN-PAGE), gel filtration and co-immunoprecipitation. Additionally, homooligomerization was examined in vivo in cells using bioluminescence resonance energy transfer (BRET). Using BN-PAGE and gel filtration, we demonstrate that non-denatured ABCA3 exists in different oligomeric forms, with monomers (45%) and tetramers (30%) being the most abundant forms. Furthermore, we also show the existence of 20% dimers and 5% trimers. BRET analyses verified intermolecular interactions in vivo. Our results also demonstrated that the arrest of ABCA3 in the endoplasmic reticulum (ER), either through drug treatment or induced by mutations in ABCA3, inhibited the propensity of the protein to form dimers. Based on our results, we suggest that transporter oligomerization is crucial for ABCA3 function and that a disruption of oligomerization due to mutations represents a novel pathomechanism in ABCA3-associated lung disease.
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Affiliation(s)
- Sabrina Frixel
- German Centre for Lung Research, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
| | - Amelie S Lotz-Havla
- Department of Molecular Pediatrics, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
| | - Sunčana Kern
- German Centre for Lung Research, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
| | - Eva Kaltenborn
- German Centre for Lung Research, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
| | - Thomas Wittmann
- German Centre for Lung Research, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
| | - Søren W Gersting
- Department of Molecular Pediatrics, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
| | - Ania C Muntau
- University Children's Hospital, University Medical Center Hamburg-Eppendorf, D-20246 Hamburg, Germany
| | - Ralf Zarbock
- German Centre for Lung Research, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
| | - Matthias Griese
- German Centre for Lung Research, Dr von Hauner Children's Hospital, Ludwig-Maximilians University, D-80337 Munich, Germany
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32
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Tian X, Irannejad R, Bowman SL, Du Y, Puthenveedu MA, von Zastrow M, Benovic JL. The α-Arrestin ARRDC3 Regulates the Endosomal Residence Time and Intracellular Signaling of the β2-Adrenergic Receptor. J Biol Chem 2016; 291:14510-25. [PMID: 27226565 DOI: 10.1074/jbc.m116.716589] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Indexed: 01/12/2023] Open
Abstract
Arrestin domain-containing protein 3 (ARRDC3) is a member of the mammalian α-arrestin family, which is predicted to share similar tertiary structure with visual-/β-arrestins and also contains C-terminal PPXY motifs that mediate interaction with E3 ubiquitin ligases. Recently, ARRDC3 has been proposed to play a role in regulating the trafficking of G protein-coupled receptors, although mechanistic insight into this process is lacking. Here, we focused on characterizing the role of ARRDC3 in regulating the trafficking of the β2-adrenergic receptor (β2AR). We find that ARRDC3 primarily localizes to EEA1-positive early endosomes and directly interacts with the β2AR in a ligand-independent manner. Although ARRDC3 has no effect on β2AR endocytosis or degradation, it negatively regulates β2AR entry into SNX27-occupied endosomal tubules. This results in delayed recycling of the receptor and a concomitant increase in β2AR-dependent endosomal signaling. Thus, ARRDC3 functions as a switch to modulate the endosomal residence time and subsequent intracellular signaling of the β2AR.
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Affiliation(s)
- Xufan Tian
- From the Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Roshanak Irannejad
- the Department of Psychiatry, University of California at San Francisco, San Francisco, California 94158
| | - Shanna L Bowman
- the Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, and
| | - Yang Du
- the Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California 94305
| | - Manojkumar A Puthenveedu
- the Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, and
| | - Mark von Zastrow
- the Department of Psychiatry, University of California at San Francisco, San Francisco, California 94158
| | - Jeffrey L Benovic
- From the Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107,
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33
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Buntru A, Trepte P, Klockmeier K, Schnoegl S, Wanker EE. Current Approaches Toward Quantitative Mapping of the Interactome. Front Genet 2016; 7:74. [PMID: 27200083 PMCID: PMC4854875 DOI: 10.3389/fgene.2016.00074] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 04/18/2016] [Indexed: 01/01/2023] Open
Abstract
Protein–protein interactions (PPIs) play a key role in many, if not all, cellular processes. Disease is often caused by perturbation of PPIs, as recently indicated by studies of missense mutations. To understand the associations of proteins and to unravel the global picture of PPIs in the cell, different experimental detection techniques for PPIs have been established. Genetic and biochemical methods such as the yeast two-hybrid system or affinity purification-based approaches are well suited to high-throughput, proteome-wide screening and are mainly used to obtain qualitative results. However, they have been criticized for not reflecting the cellular situation or the dynamic nature of PPIs. In this review, we provide an overview of various genetic methods that go beyond qualitative detection and allow quantitative measuring of PPIs in mammalian cells, such as dual luminescence-based co-immunoprecipitation, Förster resonance energy transfer or luminescence-based mammalian interactome mapping with bait control. We discuss the strengths and weaknesses of different techniques and their potential applications in biomedical research.
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Affiliation(s)
| | - Philipp Trepte
- Max Delbrueck Center for Molecular Medicine Berlin, Germany
| | | | | | - Erich E Wanker
- Max Delbrueck Center for Molecular Medicine Berlin, Germany
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34
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Kern A, Mavrikaki M, Ullrich C, Albarran-Zeckler R, Brantley AF, Smith RG. Hippocampal Dopamine/DRD1 Signaling Dependent on the Ghrelin Receptor. Cell 2016; 163:1176-1190. [PMID: 26590421 DOI: 10.1016/j.cell.2015.10.062] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 09/17/2015] [Accepted: 10/26/2015] [Indexed: 12/24/2022]
Abstract
The ghrelin receptor (GHSR1a) and dopamine receptor-1 (DRD1) are coexpressed in hippocampal neurons, yet ghrelin is undetectable in the hippocampus; therefore, we sought a function for apo-GHSR1a. Real-time single-molecule analysis on hippocampal neurons revealed dimerization between apo-GHSR1a and DRD1 that is enhanced by DRD1 agonism. In addition, proximity measurements support formation of preassembled apo-GHSR1a:DRD1:Gαq heteromeric complexes in hippocampal neurons. Activation by a DRD1 agonist produced non-canonical signal transduction via Gαq-PLC-IP3-Ca(2+) at the expense of canonical DRD1 Gαs cAMP signaling to result in CaMKII activation, glutamate receptor exocytosis, synaptic reorganization, and expression of early markers of hippocampal synaptic plasticity. Remarkably, this pathway is blocked by genetic or pharmacological inactivation of GHSR1a. In mice, GHSR1a inactivation inhibits DRD1-mediated hippocampal behavior and memory. Our findings identify a previously unrecognized mechanism essential for DRD1 initiation of hippocampal synaptic plasticity that is dependent on GHSR1a, and independent of cAMP signaling.
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Affiliation(s)
- Andras Kern
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, FL 33458, USA.
| | - Maria Mavrikaki
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Celine Ullrich
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Rosie Albarran-Zeckler
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Alicia Faruzzi Brantley
- Department of Neuroscience and Behavioral Core, The Scripps Research Institute, Jupiter, FL 33458, USA
| | - Roy G Smith
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, FL 33458, USA.
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35
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Pal K, Hwang SH, Somatilaka B, Badgandi H, Jackson PK, DeFea K, Mukhopadhyay S. Smoothened determines β-arrestin-mediated removal of the G protein-coupled receptor Gpr161 from the primary cilium. J Cell Biol 2016; 212:861-75. [PMID: 27002170 PMCID: PMC4810300 DOI: 10.1083/jcb.201506132] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 02/11/2016] [Indexed: 02/08/2023] Open
Abstract
Dynamic changes in membrane protein composition of the primary cilium are central to development and homeostasis, but we know little about mechanisms regulating membrane protein flux. Stimulation of the sonic hedgehog (Shh) pathway in vertebrates results in accumulation and activation of the effector Smoothened within cilia and concomitant disappearance of a negative regulator, the orphan G protein-coupled receptor (GPCR), Gpr161. Here, we describe a two-step process determining removal of Gpr161 from cilia. The first step involves β-arrestin recruitment by the signaling competent receptor, which is facilitated by the GPCR kinase Grk2. An essential factor here is the ciliary trafficking and activation of Smoothened, which by increasing Gpr161-β-arrestin binding promotes Gpr161 removal, both during resting conditions and upon Shh pathway activation. The second step involves clathrin-mediated endocytosis, which functions outside of the ciliary compartment in coordinating Gpr161 removal. Mechanisms determining dynamic compartmentalization of Gpr161 in cilia define a new paradigm for down-regulation of GPCRs during developmental signaling from a specialized subcellular compartment.
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Affiliation(s)
- Kasturi Pal
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Sun-Hee Hwang
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Bandarigoda Somatilaka
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Hemant Badgandi
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Peter K Jackson
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305
| | - Kathryn DeFea
- Division of Biomedical Sciences, University of California, Riverside, Riverside, CA 92521
| | - Saikat Mukhopadhyay
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390
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36
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Negative Regulation of CARD11 Signaling and Lymphoma Cell Survival by the E3 Ubiquitin Ligase RNF181. Mol Cell Biol 2015; 36:794-808. [PMID: 26711259 DOI: 10.1128/mcb.00876-15] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 12/15/2015] [Indexed: 12/23/2022] Open
Abstract
NF-κB activation downstream of antigen receptor engagement is a highly regulated event required for lymphocyte activation during the adaptive immune response. The pathway is often dysregulated in lymphoma, leading to constitutive NF-κB activity that supports the aberrant proliferation of transformed lymphocytes. To identify novel regulators of antigen receptor signaling to NF-κB, we developed bioluminescence resonance energy transfer-based interaction cloning (BRIC), a screening strategy that can detect protein-protein interactions in live mammalian cells in a high-throughput manner. Using this strategy, we identified the RING finger protein RNF181 as an interactor of CARD11, a key signaling scaffold in the antigen receptor pathway. We present evidence that RNF181 functions as an E3 ubiquitin ligase to inhibit antigen receptor signaling to NF-κB downstream of CARD11. The levels of the obligate signaling protein Bcl10 are reduced by RNF181 even prior to signaling, and Bcl10 can serve as a substrate for RNF181 E3 ligase activity in vitro. Furthermore, RNF181 limits the proliferation of human diffuse large B cell lymphoma cells that depend upon aberrant CARD11 signaling to NF-κB for growth and survival in culture. Our results define a new regulatory checkpoint that can modulate the output of CARD11 signaling to NF-κB in both normal and transformed lymphocytes.
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37
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Abstract
Since their discovery, G protein-coupled receptors (GPCRs) constitute one of the most studied proteins leading to important discoveries and perspectives in terms of their biology and implication in physiology and pathophysiology. This is mostly linked to the remarkable advances in the development and application of the biophysical resonance energy transfer (RET)-based approaches, including bioluminescence and fluorescence resonance energy transfer (BRET and FRET, respectively). Indeed, BRET and FRET have been extensively applied to study different aspects of GPCR functioning such as their activation and regulation either statically or dynamically, in real-time and intact cells. Consequently, our view on GPCRs has considerably changed opening new challenges for the study of GPCRs in their native tissues in the aim to get more knowledge on how these receptors control the biological responses. Moreover, the technological aspect of this field of research promises further developments for robust and reliable new RET-based assays that may be compatible with high-throughput screening as well as drug discovery programs.
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Affiliation(s)
- Mohammed Akli Ayoub
- Biologie et Bioinformatique des Systèmes de Signalisation, Institut National de la Recherche Agronomique, UMR85, Unité Physiologie de la Reproduction et des Comportements; CNRS, UMR7247, Nouzilly, France; LE STUDIUM(®) Loire Valley Institute for Advanced Studies, Orléans, France.
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38
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Snider J, Kotlyar M, Saraon P, Yao Z, Jurisica I, Stagljar I. Fundamentals of protein interaction network mapping. Mol Syst Biol 2015; 11:848. [PMID: 26681426 PMCID: PMC4704491 DOI: 10.15252/msb.20156351] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Studying protein interaction networks of all proteins in an organism (“interactomes”) remains one of the major challenges in modern biomedicine. Such information is crucial to understanding cellular pathways and developing effective therapies for the treatment of human diseases. Over the past two decades, diverse biochemical, genetic, and cell biological methods have been developed to map interactomes. In this review, we highlight basic principles of interactome mapping. Specifically, we discuss the strengths and weaknesses of individual assays, how to select a method appropriate for the problem being studied, and provide general guidelines for carrying out the necessary follow‐up analyses. In addition, we discuss computational methods to predict, map, and visualize interactomes, and provide a summary of some of the most important interactome resources. We hope that this review serves as both a useful overview of the field and a guide to help more scientists actively employ these powerful approaches in their research.
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Affiliation(s)
- Jamie Snider
- Donnelly Centre, Department of Biochemistry, Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Max Kotlyar
- Princess Margaret Cancer Center, IBM Life Sciences Discovery Centre, University Health Network, Ontario, Canada
| | - Punit Saraon
- Donnelly Centre, Department of Biochemistry, Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Zhong Yao
- Donnelly Centre, Department of Biochemistry, Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Igor Jurisica
- Princess Margaret Cancer Center, IBM Life Sciences Discovery Centre, University Health Network, Ontario, Canada
| | - Igor Stagljar
- Donnelly Centre, Department of Biochemistry, Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
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Mendoza-Sanchez R, Cotnoir-White D, Kulpa J, Jutras I, Pottel J, Moitessier N, Mader S, Gleason JL. Design, synthesis and evaluation of antiestrogen and histone deacetylase inhibitor molecular hybrids. Bioorg Med Chem 2015; 23:7597-606. [DOI: 10.1016/j.bmc.2015.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 10/28/2015] [Accepted: 11/05/2015] [Indexed: 01/28/2023]
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40
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Ismail S, Dubois-Vedrenne I, Laval M, Tikhonova IG, D'Angelo R, Sanchez C, Clerc P, Gherardi MJ, Gigoux V, Magnan R, Fourmy D. Internalization and desensitization of the human glucose-dependent-insulinotropic receptor is affected by N-terminal acetylation of the agonist. Mol Cell Endocrinol 2015. [PMID: 26225752 DOI: 10.1016/j.mce.2015.07.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
How incretins regulate presence of their receptors at the cell surface and their activity is of paramount importance for the development of therapeutic strategies targeting these receptors. We have studied internalization of the human Glucose-Insulinotropic Polypeptide receptor (GIPR). GIP stimulated rapid robust internalization of the GIPR, the major part being directed to lysosomes. GIPR internalization involved mainly clathrin-coated pits, AP-2 and dynamin. However, neither GIPR C-terminal region nor β-arrestin1/2 was required. Finally, N-acetyl-GIP recognized as a dipeptidyl-IV resistant analogue, fully stimulated cAMP production with a ∼15-fold lower potency than GIP and weakly stimulated GIPR internalization and desensitization of cAMP response. Furthermore, docking N-acetyl-GIP in the binding site of modeled GIPR showed slighter interactions with residues of helices 6 and 7 of GIPR compared to GIP. Therefore, incomplete or partial activity of N-acetyl-GIP on signaling involved in GIPR desensitization and internalization contributes to the enhanced incretin activity of this peptide.
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Affiliation(s)
- Sadek Ismail
- Université de Toulouse 3, EA 4552, Inserm U1048/I2MC, Toulouse, France
| | | | - Marie Laval
- Université de Toulouse 3, EA 4552, Inserm U1048/I2MC, Toulouse, France
| | - Irina G Tikhonova
- Molecular Therapeutics, School of Pharmacy, Queen's University of Belfast, North Ireland, UK
| | - Romina D'Angelo
- Cellular Imaging Facility Rangueil, Inserm U1048/I2MC, Toulouse, France
| | - Claire Sanchez
- Université de Toulouse 3, EA 4552, Inserm U1048/I2MC, Toulouse, France
| | - Pascal Clerc
- Université de Toulouse 3, EA 4552, Inserm U1048/I2MC, Toulouse, France
| | | | - Véronique Gigoux
- Université de Toulouse 3, EA 4552, Inserm U1048/I2MC, Toulouse, France
| | - Remi Magnan
- Université de Toulouse 3, EA 4552, Inserm U1048/I2MC, Toulouse, France
| | - Daniel Fourmy
- Université de Toulouse 3, EA 4552, Inserm U1048/I2MC, Toulouse, France.
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41
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Donthamsetti P, Quejada JR, Javitch JA, Gurevich VV, Lambert NA. Using Bioluminescence Resonance Energy Transfer (BRET) to Characterize Agonist-Induced Arrestin Recruitment to Modified and Unmodified G Protein-Coupled Receptors. ACTA ACUST UNITED AC 2015; 70:2.14.1-2.14.14. [PMID: 26331887 DOI: 10.1002/0471141755.ph0214s70] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
G protein-coupled receptors (GPCRs) represent ∼25% of current drug targets. Ligand binding to these receptors activates G proteins and arrestins, which are involved in differential signaling pathways. Because functionally selective or biased ligands activate one of these two pathways, they may be superior medications for certain diseases states. The identification of such ligands requires robust drug screening assays for both G protein and arrestin activity. This unit describes protocols for two bioluminescence resonance energy transfer (BRET)-based assays used to monitor arrestin recruitment to GPCRs. One assay requires modification of GPCRs by fusion to a BRET donor or acceptor moiety, whereas the other can detect arrestin recruitment to unmodified GPCRs.
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Affiliation(s)
- Prashant Donthamsetti
- Departments of Psychiatry and Pharmacology, Columbia University College of Physicians and Surgeons, New York, New York.,Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, New York
| | - Jose Rafael Quejada
- Departments of Psychiatry and Pharmacology, Columbia University College of Physicians and Surgeons, New York, New York.,Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, New York
| | - Jonathan A Javitch
- Departments of Psychiatry and Pharmacology, Columbia University College of Physicians and Surgeons, New York, New York.,Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, New York
| | | | - Nevin A Lambert
- Department of Pharmacology and Toxicology, Medical College of Georgia, Georgia Regents University, Augusta, Georgia
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42
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Xu D, Zhan Y, Qi Y, Cao B, Bai S, Xu W, Gambhir SS, Lee P, Sartor O, Flemington EK, Zhang H, Hu CD, Dong Y. Androgen Receptor Splice Variants Dimerize to Transactivate Target Genes. Cancer Res 2015; 75:3663-71. [PMID: 26060018 DOI: 10.1158/0008-5472.can-15-0381] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 05/27/2015] [Indexed: 11/16/2022]
Abstract
Constitutively active androgen receptor splice variants (AR-V) lacking the ligand-binding domain have been implicated in the pathogenesis of castration-resistant prostate cancer and in mediating resistance to newer drugs that target the androgen axis. AR-V regulates expression of both canonical AR targets and a unique set of cancer-specific targets that are enriched for cell-cycle functions. However, little is known about how AR-V controls gene expression. Here, we report that two major AR-Vs, termed AR-V7 and AR(v567es), not only homodimerize and heterodimerize with each other but also heterodimerize with full-length androgen receptor (AR-FL) in an androgen-independent manner. We found that heterodimerization of AR-V and AR-FL was mediated by N- and C-terminal interactions and by the DNA-binding domain of each molecule, whereas AR-V homodimerization was mediated only by DNA-binding domain interactions. Notably, AR-V dimerization was required to transactivate target genes and to confer castration-resistant cell growth. Our results clarify the mechanism by which AR-Vs mediate gene regulation and provide a pivotal pathway for rational drug design to disrupt AR-V signaling as a rational strategy for the effective treatment of advanced prostate cancer.
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Affiliation(s)
- Duo Xu
- College of Life Sciences, Jilin University, Changchun, China. Department of Structural and Cellular Biology, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana. School of Nursing, Jilin University, Changchun, China
| | - Yang Zhan
- Department of Structural and Cellular Biology, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Yanfeng Qi
- Department of Structural and Cellular Biology, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Bo Cao
- College of Life Sciences, Jilin University, Changchun, China. Department of Structural and Cellular Biology, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Shanshan Bai
- College of Life Sciences, Jilin University, Changchun, China. Department of Structural and Cellular Biology, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Wei Xu
- McArdle Laboratory for Cancer Research, University of Wisconsin, Madison, Wisconsin
| | - Sanjiv S Gambhir
- Bio-X Program and Department of Radiology, Stanford University School of Medicine, Stanford, California
| | - Peng Lee
- Department of Pathology, New York University School of Medicine, New York, New York
| | - Oliver Sartor
- Department of Urology, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana. Department of Medicine, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Erik K Flemington
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Haitao Zhang
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana
| | - Chang-Deng Hu
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana
| | - Yan Dong
- College of Life Sciences, Jilin University, Changchun, China. Department of Structural and Cellular Biology, Tulane University School of Medicine, Tulane Cancer Center, New Orleans, Louisiana. National Engineering Laboratory for AIDS Vaccine, Jilin University, Changchun, China.
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43
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BRET evidence that β2 adrenergic receptors do not oligomerize in cells. Sci Rep 2015; 5:10166. [PMID: 25955971 PMCID: PMC4424835 DOI: 10.1038/srep10166] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/01/2015] [Indexed: 11/29/2022] Open
Abstract
Bioluminescence resonance energy transfer (BRET) is often used to study association of membrane proteins, and in particular oligomerization of G protein-coupled receptors (GPCRs). Oligomerization of class A GPCRs is controversial, in part because the methods used to study this question are not completely understood. Here we reconsider oligomerization of the class A β2 adrenergic receptor (β2AR), and reevaluate BRET titration as a method to study membrane protein association. Using inducible expression of the energy acceptor at multiple levels of donor expression we find that BRET between β2AR protomers is directly proportional to the density of the acceptor up to ~3,000 acceptors μm−2, and does not depend on the density of the donor or on the acceptor:donor (A:D) stoichiometry. In contrast, BRET between tightly-associating control proteins does not depend on the density of the acceptor, but does depend on the density of the donor and on the A:D ratio. We also find that the standard frameworks used to interpret BRET titration experiments rely on simplifying assumptions that are frequently invalid. These results suggest that β2ARs do not oligomerize in cells, and demonstrate a reliable method of assessing membrane protein association with BRET.
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44
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Hwang IY, Park C, Harrison K, Boularan C, Galés C, Kehrl JH. An essential role for RGS protein/Gαi2 interactions in B lymphocyte-directed cell migration and trafficking. THE JOURNAL OF IMMUNOLOGY 2015; 194:2128-39. [PMID: 25617475 DOI: 10.4049/jimmunol.1401952] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Chemokines engage B lymphocyte surface receptors, triggering heterotrimeric G protein Gαi subunit guanine nucleotide exchange. RGS proteins limit the duration that Gαi subunits remain GTP bound, and the loss of an individual RGS protein typically enhances chemokine receptor signaling. In this study, we show that B cells carrying a Gαi2 (G184S/G184S) mutation that disables all RGS protein/Gαi2 interactions exhibit an unexpectedly severe reduction in chemokine receptor signaling. The Gαi2 (G184S/G184S) B cells have markedly elevated basal calcium levels, but poor chemokine-induced increases, enhanced nonspecific migration, but extremely poor chemotaxis. In striking contrast, the Gαi2 (G184S/G184S) B cells exhibited enhanced sensitivity to sphingosine 1-phosphate (S1P). S1P elicited heightened intracellular calcium responses and enhanced S1P-triggered cell migration. Mice with the Gαi2 (G184S/G184S) mutation displayed excessive numbers of germinal center-like structures; abnormal serum Ig profiles; and aberrant B lymphocyte trafficking. These findings establish an essential role for RGS proteins in B cell chemoattractant signaling and for the proper position of B lymphocytes in lymphoid organs.
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Affiliation(s)
- Il-Young Hwang
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Chung Park
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Kathleen Harrison
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Cedric Boularan
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and INSERM U1048, Institut des Maladies Métaboliques et Cardiovasculaires, 31432 Toulouse Cedex 4, France
| | - Céline Galés
- INSERM U1048, Institut des Maladies Métaboliques et Cardiovasculaires, 31432 Toulouse Cedex 4, France
| | - John H Kehrl
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
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Ng HKH, Chow BKC. Oligomerization of Family B GPCRs: Exploration in Inter-Family Oligomer Formation. Front Endocrinol (Lausanne) 2015; 6:10. [PMID: 25699019 PMCID: PMC4313782 DOI: 10.3389/fendo.2015.00010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 01/16/2015] [Indexed: 11/13/2022] Open
Abstract
G-protein-coupled receptors (GPCRs) are classified into A to F subfamilies in which only families A, B, and C are present in mammals. Some of these GPCRs were found to form higher ordered structures such as oligomers with the discovery of interacting receptors in the form of homomers or heteromers. The importance of these oligomers on regulating receptor functions has recently been an intense research focus. It has been proposed that receptor oligomer formation has impact on its physiological importance on receptor trafficking, signaling, ligand-related regulation, and also is related to certain diseases. The present body of knowledge, however, comprises mainly intra-family oligomers formation and their consequences. Inter-family oligomers are recognized but there is limited information. This article aims to provide a current view regarding inter-family GPCR oligomerization in the subfamilies A, B, and C found in mammals.
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Affiliation(s)
- Hans K. H. Ng
- Department of Endocrinology, School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Billy K. C. Chow
- Department of Endocrinology, School of Biological Sciences, The University of Hong Kong, Hong Kong, China
- *Correspondence: Billy K. C. Chow, Endocrinology, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China e-mail:
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46
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Stoichiometry and geometry of the CXC chemokine receptor 4 complex with CXC ligand 12: molecular modeling and experimental validation. Proc Natl Acad Sci U S A 2014; 111:E5363-72. [PMID: 25468967 DOI: 10.1073/pnas.1417037111] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Chemokines and their receptors regulate cell migration during development, immune system function, and in inflammatory diseases, making them important therapeutic targets. Nevertheless, the structural basis of receptor:chemokine interaction is poorly understood. Adding to the complexity of the problem is the persistently dimeric behavior of receptors observed in cell-based studies, which in combination with structural and mutagenesis data, suggest several possibilities for receptor:chemokine complex stoichiometry. In this study, a combination of computational, functional, and biophysical approaches was used to elucidate the stoichiometry and geometry of the interaction between the CXC-type chemokine receptor 4 (CXCR4) and its ligand CXCL12. First, relevance and feasibility of a 2:1 stoichiometry hypothesis was probed using functional complementation experiments with multiple pairs of complementary nonfunctional CXCR4 mutants. Next, the importance of dimers of WT CXCR4 was explored using the strategy of dimer dilution, where WT receptor dimerization is disrupted by increasing expression of nonfunctional CXCR4 mutants. The results of these experiments were supportive of a 1:1 stoichiometry, although the latter could not simultaneously reconcile existing structural and mutagenesis data. To resolve the contradiction, cysteine trapping experiments were used to derive residue proximity constraints that enabled construction of a validated 1:1 receptor:chemokine model, consistent with the paradigmatic two-site hypothesis of receptor activation. The observation of a 1:1 stoichiometry is in line with accumulating evidence supporting monomers as minimal functional units of G protein-coupled receptors, and suggests transmission of conformational changes across the dimer interface as the most probable mechanism of altered signaling by receptor heterodimers.
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Abstract
The signal peptide peptidase (SPP)-related intramembrane aspartyl proteases are a homologous group of polytopic membrane proteins, some of which function in innate or adaptive immunity by cleaving proteins involved in antigen presentation or intracellular signaling. Signal peptide peptidase-like 3 (SPPL3) is a poorly characterized endoplasmic reticulum (ER)-localized member of this family, with no validated cellular substrates. We report here the isolation of SPPL3 in a screen for activators of NFAT, a transcription factor that controls lymphocyte development and function. We find that SPPL3 is required downstream of T cell receptor engagement for maximal Ca(2+) influx and NFAT activation. Surprisingly, the proteolytic activity of SPPL3 is not required for its role in this pathway. SPPL3 enhances the signal-induced association of stromal interaction molecule 1 (STIM1) and Orai1 and is even required for the full activity of constitutively active STIM1 variants that bind Orai1 independently of ER Ca(2+) release. SPPL3 associates with STIM1 through at least two independent domains, the transmembrane region and the CRAC activation domain (CAD), and can promote the association of the STIM1 CAD with Orai1. Our results assign a function in lymphocyte signaling to SPPL3 and highlight the emerging importance of nonproteolytic functions for members of the intramembrane aspartyl protease family.
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48
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Beautrait A, Michalski KR, Lopez TS, Mannix KM, McDonald DJ, Cutter AR, Medina CB, Hebert AM, Francis CJ, Bouvier M, Tesmer JJG, Sterne-Marr R. Mapping the putative G protein-coupled receptor (GPCR) docking site on GPCR kinase 2: insights from intact cell phosphorylation and recruitment assays. J Biol Chem 2014; 289:25262-75. [PMID: 25049229 PMCID: PMC4155688 DOI: 10.1074/jbc.m114.593178] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
G protein-coupled receptor kinases (GRKs) phosphorylate agonist-occupied receptors initiating the processes of desensitization and β-arrestin-dependent signaling. Interaction of GRKs with activated receptors serves to stimulate their kinase activity. The extreme N-terminal helix (αN), the kinase small lobe, and the active site tether (AST) of the AGC kinase domain have previously been implicated in mediating the allosteric activation. Expanded mutagenesis of the αN and AST allowed us to further assess the role of these two regions in kinase activation and receptor phosphorylation in vitro and in intact cells. We also developed a bioluminescence resonance energy transfer-based assay to monitor the recruitment of GRK2 to activated α2A-adrenergic receptors (α2AARs) in living cells. The bioluminescence resonance energy transfer signal exhibited a biphasic response to norepinephrine concentration, suggesting that GRK2 is recruited to Gβγ and α2AAR with EC50 values of 15 nm and 8 μm, respectively. We show that mutations in αN (L4A, V7E, L8E, V11A, S12A, Y13A, and M17A) and AST (G475I, V477D, and I485A) regions impair or potentiate receptor phosphorylation and/or recruitment. We suggest that a surface of GRK2, including Leu4, Val7, Leu8, Val11, and Ser12, directly interacts with receptors, whereas residues such as Asp10, Tyr13, Ala16, Met17, Gly475, Val477, and Ile485 are more important for kinase domain closure and activation. Taken together with data on GRK1 and GRK6, our data suggest that all three GRK subfamilies make conserved interactions with G protein-coupled receptors, but there may be unique interactions that influence selectivity.
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Affiliation(s)
- Alexandre Beautrait
- From the Department of Biochemistry and the Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | | | | | | | | | | | | | | | | | - Michel Bouvier
- From the Department of Biochemistry and the Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - John J G Tesmer
- the Departments of Pharmacology and Biological Chemistry, Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109
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Stephens B, Handel TM. Chemokine receptor oligomerization and allostery. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2014; 115:375-420. [PMID: 23415099 DOI: 10.1016/b978-0-12-394587-7.00009-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Oligomerization of chemokine receptors has been reported to influence many aspects of receptor function through allosteric communication between receptor protomers. Allosteric interactions within chemokine receptor hetero-oligomers have been shown to cause negative cooperativity in the binding of chemokines and to inhibit receptor activation in the case of some receptor pairs. Other receptor pairs can cause enhanced signaling and even activate entirely new, hetero-oligomer-specific signaling complexes and responses downstream of receptor activation. Many mechanisms contribute to these effects including direct allosteric coupling between the receptors, G protein-mediated allostery, G protein stealing, ligand sequestration, and recruitment of new intracellular proteins by exposing unique binding interfaces on the oligomerized receptors. These effects present both challenges as well as exciting opportunities for drug discovery. One of the most difficult challenges will involve determining if and when hetero-oligomers versus homomeric receptors are involved in specific disease states.
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Affiliation(s)
- Bryan Stephens
- Skaggs School of Pharmacy and Pharmaceutical Science, University of California, San Diego, La Jolla, California, USA
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50
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Fuxe K, Borroto-Escuela DO, Ciruela F, Guidolin D, Agnati LF. Receptor-receptor interactions in heteroreceptor complexes: a new principle in biology. Focus on their role in learning and memory. ACTA ACUST UNITED AC 2014. [DOI: 10.7243/2052-6946-2-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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