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Mendoza-Hoffmann F, Guo C, Song Y, Feng D, Yang L, Wüthrich K. 19F-NMR studies of the impact of different detergents and nanodiscs on the A 2A adenosine receptor. JOURNAL OF BIOMOLECULAR NMR 2024; 78:31-37. [PMID: 38072902 DOI: 10.1007/s10858-023-00430-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/07/2023] [Indexed: 04/02/2024]
Abstract
For the A2A adenosine receptor (A2AAR), a class A G-protein-coupled receptor (GPCR), reconstituted in n-dodecyl-β-D-maltoside (DDM)/cholesteryl hemisuccinate (CHS) mixed micelles, previous 19F-NMR studies revealed the presence of multiple simultaneously populated conformational states. Here, we study the influence of a different detergent, lauryl maltose neopentyl glycol (LMNG) in mixed micelles with CHS, and of lipid bilayer nanodiscs on these conformational equilibria. The populations of locally different substates are pronouncedly different in DDM/CHS and LMNG/CHS micelles, whereas the A2AAR conformational manifold in LMNG/CHS micelles is closely similar to that in the lipid bilayer nanodiscs. Considering that nanodiscs represent a closer match of the natural lipid bilayer membrane, these observations support that LMNG/CHS micelles are a good choice for reconstitution trials of class A GPCRs for NMR studies in solution.
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Affiliation(s)
- Francisco Mendoza-Hoffmann
- iHuman Institute, ShanghaiTech University, Shanghai, 201210, China
- Faculty of Chemistry Sciences and Engineering, Autonomous University of Baja California (UABC), Tijuana, México
| | - Canyong Guo
- iHuman Institute, ShanghaiTech University, Shanghai, 201210, China
- School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Yanzhuo Song
- iHuman Institute, ShanghaiTech University, Shanghai, 201210, China
- DGI Tech (Qingdao) Co., Ltd., Qingdao, China
| | - Dandan Feng
- iHuman Institute, ShanghaiTech University, Shanghai, 201210, China
- School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Lingyun Yang
- iHuman Institute, ShanghaiTech University, Shanghai, 201210, China
| | - Kurt Wüthrich
- iHuman Institute, ShanghaiTech University, Shanghai, 201210, China.
- Department of Integrative Structural and Computational Biology, Scripps Research, La Jolla, CA, USA.
- Institute of Molecular Biology and Biophysics, ETH Zürich, Zürich, Switzerland.
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2
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Miller RM, Sescil J, Sarcinella MC, Bailey RC, Wang W. Accessible and Generalizable in Vitro Luminescence Assay for Detecting GPCR Activation. ACS MEASUREMENT SCIENCE AU 2023; 3:337-343. [PMID: 37868356 PMCID: PMC10588934 DOI: 10.1021/acsmeasuresciau.3c00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/11/2023] [Accepted: 06/20/2023] [Indexed: 10/24/2023]
Abstract
G protein-coupled receptors (GPCRs) serve critical physiological roles as the most abundant family of receptors. Here, we describe the design of a generalizable and cell lysate-based method that leverages the interaction between an agonist-activated GPCR and a conformation-specific binder to reconstitute split nanoluciferase (NanoLuc) in vitro. This tool, In vitro GPCR split NanoLuc ligand Triggered Reporter (IGNiTR), has broad applications. We have demonstrated IGNiTR's use with three Gs-coupled GPCRs, two Gi-coupled GPCRs and three classes of conformation-specific binders: nanobodies, miniG proteins, and G protein peptidomimetics. As an in vitro method, IGNiTR enables the use of synthetic G protein peptidomimetics and provides easily scalable and portable reagents for characterizing GPCRs and ligands. We tested three diverse applications of IGNiTR: (1) proof-of-concept GPCR ligand screening using dopamine receptor D1 IGNiTR; (2) detection of opioids for point-of-care testing; and (3) characterizing GPCR functionality during Nanodisc-based reconstitution processes. Due to IGNiTR's unique advantages and the convenience of its cell lysate-based format, this tool will find extensive applications in GPCR ligand detection, screening, and GPCR characterization.
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Affiliation(s)
- Ruby M. Miller
- Life Sciences
Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jennifer Sescil
- Life Sciences
Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Marina C. Sarcinella
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ryan C. Bailey
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Wenjing Wang
- Life Sciences
Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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3
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Kim HJ, Chang HK, Lee YM, Heo K. Catecholamines Promote Ovarian Cancer Progression through Secretion of CXC-Chemokines. Int J Mol Sci 2023; 24:14104. [PMID: 37762405 PMCID: PMC10532075 DOI: 10.3390/ijms241814104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
Considerable evidence has accumulated in the last decade supporting the notion that chronic stress is closely related to the growth, metastasis, and angiogenesis of ovarian cancer. In this study, we analyzed the conditioned media in SKOV3 ovarian cancer cell lines treated with catecholamines to identify secreted proteins responding to chronic stress. Here, we observed that epinephrine and norepinephrine enhanced the secretion and mRNA expression of CXC-chemokines (CXCL1, 2, 3, and 8). Neutralizing antibodies to CXCL8 and CXCL8 receptor (CXCR2) inhibitors significantly reduced catecholamine-mediated invasion of SKOV3 cells. Finally, we found that the concentration of CXCL1 and CXCL8 in the plasma of ovarian cancer patients increased with stage progression. Taken together, these findings suggest that stress-related catecholamines may influence ovarian cancer progression through the secretion of CXC-chemokines.
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Affiliation(s)
- Hyun Jung Kim
- Department of Biopharmaceutical Chemistry, Kookmin University, Seoul 02707, Republic of Korea; (H.J.K.); (Y.M.L.)
- Biopharmaceutical Chemistry Major, School of Applied Chemistry, Kookmin University, Seoul 02707, Republic of Korea
- Antibody Research Institute, Kookmin University, Seoul 02707, Republic of Korea
| | - Ha Kyun Chang
- Department of Obstetrics and Gynecology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan 15355, Republic of Korea;
| | - Yul Min Lee
- Department of Biopharmaceutical Chemistry, Kookmin University, Seoul 02707, Republic of Korea; (H.J.K.); (Y.M.L.)
| | - Kyun Heo
- Department of Biopharmaceutical Chemistry, Kookmin University, Seoul 02707, Republic of Korea; (H.J.K.); (Y.M.L.)
- Biopharmaceutical Chemistry Major, School of Applied Chemistry, Kookmin University, Seoul 02707, Republic of Korea
- Antibody Research Institute, Kookmin University, Seoul 02707, Republic of Korea
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4
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Kim SO, Kim SG, Ahn H, Yoo J, Jang J, Park TH. Ni-rGO Sensor Combined with Human Olfactory Receptor-Embedded Nanodiscs for Detecting Gas-Phase DMMP as a Simulant of Nerve Agents. ACS Sens 2023; 8:3095-3103. [PMID: 37555584 DOI: 10.1021/acssensors.3c00744] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Nerve agents are organophosphorus toxic chemicals that can inhibit acetylcholinesterase, leading to paralysis of the nervous system and death. Early detection of nerve agents is important for safety issues. Dimethyl methylphosphonate (DMMP) is widely used as a simulant of nerve agents, and many studies have been conducted using DMMP as a substitute for detecting nerve agents. Despite many studies on sensors for detecting DMMP, they have limitations in sensitivity and selectivity. To overcome these limitations, a nickel-decorated reduced graphene oxide (Ni-rGO) sensor with human olfactory receptor hOR2T7 nanodiscs was utilized to create a bioelectronic nose platform for DMMP gas detection. hOR2T7 was produced and reconstituted into nanodiscs for enhancing the sensor's stability, especially for detection in a gas phase. It could detect DMMP gas selectively and repeatedly at a concentration of 1 ppb. This sensitive and selective bioelectronic nose can be applied as a practical tool for the detection of gaseous chemical warfare agents in military and safety fields.
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Affiliation(s)
- So-Ong Kim
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Sung Gun Kim
- Samsung Electronics, San #16 Banwol-Dong, Hwasung, Gyeonggi-do 18448, Republic of Korea
| | - Hyenjin Ahn
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Jin Yoo
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Jyongsik Jang
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Tai Hyun Park
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea
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5
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Haueis L, Stech M, Schneider E, Lanz T, Hebel N, Zemella A, Kubick S. Rapid One-Step Capturing of Native, Cell-Free Synthesized and Membrane-Embedded GLP-1R. Int J Mol Sci 2023; 24:ijms24032808. [PMID: 36769142 PMCID: PMC9917595 DOI: 10.3390/ijms24032808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/05/2023] Open
Abstract
G protein-coupled receptors (GPCRs) are of outstanding pharmacological interest as they are abundant in cell membranes where they perform diverse functions that are closely related to the vitality of cells. The analysis of GPCRs in natural membranes is laborious, as established methods are almost exclusively cell culture-based and only a few methods for immobilization in a natural membrane outside the cell are known. Within this study, we present a one-step, fast and robust immobilization strategy of the GPCR glucagon-like peptide 1 receptor (GLP-1R). GLP-1R was synthesized in eukaryotic lysates harboring endogenous endoplasmic reticulum-derived microsomes enabling the embedment of GLP-1R in a natural membrane. Interestingly, we found that these microsomes spontaneously adsorbed to magnetic Neutravidin beads thus providing immobilized membrane protein preparations which required no additional manipulation of the target receptor or its supporting membrane. The accessibility of the extracellular domain of membrane-embedded and bead-immobilized GLP-1R was demonstrated by bead-based enzyme-linked immunosorbent assay (ELISA) using GLP-1R-specific monoclonal antibodies. In addition, ligand binding of immobilized GLP-1R was verified in a radioligand binding assay. In summary, we present an easy and straightforward synthesis and immobilization methodology of an active GPCR which can be beneficial for studying membrane proteins in general.
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Affiliation(s)
- Lisa Haueis
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Str. 24–25, 14476 Potsdam, Germany
| | - Marlitt Stech
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
- Correspondence:
| | | | - Thorsten Lanz
- 3B Pharmaceuticals GmbH, Magnusstraße 11, 12489 Berlin, Germany
| | - Nicole Hebel
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Anne Zemella
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Stefan Kubick
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Thielallee 63, 14195 Berlin, Germany
- Faculty of Health Sciences, Joint Faculty of the Brandenburg University of Technology Cottbus–Senftenberg, the Brandenburg Medical School Theodor Fontane and the University of Potsdam, 14476 Potsdam, Germany
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6
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Oligomerization of the heteromeric γ-aminobutyric acid receptor GABA B in a eukaryotic cell-free system. Sci Rep 2022; 12:20742. [PMID: 36456667 PMCID: PMC9715706 DOI: 10.1038/s41598-022-24885-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 11/22/2022] [Indexed: 12/03/2022] Open
Abstract
Understanding the assembly mechanism and function of membrane proteins is a fundamental problem in biochemical research. Among the membrane proteins, G protein-coupled receptors (GPCRs) represent the largest class in the human body and have long been considered to function as monomers. Nowadays, the oligomeric assembly of GPCRs is widely accepted, although the functional importance and therapeutic intervention remain largely unexplored. This is partly due to difficulties in the heterologous production of membrane proteins. Cell-free protein synthesis (CFPS) with its endogenous endoplasmic reticulum-derived structures has proven as a technique to address this issue. In this study, we investigate for the first time the conceptual CFPS of a heteromeric GPCR, the γ-aminobutyric acid receptor type B (GABAB), from its protomers BR1 and BR2 using a eukaryotic cell-free lysate. Using a fluorescence-based proximity ligation assay, we provide evidence for colocalization and thus suggesting heterodimerization. We prove the heterodimeric assembly by a bioluminescence resonance energy transfer saturation assay providing the manufacturability of a heterodimeric GPCR by CFPS. Additionally, we show the binding of a fluorescent orthosteric antagonist, demonstrating the feasibility of combining the CFPS of GPCRs with pharmacological applications. These results provide a simple and powerful experimental platform for the synthesis of heteromeric GPCRs and open new perspectives for the modelling of protein-protein interactions. Accordingly, the presented technology enables the targeting of protein assemblies as a new interface for pharmacological intervention in disease-relevant dimers.
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7
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Meikle TG, Keizer DW, Separovic F, Yao S. A solution NMR view of Lipidic Cubic Phases: Structure, dynamics, and beyond. BBA ADVANCES 2022; 2:100062. [PMID: 37082598 PMCID: PMC10074910 DOI: 10.1016/j.bbadva.2022.100062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 10/30/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022] Open
Abstract
Nuclear magnetic resonance (NMR) spectroscopy is well-established nowadays for the elucidation of the 3D structures of proteins and protein complexes, the evaluation of biomolecular dynamics with atomistic resolution across a range of time scales, the screening of drug candidates with site specificity, and for the quantitation of molecular translational diffusion. Lyotropic lipidic cubic phases (LCPs) are lipid bilayer-based materials with a complex geometry, formed via the spontaneous self-assembly of certain lipids in an aqueous environment at specific temperature ranges. LCPs have been successfully applied to the in meso crystallization of membrane proteins for structural studies by X-ray crystallography, and have also shown promising potential for serving as matrices for drug and nutrient delivery/release in vivo. The characterization of the structural and dynamics properties of LCPs is of significant interest for the application of these materials. Here we present a systematic review detailing the characterization of LCPs by solution NMR. Using LCPs formed by monoolein (MO) as an example, various aspects of LCPs readily accessible by solution NMR are covered, including spectral perturbation in the presence of additives, quantification of hydration levels, 13C relaxation-based measurements for studying atom-specific dynamics along the MO hydrocarbon chain, PGSE NMR measurement of translational diffusion and its correlation with release profiles, and the encapsulation of soluble proteins in LCPs. A brief discussion of future perspectives for the characterization of LCPs by solution NMR is also presented.
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8
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Wireless portable bioelectronic nose device for multiplex monitoring toward food freshness/spoilage. Biosens Bioelectron 2022; 215:114551. [PMID: 35839622 DOI: 10.1016/j.bios.2022.114551] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/22/2022] [Accepted: 07/05/2022] [Indexed: 01/07/2023]
Abstract
Monitoring food freshness/spoilage is important to ensure food quality and safety. Current methods of food quality monitoring are mostly time-consuming and labor intensive processes that require massive analytical equipment. In this study, we developed a portable bioelectronic nose (BE-nose) integrated with trace amine-associated receptor (TAAR) nanodiscs (NDs), allowing food quality monitoring via the detection of food spoilage indicators, including the biogenic amines cadaverine (CV) and putrescine (PT). The olfactory receptors TAAR13c and TAAR13d, which have specific affinities for CV and PT, were produced and successfully reconstituted in ND structures. TAAR13 NDs BE-nose-based side-gated field-effect transistor (SG-FET) system was constructed by utilizing a graphene micropattern (GM) into which two types of olfactory NDs (TAAR13c ND and TAAR13d ND) were introduced, and this system showed ultrahigh sensitivity for a limit of detection (LOD) of 1 fM for CV and PT. Moreover, the binding affinities between the TAAR13 NDs and the indicators were confirmed by a tryptophan fluorescence quenching assay and biosimulations, in which the specific binding site was confirmed. Gas-phase indicators were detected by the TAAR13 NDs BE-nose platform, and the LODs for CV and PT were confirmed to be 26.48 and 7.29 ppb, respectively. In addition, TAAR13 NDs BE-nose was fabricated with commercial gas sensors as a portable platform for the measurement of NH3 and H2S, multiplexed monitoring was achieved with similar performance, and the change ratio of the indicators was observed in a real sample. The integration of commercial gas sensors on a BE-nose enhanced the accuracy and reliability for the quality monitoring of real food samples. These results indicate that the portable TAAR13 NDs BE-nose can be used to monitor CV and PT over a wide range of concentrations, therefore, the electronic nose platform can be utilized for monitoring the freshness/spoilage step in various foods.
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9
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Lo CH, Zeng J. Application of polymersomes in membrane protein study and drug discovery: Progress, strategies, and perspectives. Bioeng Transl Med 2022; 8:e10350. [PMID: 36684106 PMCID: PMC9842050 DOI: 10.1002/btm2.10350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/08/2022] [Accepted: 05/10/2022] [Indexed: 01/25/2023] Open
Abstract
Membrane proteins (MPs) play key roles in cellular signaling pathways and are responsible for intercellular and intracellular interactions. Dysfunctional MPs are directly related to the pathogenesis of various diseases, and they have been exploited as one of the most sought-after targets in the pharmaceutical industry. However, working with MPs is difficult given that their amphiphilic nature requires protection from biological membrane or membrane mimetics. Polymersomes are bilayered nano-vesicles made of self-assembled block copolymers that have been widely used as cell membrane mimetics for MP reconstitution and in engineering of artificial cells. This review highlights the prevailing trend in the application of polymersomes in MP study and drug discovery. We begin with a review on the techniques for synthesis and characterization of polymersomes as well as methods of MP insertion to form proteopolymersomes. Next, we review the structural and functional analysis of the different types of MPs reconstituted in polymersomes, including membrane transport proteins, MP complexes, and membrane receptors. We then summarize the factors affecting reconstitution efficiency and the quality of reconstituted MPs for structural and functional studies. Additionally, we discuss the potential in using proteopolymersomes as platforms for high-throughput screening (HTS) in drug discovery to identify modulators of MPs. We conclude by providing future perspectives and recommendations on advancing the study of MPs and drug development using proteopolymersomes.
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Affiliation(s)
- Chih Hung Lo
- Lee Kong Chian School of MedicineNanyang Technological UniversitySingaporeSingapore,Department of Neurology, Brigham and Women's Hospital, Harvard Medical SchoolBostonMassachusettsUSA
| | - Jialiu Zeng
- Lee Kong Chian School of MedicineNanyang Technological UniversitySingaporeSingapore,Department of Biomedical EngineeringBoston UniversityBostonMassachusettsUSA,Department of ChemistryBoston UniversityBostonMassachusettsUSA
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10
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G Protein-coupled Receptor (GPCR) Reconstitution and Labeling for Solution Nuclear Magnetic Resonance (NMR) Studies of the Structural Basis of Transmembrane Signaling. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27092658. [PMID: 35566006 PMCID: PMC9101874 DOI: 10.3390/molecules27092658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/14/2022] [Accepted: 04/14/2022] [Indexed: 11/17/2022]
Abstract
G protein-coupled receptors (GPCRs) are a large membrane protein family found in higher organisms, including the human body. GPCRs mediate cellular responses to diverse extracellular stimuli and thus control key physiological functions, which makes them important targets for drug design. Signaling by GPCRs is related to the structure and dynamics of these proteins, which are modulated by extrinsic ligands as well as by intracellular binding partners such as G proteins and arrestins. Here, we review some basics of using nuclear magnetic resonance (NMR) spectroscopy in solution for the characterization of GPCR conformations and intermolecular interactions that relate to transmembrane signaling.
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11
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Choi YR, Shim J, Park JH, Kim YS, Kim MJ. Discovery of Orphan Olfactory Receptor 6M1 as a New Anticancer Target in MCF-7 Cells by a Combination of Surface Plasmon Resonance-Based and Cell-Based Systems. SENSORS 2021; 21:s21103468. [PMID: 34065710 PMCID: PMC8156394 DOI: 10.3390/s21103468] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022]
Abstract
Olfactory receptors (ORs) account for 49% of all G protein-coupled receptors (GPCRs), which are important targets for drug discovery, and hence ORs may also be potential drug targets. Various ORs are expressed in breast cancer cells; however, most of them are orphan receptors, and thus, their functions are unknown. Herein, we present an experimental strategy using a surface plasmon resonance (SPR) system and a cell-based assay that allowed the identification of orphan OR6M1 as a new anticancer target in the MCF-7 breast cancer cell line. After the construction of stable OR6M1-expressing cells, the SPR-based screening of 108 chemicals for ligand activity was performed against OR6M1-expressing whole cells (primary screening) or membrane fragments (secondary screening). As a result, anthraquinone (AQ) and rutin were discovered to be new OR6M1 ligands. Based on calcium imaging in OR6M1-expressing Hana3A cells, AQ and rutin were classified as an OR6M1 agonist and antagonist, respectively. Cell viability and live/dead assays showed that AQ induced the death of MCF-7 cells, which was inhibited by rutin. Therefore, OR6M1 may be considered an anticancer target, and AQ may be considered a chemotherapeutic agent. This combined method can be widely used to discover the ligands and functions of other orphan GPCRs.
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Affiliation(s)
- Yae Rim Choi
- Research Group of Natural Materials and Metabolism, Korea Food Research Institute, Wanju 55365, Korea; (Y.R.C.); (J.S.)
- Department of Food Science and Engineering, Ewha Womans University, Seoul 03760, Korea;
| | - Jaewon Shim
- Research Group of Natural Materials and Metabolism, Korea Food Research Institute, Wanju 55365, Korea; (Y.R.C.); (J.S.)
- Department of Biochemistry, Collage of Medicine, Kosin University, Busan 49267, Korea
| | - Jae-Ho Park
- Research Group of Healthcare, Korea Food Research Institute, Wanju 55365, Korea;
| | - Young-Suk Kim
- Department of Food Science and Engineering, Ewha Womans University, Seoul 03760, Korea;
| | - Min Jung Kim
- Research Group of Natural Materials and Metabolism, Korea Food Research Institute, Wanju 55365, Korea; (Y.R.C.); (J.S.)
- Correspondence: ; Tel.: +82-63-219-9380
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12
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Chmielińska A, Stepien P, Bonarek P, Girych M, Enkavi G, Rog T, Dziedzicka-Wasylewska M, Polit A. Can di-4-ANEPPDHQ reveal the structural differences between nanodiscs and liposomes? BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2021; 1863:183649. [PMID: 33991503 DOI: 10.1016/j.bbamem.2021.183649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 03/15/2021] [Accepted: 05/10/2021] [Indexed: 11/17/2022]
Abstract
The potential-sensitive di-4-ANEPPDHQ dye is presently gaining popularity in structural studies of the lipid bilayer. Within the bilayer, dye environmental sensitivity originates from the excitation induced charge redistribution and is usually attributed to solvent relaxation. Here, di-4-ANEPPDHQ is utilized to compare the structure of neutral and negatively charged lipid bilayers between two model systems: the nanodiscs and the liposomes. Using the well-established approach of measuring solvatochromic shifts of the steady-state spectra to study the bilayer structural changes has proved insufficient in this case. By applying an in-depth analysis of time-resolved fluorescence decays and emission spectra, we distinguished and characterized two and three distinct emissive di-4-ANEPPDHQ species in the liposomes and the nanodiscs, respectively. These emissive species were ascribed to the dual emission of the dye rather than to solvent relaxation. An additional, long-lived component present in the nanodiscs was associated with a unique domain of high order, postulated recently. Our results reveal that the di-4-ANEPPDHQ steady-state fluorescence should be interpreted with caution. With the experimental approach presented here, the di-4-ANEPPDHQ sensitivity was improved. We confirmed that the bilayer structure is, indeed, altered in the nanodiscs. Moreover, molecular dynamic simulations showed a distribution of the probe in the nanodiscs plane, which is sensitive to lipid composition. In POPC nanodiscs, probe frequently interacts with MSP, while in POPC-POPG nanodiscs, such interactions are rare. We did not observe, however, any impact of those interactions on the probe fluorescence.
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Affiliation(s)
- Anna Chmielińska
- Faculty of Biochemistry Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Piotr Stepien
- Faculty of Biochemistry Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Piotr Bonarek
- Faculty of Biochemistry Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Mykhailo Girych
- Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2, 00014 Helsinki, Finland
| | - Giray Enkavi
- Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2, 00014 Helsinki, Finland
| | - Tomasz Rog
- Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2, 00014 Helsinki, Finland
| | - Marta Dziedzicka-Wasylewska
- Faculty of Biochemistry Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Agnieszka Polit
- Faculty of Biochemistry Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland.
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Heim B, Handrick R, Hartmann MD, Kiefer H. Refolding and characterization of two G protein-coupled receptors purified from E. coli inclusion bodies. PLoS One 2021; 16:e0247689. [PMID: 33626080 PMCID: PMC7904181 DOI: 10.1371/journal.pone.0247689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/10/2021] [Indexed: 11/18/2022] Open
Abstract
Aiming at streamlining GPCR production from E. coli inclusion bodies for structural analysis, we present a generic approach to assess and optimize refolding yield through thermostability analysis. Since commonly used hydrophobic dyes cannot be applied as probes for membrane protein unfolding, we adapted a technique based on reacting cysteins exposed upon thermal denaturation with fluorescent 7-Diethylamino-3-(4-maleimidophenyl)-4-methylcoumarin (CPM). Successful expression, purification and refolding is shown for two G protein-coupled receptors (GPCR), the sphingosine-1-phosphate receptor S1P1, and the orphan receptor GPR3. Refolded receptors were subjected to lipidic cubic phase crystallization screening.
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Affiliation(s)
- Bastian Heim
- Institute of Applied Biotechnology, University of Applied Sciences, Biberach, Germany
- * E-mail:
| | - René Handrick
- Institute of Applied Biotechnology, University of Applied Sciences, Biberach, Germany
| | | | - Hans Kiefer
- Institute of Applied Biotechnology, University of Applied Sciences, Biberach, Germany
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14
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Mondal S, Narayan KB, Powers I, Botterbusch S, Baumgart T. Endophilin recruitment drives membrane curvature generation through coincidence detection of GPCR loop interactions and negative lipid charge. J Biol Chem 2021; 296:100140. [PMID: 33268381 PMCID: PMC7948419 DOI: 10.1074/jbc.ra120.016118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 11/25/2020] [Accepted: 12/01/2020] [Indexed: 12/23/2022] Open
Abstract
Endophilin plays key roles during endocytosis of cellular receptors, including generating membrane curvature to drive internalization. Electrostatic interactions between endophilin's BIN/Amphiphysin/Rvs domain and anionic membrane lipids have been considered the major driving force in curvature generation. However, the SH3 domain of endophilin also interacts with the proline-rich third intracellular loop (TIL) of various G-protein-coupled receptors (GPCRs), and it is unclear whether this interaction has a direct role in generating membrane curvature during endocytosis. To examine this, we designed model membranes with a membrane density of 1400 receptors per μm2 represented by a covalently conjugated TIL region from the β1-adrenergic receptor. We observed that TIL recruits endophilin to membranes composed of 95 mol% of zwitterionic lipids via the SH3 domain. More importantly, endophilin recruited via TIL tubulates vesicles and gets sorted onto highly curved membrane tubules. These observations indicate that the cellular membrane bending and curvature sensing activities of endophilin can be facilitated through detection of the TIL of activated GPCRs in addition to binding to anionic lipids. Furthermore, we show that TIL electrostatically interacts with membranes composed of anionic lipids. Therefore, anionic lipids can modulate TIL/SH3 domain binding. Overall, our findings imply that an interplay between TIL, charged membrane lipids, BAR domain, and SH3 domain could exist in the biological system and that these components may act in coordination to regulate the internalization of cellular receptors.
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Affiliation(s)
- Samsuzzoha Mondal
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Karthik B Narayan
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Imania Powers
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Samuel Botterbusch
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Tobias Baumgart
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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15
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Möller IR, Merkle PS, Calugareanu D, Comamala G, Schmidt SG, Loland CJ, Rand KD. Probing the conformational impact of detergents on the integral membrane protein LeuT by global HDX-MS. J Proteomics 2020; 225:103845. [PMID: 32480080 DOI: 10.1016/j.jprot.2020.103845] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 05/17/2020] [Accepted: 05/24/2020] [Indexed: 01/11/2023]
Abstract
Neurotransmitter:sodium symporters (NSS) are integral membrane proteins (IMP), responsible for reuptake of neurotransmitters from the synaptic cleft. Due to challenges in production of mammalian NSS in their active form, the prokaryotic hydrophobic amino acid transporter, LeuT, served here as a steadfast model for elucidation of structure-function relationship. As NSS proteins reside within phospholipid bilayer, they require stabilization by artificial membrane systems upon their extraction. Right choice of artificial membrane system is crucial as suboptimal detergent and/or lipids can lead to destabilization or non-native stabilization. Here we study the effect of related detergents, dodecyl maltoside (DDM) and lauryl maltose neopentyl glycol (LMNG), on the conformational dynamics of LeuT by global HDX-MS, in the presence of functionally relevant ligands. We observed that LeuT is more dynamic when solubilized in DDM compared to LMNG. Moreover, LeuT exhibited increased HDX in the presence of K+ compared to Na+, indicating a more dynamic conformation in the presence of K+. Upon addition of leucine, LeuT underwent additional stabilization relative to the Na+-bound state. Finally, peak broadening was observed, suggesting that LeuT undergoes slow unfolding/refolding dynamics in detergent solution. These slow dynamics were verified by local HDX, also proving that detergents modulate the rate of these dynamics. SIGNIFICANCE: Overall, we show the efficacy of global HDX-MS to evaluate the effect of artificial membrane systems on integral membrane proteins and the importance of carefully selecting compatible detergent (and/or lipid) for the solubilization of this class of proteins.
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Affiliation(s)
- Ingvar R Möller
- Protein Analysis Group, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen O, Denmark
| | - Patrick S Merkle
- Protein Analysis Group, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen O, Denmark
| | - Dionisie Calugareanu
- Protein Analysis Group, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen O, Denmark
| | - Gerard Comamala
- Protein Analysis Group, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen O, Denmark
| | - Solveig Gaarde Schmidt
- Laboratory for Membrane Protein Dynamics, Department of Neuroscience, University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Claus J Loland
- Laboratory for Membrane Protein Dynamics, Department of Neuroscience, University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Kasper D Rand
- Protein Analysis Group, Department of Pharmacy, University of Copenhagen, 2100 Copenhagen O, Denmark.
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16
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Lecas L, Hartmann L, Caro L, Mohamed-Bouteben S, Raingeval C, Krimm I, Wagner R, Dugas V, Demesmay C. Miniaturized weak affinity chromatography for ligand identification of nanodiscs-embedded G-protein coupled receptors. Anal Chim Acta 2020; 1113:26-35. [DOI: 10.1016/j.aca.2020.03.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 12/14/2022]
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17
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Abstract
The interactions between lipids and proteins are one of the most fundamental processes in living organisms, responsible for critical cellular events ranging from replication, cell division, signaling, and movement. Enabling the central coupling responsible for maintaining the functionality of the breadth of proteins, receptors, and enzymes that find their natural home in biological membranes, the fundamental mechanisms of recognition of protein for lipid, and vice versa, have been a focal point of biochemical and biophysical investigations for many decades. Complexes of lipids and proteins, such as the various lipoprotein factions, play central roles in the trafficking of important proteins, small molecules and metabolites and are often implicated in disease states. Recently an engineered lipoprotein particle, termed the nanodisc, a modified form of the human high density lipoprotein fraction, has served as a membrane mimetic for the investigation of membrane proteins and studies of lipid-protein interactions. In this review, we summarize the current knowledge regarding this self-assembling lipid-protein complex and provide examples for its utility in the investigation of a large number of biological systems.
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18
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Lee SH, Lee M, Yang H, Cho Y, Hong S, Park TH. Bioelectronic sensor mimicking the human neuroendocrine system for the detection of hypothalamic-pituitary-adrenal axis hormones in human blood. Biosens Bioelectron 2020; 154:112071. [PMID: 32056965 DOI: 10.1016/j.bios.2020.112071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/27/2020] [Accepted: 02/01/2020] [Indexed: 12/15/2022]
Abstract
In the neuroendocrine system, corticotropin-releasing hormone (CRH) and adrenocorticotropic hormone (ACTH) play important roles in the regulation of the hypothalamic-pituitary-adrenal (HPA) system. Disorders of the HPA system lead to physiological problems, such as Addison's disease and Cushing's syndrome. Therefore, detection of CRH and ACTH is essential for diagnosing disorders related to the HPA system. Herein, receptors of the HPA axis were used to construct a bioelectronic sensor system for the detection of CRH and ACTH. The CRH receptor, corticotropin-releasing hormone receptor 1 (CRHR1), and the ACTH receptor, melanocortin 2 receptor (MC2R), were produced using an Escherichia coli expression system, and were reconstituted using nanodisc (ND) technology. The receptor-embedded NDs were immobilized on a floating electrode of a carbon nanotube field-effect transistor (CNT-FET). The constructed sensors sensitively detected CRH and ACTH to a concentration of 1 fM with high selectivity in real time. Furthermore, the reliable detection of CRH and ACTH in human plasma by the developed sensors demonstrated their potential in clinical and practical applications. These results indicate that CRHR1 and MC2R-based bioelectronic sensors can be applied for rapid and efficient detection of CRH and ACTH.
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Affiliation(s)
- Seung Hwan Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea; Department of Bionano Engineering and Bionanotechnology, Hanyang University, Ansan, 15588, Republic of Korea
| | - Minju Lee
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Heehong Yang
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea; Protein Engineering Laboratory, Discovery Unit, MOGAM Institute for Biomedical Research, Yongin, 16924, Republic of Korea
| | - Youngtak Cho
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seunghun Hong
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Tai Hyun Park
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea.
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19
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A Combined Cell-Free Protein Synthesis and Fluorescence-Based Approach to Investigate GPCR Binding Properties. Methods Mol Biol 2019; 1947:57-77. [PMID: 30969411 DOI: 10.1007/978-1-4939-9121-1_4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Fluorescent labeling of de novo synthesized proteins is in particular a valuable tool for functional and structural studies of membrane proteins. In this context, we present two methods for the site-specific fluorescent labeling of difficult-to-express membrane proteins in combination with cell-free protein synthesis. The cell-free protein synthesis system is based on Chinese Hamster Ovary Cells (CHO) since this system contains endogenous membrane structures derived from the endoplasmic reticulum. These so-called microsomes enable a direct integration of membrane proteins into a biological membrane. In this protocol the first part describes the fluorescent labeling by using a precharged tRNA, loaded with a fluorescent amino acid. The second part describes the preparation of a modified aminoacyl-tRNA-synthetase and a suppressor tRNA that are applied to the CHO cell-free system to enable the incorporation of a non-canonical amino acid. The reactive group of the non-canonical amino acid is further coupled to a fluorescent dye. Both methods utilize the amber stop codon suppression technology. The successful fluorescent labeling of the model G protein-coupled receptor adenosine A2A (Adora2a) is analyzed by in-gel-fluorescence, a reporter protein assay, and confocal laser scanning microscopy (CLSM). Moreover, a ligand-dependent conformational change of the fluorescently labeled Adora2a was analyzed by bioluminescence resonance energy transfer (BRET).
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20
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A Critical Analysis of Molecular Mechanisms Underlying Membrane Cholesterol Sensitivity of GPCRs. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1115:21-52. [PMID: 30649754 DOI: 10.1007/978-3-030-04278-3_2] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
G protein-coupled receptors (GPCRs) are the largest and a diverse family of proteins involved in signal transduction across biological membranes. GPCRs mediate a wide range of physiological processes and have emerged as major targets for the development of novel drug candidates in all clinical areas. Since GPCRs are integral membrane proteins, regulation of their organization, dynamics, and function by membrane lipids, in particular membrane cholesterol, has emerged as an exciting area of research. Cholesterol sensitivity of GPCRs could be due to direct interaction of cholesterol with the receptor (specific effect). Alternately, GPCR function could be influenced by the effect of cholesterol on membrane physical properties (general effect). In this review, we critically analyze the specific and general mechanisms of the modulation of GPCR function by membrane cholesterol, taking examples from representative GPCRs. While evidence for both the proposed mechanisms exists, there appears to be no clear-cut distinction between these two mechanisms, and a combination of these mechanisms cannot be ruled out in many cases. We conclude that classifying the mechanism underlying cholesterol sensitivity of GPCR function merely into these two mutually exclusive classes could be somewhat arbitrary. A more holistic approach could be suitable for analyzing GPCR-cholesterol interaction.
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21
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Kwon OS, Song HS, Park TH, Jang J. Conducting Nanomaterial Sensor Using Natural Receptors. Chem Rev 2018; 119:36-93. [DOI: 10.1021/acs.chemrev.8b00159] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oh Seok Kwon
- Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
- Nanobiotechnology and Bioinformatics (Major), University of Science & Technology (UST), Daejon 34141, Republic of Korea
| | - Hyun Seok Song
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Division of Bioconvergence Analysis, Korea Basic Science Institute (KBSI), Cheongju 28119, Republic of Korea
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Tai Hyun Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Jyongsik Jang
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
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22
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Role of Extracellular Loops and Membrane Lipids for Ligand Recognition in the Neuronal Adenosine Receptor Type 2A: An Enhanced Sampling Simulation Study. Molecules 2018; 23:molecules23102616. [PMID: 30322034 PMCID: PMC6222423 DOI: 10.3390/molecules23102616] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/09/2018] [Accepted: 10/10/2018] [Indexed: 01/12/2023] Open
Abstract
Human G-protein coupled receptors (GPCRs) are important targets for pharmaceutical intervention against neurological diseases. Here, we use molecular simulation to investigate the key step in ligand recognition governed by the extracellular domains in the neuronal adenosine receptor type 2A (hA2AR), a target for neuroprotective compounds. The ligand is the high-affinity antagonist (4-(2-(7-amino-2-(furan-2-yl)-[1,2,4]triazolo[1,5-a][1,3,5]triazin-5-ylamino)ethyl)phenol), embedded in a neuronal membrane mimic environment. Free energy calculations, based on well-tempered metadynamics, reproduce the experimentally measured binding affinity. The results are consistent with the available mutagenesis studies. The calculations identify a vestibular binding site, where lipids molecules can actively participate to stabilize ligand binding. Bioinformatic analyses suggest that such vestibular binding site and, in particular, the second extracellular loop, might drive the ligand toward the orthosteric binding pocket, possibly by allosteric modulation. Taken together, these findings point to a fundamental role of the interaction between extracellular loops and membrane lipids for ligands’ molecular recognition and ligand design in hA2AR.
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23
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Lee M, Yang H, Kim D, Yang M, Park TH, Hong S. Human-like smelling of a rose scent using an olfactory receptor nanodisc-based bioelectronic nose. Sci Rep 2018; 8:13945. [PMID: 30224633 PMCID: PMC6141559 DOI: 10.1038/s41598-018-32155-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 09/03/2018] [Indexed: 01/10/2023] Open
Abstract
We report a strategy for the human-like smelling of a rose scent utilizing olfactory receptor nanodisc (ND)-based bioelectronic nose devices. In this strategy, a floating electrode (FE)-based carbon nanotube (CNT) field effect transistor (FET) was functionalized with human olfactory receptor 1A2 (hOR1A2)-embedded NDs (hOR1A2NDs). The hOR1A2NDs responded to rose scent molecules specifically, which were monitored electrically using the underlying CNT-FET. This strategy allowed us to quantitatively assess the contents of geraniol and citronellol, the main components of a rose scent, as low as 1 fM and 10 fM, respectively. In addition, it enabled us to selectively discriminate a specific rose odorant from other odorants. Significantly, we also demonstrated that the responses of hOR1A2NDs to a rose scent could be strongly enhanced by enhancer materials like a human nose. Furthermore, the method provided a means to quantitatively evaluate rose scent components in real samples such as rose oil. Since our method allows one to quantitatively evaluate general rose scent ingredients just like a human nose, it could be a powerful strategy for versatile basic research and various applications such as fragrance development.
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Affiliation(s)
- Minju Lee
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, 08826, Korea
| | - Heehong Yang
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Korea
- Protein Engineering Laboratory, Recombinants Unit, MOGAM Institute for Biomedical Research, Yongin, 16924, Korea
| | - Daesan Kim
- Department of Biophysics and Chemical Biology, Seoul National University, Seoul, 08826, Korea
| | - Myungjae Yang
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, 08826, Korea
| | - Tai Hyun Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Korea.
| | - Seunghun Hong
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, 08826, Korea.
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24
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On-chip membrane protein cell-free expression enables development of a direct binding assay: A curious case of potassium channel KcsA-Kv1.3. Anal Biochem 2018; 556:70-77. [DOI: 10.1016/j.ab.2018.06.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/19/2018] [Accepted: 06/19/2018] [Indexed: 01/30/2023]
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25
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Hillmann R, Viefhues M, Goett-Zink L, Gilzer D, Hellweg T, Gölzhäuser A, Kottke T, Anselmetti D. Characterization of Robust and Free-Standing 2D-Nanomembranes of UV-Polymerized Diacetylene Lipids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3256-3263. [PMID: 29485886 DOI: 10.1021/acs.langmuir.7b03403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Free-standing lipid membranes are promising as artificial functional membrane systems for application in separation, filtration, and nanopore sensing. To improve the mechanical properties of lipid membranes, UV-polymerized lipids have been introduced. We investigated free-standing as well as substrate-supported monolayers of 1-palmitoyl-2-(10,12-tricosadiynoyl)- sn-glycero-3-phosphoethanolamine (PTPE) and 1,2-bis(10,12-tricosadiynoyl)- sn-glycero-3-phosphocholine (DiynePC) and characterized them with respect to their structure, morphology, and stability. Using helium ion microscopy (HIM), we were able to visualize the integrity of the lipid 2D-nanomembranes spanning micrometer-sized voids under high-vacuum conditions. Atomic force microscopy (AFM) investigations under ambient conditions revealed formation of intact and robust pore-spanning 2D-nanomembranes up to 8 × 2 μm2 in size. Analysis by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) verified a distinct reduction of signal at 2143 cm-1 from diacetylene groups in the 2D-nanomembranes after UV-polymerization. Further high-resolution AFM investigations of unpolymerized lipid monolayers revealed a well-ordered two-dimensional network, when deposited on highly oriented pyrolytic graphite (HOPG). These structures were inhibited for polymerized adlayers. Structural models for the molecular arrangement of the adlayers are proposed and discussed.
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26
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Yang Y, Hong Y, Cho E, Kim GB, Kim IS. Extracellular vesicles as a platform for membrane-associated therapeutic protein delivery. J Extracell Vesicles 2018; 7:1440131. [PMID: 29535849 PMCID: PMC5844050 DOI: 10.1080/20013078.2018.1440131] [Citation(s) in RCA: 143] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 02/07/2018] [Indexed: 02/08/2023] Open
Abstract
Membrane proteins are of great research interest, particularly because they are rich in targets for therapeutic application. The suitability of various membrane proteins as targets for therapeutic formulations, such as drugs or antibodies, has been studied in preclinical and clinical studies. For therapeutic application, however, a protein must be expressed and purified in as close to its native conformation as possible. This has proven difficult for membrane proteins, as their native conformation requires the association with an appropriate cellular membrane. One solution to this problem is to use extracellular vesicles as a display platform. Exosomes and microvesicles are membranous extracellular vesicles that are released from most cells. Their membranes may provide a favourable microenvironment for membrane proteins to take on their proper conformation, activity, and membrane distribution; moreover, membrane proteins can cluster into microdomains on the surface of extracellular vesicles following their biogenesis. In this review, we survey the state-of-the-art of extracellular vesicle (exosome and small-sized microvesicle)-based therapeutics, evaluate the current biological understanding of these formulations, and forecast the technical advances that will be needed to continue driving the development of membrane protein therapeutics.
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Affiliation(s)
- Yoosoo Yang
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- Division for Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul, Republic of Korea
| | - Yeonsun Hong
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea
| | - Eunji Cho
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea
| | - Gi Beom Kim
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea
| | - In-San Kim
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea
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27
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Yang H, Lee M, Kim D, Hong S, Park TH. Bioelectronic Nose Using Olfactory Receptor-Embedded Nanodiscs. Methods Mol Biol 2018; 1820:239-249. [PMID: 29884950 DOI: 10.1007/978-1-4939-8609-5_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Olfactory receptors (ORs) are the largest family of the G protein-coupled receptors (GPCRs), which are significantly involved in many human diseases and 40% of all drug targets. A platform containing stable and high-quality OR would be a powerful tool for the development of a practical biosensor that can be applied to various applications, such as the early diagnosis of diseases, assessment of food quality, and drug and fragrance development. Significant efforts have been made to develop the biosensor using GPCRs; nevertheless, they remain a challenge. This chapter describes an attractive methodology for the development of a stable bioelectronic nose using OR-embedded nanodiscs. The ORs were produced in Escherichia coli (E. coli), purified with column chromatography, reconstituted into nanodiscs and applied to a carbon nanotube-field effect transistor (CNT-FET) with floating electrodes. The nanodisc-based bioelectronic nose exhibits high-performance in terms of sensitivity, selectivity and stability. This strategy can be used as a practical method for the receptor-based sensing approach, which represents significant progress in nano-bio technology toward a practical biosensor.
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Affiliation(s)
- Heehong Yang
- School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea
| | - Minju Lee
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, South Korea
| | - Daesan Kim
- Department of Biophysics and Chemical Biology, Seoul National University, Seoul, South Korea
| | - Seunghun Hong
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul, South Korea
| | - Tai Hyun Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea.
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28
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Yang H, Kim D, Kim J, Moon D, Song HS, Lee M, Hong S, Park TH. Nanodisc-Based Bioelectronic Nose Using Olfactory Receptor Produced in Escherichia coli for the Assessment of the Death-Associated Odor Cadaverine. ACS NANO 2017; 11:11847-11855. [PMID: 29121467 DOI: 10.1021/acsnano.7b04992] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Cadaverine (CV), a death-associated odor, is an important target molecule for various sensor applications, including the evaluation of food spoilage. In this study, we developed an oriented nanodisc (ND)-functionalized bioelectronic nose (ONBN), based on carbon nanotube transistors and nanodiscs embedded with an olfactory receptor produced in Escherichia coli (E. coli) for detection of CV. To fabricate ONBN devices, a trace-amine-associated receptor 13c (TAAR13c) binding to CV was produced in E. coli, purified, reconstituted into NDs, and assembled, in the desired orientation, onto a carbon- nanotube-based field-effect transistor with floating electrodes. The ONBN showed high performance in terms of sensitivity and selectivity. Moreover, the ONBN was used to measure CV in diverse real-food samples for the determination of food freshness. These results indicate ONBN devices can be utilized to evaluate the quality of food samples quantitatively, which should enable versatile practical applications such as food safety and preservative development. Moreover, the ONBN could provide a useful tool for detection of corpses, which could be practically used in disaster responses.
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Affiliation(s)
- Heehong Yang
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Daesan Kim
- Department of Biophysics and Chemical Biology, Seoul National University , Seoul 08826, Republic of Korea
| | - Jeongsu Kim
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University , Seoul 08826, Republic of Korea
| | - Dongseok Moon
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Hyun Seok Song
- Division of Bioconvergence Analysis, Korea Basic Science Institute (KBSI) , Daejeon 34133, Republic of Korea
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology , Daejeon 34114, Republic of Korea
| | - Minju Lee
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University , Seoul 08826, Republic of Korea
| | - Seunghun Hong
- Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University , Seoul 08826, Republic of Korea
| | - Tai Hyun Park
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
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Szundi I, Funatogawa C, Guo Y, Yan ECY, Kliger DS. Protein Sequence and Membrane Lipid Roles in the Activation Kinetics of Bovine and Human Rhodopsins. Biophys J 2017; 113:1934-1944. [PMID: 29117518 DOI: 10.1016/j.bpj.2017.08.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/26/2017] [Accepted: 08/28/2017] [Indexed: 12/17/2022] Open
Abstract
Rhodopsin is a G protein-coupled receptor found in the rod outer segments in the retina, which triggers a visual response under dim light conditions. Recently, a study of the late, microsecond-to-millisecond kinetics of photointermediates of the human and bovine rhodopsins in their native membranes revealed a complex, double-square mechanism of rhodopsin activation. In this kinetic scheme, the human rhodopsin exhibited more Schiff base deprotonation than bovine rhodopsin, which could arise from the ∼7% sequence difference between the two proteins, or from the difference between their membrane lipid environments. To differentiate between the effects of membrane and protein structure on the kinetics, the human and bovine rhodopsins were inserted into 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine lipid nanodiscs and the kinetics of activation at 15°C and pH 8.7 was investigated by time-resolved absorption spectroscopy and global kinetic analysis. For both proteins, the kinetics in nanodiscs shows the characteristics observed in the native membranes, and is described by a multisquare model with Schiff base deprotonation at the lumirhodopsin I intermediate stage. The results indicate that the protein sequence controls the extent of Schiff base deprotonation and accumulation of intermediates, and thus plays the main role in the different activation kinetics observed between human and bovine rhodopsins. The membrane lipid does have a minor role by modulating the timing of the kinetics, with the nanodisc environment leading to an earlier Schiff base deprotonation.
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Affiliation(s)
- Istvan Szundi
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California
| | - Chie Funatogawa
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California
| | - Ying Guo
- Department of Chemistry, Yale University, New Haven, Connecticut
| | - Elsa C Y Yan
- Department of Chemistry, Yale University, New Haven, Connecticut
| | - David S Kliger
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California.
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Smrt ST, Draney AW, Singaram I, Lorieau JL. Structure and Dynamics of Membrane Proteins and Membrane Associated Proteins with Native Bicelles from Eukaryotic Tissues. Biochemistry 2017; 56:5318-5327. [PMID: 28915027 DOI: 10.1021/acs.biochem.7b00575] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Sean T. Smrt
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Adrian W. Draney
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Indira Singaram
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Justin L. Lorieau
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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31
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Park SJ, Yang H, Lee SH, Song HS, Park CS, Bae J, Kwon OS, Park TH, Jang J. Dopamine Receptor D1 Agonism and Antagonism Using a Field-Effect Transistor Assay. ACS NANO 2017; 11:5950-5959. [PMID: 28558184 DOI: 10.1021/acsnano.7b01722] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The field-effect transistor (FET) has been used in the development of diagnostic tools for several decades, leading to high-performance biosensors. Therefore, the FET platform can provide the foundation for the next generation of analytical methods. A major role of G-protein-coupled receptors (GPCRs) is in the transfer of external signals into the cell and promoting human body functions; thus, their principle application is in the screening of new drugs. The research community uses efficient systems to screen potential GPCR drugs; nevertheless, the need to develop GPCR-conjugated analytical devices remains for next-generation new drug screening. In this study, we proposed an approach for studying receptor agonism and antagonism by combining the roles of FETs and GPCRs in a dopamine receptor D1 (DRD1)-conjugated FET system, which is a suitable substitute for conventional cell-based receptor assays. DRD1 was reconstituted and purified to mimic native binding pockets that have highly discriminative interactions with DRD1 agonists/antagonists. The real-time responses from the DRD1-nanohybrid FET were highly sensitive and selective for dopamine agonists/antagonists, and their maximal response levels were clearly different depending on their DRD1 affinities. Moreover, the equilibrium constants (K) were estimated by fitting the response levels. Each K value indicates the variation in the affinity between DRD1 and the agonists/antagonists; a greater K value corresponds to a stronger DRD1 affinity in agonism, whereas a lower K value in antagonism indicates a stronger dopamine-blocking effect.
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Affiliation(s)
- Seon Joo Park
- Harzards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB) , Daejeon 34141, Republic of Korea
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Heehong Yang
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Seung Hwan Lee
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Hyun Seok Song
- Division of Bioconvergence Analysis, Korea Basic Science Institute (KBSI) , Daejeon 34133, Republic of Korea
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology , Daejeon 34114, Republic of Korea
| | - Chul Soon Park
- Harzards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB) , Daejeon 34141, Republic of Korea
| | - Joonwon Bae
- Department of Applied Chemistry, Dongduk Women's University , Seoul 02748, Republic of Korea
| | - Oh Seok Kwon
- Harzards Monitoring Bionano Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB) , Daejeon 34141, Republic of Korea
| | - Tai Hyun Park
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
| | - Jyongsik Jang
- School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea
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32
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Cai Y, Liu Y, Culhane KJ, DeVree BT, Yang Y, Sunahara RK, Yan ECY. Purification of family B G protein-coupled receptors using nanodiscs: Application to human glucagon-like peptide-1 receptor. PLoS One 2017; 12:e0179568. [PMID: 28609478 PMCID: PMC5469476 DOI: 10.1371/journal.pone.0179568] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/31/2017] [Indexed: 12/16/2022] Open
Abstract
Family B G protein-coupled receptors (GPCRs) play vital roles in hormone-regulated homeostasis. They are drug targets for metabolic diseases, including type 2 diabetes and osteoporosis. Despite their importance, the signaling mechanisms for family B GPCRs at the molecular level remain largely unexplored due to the challenges in purification of functional receptors in sufficient amount for biophysical characterization. Here, we purified the family B GPCR human glucagon-like peptide-1 (GLP-1) receptor (GLP1R), whose agonists, e.g. exendin-4, are used for the treatment of type 2 diabetes mellitus. The receptor was expressed in HEK293S GnTl- cells using our recently developed protocol. The protocol incorporates the receptor into the native-like lipid environment of reconstituted high density lipoprotein (rHDL) particles, also known as nanodiscs, immediately after the membrane solubilization step followed by chromatographic purification, minimizing detergent contact with the target receptor to reduce denaturation and prolonging stabilization of receptor in lipid bilayers without extra steps of reconstitution. This method yielded purified GLP1R in nanodiscs that could bind to GLP-1 and exendin-4 and activate Gs protein. This nanodisc purification method can potentially be a general strategy to routinely obtain purified family B GPCRs in the 10s of microgram amounts useful for spectroscopic analysis of receptor functions and activation mechanisms.
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Affiliation(s)
- Yingying Cai
- Department of Chemistry, Yale University, New Haven, Connecticut, United States of America
| | - Yuting Liu
- Department of Chemistry, Yale University, New Haven, Connecticut, United States of America
| | - Kelly J. Culhane
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, United States of America
| | - Brian T. DeVree
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Yang Yang
- Nanobiology Institute, Yale University, New Haven, Connecticut, United States of America
- Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Roger K. Sunahara
- Department of Pharmacology, University of California at San Diego, La Jolla, California, United States of America
| | - Elsa C. Y. Yan
- Department of Chemistry, Yale University, New Haven, Connecticut, United States of America
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Dong X, Herrera-Hernández MG, Ramon E, Garriga P. Docosahexaenoic acid phospholipid differentially modulates the conformation of G90V and N55K rhodopsin mutants associated with retinitis pigmentosa. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:975-981. [PMID: 28212859 DOI: 10.1016/j.bbamem.2017.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 02/09/2017] [Accepted: 02/11/2017] [Indexed: 11/26/2022]
Abstract
Rhodopsin is the visual photoreceptor of the retinal rod cells that mediates dim light vision and a prototypical member of the G protein-coupled receptor superfamily. The structural stability and functional performance of rhodopsin are modulated by membrane lipids. Docosahexaenoic acid has been shown to interact with native rhodopsin but no direct evidence has been established on the effect of such lipid on the stability and regeneration of rhodopsin mutants associated with retinal diseases. The stability and regeneration of two thermosensitive mutants G90V and N55K, associated with the retinal degenerative disease retinitis pigmentosa, have been analyzed in docosohexaenoic phospholipid (1,2-didocosa-hexaenoyl-sn-glycero-3-phosphocholine; DDHA-PC) liposomes. G90V mutant reconstituted in DDHA-PC liposomes significantly increased its thermal stability, but N55K mutant showed similar thermal sensitivity both in dodecyl maltoside detergent solution and in DDHA-PC liposomes. The retinal release process, measured by fluorescence spectroscopy, became faster in the lipid system for the two mutants. The opsin conformation was stabilized for the G90V mutant allowing improved retinal uptake whereas no chromophore binding could be detected for N55K opsin after photoactivation. The results emphasize the distinct role of DHA on different phenotypic rhodopsin mutations associated with classical (G90V) and sector (N55K) retinitis pigmentosa.
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Affiliation(s)
- Xiaoyun Dong
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain
| | - María Guadalupe Herrera-Hernández
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain
| | - Eva Ramon
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain
| | - Pere Garriga
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain.
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Shu J, Zhang F, Zhang L, Wei W. G protein coupled receptors signaling pathways implicate in inflammatory and immune response of rheumatoid arthritis. Inflamm Res 2016; 66:379-387. [DOI: 10.1007/s00011-016-1011-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 10/12/2016] [Accepted: 11/15/2016] [Indexed: 02/07/2023] Open
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Calmet P, De Maria M, Harté E, Lamb D, Serrano-Vega M, Jazayeri A, Tschammer N, Alves ID. Real time monitoring of membrane GPCR reconstitution by plasmon waveguide resonance: on the role of lipids. Sci Rep 2016; 6:36181. [PMID: 27824122 PMCID: PMC5099921 DOI: 10.1038/srep36181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 10/12/2016] [Indexed: 01/14/2023] Open
Abstract
G-protein coupled receptors (GPCRs) are important therapeutic targets since more than 40% of the drugs on the market exert their action through these proteins. To decipher the molecular mechanisms of activation and signaling, GPCRs often need to be isolated and reconstituted from a detergent-solubilized state into a well-defined and controllable lipid model system. Several methods exist to reconstitute membrane proteins in lipid systems but usually the reconstitution success is tested at the end of the experiment and often by an additional and indirect method. Irrespective of the method used, the reconstitution process is often an intractable and time-consuming trial-and-error procedure. Herein, we present a method that allows directly monitoring the reconstitution of GPCRs in model planar lipid membranes. Plasmon waveguide resonance (PWR) allows following GPCR lipid reconstitution process without any labeling and with high sensitivity. Additionally, the method is ideal to probe the lipid effect on receptor ligand binding as demonstrated by antagonist binding to the chemokine CCR5 receptor.
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Affiliation(s)
- Pierre Calmet
- Max Planck Institute for the Science of Light, Erlangen, Germany.,Friedrich Alexander University (FAU) Erlangen-Nürnberg, Erlangen, Germany.,Chemistry and Biology of Membranes and Nanoobjects, UMR 5248 CNRS, University of Bordeaux, Bat. B14 allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - Monica De Maria
- Department of Developmental Biology, Friedrich Alexander University of Erlangen-Nürnberg, Erlangen, Germany
| | - Etienne Harté
- Chemistry and Biology of Membranes and Nanoobjects, UMR 5248 CNRS, University of Bordeaux, Bat. B14 allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - Daniel Lamb
- Heptares Therapeutics Ltd, BioPark, Broadwater Road, Welwyn Garden City, Hertfordshire AL7 3AX, UK
| | - Maria Serrano-Vega
- Heptares Therapeutics Ltd, BioPark, Broadwater Road, Welwyn Garden City, Hertfordshire AL7 3AX, UK
| | - Ali Jazayeri
- Heptares Therapeutics Ltd, BioPark, Broadwater Road, Welwyn Garden City, Hertfordshire AL7 3AX, UK
| | - Nuska Tschammer
- Department of Developmental Biology, Friedrich Alexander University of Erlangen-Nürnberg, Erlangen, Germany.,NanoTemper Technologies GmbH, Munich, Germany
| | - Isabel D Alves
- Chemistry and Biology of Membranes and Nanoobjects, UMR 5248 CNRS, University of Bordeaux, Bat. B14 allée Geoffroy St. Hilaire, 33600 Pessac, France
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Abstract
Anti-microbial peptides (AMPs) were originally thought to exert protecting actions against bacterial infection by disintegrating bacterial membranes. Upon identification of internal bacterial targets, the view changed and moved toward inhibition of prokaryote-specific biochemical processes. However, the level of none of these activities can explain the robust efficacy of some of these peptides in animal models of systemic and cutaneous infections. A rapidly growing panel of reports suggests that AMPs, now called host-defense peptides (HDPs), act through activating the immune system of the host. This includes recruitment and activation of macrophages and mast cells, inducing chemokine production and altering NF-κB signaling processes. As a result, both pro- and anti-inflammatory responses are elevated together with activation of innate and adaptive immunity mechanisms, wound healing, and apoptosis. HDPs sterilize the systemic circulation and local injury sites significantly more efficiently than pure single-endpoint in vitro microbiological or biochemical data would suggest and actively aid recovering from tissue damage after or even without bacterial infections. However, the multiple and, often opposing, immunomodulatory functions of HDPs require exceptional care in therapeutic considerations.
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Affiliation(s)
- Laszlo Otvos
- 1 Olpe LLC, Audubon, PA, USA
- 2 Institute of Medical Microbiology , Semmelweis University , Budapest, Hungary
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37
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Bolivar JH, Muñoz-García JC, Castro-Dopico T, Dijkman PM, Stansfeld PJ, Watts A. Interaction of lipids with the neurotensin receptor 1. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:1278-87. [DOI: 10.1016/j.bbamem.2016.02.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 02/02/2016] [Accepted: 02/24/2016] [Indexed: 10/22/2022]
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Smolentsev N, Lütgebaucks C, Okur HI, de Beer AGF, Roke S. Intermolecular Headgroup Interaction and Hydration as Driving Forces for Lipid Transmembrane Asymmetry. J Am Chem Soc 2016; 138:4053-60. [DOI: 10.1021/jacs.5b11776] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Nikolay Smolentsev
- Laboratory for Fundamental
BioPhotonics (LBP), Institute of Bioengineering (IBI), and Institute
of Materials Science (IMX), School of Engineering (STI), and Lausanne
Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Cornelis Lütgebaucks
- Laboratory for Fundamental
BioPhotonics (LBP), Institute of Bioengineering (IBI), and Institute
of Materials Science (IMX), School of Engineering (STI), and Lausanne
Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Halil I. Okur
- Laboratory for Fundamental
BioPhotonics (LBP), Institute of Bioengineering (IBI), and Institute
of Materials Science (IMX), School of Engineering (STI), and Lausanne
Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Alex G. F. de Beer
- Laboratory for Fundamental
BioPhotonics (LBP), Institute of Bioengineering (IBI), and Institute
of Materials Science (IMX), School of Engineering (STI), and Lausanne
Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Sylvie Roke
- Laboratory for Fundamental
BioPhotonics (LBP), Institute of Bioengineering (IBI), and Institute
of Materials Science (IMX), School of Engineering (STI), and Lausanne
Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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Vestergaard M, Kraft JF, Vosegaard T, Thøgersen L, Schiøtt B. Bicelles and Other Membrane Mimics: Comparison of Structure, Properties, and Dynamics from MD Simulations. J Phys Chem B 2015; 119:15831-43. [PMID: 26610232 DOI: 10.1021/acs.jpcb.5b08463] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The increased interest in studying membrane proteins has led to the development of new membrane mimics such as bicelles and nanodiscs. However, only limited knowledge is available of how these membrane mimics are affected by embedded proteins and how well they mimic a lipid bilayer. Herein, we present molecular dynamics simulations to elucidate structural and dynamic properties of small bicelles and compare them to a large alignable bicelle, a small nanodisc, and a lipid bilayer. Properties such as lipid packing and properties related to embedding both an α-helical peptide and a transmembrane protein are investigated. The small bicelles are found to be very dynamic and mainly assume a prolate shape substantiating that small bicelles cannot be regarded as well-defined disclike structures. However, addition of a peptide results in an increased tendency to form disc-shaped bicelles. The small bicelles and the nanodiscs show increased peptide solvation and difference in peptide orientation compared to embedding in a bilayer. The large bicelle imitated a bilayer well with respect to both curvature and peptide solvation, although peripheral binding of short tailed lipids to the embedded proteins is observed, which could hinder ligand binding or multimer formation.
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Affiliation(s)
- Mikkel Vestergaard
- Center for Insoluble Protein Structures (inSPIN), Interdisciplinary Nanoscience Center (iNANO), and Department of Chemistry, Aarhus University , Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Johan F Kraft
- Center for Insoluble Protein Structures (inSPIN), Interdisciplinary Nanoscience Center (iNANO), and Department of Chemistry, Aarhus University , Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Thomas Vosegaard
- Danish Center for Ultrahigh-Field NMR Spectroscopy and Center for Insoluble Protein Structures (inSPIN), Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University , Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
| | - Lea Thøgersen
- Center for Membrane Pumps in Cells and Disease (PUMPKIN), Bioinformatics Research Centre, Aarhus University , C.F. Møllers Alle 8, DK-8000 Aarhus C, Denmark
| | - Birgit Schiøtt
- Center for Insoluble Protein Structures (inSPIN), Interdisciplinary Nanoscience Center (iNANO), and Department of Chemistry, Aarhus University , Langelandsgade 140, DK-8000 Aarhus C, Denmark
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Culhane KJ, Liu Y, Cai Y, Yan ECY. Transmembrane signal transduction by peptide hormones via family B G protein-coupled receptors. Front Pharmacol 2015; 6:264. [PMID: 26594176 PMCID: PMC4633518 DOI: 10.3389/fphar.2015.00264] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 10/23/2015] [Indexed: 01/28/2023] Open
Abstract
Although family B G protein-coupled receptors (GPCRs) contain only 15 members, they play key roles in transmembrane signal transduction of hormones. Family B GPCRs are drug targets for developing therapeutics for diseases ranging from metabolic to neurological disorders. Despite their importance, the molecular mechanism of activation of family B GPCRs remains largely unexplored due to the challenges in expression and purification of functional receptors to the quantity for biophysical characterization. Currently, there is no crystal structure available of a full-length family B GPCR. However, structures of key domains, including the extracellular ligand binding regions and seven-helical transmembrane regions, have been solved by X-ray crystallography and NMR, providing insights into the mechanisms of ligand recognition and selectivity, and helical arrangements within the cell membrane. Moreover, biophysical and biochemical methods have been used to explore functions, key residues for signaling, and the kinetics and dynamics of signaling processes. This review summarizes the current knowledge of the signal transduction mechanism of family B GPCRs at the molecular level and comments on the challenges and outlook for mechanistic studies of family B GPCRs.
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Affiliation(s)
- Kelly J Culhane
- Department of Molecular Biophysics and Biochemistry, Yale University New Haven, CT, USA
| | - Yuting Liu
- Department of Chemistry, Yale University New Haven, CT, USA
| | - Yingying Cai
- Department of Chemistry, Yale University New Haven, CT, USA
| | - Elsa C Y Yan
- Department of Chemistry, Yale University New Haven, CT, USA
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41
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Schach DK, Rock W, Franz J, Bonn M, Parekh SH, Weidner T. Reversible Activation of a Cell-Penetrating Peptide in a Membrane Environment. J Am Chem Soc 2015; 137:12199-202. [DOI: 10.1021/jacs.5b06720] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Denise K. Schach
- Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz 55128, Germany
| | - William Rock
- Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz 55128, Germany
| | - Johannes Franz
- Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz 55128, Germany
| | - Mischa Bonn
- Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz 55128, Germany
| | - Sapun H. Parekh
- Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz 55128, Germany
| | - Tobias Weidner
- Department of Molecular Spectroscopy, Max Planck Institute for Polymer Research, Mainz 55128, Germany
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42
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Dong X, Ramon E, Herrera-Hernández MG, Garriga P. Phospholipid Bicelles Improve the Conformational Stability of Rhodopsin Mutants Associated with Retinitis Pigmentosa. Biochemistry 2015; 54:4795-804. [PMID: 26181234 DOI: 10.1021/acs.biochem.5b00435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Mutations in the visual photoreceptor rhodopsin are the cause of the retinal degenerative disease retinitis pigmentosa. Some naturally occurring mutations can lead to protein conformational instability. Two such mutations, N55K and G90V, in the first and second transmembrane helices of the receptor, have been associated with sector and classical retinitis pigmentosa, respectively, and showed enhanced thermal sensitivity. We have carefully analyzed the effect of phospholipid bicelles on the stability and ligand binding properties of these two mutants and compared it with those of the detergent-solubilized samples. We have used a phospholipid bilayer consisting of 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine (DMPC) and 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC). We find that DMPC/DHPC bicelles dramatically increase the thermal stability of the rhodopsin mutants G90V and N55K. The chromophore stability and regeneration of the mutants were also increased in bicelles when compared to their behavior in a dodecyl maltoside detergent solution. The retinal release process was slowed in bicelles, and chromophore entry, after illumination, was improved for the G90V mutant but not for N55K. Furthermore, fluorescence spectroscopy measurements showed that bicelles allowed more exogenous retinal binding to the photoactivated G90V mutant than in a detergent solution. In contrast, N55K could not reposition any chromophore either in the detergent or in bicelles. The results demonstrate that DMPC/DHPC bicelles can counteract the destabilizing effect of the disease-causing mutations and can modulate the structural changes in the ensuing receptor photoactivation in a distinct specific manner for different retinitis pigmentosa mutant phenotypes.
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Affiliation(s)
- Xiaoyun Dong
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain
| | - Eva Ramon
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain
| | - María Guadalupe Herrera-Hernández
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain
| | - Pere Garriga
- Grup de Biotecnologia Molecular i Industrial, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla de Sant Nebridi 22, 08222 Terrassa, Catalonia, Spain
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43
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Purification and functional reconstitution of human olfactory receptor expressed in Escherichia coli. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-014-0897-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Inagaki S, Ghirlando R, Vishnivetskiy SA, Homan KT, White JF, Tesmer JJG, Gurevich VV, Grisshammer R. G Protein-Coupled Receptor Kinase 2 (GRK2) and 5 (GRK5) Exhibit Selective Phosphorylation of the Neurotensin Receptor in Vitro. Biochemistry 2015; 54:4320-9. [PMID: 26120872 PMCID: PMC4512254 DOI: 10.1021/acs.biochem.5b00285] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
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G protein-coupled
receptor kinases (GRKs) play an important role
in the desensitization of G protein-mediated signaling of G protein-coupled
receptors (GPCRs). The level of interest in mapping their phosphorylation
sites has increased because recent studies suggest that the differential
pattern of receptor phosphorylation has distinct biological consequences. In vitro phosphorylation experiments using well-controlled
systems are useful for deciphering the complexity of these physiological
reactions and understanding the targeted event. Here, we report on
the phosphorylation of the class A GPCR neurotensin receptor 1 (NTSR1)
by GRKs under defined experimental conditions afforded by nanodisc
technology. Phosphorylation of NTSR1 by GRK2 was agonist-dependent,
whereas phosphorylation by GRK5 occurred in an activation-independent
manner. In addition, the negatively charged lipids in the immediate
vicinity of NTSR1 directly affect phosphorylation by GRKs. Identification
of phosphorylation sites in agonist-activated NTSR1 revealed that
GRK2 and GRK5 target different residues located on the intracellular
receptor elements. GRK2 phosphorylates only the C-terminal Ser residues,
whereas GRK5 phosphorylates Ser and Thr residues located in intracellular
loop 3 and the C-terminus. Interestingly, phosphorylation assays using
a series of NTSR1 mutants show that GRK2 does not require acidic residues
upstream of the phospho-acceptors for site-specific phosphorylation,
in contrast to the β2-adrenergic and μ-opioid
receptors. Differential phosphorylation of GPCRs by GRKs is thought
to encode a particular signaling outcome, and our in vitro study revealed NTSR1 differential phosphorylation by GRK2 and GRK5.
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Affiliation(s)
- Sayaka Inagaki
- †Membrane Protein Structure Function Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Department of Health and Human Services, Rockville, Maryland 20852, United States
| | - Rodolfo Ghirlando
- ‡Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland 20892, United States
| | - Sergey A Vishnivetskiy
- §Department of Pharmacology, Vanderbilt University, Nashville, Tennessee 37232, United States
| | - Kristoff T Homan
- ∥Departments of Pharmacology and Biological Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jim F White
- †Membrane Protein Structure Function Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Department of Health and Human Services, Rockville, Maryland 20852, United States
| | - John J G Tesmer
- ∥Departments of Pharmacology and Biological Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Vsevolod V Gurevich
- §Department of Pharmacology, Vanderbilt University, Nashville, Tennessee 37232, United States
| | - Reinhard Grisshammer
- †Membrane Protein Structure Function Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Department of Health and Human Services, Rockville, Maryland 20852, United States
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45
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Astafyeva K, Urbach W, Garroum N, Taulier N, Thiam AR. Stability of C(12)E(j) Bilayers Probed with Adhesive Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6791-6796. [PMID: 26035626 DOI: 10.1021/acs.langmuir.5b00749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The stability of model surfactant bilayers from the poly(ethylene glycol) mono-n-dodecyl ether (C12Ej) family was probed. The surfactant bilayers were formed by the adhesion of emulsion droplets. We generated C12Ej bilayers by forming water-in-oil (w/o) emulsions with saline water droplets, covered by the surfactant, in a silicone and octane oil mixture. Using microfluidics, we studied the stability of those bilayers. C12E1 allowed only short-lived bilayers whereas C12E2 bilayers were stable over a wide range of oil mixtures. At high C12E2 concentration, a two-phase region was displayed in the phase diagram: bilayers formed by the adhesion of two water droplets and Janus-like particles consisting of adhering aqueous and amphiphilic droplets. C12E8 and C12E25 did not mediate bilayer formation and caused phase inversion leading to o/w emulsion. With intermediate C12E4 and C12E5 surfactants, both w/o and o/w emulsions were unstable. We provided the titration of the C12E2 bilayer with C12E4 and C12E5 to study and predict their stability behavior.
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Affiliation(s)
- Ksenia Astafyeva
- †Laboratoire de Physique Statistique, Ecole Normale Supérieure, Sorbonne Universités, UPMC Université, and Université Paris Diderot, CNRS, 24 rue Lhomond, F-75005 Paris, France
| | - Wladimir Urbach
- †Laboratoire de Physique Statistique, Ecole Normale Supérieure, Sorbonne Universités, UPMC Université, and Université Paris Diderot, CNRS, 24 rue Lhomond, F-75005 Paris, France
- ‡Université René Descartes, Paris, France
| | - Nabil Garroum
- †Laboratoire de Physique Statistique, Ecole Normale Supérieure, Sorbonne Universités, UPMC Université, and Université Paris Diderot, CNRS, 24 rue Lhomond, F-75005 Paris, France
| | - Nicolas Taulier
- §Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire d'Imagerie Biomédicale, INSERM, F-75006 Paris, France
| | - Abdou R Thiam
- †Laboratoire de Physique Statistique, Ecole Normale Supérieure, Sorbonne Universités, UPMC Université, and Université Paris Diderot, CNRS, 24 rue Lhomond, F-75005 Paris, France
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Bell AJ, Frankel LK, Bricker TM. High Yield Non-detergent Isolation of Photosystem I-Light-harvesting Chlorophyll II Membranes from Spinach Thylakoids: IMPLICATIONS FOR THE ORGANIZATION OF THE PS I ANTENNAE IN HIGHER PLANTS. J Biol Chem 2015; 290:18429-37. [PMID: 26055710 DOI: 10.1074/jbc.m115.663872] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Indexed: 11/06/2022] Open
Abstract
Styrene-maleic acid copolymer was used to effect a non-detergent partial solubilization of thylakoids from spinach. A high density membrane fraction, which was not solubilized by the copolymer, was isolated and was highly enriched in the Photosystem (PS) I-light-harvesting chlorophyll (LHC) II supercomplex and depleted of PS II, the cytochrome b6/f complex, and ATP synthase. The LHC II associated with the supercomplex appeared to be energetically coupled to PS I based on 77 K fluorescence, P700 photooxidation, and PS I electron transport light saturation experiments. The chlorophyll (Chl) a/b ratio of the PS I-LHC II membranes was 3.2 ± 0.9, indicating that on average, three LHC II trimers may associate with each PS I. The implication of these findings within the context of higher plant PS I antenna organization is discussed.
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Affiliation(s)
- Adam J Bell
- From the Department of Biological Sciences, Biochemistry and Molecular Biology Section, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Laurie K Frankel
- From the Department of Biological Sciences, Biochemistry and Molecular Biology Section, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Terry M Bricker
- From the Department of Biological Sciences, Biochemistry and Molecular Biology Section, Louisiana State University, Baton Rouge, Louisiana 70803
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47
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Cao R, Rossetti G, Bauer A, CarIoni P. Binding of the Antagonist Caffeine to the Human Adenosine Receptor hA2AR in Nearly Physiological Conditions. PLoS One 2015; 10:e0126833. [PMID: 25992797 PMCID: PMC4439127 DOI: 10.1371/journal.pone.0126833] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 04/08/2015] [Indexed: 12/27/2022] Open
Abstract
Lipid composition may significantly affect membrane proteins function, yet its impact on the protein structural determinants is not well understood. Here we present a comparative molecular dynamics (MD) study of the human adenosine receptor type 2A (hA(2A)R) in complex with caffeine--a system of high neuro-pharmacological relevance--within different membrane types. These are POPC, mixed POPC/POPE and cholesterol-rich membranes. 0.8-μs MD simulations unambiguously show that the helical folding of the amphipathic helix 8 depends on membrane contents. Most importantly, the distinct cholesterol binding into the cleft between helix 1 and 2 stabilizes a specific caffeine-binding pose against others visited during the simulation. Hence, cholesterol presence (~33%-50% in synaptic membrane in central nervous system), often neglected in X-ray determination of membrane proteins, affects the population of the ligand binding poses. We conclude that including a correct description of neuronal membranes may be very important for computer-aided design of ligands targeting hA(2A)R and possibly other GPCRs.
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Affiliation(s)
- Ruyin Cao
- German Research School for Simulation Sciences (joint venture of RWTH Aachen University and Forschungszentrum Jülich GmbH), D-52425, Jülich, Germany
- Computational Biomedicine, Institute for Advanced Simulation (IAS-5), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
| | - Giulia Rossetti
- German Research School for Simulation Sciences (joint venture of RWTH Aachen University and Forschungszentrum Jülich GmbH), D-52425, Jülich, Germany
- Computational Biomedicine, Institute for Advanced Simulation (IAS-5), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
- Institute of Neuroscience and Medicine (INM-9), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
- Jülich Supercomputing Centre (JSC), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
| | - Andreas Bauer
- Institute of Neuroscience and Medicine (INM-2), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
| | - Paolo CarIoni
- German Research School for Simulation Sciences (joint venture of RWTH Aachen University and Forschungszentrum Jülich GmbH), D-52425, Jülich, Germany
- Computational Biomedicine, Institute for Advanced Simulation (IAS-5), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
- Institute of Neuroscience and Medicine (INM-9), Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany
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48
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Quast RB, Kortt O, Henkel J, Dondapati SK, Wüstenhagen DA, Stech M, Kubick S. Automated production of functional membrane proteins using eukaryotic cell-free translation systems. J Biotechnol 2015; 203:45-53. [PMID: 25828454 DOI: 10.1016/j.jbiotec.2015.03.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 03/16/2015] [Accepted: 03/19/2015] [Indexed: 12/14/2022]
Abstract
Due to their high abundance and pharmacological relevance there is a growing demand for the efficient production of functional membrane proteins. In this context, cell-free protein synthesis represents a valuable alternative that allows for the high-throughput synthesis of functional membrane proteins. Here, we demonstrate the potential of our cell-free protein synthesis system, based on lysates from cultured Spodoptera frugiperda 21 cells, to produce pro- and eukaryotic membrane proteins with individual topological characteristics in an automated fashion. Analytical techniques, including confocal laser scanning microscopy, fluorescence detection of eYFP fusion proteins in a microplate reader and in-gel fluorescence of statistically incorporated fluorescent amino acid derivatives were employed. The reproducibility of our automated synthesis approach is underlined by coefficients of variation below 7.2%. Moreover, the functionality of the cell-free synthesized potassium channel KcsA was analyzed electrophysiologically. Finally, we expanded our cell-free membrane protein synthesis system by an orthogonal tRNA/synthetase pair for the site-directed incorporation of p-Azido-l-phenylalanine based on stop codon suppression. Incorporation was optimized by performance of a two-dimensional screening with different Mg(2+) and lysate concentrations. Subsequently, the selective modification of membrane proteins with incorporated p-Azido-l-phenylalanine was exemplified by Staudinger ligation with a phosphine-based fluorescence dye.
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Affiliation(s)
- Robert B Quast
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Oliver Kortt
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Jörg Henkel
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Srujan K Dondapati
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Doreen A Wüstenhagen
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Marlitt Stech
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany
| | - Stefan Kubick
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany.
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Abstract
In recent years much effort has been put towards innovative developments to overcome the numerous obstacles associated with structure determination of membrane proteins by X-ray crystallography. The advent of genomics and proteomics initiatives combined with high-throughput technologies, such as automation, miniaturization, integration, and third-generation synchrotrons, has enhanced membrane protein structure determination rate. Nevertheless, crystallization of membrane proteins still remains one of the most troublesome hurdles that every structural group must undertake. This chapter presents high-throughput methods easily available to any researcher interested in membrane protein characterization and crystallization. It is our hope this chapter can be used as a positive guide to all who are attempting crystallizing membrane proteins.
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Affiliation(s)
- Isabel Moraes
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK,
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50
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Schonenbach NS, Hussain S, O'Malley MA. Structure and function of G protein‐coupled receptor oligomers: implications for drug discovery. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2014; 7:408-27. [DOI: 10.1002/wnan.1319] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 09/26/2014] [Accepted: 10/11/2014] [Indexed: 12/21/2022]
Affiliation(s)
- Nicole S. Schonenbach
- Department of Chemical EngineeringUniversity of California Santa BarbaraSanta BarbaraCAUSA
| | - Sunyia Hussain
- Department of Chemical EngineeringUniversity of California Santa BarbaraSanta BarbaraCAUSA
| | - Michelle A. O'Malley
- Department of Chemical EngineeringUniversity of California Santa BarbaraSanta BarbaraCAUSA
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