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McKenzie DM, Wirth D, Pogorelov TV, Hristova K. Utility of FRET in studies of membrane protein oligomerization: The concept of the effective dissociation constant. Biophys J 2023; 122:4113-4120. [PMID: 37735871 PMCID: PMC10598290 DOI: 10.1016/j.bpj.2023.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/07/2023] [Accepted: 09/18/2023] [Indexed: 09/23/2023] Open
Abstract
The activity of many membrane receptors is controlled through their lateral association into dimers or higher-order oligomers. Although Förster resonance energy transfer (FRET) measurements have been used extensively to characterize the stability of receptor dimers, the utility of FRET in studies of larger oligomers has been limited. Here we introduce an effective equilibrium dissociation constant that can be extracted from FRET measurements for EphA2, a receptor tyrosine kinase (RTK) known to form active oligomers of heterogeneous distributions in response to its ligand ephrinA1-Fc. The newly introduced effective equilibrium dissociation constant has a well-defined physical meaning and biological significance. It denotes the receptor concentration for which half of the receptors are monomeric and inactive, and the other half are associated into oligomers and are active, irrespective of the exact oligomer size. This work introduces a new dimension to the utility of FRET in studies of membrane receptor association and signaling in the plasma membrane.
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Affiliation(s)
- Daniel M McKenzie
- Department of Materials Science and Engineering, Johns Hopkins University, 3400 Charles Street, Baltimore, Maryland
| | - Daniel Wirth
- Department of Materials Science and Engineering, Johns Hopkins University, 3400 Charles Street, Baltimore, Maryland
| | - Taras V Pogorelov
- Department of Chemistry, Center for Biophysics and Quantitative Biology, School of Chemical Sciences, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Kalina Hristova
- Department of Materials Science and Engineering, Johns Hopkins University, 3400 Charles Street, Baltimore, Maryland.
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2
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Diversity of Structural, Dynamic, and Environmental Effects Explain a Distinctive Functional Role of Transmembrane Domains in the Insulin Receptor Subfamily. Int J Mol Sci 2023; 24:ijms24043906. [PMID: 36835322 PMCID: PMC9965288 DOI: 10.3390/ijms24043906] [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: 12/31/2022] [Revised: 02/04/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
Human InsR, IGF1R, and IRR receptor tyrosine kinases (RTK) of the insulin receptor subfamily play an important role in signaling pathways for a wide range of physiological processes and are directly associated with many pathologies, including neurodegenerative diseases. The disulfide-linked dimeric structure of these receptors is unique among RTKs. Sharing high sequence and structure homology, the receptors differ dramatically in their localization, expression, and functions. In this work, using high-resolution NMR spectroscopy supported by atomistic computer modeling, conformational variability of the transmembrane domains and their interactions with surrounding lipids were found to differ significantly between representatives of the subfamily. Therefore, we suggest that the heterogeneous and highly dynamic membrane environment should be taken into account in the observed diversity of the structural/dynamic organization and mechanisms of activation of InsR, IGF1R, and IRR receptors. This membrane-mediated control of receptor signaling offers an attractive prospect for the development of new targeted therapies for diseases associated with dysfunction of insulin subfamily receptors.
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3
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Keller F, Alavizargar A, Wedlich-Söldner R, Heuer A. The impact of bilayer composition on the dimerization properties of the Slg1 stress sensor TMD from a multiscale analysis. Phys Chem Chem Phys 2023; 25:1299-1309. [PMID: 36533706 DOI: 10.1039/d2cp03497b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The impact of mutual interactions between the transmembrane domains of membrane proteins and lipids on bilayer properties has gained major attraction. Most simulation studies of membranes rely on the Martini force field, which has proven extremely helpful in providing molecular insights into realistic systems. Accordingly, an evaluation of the accuracy of the Martini force field is crucial to be able to correctly interpret the reported data. In this study, we combine atomistic and coarse-grained Martini simulations to investigate the properties of transmembrane domains (TMDs) in a model yeast membrane. The results show that the TMD binding state (monomeric and dimeric with positive or negative crossing angle) and the membrane composition significantly influence the properties around the TMDs and change TMD-TMD and TMD-lipid affinities. Furthermore, ergosterol (ERG) exhibits a strong affinity to TMD dimers. Importantly, the right-handed TMD dimer configuration is stabilized via TMD-TMD contacts by the addition of asymmetric anionic phosphatidylserine (PS). The coarse-grained simulations corroborate many of these findings, with two notable exceptions: a systematic overestimation of TMD-ERG interaction and lack of stabilization of the right-handed TMD dimers with the addition of PS.
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Affiliation(s)
- Fabian Keller
- Institut für Physikalische Chemie, Corrensstraße 28, Münster, Germany.
| | | | | | - Andreas Heuer
- Institut für Physikalische Chemie, Corrensstraße 28, Münster, Germany.
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4
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Zhao W, Wei Z, Xin G, Li Y, Yuan J, Ming Y, Ji C, Sun Q, Li S, Chen X, Fu W, Zhu Y, Niu H, Huang W. Piezo1 initiates platelet hyperreactivity and accelerates thrombosis in hypertension. J Thromb Haemost 2021; 19:3113-3125. [PMID: 34411418 DOI: 10.1111/jth.15504] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 07/21/2021] [Accepted: 08/18/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Thrombosis is the pathological basis of cardiovascular and cerebrovascular diseases, which seriously threaten human life and health. Among them, nearly half of cardiovascular disease patients suffer from severe hypertension complications. Hypertension is thought to cause abnormal platelet activation and increases the risk of thrombosis, but the related mechanism is still vague. OBJECTIVES This study hypothesized that the abnormal hemodynamics of blood under hypertension might affect platelet function and accelerate thrombosis by activating mechanoreceptor Piezo1. METHODS To assess the activation effect of hypertension on mechanoreceptor Piezo1, we injected Piezo1 agonist Yoda1 and antagonist GsMTx-4 through the tail vein, then examined the platelet activation status and thrombosis. RESULTS Our results displayed that antagonist GsMTx-4 effectively inhibited calcium influx caused by hypertension and agonist Yoda1. Antithrombotic studies proved that the inhibition of Piezo1 effectively inhibited arterial thrombosis and reduced the infarct size of stroke in hypertensive mice. CONCLUSIONS Our study explains the activation of mechanoreceptor Piezo1 under hypertension is the key to abnormal platelet activation and thrombosis while providing novel platelet intervention strategies to prevent thrombosis.
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Affiliation(s)
- Weiyu Zhao
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
| | - Zeliang Wei
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
| | - Guang Xin
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
| | - Yulong Li
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
| | - Jiyan Yuan
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
| | - Yue Ming
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
| | - Chengjie Ji
- Department of Laboratory Medicine, The People's Hospital of Jianyang City, Jianyang, China
| | - Qiushi Sun
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
| | - Shiyi Li
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
| | - Xinchuan Chen
- Division of Hematology, West China Hospital, Sichuan University, Chengdu, China
| | - Wei Fu
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Ye Zhu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China
| | - Hai Niu
- College of Mathematics, Sichuan University, Chengdu, China
| | - Wen Huang
- Laboratory of Ethnopharmacology, West China Hospital, Sichuan University, Chengdu, China
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5
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Bioengineered System for High Throughput Screening of Kv1 Ion Channel Blockers. Bioengineering (Basel) 2021; 8:bioengineering8110187. [PMID: 34821753 PMCID: PMC8614864 DOI: 10.3390/bioengineering8110187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/03/2021] [Accepted: 11/10/2021] [Indexed: 12/12/2022] Open
Abstract
Screening drug candidates for their affinity and selectivity for a certain binding site is a crucial step in developing targeted therapy. Here, we created a screening assay for receptor binding that can be easily scaled up and automated for the high throughput screening of Kv channel blockers. It is based on the expression of the KcsA-Kv1 hybrid channel tagged with a fluorescent protein in the E. coli membrane. In order to make this channel accessible for the soluble compounds, E. coli were transformed into spheroplasts by disruption of the cellular peptidoglycan envelope. The assay was evaluated using a hybrid KcsA-Kv1.3 potassium channel tagged with a red fluorescent protein (TagRFP). The binding of Kv1.3 channel blockers was measured by flow cytometry either by using their fluorescent conjugates or by determining the ability of unconjugated compounds to displace fluorescently labeled blockers with a known affinity. A fraction of the occupied receptor was calculated with a dedicated pipeline available as a Jupyter notebook. Measured binding constants for agitoxin-2, charybdotoxin and kaliotoxin were in firm agreement with the earlier published data. By using a mid-range flow cytometer with manual sample handling, we measured and analyzed up to ten titration curves (eight data points each) in one day. Finally, we considered possibilities for multiplexing, scaling and automation of the assay.
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6
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Structural Studies Providing Insights into Production and Conformational Behavior of Amyloid-β Peptide Associated with Alzheimer's Disease Development. MOLECULES (BASEL, SWITZERLAND) 2021; 26:molecules26102897. [PMID: 34068293 PMCID: PMC8153327 DOI: 10.3390/molecules26102897] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 12/18/2022]
Abstract
Alzheimer's disease is the most common type of neurodegenerative disease in the world. Genetic evidence strongly suggests that aberrant generation, aggregation, and/or clearance of neurotoxic amyloid-β peptides (Aβ) triggers the disease. Aβ accumulates at the points of contact of neurons in ordered cords and fibrils, forming the so-called senile plaques. Aβ isoforms of different lengths are found in healthy human brains regardless of age and appear to play a role in signaling pathways in the brain and to have neuroprotective properties at low concentrations. In recent years, different substances have been developed targeting Aβ production, aggregation, interaction with other molecules, and clearance, including peptide-based drugs. Aβ is a product of sequential cleavage of the membrane glycoprotein APP (amyloid precursor protein) by β- and γ-secretases. A number of familial mutations causing an early onset of the disease have been identified in the APP, especially in its transmembrane domain. The mutations are reported to influence the production, oligomerization, and conformational behavior of Aβ peptides. This review highlights the results of structural studies of the main proteins involved in Alzheimer's disease pathogenesis and the molecular mechanisms by which perspective therapeutic substances can affect Aβ production and nucleation.
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7
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Pawar AB, Sengupta D. Role of Cholesterol in Transmembrane Dimerization of the ErbB2 Growth Factor Receptor. J Membr Biol 2021; 254:301-310. [PMID: 33506276 DOI: 10.1007/s00232-021-00168-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 01/05/2021] [Indexed: 11/28/2022]
Abstract
The association of ErbB2 growth factor receptors is critical for cell growth and potentiates tumor proliferation in several cancer types. An important aspect in ErbB2 association is the role of lipids such as cholesterol, especially since their metabolism is often reprogrammed in cancer cells. Here, we have coupled metadynamics with coarse-grain simulations to identify cholesterol effects in the transmembrane dimerization of ErbB2 receptors. Overall, cholesterol interactions are observed with the receptor that directly tunes the association energetics. Several dimer conformations are identified both in the presence and absence of cholesterol, although the dimer regime appears to be more favorable in the presence of cholesterol. We observe an overall modulation of the underlying energy profile and the symmetric active and inactive conformational states are not distinguished in the presence of cholesterol. We show that cholesterol binds to the receptor transmembrane domain at a site (CRAC motif) that overlaps with the dimer interface (SmXXXSm motif). The competition between the transmembrane interactions and cholesterol interactions decides the final conformational landscape. Our work is an important step toward characterizing cholesterol effects in ErbB2 membrane receptor function.
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Affiliation(s)
- Aiswarya B Pawar
- CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Durba Sengupta
- CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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8
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Structural studies of full-length receptor tyrosine kinases and their implications for drug design. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2020; 124:311-336. [PMID: 33632469 DOI: 10.1016/bs.apcsb.2020.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Receptor tyrosine kinases (RTKs) are important drug targets for cancer and immunological disorders. Crystal structures of individual RTK domains have contributed greatly to the structure-based drug design of clinically used drugs. Low-resolution structures from electron microscopy are now available for the RTKs, EGFR, PDGFR, and Kit. However, there are still no high-resolution structures of full-length RTKs due to the technical challenges of working with these complex, membrane proteins. Here, we review what has been learned from structural studies of these three RTKs regarding their mechanisms of ligand binding, activation, oligomerization, and inhibition. We discuss the implications for drug design. More structural data on full-length RTKs may facilitate the discovery of druggable sites and drugs with improved specificity and effectiveness against resistant mutants.
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9
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Kuznetsov AS, Zamaletdinov MF, Bershatsky YV, Urban AS, Bocharova OV, Bennasroune A, Maurice P, Bocharov EV, Efremov RG. Dimeric states of transmembrane domains of insulin and IGF-1R receptors: Structures and possible role in activation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183417. [PMID: 32710851 DOI: 10.1016/j.bbamem.2020.183417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/21/2020] [Accepted: 07/07/2020] [Indexed: 01/07/2023]
Abstract
Despite the biological significance of insulin signaling, the molecular mechanisms of activation of the insulin receptor (IR) and other proteins from its family remain elusive. Current hypothesis on signal transduction suggests ligand-triggered structural changes in the extracellular domain followed by transmembrane (TM) domains closure and dimerization leading to trans-autophosphorylation and kinase activity in intracellular segments of the receptor. Using NMR spectroscopy, we detected dimerization of isolated TM segments of IR in different membrane-mimicking environments and observed multiple signals of NH groups of protein backbone possibly corresponding to several dimer conformations. Taking available experimental data as constraints, several atomistic models of dimeric TM domains of IR and insulin-like growth factor 1 (IGF-1R) receptors were elaborated. Molecular dynamics simulations of IR ectodomain revealed noticeable collective movements potentially responsible for closure of the C-termini of FnIII-3 domains and spatial approaching of TM helices upon insulin-induced receptor activation. In addition, we demonstrated that the intracellular part of the receptor does not impose restrictions on the positioning of TM helices in the membrane. Finally, we used two independent structure prediction methods to generate a series of dimer conformations followed by their cluster analysis and dimerization free energy estimation to select the best dimer models. Biological relevance of the later was further tested via comparison of the hydrophobic organization of TM helices for both wild-type receptors and their mutants. Based on these data, the ability of several segments from other proteins to functionally replace IR and/or IGF-1R TM domains was explained.
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Affiliation(s)
- Andrey S Kuznetsov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation; National Research University Higher School of Economics, Myasnitskaya ul. 20, Moscow 101000, Russian Federation; Moscow Institute of Physics and Technology, Institutsky per., 9, Dolgoprudnyi 141700, Russian Federation
| | - Miftakh F Zamaletdinov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation; Lomonosov Moscow State University, Leninskiye Gory, 1, Moscow 119991, Russian Federation
| | - Yaroslav V Bershatsky
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation; Moscow Institute of Physics and Technology, Institutsky per., 9, Dolgoprudnyi 141700, Russian Federation
| | - Anatoly S Urban
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation; Moscow Institute of Physics and Technology, Institutsky per., 9, Dolgoprudnyi 141700, Russian Federation
| | - Olga V Bocharova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation; Moscow Institute of Physics and Technology, Institutsky per., 9, Dolgoprudnyi 141700, Russian Federation
| | - Amar Bennasroune
- UMR CNRS 7369 Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), Université de Reims Champagne Ardenne (URCA), UFR Sciences Exactes et Naturelles, Reims, France
| | - Pascal Maurice
- UMR CNRS 7369 Matrice Extracellulaire et Dynamique Cellulaire (MEDyC), Université de Reims Champagne Ardenne (URCA), UFR Sciences Exactes et Naturelles, Reims, France
| | - Eduard V Bocharov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation; Moscow Institute of Physics and Technology, Institutsky per., 9, Dolgoprudnyi 141700, Russian Federation
| | - Roman G Efremov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation; National Research University Higher School of Economics, Myasnitskaya ul. 20, Moscow 101000, Russian Federation; Moscow Institute of Physics and Technology, Institutsky per., 9, Dolgoprudnyi 141700, Russian Federation.
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10
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Engineering Stem Cell Factor Ligands with Different c-Kit Agonistic Potencies. Molecules 2020; 25:molecules25204850. [PMID: 33096693 PMCID: PMC7588011 DOI: 10.3390/molecules25204850] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/14/2020] [Accepted: 10/19/2020] [Indexed: 11/17/2022] Open
Abstract
Receptor tyrosine kinases (RTKs) are major players in signal transduction, regulating cellular activities in both normal regeneration and malignancy. Thus, many RTKs, c-Kit among them, play key roles in the function of both normal and neoplastic cells, and as such constitute attractive targets for therapeutic intervention. We thus sought to manipulate the self-association of stem cell factor (SCF), the cognate ligand of c-Kit, and hence its suboptimal affinity and activation potency for c-Kit. To this end, we used directed evolution to engineer SCF variants having different c-Kit activation potencies. Our yeast-displayed SCF mutant (SCFM) library screens identified altered dimerization potential and increased affinity for c-Kit by specific SCF-variants. We demonstrated the delicate balance between SCF homo-dimerization, c-Kit binding, and agonistic potencies by structural studies, in vitro binding assays and a functional angiogenesis assay. Importantly, our findings showed that a monomeric SCF variant exhibited superior agonistic potency vs. the wild-type SCF protein and vs. other high-affinity dimeric SCF variants. Our data showed that action of the monomeric ligands in binding to the RTK monomers and inducing receptor dimerization and hence activation was superior to that of the wild-type dimeric ligand, which has a higher affinity to RTK dimers but a lower activation potential. The findings of this study on the binding and c-Kit activation of engineered SCF variants thus provides insights into the structure–function dynamics of ligands and RTKs.
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11
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Balatskaya MN, Baglay AI, Rubtsov YP, Sharonov GV. Analysis of GPI-Anchored Receptor Distribution and Dynamics in Live Cells by Tag-mediated Enzymatic Labeling and FRET. Methods Protoc 2020; 3:mps3020033. [PMID: 32349461 PMCID: PMC7359698 DOI: 10.3390/mps3020033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/25/2020] [Accepted: 04/26/2020] [Indexed: 01/17/2023] Open
Abstract
The analysis of glycosylphosphatidylinositol (GPI)-anchored receptor distribution and dynamics in live cells is challenging, because their clusters exhibit subdiffraction-limited sizes and are highly dynamic. However, the cellular response depends on the GPI-anchored receptor clusters' distribution and dynamics. Here, we compare three approaches to GPI-anchored receptor labeling (with antibodies, fluorescent proteins, and enzymatically modified small peptide tags) and use several variants of Förster resonance energy transfer (FRET) detection by confocal microscopy and flow cytometry in order to obtain insight into the distribution and the ligand-induced dynamics of GPI-anchored receptors. We found that the enzyme-mediated site-specific fluorescence labeling of T-cadherin modified with a short peptide tag (12 residues in length) have several advantages over labeling by fluorescent proteins or antibodies, including (i) the minimized distortion of the protein's properties, (ii) the possibility to use a cell-impermeable fluorescent substrate that allows for selective labeling of surface-exposed proteins in live cells, and (iii) superior control of the donor to acceptor molar ratio. We successfully detected the FRET of GPI-anchored receptors, T-cadherin, and ephrin-A1, without ligands, and showed in real time that adiponectin induces stable T-cadherin cluster formation. In this paper (which is complementary to our recent research (Balatskaya et al., 2019)), we present the practical aspects of labeling and the heteroFRET measurements of GPI-anchored receptors to study their dynamics on a plasma membrane in live cells.
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Affiliation(s)
- Maria N. Balatskaya
- Faculty of Medicine, Lomonosov Moscow State University, Lomonosovskiy av. 27-1, 119192 Moscow, Russia; (A.I.B.); (Y.P.R.); (G.V.S.)
- Correspondence:
| | - Alexandra I. Baglay
- Faculty of Medicine, Lomonosov Moscow State University, Lomonosovskiy av. 27-1, 119192 Moscow, Russia; (A.I.B.); (Y.P.R.); (G.V.S.)
| | - Yury P. Rubtsov
- Faculty of Medicine, Lomonosov Moscow State University, Lomonosovskiy av. 27-1, 119192 Moscow, Russia; (A.I.B.); (Y.P.R.); (G.V.S.)
- Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - George V. Sharonov
- Faculty of Medicine, Lomonosov Moscow State University, Lomonosovskiy av. 27-1, 119192 Moscow, Russia; (A.I.B.); (Y.P.R.); (G.V.S.)
- Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Ostrovitianov str. 1, 117997 Moscow, Russia
- Laboratory of Genomics of Antitumor Adaptive Immunity, Privolzhsky Research Medical University, 10/1 Minin & Pozharsky sq., 603005 Nizhny Novgorod, Russia
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12
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Dong R, Tan Y, Fan A, Liao Z, Liu H, Wei P. Molecular Dynamics of the Recruitment of Immunoreceptor Signaling Module DAP12 Homodimer to Lipid Raft Boundary Regulated by PIP2. J Phys Chem B 2020; 124:504-510. [PMID: 31888335 DOI: 10.1021/acs.jpcb.9b11095] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Lipid raft microdomain of the plasma membrane is implicated in various biological and pathological processes. The involvement of lipid raft in T cell receptor (TCR) signal transduction has been widely studied, whereas the role of these structures in immunoreceptor signaling by DAP12 in natural killing (NK) cells remains largely unknown. Here, we demonstrate that phosphatidylinositol 4,5-bisphosphate (PIP2) lipid localized to lipid raft boundary in our coarse-grained (CG) model raft-forming membrane, and this negatively charged lipid recruits DAP12 homodimer into lipid raft boundary through protein-lipid interaction between the basic-rich regions and signaling immunoreceptor tyrosine-based activation motifs (ITAMs) of DAP12 and PIP2. Furthermore, our results reveal that the protein-lipid interaction can be disrupted by Ca2+, which competitively binds to PIP2 instead of DAP12. As a result, the cytoplasmic region of DAP12 homodimer is dissociated from the membrane back to the nonraft domain, and the ITAMs are exposed to allow further downstream signaling. These findings provide fundamental insights to understand the mechanism of signal transduction in NK cells regulated by membrane microenvironment.
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Affiliation(s)
- Ruijuan Dong
- School of Traditional Chinese Medicine , Beijing University of Chinese Medicine , Beijing 100029 , China.,Beijing Key Laboratory of Bioprocess, College of Life Science and Technology , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Yan Tan
- School of Life Science , Beijing University of Chinese Medicine , Beijing 100029 , China
| | - Angran Fan
- School of Traditional Chinese Medicine , Beijing University of Chinese Medicine , Beijing 100029 , China
| | - Zehuan Liao
- School of Biological Sciences , Nanyang Technological University , Singapore 637551.,Department of Microbiology, Tumor, and Cell Biology (MTC) , Karolinska Institute , Stockholm 17177 , Sweden
| | - Hangrui Liu
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Peng Wei
- School of Traditional Chinese Medicine , Beijing University of Chinese Medicine , Beijing 100029 , China.,Beijing Key Laboratory of Bioprocess, College of Life Science and Technology , Beijing University of Chemical Technology , Beijing 100029 , China
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13
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Shtykova EV, Petoukhov MV, Mozhaev AA, Deyev IE, Dadinova LA, Loshkarev NA, Goryashchenko AS, Bocharov EV, Jeffries CM, Svergun DI, Batishchev OV, Petrenko AG. The dimeric ectodomain of the alkali-sensing insulin receptor-related receptor (ectoIRR) has a droplike shape. J Biol Chem 2019; 294:17790-17798. [PMID: 31615897 PMCID: PMC6879334 DOI: 10.1074/jbc.ra119.010390] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/10/2019] [Indexed: 09/10/2023] Open
Abstract
Insulin receptor-related receptor (IRR) is a receptor tyrosine kinase of the insulin receptor family and functions as an extracellular alkali sensor that controls metabolic alkalosis in the regulation of the acid-base balance. In the present work, we sought to analyze structural features of IRR by comparing them with those of the insulin receptor, which is its closest homolog but does not respond to pH changes. Using small-angle X-ray scattering (SAXS) and atomic force microscopy (AFM), we investigated the overall conformation of the recombinant soluble IRR ectodomain (ectoIRR) at neutral and alkaline pH. In contrast to the well-known inverted U-shaped (or λ-shaped) conformation of the insulin receptor, the structural models reconstructed at different pH values revealed that the ectoIRR organization has a "droplike" shape with a shorter distance between the fibronectin domains of the disulfide-linked dimer subunits within ectoIRR. We detected no large-scale pH-dependent conformational changes of ectoIRR in both SAXS and AFM experiments, an observation that agreed well with previous biochemical and functional analyses of IRR. Our findings indicate that ectoIRR's sensing of alkaline conditions involves additional molecular mechanisms, for example engagement of receptor juxtamembrane regions or the surrounding lipid environment.
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Affiliation(s)
- Eleonora V Shtykova
- A. V. Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow 119333, Russia
| | - Maxim V Petoukhov
- A. V. Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow 119333, Russia
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Moscow 119071, Russia
| | - Andrey A Mozhaev
- A. V. Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow 119333, Russia
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
| | - Igor E Deyev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
| | - Liubov A Dadinova
- A. V. Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow 119333, Russia
| | - Nikita A Loshkarev
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Moscow 119071, Russia
- Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region 141701, Russia
| | - Alexander S Goryashchenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
| | - Eduard V Bocharov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
- Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region 141701, Russia
| | - Cy M Jeffries
- European Molecular Biology Laboratory, EMBL Hamburg Unit, 22607 Hamburg, Germany
| | - Dmitri I Svergun
- European Molecular Biology Laboratory, EMBL Hamburg Unit, 22607 Hamburg, Germany
| | - Oleg V Batishchev
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Moscow 119071, Russia
- Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region 141701, Russia
| | - Alexander G Petrenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow 117997, Russia
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14
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The Effect of Transmembrane Protein Shape on Surrounding Lipid Domain Formation by Wetting. Biomolecules 2019; 9:biom9110729. [PMID: 31726783 PMCID: PMC6920788 DOI: 10.3390/biom9110729] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 11/09/2019] [Accepted: 11/11/2019] [Indexed: 12/11/2022] Open
Abstract
Signal transduction through cellular membranes requires the highly specific and coordinated work of specialized proteins. Proper functioning of these proteins is provided by an interplay between them and the lipid environment. Liquid-ordered lipid domains are believed to be important players here, however, it is still unclear whether conditions for a phase separation required for lipid domain formation exist in cellular membranes. Moreover, membrane leaflets are compositionally asymmetric, that could be an obstacle for the formation of symmetric domains spanning the lipid bilayer. We theoretically show that the presence of protein in the membrane leads to the formation of a stable liquid-ordered lipid phase around it by the mechanism of protein wetting by lipids, even in the absence of conditions necessary for the global phase separation in the membrane. Moreover, we show that protein shape plays a crucial role in this process, and protein conformational rearrangement can lead to changes in the size and characteristics of surrounding lipid domains.
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15
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Different spatiotemporal organization of GPI-anchored T-cadherin in response to low-density lipoprotein and adiponectin. Biochim Biophys Acta Gen Subj 2019; 1863:129414. [DOI: 10.1016/j.bbagen.2019.129414] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 07/23/2019] [Accepted: 08/07/2019] [Indexed: 01/10/2023]
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16
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Paul MD, Hristova K. The transition model of RTK activation: A quantitative framework for understanding RTK signaling and RTK modulator activity. Cytokine Growth Factor Rev 2019; 49:23-31. [PMID: 31711797 PMCID: PMC6898792 DOI: 10.1016/j.cytogfr.2019.10.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 10/10/2019] [Indexed: 01/15/2023]
Abstract
Here, we discuss the transition model of receptor tyrosine kinase (RTK) activation, which is derived from biophysical investigations of RTK interactions and signaling. The model postulates that (1) RTKs can interact laterally to form dimers even in the absence of ligand, (2) different unliganded RTK dimers have different stabilities, (3) ligand binding stabilizes the RTK dimers, and (4) ligand binding causes structural changes in the RTK dimer. The model is grounded in the principles of physical chemistry and provides a framework to understand RTK activity and to make predictions in quantitative terms. It can guide basic research aimed at uncovering the mechanism of RTK activation and, in the long run, can empower the search for modulators of RTK function.
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Affiliation(s)
- Michael D Paul
- Department of Materials Science and Engineering, Institute for NanoBioTechnology, and Program in Molecular Biophysics, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Kalina Hristova
- Department of Materials Science and Engineering, Institute for NanoBioTechnology, and Program in Molecular Biophysics, Johns Hopkins University, Baltimore, MD, 21218, United States.
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17
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Abstract
Receptor tyrosine kinases (RTKs) play important roles in cell growth, motility, differentiation, and survival. These single-pass membrane proteins are grouped into subfamilies based on the similarity of their extracellular domains. They are generally thought to be activated by ligand binding, which promotes homodimerization and then autophosphorylation in trans. However, RTK interactions are more complicated, as RTKs can interact in the absence of ligand and heterodimerize within and across subfamilies. Here, we review the known cross-subfamily RTK heterointeractions and their possible biological implications, as well as the methodologies which have been used to study them. Moreover, we demonstrate how thermodynamic models can be used to study RTKs and to explain many of the complicated biological effects which have been described in the literature. Finally, we discuss the concept of the RTK interactome: a putative, extensive network of interactions between the RTKs. This RTK interactome can produce unique signaling outputs; can amplify, inhibit, and modify signaling; and can allow for signaling backups. The existence of the RTK interactome could provide an explanation for the irreproducibility of experimental data from different studies and for the failure of some RTK inhibitors to produce the desired therapeutic effects. We argue that a deeper knowledge of RTK interactome thermodynamics can lead to a better understanding of fundamental RTK signaling processes in health and disease. We further argue that there is a need for quantitative, thermodynamic studies that probe the strengths of the interactions between RTKs and their ligands and between different RTKs.
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Affiliation(s)
- Michael D. Paul
- Department of Materials Science and Engineering, Institute for NanoBioTechnology, and Program in Molecular Biophysics, Johns Hopkins University, Baltimore MD 21218
| | - Kalina Hristova
- Department of Materials Science and Engineering, Institute for NanoBioTechnology, and Program in Molecular Biophysics, Johns Hopkins University, Baltimore MD 21218
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18
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Shi L, Cavagnino A, Rabefiraisana JL, Lazar N, Li de la Sierra-Gallay I, Ochsenbein F, Valerio-Lepiniec M, Urvoas A, Minard P, Mijakovic I, Nessler S. Structural Analysis of the Hanks-Type Protein Kinase YabT From Bacillus subtilis Provides New Insights in its DNA-Dependent Activation. Front Microbiol 2019; 9:3014. [PMID: 30671027 PMCID: PMC6333020 DOI: 10.3389/fmicb.2018.03014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/21/2018] [Indexed: 12/19/2022] Open
Abstract
YabT is a serine/threonine kinase of the Hanks family from Bacillus subtilis, which lacks the canonical extracellular signal receptor domain but is anchored to the membrane through a C-terminal transmembrane helix. A previous study demonstrated that a basic juxtamembrane region corresponds to a DNA-binding motif essential for the activation of YabT trans-autophosphorylation. YabT is expressed during spore development and localizes to the asymmetric septum where it specifically phosphorylates essential proteins involved in genome maintenance, such as RecA, SsbA, and YabA. YabT has also been shown to phosphorylate proteins involved in protein synthesis, such as AbrB and Ef-Tu, suggesting a possible regulatory role in the progressive metabolic quiescence of the forespore. Finally, cross phosphorylations with other protein kinases implicate YabT in the regulation of numerous other cellular processes. Using an artificial protein scaffold as crystallization helper, we determined the first crystal structure of this DNA-dependent bacterial protein kinase. This allowed us to trap the active conformation of the kinase domain of YabT. Using NMR, we showed that the basic juxtamembrane region of YabT is disordered in the absence of DNA in solution, just like it is in the crystal, and that it is stabilized upon DNA binding. In comparison with its closest structural homolog, the mycobacterial kinase PknB allowed us to discuss the dimerization mode of YabT. Together with phosphorylation assays and DNA-binding experiments, this structural analysis helped us to gain new insights into the regulatory activation mechanism of YabT.
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Affiliation(s)
- Lei Shi
- Division of Systems and Synthetic Biology, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Andrea Cavagnino
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Jean-Luc Rabefiraisana
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Noureddine Lazar
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Inès Li de la Sierra-Gallay
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Françoise Ochsenbein
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Marie Valerio-Lepiniec
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Agathe Urvoas
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Philippe Minard
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Ivan Mijakovic
- Division of Systems and Synthetic Biology, Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Sylvie Nessler
- Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
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19
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Dimerization of the Trk receptors in the plasma membrane: effects of their cognate ligands. Biochem J 2018; 475:3669-3685. [PMID: 30366959 DOI: 10.1042/bcj20180637] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 10/23/2018] [Accepted: 10/26/2018] [Indexed: 12/18/2022]
Abstract
Receptor tyrosine kinases (RTKs) are cell surface receptors which control cell growth and differentiation, and play important roles in tumorigenesis. Despite decades of RTK research, the mechanism of RTK activation in response to their ligands is still under debate. Here, we investigate the interactions that control the activation of the tropomyosin receptor kinase (Trk) family of RTKs in the plasma membrane, using a FRET-based methodology. The Trk receptors are expressed in neuronal tissues, and guide the development of the central and peripheral nervous systems during development. We quantify the dimerization of human Trk-A, Trk-B, and Trk-C in the absence and presence of their cognate ligands: human β-nerve growth factor, human brain-derived neurotrophic factor, and human neurotrophin-3, respectively. We also assess conformational changes in the Trk dimers upon ligand binding. Our data support a model of Trk activation in which (1) Trks have a propensity to interact laterally and to form dimers even in the absence of ligand, (2) different Trk unliganded dimers have different stabilities, (3) ligand binding leads to Trk dimer stabilization, and (4) ligand binding induces structural changes in the Trk dimers which propagate to their transmembrane and intracellular domains. This model, which we call the 'transition model of RTK activation,' may hold true for many other RTKs.
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20
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Nordzieke DE, Medraño-Fernandez I. The Plasma Membrane: A Platform for Intra- and Intercellular Redox Signaling. Antioxidants (Basel) 2018; 7:antiox7110168. [PMID: 30463362 PMCID: PMC6262572 DOI: 10.3390/antiox7110168] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/15/2018] [Accepted: 11/17/2018] [Indexed: 02/06/2023] Open
Abstract
Membranes are of outmost importance to allow for specific signal transduction due to their ability to localize, amplify, and direct signals. However, due to the double-edged nature of reactive oxygen species (ROS)—toxic at high concentrations but essential signal molecules—subcellular localization of ROS-producing systems to the plasma membrane has been traditionally regarded as a protective strategy to defend cells from unwanted side-effects. Nevertheless, specialized regions, such as lipid rafts and caveolae, house and regulate the activated/inhibited states of important ROS-producing systems and concentrate redox targets, demonstrating that plasma membrane functions may go beyond acting as a securing lipid barrier. This is nicely evinced by nicotinamide adenine dinucleotide phosphate (NADPH)-oxidases (NOX), enzymes whose primary function is to generate ROS and which have been shown to reside in specific lipid compartments. In addition, membrane-inserted bidirectional H2O2-transporters modulate their conductance precisely during the passage of the molecules through the lipid bilayer, ensuring time-scaled delivery of the signal. This review aims to summarize current evidence supporting the role of the plasma membrane as an organizing center that serves as a platform for redox signal transmission, particularly NOX-driven, providing specificity at the same time that limits undesirable oxidative damage in case of malfunction. As an example of malfunction, we explore several pathological situations in which an inflammatory component is present, such as inflammatory bowel disease and neurodegenerative disorders, to illustrate how dysregulation of plasma-membrane-localized redox signaling impacts normal cell physiology.
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Affiliation(s)
- Daniela E Nordzieke
- Institute of Microbiology and Genetics, Department of Genetics of Eukaryotic Microorganisms, Georg August University Göttingen, Grisebachstr. 8, D-37077 Göttingen, Germany.
| | - Iria Medraño-Fernandez
- Protein Transport and Secretion Unit, Division of Genetics and Cell Biology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale San Raffaele, Università Vita-Salute San Raffaele, 20132 Milan, Italy.
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21
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Bocharov EV, Lesovoy DM, Bocharova OV, Urban AS, Pavlov KV, Volynsky PE, Efremov RG, Arseniev AS. Structural basis of the signal transduction via transmembrane domain of the human growth hormone receptor. Biochim Biophys Acta Gen Subj 2018; 1862:1410-1420. [DOI: 10.1016/j.bbagen.2018.03.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 03/13/2018] [Accepted: 03/19/2018] [Indexed: 12/18/2022]
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22
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Ventrella R, Kaplan N, Hoover P, Perez White BE, Lavker RM, Getsios S. EphA2 Transmembrane Domain Is Uniquely Required for Keratinocyte Migration by Regulating Ephrin-A1 Levels. J Invest Dermatol 2018; 138:2133-2143. [PMID: 29705292 DOI: 10.1016/j.jid.2018.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 12/19/2022]
Abstract
EphA2 receptor tyrosine kinase is activated by ephrin-A1 ligand, which harbors a glycosylphosphatidylinositol anchor that enhances lipid raft localization. Although EphA2 and ephrin-A1 modulate keratinocyte migration and differentiation, the ability of this cell-cell communication complex to localize to different membrane regions in keratinocytes remains unknown. Using a combination of biochemical and imaging approaches, we provide evidence that ephrin-A1 and a ligand-activated form of EphA2 partition outside of lipid raft domains in response to calcium-mediated cell-cell contact stabilization in normal human epidermal keratinocytes. EphA2 transmembrane domain swapping with a shorter and molecularly distinct transmembrane domain of EphA1 resulted in decreased localization of this receptor tyrosine kinase at cell-cell junctions and increased expression of ephrin-A1, which is a negative regulator of keratinocyte migration. Accordingly, altered EphA2 membrane distribution at cell-cell contacts limited the ability of keratinocytes to seal linear scratch wounds in vitro in an ephrin-A1-dependent manner. Collectively, these studies highlight a key role for the EphA2 transmembrane domain in receptor-ligand membrane distribution at cell-cell contacts that modulates ephrin-A1 levels to allow for efficient keratinocyte migration with relevance for cutaneous wound healing.
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Affiliation(s)
- Rosa Ventrella
- Department of Dermatology, 303 East Chicago Avenue, Ward 9, Northwestern University, Chicago, Illinois, USA
| | - Nihal Kaplan
- Department of Dermatology, 303 East Chicago Avenue, Ward 9, Northwestern University, Chicago, Illinois, USA
| | - Paul Hoover
- Department of Dermatology, 303 East Chicago Avenue, Ward 9, Northwestern University, Chicago, Illinois, USA
| | - Bethany E Perez White
- Department of Dermatology, 303 East Chicago Avenue, Ward 9, Northwestern University, Chicago, Illinois, USA
| | - Robert M Lavker
- Department of Dermatology, 303 East Chicago Avenue, Ward 9, Northwestern University, Chicago, Illinois, USA
| | - Spiro Getsios
- Department of Dermatology, 303 East Chicago Avenue, Ward 9, Northwestern University, Chicago, Illinois, USA.
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23
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Evolution and adaptation of single-pass transmembrane proteins. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:364-377. [DOI: 10.1016/j.bbamem.2017.11.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/29/2017] [Accepted: 11/07/2017] [Indexed: 12/19/2022]
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24
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Gushchin I, Gordeliy V. Transmembrane Signal Transduction in Two-Component Systems: Piston, Scissoring, or Helical Rotation? Bioessays 2017; 40. [PMID: 29280502 DOI: 10.1002/bies.201700197] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 11/30/2017] [Indexed: 11/10/2022]
Abstract
Allosteric and transmembrane (TM) signaling are among the major questions of structural biology. Here, we review and discuss signal transduction in four-helical TM bundles, focusing on histidine kinases and chemoreceptors found in two-component systems. Previously, piston, scissors, and helical rotation have been proposed as the mechanisms of TM signaling. We discuss theoretically possible conformational changes and examine the available experimental data, including the recent crystallographic structures of nitrate/nitrite sensor histidine kinase NarQ and phototaxis system NpSRII:NpHtrII. We show that TM helices can flex at multiple points and argue that the various conformational changes are not mutually exclusive, and often are observed concomitantly, throughout the TM domain or in its part. The piston and scissoring motions are the most prominent motions in the structures, but more research is needed for definitive conclusions.
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Affiliation(s)
- Ivan Gushchin
- Moscow Institute of Physics and Technology, 141700, Dolgoprudniy, Russia
| | - Valentin Gordeliy
- Moscow Institute of Physics and Technology, 141700, Dolgoprudniy, Russia.,Université Grenoble Alpes, CEA, CNRS, IBS, F-38000, Grenoble, France.,Institute of Complex Systems (ICS), ICS-6: Structural Biochemistry, Research Centre Jülich, 52425, Jülich, Germany
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25
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Activation of the EGF Receptor by Ligand Binding and Oncogenic Mutations: The "Rotation Model". Cells 2017; 6:cells6020013. [PMID: 28574446 PMCID: PMC5492017 DOI: 10.3390/cells6020013] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 05/17/2017] [Accepted: 05/31/2017] [Indexed: 01/17/2023] Open
Abstract
The epidermal growth factor receptor (EGFR) plays vital roles in cellular processes including cell proliferation, survival, motility, and differentiation. The dysregulated activation of the receptor is often implicated in human cancers. EGFR is synthesized as a single-pass transmembrane protein, which consists of an extracellular ligand-binding domain and an intracellular kinase domain separated by a single transmembrane domain. The receptor is activated by a variety of polypeptide ligands such as epidermal growth factor and transforming growth factor α. It has long been thought that EGFR is activated by ligand-induced dimerization of the receptor monomer, which brings intracellular kinase domains into close proximity for trans-autophosphorylation. An increasing number of diverse studies, however, demonstrate that EGFR is present as a pre-formed, yet inactive, dimer prior to ligand binding. Furthermore, recent progress in structural studies has provided insight into conformational changes during the activation of a pre-formed EGFR dimer. Upon ligand binding to the extracellular domain of EGFR, its transmembrane domains rotate or twist parallel to the plane of the cell membrane, resulting in the reorientation of the intracellular kinase domain dimer from a symmetric inactive configuration to an asymmetric active form (the “rotation model”). This model is also able to explain how oncogenic mutations activate the receptor in the absence of the ligand, without assuming that the mutations induce receptor dimerization. In this review, we discuss the mechanisms underlying the ligand-induced activation of the preformed EGFR dimer, as well as how oncogenic mutations constitutively activate the receptor dimer, based on the rotation model.
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26
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Bocharov EV, Bragin PE, Pavlov KV, Bocharova OV, Mineev KS, Polyansky AA, Volynsky PE, Efremov RG, Arseniev AS. The Conformation of the Epidermal Growth Factor Receptor Transmembrane Domain Dimer Dynamically Adapts to the Local Membrane Environment. Biochemistry 2017; 56:1697-1705. [DOI: 10.1021/acs.biochem.6b01085] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eduard V. Bocharov
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
| | - Pavel E. Bragin
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
| | - Konstantin V. Pavlov
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
| | - Olga V. Bocharova
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
| | - Konstantin S. Mineev
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
| | - Anton A. Polyansky
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
- Department of Structural and Computational
Biology, Max F. Perutz Laboratories, University of Vienna, Campus Vienna
Biocenter 5, Vienna AT-1030, Austria
| | - Pavel E. Volynsky
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
| | - Roman G. Efremov
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
- Higher School of Economics, Myasnitskaya ul. 20, Moscow 101000, Russian Federation
| | - Alexander S. Arseniev
- Department of Structural Biology, Shemyakin−Ovchinnikov Institute of Bioorganic Chemistry RAS, str. Miklukho-Maklaya 16/10, Moscow 117997, Russian Federation
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