1
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Hanashima S, Mito K, Umegawa Y, Murata M, Hojo H. Lipid chain-driven interaction of a lipidated Src-family kinase Lyn with the bilayer membrane. Org Biomol Chem 2022; 20:6436-6444. [PMID: 35880995 DOI: 10.1039/d2ob01079h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-Myristoylation is a process of ubiquitous protein modification, which promotes the interaction of lipidated proteins on cell surfaces, in conjunction with reversible S-palmitoylation. We report the cooperative lipid-lipid interaction of two acyl chains of proteins, which increases the protein-membrane interaction and facilitates selective targeting of membranes containing anionic lipids. Lyn is a member of the Src family kinases distributed on the membrane surface by N-myristoyl and neighbouring S-palmitoyl chain anchors at the unique N-terminus domain. We prepared N-terminal short segments of lipidated Lyn to investigate the behaviour of each acyl chain in the lipid composition-dependent membrane interaction by solid-state nuclear magnetic resonance (NMR) analysis. Solid-state 31P-NMR studies revealed that S-palmitoylation of N-myristoylated Lyn peptides increased the interaction between peptides and phospholipid head groups, particularly with the anionic phosphatidylserine-containing bilayers. The solid-state 2H-NMR of Lyn peptides with a perdeutero N-myristoyl chain indicated an increase (0.6-0.8 Å) in the extent of the N-myristoyl chain in the presence of nearby S-palmitoyl chains, probably through the interaction via the acyl chains. The cooperative hydrocarbon chain interaction of the two acyl chains of Lyn increased membrane binding by extending the hydrocarbon chains deeper into the membrane interior, thereby promoting the peptide-membrane surface interaction between the cationic peptide side chains and the anionic lipid head groups. This lipid-driven mechanism by S-palmitoylation promotes the partition of the lipidated proteins to the cytoplasmic surface of the cell membranes and may be involved in recruiting Lyn at the signalling domains rich in anionic lipids.
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Affiliation(s)
- Shinya Hanashima
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
| | - Kanako Mito
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
| | - Yuichi Umegawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan. .,Forefront Research Center, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Hironobu Hojo
- Forefront Research Center, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.,Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita 565-0871, Japan
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2
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Hanashima S, Ikeda R, Matsubara Y, Yasuda T, Tsuchikawa H, Slotte JP, Murata M. Effect of cholesterol on the lactosylceramide domains in phospholipid bilayers. Biophys J 2022; 121:1143-1155. [PMID: 35218738 PMCID: PMC9034317 DOI: 10.1016/j.bpj.2022.02.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/22/2021] [Accepted: 02/22/2022] [Indexed: 11/02/2022] Open
Abstract
Lactosylceramide (LacCer) in the plasma membranes of immune cells is an important lipid for signaling in innate immunity through the formation of LacCer-rich domains together with cholesterol (Cho). However, the properties of the LacCer domains formed in multicomponent membranes remain unclear. In this study, we examined the properties of the LacCer domains formed in Cho containing 1-palmitoyl-2-oleoyl phosphatidylcholine (POPC) membranes by deuterium solid-state NMR and fluorescence lifetimes. The potent affinity of LacCer-LacCer (homophilic interaction) is known to induce a thermally stable gel phase in the unitary LacCer bilayer. In LacCer/Cho binary membranes, Cho gradually destabilized the LacCer gel phase to form the liquid-ordered (Lo) phase by its potent order effect. In the LacCer/POPC binary systems without Cho, the 2H NMR spectra of 10',10'-d2-LacCer and 18',18',18'-d3-LacCer probes revealed that LacCer was poorly miscible with POPC in the membranes and formed stable gel phases without being distributed in the liquid crystalline (Ld) domain. The lamellar structure of the LacCer/POPC membrane was gradually disrupted at around 60 °C, while the addition of Cho increased the thermal stability of the lamellarity. Furthermore, the area of the LacCer gel phase and its chain order were decreased in the LacCer/POPC/Cho ternary membranes, while the Lo domain, which was observed in the LacCer/Cho binary membrane, was not observed. Cho surrounding the LacCer gel domain liberated LacCer and facilitated forming the submicron- to nano-scale small domains in the Ld domain of the LacCer/POPC/Cho membranes, as revealed by the fluorescence lifetimes of trans-parinaric acid (tPA) and tPA-LacCer. Our findings on the membrane properties of the LacCer domains, particularly in the presence of Cho, would help elucidate the properties of the LacCer domains in biological membranes.
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Affiliation(s)
- Shinya Hanashima
- Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan.
| | - Ryuji Ikeda
- Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan
| | - Yuki Matsubara
- Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan
| | - Tomokazu Yasuda
- Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan
| | - Hiroshi Tsuchikawa
- Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan
| | - J Peter Slotte
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Tykistökatu 6 A, FIN 20520 Turku, Finland
| | - Michio Murata
- Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan; JST ERATO, Lipid Active Structure Project, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan
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3
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Zielińska A, Savietto A, de Sousa Borges A, Martinez D, Berbon M, Roelofsen JR, Hartman AM, de Boer R, Van der Klei IJ, Hirsch AKH, Habenstein B, Bramkamp M, Scheffers DJ. Flotillin-mediated membrane fluidity controls peptidoglycan synthesis and MreB movement. eLife 2020; 9:e57179. [PMID: 32662773 PMCID: PMC7360373 DOI: 10.7554/elife.57179] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/12/2020] [Indexed: 01/07/2023] Open
Abstract
The bacterial plasma membrane is an important cellular compartment. In recent years it has become obvious that protein complexes and lipids are not uniformly distributed within membranes. Current hypotheses suggest that flotillin proteins are required for the formation of complexes of membrane proteins including cell-wall synthetic proteins. We show here that bacterial flotillins are important factors for membrane fluidity homeostasis. Loss of flotillins leads to a decrease in membrane fluidity that in turn leads to alterations in MreB dynamics and, as a consequence, in peptidoglycan synthesis. These alterations are reverted when membrane fluidity is restored by a chemical fluidizer. In vitro, the addition of a flotillin increases membrane fluidity of liposomes. Our data support a model in which flotillins are required for direct control of membrane fluidity rather than for the formation of protein complexes via direct protein-protein interactions.
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Affiliation(s)
- Aleksandra Zielińska
- Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of GroningenGroningenNetherlands
| | - Abigail Savietto
- Biozentrum, Ludwig-Maximilians-Universität MünchenMünchenGermany
- Institute for General Microbiology, Christian-Albrechts-UniversityKielGermany
| | - Anabela de Sousa Borges
- Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of GroningenGroningenNetherlands
| | - Denis Martinez
- Institute of Chemistry & Biology of Membranes & Nanoobjects (UMR5248 CBMN), IECB, CNRS, Université Bordeaux, Institut Polytechnique BordeauxPessacFrance
| | - Melanie Berbon
- Institute of Chemistry & Biology of Membranes & Nanoobjects (UMR5248 CBMN), IECB, CNRS, Université Bordeaux, Institut Polytechnique BordeauxPessacFrance
| | - Joël R Roelofsen
- Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of GroningenGroningenNetherlands
| | - Alwin M Hartman
- Department of Drug Design and Optimization (DDOP), Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI)SaarbrückenGermany
- Department of Pharmacy, Saarland UniversitySaarbrückenGermany
- Stratingh Institute for Chemistry, University of GroningenGroningenNetherlands
| | - Rinse de Boer
- Molecular Cell Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of GroningenGroningenNetherlands
| | - Ida J Van der Klei
- Molecular Cell Biology, Groningen Biomolecular Sciences and Biotechnology Institute, University of GroningenGroningenNetherlands
| | - Anna KH Hirsch
- Department of Drug Design and Optimization (DDOP), Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI)SaarbrückenGermany
- Department of Pharmacy, Saarland UniversitySaarbrückenGermany
- Stratingh Institute for Chemistry, University of GroningenGroningenNetherlands
| | - Birgit Habenstein
- Institute of Chemistry & Biology of Membranes & Nanoobjects (UMR5248 CBMN), IECB, CNRS, Université Bordeaux, Institut Polytechnique BordeauxPessacFrance
| | - Marc Bramkamp
- Biozentrum, Ludwig-Maximilians-Universität MünchenMünchenGermany
- Institute for General Microbiology, Christian-Albrechts-UniversityKielGermany
| | - Dirk-Jan Scheffers
- Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of GroningenGroningenNetherlands
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4
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Le Roux AL, Mohammad IL, Mateos B, Arbesú M, Gairí M, Khan FA, Teixeira JMC, Pons M. A Myristoyl-Binding Site in the SH3 Domain Modulates c-Src Membrane Anchoring. iScience 2019; 12:194-203. [PMID: 30690395 PMCID: PMC6354742 DOI: 10.1016/j.isci.2019.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/04/2018] [Accepted: 01/04/2019] [Indexed: 12/25/2022] Open
Abstract
The c-Src oncogene is anchored to the cytoplasmic membrane through its N-terminal myristoylated SH4 domain. This domain is part of an intramolecular fuzzy complex with the SH3 and Unique domains. Here we show that the N-terminal myristoyl group binds to the SH3 domain in the proximity of the RT loop, when Src is not anchored to a lipid membrane. Residues in the so-called Unique Lipid Binding Region modulate this interaction. In the presence of lipids, the myristoyl group is released from the SH3 domain and inserts into the lipid membrane. The fuzzy complex with the SH4 and Unique domains is retained in the membrane-bound form, placing the SH3 domain close to the membrane surface and restricting its orientation. The apparent affinity of myristoylated proteins containing the SH4, Unique, and SH3 domains is modulated by these intramolecular interactions, suggesting a mechanism linking c-Src activation and membrane anchoring.
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Affiliation(s)
- Anabel-Lise Le Roux
- BioNMR Laboratory, Inorganic and Organic Chemistry Department, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain
| | - Irrem-Laareb Mohammad
- BioNMR Laboratory, Inorganic and Organic Chemistry Department, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain
| | - Borja Mateos
- BioNMR Laboratory, Inorganic and Organic Chemistry Department, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain
| | - Miguel Arbesú
- BioNMR Laboratory, Inorganic and Organic Chemistry Department, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain
| | - Margarida Gairí
- NMR Facility, Scientific and Technological Centers, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain
| | - Farman Ali Khan
- BioNMR Laboratory, Inorganic and Organic Chemistry Department, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain; Department of Biochemistry, Abdul Wali Khan University, Mardan 23200, Pakistan
| | - João M C Teixeira
- BioNMR Laboratory, Inorganic and Organic Chemistry Department, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain
| | - Miquel Pons
- BioNMR Laboratory, Inorganic and Organic Chemistry Department, Universitat de Barcelona, Baldiri Reixac, 10-12, 08028 Barcelona, Spain.
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5
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Molugu TR, Brown MF. Cholesterol Effects on the Physical Properties of Lipid Membranes Viewed by Solid-state NMR Spectroscopy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1115:99-133. [PMID: 30649757 DOI: 10.1007/978-3-030-04278-3_5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this chapter, we review the physical properties of lipid/cholesterol mixtures involving studies of model membranes using solid-state NMR spectroscopy. The approach allows one to quantify the average membrane structure, fluctuations, and elastic deformation upon cholesterol interaction. Emphasis is placed on understanding the membrane structural deformation and emergent fluctuations at an atomistic level. Lineshape measurements using solid-state NMR spectroscopy give equilibrium structural properties, while relaxation time measurements study the molecular dynamics over a wide timescale range. The equilibrium properties of glycerophospholipids, sphingolipids, and their binary and tertiary mixtures with cholesterol are accessible. Nonideal mixing of cholesterol with other lipids explains the occurrence of liquid-ordered domains. The entropic loss upon addition of cholesterol to sphingolipids is less than for glycerophospholipids, and may drive formation of lipid rafts. The functional dependence of 2H NMR spin-lattice relaxation (R 1Z) rates on segmental order parameters (S CD) for lipid membranes is indicative of emergent viscoelastic properties. Addition of cholesterol shows stiffening of the bilayer relative to the pure lipids and this effect is diminished for lanosterol. Opposite influences of cholesterol and detergents on collective dynamics and elasticity at an atomistic scale can potentially affect lipid raft formation in cellular membranes.
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Affiliation(s)
- Trivikram R Molugu
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA
| | - Michael F Brown
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA. .,Department of Physics, University of Arizona, Tucson, AZ, USA.
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6
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Erwin N, Dwivedi M, Mejuch T, Waldmann H, Winter R. UNC119A Decreases the Membrane Binding of Myristoylated c-Src. Chembiochem 2018; 19:1482-1487. [PMID: 29700916 DOI: 10.1002/cbic.201800158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Indexed: 12/26/2022]
Abstract
Plasma membrane localization of myristoylated c-Src, a proto-oncogene protein-tyrosine kinase, is required for its signaling activity. Recent studies proposed that UNC119 protein functions as a solubilizing factor for myristoylated proteins, thereby regulating their subcellular distribution and signaling. The underlying molecular mechanism by which UNC119 regulates the membrane binding of c-Src has remained elusive. By combining different biophysical techniques, we have found that binding of a myristoylated c-Src-derived N-terminal peptide (Myr-Src) by UNC119A results in a reduced membrane binding affinity of the peptide, due to the competition of binding to membranes. The dissociation of Myr-Src from membranes is facilitated in the presence of UNC119A, as a consequence of which the clustering propensity of this peptide on the membrane is partially impaired. By these means, UNC119A is able to regulate c-Src spatially in the cytoplasm and on cellular membranes, and this has important implications for its cellular signaling.
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Affiliation(s)
- Nelli Erwin
- Physical Chemistry I, Biophysical Chemistry, Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
| | - Mridula Dwivedi
- Physical Chemistry I, Biophysical Chemistry, Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
| | - Tom Mejuch
- Department of Chemical Biology, Max-Plank-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Herbert Waldmann
- Department of Chemical Biology, Max-Plank-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Roland Winter
- Physical Chemistry I, Biophysical Chemistry, Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
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7
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Atsmon-Raz Y, Tieleman DP. Parameterization of Palmitoylated Cysteine, Farnesylated Cysteine, Geranylgeranylated Cysteine, and Myristoylated Glycine for the Martini Force Field. J Phys Chem B 2017; 121:11132-11143. [PMID: 29144135 DOI: 10.1021/acs.jpcb.7b10175] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Peripheral membrane proteins go through various post-translational modifications that covalently bind fatty acid tails to specific amino acids. These post-translational modifications significantly alter the lipophilicity of the modified proteins and allow them to anchor to biological membranes. Over 1000 different proteins have been identified to date that require such membrane-protein interactions to carry out their biological functions, including members of the Src and Ras superfamilies that play key roles in cell signaling and carcinogenesis. We have used all-atom simulations with the CHARMM36 force field to parameterize four of the most common post-translational modifications for the Martini 2.2 force field: palmitoylated cysteine, farnesylated cysteine, geranylgeranylated cysteine, and myristoylated glycine. The parameters reproduce the key features of clusters of configurations of the different anchors in lipid membranes as well as the water-octanol partitioning free energies of the anchors, which are crucial for the correct reproduction of the expected biophysical behavior of peripheral membrane proteins at the membrane-water interface. Implementation in existing Martini setup tools facilitates the use of the new parameters.
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Affiliation(s)
- Yoav Atsmon-Raz
- Department of Biological Sciences, Centre for Molecular Simulation, University of Calgary , 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
| | - D Peter Tieleman
- Department of Biological Sciences, Centre for Molecular Simulation, University of Calgary , 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
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8
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Gulyás G, Radvánszki G, Matuska R, Balla A, Hunyady L, Balla T, Várnai P. Plasma membrane phosphatidylinositol 4-phosphate and 4,5-bisphosphate determine the distribution and function of K-Ras4B but not H-Ras proteins. J Biol Chem 2017; 292:18862-18877. [PMID: 28939768 DOI: 10.1074/jbc.m117.806679] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/11/2017] [Indexed: 11/06/2022] Open
Abstract
Plasma membrane (PM) localization of Ras proteins is crucial for transmitting signals upon mitogen stimulation. Post-translational lipid modification of Ras proteins plays an important role in their recruitment to the PM. Electrostatic interactions between negatively charged PM phospholipids and basic amino acids found in K-Ras4B (K-Ras) but not in H-Ras are important for permanent K-Ras localization to the PM. Here, we investigated how acute depletion of negatively charged PM polyphosphoinositides (PPIns) from the PM alters the intracellular distribution and activity of K- and H-Ras proteins. PPIns depletion from the PM was achieved either by agonist-induced activation of phospholipase C β or with a rapamycin-inducible system in which various phosphatidylinositol phosphatases were recruited to the PM. Redistribution of the two Ras proteins was monitored with confocal microscopy or with a recently developed bioluminescence resonance energy transfer-based approach involving fusion of the Ras C-terminal targeting sequences or the entire Ras proteins to Venus fluorescent protein. We found that PM PPIns depletion caused rapid translocation of K-Ras but not H-Ras from the PM to the Golgi. PM depletion of either phosphatidylinositol 4-phosphate (PtdIns4P) or PtdIns(4,5)P2 but not PtdIns(3,4,5)P3 was sufficient to evoke K-Ras translocation. This effect was diminished by deltarasin, an inhibitor of the Ras-phosphodiesterase interaction, or by simultaneous depletion of the Golgi PtdIns4P. The PPIns depletion decreased incorporation of [3H]leucine in K-Ras-expressing cells, suggesting that Golgi-localized K-Ras is not as signaling-competent as its PM-bound form. We conclude that PPIns in the PM are important regulators of K-Ras-mediated signals.
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Affiliation(s)
- Gergő Gulyás
- From the Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest 1094, Hungary
| | - Glória Radvánszki
- From the Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest 1094, Hungary
| | - Rita Matuska
- From the Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest 1094, Hungary
| | - András Balla
- From the Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest 1094, Hungary.,MTA-SE Laboratory of Molecular Physiology, Hungarian Academy of Sciences and Semmelweis University, Budapest 1094, Hungary, and
| | - László Hunyady
- From the Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest 1094, Hungary.,MTA-SE Laboratory of Molecular Physiology, Hungarian Academy of Sciences and Semmelweis University, Budapest 1094, Hungary, and
| | - Tamas Balla
- Section on Molecular Signal Transduction, Eunice Kennedy Shriver NICHD, National Institutes of Health, Bethesda, Maryland 20892
| | - Péter Várnai
- From the Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest 1094, Hungary,
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9
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Molugu TR, Lee S, Brown MF. Concepts and Methods of Solid-State NMR Spectroscopy Applied to Biomembranes. Chem Rev 2017; 117:12087-12132. [PMID: 28906107 DOI: 10.1021/acs.chemrev.6b00619] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Concepts of solid-state NMR spectroscopy and applications to fluid membranes are reviewed in this paper. Membrane lipids with 2H-labeled acyl chains or polar head groups are studied using 2H NMR to yield knowledge of their atomistic structures in relation to equilibrium properties. This review demonstrates the principles and applications of solid-state NMR by unifying dipolar and quadrupolar interactions and highlights the unique features offered by solid-state 2H NMR with experimental illustrations. For randomly oriented multilamellar lipids or aligned membranes, solid-state 2H NMR enables direct measurement of residual quadrupolar couplings (RQCs) due to individual C-2H-labeled segments. The distribution of RQC values gives nearly complete profiles of the segmental order parameters SCD(i) as a function of acyl segment position (i). Alternatively, one can measure residual dipolar couplings (RDCs) for natural abundance lipid samples to obtain segmental SCH order parameters. A theoretical mean-torque model provides acyl-packing profiles representing the cumulative chain extension along the normal to the aqueous interface. Equilibrium structural properties of fluid bilayers and various thermodynamic quantities can then be calculated, which describe the interactions with cholesterol, detergents, peptides, and integral membrane proteins and formation of lipid rafts. One can also obtain direct information for membrane-bound peptides or proteins by measuring RDCs using magic-angle spinning (MAS) in combination with dipolar recoupling methods. Solid-state NMR methods have been extensively applied to characterize model membranes and membrane-bound peptides and proteins, giving unique information on their conformations, orientations, and interactions in the natural liquid-crystalline state.
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Affiliation(s)
- Trivikram R Molugu
- Department of Chemistry & Biochemistry and ‡Department of Physics, University of Arizona , Tucson, Arizona 85721, United States
| | - Soohyun Lee
- Department of Chemistry & Biochemistry and ‡Department of Physics, University of Arizona , Tucson, Arizona 85721, United States
| | - Michael F Brown
- Department of Chemistry & Biochemistry and ‡Department of Physics, University of Arizona , Tucson, Arizona 85721, United States
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10
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Dwivedi M, Mejuch T, Waldmann H, Winter R. Lateral Organization of Host Heterogeneous Raft-like Membranes Altered by the Myristoyl Modification of Tyrosine Kinase c-Src. Angew Chem Int Ed Engl 2017; 56:10511-10515. [DOI: 10.1002/anie.201706233] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Mridula Dwivedi
- Department of Chemistry and Chemical Biology, Physical Chemistry; Technical University of Dortmund; Otto-Hahn-Str.4a 44221 Dortmund Germany
| | - Tom Mejuch
- Department of Chemistry and Chemical Biology; Max-Planck-Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Herbert Waldmann
- Department of Chemistry and Chemical Biology; Max-Planck-Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Roland Winter
- Department of Chemistry and Chemical Biology, Physical Chemistry; Technical University of Dortmund; Otto-Hahn-Str.4a 44221 Dortmund Germany
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11
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Dwivedi M, Mejuch T, Waldmann H, Winter R. Lateral Organization of Host Heterogeneous Raft-like Membranes Altered by the Myristoyl Modification of Tyrosine Kinase c-Src. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706233] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Mridula Dwivedi
- Department of Chemistry and Chemical Biology, Physical Chemistry; Technical University of Dortmund; Otto-Hahn-Str.4a 44221 Dortmund Germany
| | - Tom Mejuch
- Department of Chemistry and Chemical Biology; Max-Planck-Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Herbert Waldmann
- Department of Chemistry and Chemical Biology; Max-Planck-Institute of Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Roland Winter
- Department of Chemistry and Chemical Biology, Physical Chemistry; Technical University of Dortmund; Otto-Hahn-Str.4a 44221 Dortmund Germany
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12
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Scheidt HA, Klingler J, Huster D, Keller S. Structural Thermodynamics of myr-Src(2-19) Binding to Phospholipid Membranes. Biophys J 2016; 109:586-94. [PMID: 26244740 DOI: 10.1016/j.bpj.2015.06.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 06/24/2015] [Accepted: 06/24/2015] [Indexed: 12/19/2022] Open
Abstract
Many proteins are anchored to lipid bilayer membranes through a combination of hydrophobic and electrostatic interactions. In the case of the membrane-bound nonreceptor tyrosine kinase Src from Rous sarcoma virus, these interactions are mediated by an N-terminal myristoyl chain and an adjacent cluster of six basic amino-acid residues, respectively. In contrast with the acyl modifications of other lipid-anchored proteins, the myristoyl chain of Src does not match the host lipid bilayer in terms of chain conformation and dynamics, which is attributed to a tradeoff between hydrophobic burial of the myristoyl chain and repulsion of the peptidic moiety from the phospholipid headgroup region. Here, we combine thermodynamic information obtained from isothermal titration calorimetry with structural data derived from (2)H, (13)C, and (31)P solid-state nuclear magnetic resonance spectroscopy to decipher the hydrophobic and electrostatic contributions governing the interactions of a myristoylated Src peptide with zwitterionic and anionic membranes made from lauroyl (C12:0) or myristoyl (C14:0) lipids. Although the latter are expected to enable better hydrophobic matching, the Src peptide partitions more avidly into the shorter-chain lipid analog because this does not require the myristoyl chain to stretch extensively to avoid unfavorable peptide/headgroup interactions. Moreover, we find that Coulombic and intrinsic contributions to membrane binding are not additive, because the presence of anionic lipids enhances membrane binding more strongly than would be expected on the basis of simple Coulombic attraction.
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Affiliation(s)
- Holger A Scheidt
- Institut für Medizinische Physik und Biophysik, Universität Leipzig, Leipzig, Germany
| | - Johannes Klingler
- Molecular Biophysics, University of Kaiserslautern, Kaiserslautern, Germany
| | - Daniel Huster
- Institut für Medizinische Physik und Biophysik, Universität Leipzig, Leipzig, Germany
| | - Sandro Keller
- Molecular Biophysics, University of Kaiserslautern, Kaiserslautern, Germany.
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Molugu TR, Brown MF. Cholesterol-induced suppression of membrane elastic fluctuations at the atomistic level. Chem Phys Lipids 2016; 199:39-51. [PMID: 27154600 DOI: 10.1016/j.chemphyslip.2016.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 04/29/2016] [Accepted: 05/02/2016] [Indexed: 12/14/2022]
Abstract
Applications of solid-state NMR spectroscopy for investigating the influences of lipid-cholesterol interactions on membrane fluctuations are reviewed in this paper. Emphasis is placed on understanding the energy landscapes and fluctuations at an emergent atomistic level. Solid-state (2)H NMR spectroscopy directly measures residual quadrupolar couplings (RQCs) due to individual C-(2)H labeled segments of the lipid molecules. Moreover, residual dipolar couplings (RDCs) of (13)C-(1)H bonds are obtained in separated local-field NMR spectroscopy. The distributions of RQC or RDC values give nearly complete profiles of the order parameters as a function of acyl segment position. Measured equilibrium properties of glycerophospholipids and sphingolipids including their binary and tertiary mixtures with cholesterol show unequal mixing associated with liquid-ordered domains. The entropic loss upon addition of cholesterol to sphingolipids is less than for glycerophospholipids and may drive the formation of lipid rafts. In addition relaxation time measurements enable one to study the molecular dynamics over a wide time-scale range. For (2)H NMR the experimental spin-lattice (R1Z) relaxation rates follow a theoretical square-law dependence on segmental order parameters (SCD) due to collective slow dynamics over mesoscopic length scales. The functional dependence for the liquid-crystalline lipid membranes is indicative of viscoelastic properties as they emerge from atomistic-level interactions. A striking decrease in square-law slope upon addition of cholesterol denotes stiffening relative to the pure lipid bilayers that is diminished in the case of lanosterol. Measured equilibrium properties and relaxation rates infer opposite influences of cholesterol and detergents on collective dynamics and elasticity at an atomistic scale that potentially affects lipid raft formation in cellular membranes.
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Affiliation(s)
- Trivikram R Molugu
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA
| | - Michael F Brown
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA; Department of Physics, University of Arizona, Tucson, AZ 85721, USA.
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14
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Le Roux AL, Castro B, Garbacik ET, Garcia Parajo MF, Pons M. Single molecule fluorescence reveals dimerization of myristoylated Src N-terminal region on supported lipid bilayers. ChemistrySelect 2016. [DOI: 10.1002/slct.201600117] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Anabel-Lise Le Roux
- Biomolecular NMR Laboratory; Organic Chemistry Department; University of Barcelona; Baldiri Reixac 10-12 08028 Barcelona Spain
- Institute for Research in Biomedicine (IRB-Barcelona); The Barcelona Institute of Science and Technology; Baldiri Reixac 10-12 08028 Barcelona Spain
| | - Bruno Castro
- ICFO- Institut de Ciencies Fotoniques; The Barcelona Institute of Science and Technology; 08860 Castelldefels (Barcelona) Spain
| | - Erik T. Garbacik
- ICFO- Institut de Ciencies Fotoniques; The Barcelona Institute of Science and Technology; 08860 Castelldefels (Barcelona) Spain
| | - Maria F. Garcia Parajo
- ICFO- Institut de Ciencies Fotoniques; The Barcelona Institute of Science and Technology; 08860 Castelldefels (Barcelona) Spain
- ICREA-Institució Catalana de Recerca i Estudis Avançats; 08010 Barcelona Spain
| | - Miquel Pons
- Biomolecular NMR Laboratory; Organic Chemistry Department; University of Barcelona; Baldiri Reixac 10-12 08028 Barcelona Spain
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15
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Charlier L, Louet M, Chaloin L, Fuchs P, Martinez J, Muriaux D, Favard C, Floquet N. Coarse-grained simulations of the HIV-1 matrix protein anchoring: revisiting its assembly on membrane domains. Biophys J 2014; 106:577-85. [PMID: 24507598 DOI: 10.1016/j.bpj.2013.12.019] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 11/21/2013] [Accepted: 12/06/2013] [Indexed: 11/25/2022] Open
Abstract
In the accepted model for human immunodeficiency virus preassembly in infected host cells, the anchoring to the intracellular leaflet of the membrane of the matrix domain (MA) that lies at the N-terminus of the viral Gag protein precursor appears to be one of the crucial steps for particle assembly. In this study, we simulated the membrane anchoring of human immunodeficiency virus-1 myristoylated MA protein using a coarse-grained representation of both the protein and the membrane. Our calculations first suggest that the myristoyl group could spontaneously release from its initial hydrophobic pocket before MA protein interacts with the lipid membrane. All-atom simulations confirmed this possibility with a related energy cost estimated to be ~5 kcal.mol(-1). The phosphatidylinositol (4,5) bisphosphate (PI(4,5)P2) head binds preferentially to the MA highly basic region as described in available NMR data, but interestingly without flipping of its 2' acyl chain into the MA protein. Moreover, MA was able to confine PI(4,5)P2 lipids all around its molecular surface after having found a stable orientation at the membrane surface. Our results suggest that this orientation is dependent on Myr anchoring and that this confinement induces a lateral segregation of PI(4,5)P2 in domains. This is consistent with a PI(4,5)P2 enrichment of the virus envelope as compared to the host cell membrane.
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Affiliation(s)
- Landry Charlier
- Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Université Montpellier 1, Université Montpellier 2, Faculté de Pharmacie, Montpellier cedex 05, France
| | - Maxime Louet
- Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Université Montpellier 1, Université Montpellier 2, Faculté de Pharmacie, Montpellier cedex 05, France
| | - Laurent Chaloin
- Centre d'études d'agents Pathogènes et Biotechnologies pour la Santé (CPBS) CNRS-UMR 5236, Université Montpellier 1 - Université Montpellier 2, Montpellier Cedex 5, France
| | - Patrick Fuchs
- Dynamique des Structures et Interactions des Macromolécules Biologiques INTS, INSERM UMR-S665, Université Paris Diderot, Alexandre Cabanel, Paris
| | - Jean Martinez
- Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Université Montpellier 1, Université Montpellier 2, Faculté de Pharmacie, Montpellier cedex 05, France
| | - Delphine Muriaux
- Centre d'études d'agents Pathogènes et Biotechnologies pour la Santé (CPBS) CNRS-UMR 5236, Université Montpellier 1 - Université Montpellier 2, Montpellier Cedex 5, France
| | - Cyril Favard
- Centre d'études d'agents Pathogènes et Biotechnologies pour la Santé (CPBS) CNRS-UMR 5236, Université Montpellier 1 - Université Montpellier 2, Montpellier Cedex 5, France.
| | - Nicolas Floquet
- Institut des Biomolécules Max Mousseron (IBMM), CNRS UMR5247, Université Montpellier 1, Université Montpellier 2, Faculté de Pharmacie, Montpellier cedex 05, France.
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16
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Huster D. Solid-state NMR spectroscopy to study protein-lipid interactions. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1841:1146-60. [PMID: 24333800 DOI: 10.1016/j.bbalip.2013.12.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 12/04/2013] [Indexed: 12/22/2022]
Abstract
The appropriate lipid environment is crucial for the proper function of membrane proteins. There is a tremendous variety of lipid molecules in the membrane and so far it is often unclear which component of the lipid matrix is essential for the function of a respective protein. Lipid molecules and proteins mutually influence each other; parameters such as acyl chain order, membrane thickness, membrane elasticity, permeability, lipid-domain and annulus formation are strongly modulated by proteins. More recent data also indicates that the influence of proteins goes beyond a single annulus of next-neighbor boundary lipids. Therefore, a mesoscopic approach to membrane lipid-protein interactions in terms of elastic membrane deformations has been developed. Solid-state NMR has greatly contributed to the understanding of lipid-protein interactions and the modern view of biological membranes. Methods that detect the influence of proteins on the membrane as well as direct lipid-protein interactions have been developed and are reviewed here. Examples for solid-state NMR studies on the interaction of Ras proteins, the antimicrobial peptide protegrin-1, the G protein-coupled receptor rhodopsin, and the K(+) channel KcsA are discussed. This article is part of a Special Issue entitled Tools to study lipid functions.
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Affiliation(s)
- Daniel Huster
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, D-04107 Leipzig, Germany.
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17
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Structure and dynamics of the two amphipathic arginine-rich peptides RW9 and RL9 in a lipid environment investigated by solid-state NMR and MD simulations. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:824-33. [DOI: 10.1016/j.bbamem.2012.11.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 11/09/2012] [Accepted: 11/12/2012] [Indexed: 02/06/2023]
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18
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Weise K, Huster D, Kapoor S, Triola G, Waldmann H, Winter R. Gibbs energy determinants of lipoprotein insertion into lipid membranes: the case study of Ras proteins. Faraday Discuss 2013; 161:549-61; discussion 563-89. [DOI: 10.1039/c2fd20100c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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19
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Olausson BES, Grossfield A, Pitman MC, Brown MF, Feller SE, Vogel A. Molecular dynamics simulations reveal specific interactions of post-translational palmitoyl modifications with rhodopsin in membranes. J Am Chem Soc 2012; 134:4324-31. [PMID: 22280374 DOI: 10.1021/ja2108382] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We present a detailed analysis of the behavior of the highly flexible post-translational lipid modifications of rhodopsin from multiple-microsecond all-atom molecular dynamics simulations. Rhodopsin was studied in a realistic membrane environment that includes cholesterol, as well as saturated and polyunsaturated lipids with phosphocholine and phosphoethanolamine headgroups. The simulation reveals striking differences between the palmitoylations at Cys322 and Cys323 as well as between the palmitoyl chains and the neighboring lipids. Notably the palmitoyl group at Cys322 shows considerably greater contact with helix H1 of rhodopsin, yielding frequent chain upturns with longer reorientational correlation times, and relatively low order parameters. While the palmitoylation at Cys323 makes fewer protein contacts and has increased order compared to Cys322, it nevertheless exhibits greater flexibility with smaller order parameters than the stearoyl chains of the surrounding lipids. The dynamical structure of the palmitoylations-as well as their extensive fluctuations-suggests a complex function for the post-translational modifications in rhodopsin and potentially other G protein-coupled receptors, going beyond their role as membrane anchoring elements. Rather, we propose that the palmitoylation at Cys323 has a potential role as a lipid anchor, whereas the palmitoyl-protein interaction observed for Cys322 suggests a more specific interaction that affects the stability of the dark state of rhodopsin.
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Affiliation(s)
- Bjoern E S Olausson
- Institute of Pharmacy, Martin-Luther-University Halle-Wittenberg, D-06120 Halle/Saale, Germany
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20
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Vogel A, Roark M, Feller SE. A reinterpretation of neutron scattering experiments on a lipidated Ras peptide using replica exchange molecular dynamics. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1818:219-24. [PMID: 21872568 DOI: 10.1016/j.bbamem.2011.08.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 08/10/2011] [Accepted: 08/11/2011] [Indexed: 11/27/2022]
Abstract
The Ras family of proteins plays crucial roles in a variety of cell signaling networks where they have the function of a molecular switch. Their particular medical relevance arises from mutations in these proteins that are implicated in ~30% of human cancers. The various Ras proteins exhibit a high degree of homology in their soluble domains but extremely high variability in the membrane anchoring regions that are crucial for protein function and are the focus of this study. We have employed replica exchange molecular dynamics computer simulations to study a doubly lipidated heptapeptide, corresponding to the C-terminus of the human N-Ras protein, incorporated into a dimyristoylphosphatidylcholine lipid bilayer. This same system has previously been investigated experimentally utilizing a number of techniques, including neutron scattering. Here we present results of well converged simulations that describe the subtle changes in scattering density in terms of the location of the peptide and its lipid modifications and in terms of changes in phospholipid density arising from the incorporation of the peptide into the membrane bilayer. The detailed picture that emerges from the combination of experimental and computational data exemplifies the power of combining isotopic substitution neutron scattering with atomistic molecular dynamics simulation. This article is part of a Special Issue entitled: Membrane protein structure and function.
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Affiliation(s)
- Alexander Vogel
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, D-04275 Leipzig, Germany
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21
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Penk A, Müller M, Scheidt HA, Langosch D, Huster D. Structure and dynamics of the lipid modifications of a transmembrane α-helical peptide determined by 2H solid-state NMR spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:784-91. [DOI: 10.1016/j.bbamem.2010.12.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 12/15/2010] [Accepted: 12/15/2010] [Indexed: 01/11/2023]
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22
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Monogioudi E, Permi P, Filpponen I, Lienemann M, Li B, Argyropoulos D, Buchert J, Mattinen ML. Protein analysis by 31p NMR spectroscopy in ionic liquid: quantitative determination of enzymatically created cross-links. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:1352-1362. [PMID: 21218836 DOI: 10.1021/jf102973d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Cross-linking of β-casein by Trichoderma reesei tyrosinase (TrTyr) and Streptoverticillium mobaraense transglutaminase (Tgase) was analyzed by (31)P nuclear magnetic resonance (NMR) spectroscopy in ionic liquid (IL). According to (31)P NMR, 91% of the tyrosine side chains were cross-linked by TrTyr at high dosages. When Tgase was used, no changes were observed because a different cross-linking mechanism was operational. However, this verified the success of the phosphitylation of phenolics within the protein matrix in the IL. Atomic force microscopy (AFM) in solid state showed that disk-shaped nanoparticles were formed in the reactions with average diameters of 80 and 20 nm for TrTyr and Tgase, respectively. These data further advance the current understanding of the action of tyrosinases on proteins on molecular and chemical bond levels. Quantitative (31)P NMR in IL was shown to be a simple and efficient method for the study of protein modification.
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The presence of membranes or micelles induces structural changes of the myristoylated guanylate-cyclase activating protein-2. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2011; 40:565-76. [DOI: 10.1007/s00249-011-0680-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 01/20/2011] [Accepted: 01/25/2011] [Indexed: 10/18/2022]
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24
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Meirovitch E, Shapiro YE, Polimeno A, Freed JH. Structural dynamics of bio-macromolecules by NMR: the slowly relaxing local structure approach. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2010; 56:360-405. [PMID: 20625480 PMCID: PMC2899824 DOI: 10.1016/j.pnmrs.2010.03.002] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Affiliation(s)
- Eva Meirovitch
- The Mina and Everard Goodman Faculty of Life Sciences, Bar–Ilan University, Ramat-Gan 52900 Israel
| | - Yury E. Shapiro
- The Mina and Everard Goodman Faculty of Life Sciences, Bar–Ilan University, Ramat-Gan 52900 Israel
| | - Antonino Polimeno
- Department of Physical Chemistry, University of Padua, 35131 Padua, Italy
| | - Jack H. Freed
- Baker Laboratory of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853-1301, U.S.A
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25
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A solid-state NMR study of the structure and dynamics of the myristoylated N-terminus of the guanylate cyclase-activating protein-2. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:266-74. [DOI: 10.1016/j.bbamem.2009.06.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Revised: 06/16/2009] [Accepted: 06/29/2009] [Indexed: 11/30/2022]
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