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Rondelli V, Koutsioubas A, Pršić J, Deboever E, Crowet JM, Lins L, Deleu M. Sitosterol and glucosylceramide cooperative transversal and lateral uneven distribution in plant membranes. Sci Rep 2021; 11:21618. [PMID: 34732753 PMCID: PMC8566578 DOI: 10.1038/s41598-021-00696-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/05/2021] [Indexed: 11/13/2022] Open
Abstract
The properties of biomembranes depend on the presence, local structure and relative distribution assumed by the thousands of components it is made of. As for animal cells, plant membranes have been demonstrated to be organized in subdomains with different persistence lengths and times. In plant cells, sitosterol has been demonstrated to confer to phospholipid membranes a more ordered structure while among lipids, glycosphingolipids are claimed to form rafts where they tightly pack with sterols. Glucosylceramides are glycosphingolipids involved in plant signalling and are essential for viability of cells and whole plant. The glucosylceramide-sitosterol structural coupling within PLPC membranes is here investigated by Langmuir films, in silico simulations and neutron reflectometry, unveiling that a strong direct interaction between the two molecules exists and governs their lateral and transversal distribution within membrane leaflets. The understanding of the driving forces governing specific molecules clustering and segregation in subdomains, such as glucosylceramide and sitosterol, have an impact on the mechanical properties of biomembranes and could reflect in the other membrane molecules partitioning and activity.
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Affiliation(s)
- V Rondelli
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Milano, Italy.
| | - A Koutsioubas
- Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum, Forschungszentrum Jülich GmbH, Garching, Germany.
| | - J Pršić
- Microbial Processes and Interactions Laboratory (MiPI), TERRA Research Center, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium
| | - E Deboever
- Laboratoire de Biophysique Moléculaire aux Interfaces, Structure Fédérative de Recherche Condorcet, TERRA Research Center, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium.,Laboratory of Natural Molecules Chemistry, Gembloux Agro-Bio Tech, University of Liège, 2, Passage des Déportés, 5030, Gembloux, Belgium.,FytoFend S.A., rue Georges Legrand, 6, 5032, Isnes, Belgium
| | - J M Crowet
- Université de Reims Champagne-Ardenne, UFR Sciences Exactes et Naturelles, Reims, France
| | - L Lins
- Laboratoire de Biophysique Moléculaire aux Interfaces, Structure Fédérative de Recherche Condorcet, TERRA Research Center, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium
| | - M Deleu
- Laboratoire de Biophysique Moléculaire aux Interfaces, Structure Fédérative de Recherche Condorcet, TERRA Research Center, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium.
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Holderer O, Koutsioubas A, Garvey CJ, Nylander T. Editorial: Membrane Structure and Dynamics Studied With Neutron Scattering. Front Chem 2021; 9:732062. [PMID: 34490212 PMCID: PMC8417354 DOI: 10.3389/fchem.2021.732062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 08/06/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- O Holderer
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Garching, Germany
| | - A Koutsioubas
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Garching, Germany
| | - C J Garvey
- Lund Institute for Advanced Neutron and X-ray Science, Lund, Sweden.,Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Garching, Germany
| | - T Nylander
- Lund Institute for Advanced Neutron and X-ray Science, Lund, Sweden.,Department of Chemistry, Lund University, Lund, Sweden
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Mangiapia G, Gvaramia M, Kuhrts L, Teixeira J, Koutsioubas A, Soltwedel O, Frielinghaus H. Effect of benzocaine and propranolol on phospholipid-based bilayers. Phys Chem Chem Phys 2017; 19:32057-32071. [DOI: 10.1039/c7cp06077g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Drug/bilayer interactions are fundamental in determining the action mechanism of active ingredients. Neutron techniques represent unique tools for having a clear comprehension of such interactions.
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Affiliation(s)
- G. Mangiapia
- Forschungszentrum Jülich GmbH
- Jülich Centre for Neutron Science Außenstelle am Heinz Maier-Leibnitz Zentrum
- D-85747 Garching
- Germany
| | - M. Gvaramia
- Forschungszentrum Jülich GmbH
- Jülich Centre for Neutron Science Außenstelle am Heinz Maier-Leibnitz Zentrum
- D-85747 Garching
- Germany
- Ivane Javakhishvili Tbilisi State University
| | - L. Kuhrts
- Forschungszentrum Jülich GmbH
- Jülich Centre for Neutron Science Außenstelle am Heinz Maier-Leibnitz Zentrum
- D-85747 Garching
- Germany
| | - J. Teixeira
- Laboratoire Léon Brillouin (CEA-CNRS)
- CEA-Saclay
- F-91191 Gif-sur-Yvette CEDEX
- France
| | - A. Koutsioubas
- Forschungszentrum Jülich GmbH
- Jülich Centre for Neutron Science Außenstelle am Heinz Maier-Leibnitz Zentrum
- D-85747 Garching
- Germany
| | - O. Soltwedel
- Heinz Maier-Leibnitz Zentrum
- Technische Universität München
- D-85747 Garching
- Germany
| | - H. Frielinghaus
- Forschungszentrum Jülich GmbH
- Jülich Centre for Neutron Science Außenstelle am Heinz Maier-Leibnitz Zentrum
- D-85747 Garching
- Germany
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Syed Mohd A, Pütter S, Mattauch S, Koutsioubas A, Schneider H, Weber A, Brückel T. A versatile UHV transport and measurement chamber for neutron reflectometry under UHV conditions. Rev Sci Instrum 2016; 87:123909. [PMID: 28040933 DOI: 10.1063/1.4972993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on a versatile mini ultra-high vacuum (UHV) chamber which is designed to be used on the MAgnetic Reflectometer with high Incident Angle of the Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum in Garching, Germany. Samples are prepared in the adjacent thin film laboratory by molecular beam epitaxy and moved into the compact chamber for transfer without exposure to ambient air. The chamber is based on DN 40 CF flanges and equipped with sapphire view ports, a small getter pump, and a wobble stick, which serves also as sample holder. Here, we present polarized neutron reflectivity measurements which have been performed on Co thin films at room temperature in UHV and in ambient air in a magnetic field of 200 mT and in the Q-range of 0.18 Å-1. The results confirm that the Co film is not contaminated during the polarized neutron reflectivity measurement. Herewith it is demonstrated that the mini UHV transport chamber also works as a measurement chamber which opens new possibilities for polarized neutron measurements under UHV conditions.
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Affiliation(s)
- A Syed Mohd
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - S Pütter
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - S Mattauch
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - A Koutsioubas
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - H Schneider
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - A Weber
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
| | - T Brückel
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany
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Strauß F, Dörrer L, Geue T, Stahn J, Koutsioubas A, Mattauch S, Schmidt H. Erratum: Self-Diffusion in Amorphous Silicon [Phys. Rev. Lett. 116, 025901 (2016)]. Phys Rev Lett 2016; 116:089903. [PMID: 26967448 DOI: 10.1103/physrevlett.116.089903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Indexed: 06/05/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.116.025901.
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Fadda GC, Lairez D, Guennouni Z, Koutsioubas A. Peptide pores in lipid bilayers: voltage facilitation pleads for a revised model. Phys Rev Lett 2013; 111:028102. [PMID: 23889447 DOI: 10.1103/physrevlett.111.028102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Indexed: 06/02/2023]
Abstract
We address the problem of antimicrobial peptides that create pores in lipid bilayers, focusing on voltage-temperature dependence of pore opening. Two novel experiments (voltage clamp with alamethicin as an emblematic representative of these peptides and neutron reflectivity of lipid monolayer at solid-water interface under electric field) serve to revise the only current theoretical model. We introduce a general contribution of peptide adsorption and electric field as being responsible for an unbalanced tension of the two bilayer leaflets and we claim that the main entropy cost of one pore opening is due to the corresponding excluded area for lipid translation.
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Affiliation(s)
- G C Fadda
- Laboratoire Léon Brillouin, CEA/CNRS UMR 12, CEA-Saclay, 91191 Gif-sur-Yvette, France
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Koutsioubas A, Lairez D, Combet S, Fadda GC, Longeville S, Zalczer G. Crowding effect on helix-coil transition: Beyond entropic stabilization. J Chem Phys 2012; 136:215101. [DOI: 10.1063/1.4723871] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tasserit C, Koutsioubas A, Lairez D, Zalczer G, Clochard MC. Pink noise of ionic conductance through single artificial nanopores revisited. Phys Rev Lett 2010; 105:260602. [PMID: 21231637 DOI: 10.1103/physrevlett.105.260602] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Revised: 09/09/2010] [Indexed: 05/28/2023]
Abstract
We report voltage-clamp measurements through single conical nanopore obtained by chemical etching of a single ion track in polyimide film. Special attention is paid to the pink noise of the ionic current (i.e., 1/f noise) measured with different filling liquids. The relative pink-noise amplitude is almost independent of concentration and pH for KCl solutions, but varies strongly using ionic liquids. In particular, we show that depending on the ionic liquid, the transport of charge carriers is strongly facilitated (low noise and higher conductivity than in the bulk) or jammed. These results show that the origin of the pink noise can be ascribed neither to fluctuations of the pore geometry nor to the pore wall charges, but rather to a cooperative effect on ions motion in confined geometry.
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Affiliation(s)
- C Tasserit
- Laboratoire Léon Brillouin, CEA/CNRS UMR 12, CEA-Saclay, Gif-sur-Yvette, France
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