The Production of Matchout-Deuterated Cholesterol and the Study of Bilayer-Cholesterol Interactions

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The Production of Matchout-Deuterated Cholesterol and the Study of Bilayer-Cholesterol Interactions

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Publication Article, peer reviewed scientific
Title The Production of Matchout-Deuterated Cholesterol and the Study of Bilayer-Cholesterol Interactions
Author Waldie, Sarah ; Moulin, Martine ; Porcar, Lionel ; Pichler, Harald ; Strohmeier, Gernot A ; Skoda, Maximilian ; Forsyth, V Trevor ; Haertlein, Michael ; Maric, Selma ; Cárdenas, Marité
Research Centre Biofilms - Research Center for Biointerfaces
Date 2019
English abstract
The deuteration of biomolecules provides advanced opportunities for neutron scattering studies. For low resolution studies using techniques such as small-angle neutron scattering and neutron reflection, the level of deuteration of a sample can be varied to match the scattering length density of a specific DO/HO solvent mixture. This can be of major value in structural studies where specific regions of a complex system can be highlighted, and others rendered invisible. This is especially useful in analyses of the structure and dynamics of membrane components. In mammalian membranes, the presence of cholesterol is crucial in modulating the properties of lipids and in their interaction with proteins. Here, a protocol is described for the production of partially deuterated cholesterol which has a neutron scattering length density that matches that of 100% DO solvent (hereby named matchout cholesterol). The level of deuteration was determined by mass spectrometry and nuclear magnetic resonance. The cholesterol match-point was verified experimentally using small angle neutron scattering. The matchout cholesterol was used to investigate the incorporation of cholesterol in various phosphatidylcholine supported lipid bilayers by neutron reflectometry. The study included both saturated and unsaturated lipids, as well as lipids with varying chain lengths. It was found that cholesterol is distributed asymmetrically within the bilayer, positioned closer to the headgroups of the lipids than to the middle of the tail core, regardless of the phosphatidylcholine species.
DOI https://doi.org/10.1038/s41598-019-41439-z (link to publisher's fulltext.)
Link https://doi.org/10.1038/s41598-019-41439-z .Icon
Publisher Springer Nature
Host/Issue Scientific reports;1
Volume 9
ISSN 2045-2322
Pages 5118
Language eng (iso)
Subject Sciences
Research Subject Categories::INTERDISCIPLINARY RESEARCH AREAS
Note Sci Rep
Handle http://hdl.handle.net/2043/29615 Permalink to this page
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