Dec 7 – 8, 2021 Online only
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Stable DOPG/glycyrrhizin vesicles with a wide range of mixing ratios: Structure and stability as seen by scattering experiments and cryo-TEM

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Dec 7, 2021, 2:05 PM
Talk Soft Matter Soft Matter


Prof. Thomas Hellweg (Universität Bielefeld, PCIII)


This study investigates the role of charged lipids in the plasma membrane with respect to the interaction of the antiviral saponin glycyrrhizin with such membranes. Glycyrrhizin is a natural triterpenic-based surfactant found in licorice. Vesicles made of 1,2-dioleoyl-sn-glycero-3-phospho-rac-(1’-glycerol) (DOPG)/glycyrrhizin are characterized by small-angle scattering with neutrons and X-rays (SANS and SAXS). Small-angle scattering data are first evaluated by the model-independent modified Kratky–Porod method and afterwards fitted by a model describing the shape of small unilamellar vesicles (SUV) with an internal head-tail contrast. Complete miscibility of DOPG and glycyrrhizin was revealed even at a ratio of lipid:saponin of 1:1. This is in line with the observation of glycyrrhizin not being haemolytic. Additional information about the chain-chain correlation distance of the lipid/saponin mixtures in the SUV structures is obtained from wide-angle X-ray scattering (WAXS).

Primary authors

Dr Carina Dargel (WWU Münster) Friederike Gräbitz-Bräuer Dr Ramsia Geisler (Uniklinikum Frankfurt) Pascal Fandrich (Universität Bielefeld) Dr Yvonne Hannappel (Universität Bielefeld) Dr Lionel Porcar (ILL) Prof. Thomas Hellweg (Universität Bielefeld, PCIII)

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