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- W4311455717 abstract "Gram-negative bacteria are equipped with a cell wall that contains a complex matrix of lipids, proteins, and glycans, which form a rigid layer protecting bacteria from the environment. Major components of this outer membrane are the high-molecular weight and amphiphilic lipopolysaccharides (LPSs). They form the extracellular part of a heterobilayer with phospholipids. Understanding LPS properties within the outer membrane is therefore important to develop new antimicrobial strategies. Model systems, such as giant unilamellar vesicles (GUVs), provide a suitable platform for exploring membrane properties and interactions. However, LPS molecules contain large polysaccharide parts that confer high water solubility, which makes LPS incorporation in artificial membranes difficult; this hindrance is exacerbated for LPS with long polysaccharide chains, i.e., the smooth LPS. Here, a novel emulsification step of the inverted emulsion method is introduced to incorporate LPS in the outer or the inner leaflet of GUVs, exclusively. We developed an approach to determine the LPS content on individual GUVs and quantify membrane asymmetry. The asymmetric membranes with outer leaflet LPS show incorporations of 1-16 mol % smooth LPS (corresponding to 16-79 wt %), while vesicles with inner leaflet LPS reach coverages of 2-7 mol % smooth LPS (28-60 wt %). Diffusion coefficient measurements in the obtained GUVs showed that increasing LPS concentrations in the membranes resulted in decreased diffusivity." @default.
- W4311455717 created "2022-12-26" @default.
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- W4311455717 creator A5071086704 @default.
- W4311455717 date "2023-06-01" @default.
- W4311455717 modified "2023-09-25" @default.
- W4311455717 title "Biomimetic asymmetric bacterial membranes incorporating lipopolysaccharides" @default.
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- W4311455717 doi "https://doi.org/10.1016/j.bpj.2022.12.017" @default.
- W4311455717 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36523159" @default.
- W4311455717 hasPublicationYear "2023" @default.
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