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Paracini, Nicoló; Schneck, Emanuel; Imberty, Anne; Micciulla, Samantha
Advances in colloid and interface science, 03/2022, Letnik: 301Journal Article
Lipopolysaccharides (LPSs) are a constitutive element of the cell envelope of Gram-negative bacteria, representing the main lipid in the external leaflet of their outer membrane (OM) lipid bilayer. These unique surface-exposed glycolipids play a central role in the interactions of Gram-negative organisms with their surrounding environment and represent a key element for protection against antimicrobials and the development of antibiotic resistance. The biophysical investigation of a wide range of different types of in vitro model membranes containing reconstituted LPS has revealed functional and structural properties of these peculiar membrane lipids, providing molecular-level details of their interaction with antimicrobial compounds. LPS assemblies reconstituted at interfaces represent a versatile tool to study the properties of the Gram-negative OM by exploiting several surface-sensitive techniques, in particular X-ray and neutron scattering, which can probe the structure of thin films with sub-nanometer resolution. This review provides an overview of different approaches employed to investigate structural and biophysical properties of LPS, focusing on studies on Langmuir monolayers of LPS at the air/liquid interface and a range of supported LPS-containing model membranes reconstituted at solid/liquid interfaces. Display omitted •Gram-negative bacteria resist many antimicrobials thanks to a layer of lipopolysaccharides (LPS) in their cell envelope•In vitro model membranes containing LPS provide unique tools for biophysical studies of the bacterial surface•Molecular-level understanding of antibiotic interactions with LPS layers can aid the design of new effective drugs
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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