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Structural characterization of the antimicrobial peptides myxinidin and WMR in bacterial membrane mimetic micelles and bicelles.
Biochim. Biophys. Acta-Biomembr. 1866:184272 (2024)
Antimicrobial peptides are a promising class of potential antibiotics that interact selectively with negatively charged lipid bilayers. This paper presents the structural characterization of the antimicrobial peptides myxinidin and WMR associated with bacterial membrane mimetic micelles and bicelles by NMR, CD spectroscopy, and molecular dynamics simulations. Both peptides adopt a different conformation in the lipidic environment than in aqueous solution. The location of the peptides in micelles and bicelles has been studied by paramagnetic relaxation enhancement experiments with paramagnetic tagged 5- and 16-doxyl stearic acid (5-/16-SASL). Molecular dynamics simulations of multiple copies of the peptides were used to obtain an atomic level of detail on membrane-peptide and peptide-peptide interactions. Our results highlight an essential role of the negatively charged membrane mimetic in the structural stability of both myxinidin and WMR. The peptides localize predominantly in the membrane's headgroup region and have a noticeable membrane thinning effect on the overall bilayer structure. Myxinidin and WMR show a different tendency to self-aggregate, which is also influenced by the membrane composition (DOPE/DOPG versus DOPE/DOPG/CL) and can be related to the previously observed difference in the ability of the peptides to disrupt different types of model membranes.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Antimicrobial Peptides ; Bicelle ; Cd ; Liposome ; Membrane Mimetic ; Micelle ; Nmr ; Peptide Lipid Interactions ; Peptide Membrane Interactions ; Suv; Particle Mesh Ewald; Fatc Domain; Lipid-bilayers; Nmr; Antibacterial; Simulations; Rapamycin; Anchor; Target
ISSN (print) / ISBN
0005-2736
e-ISSN
1879-2642
Quellenangaben
Volume: 1866,
Issue: 3,
Article Number: 184272
Publisher
Elsevier
Publishing Place
Radarweg 29, 1043 Nx Amsterdam, Netherlands
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Structural Biology (STB)
Grants
Italian MUR
Canada Foundation
Canada Research Chairs program
Natural Sciences and Engineering Research Council (Canada)
Helmholtz portfolio theme 'metabolic dysfunction and common disease' of the Helmholtz Zentrum Muenchen
Technische Universitat Munchen (TUM) diversity and talent management office by a Laura-Bassi Award
German Research Foundation
Canada Foundation
Canada Research Chairs program
Natural Sciences and Engineering Research Council (Canada)
Helmholtz portfolio theme 'metabolic dysfunction and common disease' of the Helmholtz Zentrum Muenchen
Technische Universitat Munchen (TUM) diversity and talent management office by a Laura-Bassi Award
German Research Foundation