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Overlapping Properties of the Short Membrane-Active Peptide BP100 With (i) Polycationic TAT and (ii) α-helical Magainin Family Peptides

Mink, Christian 1; Strandberg, Erik 2; Wadhwani, Parvesh 2; Melo, Manuel N.; Reichert, Johannes 2; Wacker, Irene; Castanho, Miguel A. R. B.; Ulrich, Anne S. 1,2
1 Institut für Organische Chemie (IOC), Karlsruher Institut für Technologie (KIT)
2 Institut für Biologische Grenzflächen (IBG), Karlsruher Institut für Technologie (KIT)

BP100 is a short, designer-made membrane-active peptide with multiple functionalities: antimicrobial, cell-penetrating, and fusogenic. Consisting of five lysines and 6 hydrophobic residues, BP100 was shown to bind to lipid bilayers as an amphipathic α-helix, but its mechanism of action remains unclear. With these features, BP100 embodies the characteristics of two distinctly different classes of membrane-active peptides, which have been studied in detail and where the mechanism of action is better understood. On the one hand, its amphiphilic helical structure is similar to the pore forming magainin family of antimicrobial peptides, though BP100 is much too short to span the membrane. On the other hand, its length and high charge density are reminiscent of the HIV-TAT family of cell penetrating peptides, for which inverted micelles have been postulated as translocation intermediates, amongst other mechanisms. Assays were performed to test the antimicrobial and hemolytic activity, the induced leakage and fusion of lipid vesicles, and cell uptake. From these results the functional profiles of BP100, HIV-TAT, and the magainin-like peptides magainin 2, PGLa, MSI-103, and MAP were determined and compared. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000133576
Veröffentlicht am 03.06.2021
DOI: 10.3389/fcimb.2021.609542
Zitationen: 1
Web of Science
Zitationen: 1
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Institut für Organische Chemie (IOC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2235-2988
KITopen-ID: 1000133576
HGF-Programm 47.14.01 (POF IV, LK 01) Molekular Information Processing in Cellular Systems
Erschienen in Frontiers in Cellular and Infection Microbiology
Verlag Frontiers Media
Band 11
Seiten Art.-Nr.: 609542
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Vorab online veröffentlicht am 26.04.2021
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