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• W4321763810 endingPage "2010" @default.
• W4321763810 startingPage "2002" @default.
• W4321763810 abstract "The cell-penetrating peptide NAF-1 has recently emerged as a promising candidate for selective penetration and destruction of cancer cells. It displays numerous membrane-selective behaviors including cell-specific uptake and organelle-specific degradation. In this work, we explore membrane penetration and translocation of NAF-1 in model lipid bilayer vesicles as a function of lipid identity in zwitterionic phosphatidylcholine lipids mixed with anionic phosphatidylserine, phosphatidylglycerol, and phosphatidic acid lipids. By monitoring the digestion of NAF-1 using the protease trypsin located inside but not outside the vesicles, we determined that the translocation of NAF-1 was significantly enhanced by the presence of phosphatidic acid in the membrane compared to the other three anionic or zwitterionic lipids. These findings were correlated to fluorescence measurements of dansyl-labeled NAF-1, which revealed whether noncovalent interactions between NAF-1 and the bilayer were most stable either at the membrane/solution interface or within the membrane interior. Phosphatidic acid promoted interactions with fatty acid tails, while phosphatidylcholine, phosphatidylserine, and phosphatidylglycerol stabilized interactions with polar lipid headgroups. Interfacial vibrational sum frequency spectroscopy experiments revealed that the phosphate moiety on phosphatidic acid headgroups was better hydrated than on the other three lipids, which helped to shuttle NAF-1 into the hydrophobic region. Our findings demonstrate that permeation does not depend on the net charge on phospholipid lipid headgroups in these model vesicles and suggest a model wherein NAF-1 crosses membranes selectively due to lipid-specific interactions at bilayer surfaces." @default.
• W4321763810 created "2023-02-25" @default.
• W4321763810 creator A5031114403 @default.
• W4321763810 creator A5050572384 @default.
• W4321763810 creator A5070516534 @default.
• W4321763810 date "2023-02-24" @default.
• W4321763810 modified "2023-09-28" @default.
• W4321763810 title "Lipid-Specific Direct Translocation of the Cell-Penetrating Peptide NAF-1^44–67 across Bilayer Membranes" @default.
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• W4321763810 doi "https://doi.org/10.1021/acs.jpcb.2c08076" @default.
• W4321763810 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36827970" @default.
• W4321763810 hasPublicationYear "2023" @default.
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