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- W2323737385 abstract "Nanoparticles, 10–30 nm in size, have shown great prospects as nanocarriers for drug delivery. We designed amphiphiles based on 3-helix peptide-PEG conjugate forming 15 nm micelles (defined as “3-helix micelles”) with good in vivo stability. Here, we investigated the effect of the site of PEG conjugation on the kinetic stability and showed that the conjugation site affects the PEG chain conformation and the overall molecular architecture of the subunit. Compared to the original design where the PEG chain is located in the middle of the 3-helix bundle, micelle kinetic stability was reduced when the PEG chain was attached near the N-terminus (t1/2 = 35 h) but was enhanced when the PEG chain was attached near the C-terminus (t1/2 = 80 h). Quantitative structural and kinetic analysis suggest that the kinetic stability was largely dictated by the combined effects of entropic repulsion associated with PEG chain conformation and the geometric packing of the trimeric subunits. The modular design approach coupled with a variety of well-defined protein stucture and functional polymers will significantly expand the utility of these materials as nanocarriers to meet current demands in nanomedine." @default.
- W2323737385 created "2016-06-24" @default.
- W2323737385 creator A5052422809 @default.
- W2323737385 creator A5057079069 @default.
- W2323737385 creator A5068136186 @default.
- W2323737385 date "2015-01-30" @default.
- W2323737385 modified "2023-10-14" @default.
- W2323737385 title "Micelle Stabilization via Entropic Repulsion: Balance of Force Directionality and Geometric Packing of Subunit" @default.
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- W2323737385 doi "https://doi.org/10.1021/bm501659w" @default.
- W2323737385 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25575164" @default.
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