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- W2018525038 abstract "The design, synthesis, and structural characterization of a highly fluorinated peptide system based on the coiled coil region of the yeast transcription factor GCN4 is described. All four leucine residues (a position) and three valine residues (d position) were replaced by the unnatural amino acids 5,5,5-trifluoroleucine and 4,4,4-trifluorovaline, respectively. The peptide is highly α-helical at low micromolar concentrations as judged by circular dichroism spectra, sediments as a dimeric species in the 5−30 μM concentration range, and exhibits a dimer melting temperature that is 15 °C higher than a control peptide with a hydrocarbon core. Furthermore, the apparent free energy of unfolding as calculated from guanidinium hydrochloride denaturation experiments is larger by ∼1.0 kcal/mol for the fluorinated peptide than its hydrocarbon counterpart. We conclude that additional stability is derived from sequestering the more hydrophobic trifluoromethyl groups from aqueous solvent. These studies introduce a new paradigm in the design of molecular self-assembling systems, one based on orthogonal solubility properties of liquid phases." @default.
- W2018525038 created "2016-06-24" @default.
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- W2018525038 date "2001-04-12" @default.
- W2018525038 modified "2023-10-18" @default.
- W2018525038 title "A Coiled Coil with a Fluorous Core" @default.
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- W2018525038 doi "https://doi.org/10.1021/ja002961j" @default.
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