Hydration dynamics at fluorinated protein surfaces.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 20855583.
- Also identified by DOI 10.1073/pnas.1011569107 and PMC identifier 2951393.
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Abstract
Water-protein interactions dictate many processes crucial to protein function including folding, dynamics, interactions with other biomolecules, and enzymatic catalysis. Here we examine the effect of surface fluorination on water-protein interactions. Modification of designed coiled-coil proteins by incorporation of 5,5,5-trifluoroleucine or (4S)-2-amino-4-methylhexanoic acid enables systematic examination of the effects of side-chain volume and fluorination on solvation dynamics. Using ultrafast fluorescence spectroscopy, we find that fluorinated side chains exert electrostatic drag on neighboring water molecules, slowing water motion at the protein surface.
Medical subject headings
- Fluorine
- Protein Structure, Secondary
- Proteins
- Water