Comparison of the structures and stabilities of coiled-coil proteins containing hexafluoroleucine and t-butylalanine provides insight into the stabilizing effects of highly fluorinated amino acid side-chains.
Buer, B.C., Meagher, J.L., Stuckey, J.A., Marsh, E.N.(2012) Protein Sci 21: 1705-1715
- PubMed: 22930450 
- DOI: 10.1002/pro.2150
- Primary Citation of Related Structures:  
4G3B, 4G4L, 4G4M - PubMed Abstract: 
Highly fluorinated analogs of hydrophobic amino acids are well known to increase the stability of proteins toward thermal unfolding and chemical denaturation, but there is very little data on the structural consequences of fluorination. We have determined the structures and folding energies of three variants of a de novo designed 4-helix bundle protein whose hydrophobic cores contain either hexafluoroleucine (hFLeu) or t-butylalanine (tBAla) ...