Circular Permutation of the Trp-cage: Fold Rescue upon Addition of a Hydrophobic Staple.
Byrne, A., Kier, B.L., Williams, D.V., Scian, M., Andersen, N.H.(2013) RSC Adv 2013: 19824-19829
- PubMed: 24376912
- DOI: https://doi.org/10.1039/C3RA43674H
- Primary Citation of Related Structures:
2M7C, 2M7D - PubMed Abstract:
The Trp-cage, at 20 residues in length, is generally acknowledged as the smallest fully protein-like folding motif. Linking the termini by a two-residue unit and excising one residue affords circularly permuted sequences that adopt the same structure. This represents the first successful circular permutation of any fold of less than 50-residue length. As was observed for the original topology, a hydrophobic staple near the chain termini is required for enhanced fold stability.
Organizational Affiliation:
Department of Chemistry, University of Washington Seattle, Washington, 98195, USA andersen@chem.washington.edu.