The presence of conformational substates of a catalytically competent 'closed' state in the ligand-free form of adenylate kinase is detected. Molecular dynamics simulations indicated that the partially closed conformations were sampled in nanoseconds, and NMR and single-molecule FRET experiments revealed the sampling of a fully closed conformation occurring on the microsecond-to-millisecond timescale.
- Katherine A. Henzler-Wildman
- Vu Thai
- Dorothee Kern