Compactness of the Denatured State of a Fast-Folding Protein Measured by Submillisecond Small-Angle X-Ray Scattering
Time-resolved small-angle x-ray scattering was used to measure the radius of gyration of cytochrome c after initiation of folding by a pH jump. Submillisecond time resolution was obtained with a microfabricated diffusional mixer and synchrotron radiation. The results show that the protein first collapses to compact denatured structures before folding very fast to the native state.
Proceedings of the National Academy of Science
- Pub Date:
- August 1999