Entropic barriers, transition states, funnels, and exponential protein folding kinetics: A simple model

Protein Science - Tập 9 Số 3 - Trang 452-465 - 2000
Paolo Calistri1, Attila Szabó1
1Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bldg. 5, Bethesda, Maryland 20892

Tóm tắt

AbstractThis paper presents an analytically tractable model that captures the most elementary aspect of the protein folding problem, namely that both the energy and the entropy decrease as a protein folds. In this model, the system diffuses within a sphere in the presence of an attractive spherically symmetric potential. The native state is represented by a small sphere in the center, and the remaining space is identified with unfolded states. The folding temperature, the time‐dependence of the populations, and the relaxation rate are calculated, and the folding dynamics is analyzed for both golf‐course and funnel‐like energy landscapes. This simple model allows us to illustrate a surprising number of concepts including entropic barriers, transition states, funnels, and the origin of single exponential relaxation kinetics.

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Protein Science

Tập 9 Số 3

452-465

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