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Protein function is governed by the underlying conformational dynamics of the molecule. The experimental and theoretical work leading to contemporary understanding of enzyme dynamics was mostly restricted to the large-scale movements of single-domain proteins. Collective movements resulting from a regulatory interplay between protein domains is often crucial for enzymatic activity. It is not clear,...
The proline-, glutamate-, valine-, and lysine-rich (PEVK) domain of the giant muscle protein titin is thought to be an intrinsically unstructured random-coil segment. Various observations suggest, however, that the domain may not be completely devoid of internal interactions and structural features. To test the validity of random polymer models for PEVK, we determined the mean end-to-end distances...