Abstract
Reduced lattice models of the three de novo designed helical proteins α2, α2C, and α2D were studied. Low temperature stable folds were obtained for all three proteins. In all cases, the lowest energy folds were four-helix bundles. The folding pathway is qualitatively the same for all proteins studied. The energies of various topologies are similar, especially for the α2 polypeptide. The simulated crossover from molten globule to native-like behavior is very similar to that seen in experimental studies. Simulations on a reduced protein model reproduce most of the experimental properties of the α2, α2C, and α2D proteins. Stable four-helix bundle structures were obtained, with increasing native-like behavior on-going from α2 to α2D that mimics experiment. Proteins 2000;38:17–28. ©2000 Wiley-Liss, Inc.
Published Version
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