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Phys. Rev. Lett. 94, 018101 (2005) [4 pages]

In Silico Folding of a Three Helix Protein and Characterization of Its Free-Energy Landscape in an All-Atom Force Field

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T. Herges and W. Wenzel*
Forschungszentrum Karlsruhe, Institut für Nanotechnologie, 76021 Karlsruhe, Germany

Received 29 October 2003; published 5 January 2005

We report the reproducible first-principles folding of the 40 amino-acid, three-helix headpiece of the HIV accessory protein in a recently developed all-atom free-energy force field. Six of 20 simulations using an adapted basin-hopping method converged to better than 3 Å backbone rms deviation to the experimental structure. Using over 60 000 low-energy conformations of this protein, we constructed a decoy tree that completely characterizes its folding funnel.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.018101
DOI:
10.1103/PhysRevLett.94.018101
PACS:
87.15.Cc, 02.60.Pn, 02.70.Ns

*Electronic address: wenzel@int.fzk.de