Anharmonicity and self-similarity of the free energy landscape of protein G

Details Anharmonicity and self-similarity of the free energy landscape of protein G Anharmonicity and self-similarity of the free energy landscape of protein G

2006-12-12

arxiv.org/abs/q-bio/0612020v1

Biology

Quantitative Biology

Biomolecules

revtex, 6 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.98.048102

The near-native free energy landscape of protein G is investigated through 0.4 microseconds-long atomistic molecular dynamics simulations in explicit solvent. A theoretical and computational framework is used to assess the time-dependence of salient thermodynamical features. While the quasi-harmonic character of the free energy is found to degrade in a few ns, the slow modes display a very mild dependence on the trajectory duration. This property originates from a striking self-similarity of the free energy landscape embodied by the consistency of the principal directions of the local minima, where the system dwells for several ns, and of the virtual jumps connecting them.

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