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Data-driven coarse graining of large biomolecular structures

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  • Yi-Ling Chen
  • Michael Habeck

Abstract

Advances in experimental and computational techniques allow us to study the structure and dynamics of large biomolecular assemblies at increasingly higher resolution. However, with increasing structural detail it can be challenging to unravel the mechanism underlying the function of molecular machines. One reason is that atomistic simulations become computationally prohibitive. Moreover it is difficult to rationalize the functional mechanism of systems composed of tens of thousands to millions of atoms by following each atom’s movements. Coarse graining (CG) allows us to understand biological structures from a hierarchical perspective and to gradually zoom into the adequate level of structural detail. This article introduces a Bayesian approach for coarse graining biomolecular structures. We develop a probabilistic model that aims to represent the shape of an experimental structure as a cloud of bead particles. The particles interact via a pairwise potential whose parameters are estimated along with the bead positions and the CG mapping between atoms and beads. Our model can also be applied to density maps obtained by cryo-electron microscopy. We illustrate our approach on various test systems.

Suggested Citation

  • Yi-Ling Chen & Michael Habeck, 2017. "Data-driven coarse graining of large biomolecular structures," PLOS ONE, Public Library of Science, vol. 12(8), pages 1-17, August.
    • Handle: RePEc:plo:pone00:0183057
    DOI: 10.1371/journal.pone.0183057
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    1. Katherine Henzler-Wildman & Dorothee Kern, 2007. "Dynamic personalities of proteins," Nature, Nature, vol. 450(7172), pages 964-972, December.
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