Random Matrix approach to collective behavior and bulk universality in protein dynamics

Details Random Matrix approach to collective behavior and bulk universality in protein dynamics Random Matrix approach to collective behavior and bulk universality in protein dynamics

2009-07-29

arxiv.org/abs/0907.5164v2

Phys. Rev. Lett. 103, 268101 (2009)

Biology

Quantitative Biology

Quantitative Methods

4 pages, 7 figures

Scientific paper

Covariance matrices of amino acid displacements, commonly used to characterize the large-scale movements of proteins, are investigated through the prism of Random Matrix Theory. Bulk universality is detected in the local spacing statistics of noise-dressed eigenmodes, which is well described by a Brody distribution with parameter $\beta\simeq 0.8$. This finding, supported by other consistent indicators, implies a novel quantitative criterion to single out the collective degrees of freedom of the protein from the majority of high-energy, localized vibrations.

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