Dresden 2006 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 26: Brownian Motion and Kinetic Theory II

DY 26.5: Vortrag

Dienstag, 28. März 2006, 17:15–17:30, H\"UL 186

Anomalous diffusion in proteins — •Thomas Neusius and Jeremy C. Smith — Computational Molecular Biophysics Group, Interdisziplinäres Zentrum für wissenschaftliches Rechnen, Im Neuenheimer Feld 368, 69120 Heidelberg

Diffusion processes which show long time memory effects are discussed in many fields of physics. The subdiffusive behavior of a single protein mode was described recently in the framework of generalised Langevin equations with fractional noise [1].

The underlying microscopic dynamics leading to this specific kind of noise are yet to be completely understood. The characterisation of the emergence of anomalous diffusion by looking at different types protein modes will be undertaken. We assume that there are different categories which can be defined by their contribution to quanteties such as the mean square deviation or their degree of anharmonicity. As the anomalous diffusion is a property of the whole molecule, it is likely that only the modes involving a large number of atoms show strong deviations from the classical Brownian motion.

[1] S. C. Kou and X. Sunney Xie: Phys. Rev. Lett. 93 (2004) 18, p. 180603.