Energy transfer in nonlinear network models of proteinsF. Piazza1 and Y.-H. Sanejouand2
1 Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Biophysique Statistique, ITP-SB - BSP-720, CH-1015 Lausanne, Switzerland
2 Laboratoire U3B, UMR 6204 du CNRS, Faculté des Sciences et des Techniques - 2, rue de la Houssinière, 44322 Nantes Cedex 3, France, EU
received 19 October 2009; accepted in final form 18 November 2009; published December 2009
published online 21 December 2009
We investigate how nonlinearity and topological disorder affect the energy relaxation of local kicks in coarse-grained network models of proteins. We find that nonlinearity promotes long-range, coherent transfer of substantial energy to specific functional sites, while depressing transfer to generic locations. In some cases, transfer is mediated by the self-localization of discrete breathers at distant locations from the kick, acting as efficient energy-accumulating centers.
87.15.-v - Biomolecules: structure and physical properties.
63.20.Pw - Localized modes.
05.45.-a - Nonlinear dynamics and chaos.
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