Plectoneme creation reduces the rotational friction of a polymerH. Wada1 and R. R. Netz2
1 Yukawa Institute for Theoretical Physics, Kyoto University - Kyoto 606-8502, Japan
2 Department of Physics, Technical University Munich - 85748 Garching, Germany, EU
received 3 April 2009; accepted in final form 15 July 2009; published August 2009
published online 24 August 2009
The torsional dynamics of a semiflexible polymer with a contour length L larger than its persistence length Lp that is rotated at fixed frequency at one end is studied by scaling arguments and hydrodynamic simulations. We find a non-equilibrium transition at a critical frequency : In the linear regime, , axial spinning is the dominant dissipation mode. In the non-linear regime, , the twist dissipation mode involves the continuous creation of plectonemes close to the driven end and the rotational friction is substantially reduced.
87.15.H- - Dynamics of biomolecules.
87.16.Ka - Filaments, microtubules, their networks, and supramolecular assemblies.
47.15.G- - Low-Reynolds-number (creeping) flows.
© EPLA 2009