title: Anomalous diffusion in fractal globules.
abstract: The fractal globule state is a popular model for describing chromatin packing in eukaryotic nuclei. Here we provide a scaling theory and dissipative particle dynamics computer simulation for the thermal motion of monomers in the fractal globule state. Simulations starting from different entanglement-free initial states show good convergence which provides evidence supporting the existence of a unique metastable fractal globule state. We show monomer motion in this state to be subdiffusive described by ⟨X(2)(t)⟩∼t(αF) with αF close to 0.4. This result is in good agreement with existing experimental data on the chromatin dynamics, which makes an additional argument in support of the fractal globule model of chromatin packing.
authors.affiliation: Physics Department, Moscow State University, 119991 Moscow, Russia.|Department of Applied Mathematics, National Research University Higher School of Economics, 101000 Moscow, Russia.
authors.forename: M V
authors.initials: MV
authors.lastname: Tamm
authors.affiliation: Physics Department, Moscow State University, 119991 Moscow, Russia.
authors.forename: L I
authors.initials: LI
authors.lastname: Nazarov
authors.affiliation: Physics Department, Moscow State University, 119991 Moscow, Russia.|Institute for Advanced Energy Related Nanomaterials, University of Ulm, D-89069 Ulm, Germany.
authors.forename: A A
authors.initials: AA
authors.lastname: Gavrilov
authors.affiliation: Physics Department, Moscow State University, 119991 Moscow, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Chertovich
mesh_terms: D000465:Algorithms; D002843:Chromatin / Q000737:chemistry* / Q000235:genetics*; D003198:Computer Simulation; D004058:Diffusion; D017709:Fractals; D006801:Humans; D008956:Models, Chemical; D008957:Models, Genetic
chemical_list: D002843:Chromatin