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Extreme dynamics in a biomolecular condensate

Proteins and nucleic acids can phase-separate in the cell to form concentrated biomolecular condensates1–4. The functions of condensates span many length scales: they modulate interactions and chemical reactions at the molecular scale5, organize biochemical processes at the mesoscale6 and compartmentalize cells4. Understanding the underlying mechanisms of these processes will require detailed knowledge of the rich dynamics across these scales7. The mesoscopic dynamics of biomolecular condensates have been extensively characterized8, but their behaviour at the molecular scale has remained more elusive. Here, as an example of biomolecular phase separation, we study complex coacervates of two highly and oppositely charged disordered human proteins9. Their dense phase is 1,000 times more concentrated than the dilute phase, and the resulting percolated interaction network10 leads to a bulk viscosity 300 times greater than that of water. However, single-molec ....

United Kingdom , Molecular Properties , S Ys Resonance Energy , Ww Norton Company , Cell Biol , Acta Proteins , Matter Phys , Polymer Physics , Charged Macromolecules , Biological Systems , Theory Comput , Colloid Interface Sci , Der Meer , Energy Transfer , Advanced Transport Phenomena , Fluid Mechanics , Convective Transport Processes , Fluid Mech , Colloid Interfac , Depletion Interaction , Den Bosch , Polymer Dynamics ,