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. 2019 Oct 7;58(41):14489-14494.
doi: 10.1002/anie.201907278. Epub 2019 Sep 3.

Dynamics of Synthetic Membraneless Organelles in Microfluidic Droplets

Miriam Linsenmeier  1 , Marie R G Kopp  1 , Fulvio Grigolato  1 , Leonidas Emmanoulidis  2 , Dany Liu  1 , Dominik Zürcher  1 , Maria Hondele  3 , Karsten Weis  3 , Umberto Capasso Palmiero  1 , Paolo Arosio  1
Affiliations

Dynamics of Synthetic Membraneless Organelles in Microfluidic Droplets

Miriam Linsenmeier et al. Angew Chem Int Ed Engl. .

Erratum in

Abstract

Cells can form membraneless organelles by liquid-liquid phase separation. As these organelles are highly dynamic, it is crucial to understand the kinetics of these phase transitions. Here, we use droplet-based microfluidics to mix reagents by chaotic advection and observe nucleation, growth, and coarsening in volumes comparable to cells (pL) and on timescales of seconds. We apply this platform to analyze the dynamics of synthetic organelles formed by the DEAD-box ATPase Dhh1 and RNA, which are associated with the formation of processing bodies in yeast. We show that the timescale of phase separation decreases linearly as the volume of the compartment increases. Moreover, the synthetic organelles coarsen into one single droplet via gravity-induced coalescence, which can be arrested by introducing a hydrogel matrix that mimics the cytoskeleton. This approach is an attractive platform to investigate the dynamics of compartmentalization in artificial cells.

Keywords: kinetics; membraneless organelles; microfluidics; nonequilibrium processes; phase transitions.

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