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Photoswitchable Phase Separation and Oligonucleotide Trafficking in DNA Coacervate Microdroplets
Author(s) -
Martin Nicolas,
Tian Liangfei,
Spencer Dan,
CoutablePennarun Angélique,
Anderson J. L. Ross,
Mann Stephen
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201909228
Subject(s) - coacervate , protocell , azobenzene , oligonucleotide , phase (matter) , dna , chemistry , membrane , biophysics , condensation , nanotechnology , chromatography , materials science , molecule , biology , biochemistry , organic chemistry , physics , thermodynamics
Coacervate microdroplets produced by liquid–liquid phase separation have been used as synthetic protocells that mimic the dynamical organization of membrane‐free organelles in living systems. Achieving spatiotemporal control over droplet condensation and disassembly remains challenging. Herein, we describe the formation and photoswitchable behavior of light‐responsive coacervate droplets prepared from mixtures of double‐stranded DNA and an azobenzene cation. The droplets disassemble and reassemble under UV and blue light, respectively, due to azobenzene trans / cis photoisomerisation. Sequestration and release of captured oligonucleotides follow the dynamics of phase separation such that light‐activated transfer, mixing, hybridization, and trafficking of the oligonucleotides can be controlled in binary populations of the droplets. Our results open perspectives for the spatiotemporal control of DNA coacervates and provide a step towards the dynamic regulation of synthetic protocells.