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Researchers demonstrate control over artificial biomolecular condensates using DNA nanostars and chemical reactions. This enables dynamic control over condensate formation and dissolution for adaptive molecular organization.

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Area of Science:

  • Biomolecular Engineering
  • Supramolecular Chemistry
  • Synthetic Biology

Background:

  • Artificial biomolecular condensates offer membrane-free molecular organization.
  • Controlling the temporal dynamics of these condensates is crucial for their applications.
  • Designed chemical reactions can potentially modulate condensate behavior.

Purpose of the Study:

  • To investigate if chemical reactions can control the temporal response of artificial biomolecular condensates.
  • To develop a theoretical model linking reaction parameters to condensate dynamics.
  • To experimentally validate the model using DNA nanostar-based condensates.

Main Methods:

  • Developed a theoretical model for phase-separating components in dynamic reactions.
  • Utilized star-shaped DNA motifs (nanostars) to form artificial condensates.
  • Employed DNA strand invasion and displacement reactions for kinetic control.

Main Results:

  • Demonstrated reversible dissolution and growth of DNA condensates via specific DNA inputs.
  • Illustrated transient and equilibrium effects of reactions on condensate response.
  • Characterized the influence of toehold domains, nanostar size, and valency on condensate dynamics.

Conclusions:

  • Chemical reactions can effectively control the temporal behavior of artificial biomolecular condensates.
  • The developed theoretical model accurately predicts condensate response to reaction parameters.
  • This work supports the creation of adaptive artificial condensates with tunable temporal dynamics.