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Assembling Molecular Shuttles Powered by Reversibly Attached Kinesins
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Reversible self-assembly of superstructured networks.

Ronit Freeman1, Ming Han2, Zaida Álvarez1

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|October 6, 2018
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Scientists created dynamic hydrogels using peptide-DNA conjugates that reversibly assemble and disassemble. These smart materials respond to molecular signals and changing charge density, offering new possibilities for soft robotics and regenerative medicine.

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Area of Science:

  • Materials Science
  • Biotechnology
  • Supramolecular Chemistry

Background:

  • Nature utilizes reversible noncovalent interactions for dynamic soft material organization.
  • Synthetic materials struggle to replicate this dynamic assembly and disassembly capability.

Purpose of the Study:

  • To engineer synthetic hydrogels with reversible self-assembly and disassembly functionalities.
  • To investigate the molecular mechanisms driving the dynamic behavior of these hydrogels.

Main Methods:

  • Fabrication of hydrogels from peptide-DNA conjugates and peptides.
  • Experimental characterization of hydrogel superstructure formation and disassembly.
  • Molecular dynamics simulations to understand structure-property relationships.

Main Results:

  • Hydrogels formed reversible superstructures of intertwined filaments.
  • Disassembly was triggered by molecular addition or changes in charge density.
  • Response required large-scale molecular redistribution driven by noncovalent interactions.
  • Reversible structural changes correlated with reversible changes in neural cell phenotype.

Conclusions:

  • Demonstrated a novel class of dynamic hydrogels with tunable self-assembly.
  • Highlighted the critical role of supramolecular cohesive energy in reversible structures.
  • Showcased potential applications in responsive biomaterials and cell culture platforms.