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Timed material self-assembly controlled by circadian clock proteins.

Gregor Leech1, Lauren Melcher2, Michelle Chiu3

  • 1Department of Physics and Biophysics, University of San Diego, San Diego, California 92110, United States.

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|March 13, 2023
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Summary
This summary is machine-generated.

Researchers engineered synthetic materials with programmable, life-like behaviors using biological clock proteins. This innovation enables autonomous regulation of material properties through time-dependent crosslinking, opening new avenues in material science.

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Area of Science:

  • Biomaterials Engineering
  • Synthetic Biology
  • Materials Science

Background:

  • Active biological molecules offer significant potential for autonomous regulation in synthetic materials.
  • Harnessing biological systems can introduce complex, life-like behaviors into synthetic materials.
  • Circadian clock proteins provide robust mechanisms for regulating chemical reactions in time and space.

Approach:

  • Engineered time-dependent crosslinking of colloids using functionalized circadian clock proteins, KaiB and KaiC.
  • Investigated the dependence of colloid crosslinking on the phosphorylation state of KaiC and KaiB-KaiC complexing kinetics.
  • Utilized microscopic imaging and computational modeling to analyze colloidal super-structure stability.

Key Points:

  • Material self-assembly exhibits programmable kinetics driven by molecular assembly of KaiB-KaiC complexes.
  • Colloid crosslinking is strictly controlled by KaiC phosphorylation state, synchronized with KaiB-KaiC complexing.
  • Colloidal super-structure stability is sensitive to the number of Kai complexes per connection, enabling tunable material responses.

Conclusions:

  • Demonstrated the concept of using biological timers to control synthetic materials.
  • Protein-based reaction networks can endow synthetic systems with life-like functional properties.
  • This approach opens new possibilities for creating responsive and adaptive materials.