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Photocontrolled protein assembly for constructing programmed two-dimensional nanomaterials.

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Researchers developed a light-activated method to create custom-sized, two-dimensional protein nanostructures. This strategy uses photocontrolled covalent crosslinking for precise self-assembly of protein nanomaterials.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Protein Engineering

Background:

  • Protein self-assembly into functional nanomaterials faces challenges due to protein complexity.
  • Mimicking Nature's architectures requires precise control over protein assembly.
  • Developing stimuli-responsive protein nanostructures is crucial for advanced applications.

Purpose of the Study:

  • To present a strategy for creating size-tunable 2D protein nanostructures using light stimuli.
  • To demonstrate remote photocontrol over protein self-assembly.
  • To engineer a protein for light-triggered covalent crosslinking and hierarchical assembly.

Main Methods:

  • Redesigning stable protein one (SP1) with a serine-to-tyrosine mutation (SP1S98Y) via genetic engineering.
  • Utilizing a photosensitizer (Ru(bpy)3^2+) and ammonium persulfate (APS) for oxidative crosslinking under white light.
  • Controlling nanostructure size by adjusting illumination time and assessing thermostability via heat treatment.

Main Results:

  • Successfully formed size-tunable, 2D protein nanosheets through light-induced covalent coupling.
  • Demonstrated precise control over the direction and size of protein assembly.
  • Confirmed excellent thermostability of the resulting periodic 2D protein nanostructures.

Conclusions:

  • Visible light-triggered crosslinking is a facile and eco-friendly method for constructing advanced protein architectures.
  • The developed strategy enables precise hierarchical self-assembly of protein nanomaterials.
  • The thermostable 2D protein nanostructures show potential for nanobiomaterial fabrication.