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Author Spotlight: Flow Cytometric Determination of Pyroptosis in Avian Cells
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Virus-Based Pyroelectricity.

Han Kim1,2, Kento Okada3,4, Inseok Chae2,3

  • 1Department of Applied Science and Technology, University of California, Berkeley, CA, 94720, USA.

Advanced Materials (Deerfield Beach, Fla.)
|August 23, 2023
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Summary
This summary is machine-generated.

Researchers observed heat-induced electrical potential generation in viruses, demonstrating pyroelectricity in M13 phages. This discovery opens avenues for novel biosensors and bioelectric materials.

Keywords:
bioelectricitybionanotechnologypyroelectricityviruses

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Area of Science:

  • Biophysics
  • Materials Science
  • Nanotechnology

Background:

  • Viruses possess inherent dipole structures due to noncentrosymmetric protein arrangements.
  • Pyroelectricity, the generation of electrical potential from heat, is a property typically observed in inorganic materials.

Purpose of the Study:

  • To investigate the pyroelectric properties of the M13 phage.
  • To demonstrate heat-induced electrical potential generation and detection in a virus.
  • To explore structure-dependent tunable pyroelectric properties of the phage.

Main Methods:

  • Genetic engineering of M13 phage tail protein (pIII) and template-assisted self-assembly for unidirectional polarization.
  • Modification of major coat protein (pVIII) with varying glutamate residues.
  • Computational modeling and circular dichroism (CD) spectroscopy analysis.

Main Results:

  • The M13 phage exhibits pyroelectric properties, with the most polarized phage showing a coefficient of 0.13 µC m⁻² °C⁻¹.
  • Heat-induced unfolding of α-helices in pVIII proteins correlates with changes in phage polarization.
  • Genetically modified phages demonstrate pyroelectric function in diverse chemical environments.

Conclusions:

  • The study presents the first observation of pyroelectricity in a virus.
  • This phage-based approach offers insights into bio-pyroelectricity and viral particle detection.
  • Potential applications include novel biomaterials for biosensors and bioelectric devices.