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Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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A generalizable nanopore sensor for highly specific protein detection at single-molecule precision.

Mohammad Ahmad1, Jeung-Hoi Ha2, Lauren A Mayse1,3

  • 1Department of Physics, Syracuse University, 201 Physics Building, Syracuse, NY, 13244-1130, USA.

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Researchers developed a novel nanopore sensor using programmable binders for specific protein detection. This innovation enhances molecular diagnostics and biomarker discovery in biofluids.

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Area of Science:

  • Biophysics
  • Molecular Diagnostics
  • Nanotechnology

Background:

  • Protein detection is crucial for molecular diagnostics, with nanopore technology showing promise.
  • Existing nanopore methods face challenges with steric hindrance, limiting specific protein interface implementation.
  • Developing specific, sensitive, and architecture-preserving protein detection methods is essential.

Purpose of the Study:

  • To engineer a modular nanopore sensor with programmable antibody-mimetic binders for specific protein detection.
  • To overcome steric hindrance issues in nanopore-based protein analytics.
  • To demonstrate the versatility of this approach for diverse protein analytes.

Main Methods:

  • Formulation of sensing elements by fusing programmable antibody-mimetic binders to monomeric protein nanopores.
  • Development and validation of nanopore sensors for protein analytes with varying size, charge, and complexity.
  • Analysis of unique electrical signatures generated by binder-analyte interactions at the nanopore tip.

Main Results:

  • Successful creation of a modular nanopore sensor system.
  • Demonstrated detection of diverse protein analytes with high specificity and sensitivity.
  • Observed unique electrical signatures correlating with protein identity, quantity, and binding interactions.

Conclusions:

  • The programmable binder-nanopore fusion offers a versatile platform for protein detection.
  • This modular design preserves nanopore sensor architecture, specificity, and sensitivity.
  • The approach provides a foundation for advanced biomarker detection in biofluids for biomedical diagnostics.