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Related Concept Videos

Antibody Structure01:10

Antibody Structure

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Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
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Antibody Nanotweezer Constructing Bivalent Transistor-Biomolecule Interface with Spatial Tolerance.

Xuejun Wang1,2, Hua Kang1,2, Keke Huang3

  • 1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.

Nano Letters
|March 21, 2024
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Researchers developed an antibody nanotweezer for robust bioelectronic interfaces. This innovation enhances signal transduction for pathogen detection, improving bio-electronic system capabilities.

Keywords:
Antibody nanotweezerbiointerfacebivalent bindingspatial tolerancetransistor

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Area of Science:

  • Bioelectronic Systems
  • Nanotechnology
  • Molecular Engineering

Background:

  • Establishing multivalent interfaces between biological systems and electronic devices is crucial for intelligent bioelectronic systems.
  • Achieving nanoscale multivalent binding with spatial tolerance presents a significant challenge in biointerfacing.
  • Current methods often lack the necessary adaptability and binding strength for robust bioelectronic integration.

Purpose of the Study:

  • To engineer a novel multivalent interface for enhanced bioelectronic system performance.
  • To develop a self-adaptive bivalent nanobody capable of strong and resilient binding at biointerfaces.
  • To demonstrate the application of this technology in sensitive pathogen detection.

Main Methods:

  • Construction of an antibody nanotweezer using a DNA framework.
  • Nanoscale patterning of nanobodies with local spatial adaptivity for simultaneous epitope recognition.
  • Integration of the antibody nanotweezer with transistor technology for signal transduction.
  • Application in detecting clinical pathogens and comparison with Polymerase Chain Reaction (PCR) results.

Main Results:

  • The antibody nanotweezer demonstrated a 10-fold increase in binding affinity compared to monovalent antibodies.
  • Simultaneous recognition of target epitopes was achieved without inducing binding stress.
  • The nanotweezer-based transistor system showed enhanced signal transduction capabilities.
  • Detection of clinical pathogens yielded approximately 100% overall agreement with PCR results.

Conclusions:

  • The antibody nanotweezer provides a robust and adaptive multivalent interface for bioelectronic applications.
  • This technology significantly improves binding affinity and signal transduction at the bioelectronic interface.
  • The developed system shows high accuracy in pathogen detection, offering a promising alternative to PCR.
  • This work paves the way for advancements in organoid intelligence on a chip and other bioelectronic devices.