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Related Concept Videos

Antibody Structure01:10

Antibody Structure

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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Related Experiment Video

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Visualizing Low-Abundance Proteins and Post-Translational Modifications in Living Drosophila Embryos via Fluorescent Antibody Injection
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Light activatable antibodies: models for remotely activatable proteins

C H Self1, S Thompson

  • 1Department of Clinical Biochemistry, University of Newcastle upon Tyne, Medical School, UK.

Nature Medicine
|July 1, 1996
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel photochemical method to control protein activity under physiological conditions. This technique uses a modified 2-nitrobenzyl compound to reversibly inactivate and reactivate proteins, enabling precise manipulation of cellular functions.

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Related Experiment Videos

Last Updated: Jun 26, 2026

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Published on: January 19, 2024

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Spatiotemporal Control of Protein Activity through Optogenetic Allosteric Regulation
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Published on: October 4, 2024

Area of Science:

  • Biochemistry
  • Photochemistry
  • Molecular Biology

Background:

  • Remote activation of biological macromolecules is crucial for cellular manipulation and applications.
  • Photochemical methods for controlling molecular interactions often require organic solvents, limiting their physiological applicability.
  • Existing methods for protein inactivation and reactivation are either indirect or lack precise temporal and spatial control.

Purpose of the Study:

  • To develop a widely applicable photochemical method for remote protein activation under physiological conditions.
  • To enable reversible deactivation and subsequent reactivation of existing proteins using light.
  • To demonstrate the modulation of protein-ligand interactions using this novel technique.

Main Methods:

  • Coupling of 1-(2-nitrophenyl)ethanol (NPE), a modified 2-nitrobenzyl alcohol, to proteins using diphosgene.
  • Reversible protein inactivation via NPE modification.
  • Light-induced (UV-A) reactivation of modified proteins.
  • Utilizing antibodies as model systems to demonstrate modulation of binding sites.

Main Results:

  • A simple and effective method for reversibly modifying proteins with NPE was established.
  • Successful deactivation and UV-A-induced reactivation of proteins were achieved under physiological conditions.
  • Demonstrated modulation of antibody-antigen and antibody-Protein A interactions, showcasing the method's utility.

Conclusions:

  • The developed photochemical method allows for precise, remote control over protein activity in a physiological environment.
  • This technique offers a versatile tool for manipulating protein functions, with broad implications for biological research and therapeutic applications.
  • The method successfully modulated key binding interactions in antibody systems, highlighting its potential for controlling biomolecular interactions.