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Related Concept Videos

Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

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Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
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Antibody Structure01:10

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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
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Antibody Structure and Classes01:25

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Antibodies, also known as immunoglobulins, are produced by B cells in response to foreign substances, such as bacteria and viruses. These proteins are critical for recognizing and neutralizing these substances, protecting the body from potential harm.
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Conserved Binding Sites01:49

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
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Updated: Jul 1, 2025

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
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AbFlex: designing antibody complementarity determining regions with flexible CDR definition.

Woosung Jeon1, Dongsup Kim1

  • 1Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.

Bioinformatics (Oxford, England)
|March 7, 2024
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Summary

A new antibody design model, AbFlex, improves antibody therapeutics by accurately predicting structures and enhancing antigen binding. This model utilizes advanced neural networks and data augmentation for superior performance in antibody design.

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Area of Science:

  • Biotechnology
  • Immunology
  • Computational Biology

Background:

  • Antibodies are crucial proteins for immune response and therapeutic development.
  • Designing antibodies with specific antigen-binding capabilities is essential for effective therapeutics.
  • Complementarity Determining Regions (CDRs) are key to antibody-antigen recognition.

Purpose of the Study:

  • To develop an advanced antibody design model, AbFlex.
  • To enhance structure prediction accuracy and amino acid recovery in antibody design.
  • To improve the binding energy of designed antibodies compared to wild types.

Main Methods:

  • Developed AbFlex, an antibody design model.
  • Employed an equivariant graph neural network for data efficiency.
  • Implemented a novel data augmentation strategy with flexible CDR definition.

Main Results:

  • AbFlex demonstrates state-of-the-art performance in structure prediction and amino acid recovery.
  • Over 38% of designed antibodies show improved binding energies.
  • The model effectively overcomes challenges posed by limited antibody-antigen complex data.

Conclusions:

  • AbFlex represents a significant advancement in antibody design.
  • The model's strategies enhance prediction accuracy and binding affinity.
  • AbFlex has the potential to accelerate the development of novel antibody therapeutics.