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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 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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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Gene Families01:57

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Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
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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.
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Updated: May 2, 2026

Identification of Mouse and Human Antibody Repertoires by Next-Generation Sequencing
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Data-driven analyses of human antibody variable domain germlines: pairings, sequences and structural features.

Clarissa A Seidler1, Vera A Spanke1, Jakob Gamper1

  • 1Department of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innsbruck, Austria.

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|May 25, 2025
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Summary

Antibody heavy and light chain pairing is not random, as specific amino acid properties influence compatibility and affinity. This finding aids in understanding antibody assembly and designing better therapeutic antibodies.

Keywords:
Antibody pairingVH-VL interfaceantibody assemblydatabase analysisgermline V-gene

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Area of Science:

  • Immunology
  • Structural Biology
  • Bioinformatics

Background:

  • The Observed Antibody Space is a comprehensive resource for paired antibody variable domain sequences.
  • Understanding antibody heavy and light chain pairing is crucial for antibody engineering and therapeutics.

Purpose of the Study:

  • To investigate factors governing antibody heavy and light chain pairing.
  • To challenge the assumption of random pairing and identify key determinants of compatibility and affinity.

Main Methods:

  • Analysis of amino acid conservation, structural features, charge distribution, and interface residue identity in paired antibody sequences.
  • Structural analysis of antibody Fv fragments from the Protein Data Bank (PDB).
  • Development of a novel definition for the VH-VL interface residues.

Main Results:

  • Physicochemical properties of single amino acid residues significantly influence heavy and light chain compatibility and affinity.
  • Structural analyses reveal specific features driving pairing preferences.
  • A new definition for the VH-VL interface has been established based on over 3500 structures.

Conclusions:

  • Antibody heavy and light chain pairing is governed by specific molecular interactions, not random chance.
  • Findings provide insights into antibody assembly and inform the rational design of therapeutic antibodies.
  • A comprehensive characterization of human germlines is provided.