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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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Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
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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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Globular Proteins01:27

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In organisms, proteins are the most abundant macromolecules. They act as the building blocks of life and play various crucial roles in the body. Proteins can be broadly classified into two distinct subtypes based on their shape and solubilities: globular proteins and fibrous proteins.
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Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
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Differential Scanning Calorimetry &#8212; A Method for Assessing the Thermal Stability and Conformation of Protein Antigen
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Differential Scanning Calorimetry — A Method for Assessing the Thermal Stability and Conformation of Protein Antigen

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Thermodynamic stability contributes to immunoglobulin specificity.

Jordan D Dimitrov1, Srinivas V Kaveri1, Sébastien Lacroix-Desmazes1

  • 1INSERM, U1138, Centre de Recherche des Cordeliers, Paris, France; Université Paris Descartes, UMRS 1138, Paris, France; Université Pierre et Marie Curie (UPMC)-Paris 6, URMS 1138, Paris, France.

Trends in Biochemical Sciences
|April 2, 2014
PubMed
Summary
This summary is machine-generated.

Antibody specificity is crucial for immune defense. This study links antibody specificity to thermodynamic stability, distinguishing between highly specific and broadly binding antibodies.

Keywords:
conformational dynamismimmunoglobulinsinteraction promiscuitythermodynamic stability

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Area of Science:

  • Immunology
  • Biochemistry
  • Evolutionary Biology

Background:

  • Immunoglobulin antigen-binding specificity is vital for immune defense.
  • A significant portion of immune repertoires exhibits promiscuous binding, with poorly understood physicochemical underpinnings.
  • Antibody specificity evolves via affinity maturation, involving mutation and selection.

Purpose of the Study:

  • To investigate the physicochemical basis of antibody specificity and promiscuous binding.
  • To propose a link between antibody specificity and the thermodynamic stability of antigen-binding regions.
  • To provide a quantitative method for distinguishing between specific and promiscuous antibodies.

Main Methods:

  • Literature review integrating data on immunoglobulin evolution and enzyme activity evolution.
  • Theoretical framework proposing a link between thermodynamic stability and binding specificity.
  • Analysis of existing data on somatic mutations and their impact on immunoglobulin stability.

Main Results:

  • Somatic mutations can negatively impact the thermodynamic stability of immunoglobulin variable regions.
  • Thermodynamic stability of antigen-binding regions offers a quantitative distinction between specific and promiscuous antibodies.
  • This stability-specificity link provides a novel perspective on antibody repertoire composition.

Conclusions:

  • Antibody specificity is quantitatively linked to the thermodynamic stability of antigen-binding regions.
  • Thermodynamic stability serves as a key factor in differentiating between highly specific and promiscuous antibodies.
  • Understanding this relationship advances knowledge of immune repertoire evolution and antibody function.