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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...
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...
Antibody Structure and Classes01:25

Antibody Structure and Classes

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.
The basic structure of an antibody consists of four protein chains: two identical heavy chains and two identical light chains. These chains are held together by disulfide bonds and other non-covalent interactions, forming a Y-shaped structure.
The Structure of Intermediate Filaments01:19

The Structure of Intermediate Filaments

The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm).  These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate filaments...
Protein and Protein Structure02:15

Protein and Protein Structure

Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme can...
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...

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A Guide to Production, Crystallization, and Structure Determination of Human IKK1/&#945;
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Structure and function of inter-alpha-trypsin inhibitor heavy chains.

Lisheng Zhuo1, Koji Kimata

  • 1Institute for Molecular Science of Medicine, Aichi Medical University, Nagakute, Aichi, Japan.

Connective Tissue Research
|November 11, 2008
PubMed
Summary

Inter-alpha-trypsin inhibitor (ITF) family proteins contain heavy chains with crucial biological functions, independent of the bikunin light chain. Understanding ITF heavy chain structures and interactions is key to uncovering their roles in health and disease.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Proteomics

Background:

  • Inter-alpha-trypsin inhibitor (ITF) family proteins, found in plasma and urine, consist of bikunin and multiple heavy chains.
  • While bikunin's protease inhibitory activity is well-studied, ITF heavy chains have been largely overlooked.
  • Emerging evidence highlights significant biological roles for heavy chains, both with and without bikunin.

Purpose of the Study:

  • To review the domain structure of ITF heavy chains.
  • To summarize known heavy chain-interacting molecules.
  • To explore the association of heavy chains with various diseases.

Main Methods:

  • Literature review of existing studies on ITF family proteins.
  • Analysis of domain structures and identified interacting partners of heavy chains.
  • Compilation of disease associations linked to heavy chain dysfunctions.

Main Results:

  • ITF heavy chains possess distinct domain structures.
  • Several molecules interacting with heavy chains have been identified.
  • Heavy chains are implicated in the pathogenesis of multiple diseases.

Conclusions:

  • ITF heavy chains are crucial functional components of the ITF protein family.
  • Further research into heavy chain interactions may reveal novel therapeutic targets.
  • Understanding heavy chain functions is essential for advancing ITF protein family research.