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Related Concept Videos

Conserved Binding Sites01:49

Conserved Binding Sites

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.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Antigen Processing Pathways01:31

Antigen Processing Pathways

MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...

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Related Experiment Video

Updated: Jul 5, 2026

A High Throughput MHC II Binding Assay for Quantitative Analysis of Peptide Epitopes
07:59

A High Throughput MHC II Binding Assay for Quantitative Analysis of Peptide Epitopes

Published on: March 25, 2014

A practical guide to structure-based prediction of MHC-binding peptides.

Shoba Ranganathan1, Joo Chuan Tong

  • 1Department of Chemistry, Macquarie University, New South Wales, Australia.

Methods in Molecular Biology (Clifton, N.J.)
|May 3, 2008
PubMed
Summary

Understanding how peptides bind to Major Histocompatibility Complex (MHC) molecules is key for immune responses. This study uses structural models to predict peptide-MHC binding, aiding in immune system research.

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Immunopeptidomics: Isolation of Mouse and Human MHC Class I- and II-Associated Peptides for Mass Spectrometry Analysis
09:32

Immunopeptidomics: Isolation of Mouse and Human MHC Class I- and II-Associated Peptides for Mass Spectrometry Analysis

Published on: October 15, 2021

Area of Science:

  • Immunology and Structural Biology
  • Computational Biology and Bioinformatics

Background:

  • Major Histocompatibility Complex (MHC) molecules are crucial for adaptive immunity.
  • Peptide binding to MHC is essential for T-cell activation but remains a complex theoretical challenge.
  • Understanding peptide-MHC interactions is vital for developing targeted immunotherapies.

Purpose of the Study:

  • To introduce structural models as a predictive tool for peptide-MHC binding.
  • To assess the utility of geometric and energetic complementarity in predicting binding affinity.
  • To provide a method for determining peptide sequence compatibility with specific MHC alleles.

Main Methods:

  • Utilizing structural modeling to analyze peptide-MHC interactions.
  • Evaluating geometric and energetic factors influencing complex stability.
  • Developing a predictive framework based on structural information.

Main Results:

  • Structural models offer a valuable approach to predict peptide binding to MHC molecules.
  • Geometric and energetic complementarity are key determinants of peptide-MHC complex stability.
  • The proposed method facilitates the assessment of peptide sequence suitability for specific MHC alleles.

Conclusions:

  • Structural modeling provides a powerful predictive method for peptide-MHC interactions.
  • This approach enhances our understanding of immune response mechanisms.
  • The findings support the development of structure-based strategies in immunology and drug discovery.