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Related Concept Videos

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...
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.
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial precursors...

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Related Experiment Video

Updated: May 15, 2026

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

Establishing MHC class I peptide motifs.

Nico Trautwein1, Stefan Stevanović2

  • 1Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, Tübingen, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|January 19, 2013
PubMed
Summary

Predicting Major histocompatibility complex (MHC) class I peptide motifs aids in identifying T-cell epitopes crucial for disease research. This study details establishing reliable peptide motifs and scoring matrices for accurate epitope prediction, exemplified by HLA-B*35.

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Area of Science:

  • Immunology
  • Computational Biology
  • Bioinformatics

Background:

  • Major histocompatibility complex (MHC) class I peptide motifs are essential for identifying T-cell epitopes.
  • Epitope prediction using these motifs is a primary method for discovering disease-associated epitopes.
  • The majority of T-cell epitopes identified in the last 20 years were found via prediction.

Purpose of the Study:

  • To outline the methodology for establishing MHC class I peptide motifs.
  • To detail the process of creating a dependable scoring matrix for epitope prediction.
  • To develop a specific scoring matrix for predicting HLA-B*35-presented T-cell epitopes.

Main Methods:

  • Analysis of naturally presented HLA ligands.
  • Characterization of peptide binding specificities.
  • Development of scoring matrices based on motif analysis.

Main Results:

  • Established a systematic approach for MHC class I peptide motif generation.
  • Composed a reliable scoring matrix for T-cell epitope prediction.
  • Successfully developed an example scoring matrix for HLA-B*35.

Conclusions:

  • The described steps provide a robust framework for MHC class I peptide motif establishment.
  • Reliable scoring matrices enhance the accuracy of T-cell epitope prediction for immunological studies.
  • This methodology facilitates the identification of disease-relevant epitopes, advancing fields like vaccinology and immunotherapy.