Related Experiment Video

Updated: Jul 11, 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

Identification of the HLA-DM/HLA-DR interface

Matthew N Davies1, Abigail Lamikanra, Clare E Sansom

  • 1Edward Jenner Institute, Nuffield Department of Clinical Medicine, John Radcliffe Hospital, University of Oxford, Headley Way, Headington, Oxford OX3 9DU, UK.

Molecular Immunology
|September 18, 2007
PubMed

Insights

Human leukocyte antigen (HLA)-DM acts as a peptide editor in antigen presentation. This study identifies a specific interaction site between HLA-DM and MHC Class II molecules using computational methods.

Area of Science:

  • Immunology
  • Molecular Biology
  • Structural Biology

Background:

  • Human leukocyte antigen (HLA)-DM is crucial for antigen presentation.
  • HLA-DM catalyzes the release of CLIP from MHC Class II molecules.
  • Its precise interaction site with MHC Class II remains unidentified.

Purpose of the Study:

  • To pinpoint the interaction interface between HLA-DM and MHC Class II.
  • To investigate the 'peptide editor' hypothesis of HLA-DM function.
  • To propose a mechanism for peptide dissociation.

Main Methods:

  • Integration of existing mutational data.
  • Molecular docking simulations.
  • Energy minimization simulations.

Main Results:

  • A putative interaction site of >4000A2 was identified.
  • The identified site aligns with known point mutational data for DR and DM.
  • The docked structure was validated against experimental data.

Conclusions:

  • A specific interaction site for HLA-DM on MHC Class II was proposed.
  • The findings support HLA-DM's role in peptide editing.
  • An acidic cluster near the N-terminus of the bound peptide suggests a dissociation mechanism.

More Related Videos

Personalized Peptide Arrays for Detection of HLA Alloantibodies in Organ Transplantation08:07

Personalized Peptide Arrays for Detection of HLA Alloantibodies in Organ Transplantation

Published on: September 6, 2017

Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix10:37

Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix

Published on: October 20, 2021

Related Concept Videos

Tissue Transplantation01:24

Tissue Transplantation

Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
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.