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Updated: Aug 15, 2026

Immunopeptidomics: Isolation of Mouse and Human MHC Class I- and II-Associated Peptides for Mass Spectrometry Analysis
Published on: October 15, 2021
The murine diabetogenic class II histocompatibility molecule I-Ag7: structural and functional properties and
1Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.
Abstract:
The onset of type 1 diabetes mellitus (T1DM) is directly linked to the expression of class II MHC molecules. The NOD mouse, which is an excellent animal model for the human disease, expresses the I-Ag7 molecule that shares many features with the human diabetogenic class II MHC alleles. In this review, the structural, biochemical, and biological properties of the I-Ag7 molecules and how they relate to onset of diabetes is discussed. In particular, the focus is on the unique properties of peptide selection by I-Ag7 that reveal the preferred binding motif of diabetogenic MHC molecules and its role in display of peptides derived from islet beta cells.
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