H2-M (HLA-DM in humans) resides in an acidic endosomal compartment, where it facilitates the loading of antigenic peptides into the peptide- binding groove of class II MHC. The crystal structure of a soluble form of H2-M has been solved to 3.1 Å, resolution, revealing a heterodimer with structural similarities to the MHC family of proteins. In contrast to its antigen-presenting cousins, the membrane distal α helices of H2-M pack closely together, occluding most of the binding groove except for a single large pocket near the center. The structure of H2-M has several unique features that may play a role in its function as a molecular chaperone and peptide exchange factor.

Original languageEnglish
Pages (from-to)385-393
Number of pages9
Issue number3
StatePublished - Sep 1998


Dive into the research topics of 'Crystal structure of mouse H2-M'. Together they form a unique fingerprint.

Cite this