Conformational lability in the class II MHC 310 helix and adjacent extended strand dictate HLA-DM susceptibility and peptide exchange.
Painter, C.A., Negroni, M.P., Kellersberger, K.A., Zavala-Ruiz, Z., Evans, J.E., Stern, L.J.(2011) Proc Natl Acad Sci U S A 108: 19329-19334
- PubMed: 22084083 
- DOI: 10.1073/pnas.1108074108
- Primary Citation of Related Structures:  
3QXD, 3QXA - PubMed Abstract: 
HLA-DM is required for efficient peptide exchange on class II MHC molecules, but its mechanism of action is controversial. We trapped an intermediate state of class II MHC HLA-DR1 by substitution of αF54, resulting in a protein with increased HLA-DM bind ...