Crystal structure of I-Ak in complex with a dominant epitope of lysozyme.
Fremont, D.H., Monnaie, D., Nelson, C.A., Hendrickson, W.A., Unanue, E.R.(1998) Immunity 8: 305-317
- PubMed: 9529148 
- DOI: 10.1016/s1074-7613(00)80536-1
- Primary Citation of Related Structures:  
1IAK - PubMed Abstract: 
We have determined the structure of murine MHC class II I-Ak in complex with a naturally processed peptide from hen egg lysozyme (HEL residues 50-62) at 1.9 A resolution. These results provide a structural basis for the I-Ak peptide-binding motif. Binding is established by the deep burial of five anchor side chains into specific pockets of the I-Ak binding groove, with a zen-like fit of an aspartic acid in the P1 pocket ...