Figure 3 - full size

 

Figure 3.
Figure 3. Interactions between gp42 and HLA-DR1(A) Ribbon diagram of the gp42:DR1 complex. gp42 is shown in red, DR1:HA in blue. The N-terminal region of gp42 forms a two-stranded, antiparallel β sheet with a crystallographically related symmetry mate.(B) Interactions formed by DR1 Eβ46 with gp42 residues. The gp42 chain is shown in red and DR1 in blue. Eβ46 forms a salt bridge (R220) and a hydrogen bond (Y107) across the interface, and single point mutations of Eβ46 have been shown to affect EBV entry and gp42 binding.(C) Interactions formed by DR1 Rβ72 with gp42 residues. Chains are colored as in (B). Rβ72 interacts primarily with the backbone atoms of the turn before the first β strand of the gp42 CTLD, including residues 104–107 and with the side chain of Y107. gp42 residues T104 and Y107 interact with both Eβ46 and Rβ72.

The above figure is reprinted by permission from Cell Press: Mol Cell (2002, 9, 375-385) copyright 2002.