Figure 2

Cartoon representation of the 3D structure of EPCR-PTY complex. PTY ligand and EPCR residues involved in interaction, target of saturation mutagenesis, are shown in sticks. Carbon atoms are in green for the ligand, in orange for residues located on α-helices H1, H2 and H3, in cyan for residues of the eight-stranded β-sheet floor and in yellow for the loop residue. In red, the H-bond between Arg156 and the polar group of PTY. Figure is drawn with Pymol (DeLano Scientific, San Carlos, CA, USA).