Table 4.
Observed binding patterns for ligands and their phosphate groups. P1 (P2) is the glycosidic (ester)-bound HPO4- on glucosamine GlcN1 (GlcN2) of the ligand backbone.
| Effector activity | Complex | Orientation | Phosphate binding according to Figure 3 in [6]. | Ref and PDB Code |
|---|---|---|---|---|
| Agonist | (hTLR4/hMD-2/LPS)2 | “normal” | P1 in Pag (uppermost corner of the wedge); | [18] |
| P2 in Pag-Pan (rightmost corner of the wedge). | 3FXI | |||
| Antagonist | (hTLR4/hMD-2/LipidIVa) | flipped | P2 in Pan (leftmost corner of the wedge); | [32] |
| P1 in Pag-Pan (rightmost corner of the wedge). | 2E59 | |||
| Antagonist | (hMD-2/Eritoran) | flipped | P2 in Pan (leftmost corner of the wedge); | [19] |
| P1 in Pag-Pan (rightmost corner of the wedge). | 2Z65 | |||
| Unclear | (chicken MD-1/LipidIVa) | “normal” | P1 near Pag (uppermost corner of the wedge); | [22] |
| P2 near Pag-Pan (rightmost corner of the wedge). | 3MU3 |