Molecule of the Month: PD-1 (Programmed Cell Death Protein 1)
PD-1 and its ligands are a new target for cancer therapy
Inhibiting Immune Response
Exploring the Structure
PD-L1 and Inhibitor
Researchers are also trying to find small molecules that can be used to block the interaction between PD-1 and its ligand proteins. One of the first successes is shown here, the molecule BMS-202 (PDB entry 5j89). It binds to PD-L1, causing it to dimerize. This blocks the site that normally binds to PD-1, as seen in the complex of human PD-1 with PD-L1 (PDB entry 4zqk). To compare these structures in more detail, click on the image for an interactive JSmol.
Topics for Further Discussion
- You can use the Protein Feature View to see which portions of these molecules are included in the PDB entries—for instance, look at the entry for mouse PD-1.
- You can use the NGL viewer to explore the interaction of ligands with proteins—for instance, look at the interaction of BMS-202 with PD-L1.
December 2016, David Goodselldoi:10.2210/rcsb_pdb/mom_2016_12