Structure of human Programmed cell death 1 ligand 1 (PD-L1) with low molecular mass inhibitor

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.244 

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This is version 1.2 of the entry. See complete history


Terphenyl-Based Small-Molecule Inhibitors of Programmed Cell Death-1/Programmed Death-Ligand 1 Protein-Protein Interaction.

Muszak, D.Surmiak, E.Plewka, J.Magiera-Mularz, K.Kocik-Krol, J.Musielak, B.Sala, D.Kitel, R.Stec, M.Weglarczyk, K.Siedlar, M.Domling, A.Skalniak, L.Holak, T.A.

(2021) J Med Chem 64: 11614-11636

  • DOI: https://doi.org/10.1021/acs.jmedchem.1c00957
  • Primary Citation of Related Structures:  
    6R3K, 7NLD

  • PubMed Abstract: 

    We describe a new class of potent PD-L1/PD-1 inhibitors based on a terphenyl scaffold that is derived from the rigidified biphenyl-inspired structure. Using in silico docking, we designed and then experimentally demonstrated the effectiveness of the terphenyl-based scaffolds in inhibiting PD-1/PD-L1 complex formation using various biophysical and biochemical techniques. We also present a high-resolution structure of the complex of PD-L1 with one of our most potent inhibitors to identify key PD-L1/inhibitor interactions at the molecular level. In addition, we show the efficacy of our most potent inhibitors in activating the antitumor response using primary human immune cells from healthy donors.

  • Organizational Affiliation

    Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7a, 30-387 Kraków, Poland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Programmed cell death 1 ligand 1128Homo sapiensMutation(s): 0 
Gene Names: CD274B7H1PDCD1L1PDCD1LG1PDL1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NZQ7 (Homo sapiens)
Explore Q9NZQ7 
Go to UniProtKB:  Q9NZQ7
GTEx:  ENSG00000120217 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NZQ7
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
UGZ (Subject of Investigation/LOI)
Query on UGZ

Download Ideal Coordinates CCD File 
G [auth A],
H [auth D],
I [auth E]
C25 H27 Cl N2 O5 S
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.244 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.087α = 90
b = 75.255β = 96.29
c = 74.354γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-11
    Type: Initial release
  • Version 1.1: 2021-08-25
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Refinement description