8A2J

human STING in complex with 2'-3'-cyclic-GMP-7-deaza(4-biphenylyl)-AMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Design, Synthesis, and Biochemical and Biological Evaluation of Novel 7-Deazapurine Cyclic Dinucleotide Analogues as STING Receptor Agonists.

Vavrina, Z.Perlikova, P.Milisavljevic, N.Chevrier, F.Smola, M.Smith, J.Dejmek, M.Havlicek, V.Budesinsky, M.Liboska, R.Vanekova, L.Brynda, J.Boura, E.Rezacova, P.Hocek, M.Birkus, G.

(2022) J Med Chem 65: 14082-14103

  • DOI: https://doi.org/10.1021/acs.jmedchem.2c01305
  • Primary Citation of Related Structures:  
    8A2H, 8A2I, 8A2J, 8A2K

  • PubMed Abstract: 

    Cyclic dinucleotides (CDNs) are second messengers that activate stimulator of interferon genes (STING). The cGAS-STING pathway plays a promising role in cancer immunotherapy. Here, we describe the synthesis of CDNs containing 7-substituted 7-deazapurine moiety. We used mouse cyclic GMP-AMP synthase and bacterial dinucleotide synthases for the enzymatic synthesis of CDNs. Alternatively, 7-(het)aryl 7-deazapurine CDNs were prepared by Suzuki-Miyaura cross-couplings. New CDNs were tested in biochemical and cell-based assays for their affinity to human STING. Eight CDNs showed better activity than 2'3'- c GAMP, the natural ligand of STING. The effect on cytokine and chemokine induction was also evaluated. The best activities were observed for CDNs bearing large aromatic substituents that point above the CDN molecule. We solved four X-ray structures of complexes of new CDNs with human STING. We observed π-π stacking interactions between the aromatic substituents and Tyr240 that are involved in the stabilization of CDN-STING complexes.


  • Organizational Affiliation

    Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Namesti 542, Prague 166 10, Czech Republic.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Stimulator of interferon genes protein
A, B
241Homo sapiensMutation(s): 1 
Gene Names: STING1ERISMITASTINGTMEM173
UniProt & NIH Common Fund Data Resources
Find proteins for Q86WV6 (Homo sapiens)
Explore Q86WV6 
Go to UniProtKB:  Q86WV6
PHAROS:  Q86WV6
GTEx:  ENSG00000184584 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ86WV6
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
KWO (Subject of Investigation/LOI)
Query on KWO

Download Ideal Coordinates CCD File 
C [auth B]2-azanyl-9-[(1~{R},6~{R},8~{R},9~{R},10~{S},15~{R},17~{R},18~{R})-8-[4-azanyl-5-(4-phenylphenyl)pyrrolo[2,3-d]pyrimidin-7-yl]-3,9,12,18-tetrakis(oxidanyl)-3,12-bis(oxidanylidene)-2,4,7,11,13,16-hexaoxa-3$l^{5},12$l^{5}-diphosphatricyclo[13.2.1.0^{6,10}]octadecan-17-yl]-1~{H}-purin-6-one
C33 H33 N9 O13 P2
KGCQPNZLZFAINN-YHOFCQOESA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
KWO BindingDB:  8A2J EC50: min: 13, max: 2950 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.29α = 90
b = 116.91β = 90
c = 35.98γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Regional Development FundEuropean UnionCZ.02.1.01/0.0/0.0/16_019/0000729

Revision History  (Full details and data files)

  • Version 1.0: 2022-10-12
    Type: Initial release
  • Version 1.1: 2022-10-19
    Changes: Database references
  • Version 1.2: 2022-11-09
    Changes: Database references
  • Version 1.3: 2024-01-31
    Changes: Data collection, Refinement description