Crystal structure of the human adenosine A1 receptor A1AR-bRIL in complex with the covalent antagonist DU172 at 3.2A resolution

Experimental Data Snapshot

  • Resolution: 3.20 Å
  • R-Value Free: 0.316 
  • R-Value Work: 0.286 
  • R-Value Observed: 0.288 

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Structure of the Adenosine A1 Receptor Reveals the Basis for Subtype Selectivity.

Glukhova, A.Thal, D.M.Nguyen, A.T.Vecchio, E.A.Jorg, M.Scammells, P.J.May, L.T.Sexton, P.M.Christopoulos, A.

(2017) Cell 168: 867-877.e13

  • DOI: https://doi.org/10.1016/j.cell.2017.01.042
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The adenosine A 1 receptor (A 1 -AR) is a G-protein-coupled receptor that plays a vital role in cardiac, renal, and neuronal processes but remains poorly targeted by current drugs. We determined a 3.2 Å crystal structure of the A 1 -AR bound to the selective covalent antagonist, DU172, and identified striking differences to the previously solved adenosine A 2A receptor (A 2A -AR) structure. Mutational and computational analysis of A 1 -AR revealed a distinct conformation of the second extracellular loop and a wider extracellular cavity with a secondary binding pocket that can accommodate orthosteric and allosteric ligands. We propose that conformational differences in these regions, rather than amino-acid divergence, underlie drug selectivity between these adenosine receptor subtypes. Our findings provide a molecular basis for AR subtype selectivity with implications for understanding the mechanisms governing allosteric modulation of these receptors, allowing the design of more selective agents for the treatment of ischemia-reperfusion injury, renal pathologies, and neuropathic pain.

  • Organizational Affiliation

    Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Adenosine receptor A1,Soluble cytochrome b562,Adenosine receptor A1
A, B
416Homo sapiensEscherichia coliMutation(s): 1 
Gene Names: ADORA1cybC
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Find proteins for P30542 (Homo sapiens)
Explore P30542 
Go to UniProtKB:  P30542
PHAROS:  P30542
GTEx:  ENSG00000163485 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP30542P0ABE7
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on DU1

Download Ideal Coordinates CCD File 
C [auth A],
H [auth B]
4-{[3-(8-cyclohexyl-2,6-dioxo-1-propyl-1,2,6,7-tetrahydro-3H-purin-3-yl)propyl]carbamoyl}benzene-1-sulfonyl fluoride
C24 H30 F N5 O5 S
Query on OLA

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
I [auth B]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
I [auth B],
J [auth B],
K [auth B]
C18 H34 O2
Binding Affinity Annotations 
IDSourceBinding Affinity
DU1 BindingDB:  5UEN Kd: min: 0.27, max: 0.37 (nM) from 4 assay(s)
IC50: 24.9 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 3.20 Å
  • R-Value Free: 0.316 
  • R-Value Work: 0.286 
  • R-Value Observed: 0.288 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.492α = 90
b = 112.96β = 90
c = 124.171γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
Cootmodel building
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP10552134
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP1084246

Revision History  (Full details and data files)

  • Version 1.0: 2017-03-01
    Type: Initial release
  • Version 1.1: 2017-03-15
    Changes: Database references
  • Version 1.2: 2017-09-27
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2020-01-08
    Changes: Author supporting evidence
  • Version 1.4: 2023-10-04
    Changes: Data collection, Database references, Refinement description