5UEN

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.316 
  • R-Value Work: 0.286 
  • R-Value Observed: 0.288 

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This is version 1.3 of the entry. See complete history


Literature

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: 10.1016/j.cell.2017.01.042
  • Primary Citation of Related Structures:  
    5UEN

  • 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 ...

    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. Electronic address: arthur.christopoulos@monash.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Adenosine receptor A1,Soluble cytochrome b562,Adenosine receptor A1A, B416Homo 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
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
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

  • Method: X-RAY DIFFRACTION
  • 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
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing
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