5N2S

Crystal structure of stabilized A1 receptor in complex with PSB36 at 3.3A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.303 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.256 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structures of Human A1 and A2A Adenosine Receptors with Xanthines Reveal Determinants of Selectivity.

Cheng, R.K.Y.Segala, E.Robertson, N.Deflorian, F.Dore, A.S.Errey, J.C.Fiez-Vandal, C.Marshall, F.H.Cooke, R.M.

(2017) Structure 25: 1275-1285.e4

  • DOI: 10.1016/j.str.2017.06.012
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The adenosine A1 and A2A receptors belong to the purinergic family of G protein-coupled receptors, and regulate diverse functions of the cardiovascular, respiratory, renal, inflammation, and CNS. Xanthines such as caffeine and theophylline are weak, ...

    The adenosine A1 and A2A receptors belong to the purinergic family of G protein-coupled receptors, and regulate diverse functions of the cardiovascular, respiratory, renal, inflammation, and CNS. Xanthines such as caffeine and theophylline are weak, non-selective antagonists of adenosine receptors. Here we report the structure of a thermostabilized human A1 receptor at 3.3 Å resolution with PSB36, an A1-selective xanthine-based antagonist. This is compared with structures of the A2A receptor with PSB36 (2.8 Å resolution), caffeine (2.1 Å), and theophylline (2.0 Å) to highlight features of ligand recognition which are common across xanthines. The structures of A1R and A2AR were analyzed to identify the differences that are important selectivity determinants for xanthine ligands, and the role of T2707.35 in A1R (M2707.35 in A2AR) in conferring selectivity was confirmed by mutagenesis. The structural differences confirmed to lead to selectivity can be utilized in the design of new subtype-selective A1R or A2AR antagonists.


    Organizational Affiliation

    Heptares Therapeutics Ltd, Biopark, Broadwater Road, Welwyn Garden City AL7 3AX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Soluble cytochrome b562,Adenosine receptor A1
A
436Homo sapiensEscherichia coli
This entity is chimeric
Mutation(s): 11 
Gene Names: ADORA1, cybC
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
A1 adenosine receptor
Find proteins for P30542 (Homo sapiens)
Go to Gene View: ADORA1
Go to UniProtKB:  P30542
Find proteins for P0ABE7 (Escherichia coli)
Go to UniProtKB:  P0ABE7
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
8K8
Query on 8K8

Download SDF File 
Download CCD File 
A
1-butyl-3-(3-oxidanylpropyl)-8-[(1~{R},5~{S})-3-tricyclo[3.3.1.0^{3,7}]nonanyl]-7~{H}-purine-2,6-dione
C21 H30 N4 O3
CIBIXJYFYPFMTN-FZUGUKJMSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.303 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.256 
  • Space Group: C 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 70.273α = 90.00
b = 111.658β = 90.00
c = 160.543γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 1.1: 2017-08-09
    Type: Database references