Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 57.43 kDa 
• Atom Count: 3,528 
• Modelled Residue Count: 388 
• Deposited Residue Count: 433 
• Unique protein chains: 1

 5N2R

Crystal structure of stabilized A2A adenosine receptor A2AR-StaR2-bRIL in complex with PSB36 at 2.8A resolution

• PDB DOI:  https://doi.org/10.2210/pdb5N2R/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens, Escherichia coli
• Expression System: Trichoplusia ni
• Mutation(s): Yes 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 2017-02-08 Released: 2017-07-26 
• Deposition Author(s): 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.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.229 
• R-Value Work: 0.188 
• R-Value Observed: 0.190 

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

• PubMed: 28712806 
• DOI: https://doi.org/10.1016/j.str.2017.06.012
• Primary Citation of Related Structures:  
  5MZJ, 5MZP, 5N2R, 5N2S


• PubMed Abstract: 
  

The adenosine A ₁ and A _2A 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 A ₁ receptor at 3.3 Å resolution with PSB36, an A ₁ -selective xanthine-based antagonist. This is compared with structures of the A _2A 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 A ₁ R and A _2A R were analyzed to identify the differences that are important selectivity determinants for xanthine ligands, and the role of T270 ^7.35 in A ₁ R (M270 ^7.35 in A _2A R) 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 A ₁ R or A _2A R antagonists.

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Organizational Affiliation: 

Heptares Therapeutics Ltd, Biopark, Broadwater Road, Welwyn Garden City AL7 3AX, UK. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Adenosine receptor A2a,Soluble cytochrome b562,ADENOSINE RECEPTOR A2A SOLUBLE CYTOCHROME B562 ADENOSINE RECEPTOR A2A,Adenosine receptor A2a	A	433	Homo sapiens, Escherichia coli	Mutation(s): 11  Gene Names: ADORA2A, ADORA2, cybC Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
Find proteins for P29274 (Homo sapiens) Explore P29274  Go to UniProtKB:  P29274
PHAROS:  P29274
UniProt Groups	P0ABE7P29274

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CLR	D [auth A], E [auth A], F [auth A]	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N
8JN	C [auth A]	1-butyl-3-[(~{E})-3-oxidanylprop-1-enyl]-8-[(1~{R},5~{S})-3-tricyclo[3.3.1.0^{3,7}]nonanyl]-7~{H}-purine-2,6-dione C21 H28 N4 O3 BPTHCTUXQADTJT-ZKQWZTGNSA-N
OLC	BA [auth A], CA [auth A], DA [auth A], EA [auth A], FA [auth A]	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate C21 H40 O4 RZRNAYUHWVFMIP-GDCKJWNLSA-N
OLA	AA [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], L [auth A], M [auth A], N [auth A], O [auth A], P [auth A], Q [auth A], R [auth A], S [auth A], T [auth A], U [auth A], V [auth A], W [auth A], X [auth A], Y [auth A], Z [auth A]	OLEIC ACID C18 H34 O2 ZQPPMHVWECSIRJ-KTKRTIGZSA-N
TAR	GA [auth A]	D(-)-TARTARIC ACID C4 H6 O6 FEWJPZIEWOKRBE-LWMBPPNESA-N
NA	B [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.229 
• R-Value Work: 0.188 
• R-Value Observed: 0.190 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.254	α = 90
b = 180.739	β = 90
c = 140.641	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2017-07-26 
Deposition Author(s): 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.

Revision History  

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