2.35-Angstrom In situ Mylar structure of human A2A adenosine receptor at 100 K

Experimental Data Snapshot

  • Resolution: 2.35 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

wwPDB Validation   3D Report Full Report

Ligand Structure Quality Assessment 

This is version 1.3 of the entry. See complete history


High-throughput in situ X-ray screening of and data collection from protein crystals at room temperature and under cryogenic conditions.

Broecker, J.Morizumi, T.Ou, W.L.Klingel, V.Kuo, A.Kissick, D.J.Ishchenko, A.Lee, M.Y.Xu, S.Makarov, O.Cherezov, V.Ogata, C.M.Ernst, O.P.

(2018) Nat Protoc 13: 260-292

  • DOI: https://doi.org/10.1038/nprot.2017.135
  • Primary Citation of Related Structures:  
    5VRA, 5WJK, 5WKT

  • PubMed Abstract: 

    Protein crystallography has significantly advanced in recent years, with in situ data collection, in which crystals are placed in the X-ray beam within their growth medium, being a major point of focus. In situ methods eliminate the need to harvest crystals, a previously unavoidable drawback, particularly for often small membrane-protein crystals. Here, we present a protocol for the high-throughput in situ X-ray screening of and data collection from soluble and membrane-protein crystals at room temperature (20-25°C) and under cryogenic conditions. The Mylar in situ method uses Mylar-based film sandwich plates that are inexpensive, easy to make, and compatible with automated imaging, and that show very low background scattering. They support crystallization in microbatch and vapor-diffusion modes, as well as in lipidic cubic phases (LCPs). A set of 3D-printed holders for differently sized patches of Mylar sandwich films makes the method robust and versatile, allows for storage and shipping of crystals, and enables automated mounting at synchrotrons, as well as goniometer-based screening and data collection. The protocol covers preparation of in situ plates and setup of crystallization trials; 3D printing and assembly of holders; opening of plates, isolation of film patches containing crystals, and loading them onto holders; basic screening and data-collection guidelines; and unloading of holders, as well as reuse and recycling of them. In situ plates are prepared and assembled in 1 h; holders are 3D-printed and assembled in ≤90 min; and an in situ plate is opened, and a film patch containing crystals is isolated and loaded onto a holder in 5 min.

  • Organizational Affiliation

    Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Adenosine receptor A2a,Soluble cytochrome b562 chimera447Homo sapiensEscherichia coliMutation(s): 3 
Gene Names: ADORA2AADORA2cybC
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
GTEx:  ENSG00000128271 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP0ABE7P29274
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on CLR

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
F [auth A]
C27 H46 O
Query on OLB

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W [auth A](2S)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
C21 H40 O4
Query on OLC

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G [auth A]
H [auth A]
I [auth A]
J [auth A]
K [auth A]
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A]
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
C21 H40 O4
Query on ZMA

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B [auth A]4-{2-[(7-amino-2-furan-2-yl[1,2,4]triazolo[1,5-a][1,3,5]triazin-5-yl)amino]ethyl}phenol
C16 H15 N7 O2
Query on OLA

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M [auth A]
N [auth A]
O [auth A]
P [auth A]
Q [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]
C18 H34 O2
Query on NA

Download Ideal Coordinates CCD File 
Binding Affinity Annotations 
IDSourceBinding Affinity
ZMA BindingDB:  5VRA Ki: min: 0.1, max: 64 (nM) from 16 assay(s)
Kd: 0.22 (nM) from 1 assay(s)
IC50: min: 0.68, max: 81 (nM) from 7 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.35 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.82α = 90
b = 178.9β = 90
c = 140.19γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyBR 5124/1-1
Canada Excellence Research Chair AwardCanada--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM108635

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-13
    Type: Initial release
  • Version 1.1: 2018-01-17
    Changes: Database references
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.3: 2023-10-04
    Changes: Data collection, Database references, Refinement description