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- EMDB-4390: Cryo-EM structure of the adenosine A2A receptor bound to a miniGs... -

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Basic information

Entry
Database: EMDB / ID: EMD-4390
TitleCryo-EM structure of the adenosine A2A receptor bound to a miniGs heterotrimer
Map data
Sample
  • Complex: Adenosine A2A receptor bound to miniGs heterotrimer
    • Complex: Adenosine receptor A2a
      • Protein or peptide: TrxA,Adenosine receptor A2a
    • Complex: miniGs heterotrimer
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Complex: nanobody Nb35
      • Protein or peptide: nanobody Nb35
  • Ligand: N-ETHYL-5'-CARBOXAMIDO ADENOSINE
KeywordsG-protein coupled receptor / adenosine / GPCR / A2A receptor / MEMBRANE PROTEIN
Function / homology
Function and homology information


regulation of norepinephrine secretion / positive regulation of acetylcholine secretion, neurotransmission / negative regulation of alpha-beta T cell activation / positive regulation of circadian sleep/wake cycle, sleep / Adenosine P1 receptors / G protein-coupled adenosine receptor activity / response to purine-containing compound / G protein-coupled adenosine receptor signaling pathway / NGF-independant TRKA activation / Surfactant metabolism ...regulation of norepinephrine secretion / positive regulation of acetylcholine secretion, neurotransmission / negative regulation of alpha-beta T cell activation / positive regulation of circadian sleep/wake cycle, sleep / Adenosine P1 receptors / G protein-coupled adenosine receptor activity / response to purine-containing compound / G protein-coupled adenosine receptor signaling pathway / NGF-independant TRKA activation / Surfactant metabolism / sensory perception / positive regulation of urine volume / synaptic transmission, dopaminergic / type 5 metabotropic glutamate receptor binding / negative regulation of vascular permeability / synaptic transmission, cholinergic / positive regulation of glutamate secretion / intermediate filament / presynaptic active zone / blood circulation / response to caffeine / eating behavior / inhibitory postsynaptic potential / DNA polymerase processivity factor activity / alpha-actinin binding / regulation of calcium ion transport / protein-disulfide reductase activity / asymmetric synapse / PKA activation in glucagon signalling / axolemma / membrane depolarization / developmental growth / hair follicle placode formation / phagocytosis / D1 dopamine receptor binding / cellular defense response / prepulse inhibition / positive regulation of synaptic transmission, glutamatergic / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / activation of adenylate cyclase activity / Hedgehog 'off' state / adenylate cyclase-activating adrenergic receptor signaling pathway / neuron projection morphogenesis / cellular response to glucagon stimulus / astrocyte activation / presynaptic modulation of chemical synaptic transmission / regulation of insulin secretion / cell redox homeostasis / response to amphetamine / adenylate cyclase activator activity / central nervous system development / trans-Golgi network membrane / positive regulation of long-term synaptic potentiation / positive regulation of apoptotic signaling pathway / positive regulation of synaptic transmission, GABAergic / regulation of mitochondrial membrane potential / positive regulation of protein secretion / excitatory postsynaptic potential / synaptic transmission, glutamatergic / locomotory behavior / apoptotic signaling pathway / negative regulation of inflammatory response to antigenic stimulus / bone development / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / platelet aggregation / negative regulation of inflammatory response / G-protein beta/gamma-subunit complex binding / vasodilation / cognition / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / adenylate cyclase-activating G protein-coupled receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / photoreceptor disc membrane / blood coagulation / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / sensory perception of smell
Similarity search - Function
Adenosine A2A receptor / Adenosine receptor / Thioredoxin / Thioredoxin / Thioredoxin, conserved site / Thioredoxin family active site. / G-protein alpha subunit, group S / Thioredoxin domain profile. / Thioredoxin domain / Serpentine type 7TM GPCR chemoreceptor Srsx ...Adenosine A2A receptor / Adenosine receptor / Thioredoxin / Thioredoxin / Thioredoxin, conserved site / Thioredoxin family active site. / G-protein alpha subunit, group S / Thioredoxin domain profile. / Thioredoxin domain / Serpentine type 7TM GPCR chemoreceptor Srsx / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / Thioredoxin-like superfamily / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Thioredoxin 1 / Adenosine receptor A2a / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Thioredoxin
Similarity search - Component
Biological speciesEscherichia coli (E. coli) / Homo sapiens (human) / Lama glama (llama)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.11 Å
AuthorsGarcia-Nafria J / Lee Y
Funding support United Kingdom, 2 items
OrganizationGrant numberCountry
European Research CouncilEMPSI 339995 United Kingdom
Medical Research Council (United Kingdom)MRC U105197215 United Kingdom
CitationJournal: Elife / Year: 2018
Title: Cryo-EM structure of the adenosine A receptor coupled to an engineered heterotrimeric G protein.
Authors: Javier García-Nafría / Yang Lee / Xiaochen Bai / Byron Carpenter / Christopher G Tate /
Abstract: The adenosine A receptor (AR) is a prototypical G protein-coupled receptor (GPCR) that couples to the heterotrimeric G protein G. Here, we determine the structure by electron cryo-microscopy (cryo-EM) ...The adenosine A receptor (AR) is a prototypical G protein-coupled receptor (GPCR) that couples to the heterotrimeric G protein G. Here, we determine the structure by electron cryo-microscopy (cryo-EM) of AR at pH 7.5 bound to the small molecule agonist NECA and coupled to an engineered heterotrimeric G protein, which contains mini-G, the βγ subunits and nanobody Nb35. Most regions of the complex have a resolution of ~3.8 Å or better. Comparison with the 3.4 Å resolution crystal structure shows that the receptor and mini-G are virtually identical and that the density of the side chains and ligand are of comparable quality. However, the cryo-EM density map also indicates regions that are flexible in comparison to the crystal structures, which unexpectedly includes regions in the ligand binding pocket. In addition, an interaction between intracellular loop 1 of the receptor and the β subunit of the G protein was observed.
History
DepositionApr 23, 2018-
Header (metadata) releaseMay 16, 2018-
Map releaseMay 16, 2018-
UpdateNov 20, 2024-
Current statusNov 20, 2024Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0631
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.0631
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6gdg
  • Surface level: 0.0631
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_4390.png

Downloads & links

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Map

FileDownload / File: emd_4390.map.gz / Format: CCP4 / Size: 12.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.07 Å/pix.
x 150 pix.
= 160.5 Å		1.07 Å/pix.
x 150 pix.
= 160.5 Å		1.07 Å/pix.
x 150 pix.
= 160.5 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.07 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0631 / Movie #1: 0.0631
Minimum - Maximum-0.17760025 - 0.29012117
Average (Standard dev.)0.0013410164 (±0.012475579)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions150150150
Spacing150150150
CellA=B=C: 160.50002 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.071.071.07
M x/y/z150150150
origin x/y/z0.0000.0000.000
length x/y/z160.500160.500160.500
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS150150150
D min/max/mean-0.1780.2900.001

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Supplemental data

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Sample components

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Entire : Adenosine A2A receptor bound to miniGs heterotrimer

EntireName: Adenosine A2A receptor bound to miniGs heterotrimer
Components
  • Complex: Adenosine A2A receptor bound to miniGs heterotrimer
    • Complex: Adenosine receptor A2a
      • Protein or peptide: TrxA,Adenosine receptor A2a
    • Complex: miniGs heterotrimer
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Complex: nanobody Nb35
      • Protein or peptide: nanobody Nb35
  • Ligand: N-ETHYL-5'-CARBOXAMIDO ADENOSINE

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Supramolecule #1: Adenosine A2A receptor bound to miniGs heterotrimer

SupramoleculeName: Adenosine A2A receptor bound to miniGs heterotrimer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Molecular weightTheoretical: 137 KDa

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Supramolecule #2: Adenosine receptor A2a

SupramoleculeName: Adenosine receptor A2a / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Escherichia coli (E. coli)

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Supramolecule #3: miniGs heterotrimer

SupramoleculeName: miniGs heterotrimer / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#4
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #4: nanobody Nb35

SupramoleculeName: nanobody Nb35 / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #5
Source (natural)Organism: Lama glama (llama)

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Macromolecule #1: TrxA,Adenosine receptor A2a

MacromoleculeName: TrxA,Adenosine receptor A2a / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 52.909785 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MLLVNQSHQG FNKEHTSKMV SAIVLYVLLA AAAHSAFAAH HHHHHHHHHE NLYFQGSDKI IHLTDDSFDT DVLKADGAIL VDFWAEWSG PSKMIAPILD EIADEYQGKL TVAKLNIDQN PGTAPKYGIR GIPTLLLFAN GEVAATKVGA LSKGQLKEFL D ANLAEAAA ...String:
MLLVNQSHQG FNKEHTSKMV SAIVLYVLLA AAAHSAFAAH HHHHHHHHHE NLYFQGSDKI IHLTDDSFDT DVLKADGAIL VDFWAEWSG PSKMIAPILD EIADEYQGKL TVAKLNIDQN PGTAPKYGIR GIPTLLLFAN GEVAATKVGA LSKGQLKEFL D ANLAEAAA KAVYITVELA IAVLAILGNV LVCWAVWLNS NLQNVTNYFV VSLAAADIAV GVLAIPFAIT ISTGFCAACH GC LFIACFV LVLTQSSIFS LLAIAIDRYI AIRIPLRYNG LVTGTRAKGI IAICWVLSFA IGLTPMLGWN NCGQPKEGKA HSQ GCGEGQ VACLFEDVVP MNYMVYFNFF ACVLVPLLLM LGVYLRIFLA ARRQLKQMES QPLPGERARS TLQKEVHAAK SLAI IVGLF ALCWLPLHII NCFTFFCPDC SHAPLWLMYL AIVLSHTNSV VNPFIYAYRI REFRQTFRKI IRSHVLRQQE PFKA

UniProtKB: Thioredoxin, Adenosine receptor A2a

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Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.285734 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: SELDQLRQEA EQLKNQIRDA RKACADATLS QITNNIDPVG RIQMRTRRTL RGHLAKIYAM HWGTDSRLLV SASQDGKLII WDSYTTNKV HAIPLRSSWV MTCAYAPSGN YVACGGLDNI CSIYNLKTRE GNVRVSRELA GHTGYLSCCR FLDDNQIVTS S GDTTCALW ...String:
SELDQLRQEA EQLKNQIRDA RKACADATLS QITNNIDPVG RIQMRTRRTL RGHLAKIYAM HWGTDSRLLV SASQDGKLII WDSYTTNKV HAIPLRSSWV MTCAYAPSGN YVACGGLDNI CSIYNLKTRE GNVRVSRELA GHTGYLSCCR FLDDNQIVTS S GDTTCALW DIETGQQTTT FTGHTGDVMS LSLAPDTRLF VSGACDASAK LWDVREGMCR QTFTGHESDI NAICFFPNGN AF ATGSDDA TCRLFDLRAD QELMTYSHDN IICGITSVSF SKSGRLLLAG YDDFNCNVWD ALKADRAGVL AGHDNRVSCL GVT DDGMAV ATGSWDSFLK IWN

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

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Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.845078 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFSAI L

UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

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Macromolecule #4: Guanine nucleotide-binding protein G(s) subunit alpha isoforms sh...

MacromoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.907684 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: NSKTEDQRNE EKAQREANKK IEKQLQKDKQ VYRATHRLLL LGADNSGKST IVKQMRILHG GSGGSGGTSG IFETKFQVDK VNFHMFDVG GQRDERRKWI QCFNDVTAII FVVDSSDYNR LQEALNLFKS IWNNRWLRTI SVILFLNKQD LLAEKVLAGK S KIEDYFPE ...String:
NSKTEDQRNE EKAQREANKK IEKQLQKDKQ VYRATHRLLL LGADNSGKST IVKQMRILHG GSGGSGGTSG IFETKFQVDK VNFHMFDVG GQRDERRKWI QCFNDVTAII FVVDSSDYNR LQEALNLFKS IWNNRWLRTI SVILFLNKQD LLAEKVLAGK S KIEDYFPE FARYTTPEDA TPEPGEDPRV TRAKYFIRDE FLRISTASGD GRHYCYPHFT CAVDTENARR IFNDCRDIIQ RM HLRQYEL L

UniProtKB: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short, Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

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Macromolecule #5: nanobody Nb35

MacromoleculeName: nanobody Nb35 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Lama glama (llama)
Molecular weightTheoretical: 16.926076 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MKYLLPTAAA GLLLLAAQPA MAQVQLQESG GGLVQPGGSL RLSCAASGFT FSNYKMNWVR QAPGKGLEWV SDISQSGASI SYTGSVKGR FTISRDNAKN TLYLQMNSLK PEDTAVYYCA RCPAPFTRDC FDVTSTTYAY RGQGTQVTVS SHHHHHH

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Macromolecule #6: N-ETHYL-5'-CARBOXAMIDO ADENOSINE

MacromoleculeName: N-ETHYL-5'-CARBOXAMIDO ADENOSINE / type: ligand / ID: 6 / Number of copies: 1 / Formula: NEC
Molecular weightTheoretical: 308.293 Da
Chemical component information

ChemComp-NEC:
N-ETHYL-5'-CARBOXAMIDO ADENOSINE

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1 mg/mL
BufferpH: 7.5
GridModel: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Average exposure time: 60.0 sec. / Average electron dose: 30.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER / Details: ab initio
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 4.11 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 128002
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 2.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 2.1)
Final 3D classificationNumber classes: 3 / Software - Name: RELION (ver. 2.1)

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Atomic model buiding 1

RefinementSpace: RECIPROCAL / Protocol: FLEXIBLE FIT
Output model

PDB-6gdg:
Cryo-EM structure of the adenosine A2A receptor bound to a miniGs heterotrimer

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