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Entry
Database: EMDB / ID: EMD-47952
TitleCryo-EM structure of the adenosine A2A receptor intermediate bound to a miniGs heterotrimer
Map dataRaw Map
Sample
  • Complex: Cryo-EM structure of the GPCR bound to a miniGs heterotrimer
    • Protein or peptide: Adenosine receptor A2a
    • 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
    • Protein or peptide: nanobody Nb35
  • Ligand: ADENOSINE
KeywordsGPCR / Heterotrimer / Receptor / cryo-EM / SIGNALING PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


positive regulation of acetylcholine secretion, neurotransmission / regulation of norepinephrine secretion / 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 ...positive regulation of acetylcholine secretion, neurotransmission / regulation of norepinephrine secretion / 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 / alpha-actinin binding / regulation of calcium ion transport / asymmetric synapse / PKA activation in glucagon signalling / axolemma / membrane depolarization / developmental growth / hair follicle placode formation / phagocytosis / D1 dopamine receptor binding / cellular defense response / positive regulation of synaptic transmission, glutamatergic / prepulse inhibition / 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 / 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 / G-protein beta/gamma-subunit complex binding / negative regulation of inflammatory response / platelet aggregation / vasodilation / Olfactory Signaling Pathway / cognition / 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 / G-protein activation / 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 / 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 / Sensory perception of sweet, bitter, and umami (glutamate) taste / blood coagulation / 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 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / GPER1 signaling
Similarity search - Function
Adenosine A2A receptor / Adenosine receptor / G-protein alpha subunit, group S / 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 ...Adenosine A2A receptor / Adenosine receptor / G-protein alpha subunit, group S / 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) / 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
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
Similarity search - Component
Biological speciesHomo sapiens (human) / Lama glama (llama)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.16 Å
AuthorsBi M / Wang X / Ye L / Cheng Y
Funding support United States, 2 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM149659 United States
CitationJournal: Nat Commun / Year: 2025
Title: Structure and function of a near fully-activated intermediate GPCR-Gαβγ complex.
Authors: Maxine Bi / Xudong Wang / Jinan Wang / Jun Xu / Wenkai Sun / Victor Ayo Adediwura / Yinglong Miao / Yifan Cheng / Libin Ye /
Abstract: Unraveling the signaling roles of intermediate complexes is pivotal for G protein-coupled receptor (GPCR) drug development. Despite hundreds of GPCR-Gαβγ structures, these snapshots primarily ...Unraveling the signaling roles of intermediate complexes is pivotal for G protein-coupled receptor (GPCR) drug development. Despite hundreds of GPCR-Gαβγ structures, these snapshots primarily capture the fully activated complex. Consequently, the functions of intermediate GPCR-G protein complexes remain elusive. Guided by a conformational landscape visualized via F quantitative NMR and molecular dynamics (MD) simulations, we determined the structure of an intermediate GPCR-mini-Gαβγ complex at 2.6 Å using cryo-EM, by blocking its transition to the fully activated complex. Furthermore, we present direct evidence that the complex at this intermediate state initiates a rate-limited nucleotide exchange before transitioning to the fully activated complex. In this state, BODIPY-GDP/GTP based nucleotide exchange assays further indicated the α-helical domain of the Gα is partially open, allowing it to grasp a nucleotide at a non-canonical binding site, distinct from the canonical nucleotide-binding site. These advances bridge a significant gap in our understanding of the complexity of GPCR signaling.
History
DepositionNov 18, 2024-
Header (metadata) releaseApr 9, 2025-
Map releaseApr 9, 2025-
UpdateAug 13, 2025-
Current statusAug 13, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_47952.png

Downloads & links

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Map

FileDownload / File: emd_47952.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationRaw Map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.84 Å/pix.
x 320 pix.
= 267.2 Å		0.84 Å/pix.
x 320 pix.
= 267.2 Å		0.84 Å/pix.
x 320 pix.
= 267.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.835 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 2.0
Minimum - Maximum-4.273631 - 7.847142
Average (Standard dev.)0.0109753 (±0.27261966)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 267.19998 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_47952_msk_1.map
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Additional map: Sharpened Map

Fileemd_47952_additional_1.map
AnnotationSharpened Map
Projections & Slices
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Histogram

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Half map: Half Map1

Fileemd_47952_half_map_1.map
AnnotationHalf Map1
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Half map: Half Map2

Fileemd_47952_half_map_2.map
AnnotationHalf Map2
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Sample components

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Entire : Cryo-EM structure of the GPCR bound to a miniGs heterotrimer

EntireName: Cryo-EM structure of the GPCR bound to a miniGs heterotrimer
Components
  • Complex: Cryo-EM structure of the GPCR bound to a miniGs heterotrimer
    • Protein or peptide: Adenosine receptor A2a
    • 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
    • Protein or peptide: nanobody Nb35
  • Ligand: ADENOSINE

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Supramolecule #1: Cryo-EM structure of the GPCR bound to a miniGs heterotrimer

SupramoleculeName: Cryo-EM structure of the GPCR bound to a miniGs heterotrimer
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 144 KDa

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Macromolecule #1: Adenosine receptor A2a

MacromoleculeName: Adenosine receptor A2a / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 39.517078 KDa
Recombinant expressionOrganism: Komagataella pastoris (fungus)
SequenceString: DYKDDDDKSN NNNNNNNNLG ENLYFQGAPI MGSSVYITVE LAIAVLAILG NVLVCWAVWL NSNLQNVTNY FVVSLAAADI AVGVLAIPF AITISTGFCA ACHGCLFIAC FVLVLTQSSI FSLLAIAIDR YIAIRIPLRY NGLVTGTRAK GIIAICWVLS F AIGLTPML ...String:
DYKDDDDKSN NNNNNNNNLG ENLYFQGAPI MGSSVYITVE LAIAVLAILG NVLVCWAVWL NSNLQNVTNY FVVSLAAADI AVGVLAIPF AITISTGFCA ACHGCLFIAC FVLVLTQSSI FSLLAIAIDR YIAIRIPLRY NGLVTGTRAK GIIAICWVLS F AIGLTPML GWNNCGQPKE GKNHSQGCGE GQVACLFEDV VPMNYMVYFN FFACVLVPLL LMLGVYLRIF LAARRQLKQM ES QPLPGER ARSTLQKECH AAKSLAIIVG LFALCWLPLH IINCFTFFCP DCSHAPLWLM YLAIVLSHTN SVVNPFIYAY AIR EFRQTF RKIIRSHVLR QQEPFKAHHH HHHHHHH

UniProtKB: 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: 37.728152 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String:
GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWN

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: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI 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 short

MacromoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
EC number: Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 30.776713 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MGHHHHHHEN LYFQGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGADN SGKSTIVKQM RILHGGSGGS GGTSGIFET KFQVDKVNFH MFDVGGQRDE RRKWIQCFND VTAIIFVVDS SDYNRLQEAL NLFKSIWNNR WLRTISVILF L NKQDLLAE ...String:
MGHHHHHHEN LYFQGNSKTE DQRNEEKAQR EANKKIEKQL QKDKQVYRAT HRLLLLGADN SGKSTIVKQM RILHGGSGGS GGTSGIFET KFQVDKVNFH MFDVGGQRDE RRKWIQCFND VTAIIFVVDS SDYNRLQEAL NLFKSIWNNR WLRTISVILF L NKQDLLAE KVLAGKSKIE DYFPEFARYT TPEDATPEPG EDPRVTRAKY FIRDEFLRIS TASGDGRHYC YPHFTCAVDT EN ARRIFND CRDIIQRMHL RQYELL

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: ADENOSINE

MacromoleculeName: ADENOSINE / type: ligand / ID: 6 / Number of copies: 1 / Formula: ADN
Molecular weightTheoretical: 267.241 Da
Chemical component information

ChemComp-ADN:
ADENOSINE

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation statecell

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 47.7 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6gdg

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.16 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 43472
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION

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