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

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Basic information

Entry
Database: PDB / ID: 6gdg
TitleCryo-EM structure of the adenosine A2A receptor bound to a miniGs heterotrimer
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • TrxA,Adenosine receptor A2a
  • nanobody Nb35
KeywordsMEMBRANE PROTEIN / G-protein coupled receptor / adenosine / GPCR / A2A receptor
Function / homology
Function and homology information


positive regulation of acetylcholine secretion, neurotransmission / positive regulation of circadian sleep/wake cycle, sleep / regulation of norepinephrine secretion / negative regulation of alpha-beta T cell activation / Adenosine P1 receptors / G protein-coupled adenosine receptor activity / G protein-coupled adenosine receptor signaling pathway / response to purine-containing compound / sensory perception / NGF-independant TRKA activation ...positive regulation of acetylcholine secretion, neurotransmission / positive regulation of circadian sleep/wake cycle, sleep / regulation of norepinephrine secretion / negative regulation of alpha-beta T cell activation / Adenosine P1 receptors / G protein-coupled adenosine receptor activity / G protein-coupled adenosine receptor signaling pathway / response to purine-containing compound / sensory perception / NGF-independant TRKA activation / Surfactant metabolism / positive regulation of urine volume / positive regulation of glutamate secretion / synaptic transmission, dopaminergic / inhibitory postsynaptic potential / : / negative regulation of vascular permeability / type 5 metabotropic glutamate receptor binding / synaptic transmission, cholinergic / blood circulation / response to caffeine / intermediate filament / eating behavior / DNA polymerase processivity factor activity / alpha-actinin binding / presynaptic active zone / PKA activation in glucagon signalling / regulation of calcium ion transport / membrane depolarization / hair follicle placode formation / protein-disulfide reductase activity / asymmetric synapse / developmental growth / D1 dopamine receptor binding / axolemma / intracellular transport / renal water homeostasis / cellular defense response / Hedgehog 'off' state / prepulse inhibition / phagocytosis / adenylate cyclase-activating adrenergic receptor signaling pathway / activation of adenylate cyclase activity / cellular response to glucagon stimulus / adenylate cyclase activator activity / presynaptic modulation of chemical synaptic transmission / response to amphetamine / regulation of insulin secretion / cell redox homeostasis / positive regulation of synaptic transmission, glutamatergic / neuron projection morphogenesis / excitatory postsynaptic potential / trans-Golgi network membrane / regulation of mitochondrial membrane potential / apoptotic signaling pathway / positive regulation of long-term synaptic potentiation / synaptic transmission, glutamatergic / central nervous system development / positive regulation of synaptic transmission, GABAergic / positive regulation of protein secretion / locomotory behavior / astrocyte activation / negative regulation of inflammatory response to antigenic stimulus / positive regulation of apoptotic signaling pathway / bone development / G-protein beta/gamma-subunit complex binding / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / Olfactory Signaling Pathway / Activation of the phototransduction cascade / adenylate cyclase-activating G protein-coupled receptor signaling pathway / 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 activity / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / platelet aggregation / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / negative regulation of inflammatory response / cognition / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / vasodilation / ADORA2B mediated anti-inflammatory cytokines production / cellular response to catecholamine stimulus / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma
Similarity search - Function
Adenosine A2A receptor / Adenosine receptor / Thioredoxin / Thioredoxin / G-protein alpha subunit, group S / Thioredoxin, conserved site / Thioredoxin family active site. / Thioredoxin domain profile. / Thioredoxin domain / Serpentine type 7TM GPCR chemoreceptor Srsx ...Adenosine A2A receptor / Adenosine receptor / Thioredoxin / Thioredoxin / G-protein alpha subunit, group S / Thioredoxin, conserved site / Thioredoxin family active site. / 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 / 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. / WD domain, G-beta repeat / 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
N-ETHYL-5'-CARBOXAMIDO ADENOSINE / 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 1
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
Homo sapiens (human)
Lama glama (llama)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.11 Å
AuthorsGarcia-Nafria, J. / Lee, Y.
Funding support United Kingdom, 2items
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, 2018Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 16, 2018Provider: repository / Type: Initial release
Revision 1.1Dec 18, 2019Group: Other / Category: atom_sites
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][1] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][2] / _atom_sites.fract_transf_matrix[3][3]

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Structure visualization

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Assembly

Deposited unit
A: TrxA,Adenosine receptor A2a
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
C: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
D: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
E: nanobody Nb35
hetero molecules


Theoretical massNumber of molelcules
Total (without water)144,1836
Polymers143,8745
Non-polymers3081
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area11250 Å2
ΔGint-67 kcal/mol
Surface area39720 Å2
MethodPISA

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Components

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Guanine nucleotide-binding protein ... , 3 types, 3 molecules BCD

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


Mass: 37285.734 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P62873
#3: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / G gamma-I


Mass: 7845.078 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNG2 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P59768
#4: Protein Guanine nucleotide-binding protein G(s) subunit alpha isoforms short,Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Adenylate cyclase-stimulating G alpha protein


Mass: 28907.684 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAS, GNAS1, GSP / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P63092

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Protein / Antibody / Non-polymers , 3 types, 3 molecules AE

#1: Protein TrxA,Adenosine receptor A2a


Mass: 52909.785 Da / Num. of mol.: 1 / Fragment: UNP residues 37-144,UNP residues 8-316
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli), (gene. exp.) Homo sapiens (human)
Gene: trxA, ADORA2A, ADORA2 / Production host: Trichoplusia ni (cabbage looper)
References: UniProt: Q14F07, UniProt: P29274, UniProt: P0AA25*PLUS
#5: Antibody nanobody Nb35


Mass: 16926.076 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Lama glama (llama) / Production host: Escherichia coli (E. coli)
#6: Chemical ChemComp-NEC / N-ETHYL-5'-CARBOXAMIDO ADENOSINE


Mass: 308.293 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C12H16N6O4

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1Adenosine A2A receptor bound to miniGs heterotrimerCOMPLEX#1-#50MULTIPLE SOURCES
2Adenosine receptor A2aCOMPLEX#11RECOMBINANT
3miniGs heterotrimerCOMPLEX#2-#41RECOMBINANT
4nanobody Nb35COMPLEX#51RECOMBINANT
Molecular weightValue: 0.137 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Escherichia coli (E. coli)562
22Homo sapiens (human)9606
33Homo sapiens (human)9606
44Lama glama (llama)9844
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Trichoplusia ni (cabbage looper)7111
23Trichoplusia ni (cabbage looper)7111
34Escherichia coli (E. coli)562
Buffer solutionpH: 7.5
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 60 sec. / Electron dose: 30 e/Å2 / Detector mode: COUNTING / Film or detector model: FEI FALCON III (4k x 4k)

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Processing

EM software
IDNameVersionCategory
1RELION2.1particle selection
2EPUimage acquisition
4Gctfv0.1.06CTF correction
7Cootmodel fitting
9RELION2.1initial Euler assignment
10RELION2.1final Euler assignment
11RELION2.1classification
12RELION3D reconstruction
13REFMAC5model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.11 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 128002 / Algorithm: FOURIER SPACE / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: RECIPROCAL

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