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- PDB-8x17: Cryo-EM structure of adenosine receptor A3AR bound to CF102 -

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Basic information

Entry
Database: PDB / ID: 8x17
TitleCryo-EM structure of adenosine receptor A3AR bound to CF102
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Adenosine receptor A3
  • scFv16
KeywordsMEMBRANE PROTEIN / GPCR / adenosine A3 receptor / ligand selectivity / CF102
Function / homology
Function and homology information


Adenylate cyclase inhibitory pathway / regulation of norepinephrine secretion / Adenosine P1 receptors / G protein-coupled adenosine receptor activity / G protein-coupled adenosine receptor signaling pathway / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste ...Adenylate cyclase inhibitory pathway / regulation of norepinephrine secretion / Adenosine P1 receptors / G protein-coupled adenosine receptor activity / G protein-coupled adenosine receptor signaling pathway / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / G alpha (z) signalling events / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / G alpha (i) signalling events / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Thrombin signalling through proteinase activated receptors (PARs) / G alpha (12/13) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Ca2+ pathway / Thrombin signalling through proteinase activated receptors (PARs) / G alpha (z) signalling events / Extra-nuclear estrogen signaling / G alpha (s) signalling events / photoreceptor outer segment membrane / G alpha (q) signalling events / G alpha (i) signalling events / spectrin binding / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / regulation of heart contraction / negative regulation of NF-kappaB transcription factor activity / alkylglycerophosphoethanolamine phosphodiesterase activity / photoreceptor outer segment / positive regulation of protein localization to cell cortex / activation of adenylate cyclase activity / G protein-coupled serotonin receptor binding / photoreceptor inner segment / cardiac muscle cell apoptotic process / presynaptic modulation of chemical synaptic transmission / cellular response to forskolin / regulation of mitotic spindle organization / negative regulation of cell migration / G protein-coupled receptor binding / Schaffer collateral - CA1 synapse / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / response to wounding / GDP binding / cellular response to catecholamine stimulus / adenylate cyclase-activating dopamine receptor signaling pathway / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / sensory perception of taste / signaling receptor complex adaptor activity / presynaptic membrane / cell body / GTPase binding / positive regulation of cytosolic calcium ion concentration / retina development in camera-type eye / midbody / cell cortex / G alpha (i) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / phospholipase C-activating G protein-coupled receptor signaling pathway / cellular response to hypoxia / cell population proliferation / G protein-coupled receptor signaling pathway / inflammatory response / negative regulation of cell population proliferation / cell division / GTPase activity / synapse / centrosome / dendrite / protein-containing complex binding
Similarity search - Function
Adenosine A3 receptor / Adenosine receptor / G-protein alpha subunit, group I / 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 A3 receptor / Adenosine receptor / G-protein alpha subunit, group I / 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) / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / WD domain, G-beta repeat / 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 A3 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(i) subunit alpha-1 / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
Homo sapiens (human)
Bos taurus (domestic cattle)
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.19 Å
AuthorsCai, H. / Xu, Y. / Xu, H.E.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)81902085 China
CitationJournal: Nat Commun / Year: 2024
Title: Cryo-EM structures of adenosine receptor AAR bound to selective agonists.
Authors: Hongmin Cai / Shimeng Guo / Youwei Xu / Jun Sun / Junrui Li / Zhikan Xia / Yi Jiang / Xin Xie / H Eric Xu /
Abstract: The adenosine A receptor (AAR), a key member of the G protein-coupled receptor family, is a promising therapeutic target for inflammatory and cancerous conditions. The selective AAR agonists, CF101 ...The adenosine A receptor (AAR), a key member of the G protein-coupled receptor family, is a promising therapeutic target for inflammatory and cancerous conditions. The selective AAR agonists, CF101 and CF102, are clinically significant, yet their recognition mechanisms remained elusive. Here we report the cryogenic electron microscopy structures of the full-length human AAR bound to CF101 and CF102 with heterotrimeric G protein in complex at 3.3-3.2 Å resolution. These agonists reside in the orthosteric pocket, forming conserved interactions via their adenine moieties, while their 3-iodobenzyl groups exhibit distinct orientations. Functional assays reveal the critical role of extracellular loop 3 in AAR's ligand selectivity and receptor activation. Key mutations, including His, Ser, and Ser, in a unique sub-pocket of AAR, significantly impact receptor activation. Comparative analysis with the inactive AAR structure highlights a conserved receptor activation mechanism. Our findings provide comprehensive insights into the molecular recognition and signaling of AAR, paving the way for designing subtype-selective adenosine receptor ligands.
History
DepositionNov 6, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 24, 2024Provider: repository / Type: Initial release
Revision 1.1May 8, 2024Group: Database references / Category: citation
Item: _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Nov 13, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
R: Adenosine receptor A3
C: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
H: scFv16
A: Guanine nucleotide-binding protein G(i) subunit alpha-1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)149,2586
Polymers148,7135
Non-polymers5451
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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

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


Mass: 37915.496 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Gnb1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P54311
#3: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / G gamma-I


Mass: 7861.143 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (domestic cattle) / Gene: GNG2 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P63212
#5: Protein Guanine nucleotide-binding protein G(i) subunit alpha-1


Mass: 40445.059 Da / Num. of mol.: 1 / Mutation: G203A,A326S
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (domestic cattle) / Gene: GNAI1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P63097

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

#2: Protein Adenosine receptor A3


Mass: 36214.465 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ADORA3 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P0DMS8
#4: Antibody scFv16


Mass: 26277.299 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Trichoplusia ni (cabbage looper)
#6: Chemical ChemComp-XS0 / namodenoson / (2~{S},3~{S},4~{R},5~{R})-5-[2-chloranyl-6-[(3-iodanylphenyl)methylamino]purin-9-yl]-~{N}-methyl-3,4-bis(oxidanyl)oxolane-2-carboxamide / CF102 / Cl-IB-MECA


Mass: 544.731 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C18H18ClIN6O4 / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
Has protein modificationY

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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
1Cryo-EM structure of adenosine receptor A3AR bound to CF102COMPLEX#1-#50RECOMBINANT
2A3ARCOMPLEX#11RECOMBINANT
3G proteinCOMPLEX#21RECOMBINANT
4G proteinCOMPLEX#3, #51RECOMBINANT
5scFv16COMPLEX#41RECOMBINANT
Molecular weightValue: 0.16 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
23Homo sapiens (human)9606
32Rattus norvegicus (Norway rat)10116
44Bos taurus (domestic cattle)9913
55Mus musculus (house mouse)10090
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE

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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 / Nominal defocus max: 5000 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 3.19 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 102581 / Symmetry type: POINT

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