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- PDB-9r42: Quinpirole-bound Dopamine D3 Receptor - Gi Protein Complex -

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Basic information

Entry
Database: PDB / ID: 9r42
TitleQuinpirole-bound Dopamine D3 Receptor - Gi Protein Complex
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Soluble cytochrome b562,D(3) dopamine receptor
KeywordsMEMBRANE PROTEIN / Dopamine D3 Receptor / GPCR
Function / homology
Function and homology information


musculoskeletal movement, spinal reflex action / acid secretion / dopamine neurotransmitter receptor activity, coupled via Gi/Go / response to histamine / adenylate cyclase-inhibiting dopamine receptor signaling pathway / regulation of potassium ion transport / Dopamine receptors / regulation of dopamine uptake involved in synaptic transmission / positive regulation of dopamine receptor signaling pathway / phospholipase C-activating dopamine receptor signaling pathway ...musculoskeletal movement, spinal reflex action / acid secretion / dopamine neurotransmitter receptor activity, coupled via Gi/Go / response to histamine / adenylate cyclase-inhibiting dopamine receptor signaling pathway / regulation of potassium ion transport / Dopamine receptors / regulation of dopamine uptake involved in synaptic transmission / positive regulation of dopamine receptor signaling pathway / phospholipase C-activating dopamine receptor signaling pathway / negative regulation of oligodendrocyte differentiation / G protein-coupled receptor internalization / negative regulation of synaptic transmission, glutamatergic / arachidonate secretion / positive regulation of cytokinesis / response to morphine / negative regulation of cytosolic calcium ion concentration / dopamine metabolic process / regulation of dopamine secretion / negative regulation of protein secretion / social behavior / prepulse inhibition / negative regulation of blood pressure / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / behavioral response to cocaine / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway / positive regulation of mitotic nuclear division / D2 dopamine receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / G protein-coupled serotonin receptor binding / cellular response to forskolin / negative regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / regulation of mitotic spindle organization / chemokine-mediated signaling pathway / learning / circadian regulation of gene expression / response to cocaine / Regulation of insulin secretion / neuropeptide signaling pathway / response to prostaglandin E / locomotory behavior / positive regulation of cholesterol biosynthetic process / electron transport chain / negative regulation of insulin secretion / visual learning / G protein-coupled receptor binding / response to peptide hormone / G protein-coupled receptor activity / G-protein beta/gamma-subunit complex binding / centriolar satellite / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / intracellular calcium ion homeostasis / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / Prostacyclin signalling through prostacyclin receptor / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / GDP binding / 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 / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / cellular response to prostaglandin E stimulus / heterotrimeric G-protein complex / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / extracellular vesicle / sensory perception of taste / sperm principal piece / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / adenylate cyclase-activating G protein-coupled receptor signaling pathway / retina development in camera-type eye / GTPase binding / G protein activity
Similarity search - Function
Dopamine D3 receptor / Dopamine receptor family / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / G protein alpha subunit, helical insertion / G protein alpha subunit / Guanine nucleotide binding protein (G-protein), alpha subunit ...Dopamine D3 receptor / Dopamine receptor family / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / G-protein alpha subunit, group I / Serpentine type 7TM GPCR chemoreceptor Srsx / G protein alpha subunit, helical insertion / G protein alpha subunit / Guanine nucleotide binding protein (G-protein), alpha subunit / G-protein alpha subunit / G-alpha domain profile. / 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. / 7 transmembrane receptor (rhodopsin family) / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 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
: / Soluble cytochrome b562 / D(3) dopamine receptor / 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(i) subunit alpha-1
Similarity search - Component
Biological speciesHomo sapiens (human)
Escherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.24 Å
AuthorsSchneider, J. / Gmeiner, P. / Hove, T. / Boettcher, B.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: To Be Published
Title: Quinpirole-bound Dopamine D3 Receptor - Gi Protein Complex
Authors: Schneider, J. / Gmeiner, P. / Hove, T. / Boettcher, B.
History
DepositionMay 7, 2025Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 20, 2026Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Guanine nucleotide-binding protein G(i) subunit alpha-1
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
R: Soluble cytochrome b562,D(3) dopamine receptor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)149,9385
Polymers149,7194
Non-polymers2191
Water362
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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

#1: Protein Guanine nucleotide-binding protein G(i) subunit alpha-1


Mass: 40414.047 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAI1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P63096
#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1


Mass: 38810.352 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P62873
#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.) Homo sapiens (human) / Gene: GNG2 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P59768

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Protein , 1 types, 1 molecules R

#4: Protein Soluble cytochrome b562,D(3) dopamine receptor / Cytochrome b-562 / Dopamine D3 receptor


Mass: 62633.105 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli), (gene. exp.) Homo sapiens (human)
Gene: cybC, DRD3 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P0ABE7, UniProt: P35462

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Non-polymers , 2 types, 3 molecules

#5: Chemical ChemComp-A1JDS / (4aR,8aR)-5-propyl-1,4,4a,6,7,8,8a,9-octahydropyrazolo[3,4-g]quinoline


Mass: 219.326 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C13H21N3 / Feature type: SUBJECT OF INVESTIGATION
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Formula: H2O

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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

ComponentName: Quinpirole-bound dopamine D3 receptor in complex with Gi protein
Type: COMPLEX / Entity ID: #1-#4 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Details: The original data (e.g., STAR files or micrograph metadata) are not available for this dataset. Therefore, the reported minimum and maximum defocus values (800 nm and 2500 nm, respectively) ...Details: The original data (e.g., STAR files or micrograph metadata) are not available for this dataset. Therefore, the reported minimum and maximum defocus values (800 nm and 2500 nm, respectively) are based on standard cryo-EM data collection practices for similar resolution and instrumentation at the time of acquisition.
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 130000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 70 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARCparticle selection
4cryoSPARCCTF correction
10cryoSPARCinitial Euler assignment
12RELION5classification
13RELION53D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.24 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 191116 / Symmetry type: POINT

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