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- PDB-8tb0: Cryo-EM Structure of GPR61-G protein complex stabilized by scFv16 -

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Basic information

Entry
Database: PDB / ID: 8tb0
TitleCryo-EM Structure of GPR61-G protein complex stabilized by scFv16
Components
  • GPR61 fused to dominant negative G alpha S/I N18 chimera
  • 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
  • Single-chain Fv16
KeywordsSIGNALING PROTEIN / GPR61 / GPCR / Signaling complex
Function / homology
Function and homology information


ligand-independent adenylate cyclase-activating G protein-coupled receptor signaling pathway / arrestin family protein binding / PKA activation in glucagon signalling / hair follicle placode formation / developmental growth / D1 dopamine receptor binding / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / Hedgehog 'off' state ...ligand-independent adenylate cyclase-activating G protein-coupled receptor signaling pathway / arrestin family protein binding / PKA activation in glucagon signalling / hair follicle placode formation / developmental growth / D1 dopamine receptor binding / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / Hedgehog 'off' state / adenylate cyclase-activating adrenergic receptor signaling pathway / activation of adenylate cyclase activity / regulation of insulin secretion / cellular response to glucagon stimulus / adenylate cyclase activator activity / trans-Golgi network membrane / negative regulation of inflammatory response to antigenic stimulus / G protein-coupled receptor activity / bone development / G-protein beta/gamma-subunit complex binding / platelet aggregation / 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 / adenylate cyclase-activating G protein-coupled receptor signaling pathway / G-protein activation / 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 / Sensory perception of sweet, bitter, and umami (glutamate) taste / 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 / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / sensory perception of smell / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / positive regulation of cold-induced thermogenesis / G protein activity / GTPase binding / Ca2+ pathway / retina development in camera-type eye / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / G alpha (i) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / receptor complex / endosome / endosome membrane / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / GTP binding / signal transduction / extracellular exosome / metal ion binding / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
G-protein alpha subunit, group S / 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 ...G-protein alpha subunit, group S / 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
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 / G-protein coupled receptor 61
Similarity search - Component
Biological speciesHomo sapiens (human)
Escherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.47 Å
AuthorsLees, J.A. / Dias, J.M. / Han, S.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Nat Commun / Year: 2023
Title: An inverse agonist of orphan receptor GPR61 acts by a G protein-competitive allosteric mechanism.
Authors: Joshua A Lees / João M Dias / Francis Rajamohan / Jean-Philippe Fortin / Rebecca O'Connor / Jimmy X Kong / Emily A G Hughes / Ethan L Fisher / Jamison B Tuttle / Gabrielle Lovett / Bethany ...Authors: Joshua A Lees / João M Dias / Francis Rajamohan / Jean-Philippe Fortin / Rebecca O'Connor / Jimmy X Kong / Emily A G Hughes / Ethan L Fisher / Jamison B Tuttle / Gabrielle Lovett / Bethany L Kormos / Rayomand J Unwalla / Lei Zhang / Anne-Marie Dechert Schmitt / Dahui Zhou / Michael Moran / Kimberly A Stevens / Kimberly F Fennell / Alison E Varghese / Andrew Maxwell / Emmaline E Cote / Yuan Zhang / Seungil Han /
Abstract: GPR61 is an orphan GPCR related to biogenic amine receptors. Its association with phenotypes relating to appetite makes it of interest as a druggable target to treat disorders of metabolism and body ...GPR61 is an orphan GPCR related to biogenic amine receptors. Its association with phenotypes relating to appetite makes it of interest as a druggable target to treat disorders of metabolism and body weight, such as obesity and cachexia. To date, the lack of structural information or a known biological ligand or tool compound has hindered comprehensive efforts to study GPR61 structure and function. Here, we report a structural characterization of GPR61, in both its active-like complex with heterotrimeric G protein and in its inactive state. Moreover, we report the discovery of a potent and selective small-molecule inverse agonist against GPR61 and structural elucidation of its allosteric binding site and mode of action. These findings offer mechanistic insights into an orphan GPCR while providing both a structural framework and tool compound to support further studies of GPR61 function and modulation.
History
DepositionJun 28, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 4, 2023Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Oct 4, 2023Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Nov 20, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update
Revision 1.2May 28, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
Revision 1.1May 28, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
F: Single-chain Fv16
R: GPR61 fused to dominant negative G alpha S/I N18 chimera
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
G: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2


Theoretical massNumber of molelcules
Total (without water)185,2674
Polymers185,2674
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Antibody Single-chain Fv16


Mass: 28813.047 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#2: Protein GPR61 fused to dominant negative G alpha S/I N18 chimera / Biogenic amine receptor-like G-protein coupled receptor / Adenylate cyclase-stimulating G alpha protein


Mass: 111175.773 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: GPR61, BALGR, GPCR3, GNAS, GNAS1, GSP / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q9BZJ8, UniProt: P63092
#3: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 37416.930 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Escherichia coli (E. coli) / References: UniProt: P62873
#4: 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
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: GPR61-GalphaS-Gbeta1-Ggamma2 complex with single-chain Fv16
Type: COMPLEX / Entity ID: #1, #3-#4 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.5
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.47 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 52887 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0038647
ELECTRON MICROSCOPYf_angle_d0.58911727
ELECTRON MICROSCOPYf_dihedral_angle_d4.5731184
ELECTRON MICROSCOPYf_chiral_restr0.0431336
ELECTRON MICROSCOPYf_plane_restr0.0041484

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