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- PDB-9cgj: CryoEM structure of delta opioid receptor bound to G proteins and... -

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Basic information

Entry
Database: PDB / ID: 9cgj
TitleCryoEM structure of delta opioid receptor bound to G proteins and a partial agonist
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Delta-type opioid receptor
  • ScFv16 protein
KeywordsMEMBRANE PROTEIN / GPCR / Delta OPIOID Receptor / bitopic ligand
Function / homology
Function and homology information


G protein-coupled enkephalin receptor activity / spine apparatus / positive regulation of CREB transcription factor activity / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / cellular response to toxic substance / receptor serine/threonine kinase binding / neuropeptide binding / eating behavior / neuronal dense core vesicle ...G protein-coupled enkephalin receptor activity / spine apparatus / positive regulation of CREB transcription factor activity / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / cellular response to toxic substance / receptor serine/threonine kinase binding / neuropeptide binding / eating behavior / neuronal dense core vesicle / regulation of calcium ion transport / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / neuropeptide signaling pathway / negative regulation of protein-containing complex assembly / positive regulation of protein localization to cell cortex / Adenylate cyclase inhibitory pathway / T cell migration / D2 dopamine receptor binding / positive regulation of peptidyl-serine phosphorylation / response to prostaglandin E / G protein-coupled serotonin receptor binding / adenylate cyclase regulator activity / adenylate cyclase-inhibiting serotonin receptor signaling pathway / axon terminus / dendrite membrane / cellular response to forskolin / regulation of mitotic spindle organization / Peptide ligand-binding receptors / regulation of mitochondrial membrane potential / adult locomotory behavior / Regulation of insulin secretion / response to nicotine / positive regulation of cholesterol biosynthetic process / G protein-coupled receptor binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / postsynaptic density membrane / cellular response to growth factor stimulus / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / response to peptide hormone / G-protein beta/gamma-subunit complex binding / centriolar satellite / Olfactory Signaling Pathway / 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 / synaptic vesicle membrane / 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 / GDP binding / 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 / 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) / presynaptic membrane / G protein activity / GTPase binding / Ca2+ pathway / retina development in camera-type eye / midbody / cell cortex / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / G alpha (i) signalling events / Interleukin-4 and Interleukin-13 signaling / 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 / cellular response to hypoxia / G alpha (q) signalling events / response to ethanol / Ras protein signal transduction / Extra-nuclear estrogen signaling
Similarity search - Function
Delta opioid receptor / Opioid 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 ...Delta opioid receptor / Opioid 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
: / Delta-type opioid 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)
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsFay, J.F. / Che, T.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01DA057790 United States
CitationJournal: Nat Commun / Year: 2025
Title: Structure-guided design of partial agonists at an opioid receptor.
Authors: Balazs R Varga / Sarah M Bernhard / Amal El Daibani / Saheem A Zaidi / Jordy H Lam / Jhoan Aguilar / Kevin Appourchaux / Antonina L Nazarova / Alexa Kouvelis / Ryosuke Shinouchi / Haylee R ...Authors: Balazs R Varga / Sarah M Bernhard / Amal El Daibani / Saheem A Zaidi / Jordy H Lam / Jhoan Aguilar / Kevin Appourchaux / Antonina L Nazarova / Alexa Kouvelis / Ryosuke Shinouchi / Haylee R Hammond / Shainnel O Eans / Violetta Weinreb / Elyssa B Margolis / Jonathan F Fay / Xi-Ping Huang / Amynah Pradhan / Vsevolod Katritch / Jay P McLaughlin / Susruta Majumdar / Tao Che /
Abstract: Chronic pain and opioid overdose deaths highlight the need for non-addictive analgesics with novel mechanisms. The δ opioid receptor (δOR) is a promising target, as it lacks the respiratory ...Chronic pain and opioid overdose deaths highlight the need for non-addictive analgesics with novel mechanisms. The δ opioid receptor (δOR) is a promising target, as it lacks the respiratory depression associated with µ opioid receptor (µOR) agonists. However, early δOR full agonists caused seizures, limiting their clinical use. Partial δOR agonists may offer more controlled receptor activation than full agonists, but their development has been hindered by uncertainty regarding the molecular mechanism of partial agonism. Here we show that C6-Quino, a bitopic ligand developed through structure-based design, acts as a selective δOR partial agonist. Functional studies reveal that C6-Quino shows differential activity at G-protein and arrestin pathways and interacts with the sodium binding pocket, confirmed through cryo-EM analysis. C6-Quino demonstrates oral activity, analgesic activity in chronic pain models without causing δOR-related seizures and µOR-related adverse effects which have limited opioid usage in recent times. This discovery outlines a new strategy for developing δOR-targeted analgesics and provides a framework for optimizing signaling profiles of other Class A GPCRs.
History
DepositionJun 29, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 2, 2025Provider: repository / Type: Initial release
Revision 1.0Apr 2, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Apr 2, 2025Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Apr 2, 2025Data content type: Additional map / Part number: 2 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Apr 2, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 2, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 2, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Apr 2, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1May 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
A: Delta-type opioid receptor
E: ScFv16 protein
D: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
B: Guanine nucleotide-binding protein G(i) subunit alpha-1
C: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)146,4756
Polymers145,9615
Non-polymers5141
Water00
1


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

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Components

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

#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
#4: Protein Guanine nucleotide-binding protein G(i) subunit alpha-1 / Adenylate cyclase-inhibiting G alpha protein


Mass: 40414.047 Da / Num. of mol.: 1 / Mutation: S47N G203A E245A A326S
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, Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement
#5: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 37342.785 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

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

#1: Protein Delta-type opioid receptor / D-OR-1 / DOR-1


Mass: 33663.402 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: OPRD1, OPRD / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P41143
#2: Antibody ScFv16 protein


Mass: 26679.721 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Spodoptera frugiperda (fall armyworm)
#6: Chemical ChemComp-A1AWC / N-{6-[(4bS,8R,8aS,15bR)-1,8a-dihydroxy-5,6,8,8a,9,15b-hexahydro-7H-4,8-methano[1]benzofuro[3,2-c]pyrido[3,4-b]acridin-7-yl]hexyl}guanidine


Mass: 513.631 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C30H35N5O3 / 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

ComponentName: CryoEM structure of delta opioid receptor bound to G proteins and a partial agonist
Type: COMPLEX / Entity ID: #1-#5 / Source: MULTIPLE SOURCES
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-PROPANE

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 400 nm
Image recordingElectron dose: 47.4 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of real images: 4175

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Processing

EM software
IDNameVersionCategory
2cryoSPARC3.2image acquisition
8PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 718707 / Symmetry type: POINT
RefinementHighest resolution: 2.8 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0048681
ELECTRON MICROSCOPYf_angle_d0.70911810
ELECTRON MICROSCOPYf_dihedral_angle_d5.0561242
ELECTRON MICROSCOPYf_chiral_restr0.0451374
ELECTRON MICROSCOPYf_plane_restr0.0051483

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