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- PDB-7t2g: CryoEM structure of mu-opioid receptor - Gi protein complex bound... -

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Basic information

Entry
Database: PDB / ID: 7t2g
TitleCryoEM structure of mu-opioid receptor - Gi protein complex bound to mitragynine pseudoindoxyl (MP)
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Soluble cytochrome b562,Mu-type opioid receptor
KeywordsMEMBRANE PROTEIN / GPCR / mu-opioid receptor / lofentanil (LFT) / mitragynine pseudoindoxyl (MP)
Function / homology
Function and homology information


Opioid Signalling / spine apparatus / beta-endorphin receptor activity / morphine receptor activity / negative regulation of Wnt protein secretion / negative regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / Peptide ligand-binding receptors / adenylate cyclase-inhibiting opioid receptor signaling pathway / positive regulation of appetite / G-protein activation ...Opioid Signalling / spine apparatus / beta-endorphin receptor activity / morphine receptor activity / negative regulation of Wnt protein secretion / negative regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / Peptide ligand-binding receptors / adenylate cyclase-inhibiting opioid receptor signaling pathway / positive regulation of appetite / G-protein activation / G protein-coupled opioid receptor activity / filamin binding / G protein-coupled opioid receptor signaling pathway / regulation of cellular response to stress / G alpha (i) signalling events / adenylate cyclase-inhibiting G protein-coupled acetylcholine receptor signaling pathway / behavioral response to ethanol / negative regulation of nitric oxide biosynthetic process / neuropeptide binding / negative regulation of cAMP-mediated signaling / positive regulation of neurogenesis / eating behavior / negative regulation of cytosolic calcium ion concentration / transmission of nerve impulse / regulation of NMDA receptor activity / Adenylate cyclase inhibitory pathway / neuropeptide signaling pathway / G-protein alpha-subunit binding / positive regulation of protein localization to cell cortex / GABA-ergic synapse / voltage-gated calcium channel activity / regulation of cAMP-mediated signaling / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding / positive regulation of cAMP-mediated signaling / regulation of mitotic spindle organization / cellular response to forskolin / sensory perception of pain / dendrite membrane / excitatory postsynaptic potential / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / presynaptic modulation of chemical synaptic transmission / dendrite cytoplasm / locomotory behavior / Regulation of insulin secretion / G protein-coupled receptor activity / G protein-coupled receptor binding / Olfactory Signaling Pathway / G-protein beta/gamma-subunit complex binding / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein activation / G protein-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / response to peptide hormone / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / adenylate cyclase-activating dopamine receptor signaling pathway / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / sensory perception of taste / GPER1 signaling / G-protein beta-subunit binding / GDP binding / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / positive regulation of nitric oxide biosynthetic process / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / GTPase binding / presynaptic membrane / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / cell cortex / midbody / G alpha (i) signalling events / positive regulation of cytosolic calcium ion concentration / fibroblast proliferation
Similarity search - Function
Mu opioid receptor / Opioid receptor / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / G-protein alpha subunit, group I / G-alpha domain profile. / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit ...Mu opioid receptor / Opioid receptor / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / G-protein alpha subunit, group I / G-alpha domain profile. / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily / G-protein gamma-like domain / GGL domain / G protein gamma subunit-like motifs / 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 / WD40 repeats / WD40 repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
CHOLESTEROL / Mitragynine pseudoindoxyl / Soluble cytochrome b562 / Mu-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)
Escherichia coli (E. coli)
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.5 Å
AuthorsSeven, A.B. / Qu, Q. / Robertson, M.J. / Wang, H. / Kobilka, B.K. / Skiniotis, G.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01 NS092695 United States
CitationJournal: Nat Chem Biol / Year: 2023
Title: Insights into distinct signaling profiles of the µOR activated by diverse agonists.
Authors: Qianhui Qu / Weijiao Huang / Deniz Aydin / Joseph M Paggi / Alpay B Seven / Haoqing Wang / Soumen Chakraborty / Tao Che / Jeffrey F DiBerto / Michael J Robertson / Asuka Inoue / Carl-Mikael ...Authors: Qianhui Qu / Weijiao Huang / Deniz Aydin / Joseph M Paggi / Alpay B Seven / Haoqing Wang / Soumen Chakraborty / Tao Che / Jeffrey F DiBerto / Michael J Robertson / Asuka Inoue / Carl-Mikael Suomivuori / Bryan L Roth / Susruta Majumdar / Ron O Dror / Brian K Kobilka / Georgios Skiniotis /
Abstract: Drugs targeting the μ-opioid receptor (μOR) are the most effective analgesics available but are also associated with fatal respiratory depression through a pathway that remains unclear. Here we ...Drugs targeting the μ-opioid receptor (μOR) are the most effective analgesics available but are also associated with fatal respiratory depression through a pathway that remains unclear. Here we investigated the mechanistic basis of action of lofentanil (LFT) and mitragynine pseudoindoxyl (MP), two μOR agonists with different safety profiles. LFT, one of the most lethal opioids, and MP, a kratom plant derivative with reduced respiratory depression in animal studies, exhibited markedly different efficacy profiles for G protein subtype activation and β-arrestin recruitment. Cryo-EM structures of μOR-Gi1 complex with MP (2.5 Å) and LFT (3.2 Å) revealed that the two ligands engage distinct subpockets, and molecular dynamics simulations showed additional differences in the binding site that promote distinct active-state conformations on the intracellular side of the receptor where G proteins and β-arrestins bind. These observations highlight how drugs engaging different parts of the μOR orthosteric pocket can lead to distinct signaling outcomes.
History
DepositionDec 4, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 7, 2022Provider: repository / Type: Initial release
Revision 1.1Dec 14, 2022Group: Database references / Category: citation / Item: _citation.title
Revision 2.0Feb 15, 2023Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Refinement description / Structure summary
Category: atom_site / audit_author ...atom_site / audit_author / entity / pdbx_contact_author / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_poly_seq_scheme / software / struct_asym
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_alt_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.occupancy / _atom_site.pdbx_formal_charge / _atom_site.type_symbol / _entity.formula_weight / _entity.pdbx_description / _entity.pdbx_number_of_molecules / _pdbx_entity_nonpoly.comp_id / _pdbx_entity_nonpoly.name / _pdbx_nonpoly_scheme.auth_mon_id / _pdbx_nonpoly_scheme.auth_seq_num / _pdbx_nonpoly_scheme.entity_id / _pdbx_nonpoly_scheme.mon_id / _pdbx_nonpoly_scheme.pdb_mon_id / _pdbx_poly_seq_scheme.auth_mon_id / _struct_asym.entity_id
Description: Missing anisotropic B-factor / Details: B-factor values are included. / Provider: author / Type: Coordinate replacement

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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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,Mu-type opioid receptor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)142,2597
Polymers141,0714
Non-polymers1,1883
Water1448
1


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

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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 / Adenylate cyclase-inhibiting G alpha protein


Mass: 40415.031 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 / Transducin beta chain 1


Mass: 37671.102 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) / Strain (production host): GNG2 / References: UniProt: P59768

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Protein , 1 types, 1 molecules R

#4: Protein Soluble cytochrome b562,Mu-type opioid receptor / Cytochrome b-562 / M-OR-1 / MOR-1


Mass: 55123.824 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli), (gene. exp.) Mus musculus (house mouse)
Gene: cybC, Oprm1, Mor, Oprm / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P0ABE7, UniProt: P42866

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Non-polymers , 3 types, 11 molecules

#5: Chemical ChemComp-EIG / Mitragynine pseudoindoxyl / methyl (2E)-4-[(2S,2'S)-1'-butyl-4-methoxy-3-oxo-1,3-dihydrospiro[indole-2,3'-pyrrolidin]-2'-yl]-2-(methoxymethylidene)butanoate / Mitragynine pseudoindoxyl


Mass: 414.495 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C23H30N2O5 / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical ChemComp-CLR / CHOLESTEROL / Cholesterol


Mass: 386.654 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C27H46O
#7: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 8 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY

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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: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP).
Type: COMPLEX
Details: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP).
Entity ID: #1-#4 / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Mus musculus (house mouse)
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 56 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

Software
NameVersionClassification
phenix.real_space_refinedev_4788refinement
PHENIXdev_4788refinement
EM softwareName: SerialEM / Category: image acquisition
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 413821 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0027002
ELECTRON MICROSCOPYf_angle_d0.4489533
ELECTRON MICROSCOPYf_dihedral_angle_d4.39975
ELECTRON MICROSCOPYf_chiral_restr0.0391128
ELECTRON MICROSCOPYf_plane_restr0.0031185

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