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- EMDB-25612: CryoEM structure of mu-opioid receptor - Gi protein complex bound... -

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Entry
Database: EMDB / ID: EMD-25612
TitleCryoEM structure of mu-opioid receptor - Gi protein complex bound to mitragynine pseudoindoxyl (MP)
Map dataCryoEM map of mu-opioid receptor / G protein complex bound to mitragynine pseudoindoxyl (MP).
Sample
  • Complex: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP).
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Soluble cytochrome b562,Mu-type opioid receptor
  • Ligand: Mitragynine pseudoindoxyl
  • Ligand: CHOLESTEROL
  • Ligand: water
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 / positive regulation of protein localization to cell cortex / neuropeptide signaling pathway / G-protein alpha-subunit binding / 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 binding / G protein-coupled receptor activity / 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 / Sensory perception of sweet, bitter, and umami (glutamate) taste / response to peptide hormone / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / 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 / heterotrimeric G-protein complex / Inactivation, recovery and regulation of the phototransduction cascade / 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 / positive regulation of cytosolic calcium ion concentration / G alpha (i) signalling events / 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
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 speciesMus musculus (house mouse) / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.5 Å
AuthorsSeven AB / Qu Q / Robertson MJ / Wang H / Kobilka BK / Skiniotis G
Funding support United States, 1 items
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, 2021-
Header (metadata) releaseDec 7, 2022-
Map releaseDec 7, 2022-
UpdateFeb 15, 2023-
Current statusFeb 15, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_25612.png

Downloads & links

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Map

FileDownload / File: emd_25612.map.gz / Format: CCP4 / Size: 28.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryoEM map of mu-opioid receptor / G protein complex bound to mitragynine pseudoindoxyl (MP).
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.82 Å/pix.
x 196 pix.
= 160.72 Å		0.82 Å/pix.
x 196 pix.
= 160.72 Å		0.82 Å/pix.
x 196 pix.
= 160.72 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.82 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.6
Minimum - Maximum-3.1943867 - 9.622821
Average (Standard dev.)0.027623937 (±0.24242888)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions196196196
Spacing196196196
CellA=B=C: 160.72 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Locally refined map of mu-opioid receptor.

Fileemd_25612_additional_1.map
AnnotationLocally refined map of mu-opioid receptor.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Locally refined map of G protein heterotrimer.

Fileemd_25612_additional_2.map
AnnotationLocally refined map of G protein heterotrimer.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : mu-opioid receptor / Gi protein complex bound to mitragynine pseu...

EntireName: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP).
Components
  • Complex: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP).
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Soluble cytochrome b562,Mu-type opioid receptor
  • Ligand: Mitragynine pseudoindoxyl
  • Ligand: CHOLESTEROL
  • Ligand: water

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Supramolecule #1: mu-opioid receptor / Gi protein complex bound to mitragynine pseu...

SupramoleculeName: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP).
type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: #1-#4
Details: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP).
Source (natural)Organism: Mus musculus (house mouse)

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

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.415031 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AREVKLLLLG AGESGKSTIV KQMKIIHEAG YSEEECKQYK AVVYSNTIQS IIAIIRAMG RLKIDFGDSA RADDARQLFV LAGAAEEGFM TAELAGVIKR LWKDSGVQAC FNRSREYQLN DSAAYYLNDL D RIAQPNYI PTQQDVLRTR VKTTGIVETH FTFKDLHFKM FDVGGQRSER KKWIHCFEGV TAIIFCVALS DYDLVLAEDE EM NRMHESM KLFDSICNNK WFTDTSIILF LNKKDLFEEK IKKSPLTICY PEYAGSNTYE EAAAYIQCQF EDLNKRKDTK EIY THFTCA TDTKNVQFVF DAVTDVIIKN NLKDCGLF

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Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.671102 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: PGSSGSELDQ LRQEAEQLKN QIRDARKACA DATLSQITNN IDPVGRIQMR TRRTLRGHLA KIYAMHWGTD SRLLVSASQD GKLIIWDSY TTNKVHAIPL RSSWVMTCAY APSGNYVACG GLDNICSIYN LKTREGNVRV SRELAGHTGY LSCCRFLDDN Q IVTSSGDT ...String:
PGSSGSELDQ LRQEAEQLKN QIRDARKACA DATLSQITNN IDPVGRIQMR TRRTLRGHLA KIYAMHWGTD SRLLVSASQD GKLIIWDSY TTNKVHAIPL RSSWVMTCAY APSGNYVACG GLDNICSIYN LKTREGNVRV SRELAGHTGY LSCCRFLDDN Q IVTSSGDT TCALWDIETG QQTTTFTGHT GDVMSLSLAP DTRLFVSGAC DASAKLWDVR EGMCRQTFTG HESDINAICF FP NGNAFAT GSDDATCRLF DLRADQELMT YSHDNIICGI TSVSFSKSGR LLLAGYDDFN CNVWDALKAD RAGVLAGHDN RVS CLGVTD DGMAVATGSW DSFLKIWN

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Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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Macromolecule #4: Soluble cytochrome b562,Mu-type opioid receptor

MacromoleculeName: Soluble cytochrome b562,Mu-type opioid receptor / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 55.123824 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: CLVFADYKDD DDALEVLFQG PADLEDNWET LNDNLKVIEK ADNAAQVKDA LTKMRAAALD AQKATPPKLE DKSPDSPEMK DFRHGFDIL VGQIDDALKL ANEGKVKEAQ AAAEQLKTTR NAYIQKYLAG SPGARSASSL ALAIAITALY SIVCVVGLFG N FLVMYVIV ...String:
CLVFADYKDD DDALEVLFQG PADLEDNWET LNDNLKVIEK ADNAAQVKDA LTKMRAAALD AQKATPPKLE DKSPDSPEMK DFRHGFDIL VGQIDDALKL ANEGKVKEAQ AAAEQLKTTR NAYIQKYLAG SPGARSASSL ALAIAITALY SIVCVVGLFG N FLVMYVIV RYTKMKTATN IYIFNLALAD ALATSTLPFQ SVNYLMGTWP FGNILCKIVI SIDYYNMFTS IFTLCTMSVD RY IAVCHPV KALDFRTPRN AKIVNVCNWI LSSAIGLPVM FMATTKYRQG SIDCTLTFSH PTWYWENLLK ICVFIFAFIM PVL IITVCY GLMILRLKSV RMLSGSKEKD RNLRRITRMV LVVVAVFIVC WTPIHIYVII KALITIPETT FQTVSWHFCI ALGY TNSCL NPVLYAFLDE NFKRCFREFC IPTSSTILEV LFQGPEQQNS ARIRQNTREH PSTANTVDRT NHQLENLEAE TAPLP DIHH HHHH

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Macromolecule #5: Mitragynine pseudoindoxyl

MacromoleculeName: Mitragynine pseudoindoxyl / type: ligand / ID: 5 / Number of copies: 1 / Formula: EIG
Molecular weightTheoretical: 414.495 Da
Chemical component information

ChemComp-EIG:
Mitragynine pseudoindoxyl / Mitragynine pseudoindoxyl

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Macromolecule #6: CHOLESTEROL

MacromoleculeName: CHOLESTEROL / type: ligand / ID: 6 / Number of copies: 2 / Formula: CLR
Molecular weightTheoretical: 386.654 Da
Chemical component information

ChemComp-CLR:
CHOLESTEROL / Cholesterol

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Macromolecule #7: water

MacromoleculeName: water / type: ligand / ID: 7 / Number of copies: 8 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER / Water

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 56.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 413821

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