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- EMDB-70071: CryoEM structure of mu-opioid receptor - Gi protein complex bound... -

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Basic information

Entry
Database: EMDB / ID: EMD-70071
TitleCryoEM structure of mu-opioid receptor - Gi protein complex bound to fluornitrazene (FNZ)
Map data
Sample
  • Complex: MOR-Gi heterotrimer complex
    • 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: scFv16
    • Protein or peptide: Mu-type opioid receptor
  • Ligand: N,N-diethyl-2-(2-{[4-(2-fluoroethoxy)phenyl]methyl}-5-nitro-1H-1,3-benzimidazol-1-yl)ethan-1-amine
KeywordsComplex / Receptor / Agonist / MOR / MEMBRANE PROTEIN
Function / homology
Function and homology information


Opioid Signalling / spine apparatus / positive regulation of appetite / sperm ejaculation / G-protein activation / adenylate cyclase-inhibiting opioid receptor signaling pathway / Peptide ligand-binding receptors / beta-endorphin receptor activity / morphine receptor activity / negative regulation of Wnt protein secretion ...Opioid Signalling / spine apparatus / positive regulation of appetite / sperm ejaculation / G-protein activation / adenylate cyclase-inhibiting opioid receptor signaling pathway / Peptide ligand-binding receptors / beta-endorphin receptor activity / morphine receptor activity / negative regulation of Wnt protein secretion / negative regulation of luteinizing hormone secretion / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / regulation of cellular response to stress / G alpha (i) signalling events / negative regulation of nitric oxide biosynthetic process / negative regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / adenylate cyclase-inhibiting G protein-coupled acetylcholine receptor signaling pathway / behavioral response to ethanol / regulation of NMDA receptor activity / neuropeptide binding / positive regulation of neurogenesis / eating behavior / negative regulation of cytosolic calcium ion concentration / transmission of nerve impulse / G-protein alpha-subunit binding / social behavior / voltage-gated calcium channel activity / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / T cell migration / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / G protein-coupled serotonin receptor binding / T-tubule / sensory perception of pain / positive regulation of gluconeogenesis / dendrite membrane / cellular response to forskolin / presynaptic modulation of chemical synaptic transmission / dendrite cytoplasm / regulation of mitotic spindle organization / chemokine-mediated signaling pathway / sarcoplasmic reticulum / Regulation of insulin secretion / neuropeptide signaling pathway / excitatory postsynaptic potential / locomotory behavior / response to prostaglandin E / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / sarcolemma / response to peptide hormone / G protein-coupled receptor activity / GABA-ergic synapse / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / centriolar satellite / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / 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 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / 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 / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / extracellular vesicle / sensory perception of taste / adenylate cyclase-activating G protein-coupled receptor signaling pathway
Similarity search - Function
Mu opioid receptor / Opioid receptor / G-protein alpha subunit, group I / 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. ...Mu opioid receptor / Opioid receptor / G-protein alpha subunit, group I / 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
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) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.3 Å
AuthorsRobertson MJ / Skiniotis G
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: Nature / Year: 2026
Title: A mu-opioid receptor superagonist analgesic with minimal adverse effects
Authors: Gomez JL / Ventriglia EN / Frangos ZJ / Sulima A / Robertson MJ / Sacco M / Budinich R / Giosan I / Solis O / Tischer AE / Bossert JM / Caldwell KE / Bonbrest H / Essmann A / Garcon-Poca MZ ...Authors: Gomez JL / Ventriglia EN / Frangos ZJ / Sulima A / Robertson MJ / Sacco M / Budinich R / Giosan I / Solis O / Tischer AE / Bossert JM / Caldwell KE / Bonbrest H / Essmann A / Garcon-Poca MZ / Choi S / Noya MR / Glatfelter G / Robinson M / Mullarkey AA / Brademan DR / Enten G / Dunne W / Schoenborn I / Paule J / Rais R / Holt DP / Dannals RF / Tanda G / Newman AH / Shi L / Huttenhain R / Ferre S / Kiyatkin E / Bonaventura J / Shaham Y / Zachariou V / Baumann MH / Skiniotis G / Rice KC / Michaelides M
History
DepositionApr 5, 2025-
Header (metadata) releaseApr 1, 2026-
Map releaseApr 1, 2026-
UpdateApr 1, 2026-
Current statusApr 1, 2026Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_70071.png

Downloads & links

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Map

FileDownload / File: emd_70071.map.gz / Format: CCP4 / Size: 209.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesX (Sec.)Y (Row.)Z (Col.)
0.86 Å/pix.
x 380 pix.
= 326.8 Å		0.86 Å/pix.
x 380 pix.
= 326.8 Å		0.86 Å/pix.
x 380 pix.
= 326.8 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.86 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 9.890000000000001
Minimum - Maximum-46.000903999999998 - 73.723249999999993
Average (Standard dev.)0.0021159062 (±1.0933447)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderZYX
Origin000
Dimensions380380380
Spacing380380380
CellA=B=C: 326.80002 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : MOR-Gi heterotrimer complex

EntireName: MOR-Gi heterotrimer complex
Components
  • Complex: MOR-Gi heterotrimer complex
    • 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: scFv16
    • Protein or peptide: Mu-type opioid receptor
  • Ligand: N,N-diethyl-2-(2-{[4-(2-fluoroethoxy)phenyl]methyl}-5-nitro-1H-1,3-benzimidazol-1-yl)ethan-1-amine

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Supramolecule #1: MOR-Gi heterotrimer complex

SupramoleculeName: MOR-Gi heterotrimer complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)

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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: Trichoplusia ni (cabbage looper)
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

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

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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: Trichoplusia ni (cabbage looper)
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

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

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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: Trichoplusia ni (cabbage looper)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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

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Macromolecule #4: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 27.784896 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...String:
DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL KAAAHHHHHH HH

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Macromolecule #5: Mu-type opioid receptor

MacromoleculeName: Mu-type opioid receptor / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 47.910758 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MKTIIALSYI FCLVFADYKD DDDAMGPGNI SDCSDPLAPA SCSPAPGSWL NLSHVDGNQS DPCGPNRTGL GGSHSLCPQT GSPSMVTAI TIMALYSIVC VVGLFGNFLV MYVIVRYTKM KTATNIYIFN LALADALATS TLPFQSVNYL MGTWPFGNIL C KIVISIDY ...String:
MKTIIALSYI FCLVFADYKD DDDAMGPGNI SDCSDPLAPA SCSPAPGSWL NLSHVDGNQS DPCGPNRTGL GGSHSLCPQT GSPSMVTAI TIMALYSIVC VVGLFGNFLV MYVIVRYTKM KTATNIYIFN LALADALATS TLPFQSVNYL MGTWPFGNIL C KIVISIDY YNMFTSIFTL CTMSVDRYIA VCHPVKALDF RTPRNAKIVN VCNWILSSAI GLPVMFMATT KYRQGSIDCT LT FSHPTWY WENLLKICVF IFAFIMPVLI ITVCYGLMIL RLKSVRMLSG SKEKDRNLRR ITRMVLVVVA VFIVCWTPIH IYV IIKALI TIPETTFQTV SWHFCIALGY TNSCLNPVLY AFLDENFKRC FREFCIPTSS TIEQQNSARI RQNTREHPST ANTV DRTNH QLENLEAETA PLPDIHHHHH H

UniProtKB: Mu-type opioid receptor

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Macromolecule #6: N,N-diethyl-2-(2-{[4-(2-fluoroethoxy)phenyl]methyl}-5-nitro-1H-1,...

MacromoleculeName: N,N-diethyl-2-(2-{[4-(2-fluoroethoxy)phenyl]methyl}-5-nitro-1H-1,3-benzimidazol-1-yl)ethan-1-amine
type: ligand / ID: 6 / Number of copies: 1 / Formula: A1B79
Molecular weightTheoretical: 414.473 Da

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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: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 56.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.6 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.3 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 667110
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION

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