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- EMDB-25612: CryoEM structure of mu-opioid receptor - Gi protein complex bound... -
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Open data
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Basic information
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Title | CryoEM structure of mu-opioid receptor - Gi protein complex bound to mitragynine pseudoindoxyl (MP) | |||||||||
![]() | CryoEM map of mu-opioid receptor / G protein complex bound to mitragynine pseudoindoxyl (MP). | |||||||||
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Function / homology | ![]() Opioid Signalling / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Seven AB / Qu Q / Robertson MJ / Wang H / Kobilka BK / Skiniotis G | |||||||||
Funding support | ![]()
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![]() | ![]() 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 |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 1.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 19.6 KB 19.6 KB | Display Display | ![]() |
Images | ![]() | 525 KB | ||
Others | ![]() ![]() | 3.4 MB 5.7 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7t2gMC ![]() 7t2hC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||
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Annotation | CryoEM map of mu-opioid receptor / G protein complex bound to mitragynine pseudoindoxyl (MP). | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.82 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: Locally refined map of mu-opioid receptor.
File | emd_25612_additional_1.map | ||||||||||||
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Annotation | Locally refined map of mu-opioid receptor. | ||||||||||||
Projections & Slices |
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Density Histograms |
-Additional map: Locally refined map of G protein heterotrimer.
File | emd_25612_additional_2.map | ||||||||||||
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Annotation | Locally refined map of G protein heterotrimer. | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
-Entire : mu-opioid receptor / Gi protein complex bound to mitragynine pseu...
Entire | Name: mu-opioid receptor / Gi protein complex bound to mitragynine pseudoindoxyl (MP). |
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Components |
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-Supramolecule #1: mu-opioid receptor / Gi protein complex bound to mitragynine pseu...
Supramolecule | Name: 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). |
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Source (natural) | Organism: ![]() ![]() ![]() |
-Macromolecule #1: Guanine nucleotide-binding protein G(i) subunit alpha-1
Macromolecule | Name: Guanine nucleotide-binding protein G(i) subunit alpha-1 type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 40.415031 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: 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 |
-Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Macromolecule | Name: 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 |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 37.671102 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: 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 |
-Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Macromolecule | Name: 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 |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 7.861143 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L |
-Macromolecule #4: Soluble cytochrome b562,Mu-type opioid receptor
Macromolecule | Name: Soluble cytochrome b562,Mu-type opioid receptor / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 55.123824 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: 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 |
-Macromolecule #5: Mitragynine pseudoindoxyl
Macromolecule | Name: Mitragynine pseudoindoxyl / type: ligand / ID: 5 / Number of copies: 1 / Formula: EIG |
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Molecular weight | Theoretical: 414.495 Da |
Chemical component information | ![]() ChemComp-EIG: |
-Macromolecule #6: CHOLESTEROL
Macromolecule | Name: CHOLESTEROL / type: ligand / ID: 6 / Number of copies: 2 / Formula: CLR |
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Molecular weight | Theoretical: 386.654 Da |
Chemical component information | ![]() ChemComp-CLR: |
-Macromolecule #7: water
Macromolecule | Name: water / type: ligand / ID: 7 / Number of copies: 8 / Formula: HOH |
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Molecular weight | Theoretical: 18.015 Da |
Chemical component information | ![]() ChemComp-HOH: |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film 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 assignment | Type: OTHER |
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Final angle assignment | Type: OTHER |
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 413821 |