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Yorodumi- EMDB-65622: Cryo-EM structure of human kappa opioid receptor -G protein signa... -
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Basic information
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| Title | Cryo-EM structure of human kappa opioid receptor -G protein signaling complex bound with U-50488H | |||||||||||||||
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Keywords | GPCR / G protein / signal transduction / opioid receptor / balanced agonist / MEMBRANE PROTEIN | |||||||||||||||
| Function / homology | Function and homology informationresponse to acrylamide / adenylate cyclase-inhibiting opioid receptor signaling pathway / dynorphin receptor activity / regulation of saliva secretion / negative regulation of luteinizing hormone secretion / sensory perception of temperature stimulus / positive regulation of eating behavior / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / positive regulation of dopamine secretion ...response to acrylamide / adenylate cyclase-inhibiting opioid receptor signaling pathway / dynorphin receptor activity / regulation of saliva secretion / negative regulation of luteinizing hormone secretion / sensory perception of temperature stimulus / positive regulation of eating behavior / G protein-coupled opioid receptor activity / G protein-coupled opioid receptor signaling pathway / positive regulation of dopamine secretion / sensory perception / maternal behavior / positive regulation of potassium ion transmembrane transport / receptor serine/threonine kinase binding / positive regulation of p38MAPK cascade / neuropeptide binding / eating behavior / conditioned place preference / neuropeptide signaling pathway / estrous cycle / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / MECP2 regulates neuronal receptors and channels / behavioral response to cocaine / T cell migration / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / response to prostaglandin E / adenylate cyclase regulator activity / G protein-coupled serotonin receptor binding / adenylate cyclase-inhibiting serotonin receptor signaling pathway / axon terminus / sensory perception of pain / T-tubule / cellular response to forskolin / regulation of mitotic spindle organization / Peptide ligand-binding receptors / sarcoplasmic reticulum / response to nicotine / Regulation of insulin secretion / locomotory behavior / cellular response to glucose stimulus / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / response to insulin / response to peptide hormone / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / response to estrogen / centriolar satellite / G-protein beta/gamma-subunit complex binding / 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 / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / 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 / photoreceptor disc membrane / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / GDP binding / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / synaptic vesicle membrane / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / ADP signalling through P2Y purinoceptor 1 / 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 / 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) / retina development in camera-type eye / cellular response to lipopolysaccharide / G protein activity / presynaptic membrane / GTPase binding / Ca2+ pathway / fibroblast proliferation / midbody Similarity search - Function | |||||||||||||||
| Biological species | Homo sapiens (human) / ![]() | |||||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.9 Å | |||||||||||||||
Authors | Suno-Ikeda C / Takai T / Hirose M / Inoue A / Sugita Y / Kato T / Kobayashi T / Suno R | |||||||||||||||
| Funding support | Japan, 4 items
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Citation | Journal: Nat Commun / Year: 2025Title: Structural and dynamic insights into the biased signaling mechanism of the human kappa opioid receptor. Authors: Chiyo Suno-Ikeda / Ryo Nishikawa / Riko Suzuki / Shun Yokoi / Seiya Iwata / Tomoyo Takai / Takaya Ogura / Mika Hirose / Akihisa Tokuda / Risako Katamoto / Akitoshi Inoue / Eri Asai / Ryoji ...Authors: Chiyo Suno-Ikeda / Ryo Nishikawa / Riko Suzuki / Shun Yokoi / Seiya Iwata / Tomoyo Takai / Takaya Ogura / Mika Hirose / Akihisa Tokuda / Risako Katamoto / Akitoshi Inoue / Eri Asai / Ryoji Kise / Yukihiko Sugita / Takayuki Kato / Hiroshi Nagase / Ayori Mitsutake / Tsuyoshi Saitoh / Kota Katayama / Asuka Inoue / Hideki Kandori / Takuya Kobayashi / Ryoji Suno / ![]() Abstract: The κ-opioid receptor (KOR) is a member of the G protein-coupled receptor (GPCR) family, modulating cellular responses through transducers such as G proteins and β-arrestins. G-protein-biased KOR ...The κ-opioid receptor (KOR) is a member of the G protein-coupled receptor (GPCR) family, modulating cellular responses through transducers such as G proteins and β-arrestins. G-protein-biased KOR agonists aim to retain analgesic and antipruritic actions while limiting aversion and sedation. Aiming to inform G-biased KOR agonist design, we analyze signaling-relevant residues from structural and dynamic views. Here we show, using multiple complementary methods, shared residues that determine β-arrestin recruitment by nalfurafine and U-50,488H. Cryo-electron microscopy structures of the KOR-G signaling complexes identify the ligand binding mode in the activated state. Vibrational spectroscopy reveals ligand-induced conformational changes. Cell-based mutant experiments pinpoint four amino acids (K227, C286, H291, and Y312; Ballesteros-Weinstein numbering is shown in superscript) that play crucial roles in β-arrestin recruitment. Furthermore, MD simulations revealed that the four mutants tend to adopt conformations with reduced β-arrestin recruitment activity. Our research findings provide a foundation for enhancing KOR-mediated therapeutic effects while minimizing unwanted side effects by targeting specific residues within the KOR ligand-binding pocket, including K227 and Y312, which have previously been implicated in biased signaling. | |||||||||||||||
| History |
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Structure visualization
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_65622.map.gz | 167.5 MB | EMDB map data format | |
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| Header (meta data) | emd-65622-v30.xml emd-65622.xml | 22 KB 22 KB | Display Display | EMDB header |
| Images | emd_65622.png | 24.8 KB | ||
| Filedesc metadata | emd-65622.cif.gz | 7 KB | ||
| Others | emd_65622_half_map_1.map.gz emd_65622_half_map_2.map.gz | 165.4 MB 165.4 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-65622 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-65622 | HTTPS FTP |
-Validation report
| Summary document | emd_65622_validation.pdf.gz | 838.1 KB | Display | EMDB validaton report |
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| Full document | emd_65622_full_validation.pdf.gz | 837.7 KB | Display | |
| Data in XML | emd_65622_validation.xml.gz | 14.8 KB | Display | |
| Data in CIF | emd_65622_validation.cif.gz | 17.6 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-65622 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-65622 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9w49MC ![]() 9v6oC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_65622.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.675 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: #1
| File | emd_65622_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #2
| File | emd_65622_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
-Entire : Kappa-type opioid receptor-Gi protein-bound U-50488
| Entire | Name: Kappa-type opioid receptor-Gi protein-bound U-50488 |
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| Components |
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-Supramolecule #1: Kappa-type opioid receptor-Gi protein-bound U-50488
| Supramolecule | Name: Kappa-type opioid receptor-Gi protein-bound U-50488 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5 |
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| Source (natural) | Organism: Homo sapiens (human) |
-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: Homo sapiens (human) |
| 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 UniProtKB: Guanine nucleotide-binding protein G(i) subunit alpha-1 |
-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: Homo sapiens (human) |
| Molecular weight | Theoretical: 37.728152 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD ...String: GPGSSGSELD QLRQEAEQLK NQIRDARKAC ADATLSQITN NIDPVGRIQM RTRRTLRGHL AKIYAMHWGT DSRLLVSASQ DGKLIIWDS YTTNKVHAIP LRSSWVMTCA YAPSGNYVAC GGLDNICSIY NLKTREGNVR VSRELAGHTG YLSCCRFLDD N QIVTSSGD TTCALWDIET GQQTTTFTGH TGDVMSLSLA PDTRLFVSGA CDASAKLWDV REGMCRQTFT GHESDINAIC FF PNGNAFA TGSDDATCRL FDLRADQELM TYSHDNIICG ITSVSFSKSG RLLLAGYDDF NCNVWDALKA DRAGVLAGHD NRV SCLGVT DDGMAVATGS WDSFLKIWN UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 |
-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: Homo sapiens (human) |
| Molecular weight | Theoretical: 7.861143 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L UniProtKB: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 |
-Macromolecule #4: Kappa-type opioid receptor
| Macromolecule | Name: Kappa-type opioid receptor / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 35.658414 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: LGSISPAIPV IITAVYSVVF VVGLVGNSLV MFVIIRYTKM KTATNIYIFN LALADALVTT TMPFQSTVYL MNSWPFGDVL CKIVLSIDY YNMFTSIFTL TMMSVDRYIA VCHPVKALDF RTPLKAKIIN ICIWLLSSSV GISAIVLGGT KVREDVDVIE C SLQFPDDD ...String: LGSISPAIPV IITAVYSVVF VVGLVGNSLV MFVIIRYTKM KTATNIYIFN LALADALVTT TMPFQSTVYL MNSWPFGDVL CKIVLSIDY YNMFTSIFTL TMMSVDRYIA VCHPVKALDF RTPLKAKIIN ICIWLLSSSV GISAIVLGGT KVREDVDVIE C SLQFPDDD YSWWDLFMKI CVFIFAFVIP VLIIIVCYTL MILRLKSVRL LSGSREKDRN LRRITRLVLV VVAVFVVCWT PI HIFILVE ALGSTSHSTA ALSSYYFCIA LGYTNSSLNP ILYAFLDENF KRCFRDFCFP LKMRMERQST SLEVLFQ UniProtKB: Kappa-type opioid receptor |
-Macromolecule #5: scFv16
| Macromolecule | Name: scFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: ![]() |
| Molecular weight | Theoretical: 27.318389 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: 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 KGENLYFQ |
-Macromolecule #6: 2-(3,4-dichlorophenyl)-~{N}-methyl-~{N}-[(1~{R},2~{R})-2-pyrrolid...
| Macromolecule | Name: 2-(3,4-dichlorophenyl)-~{N}-methyl-~{N}-[(1~{R},2~{R})-2-pyrrolidin-1-ylcyclohexyl]ethanamide type: ligand / ID: 6 / Number of copies: 1 / Formula: A1LWX |
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| Molecular weight | Theoretical: 369.329 Da |
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.7000000000000001 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
Japan, 4 items
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Processing
FIELD EMISSION GUN

