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- EMDB-66177: GRM1-Gq Complex Structure -

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Basic information

Entry
Database: EMDB / ID: EMD-66177
TitleGRM1-Gq Complex Structure
Map data
Sample
  • Complex: GRM1-Gq complex
    • Protein or peptide: Metabotropic glutamate receptor 1
    • Protein or peptide: miniGq
    • 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
  • Ligand: GAMMA-L-GLUTAMIC ACID
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: CHLORIDE ION
  • Ligand: CHOLESTEROL
  • Ligand: N-[4-(trifluoromethyl)-1,3-oxazol-2-yl]-9H-xanthene-9-carboxamide
KeywordsReceptor complex / MEMBRANE PROTEIN
Function / homology
Function and homology information


dendriole / : / G protein-coupled receptor dimeric complex / G protein-coupled receptor homodimeric complex / : / G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential / cellular response to electrical stimulus / synaptic signaling via neuropeptide / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway ...dendriole / : / G protein-coupled receptor dimeric complex / G protein-coupled receptor homodimeric complex / : / G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential / cellular response to electrical stimulus / synaptic signaling via neuropeptide / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway / regulation of sensory perception of pain / L-glutamate import across plasma membrane / G protein-coupled glutamate receptor signaling pathway / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / Neurexins and neuroligins / regulation of synaptic transmission, glutamatergic / sensory perception of pain / locomotory behavior / postsynaptic density membrane / G protein-coupled receptor activity / Schaffer collateral - CA1 synapse / 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 / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / 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 / 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 / heterotrimeric G-protein complex / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / extracellular vesicle / sensory perception of taste / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / retina development in camera-type eye / GTPase binding / fibroblast proliferation / Ca2+ pathway / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / chemical synaptic transmission / Ras protein signal transduction / positive regulation of MAPK cascade / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / glutamatergic synapse / signal transduction / extracellular exosome / membrane / nucleus / plasma membrane / cytoplasm / cytosol
Similarity search - Function
GPCR, family 3, metabotropic glutamate receptor 1 / Metabotropic glutamate receptor, Homer-binding domain / Homer-binding domain of metabotropic glutamate receptor / GluR_Homer-bdg / GPCR, family 3, metabotropic glutamate receptor / : / G-protein coupled receptors family 3 signature 1. / G-protein coupled receptors family 3 signature 3. / G-protein coupled receptors family 3 signature 2. / GPCR, family 3, nine cysteines domain ...GPCR, family 3, metabotropic glutamate receptor 1 / Metabotropic glutamate receptor, Homer-binding domain / Homer-binding domain of metabotropic glutamate receptor / GluR_Homer-bdg / GPCR, family 3, metabotropic glutamate receptor / : / G-protein coupled receptors family 3 signature 1. / G-protein coupled receptors family 3 signature 3. / G-protein coupled receptors family 3 signature 2. / GPCR, family 3, nine cysteines domain / GPCR, family 3, nine cysteines domain superfamily / Nine Cysteines Domain of family 3 GPCR / GPCR, family 3, conserved site / GPCR, family 3 / G-protein coupled receptors family 3 profile. / GPCR family 3, C-terminal / 7 transmembrane sweet-taste receptor of 3 GCPR / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I / 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 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
Similarity search - Domain/homology
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 / Metabotropic glutamate receptor 1
Similarity search - Component
Biological speciesHomo sapiens (human) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsLu Y / Wen TL / Shen YQ / Yang X
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: To Be Published
Title: GRM1-Gq Complex Structure
Authors: Lu Y / Wen TL / Shen YQ / Yang X
History
DepositionSep 11, 2025-
Header (metadata) releaseMay 27, 2026-
Map releaseMay 27, 2026-
UpdateMay 27, 2026-
Current statusMay 27, 2026Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_66177.png

Downloads & links

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Map

FileDownload / File: emd_66177.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.93 Å/pix.
x 384 pix.
= 357.12 Å		0.93 Å/pix.
x 384 pix.
= 357.12 Å		0.93 Å/pix.
x 384 pix.
= 357.12 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.93 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.002
Minimum - Maximum-0.003018945 - 0.030579422
Average (Standard dev.)0.000033338532 (±0.0004970775)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 357.12 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : GRM1-Gq complex

EntireName: GRM1-Gq complex
Components
  • Complex: GRM1-Gq complex
    • Protein or peptide: Metabotropic glutamate receptor 1
    • Protein or peptide: miniGq
    • 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
  • Ligand: GAMMA-L-GLUTAMIC ACID
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: CHLORIDE ION
  • Ligand: CHOLESTEROL
  • Ligand: N-[4-(trifluoromethyl)-1,3-oxazol-2-yl]-9H-xanthene-9-carboxamide

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Supramolecule #1: GRM1-Gq complex

SupramoleculeName: GRM1-Gq complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 300 KDa

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Macromolecule #1: Metabotropic glutamate receptor 1

MacromoleculeName: Metabotropic glutamate receptor 1 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 97.322344 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DYKDDDDKTG ASSQRSVARM DGDVIIGALF SVHHQPPAEK VPERKCGEIR EQYGIQRVEA MFHTLDKINA DPVLLPNITL GSEIRDSCW HSSVALEQSI EFIRDSLISI RDEKDGINRC LPDGQSLPPG RTKKPIAGVI GPGSSSVAIQ VQNLLQLFDI P QIAYSATS ...String:
DYKDDDDKTG ASSQRSVARM DGDVIIGALF SVHHQPPAEK VPERKCGEIR EQYGIQRVEA MFHTLDKINA DPVLLPNITL GSEIRDSCW HSSVALEQSI EFIRDSLISI RDEKDGINRC LPDGQSLPPG RTKKPIAGVI GPGSSSVAIQ VQNLLQLFDI P QIAYSATS IDLSDKTLYK YFLRVVPSDT LQARAMLDIV KRYNWTYVSA VHTEGNYGES GMDAFKELAA QEGLCIAHSD KI YSNAGEK SFDRLLRKLR ERLPKARVVV CFCEGMTVRG LLSAMRRLGV VGEFSLIGSD GWADRDEVIE GYEVEANGGI TIK LQSPEV RSFDDYFLKL RLDTNTRNPW FPEFWQHRFQ CRLPGHLLEN PNFKRICTGN ESLEENYVQD SKMGFVINAI YAMA HGLQN MHHALCPGHV GLCDAMKPID GSKLLDFLIK SSFIGVSGEE VWFDEKGDAP GRYDIMNLQY TEANRYDYVH VGTWH EGVL NIDDYKIQMN KSGVVRSVCS EPCLKGQIKV IRKGEVSCCW ICTACKENEY VQDEFTCKAC DLGWWPNADL TGCEPI PVR YLEWSNIESI IAIAFSCLGI LVTLFVTLIF VLYRDTPVVK SSSRELCYII LAGIFLGYVC PFTLIAKPTT TSCYLQR LL VGLSSAMCYS ALVTKTNRIA RILAGSKKKI CTRKPRFMSA WAQVIIASIL ISVQLTLVVT LIIMEPPMPI LSYPSIKE V YLICNTSNLG VVAPLGYNGL LIMSCTYYAF KTRNVPANFN EAKYIAFTMY TTCIIWLAFV PIYFGSNYKI ITTCFAVSL SVTVALGCMF TPKMYIIIAK PERNVRSAFT TSDVVRMHVG DGKLPCRSNT FLNIFRRKKA GAGNANSNG

UniProtKB: Metabotropic glutamate receptor 1

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Macromolecule #2: miniGq

MacromoleculeName: miniGq / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.084832 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGSTVSAEDK AAAERSKMID KNLREDGEKA RRTLRLLLLG ADNSGKSTIV KQMRILHGGS GGSGGTSGIF ETKFQVDKVN FHMFDVGGQ RDERRKWIQC FNDVTAIIFV VDSSDYNRLQ EALNDFKSIW NNRWLRTISV ILFLNKQDLL AEKVLAGKSK I EDYFPEFA ...String:
MGSTVSAEDK AAAERSKMID KNLREDGEKA RRTLRLLLLG ADNSGKSTIV KQMRILHGGS GGSGGTSGIF ETKFQVDKVN FHMFDVGGQ RDERRKWIQC FNDVTAIIFV VDSSDYNRLQ EALNDFKSIW NNRWLRTISV ILFLNKQDLL AEKVLAGKSK I EDYFPEFA RYTTPEDATP EPGEDPRVTR AKYFIRKEFV DISTASGDGR HICYPHFTCA VDTENARRIF NDCKDIILQM NL REYNLV

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Macromolecule #3: 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: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.41693 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL ...String:
MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL WDIETGQQTT TFTGHTGDVM SLSLAPDTRL FVSGACDASA KLWDVREGMC RQTFTGHESD INAICFFPNG NA FATGSDD ATCRLFDLRA DQELMTYSHD NIICGITSVS FSKSGRLLLA GYDDFNCNVW DALKADRAGV LAGHDNRVSC LGV TDDGMA VATGSWDSFL KIWN

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

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Macromolecule #4: 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: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 8.506765 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI LGSAGSAGSA

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

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Macromolecule #5: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 27.720795 KDa
Recombinant expressionOrganism: Homo sapiens (human)
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 KAAAASSEDL YFQ

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Macromolecule #6: GAMMA-L-GLUTAMIC ACID

MacromoleculeName: GAMMA-L-GLUTAMIC ACID / type: ligand / ID: 6 / Number of copies: 2 / Formula: GGL
Molecular weightTheoretical: 147.129 Da
Chemical component information

ChemComp-GGL:
GAMMA-L-GLUTAMIC ACID

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Macromolecule #7: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 7 / Number of copies: 8 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #8: CHLORIDE ION

MacromoleculeName: CHLORIDE ION / type: ligand / ID: 8 / Number of copies: 2 / Formula: CL
Molecular weightTheoretical: 35.453 Da

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Macromolecule #9: CHOLESTEROL

MacromoleculeName: CHOLESTEROL / type: ligand / ID: 9 / Number of copies: 7 / Formula: CLR
Molecular weightTheoretical: 386.654 Da
Chemical component information

ChemComp-CLR:
CHOLESTEROL

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Macromolecule #10: N-[4-(trifluoromethyl)-1,3-oxazol-2-yl]-9H-xanthene-9-carboxamide

MacromoleculeName: N-[4-(trifluoromethyl)-1,3-oxazol-2-yl]-9H-xanthene-9-carboxamide
type: ligand / ID: 10 / Number of copies: 1 / Formula: A1EX5
Molecular weightTheoretical: 360.287 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

Concentration5 mg/mL
BufferpH: 7.2
VitrificationCryogen name: ETHANE / Chamber humidity: 100 %

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 19.0 µm / Nominal defocus min: 6.0 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: CTFFIND (ver. 4) / Type: NONE
Startup modelType of model: OTHER / Details: CryoSPARC Ab initio
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 5) / Number images used: 206725
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION

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