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Yorodumi- EMDB-72399: Cryo EM Structure of Full lengthmGluR8 Bound to Agonist L-AP4 and... -
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Basic information
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| Title | Cryo EM Structure of Full lengthmGluR8 Bound to Agonist L-AP4 and PAM VU6005649 in complex with G proteins | ||||||||||||
Map data | mGluR8-G protein complex with agonist (L-AP4) and PAM (VU600) composite map | ||||||||||||
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Keywords | GPCR / metabotropic glutamate receptor / membrane protein / synaptic protein / signaling protein | ||||||||||||
| Function / homology | Function and homology informationgroup III metabotropic glutamate receptor activity / adenylate cyclase-inhibiting G protein-coupled glutamate receptor signaling pathway / G protein-coupled glutamate receptor signaling pathway / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / visual perception / regulation of synaptic transmission, glutamatergic / regulation of eating behavior / adenylate cyclase inhibitor activity / T cell migration ...group III metabotropic glutamate receptor activity / adenylate cyclase-inhibiting G protein-coupled glutamate receptor signaling pathway / G protein-coupled glutamate receptor signaling pathway / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / visual perception / regulation of synaptic transmission, glutamatergic / regulation of eating behavior / adenylate cyclase inhibitor activity / T cell migration / positive regulation of protein localization to cell cortex / positive regulation of relaxation of smooth muscle / Adenylate cyclase inhibitory pathway / D2 dopamine receptor binding / adenylate cyclase-inhibiting dopamine receptor signaling pathway / adenylate cyclase-inhibiting serotonin receptor signaling pathway / G protein-coupled serotonin receptor binding / regulation of G protein-coupled receptor signaling pathway / cellular response to forskolin / regulation of mitotic spindle organization / mast cell degranulation / chemokine-mediated signaling pathway / establishment of mitotic spindle orientation / neuropeptide signaling pathway / Regulation of insulin secretion / response to prostaglandin E / positive regulation of cholesterol biosynthetic process / G protein-coupled receptor binding / response to peptide hormone / G protein-coupled receptor activity / G-protein beta/gamma-subunit complex binding / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating 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 / GDP binding / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / photoreceptor disc membrane / G beta:gamma signalling through BTK / 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 / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADP signalling through P2Y purinoceptor 1 / cellular response to catecholamine stimulus / G beta:gamma signalling through PI3Kgamma / ADORA2B mediated anti-inflammatory cytokines production / adenylate cyclase-activating dopamine receptor signaling pathway / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / 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 / Thrombin signalling through proteinase activated receptors (PARs) / adenylate cyclase-activating G protein-coupled receptor signaling pathway / signaling receptor complex adaptor activity / spindle pole / ciliary basal body / GTPase binding / midbody / G protein activity / cell cortex / 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 / G alpha (q) signalling events / cell division / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / cytoplasmic side of plasma membrane / Ras protein signal transduction / Extra-nuclear estrogen signaling / G protein-coupled receptor signaling pathway / lysosomal membrane / centrosome / GTPase activity / GTP binding / synapse / protein-containing complex binding / magnesium ion binding / signal transduction / extracellular exosome / membrane / nucleus Similarity search - Function | ||||||||||||
| Biological species | Homo sapiens (human) / ![]() | ||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 6.18 Å | ||||||||||||
Authors | Marx DC / Levitz JT | ||||||||||||
| Funding support | United States, 3 items
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Citation | Journal: Nat Commun / Year: 2026Title: Structural basis of active state coupling of metabotropic glutamate receptor 8 to beta-arrestins. Authors: Dagan C Marx / Kevin Huynh / Alberto J Gonzalez-Hernandez / Alexa Strauss / Carlos Rico / Pamela N Gallo / Sheida Sharghi Moshtaghin / Anisul Arefin / Johannes Broichhagen / David Eliezer / ...Authors: Dagan C Marx / Kevin Huynh / Alberto J Gonzalez-Hernandez / Alexa Strauss / Carlos Rico / Pamela N Gallo / Sheida Sharghi Moshtaghin / Anisul Arefin / Johannes Broichhagen / David Eliezer / George Khelashvili / Joshua Levitz / ![]() Abstract: Metabotropic glutamate receptors (mGluRs) are prototypical, dimeric family C G protein-coupled receptors (GPCR) that perform crucial modulatory roles throughout the nervous system. While mGluR ...Metabotropic glutamate receptors (mGluRs) are prototypical, dimeric family C G protein-coupled receptors (GPCR) that perform crucial modulatory roles throughout the nervous system. While mGluR activation and signaling through G proteins has been studied extensively, how these receptors interact with and are desensitized by β-arrestins (β-arrs) is not well understood. Here, we use an integrative biophysical and structural approach to probe the coupling of mGluR8 and β-arrs. Using negative stain electron microscopy (EM), we identify tail- and core-bound orientations and stoichiometries of mGluR8/β-arr complexes. Cryo-EM structures of mGluR8 alone or bound to either G proteins or β-arr1 reveal mGluR8 active states with transducer-specific differences. The mGluR8/β-arr structure shows a distinct complex orientation compared to other GPCR/β-arr structures which supports a steric mechanism of mGluR desensitization involving interactions with both subunits and the lipid bilayer. Coupling of mGluR8 to β-arr1 in an active-like conformation is verified by live-cell and single molecule FRET analysis. Finally, molecular dynamics simulations further define the positioning and dynamics of mGluR8-bound β-arr1 and the importance of critical mGluR8 residues for stabilizing β-arr1 complexes. Together, our data provide a framework for agonist-driven family C GPCR/β-arr coupling. | ||||||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_72399.map.gz | 475.2 MB | EMDB map data format | |
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| Header (meta data) | emd-72399-v30.xml emd-72399.xml | 23.6 KB 23.6 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_72399_fsc.xml | 17.1 KB | Display | FSC data file |
| Images | emd_72399.png | 41.3 KB | ||
| Filedesc metadata | emd-72399.cif.gz | 7.6 KB | ||
| Archive directory | https://data.pdbj.org/pub/emdb/structures/EMD-72399 ftp://data.pdbj.org/pub/emdb/structures/EMD-72399 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9y1nMC ![]() 9n8yC ![]() 9n8zC ![]() 9y1mC C: citing same article ( M: atomic model generated by this map |
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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_72399.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | mGluR8-G protein complex with agonist (L-AP4) and PAM (VU600) composite map | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.16 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Metabotropic Glutamate receptor bound to G proteins alpha i-1, be...
+Supramolecule #1: Metabotropic Glutamate receptor bound to G proteins alpha i-1, be...
+Supramolecule #2: G protein heterotrimer bound to scFv14
+Supramolecule #3: mGluR8 homodimer bound to agonist and PAM
+Macromolecule #1: Metabotropic glutamate receptor 8
+Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
+Macromolecule #3: scFv-14
+Macromolecule #4: Guanine nucleotide-binding protein G(i) subunit alpha-1
+Macromolecule #5: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
+Macromolecule #6: (2S)-2-amino-4-phosphonobutanoic acid
+Macromolecule #7: (3P,8S)-3-(2,3-difluoro-4-methoxyphenyl)-2,5-dimethyl-7-(trifluor...
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 4.5 mg/mL |
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| Buffer | pH: 7.5 |
| Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | TFS GLACIOS |
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| Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 48.0 e/Å2 |
| Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.7000000000000001 µm |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
United States, 3 items
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Processing
FIELD EMISSION GUN
