+ Open data
Open data
- Basic information
Basic information
| Entry |  | |||||||||
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| Title | Cryo-EM structure of Gi1-bound mGlu2-mGlu4 heterodimer | |||||||||
|  Map data | ||||||||||
|  Sample | 
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|  Keywords | Complex structure / Gi1-bound mGlu2-mGlu4 heterodimer / membrane protein | |||||||||
| Function / homology |  Function and homology information adenylate cyclase-inhibiting G protein-coupled glutamate receptor signaling pathway / regulation of response to drug / group II metabotropic glutamate receptor activity / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / intracellular glutamate homeostasis / behavioral response to nicotine / negative regulation of adenylate cyclase activity / G protein-coupled glutamate receptor signaling pathway / neurotransmitter secretion / Class C/3 (Metabotropic glutamate/pheromone receptors) ...adenylate cyclase-inhibiting G protein-coupled glutamate receptor signaling pathway / regulation of response to drug / group II metabotropic glutamate receptor activity / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / intracellular glutamate homeostasis / behavioral response to nicotine / negative regulation of adenylate cyclase activity / G protein-coupled glutamate receptor signaling pathway / neurotransmitter secretion / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / glutamate secretion / long-term synaptic depression / regulation of glutamate secretion / astrocyte projection / cellular response to stress / regulation of dopamine secretion / regulation of synaptic transmission, glutamatergic / adenylate cyclase inhibitor activity / positive regulation of protein localization to cell cortex / Adenylate cyclase inhibitory pathway / T cell migration / regulation of neuron apoptotic process / 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 / presynaptic modulation of chemical synaptic transmission / cellular response to forskolin / regulation of mitotic spindle organization / response to cocaine / calcium channel regulator activity / Regulation of insulin secretion / positive regulation of cholesterol biosynthetic process / negative regulation of insulin secretion / G protein-coupled receptor binding / G protein-coupled receptor activity / response to peptide hormone / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / centriolar satellite / 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 / 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 / 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 / presynapse / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / G protein activity / presynaptic membrane / GTPase binding / Ca2+ pathway / cytoplasmic vesicle / fibroblast proliferation / scaffold protein binding / midbody / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / cell cortex / 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 / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement Similarity search - Function | |||||||||
| Biological species |  Homo sapiens (human) /   Escherichia coli (E. coli) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||
|  Authors | Wang X / Wang M / Xu T / Feng Y / Han S / Zhao Q / Wu B | |||||||||
| Funding support |  China, 2 items 
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|  Citation |  Journal: Cell Res / Year: 2023 Title: Structural insights into dimerization and activation of the mGlu2-mGlu3 and mGlu2-mGlu4 heterodimers. Authors: Xinwei Wang / Mu Wang / Tuo Xu / Ye Feng / Qiang Shao / Shuo Han / Xiaojing Chu / Yechun Xu / Shuling Lin / Qiang Zhao / Beili Wu /  Abstract: Heterodimerization of the metabotropic glutamate receptors (mGlus) has shown importance in the functional modulation of the receptors and offers potential drug targets for treating central nervous ...Heterodimerization of the metabotropic glutamate receptors (mGlus) has shown importance in the functional modulation of the receptors and offers potential drug targets for treating central nervous system diseases. However, due to a lack of molecular details of the mGlu heterodimers, understanding of the mechanisms underlying mGlu heterodimerization and activation is limited. Here we report twelve cryo-electron microscopy (cryo-EM) structures of the mGlu2-mGlu3 and mGlu2-mGlu4 heterodimers in different conformational states, including inactive, intermediate inactive, intermediate active and fully active conformations. These structures provide a full picture of conformational rearrangement of mGlu2-mGlu3 upon activation. The Venus flytrap domains undergo a sequential conformational change, while the transmembrane domains exhibit a substantial rearrangement from an inactive, symmetric dimer with diverse dimerization patterns to an active, asymmetric dimer in a conserved dimerization mode. Combined with functional data, these structures reveal that stability of the inactive conformations of the subunits and the subunit-G protein interaction pattern are determinants of asymmetric signal transduction of the heterodimers. Furthermore, a novel binding site for two mGlu4 positive allosteric modulators was observed in the asymmetric dimer interfaces of the mGlu2-mGlu4 heterodimer and mGlu4 homodimer, and may serve as a drug recognition site. These findings greatly extend our knowledge about signal transduction of the mGlus. | |||||||||
| History | 
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- Structure visualization
Structure visualization
| Supplemental images | 
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- Downloads & links
Downloads & links
-EMDB archive
| Map data |  emd_36176.map.gz | 164.2 MB |  EMDB map data format | |
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| Header (meta data) |  emd-36176-v30.xml  emd-36176.xml | 20.5 KB 20.5 KB | Display Display |  EMDB header | 
| Images |  emd_36176.png | 42.8 KB | ||
| Filedesc metadata |  emd-36176.cif.gz | 7.8 KB | ||
| Archive directory |  http://ftp.pdbj.org/pub/emdb/structures/EMD-36176  ftp://ftp.pdbj.org/pub/emdb/structures/EMD-36176 | HTTPS FTP | 
-Validation report
| Summary document |  emd_36176_validation.pdf.gz | 465.1 KB | Display |  EMDB validaton report | 
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| Full document |  emd_36176_full_validation.pdf.gz | 464.6 KB | Display | |
| Data in XML |  emd_36176_validation.xml.gz | 7.2 KB | Display | |
| Data in CIF |  emd_36176_validation.cif.gz | 8.3 KB | Display | |
| Arichive directory |  https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-36176  ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-36176 | HTTPS FTP | 
-Related structure data
| Related structure data |  8jd5MC  8jcuC  8jcvC  8jcwC  8jcxC  8jcyC  8jczC  8jd0C  8jd1C  8jd2C  8jd3C  8jd4C  8jd6C 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 | 
- Links
Links
| EMDB pages |  EMDB (EBI/PDBe) /  EMDataResource | 
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| Related items in Molecule of the Month | 
- Map
Map
| File |  Download / File: emd_36176.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: 1.071 Å | ||||||||||||||||||||||||||||||||||||
| Density | 
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML: 
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-Supplemental data
- Sample components
Sample components
+Entire : Gi1-bound mGlu2-mGlu4 heterodimer
+Supramolecule #1: Gi1-bound mGlu2-mGlu4 heterodimer
+Macromolecule #1: Metabotropic glutamate receptor 2
+Macromolecule #2: Metabotropic glutamate receptor 4
+Macromolecule #3: Guanine nucleotide-binding protein G(i) subunit alpha-1
+Macromolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
+Macromolecule #5: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
+Macromolecule #6: scFv
+Macromolecule #7: 1-butyl-3-chloranyl-4-(4-phenylpiperidin-1-yl)pyridin-2-one
+Macromolecule #8: GLUTAMIC ACID
+Macromolecule #9: CHOLESTEROL
+Macromolecule #10: DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE
+Macromolecule #11: 2-acetamido-2-deoxy-beta-D-glucopyranose
+Macromolecule #12: 5-methyl-N-(4-methylpyrimidin-2-yl)-4-(1H-pyrazol-4-yl)-1,3-thiaz...
-Experimental details
-Structure determination
| Method | cryo EM | 
|---|---|
|  Processing | single particle reconstruction | 
| Aggregation state | particle | 
- Sample preparation
Sample preparation
| Buffer | pH: 7.5 | 
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| Vitrification | Cryogen name: ETHANE | 
- Electron microscopy
Electron microscopy
| Microscope | FEI TITAN KRIOS | 
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| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 70.0 e/Å2 | 
| Electron beam | Acceleration voltage: 300 kV / Electron source:  FIELD EMISSION GUN | 
| Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.8 µm | 
| Experimental equipment |  Model: Titan Krios / Image courtesy: FEI Company | 
- Image processing
Image processing
| Startup model | Type of model: INSILICO MODEL | 
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| Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 939819 | 
| Initial angle assignment | Type: MAXIMUM LIKELIHOOD | 
| Final angle assignment | Type: MAXIMUM LIKELIHOOD | 
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