+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-31235 | |||||||||||||||
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Title | Cryo-EM structure of inactive mGlu2 homodimer | |||||||||||||||
Map data | ||||||||||||||||
Sample |
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Keywords | cryo-EM structure / membrane protein / GPCR | |||||||||||||||
Function / homology | Function and homology information regulation of response to drug / group II metabotropic glutamate receptor activity / intracellular glutamate homeostasis / behavioral response to nicotine / astrocyte projection / G protein-coupled glutamate receptor signaling pathway / negative regulation of adenylate cyclase activity / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / glutamate secretion ...regulation of response to drug / group II metabotropic glutamate receptor activity / intracellular glutamate homeostasis / behavioral response to nicotine / astrocyte projection / G protein-coupled glutamate receptor signaling pathway / negative regulation of adenylate cyclase activity / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / glutamate secretion / regulation of glutamate secretion / long-term synaptic depression / regulation of dopamine secretion / calcium channel regulator activity / regulation of synaptic transmission, glutamatergic / presynaptic modulation of chemical synaptic transmission / response to cocaine / G protein-coupled receptor activity / presynaptic membrane / gene expression / G alpha (i) signalling events / scaffold protein binding / chemical synaptic transmission / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / axon / glutamatergic synapse / dendrite / plasma membrane Similarity search - Function | |||||||||||||||
Biological species | Homo sapiens (human) | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||||||||
Authors | Du J / Wang D | |||||||||||||||
Funding support | China, 4 items
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Citation | Journal: Nature / Year: 2021 Title: Structures of human mGlu2 and mGlu7 homo- and heterodimers. Authors: Juan Du / Dejian Wang / Hongcheng Fan / Chanjuan Xu / Linhua Tai / Shuling Lin / Shuo Han / Qiuxiang Tan / Xinwei Wang / Tuo Xu / Hui Zhang / Xiaojing Chu / Cuiying Yi / Peng Liu / Xiaomei ...Authors: Juan Du / Dejian Wang / Hongcheng Fan / Chanjuan Xu / Linhua Tai / Shuling Lin / Shuo Han / Qiuxiang Tan / Xinwei Wang / Tuo Xu / Hui Zhang / Xiaojing Chu / Cuiying Yi / Peng Liu / Xiaomei Wang / Yu Zhou / Jean-Philippe Pin / Philippe Rondard / Hong Liu / Jianfeng Liu / Fei Sun / Beili Wu / Qiang Zhao / Abstract: The metabotropic glutamate receptors (mGlus) are involved in the modulation of synaptic transmission and neuronal excitability in the central nervous system. These receptors probably exist as both ...The metabotropic glutamate receptors (mGlus) are involved in the modulation of synaptic transmission and neuronal excitability in the central nervous system. These receptors probably exist as both homo- and heterodimers that have unique pharmacological and functional properties. Here we report four cryo-electron microscopy structures of the human mGlu subtypes mGlu2 and mGlu7, including inactive mGlu2 and mGlu7 homodimers; mGlu2 homodimer bound to an agonist and a positive allosteric modulator; and inactive mGlu2-mGlu7 heterodimer. We observed a subtype-dependent dimerization mode for these mGlus, as a unique dimer interface that is mediated by helix IV (and that is important for limiting receptor activity) exists only in the inactive mGlu2 structure. The structures provide molecular details of the inter- and intra-subunit conformational changes that are required for receptor activation, which distinguish class C G-protein-coupled receptors from those in classes A and B. Furthermore, our structure and functional studies of the mGlu2-mGlu7 heterodimer suggest that the mGlu7 subunit has a dominant role in controlling dimeric association and G-protein activation in the heterodimer. These insights into mGlu homo- and heterodimers highlight the complex landscape of mGlu dimerization and activation. | |||||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_31235.map.gz | 157.3 MB | EMDB map data format | |
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Header (meta data) | emd-31235-v30.xml emd-31235.xml | 10.9 KB 10.9 KB | Display Display | EMDB header |
Images | emd_31235.png | 89.6 KB | ||
Filedesc metadata | emd-31235.cif.gz | 5.4 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-31235 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-31235 | HTTPS FTP |
-Validation report
Summary document | emd_31235_validation.pdf.gz | 438.4 KB | Display | EMDB validaton report |
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Full document | emd_31235_full_validation.pdf.gz | 437.9 KB | Display | |
Data in XML | emd_31235_validation.xml.gz | 7.2 KB | Display | |
Data in CIF | emd_31235_validation.cif.gz | 8.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-31235 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-31235 | HTTPS FTP |
-Related structure data
Related structure data | 7epaMC 7epbC 7epcC 7epdC 7epeC 7epfC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_31235.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: 0.82 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : Inactive mGlu2 homodimer
Entire | Name: Inactive mGlu2 homodimer |
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Components |
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-Supramolecule #1: Inactive mGlu2 homodimer
Supramolecule | Name: Inactive mGlu2 homodimer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: Homo sapiens (human) |
-Macromolecule #1: Metabotropic glutamate receptor 2
Macromolecule | Name: Metabotropic glutamate receptor 2 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: Homo sapiens (human) |
Molecular weight | Theoretical: 91.111289 KDa |
Recombinant expression | Organism: mammal environmental sample (environmental samples) |
Sequence | String: DYKDDDDEGP AKKVLTLEGD LVLGGLFPVH QKGGPAEDCG PVNEHRGIQR LEAMLFALDR INRDPHLLPG VRLGAHILDS CSKDTHALE QALDFVRASL SRGADGSRHI CPDGSYATHG DAPTAITGVI GGSYSDVSIQ VANLLRLFQI PQISYASTSA K LSDKSRYD ...String: DYKDDDDEGP AKKVLTLEGD LVLGGLFPVH QKGGPAEDCG PVNEHRGIQR LEAMLFALDR INRDPHLLPG VRLGAHILDS CSKDTHALE QALDFVRASL SRGADGSRHI CPDGSYATHG DAPTAITGVI GGSYSDVSIQ VANLLRLFQI PQISYASTSA K LSDKSRYD YFARTVPPDF FQAKAMAEIL RFFNWTYVST VASEGDYGET GIEAFELEAR ARNICVATSE KVGRAMSRAA FE GVVRALL QKPSARVAVL FTRSEDAREL LAASQRLNAS FTWVASDGWG ALESVVAGSE GAAEGAITIE LASYPISDFA SYF QSLDPW NNSRNPWFRE FWEQRFRCSF RQRDCAAHSL RAVPFEQESK IMFVVNAVYA MAHALHNMHR ALCPNTTRLC DAMR PVNGR RLYKDFVLNV KFDAPFRPAD THNEVRFDRF GDGIGRYNIF TYLRAGSGRY RYQKVGYWAE GLTLDTSLIP WASPS AGPL PASRCSEPCL QNEVKSVQPG EVCCWLCIPC QPYEYRLDEF TCADCGLGYW PNASLTGCFE LPQEYIRWGD AWAVGP VTI ACLGALATLF VLGVFVRHNA TPVVKASGRE LCYILLGGVF LCYCMTFIFI AKPSTAVCTL RRLGLGTAFS VCYSALL TK TYRIARIFGG AREGAQRPRF ISPASQVAIC LALISGQLLI VVAWLVVEAP GTGKETAPER REVVTLRCNH RDASMLGS L AYNVLLIALC TLYAFKTRKC PENFNEAKFI GFTMYTTCII WLAFLPIFYV TSSDYRVQTT TMCVSVSLSG SVVLGCLFA PKLYIILFQP QKNVEFLEVL FQ UniProtKB: Metabotropic glutamate receptor 2 |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Average electron dose: 1.75 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-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: 257133 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |