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- PDB-6n52: Metabotropic Glutamate Receptor 5 Apo Form -

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Basic information

Entry
Database: PDB / ID: 6n52
TitleMetabotropic Glutamate Receptor 5 Apo Form
ComponentsMetabotropic glutamate receptor 5
KeywordsMEMBRANE PROTEIN / Cell Surface Receptor
Function / homology
Function and homology information


A2A adenosine receptor binding / regulation of translational elongation / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway / G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential / trans-synaptic signaling by endocannabinoid, modulating synaptic transmission / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / positive regulation of long-term neuronal synaptic plasticity / : / desensitization of G protein-coupled receptor signaling pathway / G protein-coupled glutamate receptor signaling pathway ...A2A adenosine receptor binding / regulation of translational elongation / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway / G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential / trans-synaptic signaling by endocannabinoid, modulating synaptic transmission / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / positive regulation of long-term neuronal synaptic plasticity / : / desensitization of G protein-coupled receptor signaling pathway / G protein-coupled glutamate receptor signaling pathway / neurotransmitter receptor activity involved in regulation of postsynaptic cytosolic calcium ion concentration / astrocyte projection / Class C/3 (Metabotropic glutamate/pheromone receptors) / protein kinase C-activating G protein-coupled receptor signaling pathway / glutamate receptor activity / Neurexins and neuroligins / protein tyrosine kinase activator activity / calcium-mediated signaling using intracellular calcium source / positive regulation of protein tyrosine kinase activity / regulation of synaptic transmission, glutamatergic / protein tyrosine kinase binding / dendritic shaft / locomotory behavior / learning / G protein-coupled receptor activity / postsynaptic density membrane / synapse organization / regulation of protein phosphorylation / Schaffer collateral - CA1 synapse / cognition / cellular response to amyloid-beta / regulation of translation / chemical synaptic transmission / G alpha (q) signalling events / dendritic spine / positive regulation of MAPK cascade / learning or memory / glutamatergic synapse / regulation of DNA-templated transcription / identical protein binding / plasma membrane / cytoplasm
Similarity search - Function
GPCR, family 3, metabotropic glutamate receptor 5 / 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 2. / GPCR, family 3, nine cysteines domain / GPCR, family 3, nine cysteines domain superfamily / Nine Cysteines Domain of family 3 GPCR ...GPCR, family 3, metabotropic glutamate receptor 5 / 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 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 / G-protein coupled receptors family 3 signature 3. / GPCR, family 3 / GPCR family 3, C-terminal / 7 transmembrane sweet-taste receptor of 3 GCPR / G-protein coupled receptors family 3 profile. / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I
Similarity search - Domain/homology
Metabotropic glutamate receptor 5
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4 Å
AuthorsKoehl, A. / Hu, H. / Feng, D. / Sun, B. / Weis, W.I. / Skiniotis, G.S. / Mathiesen, J.M. / Kobilka, B.K.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS092695 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS028471 United States
CitationJournal: Nature / Year: 2019
Title: Structural insights into the activation of metabotropic glutamate receptors.
Authors: Antoine Koehl / Hongli Hu / Dan Feng / Bingfa Sun / Yan Zhang / Michael J Robertson / Matthew Chu / Tong Sun Kobilka / Toon Laeremans / Jan Steyaert / Jeffrey Tarrasch / Somnath Dutta / ...Authors: Antoine Koehl / Hongli Hu / Dan Feng / Bingfa Sun / Yan Zhang / Michael J Robertson / Matthew Chu / Tong Sun Kobilka / Toon Laeremans / Jan Steyaert / Jeffrey Tarrasch / Somnath Dutta / Rasmus Fonseca / William I Weis / Jesper M Mathiesen / Georgios Skiniotis / Brian K Kobilka /
Abstract: Metabotropic glutamate receptors are family C G-protein-coupled receptors. They form obligate dimers and possess extracellular ligand-binding Venus flytrap domains, which are linked by cysteine-rich ...Metabotropic glutamate receptors are family C G-protein-coupled receptors. They form obligate dimers and possess extracellular ligand-binding Venus flytrap domains, which are linked by cysteine-rich domains to their 7-transmembrane domains. Spectroscopic studies show that signalling is a dynamic process, in which large-scale conformational changes underlie the transmission of signals from the extracellular Venus flytraps to the G protein-coupling domains-the 7-transmembrane domains-in the membrane. Here, using a combination of X-ray crystallography, cryo-electron microscopy and signalling studies, we present a structural framework for the activation mechanism of metabotropic glutamate receptor subtype 5. Our results show that agonist binding at the Venus flytraps leads to a compaction of the intersubunit dimer interface, thereby bringing the cysteine-rich domains into close proximity. Interactions between the cysteine-rich domains and the second extracellular loops of the receptor enable the rigid-body repositioning of the 7-transmembrane domains, which come into contact with each other to initiate signalling.
History
DepositionNov 20, 2018Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 23, 2019Provider: repository / Type: Initial release
Revision 1.1Feb 6, 2019Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.name
Revision 1.2Feb 20, 2019Group: Data collection / Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Dec 18, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.4Jul 29, 2020Group: Data collection / Derived calculations / Structure summary
Category: chem_comp / entity ...chem_comp / entity / pdbx_chem_comp_identifier / pdbx_entity_nonpoly / struct_conn / struct_site / struct_site_gen
Item: _chem_comp.name / _chem_comp.type ..._chem_comp.name / _chem_comp.type / _entity.pdbx_description / _pdbx_entity_nonpoly.name / _struct_conn.pdbx_role
Description: Carbohydrate remediation / Provider: repository / Type: Remediation

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Structure visualization

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Assembly

Deposited unit
A: Metabotropic glutamate receptor 5
B: Metabotropic glutamate receptor 5
hetero molecules


Theoretical massNumber of molelcules
Total (without water)196,2416
Polymers195,3562
Non-polymers8854
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration, Single peak that confirmed presence of mGlu5 by SDS PAGE
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area2140 Å2
ΔGint-2 kcal/mol
Surface area75220 Å2

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Components

#1: Protein Metabotropic glutamate receptor 5 / / mGluR5


Mass: 97677.945 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GRM5, GPRC1E, MGLUR5 / Plasmid: PVL1392 / Cell line (production host): SF9 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P41594
#2: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Metabotropic Glutamate Receptor 5 in Nanodiscs / Type: COMPLEX / Details: Metabotropic Glutamate Receptor 5 in Nanodiscs / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.2 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm) / Strain: Sf9
Buffer solutionpH: 7.5
Details: 100mM NaCl, 20 mM HEPES pH 7.5, 5uM FFMTEB added as a negative allosteric modulator.
Buffer component
IDConc.NameFormulaBuffer-ID
1100 mMsodium chlorideNaClSodium chloride1
220 mMHEPESHEPES1
SpecimenConc.: 7 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: This sample was mono disperse as assayed by gel filtration.
Specimen supportGrid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 293 K
Details: Addition 0.0005% Amphipol A8-35was added to sample prior to apply to grid; 3.5ul sample was applied; blot for 1s before plunging

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 130000 X / Calibrated magnification: 47169 X / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Image recordingElectron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM software
IDNameVersionCategory
2SerialEMimage acquisition
11RELION2.1final Euler assignment
12RELION2.1classification
13RELION3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 123096 / Symmetry type: POINT

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