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- EMDB-37976: Human FL Metabotropic glutamate receptor 5, mGlu5-5M with agonist... -

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Basic information

Entry
Database: EMDB / ID: EMD-37976
TitleHuman FL Metabotropic glutamate receptor 5, mGlu5-5M with agonist and PAM, W785A mutant
Map dataCombined sharpened map with B-factor of -62
Sample
  • Complex: Thermostabilised full length human mGluR5, W785A mutant
    • Protein or peptide: Metabotropic glutamate receptor 5
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: (S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)-PROPIONIC ACID
KeywordsG-PROTEIN COUPLED RECEPTORS / SIGNAL TRANSDUCTION / METABOTROPIC GLUTAMATE RECEPTOR / Agonist / active state / MEMBRANE PROTEIN
Function / homology
Function and homology information


A2A adenosine receptor binding / neurotransmitter receptor activity involved in regulation of postsynaptic cytosolic calcium ion concentration / G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway / positive regulation of long-term neuronal synaptic plasticity / desensitization of G protein-coupled receptor signaling pathway / G protein-coupled glutamate receptor signaling pathway / astrocyte projection / Class C/3 (Metabotropic glutamate/pheromone receptors) ...A2A adenosine receptor binding / neurotransmitter receptor activity involved in regulation of postsynaptic cytosolic calcium ion concentration / G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential / adenylate cyclase inhibiting G protein-coupled glutamate receptor activity / phospholipase C-activating G protein-coupled glutamate receptor signaling pathway / positive regulation of long-term neuronal synaptic plasticity / desensitization of G protein-coupled receptor signaling pathway / G protein-coupled glutamate receptor signaling pathway / astrocyte projection / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / Neurexins and neuroligins / protein tyrosine kinase activator activity / regulation of synaptic transmission, glutamatergic / positive regulation of calcium-mediated signaling / dendritic shaft / protein tyrosine kinase binding / learning / locomotory behavior / synapse organization / postsynaptic density membrane / G protein-coupled receptor activity / Schaffer collateral - CA1 synapse / cognition / cellular response to amyloid-beta / chemical synaptic transmission / G alpha (q) signalling events / dendritic spine / learning or memory / positive regulation of MAPK cascade / neuronal cell body / dendrite / regulation of DNA-templated transcription / glutamatergic synapse / 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 ...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 / G-protein coupled receptors family 3 signature 3. / 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
Similarity search - Domain/homology
Metabotropic glutamate receptor 5
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsVinothkumar KR / Lebon G / Cannone G
Funding support India, France, 3 items
OrganizationGrant numberCountry
Department of Biotechnology (DBT, India)DBT/PR12422/MED/31/287/204 India
Other governmentRTI4006 India
Agence Nationale de la Recherche (ANR)ANR-20-CE11-0019 France
CitationJournal: Nat Commun / Year: 2025
Title: Conformational diversity in class C GPCR positive allosteric modulation.
Authors: Giuseppe Cannone / Ludovic Berto / Fanny Malhaire / Gavin Ferguson / Aurelien Fouillen / Stéphanie Balor / Joan Font-Ingles / Amadeu Llebaria / Cyril Goudet / Abhay Kotecha / Vinothkumar K ...Authors: Giuseppe Cannone / Ludovic Berto / Fanny Malhaire / Gavin Ferguson / Aurelien Fouillen / Stéphanie Balor / Joan Font-Ingles / Amadeu Llebaria / Cyril Goudet / Abhay Kotecha / Vinothkumar K R / Guillaume Lebon /
Abstract: The metabotropic glutamate receptors (mGlus) are class C G protein-coupled receptors (GPCR) that form obligate dimers activated by the major excitatory neurotransmitter L-glutamate. The architecture ...The metabotropic glutamate receptors (mGlus) are class C G protein-coupled receptors (GPCR) that form obligate dimers activated by the major excitatory neurotransmitter L-glutamate. The architecture of mGlu receptor comprises an extracellular Venus-Fly Trap domain (VFT) connected to the transmembrane domain (7TM) through a Cysteine-Rich Domain (CRD). The binding of L-glutamate in the VFTs and subsequent conformational change results in the signal being transmitted to the 7TM inducing G protein binding and activation. The mGlu receptors signal transduction can be allosterically potentiated by positive allosteric modulators (PAMs) binding to the 7TMs, which are of therapeutic interest in various neurological disorders. Here, we report the cryoEM structures of metabotropic glutamate receptor 5 (mGlu) purified with three chemically and pharmacologically distinct PAMs. We find that the PAMs modulate the receptor equilibrium through their different binding modes, revealing how their interactions in the 7TMs impact the mGlu receptor conformational landscape and function. In addition, we identified a PAM-free but agonist-bound intermediate state that also reveals interactions mediated by intracellular loop 2. The activation of mGlu receptor is a multi-step process in which the binding of the PAMs in the 7TM modulates the equilibrium towards the active state.
History
DepositionNov 4, 2023-
Header (metadata) releaseNov 6, 2024-
Map releaseNov 6, 2024-
UpdateJan 29, 2025-
Current statusJan 29, 2025Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_37976.png

Downloads & links

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Map

FileDownload / File: emd_37976.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCombined sharpened map with B-factor of -62
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.07 Å/pix.
x 384 pix.
= 410.88 Å		1.07 Å/pix.
x 384 pix.
= 410.88 Å		1.07 Å/pix.
x 384 pix.
= 410.88 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.07 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.616
Minimum - Maximum-1.6816247 - 3.9876313
Average (Standard dev.)0.0025450662 (±0.07531487)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 410.88 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: One of the half map from Cryosparc

Fileemd_37976_half_map_1.map
AnnotationOne of the half map from Cryosparc
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: One of the half map from Cryosparc

Fileemd_37976_half_map_2.map
AnnotationOne of the half map from Cryosparc
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Thermostabilised full length human mGluR5, W785A mutant

EntireName: Thermostabilised full length human mGluR5, W785A mutant
Components
  • Complex: Thermostabilised full length human mGluR5, W785A mutant
    • Protein or peptide: Metabotropic glutamate receptor 5
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: (S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)-PROPIONIC ACID

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Supramolecule #1: Thermostabilised full length human mGluR5, W785A mutant

SupramoleculeName: Thermostabilised full length human mGluR5, W785A mutant
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Details: Receptor was purified with orthosteric Quisqualate and PAM VU0424465
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 200 KDa

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Macromolecule #1: Metabotropic glutamate receptor 5

MacromoleculeName: Metabotropic glutamate receptor 5 / type: protein_or_peptide / ID: 1
Details: The N-terminal sequence (DYKDDDDKHHHHHHHHHHLEVLFQGP) is the tag and linker), which has been cleaved by protease before structural experiment. Here, it is included for completion. The ...Details: The N-terminal sequence (DYKDDDDKHHHHHHHHHHLEVLFQGP) is the tag and linker), which has been cleaved by protease before structural experiment. Here, it is included for completion. The sequence when compared to uniprot starts at 21 and ends at 856 (construct used for expression). The construct has the following mutations (with reference to Uniprot ID P41594) H350L - mutation for nanobody binding T742A, S753A, T777A, I799A, A813L (thermostabilising mutant) W785A - introduced mutant to test for PAM binding. There are 10 disulfide bonds per chain and 2 NAG molecules.
Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 93.619383 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QSSERRVVAH MPGDIIIGAL FSVHHQPTVD KVHERKCGAV REQYGIQRVE AMLHTLERIN SDPTLLPNIT LGCEIRDSCW HSAVALEQS IEFIRDSLIS SEEEEGLVRC VDGSSSSFRS KKPIVGVIGP GSSSVAIQVQ NLLQLFNIPQ IAYSATSMDL S DKTLFKYF ...String:
QSSERRVVAH MPGDIIIGAL FSVHHQPTVD KVHERKCGAV REQYGIQRVE AMLHTLERIN SDPTLLPNIT LGCEIRDSCW HSAVALEQS IEFIRDSLIS SEEEEGLVRC VDGSSSSFRS KKPIVGVIGP GSSSVAIQVQ NLLQLFNIPQ IAYSATSMDL S DKTLFKYF MRVVPSDAQQ ARAMVDIVKR YNWTYVSAVH TEGNYGESGM EAFKDMSAKE GICIAHSYKI YSNAGEQSFD KL LKKLTSH LPKARVVACF CEGMTVRGLL MAMRRLGLAG EFLLLGSDGW ADRYDVTDGY QREAVGGITI KLQSPDVKWF DDY YLKLRP ETNLRNPWFQ EFWQHRFQCR LEGFPQENSK YNKTCNSSLT LKTHHVQDSK MGFVINAIYS MAYGLHNMQM SLCP GYAGL CDAMKPIDGR KLLESLMKTN FTGVSGDTIL FDENGDSPGR YEIMNFKEMG KDYFDYINVG SWDNGELKMD DDEVW SKKS NIIRSVCSEP CEKGQIKVIR KGEVSCCWTC TPCKENEYVF DEYTCKACQL GSWPTDDLTG CDLIPVQYLR WGDPEP IAA VVFACLGLLA TLFVTVVFII YRDTPVVKSS SRELCYIILA GICLGYLCTF CLIAKPKQIY CYLQRIGIGL SPAMSYS AL VTKTNRIARI LAGSKKKICT KKPRFMSACA QLVIAFILIC IQLGIIVALF IMEPPDIMHD YPSIREVYLI CNTTNLGV V APLGYNGLLI LACTFYAFKT RNVPANFNEA KYIAFAMYTT CIIALAFVPI YFGSNYKAIT MCFSVSLSAT VLLGCMFVP KVYIILAKPE RNVRSAFTTS TVVRMHVGDG KSSSAA

UniProtKB: Metabotropic glutamate receptor 5

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

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

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

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Macromolecule #3: (S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)-PROPIONIC ACID

MacromoleculeName: (S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)-PROPIONIC ACID
type: ligand / ID: 3 / Number of copies: 2 / Formula: QUS
Molecular weightTheoretical: 189.126 Da
Chemical component information

ChemComp-QUS:
(S)-2-AMINO-3-(3,5-DIOXO-[1,2,4]OXADIAZOLIDIN-2-YL)-PROPIONIC ACID / agonist*YM

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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

Concentration6 mg/mL
BufferpH: 7.4
Component:
ConcentrationNameFormula
25.0 mMHEPES
150.0 mMSodium ChlorideNaCl
0.03 %dodecyl maltoside
0.006 %cholesterol hemisuccinate
GridModel: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 289 K / Instrument: FEI VITROBOT MARK IV / Details: Blot force was set to 0.
DetailsReceptor is purified in detergent micelles and monodisperse. The receptor is purified with 10 uM Quisqualate and 10 uM PAM VU0424465

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Number grids imaged: 2 / Number real images: 5762 / Average exposure time: 60.0 sec. / Average electron dose: 28.25 e/Å2
Details: Images were collected in movie mode for 60 seconds and 25 frames were stored.
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated magnification: 130841 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.8000000000000003 µm / Nominal defocus min: 1.8 µm / Nominal magnification: 75000
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

Particle selectionNumber selected: 783666
Details: The particles were extract from two batches of data collection
Startup modelType of model: OTHER
Details: Previous low resolution map or ab-initio model in CryoSparc was used
Final reconstructionNumber classes used: 3 / Applied symmetry - Point group: C1 (asymmetric) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.3.0) / Number images used: 188960
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.3.0)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

2377


Chain - Chain ID: A / Chain - Source name: Other / Chain - Initial model type: experimental model
Details: The initial model was from this deposition ID, which has been submitted
RefinementSpace: RECIPROCAL / Protocol: OTHER / Overall B value: 183.8
Output model

PDB-8x0e:
Human FL Metabotropic glutamate receptor 5, mGlu5-5M with agonist and PAM, W785A mutant

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