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- PDB-7mts: CryoEM Structure of mGlu2 - Gi Complex -

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Basic information

Entry
Database: PDB / ID: 7mts
TitleCryoEM Structure of mGlu2 - Gi Complex
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Metabotropic glutamate receptor 2
KeywordsMEMBRANE PROTEIN/SIGNALING PROTEIN / Metabotropic Glutamate Receptor 2 (mGlu2) (mGluR2) / Family C G protein-coupled receptor (GPCR) / Heterotrimeric G protein / CryoEM structure / MEMBRANE PROTEIN / MEMBRANE PROTEIN-SIGNALING PROTEIN complex
Function / homology
Function and homology information


regulation of response to drug / group II metabotropic glutamate receptor activity / behavioral response to nicotine / intracellular glutamate homeostasis / astrocyte projection / negative regulation of adenylate cyclase activity / G protein-coupled glutamate receptor signaling pathway / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate secretion / glutamate receptor activity ...regulation of response to drug / group II metabotropic glutamate receptor activity / behavioral response to nicotine / intracellular glutamate homeostasis / astrocyte projection / negative regulation of adenylate cyclase activity / G protein-coupled glutamate receptor signaling pathway / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate secretion / glutamate receptor activity / regulation of glutamate secretion / long-term synaptic depression / regulation of dopamine secretion / calcium channel regulator activity / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / D2 dopamine receptor binding / G protein-coupled serotonin receptor binding / cellular response to forskolin / regulation of mitotic spindle organization / regulation of synaptic transmission, glutamatergic / presynaptic modulation of chemical synaptic transmission / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / response to cocaine / Regulation of insulin secretion / G protein-coupled receptor activity / G protein-coupled receptor binding / G-protein beta/gamma-subunit complex binding / Olfactory Signaling Pathway / Activation of the phototransduction cascade / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G-protein activation / G protein-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / response to peptide hormone / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / G-protein beta-subunit binding / GDP binding / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye / GTPase binding / presynaptic membrane / phospholipase C-activating G protein-coupled receptor signaling pathway / Ca2+ pathway / cell cortex / gene expression / midbody / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / scaffold protein binding / G alpha (q) signalling events / chemical synaptic transmission / cell population proliferation / Ras protein signal transduction / Extra-nuclear estrogen signaling / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / G protein-coupled receptor signaling pathway / cell cycle / lysosomal membrane / axon / cell division / GTPase activity / centrosome / glutamatergic synapse / synapse / dendrite / protein-containing complex binding / nucleolus
Similarity search - Function
GPCR, family 3, metabotropic glutamate receptor 2 / 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, metabotropic glutamate receptor 2 / 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. / G-protein alpha subunit, group I / Receptor, ligand binding region / Receptor family ligand binding region / G-alpha domain profile. / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G protein alpha subunit / Periplasmic binding protein-like I / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily / G-protein gamma-like domain / GGL domain / G protein gamma subunit-like motifs / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
GLUTAMIC ACID / Chem-ZQY / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(i) subunit alpha-1 / Metabotropic glutamate receptor 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsSeven, A.B. / Barros-Alvarez, X. / Skiniotis, G.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01 NS092695 United States
CitationJournal: Nature / Year: 2021
Title: G-protein activation by a metabotropic glutamate receptor.
Authors: Alpay B Seven / Ximena Barros-Álvarez / Marine de Lapeyrière / Makaía M Papasergi-Scott / Michael J Robertson / Chensong Zhang / Robert M Nwokonko / Yang Gao / Justin G Meyerowitz / Jean- ...Authors: Alpay B Seven / Ximena Barros-Álvarez / Marine de Lapeyrière / Makaía M Papasergi-Scott / Michael J Robertson / Chensong Zhang / Robert M Nwokonko / Yang Gao / Justin G Meyerowitz / Jean-Philippe Rocher / Dominik Schelshorn / Brian K Kobilka / Jesper M Mathiesen / Georgios Skiniotis /
Abstract: Family C G-protein-coupled receptors (GPCRs) operate as obligate dimers with extracellular domains that recognize small ligands, leading to G-protein activation on the transmembrane (TM) domains of ...Family C G-protein-coupled receptors (GPCRs) operate as obligate dimers with extracellular domains that recognize small ligands, leading to G-protein activation on the transmembrane (TM) domains of these receptors by an unknown mechanism. Here we show structures of homodimers of the family C metabotropic glutamate receptor 2 (mGlu2) in distinct functional states and in complex with heterotrimeric G. Upon activation of the extracellular domain, the two transmembrane domains undergo extensive rearrangement in relative orientation to establish an asymmetric TM6-TM6 interface that promotes conformational changes in the cytoplasmic domain of one protomer. Nucleotide-bound G can be observed pre-coupled to inactive mGlu2, but its transition to the nucleotide-free form seems to depend on establishing the active-state TM6-TM6 interface. In contrast to family A and B GPCRs, G-protein coupling does not involve the cytoplasmic opening of TM6 but is facilitated through the coordination of intracellular loops 2 and 3, as well as a critical contribution from the C terminus of the receptor. The findings highlight the synergy of global and local conformational transitions to facilitate a new mode of G-protein activation.
History
DepositionMay 13, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 7, 2021Provider: repository / Type: Initial release
Revision 1.1Jul 14, 2021Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Jul 28, 2021Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last

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Structure visualization

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  • Deposited structure unit
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  • Superimposition on EM map
  • EMDB-23996
  • Imaged by UCSF Chimera
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Assembly

Deposited unit
A: Metabotropic glutamate receptor 2
B: Metabotropic glutamate receptor 2
C: Guanine nucleotide-binding protein G(i) subunit alpha-1
D: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
E: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)274,64610
Polymers273,4845
Non-polymers1,1625
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Guanine nucleotide-binding protein ... , 3 types, 3 molecules CDE

#2: Protein Guanine nucleotide-binding protein G(i) subunit alpha-1 / Adenylate cyclase-inhibiting G alpha protein


Mass: 40415.031 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAI1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P63096
#3: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 37342.785 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P62873
#4: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / G gamma-I


Mass: 7861.143 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNG2 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P59768

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Protein / Sugars , 2 types, 4 molecules AB

#1: Protein Metabotropic glutamate receptor 2 / / mGluR2


Mass: 93932.445 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GRM2, GPRC1B, MGLUR2 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q14416
#7: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2
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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Non-polymers , 2 types, 3 molecules

#5: Chemical ChemComp-ZQY / 2-methoxy-6-propyl-N-(2-{4-[(1H-tetrazol-5-yl)methoxy]phenyl}ethyl)thieno[2,3-d]pyrimidin-4-amine


Mass: 425.507 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C20H23N7O2S / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical ChemComp-GLU / GLUTAMIC ACID / Glutamic acid


Type: L-peptide linking / Mass: 147.129 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C5H9NO4

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Details

Has ligand of interestY

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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: mGlu2 - Heterotrimeric Gi complex / Type: COMPLEX
Details: Heterotrimeric G protein coupled metabotropic glutamate receptor 2 bound to Ago-PAM ADX55164 and L-Glutamate
Entity ID: #1-#4 / Source: RECOMBINANT
Molecular weightValue: 0.277 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE

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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 defocus max: 2000 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Image recordingElectron dose: 1.3 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

Software
NameVersionClassificationNB
PHENIXdev_4271:refinement
UCSF ChimeraX1.1/v9model building
EM software
IDNameVersionCategory
2SerialEMimage acquisition
12cryoSPARC3.23D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 799323 / Details: A composite map of four locally refined maps. / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00616406
ELECTRON MICROSCOPYf_angle_d0.69422356
ELECTRON MICROSCOPYf_dihedral_angle_d4.4022325
ELECTRON MICROSCOPYf_chiral_restr0.0482566
ELECTRON MICROSCOPYf_plane_restr0.0072873

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