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- EMDB-36175: Cryo-EM structure of G protein-free mGlu2-mGlu4 heterodimer in Ac... -

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Entry
Database: EMDB / ID: EMD-36175
TitleCryo-EM structure of G protein-free mGlu2-mGlu4 heterodimer in Acc state
Map data
Sample
  • Complex: mGlu2-mGlu4 heterodimer in presence of glutamate, JNJ-40411813, and ADX88178
    • Protein or peptide: Metabotropic glutamate receptor 2,Peptidyl-prolyl cis-trans isomerase FKBP1A
    • Protein or peptide: Metabotropic glutamate receptor 4,Serine/threonine-protein kinase mTOR
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: GLUTAMIC ACID
KeywordsComplex structure / mGlu2-mGlu4 heterodimer / MEMBRANE PROTEIN
Function / homology
Function and homology information


regulation of cellular component organization / 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 / regulation of cellular response to stress / macrolide binding / activin receptor binding / TORC1 complex / regulation of skeletal muscle contraction by regulation of release of sequestered calcium ion ...regulation of cellular component organization / 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 / regulation of cellular response to stress / macrolide binding / activin receptor binding / TORC1 complex / regulation of skeletal muscle contraction by regulation of release of sequestered calcium ion / intracellular glutamate homeostasis / transforming growth factor beta receptor binding / cytoplasmic side of membrane / behavioral response to nicotine / regulation of protein metabolic process / TGFBR1 LBD Mutants in Cancer / type I transforming growth factor beta receptor binding / negative regulation of adenylate cyclase activity / G protein-coupled glutamate receptor signaling pathway / negative regulation of activin receptor signaling pathway / heart trabecula formation / I-SMAD binding / neurotransmitter secretion / Class C/3 (Metabotropic glutamate/pheromone receptors) / glutamate receptor activity / glutamate secretion / long-term synaptic depression / regulation of amyloid precursor protein catabolic process / signaling receptor inhibitor activity / terminal cisterna / ryanodine receptor complex / regulation of glutamate secretion / 'de novo' protein folding / astrocyte projection / ventricular cardiac muscle tissue morphogenesis / FK506 binding / cellular response to stress / regulation of dopamine secretion / TGF-beta receptor signaling activates SMADs / mTORC1-mediated signalling / regulation of ryanodine-sensitive calcium-release channel activity / Calcineurin activates NFAT / regulation of immune response / heart morphogenesis / regulation of synaptic transmission, glutamatergic / regulation of neuron apoptotic process / supramolecular fiber organization / presynaptic modulation of chemical synaptic transmission / sarcoplasmic reticulum membrane / negative regulation of autophagy / T cell activation / sarcoplasmic reticulum / protein maturation / TGF-beta receptor signaling in EMT (epithelial to mesenchymal transition) / response to cocaine / calcium channel regulator activity / peptidylprolyl isomerase / peptidyl-prolyl cis-trans isomerase activity / negative regulation of transforming growth factor beta receptor signaling pathway / G protein-coupled receptor activity / Z disc / SARS-CoV-1 activates/modulates innate immune responses / Sensory perception of sweet, bitter, and umami (glutamate) taste / protein folding / presynapse / regulation of protein localization / presynaptic membrane / protein refolding / cytoplasmic vesicle / scaffold protein binding / G alpha (i) signalling events / chemical synaptic transmission / gene expression / amyloid fibril formation / Potential therapeutics for SARS / transmembrane transporter binding / postsynaptic membrane / positive regulation of canonical NF-kappaB signal transduction / non-specific serine/threonine protein kinase / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / positive regulation of MAPK cascade / axon / protein serine/threonine kinase activity / dendrite / protein-containing complex binding / glutamatergic synapse / ATP binding / membrane / plasma membrane / cytoplasm / cytosol
Similarity search - Function
GPCR, family 3, metabotropic glutamate receptor 4 / GPCR, family 3, metabotropic glutamate receptor 2 / Domain of unknown function DUF3385, target of rapamycin protein / Serine/threonine-protein kinase mTOR domain / Domain of unknown function / FKBP12-rapamycin binding domain / Serine/threonine-protein kinase TOR / FKBP12-rapamycin binding domain superfamily / FKBP12-rapamycin binding domain / Rapamycin binding domain ...GPCR, family 3, metabotropic glutamate receptor 4 / GPCR, family 3, metabotropic glutamate receptor 2 / Domain of unknown function DUF3385, target of rapamycin protein / Serine/threonine-protein kinase mTOR domain / Domain of unknown function / FKBP12-rapamycin binding domain / Serine/threonine-protein kinase TOR / FKBP12-rapamycin binding domain superfamily / FKBP12-rapamycin binding domain / Rapamycin binding domain / Serine/threonine-protein kinase ATR-like, HEAT repeats / GPCR, family 3, metabotropic glutamate receptor / : / G-protein coupled receptors family 3 signature 1. / G-protein coupled receptors family 3 signature 3. / 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 / GPCR, family 3 / : / FATC domain / PIK-related kinase, FAT / FAT domain / G-protein coupled receptors family 3 profile. / GPCR family 3, C-terminal / 7 transmembrane sweet-taste receptor of 3 GCPR / FATC / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / : / Phosphatidylinositol 3- and 4-kinases signature 1. / Phosphatidylinositol 3/4-kinase, conserved site / Phosphatidylinositol 3- and 4-kinases signature 2. / FKBP-type peptidyl-prolyl cis-trans isomerase / FKBP-type peptidyl-prolyl cis-trans isomerase domain / FKBP-type peptidyl-prolyl cis-trans isomerase domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain superfamily / Phosphoinositide 3-kinase, catalytic domain / Phosphatidylinositol 3- and 4-kinase / Phosphatidylinositol 3- and 4-kinases catalytic domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain / Peptidyl-prolyl cis-trans isomerase domain superfamily / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I / Armadillo-like helical / Tetratricopeptide-like helical domain superfamily / Armadillo-type fold / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Serine/threonine-protein kinase mTOR / Peptidyl-prolyl cis-trans isomerase FKBP1A / Metabotropic glutamate receptor 2 / Metabotropic glutamate receptor 4
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsWang X / Wang M / Xu T / Feng Y / Han S / Lin S / Zhao Q / Wu B
Funding support China, 2 items
OrganizationGrant numberCountry
National Science Foundation (NSF, China)31825010 China
National Science Foundation (NSF, China)82121005 China
CitationJournal: 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
DepositionMay 12, 2023-
Header (metadata) releaseJun 21, 2023-
Map releaseJun 21, 2023-
UpdateNov 13, 2024-
Current statusNov 13, 2024Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_36175.png

Downloads & links

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Map

FileDownload / File: emd_36175.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.07 Å/pix.
x 360 pix.
= 385.56 Å		1.07 Å/pix.
x 360 pix.
= 385.56 Å		1.07 Å/pix.
x 360 pix.
= 385.56 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.071 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.5
Minimum - Maximum-3.3337564 - 6.1040764
Average (Standard dev.)-0.00068825565 (±0.07125189)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 385.56 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_36175_half_map_1.map
Projections & Slices
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Half map: #1

Fileemd_36175_half_map_2.map
Projections & Slices
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Histogram (log scale)

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Sample components

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Entire : mGlu2-mGlu4 heterodimer in presence of glutamate, JNJ-40411813, a...

EntireName: mGlu2-mGlu4 heterodimer in presence of glutamate, JNJ-40411813, and ADX88178
Components
  • Complex: mGlu2-mGlu4 heterodimer in presence of glutamate, JNJ-40411813, and ADX88178
    • Protein or peptide: Metabotropic glutamate receptor 2,Peptidyl-prolyl cis-trans isomerase FKBP1A
    • Protein or peptide: Metabotropic glutamate receptor 4,Serine/threonine-protein kinase mTOR
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: GLUTAMIC ACID

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Supramolecule #1: mGlu2-mGlu4 heterodimer in presence of glutamate, JNJ-40411813, a...

SupramoleculeName: mGlu2-mGlu4 heterodimer in presence of glutamate, JNJ-40411813, and ADX88178
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Metabotropic glutamate receptor 2,Peptidyl-prolyl cis-trans isome...

MacromoleculeName: Metabotropic glutamate receptor 2,Peptidyl-prolyl cis-trans isomerase FKBP1A
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: peptidylprolyl isomerase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 109.398914 KDa
Recombinant expressionOrganism: mammal environmental sample (environmental samples)
SequenceString: DYKDDDDGAP EGPAKKVLTL EGDLVLGGLF PVHQKGGPAE DCGPVNEHRG IQRLEAMLFA LDRINRDPHL LPGVRLGAHI LDSCSKDTH ALEQALDFVR ASLSRGADGS RHICPDGSYA THGDAPTAIT GVIGGSYSDV SIQVANLLRL FQIPQISYAS T SAKLSDKS ...String:
DYKDDDDGAP EGPAKKVLTL EGDLVLGGLF PVHQKGGPAE DCGPVNEHRG IQRLEAMLFA LDRINRDPHL LPGVRLGAHI LDSCSKDTH ALEQALDFVR ASLSRGADGS RHICPDGSYA THGDAPTAIT GVIGGSYSDV SIQVANLLRL FQIPQISYAS T SAKLSDKS RYDYFARTVP PDFFQAKAMA EILRFFNWTY VSTVASEGDY GETGIEAFEL EARARNICVA TSEKVGRAMS RA AFEGVVR ALLQKPSARV AVLFTRSEDA RELLAASQRL NASFTWVASD GWGALESVVA GSEGAAEGAI TIELASYPIS DFA SYFQSL DPWNNSRNPW FREFWEQRFR CSFRQRDCAA HSLRAVPFEQ ESKIMFVVNA VYAMAHALHN MHRALCPNTT RLCD AMRPV NGRRLYKDFV LNVKFDAPFR PADTHNEVRF DRFGDGIGRY NIFTYLRAGS GRYRYQKVGY WAEGLTLDTS LIPWA SPSA GPLPASRCSE PCLQNEVKSV QPGEVCCWLC IPCQPYEYRL DEFTCADCGL GYWPNASLTG CFELPQEYIR WGDAWA VGP VTIACLGALA TLFVLGVFVR HNATPVVKAS GRELCYILLG GVFLCYCMTF IFIAKPSTAV CTLRRLGLGT AFSVCYS AL LTKTNRIARI FGGAREGAQR PRFISPASQV AICLALISGQ LLIVVAWLVV EAPGTGKETA PERREVVTLR CNHRDASM L GSLAYNVLLI ALCTLYAFKT RKCPENFNEA KFIGFTMYTT CIIWLAFLPI FYVTSSDYRV QTTTMCVSVS LSGSVVLGC LFAPKLHIIL FQPQKNVVSH RAPTSRFGSA AARASSSLGQ GSGSQFVPTV CNGREVVDST TSSLLEVLFQ GPGVQVETIS PGDGRTFPK RGQTCVVHYT GMLEDGKKFD SSRDRNKPFK FMLGKQEVIR GWEEGVAQMS VGQRAKLTIS PDYAYGATGH P GIIPPHAT LVFDVELLKL EFAAAHHHHH HHHHH

UniProtKB: Metabotropic glutamate receptor 2, Peptidyl-prolyl cis-trans isomerase FKBP1A

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Macromolecule #2: Metabotropic glutamate receptor 4,Serine/threonine-protein kinase mTOR

MacromoleculeName: Metabotropic glutamate receptor 4,Serine/threonine-protein kinase mTOR
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: non-specific serine/threonine protein kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 114.187086 KDa
Recombinant expressionOrganism: mammal environmental sample (environmental samples)
SequenceString: DYKDDDDGAP WSHPQFEKGS GSWSHPQFEK KPKGHPHMNS IRIDGDITLG GLFPVHGRGS EGKPCGELKK EKGIHRLEAM LFALDRINN DPDLLPNITL GARILDTCSR DTHALEQSLT FVQALIEKDG TEVRCGSGGP PIITKPERVV GVIGASGSSV S IMVANILR ...String:
DYKDDDDGAP WSHPQFEKGS GSWSHPQFEK KPKGHPHMNS IRIDGDITLG GLFPVHGRGS EGKPCGELKK EKGIHRLEAM LFALDRINN DPDLLPNITL GARILDTCSR DTHALEQSLT FVQALIEKDG TEVRCGSGGP PIITKPERVV GVIGASGSSV S IMVANILR LFKIPQISYA STAPDLSDNS RYDFFSRVVP SDTYQAQAMV DIVRALKWNY VSTVASEGSY GESGVEAFIQ KS REDGGVC IAQSVKIPRE PKAGEFDKII RRLLETSNAR AVIIFANEDD IRRVLEAARR ANQTGHFFWM GSDSWGSKIA PVL HLEEVA EGAVTILPKR MSVRGFDRYF SSRTLDNNRR NIWFAEFWED NFHCKLSRHA LKKGSHVKKC TNRERIGQDS AYEQ EGKVQ FVIDAVYAMG HALHAMHRDL CPGRVGLCPR MDPVDGTQLL KYIRNVNFSG IAGNPVTFNE NGDAPGRYDI YQYQL RNDS AEYKVIGSWT DHLHLRIERM HWPGSGQQLP RSICSLPCQP GERKKTVKGM PCCWHCEPCT GYQYQVDRYT CKTCPY DMR PTENRTGCRP IPIIKLEWGS PWAVLPLFLA VVGIAATLFV VITFVRYNDT PIVKASGREL SYVLLAGIFL CYATTFL MI AEPDLGTCSL RRIFLGLGMS ISYAALLTKT NRIYRIFEQG KRSVSAPRFI SPASQLAITF SLISLQLLGI CVWFVVDP S HSVVDFQDQR TLDPRFARGV LKCDISDLSL ICLLGYSMLL MVTCTVYAIK TRGVPETFNE AKPIGFTMYT TCIVWLAFI PIFFGTSQSA DKLYIQTTTL TVSVSLSASV SLGMLYMPKV YIILFHPEQN VPKRKRSLKA VVTAATMSNK FTQKGNFRPN GEAKSELCE NLEAPALATK QTYVTYTNHA ILEVLFQGPA ILWHEMWHEG LEEASRLYFG ERNVKGMFEV LEPLHAMMER G PQTLKETS FNQAYGRDLM EAQEWCRKYM KSGNVKDLTQ AWDLYYHVFR RISKQ

UniProtKB: Metabotropic glutamate receptor 4, Serine/threonine-protein kinase mTOR

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Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 3 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

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

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Macromolecule #4: GLUTAMIC ACID

MacromoleculeName: GLUTAMIC ACID / type: ligand / ID: 4 / Number of copies: 2 / Formula: GLU
Molecular weightTheoretical: 147.129 Da
Chemical component information

ChemComp-GLU:
GLUTAMIC ACID

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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

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination 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

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 653804
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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