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- PDB-7cx2: Cryo-EM structure of the PGE2-bound EP2-Gs complex -

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Basic information

Entry
Database: PDB / ID: 7cx2
TitleCryo-EM structure of the PGE2-bound EP2-Gs complex
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • Nanobody-35
  • Prostaglandin E2 receptor EP2 subtype
KeywordsMEMBRANE PROTEIN / GPCR / EP2 / Complex / PGE2
Function / homology
Function and homology information


prostaglandin E receptor activity / Prostanoid ligand receptors / response to nematode / PKA activation in glucagon signalling / hair follicle placode formation / developmental growth / D1 dopamine receptor binding / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis ...prostaglandin E receptor activity / Prostanoid ligand receptors / response to nematode / PKA activation in glucagon signalling / hair follicle placode formation / developmental growth / D1 dopamine receptor binding / intracellular transport / vascular endothelial cell response to laminar fluid shear stress / renal water homeostasis / Hedgehog 'off' state / adenylate cyclase-activating adrenergic receptor signaling pathway / activation of adenylate cyclase activity / regulation of insulin secretion / cellular response to glucagon stimulus / adenylate cyclase activator activity / response to progesterone / trans-Golgi network membrane / negative regulation of inflammatory response to antigenic stimulus / bone development / G-protein beta/gamma-subunit complex binding / platelet aggregation / Olfactory Signaling Pathway / cognition / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / adenylate cyclase-activating G protein-coupled receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Glucagon signaling in metabolic regulation / G beta:gamma signalling through BTK / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / adenylate cyclase-activating dopamine receptor signaling pathway / sensory perception of smell / GPER1 signaling / Inactivation, recovery and regulation of the phototransduction cascade / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / sensory perception of taste / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / regulation of cell population proliferation / positive regulation of cold-induced thermogenesis / G protein activity / GTPase binding / positive regulation of cytosolic calcium ion concentration / Ca2+ pathway / retina development in camera-type eye / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / fibroblast proliferation / G alpha (i) signalling events / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / response to lipopolysaccharide / Ras protein signal transduction / Extra-nuclear estrogen signaling / cell population proliferation / G protein-coupled receptor signaling pathway / inflammatory response / lysosomal membrane / GTPase activity / synapse / protein-containing complex binding / GTP binding / signal transduction / extracellular exosome / metal ion binding / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Prostanoid EP2 receptor / Prostanoid receptor / G-protein alpha subunit, group S / YVTN repeat-like/Quinoprotein amine dehydrogenase / 7 Propeller / Methylamine Dehydrogenase; Chain H / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. ...Prostanoid EP2 receptor / Prostanoid receptor / G-protein alpha subunit, group S / YVTN repeat-like/Quinoprotein amine dehydrogenase / 7 Propeller / Methylamine Dehydrogenase; Chain H / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / WD domain, G-beta repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / Immunoglobulins / Immunoglobulin-like / Sandwich / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta
Similarity search - Domain/homology
Chem-P2E / Prostaglandin E2 receptor EP2 subtype / 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(s) subunit alpha isoforms short
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsQu, C. / Mao, C. / Xiao, P. / Shen, Q. / Zhong, Y. / Yang, F. / Shen, D. / Tao, X. / Zhang, H. / Yan, X. ...Qu, C. / Mao, C. / Xiao, P. / Shen, Q. / Zhong, Y. / Yang, F. / Shen, D. / Tao, X. / Zhang, H. / Yan, X. / Zhao, R. / He, J. / Guan, Y. / Zhang, C. / Hou, G. / Zhang, P. / Yu, X. / Guan, Y. / Sun, J. / Zhang, Y.
CitationJournal: Sci Adv / Year: 2021
Title: Ligand recognition, unconventional activation, and G protein coupling of the prostaglandin E receptor EP2 subtype.
Authors: Changxiu Qu / Chunyou Mao / Peng Xiao / Qingya Shen / Ya-Ni Zhong / Fan Yang / Dan-Dan Shen / Xiaona Tao / Huibing Zhang / Xu Yan / Ru-Jia Zhao / Junyan He / Ying Guan / Chao Zhang / Guihua ...Authors: Changxiu Qu / Chunyou Mao / Peng Xiao / Qingya Shen / Ya-Ni Zhong / Fan Yang / Dan-Dan Shen / Xiaona Tao / Huibing Zhang / Xu Yan / Ru-Jia Zhao / Junyan He / Ying Guan / Chao Zhang / Guihua Hou / Peng-Ju Zhang / Guige Hou / Zijian Li / Xiao Yu / Ren-Jie Chai / You-Fei Guan / Jin-Peng Sun / Yan Zhang /
Abstract: Selective modulation of the heterotrimeric G protein α S subunit-coupled prostaglandin E (PGE) receptor EP2 subtype is a promising therapeutic strategy for osteoporosis, ocular hypertension, ...Selective modulation of the heterotrimeric G protein α S subunit-coupled prostaglandin E (PGE) receptor EP2 subtype is a promising therapeutic strategy for osteoporosis, ocular hypertension, neurodegenerative diseases, and cardiovascular disorders. Here, we report the cryo-electron microscopy structure of the EP2-G complex with its endogenous agonist PGE and two synthesized agonists, taprenepag and evatanepag (CP-533536). These structures revealed distinct features of EP2 within the EP receptor family in terms of its unconventional receptor activation and G protein coupling mechanisms, including activation in the absence of a typical W "toggle switch" and coupling to G via helix 8. Moreover, inspection of the agonist-bound EP2 structures uncovered key motifs governing ligand selectivity. Our study provides important knowledge for agonist recognition and activation mechanisms of EP2 and will facilitate the rational design of drugs targeting the PGE signaling system.
History
DepositionSep 1, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0May 5, 2021Provider: repository / Type: Initial release
Revision 1.1Nov 6, 2024Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / em_admin / pdbx_entry_details / pdbx_initial_refinement_model / pdbx_modification_feature
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type / _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

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Assembly

Deposited unit
R: Prostaglandin E2 receptor EP2 subtype
A: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
G: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
N: Nanobody-35
hetero molecules


Theoretical massNumber of molelcules
Total (without water)147,0726
Polymers146,7205
Non-polymers3521
Water181
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area11950 Å2
ΔGint-52 kcal/mol
Surface area44260 Å2

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Components

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

#2: Protein Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Adenylate cyclase-stimulating G alpha protein


Mass: 45683.434 Da / Num. of mol.: 1
Mutation: S54N, G226A, E268A, N271K, K274D, R280K, T284D, I285T
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNAS, GNAS1, GSP / Cell (production host): sf9 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P63092
#3: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 39489.160 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNB1 / Cell (production host): sf9 / 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 / Cell (production host): sf9 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P59768

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Protein / Antibody , 2 types, 2 molecules RN

#1: Protein Prostaglandin E2 receptor EP2 subtype / PGE2 receptor EP2 subtype / Prostanoid EP2 receptor


Mass: 39800.430 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PTGER2 / Cell (production host): sf9 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P43116
#5: Antibody Nanobody-35


Mass: 13885.439 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)

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Non-polymers , 2 types, 2 molecules

#6: Chemical ChemComp-P2E / (Z)-7-[(1R,2R,3R)-3-hydroxy-2-[(E,3S)-3-hydroxyoct-1-enyl]-5-oxo-cyclopentyl]hept-5-enoic acid / Prostaglandin E2


Mass: 352.465 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C20H32O5 / Feature type: SUBJECT OF INVESTIGATION / Comment: medication*YM
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationY

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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

Component
IDNameTypeEntity IDParent-IDSource
1PGE2-bound EP2-Gs complexCOMPLEX#1-#50RECOMBINANT
2EP2COMPLEX#11RECOMBINANT
3Nb35COMPLEX#51RECOMBINANT
4GsCOMPLEX#2, #51RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23synthetic construct (others)32630
34Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-IDCell
12Spodoptera frugiperda (fall armyworm)7108sf9
23Escherichia coli (E. coli)562
34Spodoptera frugiperda (fall armyworm)7108
Buffer solutionpH: 7.5
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid type: Quantifoil
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen 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 FIELD / Nominal magnification: 29000 X / Calibrated magnification: 49310 X / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 64 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 2414
Image scansMovie frames/image: 40

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Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
EM software
IDNameVersionCategory
2SerialEMimage acquisition
4Gctfv1.18CTF correction
7Coot0.89model fitting
12RELION3.0-beta23D reconstruction
13PHENIX1.16model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 1928972
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 59163 / Symmetry type: POINT
Atomic model buildingPDB-ID: 7CFM

7cfm


Accession code: 7CFM / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0048086
ELECTRON MICROSCOPYf_angle_d0.61910963
ELECTRON MICROSCOPYf_dihedral_angle_d16.8194821
ELECTRON MICROSCOPYf_chiral_restr0.1531252
ELECTRON MICROSCOPYf_plane_restr0.0041400

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