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- PDB-9vjg: Cryo-EM structure of 5-HT1AR-Gz in complex with (R)-8-OH-DPAT -

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Basic information

Entry
Database: PDB / ID: 9vjg
TitleCryo-EM structure of 5-HT1AR-Gz in complex with (R)-8-OH-DPAT
Components
  • (Guanine nucleotide-binding protein ...) x 3
  • ScFv16
  • Soluble cytochrome b562,5-hydroxytryptamine receptor 1A
KeywordsMEMBRANE PROTEIN / signal transduction
Function / homology
Function and homology information


regulation of serotonin secretion / Gi/o-coupled serotonin receptor activity / regulation of hormone secretion / regulation of behavior / receptor-receptor interaction / serotonin receptor activity / Serotonin receptors / G protein-coupled serotonin receptor activity / serotonin receptor signaling pathway / regulation of dopamine metabolic process ...regulation of serotonin secretion / Gi/o-coupled serotonin receptor activity / regulation of hormone secretion / regulation of behavior / receptor-receptor interaction / serotonin receptor activity / Serotonin receptors / G protein-coupled serotonin receptor activity / serotonin receptor signaling pathway / regulation of dopamine metabolic process / neurotransmitter receptor activity / serotonin metabolic process / serotonin binding / gamma-aminobutyric acid signaling pathway / exploration behavior / adult behavior / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / regulation of vasoconstriction / behavioral fear response / adenylate cyclase-inhibiting serotonin receptor signaling pathway / electron transport chain / Olfactory Signaling Pathway / Activation of the phototransduction cascade / G protein-coupled acetylcholine receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G-protein activation / Glucagon signaling in metabolic regulation / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through CDC42 / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / G beta:gamma signalling through BTK / photoreceptor disc membrane / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / G alpha (z) signalling events / cellular response to catecholamine stimulus / ADP signalling through P2Y purinoceptor 1 / ADORA2B mediated anti-inflammatory cytokines production / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / cellular response to prostaglandin E stimulus / heterotrimeric G-protein complex / G alpha (12/13) signalling events / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / extracellular vesicle / sensory perception of taste / Thrombin signalling through proteinase activated receptors (PARs) / signaling receptor complex adaptor activity / retina development in camera-type eye / GTPase binding / fibroblast proliferation / Ca2+ pathway / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / G alpha (i) signalling events / G alpha (s) signalling events / phospholipase C-activating G protein-coupled receptor signaling pathway / G alpha (q) signalling events / chemical synaptic transmission / Ras protein signal transduction / periplasmic space / electron transfer activity / Extra-nuclear estrogen signaling / cell population proliferation / iron ion binding / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / heme binding / positive regulation of cell population proliferation / synapse / dendrite / protein-containing complex binding / signal transduction / extracellular exosome / membrane / plasma membrane / cytoplasm / cytosol
Similarity search - Function
5-Hydroxytryptamine 1A receptor / 5-hydroxytryptamine receptor family / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / Serpentine type 7TM GPCR chemoreceptor Srsx / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily ...5-Hydroxytryptamine 1A receptor / 5-hydroxytryptamine receptor family / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / Serpentine type 7TM GPCR chemoreceptor Srsx / 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 / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / 7 transmembrane receptor (rhodopsin family) / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 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. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
: / CHOLESTEROL / Chem-T7M / 5-hydroxytryptamine receptor 1A / Soluble cytochrome b562 / 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
Similarity search - Component
Biological speciesHomo sapiens (human)
Mus musculus (house mouse)
Escherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.67 Å
AuthorsWang, C. / Cao, C.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)GG9100007022 China
CitationJournal: Cell / Year: 2025
Title: Pathway-selective 5-HTR agonist as a rapid antidepressant strategy.
Authors: Chunyu Wang / Nan Zhang / Yujie Shao / Tao Li / Mengna Zhang / Meng Gao / Yaqi Liang / Yumeng Wang / Tian Xue / Yiming Shi / He Chen / Can Cao /
Abstract: Presynaptic 5-HTR autoreceptors predominantly signal through G protein, mediating feedback inhibition that hampers the therapeutic efficacy of conventional antidepressants. By contrast, postsynaptic ...Presynaptic 5-HTR autoreceptors predominantly signal through G protein, mediating feedback inhibition that hampers the therapeutic efficacy of conventional antidepressants. By contrast, postsynaptic heteroreceptors mainly couple to G, which promotes antidepressant responses. However, selectively activating heteroreceptors while bypassing the negative feedback induced by autoreceptors remains a significant challenge. Here, we characterized the G subtype signaling profiles of 5-HTR and determined its structures in complex with six agonists and three distinct G family proteins: G, G, and G. Combined with functional analysis, we elucidated the mechanisms underlying diverse agonist recognition modes and G subtype signaling selectivity of 5-HTR. Furthermore, we designed a pathway-selective agonist, TMU4142, which exhibits high G activity while minimizing G activation. Remarkably, TMU4142 demonstrated rapid antidepressant-like effects in a mouse model of depression. Collectively, these findings suggest that distinguishing heteroreceptors from autoreceptors based on their distinct downstream G signaling pathways could be a promising strategy to develop fast-acting antidepressants.
History
DepositionJun 19, 2025Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Nov 12, 2025Provider: repository / Type: Initial release
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
B: Guanine nucleotide-binding protein G(z) subunit alpha
C: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
D: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
E: ScFv16
R: Soluble cytochrome b562,5-hydroxytryptamine receptor 1A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)177,4679
Polymers175,4935
Non-polymers1,9744
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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

#1: Protein Guanine nucleotide-binding protein G(z) subunit alpha


Mass: 40613.359 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Spodoptera frugiperda (fall armyworm)
#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1


Mass: 39418.086 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
#3: 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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Antibody / Protein , 2 types, 2 molecules ER

#4: Antibody ScFv16


Mass: 26679.721 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Spodoptera frugiperda (fall armyworm)
#5: Protein Soluble cytochrome b562,5-hydroxytryptamine receptor 1A / Cytochrome b-562 / 5-HT-1A / 5-HT1A / G-21 / Serotonin receptor 1A


Mass: 60921.188 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli), (gene. exp.) Homo sapiens (human)
Gene: cybC, HTR1A, ADRB2RL1, ADRBRL1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P0ABE7, UniProt: P08908

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Non-polymers , 3 types, 4 molecules

#6: Chemical ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C27H46O
#7: Chemical ChemComp-T7M / (2R)-1-(heptadecanoyloxy)-3-{[(R)-hydroxy{[(1R,2R,3R,4R,5S,6R)-2,3,5,6-tetrahydroxy-4-(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}propan-2-yl (5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoate / Phosphatidylinositol-4-phosphate


Mass: 953.081 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C46H82O16P2
#8: Chemical ChemComp-A1ESE / (7~{R})-7-(dipropylamino)-5,6,7,8-tetrahydronaphthalen-1-ol


Mass: 247.376 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C16H25NO / Feature type: SUBJECT OF INVESTIGATION

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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

ComponentName: Cryo-EM structure of 5-HT1AR-Gz in complex with (R)-8-OH-DPAT
Type: COMPLEX / Entity ID: #1-#5 / Source: RECOMBINANT
Molecular weightValue: 0.15 MDa / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm) / Cell: sf9
Buffer solutionpH: 7.5
SpecimenConc.: 1.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 18000 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARCv4.4.1particle selection
11cryoSPARCv4.4.1final Euler assignment
13cryoSPARCv4.413D reconstruction
CTF correctionType: NONE
Particle selectionNum. of particles selected: 1373517
3D reconstructionResolution: 2.67 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 105515 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 59.23 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.01029570
ELECTRON MICROSCOPYf_angle_d0.861413016
ELECTRON MICROSCOPYf_chiral_restr0.05631522
ELECTRON MICROSCOPYf_plane_restr0.00581637
ELECTRON MICROSCOPYf_dihedral_angle_d16.45993319

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