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- EMDB-46828: Cannabinoid receptor 1-Gi complex with novel ligand -

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Basic information

Entry
Database: EMDB / ID: EMD-46828
TitleCannabinoid receptor 1-Gi complex with novel ligand
Map data
Sample
  • Complex: Signaling complex of the cannabinoid receptor 1 bound to Gi
    • Protein or peptide: Cannabinoid receptor 1
  • Ligand: methyl (2R)-2-({(1M)-5-methyl-1-[3-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonyl}amino)-2-(thiophen-2-yl)propanoate
KeywordsGPCR / G protein / Gi / cannabinoid receptor / CB1 / SIGNALING PROTEIN
Function / homology
Function and homology information


cannabinoid signaling pathway / regulation of penile erection / negative regulation of dopamine secretion / retrograde trans-synaptic signaling by endocannabinoid / cannabinoid receptor activity / negative regulation of mast cell activation / negative regulation of fatty acid beta-oxidation / negative regulation of serotonin secretion / positive regulation of acute inflammatory response to antigenic stimulus / regulation of feeding behavior ...cannabinoid signaling pathway / regulation of penile erection / negative regulation of dopamine secretion / retrograde trans-synaptic signaling by endocannabinoid / cannabinoid receptor activity / negative regulation of mast cell activation / negative regulation of fatty acid beta-oxidation / negative regulation of serotonin secretion / positive regulation of acute inflammatory response to antigenic stimulus / regulation of feeding behavior / regulation of presynaptic cytosolic calcium ion concentration / negative regulation of action potential / positive regulation of blood pressure / positive regulation of fever generation / Class A/1 (Rhodopsin-like receptors) / axonal fasciculation / regulation of metabolic process / regulation of synaptic transmission, GABAergic / G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger / maternal process involved in female pregnancy / regulation of synaptic transmission, glutamatergic / negative regulation of blood pressure / response to nutrient / regulation of insulin secretion / GABA-ergic synapse / response to nicotine / response to cocaine / G protein-coupled receptor activity / positive regulation of neuron projection development / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / memory / adenylate cyclase-activating G protein-coupled receptor signaling pathway / glucose homeostasis / actin cytoskeleton / presynaptic membrane / growth cone / G alpha (i) signalling events / spermatogenesis / response to lipopolysaccharide / response to ethanol / mitochondrial outer membrane / positive regulation of apoptotic process / membrane raft / glutamatergic synapse / identical protein binding / plasma membrane / cytoplasm
Similarity search - Function
Cannabinoid receptor type 1 / Cannabinoid receptor family / Serpentine type 7TM GPCR chemoreceptor Srsx / 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)
Similarity search - Domain/homology
Cannabinoid receptor 1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.35 Å
AuthorsTummino TA / Iliopoulos-Tsoutsouvas C / Braz JM / O'Brien ES / Krishna Kumar K / Makriyannis M / Basbaum AI / Shoichet BK
Funding support United States, 1 items
OrganizationGrant numberCountry
Defense Advanced Research Projects Agency (DARPA)HR0011-19-2-0020 United States
CitationJournal: Nat Commun / Year: 2025
Title: Virtual library docking for cannabinoid-1 receptor agonists with reduced side effects.
Authors: Tia A Tummino / Christos Iliopoulos-Tsoutsouvas / Joao M Braz / Evan S O'Brien / Reed M Stein / Veronica Craik / Ngan K Tran / Suthakar Ganapathy / Fangyu Liu / Yuki Shiimura / Fei Tong / ...Authors: Tia A Tummino / Christos Iliopoulos-Tsoutsouvas / Joao M Braz / Evan S O'Brien / Reed M Stein / Veronica Craik / Ngan K Tran / Suthakar Ganapathy / Fangyu Liu / Yuki Shiimura / Fei Tong / Thanh C Ho / Dmytro S Radchenko / Yurii S Moroz / Sian Rodriguez Rosado / Karnika Bhardwaj / Jorge Benitez / Yongfeng Liu / Herthana Kandasamy / Claire Normand / Meriem Semache / Laurent Sabbagh / Isabella Glenn / John J Irwin / Kaavya Krishna Kumar / Alexandros Makriyannis / Allan I Basbaum / Brian K Shoichet /
Abstract: Virtual library docking can reveal unexpected chemotypes that complement the structures of biological targets. Seeking agonists for the cannabinoid-1 receptor (CB1R), we dock 74 million tangible ...Virtual library docking can reveal unexpected chemotypes that complement the structures of biological targets. Seeking agonists for the cannabinoid-1 receptor (CB1R), we dock 74 million tangible molecules and prioritize 46 high ranking ones for de novo synthesis and testing. Nine are active by radioligand competition, a 20% hit-rate. Structure-based optimization of one of the most potent of these (K = 0.7 µM) leads to '1350, a 0.95 nM ligand and a full CB1R agonist of G signaling. A cryo-EM structure of '1350 in complex with CB1R-G confirms its predicted docked pose. The lead agonist is strongly analgesic in male mice, with a 2-20-fold therapeutic window over hypolocomotion, sedation, and catalepsy and no observable conditioned place preference. These findings suggest that unique cannabinoid chemotypes may disentangle characteristic cannabinoid side-effects from analgesia, supporting the further development of cannabinoids as pain therapeutics.
History
DepositionSep 2, 2024-
Header (metadata) releaseApr 30, 2025-
Map releaseApr 30, 2025-
UpdateMay 7, 2025-
Current statusMay 7, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_46828.png

Downloads & links

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Map

FileDownload / File: emd_46828.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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AxesZ (Sec.)Y (Row.)X (Col.)
0.85 Å/pix.
x 320 pix.
= 272.672 Å		0.85 Å/pix.
x 320 pix.
= 272.672 Å		0.85 Å/pix.
x 320 pix.
= 272.672 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.8521 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.582
Minimum - Maximum-5.499356 - 5.338245
Average (Standard dev.)-0.002069491 (±0.047273967)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 272.672 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_46828_msk_1.map
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Half map: #1

Fileemd_46828_half_map_1.map
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Histogram

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Half map: #2

Fileemd_46828_half_map_2.map
Projections & Slices
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Sample components

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Entire : Signaling complex of the cannabinoid receptor 1 bound to Gi

EntireName: Signaling complex of the cannabinoid receptor 1 bound to Gi
Components
  • Complex: Signaling complex of the cannabinoid receptor 1 bound to Gi
    • Protein or peptide: Cannabinoid receptor 1
  • Ligand: methyl (2R)-2-({(1M)-5-methyl-1-[3-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonyl}amino)-2-(thiophen-2-yl)propanoate

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Supramolecule #1: Signaling complex of the cannabinoid receptor 1 bound to Gi

SupramoleculeName: Signaling complex of the cannabinoid receptor 1 bound to Gi
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Cannabinoid receptor 1

MacromoleculeName: Cannabinoid receptor 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 55.678535 KDa
Recombinant expressionOrganism: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
SequenceString: DYKDDDDAMK SILDGLADTT FRTITTDLLY VGSNDIQYED IKGDMASKLG YFPQKFPLTS FRGSPFQEKM TAGDNPQLVP ADQVNITEF YNKSLSENLY FQGSFKENEE NIQCGENFMD IECFMVLNPS QQLAIAVLSL TLGTFTVLEN LLVLCVILHS R SLRCRPSY ...String:
DYKDDDDAMK SILDGLADTT FRTITTDLLY VGSNDIQYED IKGDMASKLG YFPQKFPLTS FRGSPFQEKM TAGDNPQLVP ADQVNITEF YNKSLSENLY FQGSFKENEE NIQCGENFMD IECFMVLNPS QQLAIAVLSL TLGTFTVLEN LLVLCVILHS R SLRCRPSY HFIGSLAVAD LLGSVIFVYS FIDFHVFHRK DSRNVFLFKL GGVTASFTAS VGSLFLTAID RYISIHRPLA YK RIVTRPK AVVAFCLMWT IAIVIAVLPL LGWNCEKLQS VCSDIFPHID ETYLMFWIGV TSVLLLFIVY AYMYILWKAH SHA VRMIQR GTQKSIIIHT SEDGKVQVTR PDQARMDIRL AKTLVLILVV LIICWGPLLA IMVYDVFGKM NKLIKTVFAF CSML CLLNS TVNPIIYALR SKDLRHAFRS MFPSCEGTAQ PLDNSMGDSD CLHKHANNAA SVHRAAESCI KSTVKIAKVT MSVST DTSA EALGSHHHHH H

UniProtKB: Cannabinoid receptor 1

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Macromolecule #2: methyl (2R)-2-({(1M)-5-methyl-1-[3-(trifluoromethyl)phenyl]-1H-py...

MacromoleculeName: methyl (2R)-2-({(1M)-5-methyl-1-[3-(trifluoromethyl)phenyl]-1H-pyrazole-3-carbonyl}amino)-2-(thiophen-2-yl)propanoate
type: ligand / ID: 2 / Number of copies: 1 / Formula: YVF
Molecular weightTheoretical: 437.435 Da

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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: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 56.6 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.7000000000000001 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6n4b

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.35 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 465411
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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