[3H]nicotine [Ligand Id: 3978] activity data from GtoPdb and ChEMBL
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| ChEMBL ligand: CHEMBL440464 |
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| DB | Assay description | Assay Type | Standard value | Standard parameter | Original value | Original units | Original parameter | Reference |
|---|---|---|---|---|---|---|---|---|
| nicotinic acetylcholine receptor β2 subunit/nicotinic acetylcholine receptor α2 subunit/Neuronal acetylcholine receptor; alpha2/beta2 in Human (target type: PROTEIN COMPLEX) [ChEMBL: CHEMBL2109236] [GtoPdb: 472, 463] [UniProtKB: P17787, Q15822] | ||||||||
| ChEMBL | [3H]-Epibatidine Radioligand Binding Assay: Briefly, cultured cells at >80% confluence were removed from their flasks (80 cm2) with a disposable cell scraper and placed in 10 mL of 50 mM Tris.HCl buffer (pH 7.4, 4° C.). The cell suspension was centrifuged at 10,000×g for 5 min and the pellet was collected. The cell pellet was then homogenized in 10 mL buffer with a polytron homogenizer and centrifuged at 36,000 g for 10 min at 4° C. The membrane pellet was resuspended in fresh buffer, and aliquots of the membrane preparation were used for binding assays. The concentration of [3H]-epibatidine used was ˜500 pM for competition binding assays. Nonspecific binding was assessed in parallel incubations in the presence of 300 μM nicotine. Bound and free ligands were separated by vacuum filtration through Whatman GF/C filters treated with 0.5% polyethylenimine. The filter-retained radioactivity was measured by liquid scintillation counting. Specific binding was defined as the difference between total binding and nonspecific binding. Data from competition binding assays were analyzed using Prism 5 (GraphPad Software, San Diego, Calif.). | B | 7.92 | pKi | 12 | nM | Ki | US-9993465-B2. 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof (2018) |
| nicotinic acetylcholine receptor β4 subunit/nicotinic acetylcholine receptor α3 subunit/Neuronal acetylcholine receptor; alpha3/beta4 in Human (target type: PROTEIN COMPLEX) [ChEMBL: CHEMBL1907594] [GtoPdb: 474, 464] [UniProtKB: P30926, P32297] | ||||||||
| ChEMBL | Binding to Nicotinic Receptor Subtypes: The binding of a group of compounds mentioned above were tested for their affinity at different nAChR subtypes, specifically the α4β2, the α3β4 and α7. The protocol for these tests is set out below, and the results are provided at Table 1 below. Binding to Heterologously Expressed_α4β2 and α3β4 Human SubtypesHEK 293 cells were grown in Dulbecco's modified Eagle medium supplemented with 10% fetal bovine serum, 1% L-Glutamine, 100 units/ml penicillin G, and 100 μg/streptomycin in a humidified atmosphere containing 10% CO2. The cDNAs encoding α3 and β4 or α4 and β2 (were transfected into the HEK 293 cells at 30% confluency). The cell transfections were carried out in 100 mm Petri dishes using 30 μL of JetPEI (Polypus, France) (1 mg/ml, pH 7.2) and 3 μg of each cDNA. After 24 h transfection, the cells were collected, washed with PBS by centrifugation, and used for binding analysis.[3H]-epibatidine saturation binding experiments to HEK transfected α3β4 or α4β2 receptors were performed by means of overnight incubation at 4° C. at concentrations ranging from 0.005 to 1 nM in a buffer containing 50 mM Tris-HCl, pH 7, 150 mM NaCl, 5 mM KCl, 1 mM MgCl2, 2.5 mM CaCl2and 2 mg/ml BSA, in the presence (aspecific binding) or absence (total binding) of 100 nM cold epibatidine. Specific ligand binding was defined as total binding minus the binding in the presence of 100 nM cold epibatidine. | B | 6.76 | pKi | 172 | nM | Ki | US-11667638-B2. 4-substitued cytisine analogues (2023) |
| nicotinic acetylcholine receptor β2 subunit/nicotinic acetylcholine receptor α4 subunit/Neuronal acetylcholine receptor; alpha4/beta2 in Human (target type: PROTEIN COMPLEX) [ChEMBL: CHEMBL1907589] [GtoPdb: 472, 465] [UniProtKB: P17787, P43681] | ||||||||
| ChEMBL | Binding to Nicotinic Receptor Subtypes: The binding of a group of compounds mentioned above were tested for their affinity at different nAChR subtypes, specifically the α4β2, the α3β4 and α7. The protocol for these tests is set out below, and the results are provided at Table 1 below. Binding to Heterologously Expressed_α4β2 and α3β4 Human SubtypesHEK 293 cells were grown in Dulbecco's modified Eagle medium supplemented with 10% fetal bovine serum, 1% L-Glutamine, 100 units/ml penicillin G, and 100 μg/streptomycin in a humidified atmosphere containing 10% CO2. The cDNAs encoding α3 and β4 or α4 and β2 (were transfected into the HEK 293 cells at 30% confluency). The cell transfections were carried out in 100 mm Petri dishes using 30 μL of JetPEI (Polypus, France) (1 mg/ml, pH 7.2) and 3 μg of each cDNA. After 24 h transfection, the cells were collected, washed with PBS by centrifugation, and used for binding analysis.[3H]-epibatidine saturation binding experiments to HEK transfected α3β4 or α4β2 receptors were performed by means of overnight incubation at 4° C. at concentrations ranging from 0.005 to 1 nM in a buffer containing 50 mM Tris-HCl, pH 7, 150 mM NaCl, 5 mM KCl, 1 mM MgCl2, 2.5 mM CaCl2and 2 mg/ml BSA, in the presence (aspecific binding) or absence (total binding) of 100 nM cold epibatidine. Specific ligand binding was defined as total binding minus the binding in the presence of 100 nM cold epibatidine. | B | 8.07 | pKi | 8.6 | nM | Ki | US-11667638-B2. 4-substitued cytisine analogues (2023) |
| nicotinic acetylcholine receptor β2 subunit/nicotinic acetylcholine receptor α4 subunit in Rat [GtoPdb: 472, 465] [UniProtKB: P12390, P09483] | ||||||||
| GtoPdb | - | - | 9.4 | pKd | 0.4 | nM | Kd | |
ChEMBL data shown on this page come from version 36:
Zdrazil B, Felix E, Hunter F, Manners EJ, Blackshaw J, Corbett S, de Veij M, Ioannidis H, Lopez DM, Mosquera JF, Magarinos MP, Bosc N, Arcila R, Kizilören T, Gaulton A, Bento AP, Adasme MF, Monecke P, Landrum GA, Leach AR. (2024). The ChEMBL Database in 2023: a drug discovery platform spanning multiple bioactivity data types and time periods. Nucleic Acids Res., 52(D1). DOI: 10.1093/nar/gkad1004. [EPMCID:10767899] [PMID:37933841]
Davies M, Nowotka M, Papadatos G, Dedman N, Gaulton A, Atkinson F, Bellis L, Overington JP. (2015) 'ChEMBL web services: streamlining access to drug discovery data and utilities.' Nucleic Acids Res., 43(W1). DOI: 10.1093/nar/gkv352. [EPMCID:25883136]
