CHRNB2
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Summary
CHRNB2 (cholinergic receptor nicotinic beta 2 subunit, HGNC:1962) is a protein-coding gene on chromosome 1q21.3, encoding Neuronal acetylcholine receptor subunit beta-2 (P17787). Component of neuronal acetylcholine receptors (nAChRs) that function as pentameric, ligand-gated cation channels with high calcium permeability among other activities. nAChRs are excitatory neurotrasnmitter receptors formed by a collection of nAChR subunits known to mediate syna….
Neuronal acetylcholine receptors are homo- or heteropentameric complexes composed of homologous alpha and beta subunits. They belong to a superfamily of ligand-gated ion channels which allow the flow of sodium and potassium across the plasma membrane in response to ligands such as acetylcholine and nicotine. This gene encodes one of several beta subunits. Mutations in this gene are associated with autosomal dominant nocturnal frontal lobe epilepsy.
Source: NCBI Gene 1141 — RefSeq curated summary.
At a glance
- Gene–disease (curated): familial sleep-related hypermotor epilepsy (Definitive, ClinGen) — +2 more curated relationships
- GWAS associations: 3
- Clinical variants (ClinVar): 687 total — 2 pathogenic, 3 likely-pathogenic
- Phenotypes (HPO): 23
- Druggable target: yes — 26 molecules with ChEMBL bioactivity
- MANE Select transcript:
NM_000748
Identifiers
Gene identifiers
| Field | Value |
|---|---|
| HGNC ID | HGNC:1962 |
| Approved symbol | CHRNB2 |
| Name | cholinergic receptor nicotinic beta 2 subunit |
| Location | 1q21.3 |
| Locus type | gene with protein product |
| Status | Approved |
| Ensembl gene | ENSG00000160716 |
| Ensembl biotype | protein_coding |
| OMIM | 118507 |
| Entrez | 1141 |
Gene structure
Transcript identifiers
Ensembl transcripts: 5 — 2 protein_coding, 2 protein_coding_CDS_not_defined, 1 nonsense_mediated_decay
ENST00000368476, ENST00000635876, ENST00000636034, ENST00000636695, ENST00000637900
RefSeq mRNA: 1 — MANE Select: NM_000748
NM_000748
CCDS: CCDS1070
Canonical transcript exons
ENST00000368476 — 6 exons
| Exon | Start | End |
|---|---|---|
| ENSE00001053945 | 154569462 | 154569607 |
| ENSE00001053946 | 154569792 | 154569836 |
| ENSE00001053947 | 154571189 | 154572161 |
| ENSE00001053948 | 154570258 | 154570367 |
| ENSE00001447217 | 154575762 | 154580013 |
| ENSE00001447218 | 154567778 | 154568108 |
Expression profiles
Bgee: expression breadth ubiquitous, 208 present calls, max score 94.34.
FANTOM5 (CAGE): breadth broad, TPM avg 2.6077 / max 112.4383, expressed in 240 samples.
FANTOM5 promoters (4 alternative TSS)
| Promoter ID | TPM avg | Samples expressed |
|---|---|---|
| 5526 | 1.2671 | 218 |
| 5525 | 0.9423 | 146 |
| 5524 | 0.3770 | 114 |
| 5523 | 0.0214 | 6 |
Top tissues by expression
248 total, by Bgee expression score (0-100, higher = more expressed):
| Tissue | Anatomy ID | Expression score | Quality |
|---|---|---|---|
| tongue squamous epithelium | UBERON:0006919 | 94.34 | silver quality |
| cervix squamous epithelium | UBERON:0006922 | 92.31 | silver quality |
| type B pancreatic cell | CL:0000169 | 92.16 | silver quality |
| olfactory bulb | UBERON:0002264 | 91.07 | silver quality |
| vena cava | UBERON:0004087 | 89.75 | silver quality |
| lateral nuclear group of thalamus | UBERON:0002736 | 89.74 | gold quality |
| substantia nigra pars reticulata | UBERON:0001966 | 88.23 | gold quality |
| lateral globus pallidus | UBERON:0002476 | 87.95 | gold quality |
| subthalamic nucleus | UBERON:0001906 | 87.42 | silver quality |
| cervix epithelium | UBERON:0004801 | 87.41 | silver quality |
| pharyngeal mucosa | UBERON:0000355 | 87.14 | silver quality |
| ventral tegmental area | UBERON:0002691 | 86.99 | silver quality |
| body of tongue | UBERON:0011876 | 86.90 | silver quality |
| substantia nigra pars compacta | UBERON:0001965 | 86.89 | gold quality |
| cardia of stomach | UBERON:0001162 | 86.88 | silver quality |
| periodontal ligament | UBERON:0008266 | 86.88 | gold quality |
| upper arm skin | UBERON:0004263 | 86.80 | silver quality |
| cortical plate | UBERON:0005343 | 86.75 | gold quality |
| dorsal plus ventral thalamus | UBERON:0001897 | 86.56 | gold quality |
| inferior vagus X ganglion | UBERON:0005363 | 86.56 | silver quality |
| tongue | UBERON:0001723 | 86.53 | silver quality |
| gluteal muscle | UBERON:0002000 | 86.51 | silver quality |
| right frontal lobe | UBERON:0002810 | 86.45 | gold quality |
| pylorus | UBERON:0001166 | 86.28 | silver quality |
| gingival epithelium | UBERON:0001949 | 86.25 | gold quality |
| buccal mucosa cell | CL:0002336 | 85.96 | silver quality |
| pericardium | UBERON:0002407 | 85.86 | silver quality |
| pons | UBERON:0000988 | 85.47 | gold quality |
| prefrontal cortex | UBERON:0000451 | 85.43 | gold quality |
| superior surface of tongue | UBERON:0007371 | 85.32 | silver quality |
Single-cell (SCXA)
Detected in 1 experiment(s), a significant marker in 0.
| Experiment | Marker? | Max mean expression |
|---|---|---|
| E-ANND-3 | no | 2.61 |
Regulation
Is transcription factor: no
Upstream regulators (CollecTRI, top): REST
miRNA regulators (miRDB)
119 targeting CHRNB2, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):
| miRNA | Max score | Avg score | miRNA target_count |
|---|---|---|---|
| HSA-MIR-4533 | 100.00 | 69.48 | 2758 |
| HSA-MIR-29A-3P | 100.00 | 73.11 | 1835 |
| HSA-MIR-29B-3P | 100.00 | 73.18 | 1833 |
| HSA-MIR-29C-3P | 100.00 | 73.15 | 1833 |
| HSA-MIR-4476 | 100.00 | 68.18 | 2030 |
| HSA-MIR-6876-5P | 100.00 | 67.68 | 2126 |
| HSA-MIR-4534 | 99.99 | 66.58 | 1907 |
| HSA-MIR-6077 | 99.99 | 68.04 | 2299 |
| HSA-MIR-150-5P | 99.99 | 66.69 | 1976 |
| HSA-MIR-3667-3P | 99.99 | 67.17 | 1636 |
| HSA-MIR-10401-5P | 99.99 | 65.79 | 948 |
| HSA-MIR-4650-5P | 99.98 | 64.69 | 999 |
| HSA-MIR-4725-3P | 99.96 | 69.53 | 2520 |
| HSA-MIR-6780B-5P | 99.96 | 69.60 | 2562 |
| HSA-MIR-4267 | 99.96 | 66.53 | 2368 |
| HSA-MIR-2110 | 99.96 | 66.68 | 1930 |
| HSA-MIR-8082 | 99.95 | 67.27 | 1170 |
| HSA-MIR-1236-3P | 99.94 | 68.04 | 1695 |
| HSA-MIR-497-5P | 99.92 | 71.83 | 2674 |
| HSA-MIR-1297 | 99.91 | 73.41 | 3162 |
| HSA-MIR-15A-5P | 99.90 | 72.80 | 2787 |
| HSA-MIR-15B-5P | 99.90 | 72.78 | 2798 |
| HSA-MIR-16-5P | 99.90 | 72.80 | 2780 |
| HSA-MIR-195-5P | 99.90 | 72.81 | 2805 |
| HSA-MIR-424-5P | 99.89 | 71.90 | 2641 |
| HSA-MIR-6838-5P | 99.89 | 71.94 | 2690 |
| HSA-MIR-4271 | 99.88 | 68.32 | 2244 |
| HSA-MIR-7845-5P | 99.88 | 64.88 | 771 |
| HSA-MIR-4492 | 99.87 | 68.25 | 3611 |
| HSA-MIR-3151-5P | 99.86 | 63.83 | 1069 |
Literature-anchored findings (GeneRIF, showing 40)
- Changes in nicotinic acetylcholine receptor subunits expression in brain of patients with Down syndrome and Alzheimer’s disease. (PMID:11771745)
- CHRNB2 is a logical candidate for influencing smoking behavior and nicotine dependence (PMID:11906688)
- autosomal dominant nocturnal frontal lobe epilepsy probands were analyzed for the presence of V287L and V287M mutations in the CHRNB2 gene. No mutations in the analyzed region of CHRNB2 found. (PMID:11952766)
- Mutations of the gene encoding CHRNB2 may be linked to nocturnal frontal lobe epilepsy. (PMID:12185808)
- CHRNB2 subunit is expressed in the soma of the majority of pyramidal cells, with the most beta 2 immunoreactivity observed in CA2-4 and entorhinal cortex and relatively less in CA1 and subicular pyramidal cell soma. (PMID:12663058)
- Mutations in genes coding for the alpha 4 and beta 2 subunits of the neuronal nicotinic acetylcholine receptor receptor (CHRN) are known to cause autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE). (PMID:12681012)
- A significant association for Alzheimer’s disease is observed for a non-coding polymorphism in CHRNB2 subunit. (PMID:15026168)
- Nicotinic acetylcholine receptor beta 2 subunit polymorphisms are not a useful marker for prediction of the susceptibility.to febrile seizures. (PMID:15033200)
- Reduced gene expression of the alpha4beta2 nicotinic receptor in the cerebral cortex is a major feature of the neurochemical pathology of autism, whilst post-transcriptional abnormalities of both this and the alpha7 subtype are apparent in the cerebellum (PMID:15046869)
- A common haplotype of the nicotine acetylcholine receptor alpha 4 subunit gene is associated with vulnerability to nicotine addiction in men (PMID:15154117)
- alpha3beta2 nicotinic receptor has a role in regulating gene expression after tobacco exposure in oral epithelial cells (PMID:15681842)
- Here, we report a new CHRNB2 mutation located in transmembrane region 3 (M3), outside the known ADNFLE mutation cluster. The CHRNB2 mutation I312M, which occurred de novo in twins, markedly increases the receptor’s sensitivity to acetylcholine. (PMID:15964197)
- nicotinic modulation of thalamo-cortical circuitry as a key component in the control of conscious awareness in dementia with Lewy bodies (PMID:16023355)
- M1 domains on both alpha4 and beta2 play an important role for efficient expression of extracellular domain alpha4beta2 nAChRs that are high fidelity structural models of full-length alpha4beta2 nAChR (PMID:16174636)
- nicotine-induced up-regulation of alpha4beta2 acetylcholine receptors resulted primarily from an increase in assembly from large pools of unassembled subunits, but up-regulation also resulted from a 5-fold increase in the lifetime in the surface membrane (PMID:16183856)
- analysis of single channel conductance within the large cytoplasmic loop of 5-hydroxytryptamine type 3 and alpha4beta2 nicotinic acetylcholine receptors (PMID:16407231)
- Our present study provided the first line of direct evidence suggesting that the CHRNA4 gene combined with CHRNB2 receptor gene may be linked to schizophrenia. (PMID:16636791)
- Greater beta2*-nAChR availability during early abstinence may impact the ability of smokers to maintain abstinence. (PMID:16928859)
- This study provides the first evidence for association between the CHRNB2 gene and nicotine- and alcohol-related phenotypes, and suggests that polymorphisms in CHRNB2 may be important in mediating early responses to nicotine and alcohol. (PMID:17226798)
- To our knowledge, this is the third family reported presenting a mutation in CHRNB2 in nocturnal frontal lobe epilepsy. (PMID:17900292)
- results do not demonstrate a significant genetic difference in 7 markers from the CHRNA4 and CHRNB2 genes between schizophrenia patients who smoke and those who do not (PMID:18043764)
- These results in living human subjects corroborate postmortem reports of decline in high affinity nicotine binding with age and may aid in elucidating the role of beta(2)-nAChRs in cognitive aging. (PMID:18242781)
- Genetic testing revealed the CHRNB2 mutation I312M in transmembrane region 3 (M3) of the neuronal nicotinic acetylcholine receptor. (PMID:18534914)
- An SNP (rs2072661) in the 3’ UTR region of the CHRNB2 has an impact on abstinence rates at the end of treatment and after a 6-month follow-up period. (PMID:18593715)
- CHRNA4 and CHRNB2 do not play a major role in Japanese schizophrenia. (PMID:18762859)
- Results suggest that neither CHRNA4 nor CHRNB2 plays a major role in Japanese methamphetamine-use disorder. (PMID:18991851)
- Results report that overexpression of VILIP-1 enhances ACh responsiveness, whereas siRNA against VILIP-1 reduces alpha4beta2 nAChR currents of hippocampal neurons. (PMID:19063970)
- results indicate activation of protein kinase A & protein kinase C leads to phosphorylation of alpha4beta2 receptors at different stages of receptor formation & maturation & has different effects on expression & function of alpha4beta2 receptors (PMID:19101612)
- Extracellular beta1-beta2 and cysteine-loops bridge the pre-M1 transmembrane domain and M2-M3 linker to transduce agonist binding into channel gating. (PMID:19279256)
- There was no evidence of association of any of the SNPs in CHRNAB2 (rs2072661, rs4845378) or CHRNAB3 (rs4953, rs6474413) with smoking status (p=0.30) or, among daily smokers, of association with cotinine levels (p=0.08). (PMID:19482438)
- analysis of the agonist bindnig site of alpha4beta2 nicotinic acetylcholine receptors (PMID:19620239)
- association of a 3’ untranslated region polymorphism (rs2072661) in the nicotinic acetylcholine receptor beta2 subunit (CHRNB2) gene with quitting success in response to nicotine versus placebo patch during a short-term test of patch effects. (PMID:19755656)
- Data suggests that beta(2)*-nAChRs play a role in pain sensitivity but not pain tolerance during tobacco smoking withdrawal. (PMID:20371741)
- Using high-resolution NMR spectroscopy, we solved the structure of the entire transmembrane domain (TM1234) of the beta2 subunit. We found that TM1234 formed a four-helix bundle in the absence of the extracellular and intracellular domains. (PMID:20441771)
- A novel mutant mouse harboring the human ADNFLE mutation in the Chrnb2 gene was generated and used to study the roles of beta2* nicotinic receptors in complex biological processes including the activity-rest cycle, natural reward and anxiety. (PMID:20603624)
- Used analysis of non-stationary noise to estimate the maximal probability the nicotinic alpha4beta2 receptor is open. (PMID:20649589)
- variation in the promoter region of CHRNB2 gene may be important in mediating levels of expression of the beta2 nicotinic receptor subunit, which may be associated with variation in subjective response to nicotine (PMID:20854418)
- The high sensitivity to activation and desensitization of (alpha4beta2)alpha5 nAChRbeta2 by nicotine results in a narrow concentration range in which activation and desensitization curves overlap. (PMID:20881005)
- Concatameric pentamers and pentamers formed from combinations of trimers, dimers, and monomers of alpha6beta2beta3* acetylcholine receptors exhibit similar properties, indicating that the linkers between subunits do not alter their functional properties. (PMID:20923852)
- A signaling cascade involving Janus kinase-2 and signal transducer and activator of transcription 3 mediates anti-inflammatory effects through alpha4beta2 nicotinic receptors. (PMID:20943775)
Cross-species orthologs
4 orthologs
| Organism | Symbol | Gene ID |
|---|---|---|
| danio_rerio | chrnb2 | ENSDARG00000017790 |
| danio_rerio | chrnb5b | ENSDARG00000021392 |
| mus_musculus | Chrnb2 | ENSMUSG00000027950 |
| rattus_norvegicus | Chrnb2 | ENSRNOG00000020778 |
Paralogs (45): GABRA3 (ENSG00000011677), GABRA1 (ENSG00000022355), CHRNA3 (ENSG00000080644), GABRP (ENSG00000094755), CHRNA4 (ENSG00000101204), GLRA2 (ENSG00000101958), GABRE (ENSG00000102287), CHRNE (ENSG00000108556), GABRA4 (ENSG00000109158), GLRB (ENSG00000109738), GABRR2 (ENSG00000111886), GABRG2 (ENSG00000113327), CHRNB4 (ENSG00000117971), CHRNA2 (ENSG00000120903), CHRNA10 (ENSG00000129749), CHRND (ENSG00000135902), CHRNA1 (ENSG00000138435), GLRA3 (ENSG00000145451), GABRA6 (ENSG00000145863), GABRB2 (ENSG00000145864), GLRA1 (ENSG00000145888), GABRR1 (ENSG00000146276), CHRNB3 (ENSG00000147432), CHRNA6 (ENSG00000147434), HTR3B (ENSG00000149305), GABRA2 (ENSG00000151834), GABRG1 (ENSG00000163285), GABRB1 (ENSG00000163288), GABRB3 (ENSG00000166206), CHRFAM7A (ENSG00000166664), HTR3A (ENSG00000166736), CHRNA5 (ENSG00000169684), CHRNB1 (ENSG00000170175), CHRNA9 (ENSG00000174343), CHRNA7 (ENSG00000175344), HTR3C (ENSG00000178084), GABRG3 (ENSG00000182256), GABRR3 (ENSG00000183185), HTR3E (ENSG00000186038), HTR3D (ENSG00000186090)
Protein
Protein identifiers
Neuronal acetylcholine receptor subunit beta-2 — P17787 (reviewed: P17787)
All UniProt accessions (4): P17787, A0A1B0GTH5, A0A1B0GVD7, Q5SXY3
UniProt curated annotations — full annotation on UniProt →
Function. Component of neuronal acetylcholine receptors (nAChRs) that function as pentameric, ligand-gated cation channels with high calcium permeability among other activities. nAChRs are excitatory neurotrasnmitter receptors formed by a collection of nAChR subunits known to mediate synaptic transmission in the nervous system and the neuromuscular junction. Each nAchR subunit confers differential attributes to channel properties, including activation, deactivation and desensitization kinetics, pH sensitivity, cation permeability, and binding to allosteric modulators. CHRNB2 forms heteropentameric neuronal acetylcholine receptors with CHRNA2, CHRNA3, CHRNA4 and CHRNA6, as well as CHRNA5 and CHRNB3 as accesory subunits. Found in two major stoichiometric forms,(CHRNA4)3:(CHRNB2)2 and (CHRNA4)2:(CHRNB2)3, the two stoichiometric forms differ in their unitary conductance, calcium permeability, ACh sensitivity and potentiation by divalent cation. Heteropentameric channels with CHRNA6 and CHRNA4 exhibit high sensitivity to ACh and nicotine and are predominantly expressed in only a few brain areas, including dopaminergic neurons, norepirephrine neurons and cells of the visual system. nAChrs containing CHRNA6 subunits mediate endogenous cholinergic modulation of dopamine and gamma-aminobutyric acid (GABA) release in response to nicotine at nerve terminals. Also forms functional nAChRs with other subunits such as CHRNA7:CHRNB2, mainly expressed in basal forebrain cholinergic neurons.
Subunit / interactions. Neuronal AChR is a heteropentamer composed of two different types of subunits: alpha and beta. CHRNB2/Beta-2 subunit can be combined to CHRNA2/alpha-2, CHRNA3/alpha-3 or CHRNA4/alpha-4, CHRNA5/alpha-5, CHRNA6/alpha-6 and CHRNB3/beta-3 to give rise to functional receptors. CHRNA2:CHRNB2 and CHRNA4:CHRNB2 nAChR complexes exist in two subtypes: LS (low agonist sensitivity) with a (CHRNA2/4)3:(CHRNB2)2 and HS (high agonist sensitivity) with a (CHRNA2/4)2:(CHRNB2)3 stoichiometry; the subtypes differ in their subunit binding interfaces which are involved in ligand binding. Cells produce predominantly an (CHRNA4)3:(CHRNB2)2 nAChR. The stoichiometric form (CHRNA4)2:(CHRNB2)3 expression is selectively up-regulated by nicotine and has lower single channel conductance and calcium permeability. Also part of the stoichiometric forms: (CHRNA4:CHRNB2)2:CHRNB3 or (CHRNA6:CHRNB2)2:CHRNB3. Can form heteropentamers with CHRNA7, mainly found in basal forebrain cholinergic neurons. Interacts with RIC3; which is required for proper folding and assembly. Interacts with LYPD6.
Subcellular location. Synaptic cell membrane. Cell membrane.
Disease relevance. Epilepsy, nocturnal frontal lobe, 3 (ENFL3) [MIM:605375] An autosomal dominant focal epilepsy characterized by nocturnal seizures with hyperkinetic automatisms and poorly organized stereotyped movements. The disease is caused by variants affecting the gene represented in this entry.
Activity regulation. Activated by a myriad of ligands such as acetylcholine, cytisine, nicotine, choline and epibatidine. Channel potentiation by calcium is stoichiometry-selective, CHRNA4:CHRNB2 nACh receptor is achieved by calcium association with topographically distinct sites framed by anionic residues within the CHRNA4 subunit and between the CHRNA4 and CHRNB2 subunits. Oligomeric amyloid-beta protein 42 activates specifially CHRNA7:CHRNB2 nAchRs. nAChR activity is inhibited by the antagonist alpha-conotoxins BuIA, PnIA, PnIC, GID and MII, small disulfide-constrained peptides from cone snails.
Similarity. Belongs to the ligand-gated ion channel (TC 1.A.9) family. Acetylcholine receptor (TC 1.A.9.1) subfamily. Beta-2/CHRNB2 sub-subfamily.
RefSeq proteins (1): NP_000739* (*=MANE)
Domains & families (InterPro)
| ID | Name | Type |
|---|---|---|
| IPR002394 | Nicotinic_acetylcholine_rcpt | Family |
| IPR006029 | Neurotrans-gated_channel_TM | Domain |
| IPR006201 | Neur_channel | Family |
| IPR006202 | Neur_chan_lig-bd | Domain |
| IPR018000 | Neurotransmitter_ion_chnl_CS | Conserved_site |
| IPR036719 | Neuro-gated_channel_TM_sf | Homologous_superfamily |
| IPR036734 | Neur_chan_lig-bd_sf | Homologous_superfamily |
| IPR038050 | Neuro_actylchol_rec | Homologous_superfamily |
Pfam: PF02931, PF02932
Catalyzed reactions (Rhea), 3 shown:
- K(+)(in) = K(+)(out) (RHEA:29463)
- Ca(2+)(in) = Ca(2+)(out) (RHEA:29671)
- Na(+)(in) = Na(+)(out) (RHEA:34963)
UniProt features (65 total): helix 14, strand 14, mutagenesis site 7, turn 7, topological domain 4, transmembrane region 4, site 3, glycosylation site 3, sequence variant 3, sequence conflict 3, signal peptide 1, chain 1, disulfide bond 1
Structure
Experimental structures (PDB)
15 structures.
| PDB | Method | Resolution (Å) |
|---|---|---|
| 8ST4 | ELECTRON MICROSCOPY | 2.35 |
| 8ST0 | ELECTRON MICROSCOPY | 2.4 |
| 8SSZ | ELECTRON MICROSCOPY | 2.64 |
| 8ST3 | ELECTRON MICROSCOPY | 2.93 |
| 8ST2 | ELECTRON MICROSCOPY | 2.94 |
| 8ST1 | ELECTRON MICROSCOPY | 3.41 |
| 6CNJ | ELECTRON MICROSCOPY | 3.7 |
| 6UR8 | ELECTRON MICROSCOPY | 3.71 |
| 6USF | ELECTRON MICROSCOPY | 3.87 |
| 6CNK | ELECTRON MICROSCOPY | 3.9 |
| 5KXI | X-RAY DIFFRACTION | 3.94 |
| 2K58 | SOLUTION NMR | |
| 2K59 | SOLUTION NMR | |
| 2KSR | SOLUTION NMR | |
| 2LM2 | SOLUTION NMR |
Predicted structure (AlphaFold)
| Model | pLDDT | Fraction very-high |
|---|---|---|
| AF-P17787-F1 | 81.16 | 0.51 |
Antibody-complex structures (SAbDab): 9 — 6CNJ, 6CNK, 6USF, 8SSZ, 8ST0, 8ST1, 8ST2, 8ST3, 8ST4
Functional residue map
Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.
Catalytic / active sites (3): 84 (key residue that may interfere with effective access of the conotoxin buia to the channel binding site); 136 (key residue for a rapid dissociation (k(off)) from the conotoxin buia); 144 (key residue for a rapid dissociation (k(off)) from the conotoxin buia)
Disulfide bonds (1): 155–169
Glycosylation sites (3): 51, 168, 485
Mutagenesis-validated functional residues (7):
| Position | Phenotype |
|---|---|
| 72 | reduces chrna4:chrnb2 channel opening potentiation by divalent cations. |
| 74 | reduces chrna4:chrnb2 channel opening potentiation by divalent cations. |
| 196 | loss of chrna4:chrnb2 channel opening potentiation by divalent cations. |
| 197 | increases ligand activation in ls and hs nachr subtypes. |
| 202 | reduces chrna4:chrnb2 channel opening potentiation by divalent cations. |
| 218 | reduces chrna4:chrnb2 channel opening potentiation by divalent cations. |
| 285 | increases ca(2+) permeability. |
Function
Pathways and Gene Ontology
Reactome pathways
9 pathways
| ID | Pathway |
|---|---|
| R-HSA-629587 | Highly sodium permeable postsynaptic acetylcholine nicotinic receptors |
| R-HSA-629594 | Highly calcium permeable postsynaptic nicotinic acetylcholine receptors |
| R-HSA-629597 | Highly calcium permeable nicotinic acetylcholine receptors |
| R-HSA-112314 | Neurotransmitter receptors and postsynaptic signal transmission |
| R-HSA-112315 | Transmission across Chemical Synapses |
| R-HSA-112316 | Neuronal System |
| R-HSA-181431 | Acetylcholine binding and downstream events |
| R-HSA-622323 | Presynaptic nicotinic acetylcholine receptors |
| R-HSA-622327 | Postsynaptic nicotinic acetylcholine receptors |
MSigDB gene sets: 325 (showing top):
GSE45365_CD8A_DC_VS_CD11B_DC_IFNAR_KO_MCMV_INFECTION_DN, GOBP_CIRCADIAN_RHYTHM, GOBP_DENDRITE_DEVELOPMENT, GOBP_MEMORY, GOBP_REGULATION_OF_CELL_ACTIVATION, RNGTGGGC_UNKNOWN, GOBP_PHENOL_CONTAINING_COMPOUND_METABOLIC_PROCESS, GOBP_EXCRETION, GOBP_MEMBRANE_DEPOLARIZATION, GOBP_RESPONSE_TO_NITROGEN_COMPOUND, GOBP_REGULATION_OF_LEUKOCYTE_PROLIFERATION, GOBP_RESPONSE_TO_ETHANOL, GOBP_COGNITION, MODULE_274, GOBP_BEHAVIOR
GO Biological Process (43): response to hypoxia (GO:0001666), monoatomic ion transport (GO:0006811), calcium ion transport (GO:0006816), smooth muscle contraction (GO:0006939), signal transduction (GO:0007165), chemical synaptic transmission (GO:0007268), synaptic transmission, cholinergic (GO:0007271), visual perception (GO:0007601), sensory perception of sound (GO:0007605), learning (GO:0007612), memory (GO:0007613), locomotory behavior (GO:0007626), associative learning (GO:0008306), visual learning (GO:0008542), regulation of dopamine secretion (GO:0014059), sensory perception of pain (GO:0019233), vestibulocochlear nerve development (GO:0021562), optic nerve morphogenesis (GO:0021631), lateral geniculate nucleus development (GO:0021771), central nervous system projection neuron axonogenesis (GO:0021952), positive regulation of B cell proliferation (GO:0030890), regulation of synaptic transmission, dopaminergic (GO:0032225), positive regulation of dopamine secretion (GO:0033603), monoatomic ion transmembrane transport (GO:0034220), response to nicotine (GO:0035094), behavioral response to nicotine (GO:0035095), social behavior (GO:0035176), regulation of dopamine metabolic process (GO:0042053), B cell activation (GO:0042113), response to cocaine (GO:0042220), regulation of circadian sleep/wake cycle, REM sleep (GO:0042320), response to ethanol (GO:0045471), negative regulation of action potential (GO:0045759), regulation of dendrite morphogenesis (GO:0048814), nervous system process (GO:0050877), cognition (GO:0050890), membrane depolarization (GO:0051899), regulation of synapse assembly (GO:0051963), synaptic transmission involved in micturition (GO:0060084), acetylcholine receptor signaling pathway (GO:0095500)
GO Molecular Function (8): ligand-gated monoatomic ion channel activity (GO:0015276), acetylcholine receptor activity (GO:0015464), acetylcholine-gated monoatomic cation-selective channel activity (GO:0022848), acetylcholine binding (GO:0042166), transmembrane signaling receptor activity (GO:0004888), monoatomic ion channel activity (GO:0005216), extracellular ligand-gated monoatomic ion channel activity (GO:0005230), protein binding (GO:0005515)
GO Cellular Component (11): plasma membrane (GO:0005886), acetylcholine-gated channel complex (GO:0005892), external side of plasma membrane (GO:0009897), membrane (GO:0016020), neuron projection (GO:0043005), plasma membrane raft (GO:0044853), synapse (GO:0045202), postsynaptic membrane (GO:0045211), neurotransmitter receptor complex (GO:0098878), cation channel complex (GO:0034703), synaptic membrane (GO:0097060)
Reactome top-level categories
Rollup of top-6 pathways:
| Category | Pathways |
|---|---|
| Presynaptic nicotinic acetylcholine receptors | 2 |
| Postsynaptic nicotinic acetylcholine receptors | 2 |
| Acetylcholine binding and downstream events | 2 |
| Transmission across Chemical Synapses | 1 |
| Neuronal System | 1 |
| Neurotransmitter receptors and postsynaptic signal transmission | 1 |
GO top-level categories
Rollup of top GO terms by namespace:
| Category | Terms |
|---|---|
| learning or memory | 2 |
| postsynaptic neurotransmitter receptor activity | 2 |
| monoatomic ion channel complex | 2 |
| plasma membrane signaling receptor complex | 2 |
| plasma membrane | 2 |
| plasma membrane region | 2 |
| response to stress | 1 |
| response to decreased oxygen levels | 1 |
| transport | 1 |
| metal ion transport | 1 |
| muscle contraction | 1 |
| cell communication | 1 |
| cellular process | 1 |
| signaling | 1 |
| regulation of cellular process | 1 |
| cellular response to stimulus | 1 |
| anterograde trans-synaptic signaling | 1 |
| chemical synaptic transmission | 1 |
| sensory perception of light stimulus | 1 |
| sensory perception of mechanical stimulus | 1 |
| behavior | 1 |
| learning | 1 |
| visual behavior | 1 |
| associative learning | 1 |
| dopamine secretion | 1 |
| regulation of catecholamine secretion | 1 |
| sensory perception | 1 |
| cranial nerve development | 1 |
| optic nerve development | 1 |
| cranial nerve morphogenesis | 1 |
| thalamus development | 1 |
| neural nucleus development | 1 |
| central nervous system neuron axonogenesis | 1 |
| monoatomic ion channel activity | 1 |
| ligand-gated channel activity | 1 |
| transmembrane signaling receptor activity | 1 |
| synaptic transmission, cholinergic | 1 |
| acetylcholine binding | 1 |
| excitatory extracellular ligand-gated monoatomic ion channel activity | 1 |
| ligand-gated monoatomic cation channel activity | 1 |
Protein interactions and networks
STRING
1424 interactions, top by confidence (×1000):
| Protein A | Protein B | Partner UniProt | Score |
|---|---|---|---|
| CHRNB2 | CHRM2 | P08172 | 710 |
| CHRNB2 | CHRNA4 | P43681 | 683 |
| CHRNB2 | IGBP1 | P78318 | 677 |
| CHRNB2 | KCNT1 | Q5JUK3 | 669 |
| CHRNB2 | GABBR2 | O75899 | 662 |
| CHRNB2 | CHRM5 | P08912 | 660 |
| CHRNB2 | SLC17A6 | Q9P2U8 | 650 |
| CHRNB2 | DRD2 | P14416 | 618 |
| CHRNB2 | GRIN2A | Q12879 | 601 |
| CHRNB2 | SLC6A3 | Q01959 | 599 |
| CHRNB2 | GRIN2B | Q13224 | 591 |
| CHRNB2 | DEPDC5 | O75140 | 585 |
| CHRNB2 | PURA | Q00577 | 575 |
| CHRNB2 | DRD1 | P21728 | 572 |
| CHRNB2 | ACHE | P22303 | 560 |
IntAct
18 interactions, top by confidence:
| A | B | Type | Score |
|---|---|---|---|
| CHRNB2 | CHRNA5 | psi-mi:“MI:0915”(physical association) | 0.660 |
| CHRNA5 | CHRNB2 | psi-mi:“MI:0914”(association) | 0.660 |
| CHRNB2 | CHRNA5 | psi-mi:“MI:0914”(association) | 0.660 |
| CHRNA4 | CHRNB2 | psi-mi:“MI:0915”(physical association) | 0.490 |
| CHRNB2 | CRELD2 | psi-mi:“MI:0915”(physical association) | 0.440 |
| CRELD2 | CHRNB2 | psi-mi:“MI:0403”(colocalization) | 0.440 |
| CHRNA4 | CHRNB2 | psi-mi:“MI:0915”(physical association) | 0.400 |
| LYPD6 | CHRNB2 | psi-mi:“MI:0914”(association) | 0.350 |
| LYNX1 | CHRNB2 | psi-mi:“MI:0914”(association) | 0.350 |
| CHRNB2 | TMEM131L | psi-mi:“MI:0914”(association) | 0.350 |
| CHRNB2 | SNX2 | psi-mi:“MI:0914”(association) | 0.350 |
| IL5RA | LETM1 | psi-mi:“MI:0914”(association) | 0.350 |
| STRIP2 | OXSR1 | psi-mi:“MI:0914”(association) | 0.350 |
BioGRID (105): CHRNA3 (Affinity Capture-Western), CHRNA4 (Affinity Capture-Western), P2RX2 (Affinity Capture-Western), CHRNB2 (Affinity Capture-Western), CHRNB2 (Affinity Capture-Western), CHRNB2 (Affinity Capture-Western), WNT5A (Affinity Capture-MS), CYB5R1 (Affinity Capture-MS), EIF2AK3 (Affinity Capture-MS), ASPHD2 (Affinity Capture-MS), B4GALT7 (Affinity Capture-MS), B4GALT1 (Affinity Capture-MS), ST3GAL6 (Affinity Capture-MS), ENTPD6 (Affinity Capture-MS), TTC17 (Affinity Capture-MS)
ESM2 similar proteins: F1R8P4, G5EBR3, O00591, O09028, O14764, O18276, O75311, O93430, P02712, P07727, P09478, P09484, P12389, P12390, P12392, P17644, P17787, P18506, P20781, P22771, P22933, P23414, P23415, P23416, P24524, P30926, P32297, P48167, P48168, P57695, P91730, P91766, Q09453, Q15822, Q17328, Q21005, Q5EA06, Q61603, Q64018, Q75NA5
Diamond homologs: A8WQK3, O16926, O70174, P02708, P02709, P02710, P02711, P02712, P02713, P02716, P02717, P04755, P04756, P04757, P04758, P04759, P05377, P09478, P09479, P09480, P09481, P09482, P09483, P09484, P09628, P09690, P11230, P12389, P12390, P12391, P12392, P13908, P17644, P17787, P18257, P18845, P19370, P20420, P22456, P22770
SIGNOR signaling
5 interactions.
| A | Effect | B | Mechanism |
|---|---|---|---|
| CHRNB2 | “form complex” | “Neuronal nicotinic acetylcholine receptor complex, 3xalpha4-2xbeta2” | binding |
| CHRNB2 | “form complex” | “Neuronal nicotinic acetylcholine receptor complex, alpha3-alpha5-beta2” | binding |
| CHRNB2 | “form complex” | “Neuronal nicotinic acetylcholine receptor complex, alpha4-alpha5-beta2” | binding |
| CHRNB2 | “form complex” | “Neuronal nicotinic acetylcholine receptor complex, alpha7-beta2” | binding |
| CHRNB2 | “form complex” | “Neuronal nicotinic acetylcholine receptor complex, alpha3-alpha6-beta2-beta3” | binding |
Disease & clinical
Clinical variants and AI predictions
ClinVar
687 variants total. Per-class counts are floors (≥ shown; pagination cap):
| Classification | Count (floor) |
|---|---|
| Pathogenic | 2 |
| Likely pathogenic | 3 |
| Uncertain significance | 372 |
| Likely benign | 242 |
| Benign | 18 |
Top pathogenic / likely-pathogenic (5)
| Variant ID | HGVS | Classification |
|---|---|---|
| 17495 | NM_000748.3(CHRNB2):c.859G>C (p.Val287Leu) | Pathogenic |
| 17496 | NM_000748.3(CHRNB2):c.859G>A (p.Val287Met) | Pathogenic |
| 1030889 | NM_000748.3(CHRNB2):c.845T>A (p.Leu282His) | Likely pathogenic |
| 3061958 | NM_000748.3(CHRNB2):c.256-1G>A | Likely pathogenic |
| 3391473 | NM_000748.3(CHRNB2):c.1010T>G (p.Val337Gly) | Likely pathogenic |
SpliceAI
996 predictions. Top by Δscore:
| Variant | Effect | Δscore |
|---|---|---|
| 1:154568106:CAGGT:C | donor_loss | 1.0000 |
| 1:154568107:AGGTA:A | donor_loss | 1.0000 |
| 1:154568109:G:GA | donor_loss | 1.0000 |
| 1:154568110:T:G | donor_loss | 1.0000 |
| 1:154569455:T:A | acceptor_gain | 1.0000 |
| 1:154569458:CCA:C | acceptor_loss | 1.0000 |
| 1:154569459:CA:C | acceptor_loss | 1.0000 |
| 1:154569460:A:AG | acceptor_gain | 1.0000 |
| 1:154569460:AG:A | acceptor_gain | 1.0000 |
| 1:154569460:AGG:A | acceptor_gain | 1.0000 |
| 1:154569460:AGGG:A | acceptor_gain | 1.0000 |
| 1:154569461:G:A | acceptor_gain | 1.0000 |
| 1:154569461:G:GA | acceptor_gain | 1.0000 |
| 1:154569461:GGG:G | acceptor_gain | 1.0000 |
| 1:154569461:GGGG:G | acceptor_gain | 1.0000 |
| 1:154569461:GGGGT:G | acceptor_gain | 1.0000 |
| 1:154569565:GAC:G | donor_gain | 1.0000 |
| 1:154569566:ACA:A | donor_gain | 1.0000 |
| 1:154569603:GTGTG:G | donor_gain | 1.0000 |
| 1:154569605:GTG:G | donor_gain | 1.0000 |
| 1:154569606:TG:T | donor_gain | 1.0000 |
| 1:154569607:GG:G | donor_gain | 1.0000 |
| 1:154569608:G:GC | donor_loss | 1.0000 |
| 1:154569608:G:GG | donor_gain | 1.0000 |
| 1:154570249:A:AG | acceptor_gain | 1.0000 |
| 1:154570250:T:G | acceptor_gain | 1.0000 |
| 1:154570254:CCAG:C | acceptor_loss | 1.0000 |
| 1:154570255:CAG:C | acceptor_loss | 1.0000 |
| 1:154570256:A:AG | acceptor_gain | 1.0000 |
| 1:154570256:AG:A | acceptor_gain | 1.0000 |
AlphaMissense
3287 scored. Top likely-pathogenic:
| Variant | Protein change | am_pathogenicity |
|---|---|---|
| 1:154569540:C:A | P48Q | 1.000 |
| 1:154569825:T:A | W82R | 1.000 |
| 1:154569825:T:C | W82R | 1.000 |
| 1:154570261:T:A | W87R | 1.000 |
| 1:154570261:T:C | W87R | 1.000 |
| 1:154570263:G:C | W87C | 1.000 |
| 1:154570263:G:T | W87C | 1.000 |
| 1:154570267:G:C | D89H | 1.000 |
| 1:154570274:G:C | R91P | 1.000 |
| 1:154570277:T:C | L92P | 1.000 |
| 1:154570282:T:A | W94R | 1.000 |
| 1:154570282:T:C | W94R | 1.000 |
| 1:154570284:G:C | W94C | 1.000 |
| 1:154570284:G:T | W94C | 1.000 |
| 1:154570339:T:A | W113R | 1.000 |
| 1:154570339:T:C | W113R | 1.000 |
| 1:154570341:G:C | W113C | 1.000 |
| 1:154570341:G:T | W113C | 1.000 |
| 1:154570346:C:A | P115Q | 1.000 |
| 1:154571256:T:A | W145R | 1.000 |
| 1:154571256:T:C | W145R | 1.000 |
| 1:154571280:A:C | S153R | 1.000 |
| 1:154571282:C:A | S153R | 1.000 |
| 1:154571282:C:G | S153R | 1.000 |
| 1:154571286:T:A | C155S | 1.000 |
| 1:154571286:T:C | C155R | 1.000 |
| 1:154571287:G:A | C155Y | 1.000 |
| 1:154571287:G:C | C155S | 1.000 |
| 1:154571288:C:G | C155W | 1.000 |
| 1:154571307:T:C | F162L | 1.000 |
dbSNP variants (sampled 300 via entrez): RS1000867963 (1:154568532 C>T), RS1001642557 (1:154570998 T>A,G), RS1001854931 (1:154575684 G>A,C,T), RS1001916378 (1:154576724 C>G), RS1001976248 (1:154569009 AC>A), RS1002883487 (1:154569393 T>C,G), RS1003043795 (1:154573061 C>T), RS1003490551 (1:154571081 C>T), RS1003550319 (1:154578184 G>A), RS1003915084 (1:154579095 G>C), RS1003950436 (1:154571519 C>A), RS1004366641 (1:154566419 G>A), RS1004807893 (1:154577578 T>C), RS1004901701 (1:154578685 A>G), RS1004998847 (1:154571604 G>A,T)
Disease associations
OMIM: gene MIM:118507 | disease phenotypes: MIM:600513, MIM:605375
GenCC curated gene-disease
| Disease | Classification | Inheritance |
|---|---|---|
| autosomal dominant nocturnal frontal lobe epilepsy 3 | Strong | Autosomal dominant |
| autosomal dominant nocturnal frontal lobe epilepsy | Supportive | Autosomal dominant |
ClinGen Gene-Disease Validity (1)
Expert-panel classifications — Definitive > Strong > Moderate > Limited > Disputed > Refuted.
| Disease | Classification | Inheritance |
|---|---|---|
| familial sleep-related hypermotor epilepsy | Definitive | AD |
Mondo (7): familial sleep-related hypermotor epilepsy (MONDO:0000030), autosomal dominant nocturnal frontal lobe epilepsy 3 (MONDO:0011545), autosomal dominant nocturnal frontal lobe epilepsy 1 (MONDO:0010899), intellectual disability (MONDO:0001071), microcephaly (MONDO:0001149), enophthalmos (MONDO:0001210), (MONDO:0020300)
Orphanet (2): Sleep-related hypermotor epilepsy (Orphanet:98784), NON RARE IN EUROPE: Unexplained intellectual disability (Orphanet:319658)
HPO phenotypes
23 total (25 of 23 shown, HPO-id order):
| HPO | Term |
|---|---|
| HP:0000006 | Autosomal dominant inheritance |
| HP:0000020 | Urinary incontinence |
| HP:0000708 | Atypical behavior |
| HP:0000716 | Depression |
| HP:0000733 | Motor stereotypy |
| HP:0000739 | Anxiety |
| HP:0001250 | Seizure |
| HP:0001256 | Mild intellectual disability |
| HP:0001345 | Psychotic mentation |
| HP:0002069 | Bilateral tonic-clonic seizure |
| HP:0002268 | Paroxysmal dystonia |
| HP:0002883 | Hyperventilation |
| HP:0004305 | Involuntary movements |
| HP:0007018 | Attention deficit hyperactivity disorder |
| HP:0011174 | Focal hyperkinetic seizure |
| HP:0011182 | Interictal epileptiform activity |
| HP:0011193 | EEG with focal spikes |
| HP:0025235 | NREM parasomnia |
| HP:0025236 | Sleep walking |
| HP:0031535 | Increased theta frequency activity in EEG |
| HP:0031589 | Suicidal ideation |
| HP:0031951 | Nocturnal seizures |
| HP:0100543 | Cognitive impairment |
| HP:0000252 | Microcephaly |
| HP:0000490 | Deeply set eye |
GWAS associations
3 associations (top):
| Study | Trait | p-value |
|---|---|---|
| GCST004294_8 | Nicotine dependence | 4.000000e-06 |
| GCST008809_1 | Smoking behaviour (cigarettes smoked per day) | 4.000000e-08 |
| GCST012497_2 | Lung function (FEV1) | 4.000000e-07 |
EFO canonical traits (2, from GWAS)
| EFO ID | Trait name |
|---|---|
| EFO:0006525 | cigarettes per day measurement |
| EFO:0004314 | forced expiratory volume |
MeSH disease descriptors (6)
| Descriptor | Name | Tree numbers |
|---|---|---|
| D015841 | Enophthalmos | C11.675.319 |
| D008607 | Intellectual Disability | C10.597.606.360; C23.888.592.604.646; F01.700.687; F03.625.539 |
| D008831 | Microcephaly | C05.660.207.620; C10.500.507.400.500; C16.131.621.207.620; C16.131.666.507.400.500 |
| C579932 | Autosomal Dominant Nocturnal Frontal Lobe Epilepsy (supp.) | |
| C563930 | Epilepsy, Nocturnal Frontal Lobe, Type 1 (supp.) | |
| C565334 | Epilepsy, Nocturnal Frontal Lobe, Type 3 (supp.) |
Drugs & pharmacology
Drug and pharmacology data
Is drug target: yes
ChEMBL targets (14): CHEMBL1883 (SINGLE PROTEIN), CHEMBL1907589 (PROTEIN COMPLEX), CHEMBL2109233 (PROTEIN COMPLEX), CHEMBL2109234 (PROTEIN COMPLEX), CHEMBL2109236 (PROTEIN COMPLEX), CHEMBL2109237 (PROTEIN COMPLEX), CHEMBL2111384 (PROTEIN COMPLEX GROUP), CHEMBL2221346 (PROTEIN COMPLEX GROUP), CHEMBL3038458 (PROTEIN COMPLEX), CHEMBL3038461 (PROTEIN COMPLEX)
Molecules with ChEMBL bioactivity
26 molecules (phase ≥1), by development phase (incl. off-target/promiscuous compounds). Patent mentions across the top 20 by phase: 450,937 (via chembl_molecule»patent_compound — counts attach to the compound, not the gene–compound relationship, so off-target/promiscuous molecules can dominate).
| Molecule | Name | Phase | Patents |
|---|---|---|---|
| CHEMBL1076903 | VARENICLINE | 4 | 5,807 |
| CHEMBL267936 | MECAMYLAMINE | 4 | 5,623 |
| CHEMBL289469 | GRANISETRON | 4 | 431 |
| CHEMBL3 | NICOTINE | 4 | 184,969 |
| CHEMBL46 | ONDANSETRON | 4 | 41,386 |
| CHEMBL56564 | TROPISETRON | 4 | 19,312 |
| CHEMBL667 | ACETYLCHOLINE | 4 | 124,626 |
| CHEMBL894 | BUPROPION | 4 | 36,982 |
| CHEMBL965 | CARBAMOYLCHOLINE | 4 | 22,580 |
| CHEMBL2103881 | DEXMECAMYLAMINE | 3 | 18 |
| CHEMBL497939 | CYTISINICLINE | 3 | 2,766 |
| CHEMBL111659 | ALTINICLINE | 2 | 129 |
| CHEMBL1172928 | RADAFAXINE | 2 | 1,079 |
| CHEMBL122270 | LOBELINE | 2 | 2,266 |
| CHEMBL1257065 | STILONIUM IODIDE | 2 | 751 |
| CHEMBL1258006 | BRADANICLINE | 2 | 208 |
| CHEMBL127071 | POZANICLINE | 2 | 360 |
| CHEMBL132966 | RIVANICLINE | 2 | 911 |
| CHEMBL134713 | GTS-21 | 2 | 269 |
| CHEMBL188462 | ISPRONICLINE | 2 | 464 |
| CHEMBL2151437 | AZD0328 | 2 | |
| CHEMBL2179529 | AZD1446 | 2 | |
| CHEMBL238465 | SOFINICLINE | 2 | |
| CHEMBL430497 | TEBANICLINE | 2 | |
| CHEMBL504652 | TC-2216 | 1 | |
| CHEMBL6200 | NORNICOTINE | 1 |
PharmGKB: 1 entry (VIP=true, CPIC=false)
PharmGKB clinical annotations
3 annotations.
| Variant | Type | Level | Drugs | Phenotypes |
|---|---|---|---|---|
| rs2072658 | Other | 3 | nicotine | Tobacco Use Disorder |
| rs2072660 | Toxicity | 3 | nicotine | Tobacco Use Disorder |
| rs2072661 | Efficacy,Toxicity | 3 | nicotine | Tobacco Use Disorder |
PharmGKB variants
5 variants.
| Variant | Genes | Level | Score | #Clin annots | Drugs |
|---|---|---|---|---|---|
| rs2072658 | CHRNB2 | 3 | 1.25 | 1 | nicotine |
| rs2072660 | CHRNB2 | 3 | 1.75 | 1 | nicotine |
| rs2072661 | CHRNB2 | 3 | 3.00 | 1 | nicotine |
| rs4292956 | CHRNB2 | 0.00 | 0 | ||
| rs12072348 | CHRNB2 | 0.00 | 0 |
GtoPdb / IUPHAR curated pharmacology
(IUPHAR/BPS Guide to Pharmacology — expert-curated)
Target class: lgic — Nicotinic acetylcholine receptors (nACh)
Binding affinities (BindingDB)
78 measured of 87 human assays (101 total across all organisms); most potent 50 below. Values come from heterogeneous assays and are not directly comparable.
| Ligand | Measure | Value | Patent |
|---|---|---|---|
| (S)-2-(6-Chloro-pyridin-3-yl)-7-aza-bicyclo[2.2.1]heptane | KI | 0.05 nM | |
| syn-7-(6-chloro-pyridin-3-yl)-2-azabicyclo[2.2.1]heptane | KI | 0.0785 nM | |
| 5-[5-(azetidin-2-ylmethoxy)-6-methyl-3-pyridinyl]pent-4-yn-1-ol | KI | 0.087 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| 6-[5-(7-Aza-bicyclo[2.2.1]hept-2-yl)-pyridin-3-yl]-hex-5-yn-1-ol | KI | 0.23 nM | |
| 3-(4-Methyl-isoxazol-5-ylmethyl)-1-aza-bicyclo[2.2.1]heptane | KI | 0.3 nM | |
| CHEMBL4740159 | KI | 0.32 nM | |
| 6-(6-Chloro-pyridin-3-yl)-8-aza-bicyclo[3.2.1]octane | KI | 0.343 nM | |
| VARENICLINE | KI | 0.48 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| 7-(3-methylisoxazol-5-yl)-6-aza-bicyclo[2.2.1]heptane | KI | 0.763 nM | |
| 11-Bromo-1,2,3,4,5,6-hexahydro-1,5-methano-pyrido[1,2-a][1,5]diazocin-8-one | EC50 | 1.1 nM | |
| CHEMBL3329537 | KI | 1.1 nM | |
| CHEMBL4791046 | KI | 1.3 nM | |
| CHEMBL4793576 | KI | 1.6 nM | |
| (1S,4S)-2-(6-fluoro-3-pyridinyl)-2,5-diazabicyclo[2.2.1]-heptane | EC50 | 1.62 nM | |
| CHEMBL2177548 | KI | 1.7 nM | |
| CHEMBL3329538 | KI | 1.7 nM | |
| 4-[[(2-oxo-1-piperidin-3-yl-4-pyridinyl)methylamino]methyl]-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one | KI | 3.5 nM | US-11667638: 4-substitued cytisine analogues |
| CHEMBL2177550 | KI | 4.4 nM | |
| 6-[5-(azetidin-2-ylmethoxy)-6-methyl-3-pyridinyl]hex-5-yn-1-ol | KI | 5.3 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| CHEMBL3329539 | KI | 5.4 nM | |
| CHEMBL3329542 | KI | 7 nM | |
| 6-(6-Chloro-pyridin-3-yl)-8-aza-bicyclo[3.2.1]octan-3-ol | KI | 7.4 nM | |
| 3-(azetidin-2-ylmethoxy)-5-(6-chlorohex-1-ynyl)-2-methylpyridine | KI | 8.6 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| 3-(azetidin-2-ylmethoxy)-5-(6-fluorohex-1-ynyl)-2-methylpyridine | KI | 8.7 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| CHEMBL2178154 | KI | 9.6 nM | |
| CHEMBL2057714 | KI | 10 nM | |
| 3-(azetidin-2-ylmethoxy)-5-(2-cyclopropylethynyl)-2-methylpyridine | KI | 13 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| CHEMBL2177554 | KI | 13 nM | |
| 3-(3-Methyl-isoxazol-5-ylmethylene)-1-aza-bicyclo[2.2.1]heptane | IC50 | 14 nM | |
| 3-[1-(3-Methyl-isoxazol-5-yl)-meth-(Z)-ylidene]-1-aza-bicyclo[2.2.1]heptane | IC50 | 15 nM | |
| 3-(azetidin-2-ylmethoxy)-5-hex-1-ynyl-2-methylpyridine | KI | 16 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| CHEMBL2177525 | KI | 22 nM | |
| CHEMBL3329541 | KI | 22 nM | |
| CHEMBL2177534 | KI | 24 nM | |
| CHEMBL2057712 | KI | 29 nM | |
| 11,11-dimethyl-6-oxo-7-aza-11-azoniatricyclo[7.3.1.0 | EC50 | 41 nM | |
| CHEMBL3329540 | EC50 | 53 nM | |
| 2-(6-chloropyridin-3-yl)-1,2,3,4-tetrahydro-1,4-epiminonaphthalene | KI | 65.2 nM | |
| CHEMBL4798114 | KI | 88 nM | |
| CHEMBL2296158 | IC50 | 90 nM | |
| 2-(6-fluoro-5-phenylpyridin-3-yl)-1,2,3,4-tetrahydro-1,4-epiminonaphthalene | KI | 128 nM | |
| 5-hex-1-ynyl-2-methyl-3-(pyrrolidin-2-ylmethoxy)pyridine | KI | 130 nM | US-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof |
| CHEMBL3329544 | KI | 310 nM | |
| CHEMBL4438684 | KI | 519 nM | |
| CHEMBL3329545 | EC50 | 540 nM | |
| CHEMBL4472617 | KI | 627 nM | |
| 3-[1-(3-Methyl-isoxazol-5-yl)-meth-(E)-ylidene]-1-aza-bicyclo[2.2.2]octane | IC50 | 854 nM | |
| (1R,4R)-2-(5-cyano-3-pyridinyl)-2,5-diazabicyclo[2.2.1]-heptane | EC50 | 980 nM | |
| CHEMBL3329546 | EC50 | 1000 nM | |
| CHEMBL4557590 | KI | 1010 nM |
ChEMBL bioactivities
2055 potent at pChembl≥5 of 2326 total, top 50 by pChembl (potency: 10 = 0.1 nM, 6 = 1 µM).
| pChembl | Type | Value | Unit | Molecule |
|---|---|---|---|---|
| 11.00 | Ki | 0.01 | nM | EPIBATIDINE |
| 11.00 | Kd | 0.01 | nM | EPIBATIDINE |
| 11.00 | Kd | 0.0101 | nM | EPIBATIDINE |
| 10.77 | Ki | 0.017 | nM | CHEMBL2024096 |
| 10.77 | Ki | 0.01698 | nM | CHEMBL2024096 |
| 10.74 | Ki | 0.018 | nM | CHEMBL245243 |
| 10.70 | EC50 | 0.02 | nM | EPIBATIDINE |
| 10.70 | Ki | 0.02 | nM | CHEMBL4168511 |
| 10.68 | Ki | 0.021 | nM | CHEMBL361465 |
| 10.66 | Ki | 0.022 | nM | CHEMBL361465 |
| 10.59 | Ki | 0.026 | nM | (+)-EPIBATIDINE |
| 10.57 | Ki | 0.027 | nM | AZIDOEPIBATIDINE |
| 10.52 | Kd | 0.03 | nM | EPIBATIDINE |
| 10.52 | Kd | 0.03 | nM | (-)-EPIBATIDINE |
| 10.52 | Ki | 0.03 | nM | CHEMBL2164666 |
| 10.51 | Ki | 0.031 | nM | CHEMBL3086984 |
| 10.49 | Ki | 0.032 | nM | CHEMBL3086994 |
| 10.48 | Ki | 0.033 | nM | EPIBATIDINE |
| 10.47 | Ki | 0.034 | nM | TEBANICLINE |
| 10.46 | Ki | 0.035 | nM | EPIBATIDINE |
| 10.44 | EC50 | 0.036 | nM | CHEMBL62858 |
| 10.42 | Ki | 0.038 | nM | CHEMBL291498 |
| 10.40 | Ki | 0.04 | nM | CHEMBL59986 |
| 10.40 | Ki | 0.04 | nM | VARENICLINE |
| 10.40 | Ki | 0.04 | nM | CHEMBL63102 |
| 10.37 | Ki | 0.043 | nM | CHEMBL3086985 |
| 10.35 | Ki | 0.045 | nM | (+)-EPIBATIDINE |
| 10.35 | Ki | 0.045 | nM | NICOTINE |
| 10.34 | Ki | 0.046 | nM | CHEMBL3086982 |
| 10.34 | Ki | 0.046 | nM | EPIBATIDINE |
| 10.31 | Ki | 0.049 | nM | CHEMBL3086991 |
| 10.30 | Ki | 0.05 | nM | EPIBATIDINE |
| 10.30 | Ki | 0.05 | nM | CHEMBL3086995 |
| 10.30 | EC50 | 0.05 | nM | CHEMBL305106 |
| 10.30 | Ki | 0.05 | nM | CHEMBL59986 |
| 10.30 | Ki | 0.05 | nM | CHEMBL54902 |
| 10.28 | Ki | 0.052 | nM | CHEMBL59986 |
| 10.26 | Ki | 0.055 | nM | TEBANICLINE |
| 10.25 | Ki | 0.0558 | nM | EPIBATIDINE |
| 10.22 | EC50 | 0.06 | nM | VARENICLINE |
| 10.22 | Ki | 0.06 | nM | VARENICLINE |
| 10.22 | Ki | 0.06 | nM | EPIBATIDINE |
| 10.22 | Ki | 0.06 | nM | CHEMBL5412811 |
| 10.21 | Ki | 0.062 | nM | CHEMBL2024096 |
| 10.15 | Ki | 0.07 | nM | EPIBATIDINE |
| 10.14 | Ki | 0.072 | nM | CHEMBL3086993 |
| 10.14 | Ki | 0.073 | nM | CHEMBL185061 |
| 10.12 | Ki | 0.076 | nM | CHEMBL3086986 |
| 10.11 | Ki | 0.0785 | nM | CHEMBL220476 |
| 10.11 | Ki | 0.077 | nM | CHEMBL5404069 |
PubChem BioAssay actives
1865 with measured affinity, of 4461 total; 50 most potent distinct compounds. Largely complementary to BindingDB; screening values are coarse (µM, 4 dp), so sub-nM hits tie at the floor.
| Compound | Assay | Type | Value | Unit |
|---|---|---|---|---|
| 2-(6-chloro-3-pyridinyl)-7-methyl-7-azabicyclo[2.2.1]heptane | 304128: Displacement of [3H]epibatidine from alpha-4-beta-2 nAChR | ki | <0.0001 | uM |
| 2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane | 1410535: Displacement of [3H]epibatidine from alpha4beta2 nAChR (unknown origin) expressed in HEK cell membranes after 4 hrs by liquid scintillation counting method | ki | <0.0001 | uM |
| (1R,4R)-2-pyridin-3-yl-2,5-diazabicyclo[2.2.1]heptane | 1359521: Agonist activity at alpha4beta2 nAChR (unknown origin) | ki | <0.0001 | uM |
| (1S,2S,4R)-2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane | 1252856: Binding affinity to alpha4beta2 nAChR (unknown origin) | ki | <0.0001 | uM |
| 5-[[(2R)-azetidin-2-yl]methoxy]-2-chloropyridine | 146301: Compound was evaluated for its ability to displace [3H]cytisine from K177 cells expressing human Nicotinic acetylcholine receptor alpha4-beta2 | ki | <0.0001 | uM |
| 2-(5-azido-6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane | 146309: Binding affinity to alpha4 beta-2 receptor subtype from mouse fibroblast M10 cells was measured using [3 H]nicotine | ki | <0.0001 | uM |
| 2-(6-chloro-3-pyridinyl)-9-azabicyclo[4.2.1]non-2-ene | 640183: Displacement of [3H]epibatidine from nAChR alpha4beta2 receptor | ki | <0.0001 | uM |
| Varenicline | 1647833: Displacement of [3H]cytisine from human alpha4beta2 nAChR expressed in CHOK1 cell membrane by microbeta scintillation counting method | ki | <0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]pyridine | 146301: Compound was evaluated for its ability to displace [3H]cytisine from K177 cells expressing human Nicotinic acetylcholine receptor alpha4-beta2 | ki | <0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-(2-phenylethynyl)pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | <0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-fluorophenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | <0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-fluoro-5-methylphenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | <0.0001 | uM |
| 3-[2-[5-[[(2S)-azetidin-2-yl]methoxy]-3-pyridinyl]ethynyl]-5-fluoro-N,N-dimethylaniline | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | <0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-methylphenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | <0.0001 | uM |
| (1R,2R,4S)-2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane | 1275134: Binding affinity to alpha4beta2 nACh receptor (unknown origin) expressed in Xenopus oocytes | kd | <0.0001 | uM |
| Nicotine | 1359521: Agonist activity at alpha4beta2 nAChR (unknown origin) | ki | <0.0001 | uM |
| 5-iodo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one | 246575: Change in membrane potential in K-177 cells expressing acetylcholine central neuronal receptor alpha4-beta2 subunits | ec50 | <0.0001 | uM |
| 2-(6-chloro-3-pyridinyl)-2,5-diazabicyclo[2.2.1]heptane | 1359521: Agonist activity at alpha4beta2 nAChR (unknown origin) | ki | <0.0001 | uM |
| 1-decyl-3-[(2S)-1-methylpyrrolidin-2-yl]pyridin-1-ium iodide | 1243907: Binding affinity to alpha4beta2 nAChR (unknown origin) | ki | 0.0001 | uM |
| 6-methyl-5,7,13-triazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),5,9-tetraene | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0001 | uM |
| 1-dodecyl-3-[(2S)-1-methylpyrrolidin-2-yl]pyridin-1-ium iodide | 1243907: Binding affinity to alpha4beta2 nAChR (unknown origin) | ki | 0.0001 | uM |
| 6-[5-[[(2S)-azetidin-2-yl]methoxy]-3-pyridinyl]hex-5-yn-1-ol | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| (1S,2S,5R)-2-(pyridin-3-yloxymethyl)-3-azabicyclo[3.1.0]hexane;hydrochloride | 1647833: Displacement of [3H]cytisine from human alpha4beta2 nAChR expressed in CHOK1 cell membrane by microbeta scintillation counting method | ki | 0.0001 | uM |
| (1S,4S)-2-pyridin-3-yl-2,5-diazabicyclo[2.2.1]heptane | 1359521: Agonist activity at alpha4beta2 nAChR (unknown origin) | ki | 0.0001 | uM |
| 2-chloro-5-[(3S)-3-methyl(511C)pentyl]-3-[(E)-2-pyridin-4-ylethenyl]pyridine | 1988843: Binding affinity to nACh alpha6beta2 receptor (unknown origin) assessed as inhibition constant | ki | 0.0001 | uM |
| 6-[5-(2-(18F)fluoro-3-pyridinyl)-3-pyridinyl]-8-methyl-8-azabicyclo[3.2.1]octane | 1988843: Binding affinity to nACh alpha6beta2 receptor (unknown origin) assessed as inhibition constant | ki | 0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-phenylpyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| (4S)-2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane | 146639: Binding affinity towards nicotinic acetylcholine receptor alpha4-beta2 | ki | 0.0001 | uM |
| 6-(6-chloro-3-pyridinyl)-8-azabicyclo[3.2.1]octane | 276249: Displacement of [3H]epibatidine from human recombinant alpha4beta2 nAChR in HEK293 cells by SPA assay | ki | 0.0001 | uM |
| 7-(6-chloro-3-pyridinyl)-2-azabicyclo[2.2.1]heptane | 276249: Displacement of [3H]epibatidine from human recombinant alpha4beta2 nAChR in HEK293 cells by SPA assay | ki | 0.0001 | uM |
| (1R,5S)-7-pyridin-3-yl-3-azabicyclo[3.3.1]non-6-ene | 705817: Displacement of [3H]nicotine from human alpha4beta2 nAChR expressed in human SH-EP1 cells | ki | 0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-fluoro-5-methoxyphenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-chlorophenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(4-fluorophenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3,5-difluorophenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| 3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(2-fluorophenyl)ethynyl]pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| 3-[[(2R)-azetidin-2-yl]methoxy]-5-(2-phenylethynyl)pyridine | 1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assay | ki | 0.0001 | uM |
| 6-methyl-5-oxa-7,13-diazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),6,9-tetraene | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0001 | uM |
| 7-methyl-5-oxa-6,13-diazatetracyclo[9.3.1.02,10.04,8]pentadeca-2(10),3,6,8-tetraene | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0001 | uM |
| 5-bromo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one | 246575: Change in membrane potential in K-177 cells expressing acetylcholine central neuronal receptor alpha4-beta2 subunits | ec50 | 0.0001 | uM |
| 5-chloro-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one | 246575: Change in membrane potential in K-177 cells expressing acetylcholine central neuronal receptor alpha4-beta2 subunits | ec50 | 0.0001 | uM |
| 4,5-dichloro-10-azatricyclo[6.3.1.02,7]dodeca-2,4,6-triene | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0001 | uM |
| 6-methyl-5-thia-7,13-diazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),6,9-tetraene | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0001 | uM |
| 5,7,13-triazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),5,9-tetraene | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0001 | uM |
| 3-pyridin-3-yl-3,7-diazabicyclo[3.3.1]nonane | 705817: Displacement of [3H]nicotine from human alpha4beta2 nAChR expressed in human SH-EP1 cells | ki | 0.0001 | uM |
| 7-phenyl-5,7,13-triazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),5,9-tetraene | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0001 | uM |
| 1-(10-azatricyclo[6.3.1.02,7]dodeca-2(7),3,5-trien-4-yl)ethanone | 254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotine | ki | 0.0002 | uM |
| 5-(6-chloro-3-pyridinyl)-2-azabicyclo[2.2.1]heptane | 276249: Displacement of [3H]epibatidine from human recombinant alpha4beta2 nAChR in HEK293 cells by SPA assay | ki | 0.0002 | uM |
| cytisinicline | 239394: Binding affinity against nicotinic acetylcholine receptor alpha4-beta2 in human HEK293 cells using [3H]- nicotine as radioligand | ki | 0.0002 | uM |
| (1R,3S,5R)-3-[(5-chloro-3-pyridinyl)oxymethyl]-2-azabicyclo[3.1.0]hexane;hydrochloride | 1647833: Displacement of [3H]cytisine from human alpha4beta2 nAChR expressed in CHOK1 cell membrane by microbeta scintillation counting method | ki | 0.0002 | uM |
CTD chemical–gene interactions
85 total (human), top 30 by PubMed support.
| Chemical | Actions (top 5) | PubMed papers |
|---|---|---|
| Acetylcholine | affects binding, affects reaction, decreases reaction, increases reaction, decreases activity (+3 more) | 15 |
| Nicotine | increases phosphorylation, increases activity, increases expression, affects binding, increases response to substance (+2 more) | 6 |
| Varenicline | affects binding, increases activity | 4 |
| Mecamylamine | affects binding, decreases activity, decreases reaction, increases activity, decreases uptake | 4 |
| cytisine | increases activity, decreases reaction, affects binding | 3 |
| Dihydro-beta-Erythroidine | affects binding, decreases activity, decreases reaction, increases activity, decreases uptake | 3 |
| Tubocurarine | affects activity, affects binding, decreases reaction, increases activity, increases reaction (+1 more) | 3 |
| tetrabromobisphenol A | affects binding, decreases reaction, increases activity, affects cotreatment | 2 |
| imidacloprid | increases activity, affects binding, decreases reaction | 2 |
| epibatidine | affects binding, decreases reaction, increases activity | 2 |
| Estradiol | affects binding, affects cotreatment, increases activity, increases expression | 2 |
| Ethinyl Estradiol | affects binding, affects cotreatment, increases activity, affects activity, increases reaction (+1 more) | 2 |
| Flame Retardants | affects binding, decreases reaction, increases activity, affects cotreatment | 2 |
| Lobeline | affects binding, decreases activity, decreases reaction, increases phosphorylation | 2 |
| Pancuronium | decreases activity, affects binding, decreases reaction, increases activity | 2 |
| Physostigmine | affects binding, decreases activity, decreases reaction, affects activity, increases reaction | 2 |
| Vecuronium Bromide | affects binding, decreases reaction, increases activity, decreases activity | 2 |
| Cyclosporine | increases methylation, decreases expression | 2 |
| triptolide | affects binding, decreases reaction, increases activity | 1 |
| triphenyl phosphate | decreases reaction, increases activity, affects cotreatment | 1 |
| bisphenol A | affects binding, decreases reaction, affects activity | 1 |
| subecholine | decreases activity, increases activity, affects binding, decreases reaction | 1 |
| decabromobiphenyl ether | affects cotreatment, decreases reaction, increases activity | 1 |
| decamethonium | decreases activity, decreases reaction, affects binding | 1 |
| 2,4,2’,4’-tetrachlorobiphenyl | affects binding, decreases reaction, increases activity, affects cotreatment | 1 |
| antimony trioxide | affects cotreatment, decreases reaction, increases activity | 1 |
| 4-nonylphenol | affects activity, affects binding, decreases reaction | 1 |
| celastrol | affects binding, decreases reaction, increases activity | 1 |
| methyllycaconitine | decreases reaction, affects binding, decreases activity | 1 |
| 4-octylphenol | affects binding, decreases reaction, affects activity | 1 |
ChEMBL screening assays
696 unique, capped per target: 567 binding, 127 functional, 1 toxicity, 1 admet
Representative assays (with source publication via chembl_document):
| Assay ID | Type | Description | Source paper |
|---|---|---|---|
| CHEMBL1669854 | Binding | Binding affinity to beta2 nAChR | Synthesis and structure-analgesic activity relationships of a novel series of monospirocyclopiperazinium salts (MSPZ). — Bioorg Med Chem Lett |
| CHEMBL1022415 | Functional | Agonist activity at human alpha4beta2 nAChR expressed in HEK293 cells assessed as intracellular calcium level by FLIPR assay | Complementary three-dimensional quantitative structure-activity relationship modeling of binding affinity and functional potency: a study on alpha4beta2 nicotinic ligands. — J Med Chem |
| CHEMBL5166939 | Toxicity | Inhibition of human recombinant nAChRalpha4/beta2 incubated for 120 mins by radiometric scintillation counting method | Design of a Potent, Selective, and Brain-Penetrant Inhibitor of Wnt-Deactivating Enzyme Notum by Optimization of a Crystallographic Fragment Hit. — J Med Chem |
Cellosaurus cell lines
7 cell lines: 4 cancer cell line, 3 transformed cell line
First 10 cell lines (id-ordered, not curated):
| Cellosaurus | Name | Category | Sex |
|---|---|---|---|
| CVCL_5I63 | K177 | Transformed cell line | Female |
| CVCL_C7NI | MKN1 CHRNB2 KO-1 | Cancer cell line | Male |
| CVCL_C7NJ | MKN1 CHRNB2 KO-2 | Cancer cell line | Male |
| CVCL_D1KG | PrecisION hnAChR alpha4/alpha6/beta2-HEK | Transformed cell line | Female |
| CVCL_D1KH | PrecisION hnAChR alpha4/beta2-HEK | Transformed cell line | Female |
| CVCL_SJ01 | HAP1 CHRNB2 (-) 1 | Cancer cell line | Male |
| CVCL_SJ02 | HAP1 CHRNB2 (-) 2 | Cancer cell line | Male |
Clinical trials (associated diseases)
213 trials via MONDO — disease-level, not drug-specific.
| Trial | Phase | Status | Title |
|---|---|---|---|
| NCT05657860 | PHASE4 | COMPLETED | Guanfacine Extended Release for the Reduction of Aggression and Self-injurious Behavior Associated With Prader-Willi Syndrome |
| NCT05744479 | PHASE4 | RECRUITING | Metformin for Antipsychotic-induced Weight Gain in Adults With Intellectual Disability |
| NCT06107829 | PHASE4 | WITHDRAWN | Valbenazine Treatment of Tardive Dyskinesia in Adults With Intellectual/Developmental Disabilities |
| NCT06997198 | PHASE4 | NOT_YET_RECRUITING | Deutetrabenazine Treatment for Tardive Dyskinesia in Intellectual/Developmental Disabilities |
| NCT02270736 | PHASE3 | COMPLETED | Clinical Study to Investigate the Efficacy and Safety of NT 201 Compared to Placebo in the Treatment of Chronic Troublesome Drooling Associated With Neurological Disorders and/or Intellectual Disability |
| NCT02304302 | PHASE2 | COMPLETED | Down Syndrome Memantine Follow-up Study |
| NCT03862950 | PHASE2 | COMPLETED | A Trial of Metformin in Individuals With Fragile X Syndrome (Met) |
| NCT04529226 | PHASE2 | UNKNOWN | Study to Compare Clozapine vs Treatment as Usual in People With Intellectual Disability & Treatment-resistant Psychosis |
| NCT04821856 | PHASE2 | COMPLETED | Evaluation of the Effectiveness of Cannabidiol in Treating Severe Behavioural Problems in Children and Adolescents With Intellectual Disability |
| NCT01119144 | PHASE2 | UNKNOWN | Polycaprolactone / Tricalcium Phosphate (PCL/TCP) v Titanium Orbital Implant : Randomised Trial |
| NCT05273320 | PHASE1 | COMPLETED | Clinical Trial of Nabilone for Aggression in Adults With Intellectual and Developmental Disabilities |
| NCT05301361 | PHASE1 | ENROLLING_BY_INVITATION | Sensitivity of the NIH Toolbox to Stimulant Treatment in Intellectual Disabilities |
| NCT06016764 | PHASE1 | COMPLETED | Use of MRI and cTBS for Catatonia in Autism |
| NCT06586827 | PHASE1 | COMPLETED | Impact of Competency-Based Training and Technical Assistance Employment Outcomes of Individuals With ID/DD |
| NCT07531940 | PHASE1 | NOT_YET_RECRUITING | Escalating Doses of Memantine in Down Syndrome (MEDS-123) |
| NCT03479476 | PHASE2/PHASE3 | COMPLETED | A Trial of Metformin in Individuals With Fragile X Syndrome |
| NCT02616796 | PHASE1/PHASE2 | COMPLETED | Effects of Social Gaze Training on Brain and Behavior in Fragile X Syndrome |
| NCT06860672 | EARLY_PHASE1 | RECRUITING | Clinical Trial of the Dual Vector Base Editor for the Treatment of the CHD3-R1025W Mutation |
| NCT00597948 | Not specified | COMPLETED | Healthy Lifestyles for People With Intellectual Disabilities |
| NCT01087320 | Not specified | RECRUITING | Genome Medical Sequencing for Gene Discovery |
| NCT01652963 | Not specified | UNKNOWN | Picture-based Computerised Assessment and Training of Cognitive Behaviour Therapy Skills |
| NCT01695395 | Not specified | COMPLETED | Mental Health Care Provision for Adults With Intellectual Disability and a Mental Disorder |
| NCT01867554 | Not specified | COMPLETED | Research and Characterization of New Genes Involved in Intellectual Disability |
| NCT01915381 | Not specified | COMPLETED | Improving Adherence Healthy Lifestyle With a Smartphone Application Based on Adults With Intellectual Disabilities |
| NCT01988623 | Not specified | COMPLETED | Pivotal Response Treatment for Individuals With Intellectual Disabilities |
| NCT02099773 | Not specified | COMPLETED | Support Staff-client Interactions With Augmentative and Alternative Communication |
| NCT02136849 | Not specified | COMPLETED | Inter-regional Project of the Great Western Exploration Approach for Exome Molecular Causes Severe Intellectual Disability Isolated or Syndromic |
| NCT02225041 | Not specified | COMPLETED | Sedation Strategy and Cognitive Outcome After Critical Illness in Early Childhood |
| NCT02414438 | Not specified | COMPLETED | Establishing the Clinical Utility of First StepDx PLUS and NextStepDx PLUS Study |
| NCT02451761 | Not specified | COMPLETED | Apparently Balanced Chromosomal Translocation/ Next-generation Sequencing/ Intellectual Disability |
| NCT02461420 | Not specified | ACTIVE_NOT_RECRUITING | Mapping the Genotype, Phenotype, and Natural History of Phelan-McDermid Syndrome |
| NCT02461459 | Not specified | ACTIVE_NOT_RECRUITING | Autism Spectrum Disorder (ASD) and Intellectual Disability (ID) Determinants in Tuberous Sclerosis Complex (TSC) |
| NCT02486081 | Not specified | COMPLETED | Development and Application-Smart Football for Movement Evaluation and Training in the Special Education Population |
| NCT02504502 | Not specified | COMPLETED | Enhancing Genomic Laboratory Reports to Enhance Communication and Empower Patients |
| NCT02513277 | Not specified | COMPLETED | Diabetes Screening & Prevention for People With Learning (Intellectual) Disabilities:STOP Diabetes Study |
| NCT02561754 | Not specified | COMPLETED | Weight Management for Adolescents With IDD |
| NCT02591446 | Not specified | COMPLETED | Transcranial Magnetic Stimulation Studies in Autism Spectrum Disorders |
| NCT02714868 | Not specified | COMPLETED | Evaluation of Project TEAM (Teens Making Environmental and Activity Modifications) |
| NCT02721394 | Not specified | UNKNOWN | FCT With Young Children With ID in the UK: A Feasibility Project V.1 |
| NCT02746614 | Not specified | COMPLETED | Psychomotor Therapy Effects in Adaptive Behavior and Motor Proficiency in Intellectual Disability |
Related Atlas pages
- Associated diseases: autosomal dominant nocturnal frontal lobe epilepsy 3, familial sleep-related hypermotor epilepsy
- Disease cohort memberships (association, not causation — diseases whose associated-gene cohort lists this gene; a subset are also under Associated diseases): autosomal dominant nocturnal frontal lobe epilepsy 1, autosomal dominant nocturnal frontal lobe epilepsy 3, enophthalmos, familial sleep-related hypermotor epilepsy, nicotine dependence