CHRNB2

gene
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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

FieldValue
HGNC IDHGNC:1962
Approved symbolCHRNB2
Namecholinergic receptor nicotinic beta 2 subunit
Location1q21.3
Locus typegene with protein product
StatusApproved
Ensembl geneENSG00000160716
Ensembl biotypeprotein_coding
OMIM118507
Entrez1141

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

ExonStartEnd
ENSE00001053945154569462154569607
ENSE00001053946154569792154569836
ENSE00001053947154571189154572161
ENSE00001053948154570258154570367
ENSE00001447217154575762154580013
ENSE00001447218154567778154568108

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 IDTPM avgSamples expressed
55261.2671218
55250.9423146
55240.3770114
55230.02146

Top tissues by expression

248 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
tongue squamous epitheliumUBERON:000691994.34silver quality
cervix squamous epitheliumUBERON:000692292.31silver quality
type B pancreatic cellCL:000016992.16silver quality
olfactory bulbUBERON:000226491.07silver quality
vena cavaUBERON:000408789.75silver quality
lateral nuclear group of thalamusUBERON:000273689.74gold quality
substantia nigra pars reticulataUBERON:000196688.23gold quality
lateral globus pallidusUBERON:000247687.95gold quality
subthalamic nucleusUBERON:000190687.42silver quality
cervix epitheliumUBERON:000480187.41silver quality
pharyngeal mucosaUBERON:000035587.14silver quality
ventral tegmental areaUBERON:000269186.99silver quality
body of tongueUBERON:001187686.90silver quality
substantia nigra pars compactaUBERON:000196586.89gold quality
cardia of stomachUBERON:000116286.88silver quality
periodontal ligamentUBERON:000826686.88gold quality
upper arm skinUBERON:000426386.80silver quality
cortical plateUBERON:000534386.75gold quality
dorsal plus ventral thalamusUBERON:000189786.56gold quality
inferior vagus X ganglionUBERON:000536386.56silver quality
tongueUBERON:000172386.53silver quality
gluteal muscleUBERON:000200086.51silver quality
right frontal lobeUBERON:000281086.45gold quality
pylorusUBERON:000116686.28silver quality
gingival epitheliumUBERON:000194986.25gold quality
buccal mucosa cellCL:000233685.96silver quality
pericardiumUBERON:000240785.86silver quality
ponsUBERON:000098885.47gold quality
prefrontal cortexUBERON:000045185.43gold quality
superior surface of tongueUBERON:000737185.32silver quality

Single-cell (SCXA)

Detected in 1 experiment(s), a significant marker in 0.

ExperimentMarker?Max mean expression
E-ANND-3no2.61

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):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-4533100.0069.482758
HSA-MIR-29A-3P100.0073.111835
HSA-MIR-29B-3P100.0073.181833
HSA-MIR-29C-3P100.0073.151833
HSA-MIR-4476100.0068.182030
HSA-MIR-6876-5P100.0067.682126
HSA-MIR-453499.9966.581907
HSA-MIR-607799.9968.042299
HSA-MIR-150-5P99.9966.691976
HSA-MIR-3667-3P99.9967.171636
HSA-MIR-10401-5P99.9965.79948
HSA-MIR-4650-5P99.9864.69999
HSA-MIR-4725-3P99.9669.532520
HSA-MIR-6780B-5P99.9669.602562
HSA-MIR-426799.9666.532368
HSA-MIR-211099.9666.681930
HSA-MIR-808299.9567.271170
HSA-MIR-1236-3P99.9468.041695
HSA-MIR-497-5P99.9271.832674
HSA-MIR-129799.9173.413162
HSA-MIR-15A-5P99.9072.802787
HSA-MIR-15B-5P99.9072.782798
HSA-MIR-16-5P99.9072.802780
HSA-MIR-195-5P99.9072.812805
HSA-MIR-424-5P99.8971.902641
HSA-MIR-6838-5P99.8971.942690
HSA-MIR-427199.8868.322244
HSA-MIR-7845-5P99.8864.88771
HSA-MIR-449299.8768.253611
HSA-MIR-3151-5P99.8663.831069

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

OrganismSymbolGene ID
danio_reriochrnb2ENSDARG00000017790
danio_reriochrnb5bENSDARG00000021392
mus_musculusChrnb2ENSMUSG00000027950
rattus_norvegicusChrnb2ENSRNOG00000020778

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-2P17787 (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)

IDNameType
IPR002394Nicotinic_acetylcholine_rcptFamily
IPR006029Neurotrans-gated_channel_TMDomain
IPR006201Neur_channelFamily
IPR006202Neur_chan_lig-bdDomain
IPR018000Neurotransmitter_ion_chnl_CSConserved_site
IPR036719Neuro-gated_channel_TM_sfHomologous_superfamily
IPR036734Neur_chan_lig-bd_sfHomologous_superfamily
IPR038050Neuro_actylchol_recHomologous_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.

PDBMethodResolution (Å)
8ST4ELECTRON MICROSCOPY2.35
8ST0ELECTRON MICROSCOPY2.4
8SSZELECTRON MICROSCOPY2.64
8ST3ELECTRON MICROSCOPY2.93
8ST2ELECTRON MICROSCOPY2.94
8ST1ELECTRON MICROSCOPY3.41
6CNJELECTRON MICROSCOPY3.7
6UR8ELECTRON MICROSCOPY3.71
6USFELECTRON MICROSCOPY3.87
6CNKELECTRON MICROSCOPY3.9
5KXIX-RAY DIFFRACTION3.94
2K58SOLUTION NMR
2K59SOLUTION NMR
2KSRSOLUTION NMR
2LM2SOLUTION NMR

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-P17787-F181.160.51

Antibody-complex structures (SAbDab): 96CNJ, 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):

PositionPhenotype
72reduces chrna4:chrnb2 channel opening potentiation by divalent cations.
74reduces chrna4:chrnb2 channel opening potentiation by divalent cations.
196loss of chrna4:chrnb2 channel opening potentiation by divalent cations.
197increases ligand activation in ls and hs nachr subtypes.
202reduces chrna4:chrnb2 channel opening potentiation by divalent cations.
218reduces chrna4:chrnb2 channel opening potentiation by divalent cations.
285increases ca(2+) permeability.

Function

Pathways and Gene Ontology

Reactome pathways

9 pathways

IDPathway
R-HSA-629587Highly sodium permeable postsynaptic acetylcholine nicotinic receptors
R-HSA-629594Highly calcium permeable postsynaptic nicotinic acetylcholine receptors
R-HSA-629597Highly calcium permeable nicotinic acetylcholine receptors
R-HSA-112314Neurotransmitter receptors and postsynaptic signal transmission
R-HSA-112315Transmission across Chemical Synapses
R-HSA-112316Neuronal System
R-HSA-181431Acetylcholine binding and downstream events
R-HSA-622323Presynaptic nicotinic acetylcholine receptors
R-HSA-622327Postsynaptic 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:

CategoryPathways
Presynaptic nicotinic acetylcholine receptors2
Postsynaptic nicotinic acetylcholine receptors2
Acetylcholine binding and downstream events2
Transmission across Chemical Synapses1
Neuronal System1
Neurotransmitter receptors and postsynaptic signal transmission1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
learning or memory2
postsynaptic neurotransmitter receptor activity2
monoatomic ion channel complex2
plasma membrane signaling receptor complex2
plasma membrane2
plasma membrane region2
response to stress1
response to decreased oxygen levels1
transport1
metal ion transport1
muscle contraction1
cell communication1
cellular process1
signaling1
regulation of cellular process1
cellular response to stimulus1
anterograde trans-synaptic signaling1
chemical synaptic transmission1
sensory perception of light stimulus1
sensory perception of mechanical stimulus1
behavior1
learning1
visual behavior1
associative learning1
dopamine secretion1
regulation of catecholamine secretion1
sensory perception1
cranial nerve development1
optic nerve development1
cranial nerve morphogenesis1
thalamus development1
neural nucleus development1
central nervous system neuron axonogenesis1
monoatomic ion channel activity1
ligand-gated channel activity1
transmembrane signaling receptor activity1
synaptic transmission, cholinergic1
acetylcholine binding1
excitatory extracellular ligand-gated monoatomic ion channel activity1
ligand-gated monoatomic cation channel activity1

Protein interactions and networks

STRING

1424 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
CHRNB2CHRM2P08172710
CHRNB2CHRNA4P43681683
CHRNB2IGBP1P78318677
CHRNB2KCNT1Q5JUK3669
CHRNB2GABBR2O75899662
CHRNB2CHRM5P08912660
CHRNB2SLC17A6Q9P2U8650
CHRNB2DRD2P14416618
CHRNB2GRIN2AQ12879601
CHRNB2SLC6A3Q01959599
CHRNB2GRIN2BQ13224591
CHRNB2DEPDC5O75140585
CHRNB2PURAQ00577575
CHRNB2DRD1P21728572
CHRNB2ACHEP22303560

IntAct

18 interactions, top by confidence:

ABTypeScore
CHRNB2CHRNA5psi-mi:“MI:0915”(physical association)0.660
CHRNA5CHRNB2psi-mi:“MI:0914”(association)0.660
CHRNB2CHRNA5psi-mi:“MI:0914”(association)0.660
CHRNA4CHRNB2psi-mi:“MI:0915”(physical association)0.490
CHRNB2CRELD2psi-mi:“MI:0915”(physical association)0.440
CRELD2CHRNB2psi-mi:“MI:0403”(colocalization)0.440
CHRNA4CHRNB2psi-mi:“MI:0915”(physical association)0.400
LYPD6CHRNB2psi-mi:“MI:0914”(association)0.350
LYNX1CHRNB2psi-mi:“MI:0914”(association)0.350
CHRNB2TMEM131Lpsi-mi:“MI:0914”(association)0.350
CHRNB2SNX2psi-mi:“MI:0914”(association)0.350
IL5RALETM1psi-mi:“MI:0914”(association)0.350
STRIP2OXSR1psi-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.

AEffectBMechanism
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):

ClassificationCount (floor)
Pathogenic2
Likely pathogenic3
Uncertain significance372
Likely benign242
Benign18

Top pathogenic / likely-pathogenic (5)

Variant IDHGVSClassification
17495NM_000748.3(CHRNB2):c.859G>C (p.Val287Leu)Pathogenic
17496NM_000748.3(CHRNB2):c.859G>A (p.Val287Met)Pathogenic
1030889NM_000748.3(CHRNB2):c.845T>A (p.Leu282His)Likely pathogenic
3061958NM_000748.3(CHRNB2):c.256-1G>ALikely pathogenic
3391473NM_000748.3(CHRNB2):c.1010T>G (p.Val337Gly)Likely pathogenic

SpliceAI

996 predictions. Top by Δscore:

VariantEffectΔscore
1:154568106:CAGGT:Cdonor_loss1.0000
1:154568107:AGGTA:Adonor_loss1.0000
1:154568109:G:GAdonor_loss1.0000
1:154568110:T:Gdonor_loss1.0000
1:154569455:T:Aacceptor_gain1.0000
1:154569458:CCA:Cacceptor_loss1.0000
1:154569459:CA:Cacceptor_loss1.0000
1:154569460:A:AGacceptor_gain1.0000
1:154569460:AG:Aacceptor_gain1.0000
1:154569460:AGG:Aacceptor_gain1.0000
1:154569460:AGGG:Aacceptor_gain1.0000
1:154569461:G:Aacceptor_gain1.0000
1:154569461:G:GAacceptor_gain1.0000
1:154569461:GGG:Gacceptor_gain1.0000
1:154569461:GGGG:Gacceptor_gain1.0000
1:154569461:GGGGT:Gacceptor_gain1.0000
1:154569565:GAC:Gdonor_gain1.0000
1:154569566:ACA:Adonor_gain1.0000
1:154569603:GTGTG:Gdonor_gain1.0000
1:154569605:GTG:Gdonor_gain1.0000
1:154569606:TG:Tdonor_gain1.0000
1:154569607:GG:Gdonor_gain1.0000
1:154569608:G:GCdonor_loss1.0000
1:154569608:G:GGdonor_gain1.0000
1:154570249:A:AGacceptor_gain1.0000
1:154570250:T:Gacceptor_gain1.0000
1:154570254:CCAG:Cacceptor_loss1.0000
1:154570255:CAG:Cacceptor_loss1.0000
1:154570256:A:AGacceptor_gain1.0000
1:154570256:AG:Aacceptor_gain1.0000

AlphaMissense

3287 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
1:154569540:C:AP48Q1.000
1:154569825:T:AW82R1.000
1:154569825:T:CW82R1.000
1:154570261:T:AW87R1.000
1:154570261:T:CW87R1.000
1:154570263:G:CW87C1.000
1:154570263:G:TW87C1.000
1:154570267:G:CD89H1.000
1:154570274:G:CR91P1.000
1:154570277:T:CL92P1.000
1:154570282:T:AW94R1.000
1:154570282:T:CW94R1.000
1:154570284:G:CW94C1.000
1:154570284:G:TW94C1.000
1:154570339:T:AW113R1.000
1:154570339:T:CW113R1.000
1:154570341:G:CW113C1.000
1:154570341:G:TW113C1.000
1:154570346:C:AP115Q1.000
1:154571256:T:AW145R1.000
1:154571256:T:CW145R1.000
1:154571280:A:CS153R1.000
1:154571282:C:AS153R1.000
1:154571282:C:GS153R1.000
1:154571286:T:AC155S1.000
1:154571286:T:CC155R1.000
1:154571287:G:AC155Y1.000
1:154571287:G:CC155S1.000
1:154571288:C:GC155W1.000
1:154571307:T:CF162L1.000

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

DiseaseClassificationInheritance
autosomal dominant nocturnal frontal lobe epilepsy 3StrongAutosomal dominant
autosomal dominant nocturnal frontal lobe epilepsySupportiveAutosomal dominant

ClinGen Gene-Disease Validity (1)

Expert-panel classifications — Definitive > Strong > Moderate > Limited > Disputed > Refuted.

DiseaseClassificationInheritance
familial sleep-related hypermotor epilepsyDefinitiveAD

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):

HPOTerm
HP:0000006Autosomal dominant inheritance
HP:0000020Urinary incontinence
HP:0000708Atypical behavior
HP:0000716Depression
HP:0000733Motor stereotypy
HP:0000739Anxiety
HP:0001250Seizure
HP:0001256Mild intellectual disability
HP:0001345Psychotic mentation
HP:0002069Bilateral tonic-clonic seizure
HP:0002268Paroxysmal dystonia
HP:0002883Hyperventilation
HP:0004305Involuntary movements
HP:0007018Attention deficit hyperactivity disorder
HP:0011174Focal hyperkinetic seizure
HP:0011182Interictal epileptiform activity
HP:0011193EEG with focal spikes
HP:0025235NREM parasomnia
HP:0025236Sleep walking
HP:0031535Increased theta frequency activity in EEG
HP:0031589Suicidal ideation
HP:0031951Nocturnal seizures
HP:0100543Cognitive impairment
HP:0000252Microcephaly
HP:0000490Deeply set eye

GWAS associations

3 associations (top):

StudyTraitp-value
GCST004294_8Nicotine dependence4.000000e-06
GCST008809_1Smoking behaviour (cigarettes smoked per day)4.000000e-08
GCST012497_2Lung function (FEV1)4.000000e-07

EFO canonical traits (2, from GWAS)

EFO IDTrait name
EFO:0006525cigarettes per day measurement
EFO:0004314forced expiratory volume

MeSH disease descriptors (6)

DescriptorNameTree numbers
D015841EnophthalmosC11.675.319
D008607Intellectual DisabilityC10.597.606.360; C23.888.592.604.646; F01.700.687; F03.625.539
D008831MicrocephalyC05.660.207.620; C10.500.507.400.500; C16.131.621.207.620; C16.131.666.507.400.500
C579932Autosomal Dominant Nocturnal Frontal Lobe Epilepsy (supp.)
C563930Epilepsy, Nocturnal Frontal Lobe, Type 1 (supp.)
C565334Epilepsy, 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).

MoleculeNamePhasePatents
CHEMBL1076903VARENICLINE45,807
CHEMBL267936MECAMYLAMINE45,623
CHEMBL289469GRANISETRON4431
CHEMBL3NICOTINE4184,969
CHEMBL46ONDANSETRON441,386
CHEMBL56564TROPISETRON419,312
CHEMBL667ACETYLCHOLINE4124,626
CHEMBL894BUPROPION436,982
CHEMBL965CARBAMOYLCHOLINE422,580
CHEMBL2103881DEXMECAMYLAMINE318
CHEMBL497939CYTISINICLINE32,766
CHEMBL111659ALTINICLINE2129
CHEMBL1172928RADAFAXINE21,079
CHEMBL122270LOBELINE22,266
CHEMBL1257065STILONIUM IODIDE2751
CHEMBL1258006BRADANICLINE2208
CHEMBL127071POZANICLINE2360
CHEMBL132966RIVANICLINE2911
CHEMBL134713GTS-212269
CHEMBL188462ISPRONICLINE2464
CHEMBL2151437AZD03282
CHEMBL2179529AZD14462
CHEMBL238465SOFINICLINE2
CHEMBL430497TEBANICLINE2
CHEMBL504652TC-22161
CHEMBL6200NORNICOTINE1

PharmGKB: 1 entry (VIP=true, CPIC=false)

PharmGKB clinical annotations

3 annotations.

VariantTypeLevelDrugsPhenotypes
rs2072658Other3nicotineTobacco Use Disorder
rs2072660Toxicity3nicotineTobacco Use Disorder
rs2072661Efficacy,Toxicity3nicotineTobacco Use Disorder

PharmGKB variants

5 variants.

VariantGenesLevelScore#Clin annotsDrugs
rs2072658CHRNB231.251nicotine
rs2072660CHRNB231.751nicotine
rs2072661CHRNB233.001nicotine
rs4292956CHRNB20.000
rs12072348CHRNB20.000

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.

LigandMeasureValuePatent
(S)-2-(6-Chloro-pyridin-3-yl)-7-aza-bicyclo[2.2.1]heptaneKI0.05 nM
syn-7-(6-chloro-pyridin-3-yl)-2-azabicyclo[2.2.1]heptaneKI0.0785 nM
5-[5-(azetidin-2-ylmethoxy)-6-methyl-3-pyridinyl]pent-4-yn-1-olKI0.087 nMUS-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-olKI0.23 nM
3-(4-Methyl-isoxazol-5-ylmethyl)-1-aza-bicyclo[2.2.1]heptaneKI0.3 nM
CHEMBL4740159KI0.32 nM
6-(6-Chloro-pyridin-3-yl)-8-aza-bicyclo[3.2.1]octaneKI0.343 nM
VARENICLINEKI0.48 nMUS-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof
7-(3-methylisoxazol-5-yl)-6-aza-bicyclo[2.2.1]heptaneKI0.763 nM
11-Bromo-1,2,3,4,5,6-hexahydro-1,5-methano-pyrido[1,2-a][1,5]diazocin-8-oneEC501.1 nM
CHEMBL3329537KI1.1 nM
CHEMBL4791046KI1.3 nM
CHEMBL4793576KI1.6 nM
(1S,4S)-2-(6-fluoro-3-pyridinyl)-2,5-diazabicyclo[2.2.1]-heptaneEC501.62 nM
CHEMBL2177548KI1.7 nM
CHEMBL3329538KI1.7 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-oneKI3.5 nMUS-11667638: 4-substitued cytisine analogues
CHEMBL2177550KI4.4 nM
6-[5-(azetidin-2-ylmethoxy)-6-methyl-3-pyridinyl]hex-5-yn-1-olKI5.3 nMUS-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof
CHEMBL3329539KI5.4 nM
CHEMBL3329542KI7 nM
6-(6-Chloro-pyridin-3-yl)-8-aza-bicyclo[3.2.1]octan-3-olKI7.4 nM
3-(azetidin-2-ylmethoxy)-5-(6-chlorohex-1-ynyl)-2-methylpyridineKI8.6 nMUS-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof
3-(azetidin-2-ylmethoxy)-5-(6-fluorohex-1-ynyl)-2-methylpyridineKI8.7 nMUS-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof
CHEMBL2178154KI9.6 nM
CHEMBL2057714KI10 nM
3-(azetidin-2-ylmethoxy)-5-(2-cyclopropylethynyl)-2-methylpyridineKI13 nMUS-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof
CHEMBL2177554KI13 nM
3-(3-Methyl-isoxazol-5-ylmethylene)-1-aza-bicyclo[2.2.1]heptaneIC5014 nM
3-[1-(3-Methyl-isoxazol-5-yl)-meth-(Z)-ylidene]-1-aza-bicyclo[2.2.1]heptaneIC5015 nM
3-(azetidin-2-ylmethoxy)-5-hex-1-ynyl-2-methylpyridineKI16 nMUS-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof
CHEMBL2177525KI22 nM
CHEMBL3329541KI22 nM
CHEMBL2177534KI24 nM
CHEMBL2057712KI29 nM
11,11-dimethyl-6-oxo-7-aza-11-azoniatricyclo[7.3.1.02,7]trideca-2,4-diene iodideEC5041 nM
CHEMBL3329540EC5053 nM
2-(6-chloropyridin-3-yl)-1,2,3,4-tetrahydro-1,4-epiminonaphthaleneKI65.2 nM
CHEMBL4798114KI88 nM
CHEMBL2296158IC5090 nM
2-(6-fluoro-5-phenylpyridin-3-yl)-1,2,3,4-tetrahydro-1,4-epiminonaphthaleneKI128 nM
5-hex-1-ynyl-2-methyl-3-(pyrrolidin-2-ylmethoxy)pyridineKI130 nMUS-9993465: 2,5-disubstituted-pyridyl nicotinic ligands, and methods of use thereof
CHEMBL3329544KI310 nM
CHEMBL4438684KI519 nM
CHEMBL3329545EC50540 nM
CHEMBL4472617KI627 nM
3-[1-(3-Methyl-isoxazol-5-yl)-meth-(E)-ylidene]-1-aza-bicyclo[2.2.2]octaneIC50854 nM
(1R,4R)-2-(5-cyano-3-pyridinyl)-2,5-diazabicyclo[2.2.1]-heptaneEC50980 nM
CHEMBL3329546EC501000 nM
CHEMBL4557590KI1010 nM

ChEMBL bioactivities

2055 potent at pChembl≥5 of 2326 total, top 50 by pChembl (potency: 10 = 0.1 nM, 6 = 1 µM).

pChemblTypeValueUnitMolecule
11.00Ki0.01nMEPIBATIDINE
11.00Kd0.01nMEPIBATIDINE
11.00Kd0.0101nMEPIBATIDINE
10.77Ki0.017nMCHEMBL2024096
10.77Ki0.01698nMCHEMBL2024096
10.74Ki0.018nMCHEMBL245243
10.70EC500.02nMEPIBATIDINE
10.70Ki0.02nMCHEMBL4168511
10.68Ki0.021nMCHEMBL361465
10.66Ki0.022nMCHEMBL361465
10.59Ki0.026nM(+)-EPIBATIDINE
10.57Ki0.027nMAZIDOEPIBATIDINE
10.52Kd0.03nMEPIBATIDINE
10.52Kd0.03nM(-)-EPIBATIDINE
10.52Ki0.03nMCHEMBL2164666
10.51Ki0.031nMCHEMBL3086984
10.49Ki0.032nMCHEMBL3086994
10.48Ki0.033nMEPIBATIDINE
10.47Ki0.034nMTEBANICLINE
10.46Ki0.035nMEPIBATIDINE
10.44EC500.036nMCHEMBL62858
10.42Ki0.038nMCHEMBL291498
10.40Ki0.04nMCHEMBL59986
10.40Ki0.04nMVARENICLINE
10.40Ki0.04nMCHEMBL63102
10.37Ki0.043nMCHEMBL3086985
10.35Ki0.045nM(+)-EPIBATIDINE
10.35Ki0.045nMNICOTINE
10.34Ki0.046nMCHEMBL3086982
10.34Ki0.046nMEPIBATIDINE
10.31Ki0.049nMCHEMBL3086991
10.30Ki0.05nMEPIBATIDINE
10.30Ki0.05nMCHEMBL3086995
10.30EC500.05nMCHEMBL305106
10.30Ki0.05nMCHEMBL59986
10.30Ki0.05nMCHEMBL54902
10.28Ki0.052nMCHEMBL59986
10.26Ki0.055nMTEBANICLINE
10.25Ki0.0558nMEPIBATIDINE
10.22EC500.06nMVARENICLINE
10.22Ki0.06nMVARENICLINE
10.22Ki0.06nMEPIBATIDINE
10.22Ki0.06nMCHEMBL5412811
10.21Ki0.062nMCHEMBL2024096
10.15Ki0.07nMEPIBATIDINE
10.14Ki0.072nMCHEMBL3086993
10.14Ki0.073nMCHEMBL185061
10.12Ki0.076nMCHEMBL3086986
10.11Ki0.0785nMCHEMBL220476
10.11Ki0.077nMCHEMBL5404069

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.

CompoundAssayTypeValueUnit
2-(6-chloro-3-pyridinyl)-7-methyl-7-azabicyclo[2.2.1]heptane304128: Displacement of [3H]epibatidine from alpha-4-beta-2 nAChRki<0.0001uM
2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane1410535: Displacement of [3H]epibatidine from alpha4beta2 nAChR (unknown origin) expressed in HEK cell membranes after 4 hrs by liquid scintillation counting methodki<0.0001uM
(1R,4R)-2-pyridin-3-yl-2,5-diazabicyclo[2.2.1]heptane1359521: Agonist activity at alpha4beta2 nAChR (unknown origin)ki<0.0001uM
(1S,2S,4R)-2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane1252856: Binding affinity to alpha4beta2 nAChR (unknown origin)ki<0.0001uM
5-[[(2R)-azetidin-2-yl]methoxy]-2-chloropyridine146301: Compound was evaluated for its ability to displace [3H]cytisine from K177 cells expressing human Nicotinic acetylcholine receptor alpha4-beta2ki<0.0001uM
2-(5-azido-6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane146309: Binding affinity to alpha4 beta-2 receptor subtype from mouse fibroblast M10 cells was measured using [3 H]nicotineki<0.0001uM
2-(6-chloro-3-pyridinyl)-9-azabicyclo[4.2.1]non-2-ene640183: Displacement of [3H]epibatidine from nAChR alpha4beta2 receptorki<0.0001uM
Varenicline1647833: Displacement of [3H]cytisine from human alpha4beta2 nAChR expressed in CHOK1 cell membrane by microbeta scintillation counting methodki<0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]pyridine146301: Compound was evaluated for its ability to displace [3H]cytisine from K177 cells expressing human Nicotinic acetylcholine receptor alpha4-beta2ki<0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-(2-phenylethynyl)pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki<0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-fluorophenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki<0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-fluoro-5-methylphenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki<0.0001uM
3-[2-[5-[[(2S)-azetidin-2-yl]methoxy]-3-pyridinyl]ethynyl]-5-fluoro-N,N-dimethylaniline1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki<0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-methylphenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki<0.0001uM
(1R,2R,4S)-2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane1275134: Binding affinity to alpha4beta2 nACh receptor (unknown origin) expressed in Xenopus oocyteskd<0.0001uM
Nicotine1359521: Agonist activity at alpha4beta2 nAChR (unknown origin)ki<0.0001uM
5-iodo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one246575: Change in membrane potential in K-177 cells expressing acetylcholine central neuronal receptor alpha4-beta2 subunitsec50<0.0001uM
2-(6-chloro-3-pyridinyl)-2,5-diazabicyclo[2.2.1]heptane1359521: Agonist activity at alpha4beta2 nAChR (unknown origin)ki<0.0001uM
1-decyl-3-[(2S)-1-methylpyrrolidin-2-yl]pyridin-1-ium iodide1243907: Binding affinity to alpha4beta2 nAChR (unknown origin)ki0.0001uM
6-methyl-5,7,13-triazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),5,9-tetraene254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0001uM
1-dodecyl-3-[(2S)-1-methylpyrrolidin-2-yl]pyridin-1-ium iodide1243907: Binding affinity to alpha4beta2 nAChR (unknown origin)ki0.0001uM
6-[5-[[(2S)-azetidin-2-yl]methoxy]-3-pyridinyl]hex-5-yn-1-ol1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
(1S,2S,5R)-2-(pyridin-3-yloxymethyl)-3-azabicyclo[3.1.0]hexane;hydrochloride1647833: Displacement of [3H]cytisine from human alpha4beta2 nAChR expressed in CHOK1 cell membrane by microbeta scintillation counting methodki0.0001uM
(1S,4S)-2-pyridin-3-yl-2,5-diazabicyclo[2.2.1]heptane1359521: Agonist activity at alpha4beta2 nAChR (unknown origin)ki0.0001uM
2-chloro-5-[(3S)-3-methyl(511C)pentyl]-3-[(E)-2-pyridin-4-ylethenyl]pyridine1988843: Binding affinity to nACh alpha6beta2 receptor (unknown origin) assessed as inhibition constantki0.0001uM
6-[5-(2-(18F)fluoro-3-pyridinyl)-3-pyridinyl]-8-methyl-8-azabicyclo[3.2.1]octane1988843: Binding affinity to nACh alpha6beta2 receptor (unknown origin) assessed as inhibition constantki0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-phenylpyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
(4S)-2-(6-chloro-3-pyridinyl)-7-azabicyclo[2.2.1]heptane146639: Binding affinity towards nicotinic acetylcholine receptor alpha4-beta2ki0.0001uM
6-(6-chloro-3-pyridinyl)-8-azabicyclo[3.2.1]octane276249: Displacement of [3H]epibatidine from human recombinant alpha4beta2 nAChR in HEK293 cells by SPA assayki0.0001uM
7-(6-chloro-3-pyridinyl)-2-azabicyclo[2.2.1]heptane276249: Displacement of [3H]epibatidine from human recombinant alpha4beta2 nAChR in HEK293 cells by SPA assayki0.0001uM
(1R,5S)-7-pyridin-3-yl-3-azabicyclo[3.3.1]non-6-ene705817: Displacement of [3H]nicotine from human alpha4beta2 nAChR expressed in human SH-EP1 cellski0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-fluoro-5-methoxyphenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3-chlorophenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(4-fluorophenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(3,5-difluorophenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
3-[[(2S)-azetidin-2-yl]methoxy]-5-[2-(2-fluorophenyl)ethynyl]pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
3-[[(2R)-azetidin-2-yl]methoxy]-5-(2-phenylethynyl)pyridine1053303: Displacement of [3H]epibatidine from human alpha4beta2 nAChR after 4 hrs by cell-based assayki0.0001uM
6-methyl-5-oxa-7,13-diazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),6,9-tetraene254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0001uM
7-methyl-5-oxa-6,13-diazatetracyclo[9.3.1.02,10.04,8]pentadeca-2(10),3,6,8-tetraene254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0001uM
5-bromo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one246575: Change in membrane potential in K-177 cells expressing acetylcholine central neuronal receptor alpha4-beta2 subunitsec500.0001uM
5-chloro-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one246575: Change in membrane potential in K-177 cells expressing acetylcholine central neuronal receptor alpha4-beta2 subunitsec500.0001uM
4,5-dichloro-10-azatricyclo[6.3.1.02,7]dodeca-2,4,6-triene254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0001uM
6-methyl-5-thia-7,13-diazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),6,9-tetraene254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0001uM
5,7,13-triazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),5,9-tetraene254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0001uM
3-pyridin-3-yl-3,7-diazabicyclo[3.3.1]nonane705817: Displacement of [3H]nicotine from human alpha4beta2 nAChR expressed in human SH-EP1 cellski0.0001uM
7-phenyl-5,7,13-triazatetracyclo[9.3.1.02,10.04,8]pentadeca-2,4(8),5,9-tetraene254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0001uM
1-(10-azatricyclo[6.3.1.02,7]dodeca-2(7),3,5-trien-4-yl)ethanone254476: Binding affinity for human Nicotinic acetylcholine receptor alpha4-beta2 expressed in HEK 293 cells using [3H]nicotineki0.0002uM
5-(6-chloro-3-pyridinyl)-2-azabicyclo[2.2.1]heptane276249: Displacement of [3H]epibatidine from human recombinant alpha4beta2 nAChR in HEK293 cells by SPA assayki0.0002uM
cytisinicline239394: Binding affinity against nicotinic acetylcholine receptor alpha4-beta2 in human HEK293 cells using [3H]- nicotine as radioligandki0.0002uM
(1R,3S,5R)-3-[(5-chloro-3-pyridinyl)oxymethyl]-2-azabicyclo[3.1.0]hexane;hydrochloride1647833: Displacement of [3H]cytisine from human alpha4beta2 nAChR expressed in CHOK1 cell membrane by microbeta scintillation counting methodki0.0002uM

CTD chemical–gene interactions

85 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
Acetylcholineaffects binding, affects reaction, decreases reaction, increases reaction, decreases activity (+3 more)15
Nicotineincreases phosphorylation, increases activity, increases expression, affects binding, increases response to substance (+2 more)6
Vareniclineaffects binding, increases activity4
Mecamylamineaffects binding, decreases activity, decreases reaction, increases activity, decreases uptake4
cytisineincreases activity, decreases reaction, affects binding3
Dihydro-beta-Erythroidineaffects binding, decreases activity, decreases reaction, increases activity, decreases uptake3
Tubocurarineaffects activity, affects binding, decreases reaction, increases activity, increases reaction (+1 more)3
tetrabromobisphenol Aaffects binding, decreases reaction, increases activity, affects cotreatment2
imidaclopridincreases activity, affects binding, decreases reaction2
epibatidineaffects binding, decreases reaction, increases activity2
Estradiolaffects binding, affects cotreatment, increases activity, increases expression2
Ethinyl Estradiolaffects binding, affects cotreatment, increases activity, affects activity, increases reaction (+1 more)2
Flame Retardantsaffects binding, decreases reaction, increases activity, affects cotreatment2
Lobelineaffects binding, decreases activity, decreases reaction, increases phosphorylation2
Pancuroniumdecreases activity, affects binding, decreases reaction, increases activity2
Physostigmineaffects binding, decreases activity, decreases reaction, affects activity, increases reaction2
Vecuronium Bromideaffects binding, decreases reaction, increases activity, decreases activity2
Cyclosporineincreases methylation, decreases expression2
triptolideaffects binding, decreases reaction, increases activity1
triphenyl phosphatedecreases reaction, increases activity, affects cotreatment1
bisphenol Aaffects binding, decreases reaction, affects activity1
subecholinedecreases activity, increases activity, affects binding, decreases reaction1
decabromobiphenyl etheraffects cotreatment, decreases reaction, increases activity1
decamethoniumdecreases activity, decreases reaction, affects binding1
2,4,2’,4’-tetrachlorobiphenylaffects binding, decreases reaction, increases activity, affects cotreatment1
antimony trioxideaffects cotreatment, decreases reaction, increases activity1
4-nonylphenolaffects activity, affects binding, decreases reaction1
celastrolaffects binding, decreases reaction, increases activity1
methyllycaconitinedecreases reaction, affects binding, decreases activity1
4-octylphenolaffects binding, decreases reaction, affects activity1

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 IDTypeDescriptionSource paper
CHEMBL1669854BindingBinding affinity to beta2 nAChRSynthesis and structure-analgesic activity relationships of a novel series of monospirocyclopiperazinium salts (MSPZ). — Bioorg Med Chem Lett
CHEMBL1022415FunctionalAgonist activity at human alpha4beta2 nAChR expressed in HEK293 cells assessed as intracellular calcium level by FLIPR assayComplementary three-dimensional quantitative structure-activity relationship modeling of binding affinity and functional potency: a study on alpha4beta2 nicotinic ligands. — J Med Chem
CHEMBL5166939ToxicityInhibition of human recombinant nAChRalpha4/beta2 incubated for 120 mins by radiometric scintillation counting methodDesign 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):

CellosaurusNameCategorySex
CVCL_5I63K177Transformed cell lineFemale
CVCL_C7NIMKN1 CHRNB2 KO-1Cancer cell lineMale
CVCL_C7NJMKN1 CHRNB2 KO-2Cancer cell lineMale
CVCL_D1KGPrecisION hnAChR alpha4/alpha6/beta2-HEKTransformed cell lineFemale
CVCL_D1KHPrecisION hnAChR alpha4/beta2-HEKTransformed cell lineFemale
CVCL_SJ01HAP1 CHRNB2 (-) 1Cancer cell lineMale
CVCL_SJ02HAP1 CHRNB2 (-) 2Cancer cell lineMale

Clinical trials (associated diseases)

213 trials via MONDO — disease-level, not drug-specific.

TrialPhaseStatusTitle
NCT05657860PHASE4COMPLETEDGuanfacine Extended Release for the Reduction of Aggression and Self-injurious Behavior Associated With Prader-Willi Syndrome
NCT05744479PHASE4RECRUITINGMetformin for Antipsychotic-induced Weight Gain in Adults With Intellectual Disability
NCT06107829PHASE4WITHDRAWNValbenazine Treatment of Tardive Dyskinesia in Adults With Intellectual/Developmental Disabilities
NCT06997198PHASE4NOT_YET_RECRUITINGDeutetrabenazine Treatment for Tardive Dyskinesia in Intellectual/Developmental Disabilities
NCT02270736PHASE3COMPLETEDClinical 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
NCT02304302PHASE2COMPLETEDDown Syndrome Memantine Follow-up Study
NCT03862950PHASE2COMPLETEDA Trial of Metformin in Individuals With Fragile X Syndrome (Met)
NCT04529226PHASE2UNKNOWNStudy to Compare Clozapine vs Treatment as Usual in People With Intellectual Disability & Treatment-resistant Psychosis
NCT04821856PHASE2COMPLETEDEvaluation of the Effectiveness of Cannabidiol in Treating Severe Behavioural Problems in Children and Adolescents With Intellectual Disability
NCT01119144PHASE2UNKNOWNPolycaprolactone / Tricalcium Phosphate (PCL/TCP) v Titanium Orbital Implant : Randomised Trial
NCT05273320PHASE1COMPLETEDClinical Trial of Nabilone for Aggression in Adults With Intellectual and Developmental Disabilities
NCT05301361PHASE1ENROLLING_BY_INVITATIONSensitivity of the NIH Toolbox to Stimulant Treatment in Intellectual Disabilities
NCT06016764PHASE1COMPLETEDUse of MRI and cTBS for Catatonia in Autism
NCT06586827PHASE1COMPLETEDImpact of Competency-Based Training and Technical Assistance Employment Outcomes of Individuals With ID/DD
NCT07531940PHASE1NOT_YET_RECRUITINGEscalating Doses of Memantine in Down Syndrome (MEDS-123)
NCT03479476PHASE2/PHASE3COMPLETEDA Trial of Metformin in Individuals With Fragile X Syndrome
NCT02616796PHASE1/PHASE2COMPLETEDEffects of Social Gaze Training on Brain and Behavior in Fragile X Syndrome
NCT06860672EARLY_PHASE1RECRUITINGClinical Trial of the Dual Vector Base Editor for the Treatment of the CHD3-R1025W Mutation
NCT00597948Not specifiedCOMPLETEDHealthy Lifestyles for People With Intellectual Disabilities
NCT01087320Not specifiedRECRUITINGGenome Medical Sequencing for Gene Discovery
NCT01652963Not specifiedUNKNOWNPicture-based Computerised Assessment and Training of Cognitive Behaviour Therapy Skills
NCT01695395Not specifiedCOMPLETEDMental Health Care Provision for Adults With Intellectual Disability and a Mental Disorder
NCT01867554Not specifiedCOMPLETEDResearch and Characterization of New Genes Involved in Intellectual Disability
NCT01915381Not specifiedCOMPLETEDImproving Adherence Healthy Lifestyle With a Smartphone Application Based on Adults With Intellectual Disabilities
NCT01988623Not specifiedCOMPLETEDPivotal Response Treatment for Individuals With Intellectual Disabilities
NCT02099773Not specifiedCOMPLETEDSupport Staff-client Interactions With Augmentative and Alternative Communication
NCT02136849Not specifiedCOMPLETEDInter-regional Project of the Great Western Exploration Approach for Exome Molecular Causes Severe Intellectual Disability Isolated or Syndromic
NCT02225041Not specifiedCOMPLETEDSedation Strategy and Cognitive Outcome After Critical Illness in Early Childhood
NCT02414438Not specifiedCOMPLETEDEstablishing the Clinical Utility of First StepDx PLUS and NextStepDx PLUS Study
NCT02451761Not specifiedCOMPLETEDApparently Balanced Chromosomal Translocation/ Next-generation Sequencing/ Intellectual Disability
NCT02461420Not specifiedACTIVE_NOT_RECRUITINGMapping the Genotype, Phenotype, and Natural History of Phelan-McDermid Syndrome
NCT02461459Not specifiedACTIVE_NOT_RECRUITINGAutism Spectrum Disorder (ASD) and Intellectual Disability (ID) Determinants in Tuberous Sclerosis Complex (TSC)
NCT02486081Not specifiedCOMPLETEDDevelopment and Application-Smart Football for Movement Evaluation and Training in the Special Education Population
NCT02504502Not specifiedCOMPLETEDEnhancing Genomic Laboratory Reports to Enhance Communication and Empower Patients
NCT02513277Not specifiedCOMPLETEDDiabetes Screening & Prevention for People With Learning (Intellectual) Disabilities:STOP Diabetes Study
NCT02561754Not specifiedCOMPLETEDWeight Management for Adolescents With IDD
NCT02591446Not specifiedCOMPLETEDTranscranial Magnetic Stimulation Studies in Autism Spectrum Disorders
NCT02714868Not specifiedCOMPLETEDEvaluation of Project TEAM (Teens Making Environmental and Activity Modifications)
NCT02721394Not specifiedUNKNOWNFCT With Young Children With ID in the UK: A Feasibility Project V.1
NCT02746614Not specifiedCOMPLETEDPsychomotor Therapy Effects in Adaptive Behavior and Motor Proficiency in Intellectual Disability