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β3

Family: Nicotinic acetylcholine receptors

Contents:
Gene and Protein Information
Previous and Unofficial Names
Database Links
Tissue Distribution
Physiological Consequences of Altering Gene Expression
Clinically-Relevant Mutations and Pathophysiology
General Comments
References
Gene and Protein Information
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human 4 458 8p11.2 CHRNB3 cholinergic receptor, nicotinic, beta 3 (neuronal) 11
Mouse 4 464 8 A3 Chrnb3 cholinergic receptor, nicotinic, beta polypeptide 3 4
Rat 4 464 16q12.3 Chrnb3 cholinergic receptor, nicotinic, beta 3 (neuronal) 3
Previous and Unofficial Names
cholinergic receptor, nicotinic, beta polypeptide 3
acetylcholine receptor, nicotinic, beta 3 (neuronal)
cholinergic receptor, nicotinic, beta 3
neuronal acetylcholine receptor subunit beta-3
Acrb3
5730417K16Rik
Database Links
ChEMBL Target
Ensembl
Entrez Gene
GeneCards
GenitoUrinary Development Molecular Anatomy Project
HomoloGene
Human Protein Reference Database
InterPro
KEGG Gene
OMIM
PharmGKB Gene
PhosphoSitePlus
Protein Ontology (PRO)
RefSeq Nucleotide
RefSeq Protein
TreeFam
UniGene Hs.
UniProt
Wikipedia
Search for 3D structures on the PDB
Search by keyword: Nicotinic acetylcholine receptors β3
Natural/Endogenous Ligand(s)
acetylcholine
Tissue Distribution
Brain: substantia nigra pars compacta, ventral tegmental area, locus coeruleus, medial habenula, superior colliculus.
Expression level:  High
Species:  Mouse
Technique:  in situ hybridisation
References:  2
Brain: substantia nigra pars compacta, ventral tegmental area, locus coeruleus, medial habenula
Expression level:  High
Species:  Rat
Technique:  in situ hybridisation
References:  3
Tissue Distribution Comments
The pattern of expression of β3 mRNA in rat brain resemples that of α6 however, in contrast to α6, high levels of expression occur in the medial habenula.[3] In rhesus monkey (Macaca mulatta) brain the expression pattern is similar to that in rodents, with high levels of in substantia nigra pars compacta, vertral tegmental area and medial habenula[8]. As with patterns in squirrel monkey (Saimiri sciureus) brain ( showing high levels of expression in substantia nigra pars compacta, vertral tegmental area and medial habenula)[9].

Comparison of radioligand binding in wild-type and β3 knockout mice reveals no significant difference in high affinity [3H]-nicotine binding but a decrease in cytisine-resistant [3H]-epibatidine binding and a substantial decrease in the density of [125I]α-conotoxinMII binding in the visual and mesostriatal pathways. However, the reduction in [125I] α-conotoxinMII binding in β3 knockout mice is less dramatic than in α6 knockout mice [1-2].

Radioligand binding and immunoprecipitation studies with β3 knockout mice also reveal a reduction in α6-containing receptors in the striatum, midbrain and superior colliculus, indicating that a substantial fraction of α6 receptors also contain theβ3 subunit. β3-containing receptors not associated with the α6 subunit are selectively expressed in the medial habenula [5-7].
Physiological Consequences of Altering Gene Expression
Knockout mice have altered locomotor activity and altered prepulse inhibition of acoustic startle. Mice survive to birth but have impaired growth and increased perinatal mortality.
Species:  Mouse
Tissue:  in vivo
Technique:  Gene knockout
References:  2
Clinically-Relevant Mutations and Pathophysiology
Disease:  Nicotine dependence and lung cancer
References:  10
Mutations not determined
General Comments
The mouse β3 subunit exists as two variants, the largest of which is tabulated above.

REFERENCES

To cite this database page, please use the following:

Cecilia Gotti, Michael. J. Marks, Neil S. Millar, Susan Wonnacott.
Nicotinic acetylcholine receptors: β3. Last modified on 07/11/2011. Accessed on 24/05/2013. IUPHAR database (IUPHAR-DB), http://iuphar-db.org/DATABASE/ObjectDisplayForward?objectId=473.


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