Neuronal nicotinic acetylcholine receptor alpha-2 subunit (CHRNA2)

The neuronal nicotinic acetylcholine receptor alpha-2 subunit (CHRNA2) is a protein that forms part of the pentameric ligand-gated ion channels responsible for fast excitatory neurotransmission in the central nervous system (UniProt, P17676). These receptors are predominantly found in the cerebral cortex and thalamus, where they contribute to the regulation of sleep-wake cycles and cognitive functions like memory and attention (PubMed, PMID: 22539423). Mutations in the CHRNA2 gene have been linked to autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE), highlighting its role in maintaining cortical excitability (NIH, GeneReviews). As a therapeutic target, CHRNA2-containing receptors are explored for their potential in treating epilepsy and nicotine dependence, with drugs like varenicline acting as partial agonists (PubChem, CID 5310966). However, the high degree of homology between nAChR subunits presents a challenge for developing subtype-selective ligands to avoid off-target effects (PubMed, PMID: 30103434). Understanding the specific distribution and stoichiometry of alpha-2 containing subtypes is essential for targeting these receptors in neurological disorders.

Other names

Nicotinic acetylcholine receptor alpha-2 subunitnAChR alpha-2Cholinergic receptor nicotinic alpha 2 subunitCHRNA2Neuronal nicotinic acetylcholine receptor alpha-2-containing subtypes

Agonist, partial agonist, or antagonist modulation of ligand-gated ion channel activity to regulate neuronal excitability and cholinergic signaling.