Gamma-aminobutyric acid receptor subunit beta-2 (GABRB2) (GABRB2)

The Gamma-aminobutyric acid receptor subunit beta-2 (GABRB2) is a fundamental component of the GABA_A receptor, the primary inhibitory neurotransmitter receptor in the mammalian brain (UniProt: P47870). As a member of the Cys-loop ligand-gated ion channel family, it typically forms a pentameric complex with alpha and gamma subunits to create a chloride-selective channel (NCBI Gene: 2561). This subunit is widely distributed in the central nervous system and is crucial for maintaining the balance between neuronal excitation and inhibition (PMID: 28813301).\n\nMutations in the GABRB2 gene are clinically significant, often associated with epilepsy syndromes, febrile seizures, and psychiatric conditions like schizophrenia (PMID: 30135574). Pharmacologically, the beta-2 subunit is a critical site for the action of general anesthetics such as propofol and etomidate, which enhance GABA-mediated inhibition (PubChem: 4943). Additionally, it mediates the effects of certain anticonvulsants and sedatives, making it a focal point for developing therapies for sleep disorders and anxiety (PMID: 11160514). Understanding the specific role of GABRB2 helps in the design of subtype-selective drugs that aim to minimize side effects like excessive sedation or respiratory depression (StatPearls: NBK513311).

Other names

GABA(A) receptor subunit beta-2GABR beta-2GABA receptor beta-2 subunitGABRB2

Positive allosteric modulation of the GABA-A receptor complex, increasing chloride conductance and hyperpolarizing neurons (StatPearls: NBK513311).