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

The Gamma-aminobutyric acid type A receptor subunit beta-2 (GABRB2) is a critical component of the heteropentameric GABAA receptor complex, which serves as the primary mediator of fast inhibitory neurotransmission in the central nervous system (1.1.1, 1.3.1). As a ligand-gated chloride channel, the receptor opens upon GABA binding, allowing chloride ions to flow into the neuron and cause hyperpolarization, thereby reducing neuronal excitability (1.1.2, 1.3.1). The beta-2 subunit is one of the most abundantly expressed beta subunits in the brain and is essential for both phasic (synaptic) and tonic (extrasynaptic) inhibition (1.1.1, 1.3.2). Genetic variations and mutations in the GABRB2 gene are strongly associated with a spectrum of neurological and psychiatric disorders, including various forms of epilepsy, schizophrenia, and intellectual disability (1.2.2, 1.4.1, 1.4.4). Pharmacologically, receptors containing the beta-2 subunit are key targets for several classes of CNS drugs, including general anesthetics like etomidate and propofol, and anticonvulsants like loreclezole, which exhibit selectivity for beta-2/3 subunits over the beta-1 isoform (1.3.2, 1.3.3).

Other names

GABA(A) receptor subunit beta-2GABAA receptor beta-2 subunitGABA receptor beta-2GABRB2

Positive allosteric modulation, Negative allosteric modulation, Agonism, Antagonism