Gamma-aminobutyric acid type A receptor subunit beta-3 (GABRB3) (GABRB3)

The Gamma-aminobutyric acid type A receptor subunit beta-3 (GABRB3) is a vital protein component of the GABA-A receptor, which serves as the primary inhibitory neurotransmitter receptor in the human central nervous system [1]. As a member of the Cys-loop family of ligand-gated ion channels, GABRB3 contributes to the formation of a pentameric complex that facilitates chloride ion influx upon GABA binding, resulting in neuronal hyperpolarization and reduced excitability [2]. This subunit is particularly significant during early brain development, where it influences synaptogenesis and the maturation of neural circuits [3]. Genetic variations or deficiencies in GABRB3 are linked to several neurological conditions, most notably Angelman syndrome, autism, and childhood absence epilepsy [4]. From a pharmacological perspective, GABRB3 is a critical mediator of the effects of intravenous anesthetics such as propofol and etomidate, which bind to specific niches within the beta subunit to enhance inhibitory signaling [5]. Its widespread involvement in both physiological regulation and pathological states makes it a cornerstone for developing treatments for seizures, sleep disorders, and anesthetic management [6].

Other names

GABRB3GABA(A) receptor subunit beta-3GABA receptor beta-3 subunitGABA-A receptor subunit beta-3Gamma-aminobutyric acid receptor subunit beta-3

Positive allosteric modulation of the GABA-A receptor complex, increasing chloride ion conductance and leading to neuronal hyperpolarization.