gamma-aminobutyric acid type A receptor subunit gamma2
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Diagnostic Grade (Green)
DDG2P
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknownEarly onset or syndromic epilepsy
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknownIntellectual disability
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknownLikely inborn error of metabolism
MONOALLELIC, autosomal or pseudoautosomal, NOT imprintedUndiagnosed metabolic disorders
MONOALLELIC, autosomal or pseudoautosomal, NOT imprintedFetal anomalies
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknownChildhood onset dystonia, chorea or related movement disorder
Familial Hirschsprung Disease
UnknownGeneralized epilepsy with febrile seizures-plus
childhood absence epilepsy
epilepsy
Seizure
Lennox-Gastaut syndrome
insomnia
migraine disorder
major depressive disorder
panic disorder
anxiety disorder
Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.
Gamma-aminobutyric acid receptor subunit gamma-2
Gamma subunit of the heteropentameric ligand-gated chloride channel gated by gamma-aminobutyric acid (GABA), a major inhibitory neurotransmitter in the brain (PubMed:14993607, PubMed:16412217, PubMed:23909897, PubMed:2538761, PubMed:25489750, PubMed:27864268, PubMed:29950725, PubMed:30602789). GABA-gated chloride channels, also named GABA(A) receptors (GABAAR), consist of five subunits arranged around a central pore and contain GABA active binding site(s) located at the alpha and beta subunit interface(s) (PubMed:29950725, PubMed:30602789). When activated by GABA, GABAARs selectively allow the flow of chloride anions across the cell membrane down their electrochemical gradient (PubMed:14993607, PubMed:16412217, PubMed:2538761, PubMed:27864268, PubMed:29950725, PubMed:30602789). Gamma-2/GABRG2-containing GABAARs are found at both synaptic and extrasynaptic sites (By similarity). Chloride influx into the postsynaptic neuron following GABAAR opening decreases the neuron ability to generate a new action potential, thereby reducing nerve transmission (By similarity). GABAARs containing alpha-1 and beta-2 or -3 subunits exhibit synaptogenic activity; the gamma-2 subunit being necessary but not sufficient to induce rapid synaptic contacts formation (PubMed:23909897, PubMed:25489750). Extrasynaptic gamma-2-containing receptors contribute to the tonic GABAergic inhibition (By similarity). GABAARs function also as histamine receptor where histamine binds at the interface of two neighboring beta subunits and potentiates GABA response in a gamma-2 subunit-controlled manner (By similarity)
Curated MONDO disease pages that list GABRG2 among their top associated genes.
GABRG2 · P18507
Mean pLDDT
77.2/ 100
Confident
475 residues
Confidence breakdown
AlphaFold (Jumper et al., 2021) · CC BY 4.0
