GABRA2

GABA is the major inhibitory neurotransmitter in the mammalian brain where it acts at GABA-A receptors, which are ligand-gated chloride channels. Chloride conductance of these channels can be modulated by agents such as benzodiazepines that bind to the GABA-A receptor. At least 16 distinct subunits of GABA-A receptors have been identified. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2013]

Gamma-Aminobutyric Acid Type A Receptor Alpha2 Subunit

Ligand-gated chloride channel which is a component of the heteropentameric receptor for GABA, the major inhibitory neurotransmitter in the brain (PubMed:29961870, PubMed:31032849).

Plays an important role in the formation of functional inhibitory GABAergic synapses in addition to mediating synaptic inhibition as a GABA-gated ion channel (PubMed:29961870, PubMed:31032849).

The gamma2 subunit is necessary but not sufficient for a rapid formation of active synaptic contacts and the synaptogenic effect of this subunit is influenced by the type of alpha and beta subunits present in the receptor pentamer (By similarity).

The alpha2/beta2/gamma2 receptor exhibits synaptogenic activity whereas the alpha2/beta3/gamma2 receptor shows very little or no synaptogenic activity (By similarity).

Chemical synaptic transmission Source: GO_Central
Chloride transmembrane transport Source: GO_Central
Gamma-aminobutyric acid signaling pathway Source: UniProtKB
Inhibitory synapse assembly Source: UniProtKB
Ion transmembrane transport Source: GO_Central
Nervous system process Source: GO_Central
Neurotransmitter transport Source: UniProtKB
Regulation of membrane potential Source: GO_Central
Regulation of neurotransmitter levels Source: UniProtKB
Regulation of postsynaptic membrane potential Source: GO_Central
Signal transduction Source: GO_Central
Synaptic transmission, GABAergic Source: GO_Central

Postsynaptic cell membrane; Cell membrane; Cytoplasmic vesicle membrane; Dendrite

Developmental and epileptic encephalopathy 78 (DEE78):
A form of epileptic encephalopathy, a heterogeneous group of severe early-onset epilepsies characterized by refractory seizures, neurodevelopmental impairment, and poor prognosis. Development is normal prior to seizure onset, after which cognitive and motor delays become apparent. DEE78 is an autosomal dominant form characterized by onset of refractory seizures in the first days or months of life. Clinical features include severe developmental delay, hypotonia, microcephaly, cortical visual impairment and profound intellectual disability. Some patients manifest a less severe phenotype characterized by pharmacoresponsive epilepsy, autism spectrum disorder and moderate intellectual disability.

Glycosylated.