Glutamate receptor ionotropic AMPA subunit 1 (GluA1)

Glutamate receptor ionotropic AMPA subunit 1 (GluA1) is one of the four primary subunits (GluA1-4) that assemble to form AMPA-type ionotropic glutamate receptors (AMPARs), which mediate the fast neurotransmission of glutamatergic synapses in the central nervous system[1][2][3]. The canonical AMPA receptor ion channel is a tetramer, which may be homomeric (all GluA1) or heteromeric (mixed subunits), and forms a cation-selective transmembrane channel that opens in response to glutamate binding[1][2]. GluA1-containing receptors are critical for synaptic plasticity, including long-term potentiation, and play central roles in memory formation and learning[2]. Their unique regulatory properties and trafficking mechanisms also distinguish them from other subunit assemblies. Dysregulation of GluA1 and associated AMPARs is implicated in numerous CNS pathologies, making them key therapeutic and research targets[1][2][3].

Other names

GluA1AMPA receptor subunit 1GRIA1 (gene name)α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor subunit 1AMPAR subunit 1

- Noncompetitive antagonism (e.g., Perampanel inhibits channel opening in response to glutamate) - Competitive antagonism (blocks glutamate binding, e.g., NBQX, ZK 200775) - Allosteric modulation (binding at sites outside of glutamate binding domain, affecting gating/desensitization) - Channel blocking (pore blockers prevent ion flow)