Glutamate receptor subunit AMPA type 1 (GluA1)

Glutamate receptor subunit AMPA type 1 (GluA1) is one of four core subunits (GluA1–GluA4) that assemble as homo- or hetero-tetrameric complexes to form the AMPA subtype of ionotropic glutamate receptors, which are ligand-gated cation channels mediating fast excitatory synaptic transmission in the central nervous system[1][2][4][5]. Upon glutamate binding, these receptors conduct Na⁺ and, depending on subunit composition, Ca²⁺ ions into the postsynaptic neuron, thereby initiating depolarization and synaptic signaling[1][2][4][5]. GluA1-containing AMPA receptors are particularly important for activity-dependent synaptic insertion during long-term potentiation (LTP), a cellular correlate of learning and memory, and are dynamically regulated via auxiliary proteins (e.g., TARPs, CNIH, GSG1L) that modulate trafficking, localization, and channel kinetics[1][2][3][4]. Dysregulation of GluA1 is implicated in several neurological and psychiatric conditions, and AMPARs are explored as drug targets for epilepsy, neurodegeneration, and other brain disorders[2][4][5].

Other names

AMPA receptor subunit GluA1α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptor 1GRIA1GluR1 (older nomenclature)AMPAR subunit 1

Competitive antagonism (block glutamate binding), Non-competitive antagonism (stabilize closed/inactive channel state), Allosteric modulation (alter gating kinetics or channel conductance), Channel blocking (directly occlude the ion pore)