N-methyl-D-aspartate receptor subunit GluN2A (GluN2A)

N-methyl-D-aspartate receptor subunit GluN2A is a protein encoded by the GRIN2A gene and serves as a regulatory subunit in NMDA receptors, a subclass of glutamate-gated ion channels highly permeable to calcium ions. NMDA receptors are heterotetramers typically formed by two GluN1 and two GluN2A–D subunits, with GluN2A contributing unique channel gating properties, high calcium permeability, and synaptic localization, especially in adult neurons. GluN2A-containing NMDA receptors are crucial for learning, memory, and synaptic plasticity, and disproportionately expressed at synaptic sites due to their interactions with scaffold proteins like PSD-95. Pathological changes in GluN2A function or localization are involved in neurodegenerative and neurodevelopmental diseases. Selective targeting of NMDA receptors containing GluN2A subunits represents a promising therapeutic strategy for neuroprotection and cognitive modulation, but with considerable safety concerns due to the importance of this receptor in normal brain function[1][2][3][8].

Other names

GRIN2A (gene name)Glutamate [NMDA] receptor subunit epsilon-1NMDA receptor subunit 2ANMDAR subunit GluN2A

Noncompetitive inhibition (memantine, ketamine block channel pore); Competitive antagonism at the glutamate site (not commonly used clinically, but utilized in experiments); Allosteric modulation (zinc restricts activity; experimental selective antagonists act via allosteric sites)