GRIN3A (Glutamate Ionotropic Receptor NMDA Type Subunit 3A) is a gene that encodes a subunit of the NMDA receptor, part of the glutamate receptor family. NMDA receptors are essential for synaptic plasticity, learning, and memory, playing a central role in neuronal communication. Variations in GRIN3A can influence brain function and are of interest in neurological research.