Glutamate receptor ionotropic, delta-2 subunit (GRID2)

Glutamate receptor ionotropic, delta-2 subunit (GRID2) is a member of the ionotropic glutamate receptor family, predominantly expressed in cerebellar Purkinje cells, where it is essential for synapse formation, synaptic plasticity, and motor coordination[1][2][3]. Unlike typical ionotropic glutamate receptors, GRID2 is an orphan receptor that does not directly respond to glutamate but can interact with glycine and D-serine, though channel gating requires the presence of additional synaptic proteins (cerebellin-1 and neurexin-1β)[1][2][3]. Dysfunction or mutation of GRID2 leads to neurodevelopmental disorders, especially forms of cerebellar ataxia, and the receptor has a key (but indirect) role in maintaining normal cerebellar circuitry and motor function. Structural and pharmacological studies confirm its role as a cation-selective ion channel within the subfamily of delta-type ionotropic glutamate receptors, but its pharmacology remains poorly explored, with no current clinical drugs specifically targeting GRID2[1][2][3].

Other names

GluD2GluRδ2GluR delta-2 subunitGLURD2SCAR18glutamate receptor ionotropic, delta-2glutamate receptor delta-2 subunitglutamate receptor, ionotropic, delta 2gluR delta-2 subunit

Antagonism of delta-2-containing ionotropic glutamate receptors (for the compounds above; however, pharmacological targeting in clinical use is unestablished)