All GluN2 (GRIN2) family subunits, GluN2A (GRIN2A), GluN2B (GRIN2B), GluN2C (GRIN2C) and GluN2D (GRIN2D), can bind to any of the PSD-95 protein family members DLG1 (SAP-97), DLG2 (PSD-93), DLG3 (SAP-102) and DLG4 (PSD-95). Binding to different PSD-95 family members does not affect transport of GluN1:GluN2 (GRIN1:GRIN2) NMDA receptors to the plasma membrane, but does affect their positioning and retention at the plasma membrane postsynaptic density, as well as their excitability (Cui et al. 2007, Cousins et al. 2008, Bard et al. 2010). DLG4, the most prominent postsynaptic density protein, can also interact directly with GluN1 isoforms that possess the PDZ-binding domain in their C-terminus (Kornau et al. 1995).
Cui, H, Hayashi, A, Sun, HS, Belmares, MP, Cobey, C, Phan, T, Schweizer, J, Salter, MW, Wang, YT, Tasker, RA, Garman, D, Rabinowitz, J, Lu, PS, Tymianski, M
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