DLG2 (Discs Large Homolog 2) is a gene that encodes a protein from the membrane-associated guanylate kinase (MAGUK) family, which is essential for synaptic assembly and function. This protein plays a crucial role in the nervous system by supporting synaptic plasticity and neuronal signaling. Alterations in DLG2 have been linked to neurological disorders, underscoring its significance in brain development and function.