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