MAGI2 is a membrane-associated guanylate kinase scaffold protein that plays critical roles in cellular architecture and signaling across multiple tissues. The protein functions as a scaffold molecule at synaptic junctions by assembling neurotransmitter receptors and cell adhesion proteins 1. In podocyte development, MAGI2 is a key target of the transcription factor WT1, where it regulates the WNT signaling pathway alongside BMPER and PAX2 2. MAGI2 maintains tight junction integrity in intestinal epithelial cells, with its expression being constitutively downregulated in celiac disease, affecting the expression of several tight junction-related genes 3. The protein also functions as a tumor suppressor in various cancers, with mounting evidence indicating essential roles in maintaining cell structural integrity in non-neuronal tissues 1. In breast cancer, MAGI2 interacts with CLDN6 to prevent KLF5 nuclear entry, thereby restraining SREBF1 transcription and ultimately inhibiting RAS palmitoylation-mediated oncogenic activation 4. Additionally, MAGI2 promoter hypermethylation is associated with gastric cancer progression and may serve as a prognostic biomarker 5. These diverse functions establish MAGI2 as a crucial scaffold protein involved in cellular organization, tumor suppression, and disease pathogenesis.