EIF4EBP2 is a translation repressor enriched in the brain that regulates eukaryotic initiation factor 4E (eIF4E) activity and plays critical roles in synaptic plasticity and memory formation 1. The protein functions through phosphorylation-dependent mechanisms: hypophosphorylated EIF4EBP2 binds eIF4E and prevents assembly of the eIF4F translation initiation complex, thereby repressing translation; conversely, hyperphosphorylated forms dissociate from eIF4E, allowing translation initiation 21. EIF4EBP2 is regulated by mTORC1 signaling, which phosphorylates it in response to growth factors and nutrient availability 34. Activity-dependent mTORC1-EIF4EBP2 signaling in hippocampal inhibitory interneurons is essential for memory formation 5. Clinically, dysregulation of EIF4EBP2 associates with cancer progression; tumor cells exploit impaired EIF4EBP2 function to enhance eIF4E-dependent translation and promote metabolic reprogramming during energetic stress 6. Additionally, EIF4EBP2 copy number variants have been identified in Ebstein anomaly, a congenital cardiac defect 7, and EIF4EBP2 emerges as a candidate biomarker in multiple sclerosis pathogenesis 8. Restoration of EIF4EBP2 function through PP2A activation shows promise for suppressing eIF4E-dependent translation in cancer therapy 9.