YWHAE encodes 14-3-3 epsilon, an adapter protein that regulates diverse signaling pathways through binding to phosphoserine/phosphothreonine motifs on target proteins 12. The protein functions as a molecular scaffold, modulating the activity of binding partners and facilitating protein relocalization 34. YWHAE plays critical roles in neurodevelopment, as loss-of-function variants cause a distinct neurodevelopmental disorder characterized by developmental delay, seizures, and brain malformations including corpus callosum hypoplasia and ventricular dilatation 56. The protein is essential for proper brain structure, with knockout mice displaying thin cerebral cortex, corpus callosum dysgenesis, and hydrocephalus 5. Beyond neurodevelopment, YWHAE functions in cancer biology and cellular stress responses. It acts as an intracellular component of TNFR2 complexes, mediating protective effects against osteoarthritis through ERK/Elk-1 activation and NF-κB suppression 7. In cancer contexts, YWHAE promotes tumor progression through multiple mechanisms, including regulation of ferroptosis in hepatoblastoma via SLC7A11 expression 8 and facilitating glioma stem cell mesenchymal transition through HDAC5 complex interactions 9. Clinical significance includes its role as a biomarker in gastric cancer associated with H. pylori infection and its involvement in sarcoma translocations 1011.