EPDR1 (Epidermal growth factor receptor pathway substrate 15-related protein 1) is a protein involved in cellular signaling, similar to MMP15’s role in extracellular matrix dynamics. As part of the epidermal growth factor receptor (EGFR) pathway substrate family, EPDR1 participates in regulating key processes like cell proliferation, survival, and differentiation. It interacts with important signaling molecules to modulate growth factor signaling cascades, helping cells respond to external signals such as growth factors and cytokines. Through these actions, EPDR1 influences cell fate decisions and maintains tissue homeostasis.