ACVR2B also known as ACTR-IIB plays a crucial role in the transforming growth factor beta (TGF-β) signaling pathway, which is essential for regulating various cellular processes, including cell differentiation, proliferation, and apoptosis. ACVR2B is primarily located on the cell membrane, where ACVR2B interacts with other receptor types to form a signaling complex that transmits extracellular signals into the cell, thereby influencing gene expression and developmental processes. ACVR2B′s location in the cell enables precise regulation of signaling pathways vital for maintaining cellular homeostasis and responding to environmental cues. Dysregulation of ACVR2B has been implicated in various diseases, including cancer and fibrotic disorders, highlighting ACVR2B′s significance as a therapeutic target.