PHACTR4 (Phosphatase and Actin Regulator 4): PHACTR4 is a multifunctional protein that plays a key role in regulating cellular signaling pathways and cytoskeletal dynamics. It functions through interactions with protein phosphatase 1 (PP1) and actin filaments. PHACTR4 is involved in important cellular processes such as cell cycle progression, cell migration, and neuronal development. By modulating PP1 activity, it helps regulate various cellular functions including gene expression and metabolism. Additionally, PHACTR4 has been linked to cardiovascular diseases, especially coronary artery disease, where it impacts endothelial function and vascular remodeling.