GTP Ring Opening Enzyme, also known as GTPase Activating Protein (GAP), is an essential enzyme involved in cellular processes. Synonyms for this enzyme include GTPase-activating protein, GTPase activating protein, and GTPase activating factor. These terms are interchangeably used to refer to the same enzyme with the function of facilitating the hydrolysis of GTP. This enzymatic activity plays a crucial role in regulating the activity of GTP-binding protein (G-protein) signaling pathways. By promoting the conversion of GTP to GDP, these enzymes ensure proper signaling termination and maintenance of cellular homeostasis. Understanding the various synonyms for GTP Ring Opening Enzyme aids in grasping its vital role in cellular signaling and regulation.