FBW7

FBW7 is a protein that functions as a molecular "quality control" within cells. Its primary role is to identify and target other proteins for degradation, ensuring that cell growth and division remain balanced. By tagging specific proteins with a small molecule called ubiquitin, FBW7 directs them to be broken down by the cell’s disposal system, preventing uncontrolled growth that could lead to cancer. Essentially, FBW7 acts as a tumor suppressor, maintaining cellular health by regulating the levels of proteins involved in cell cycle control and growth signals.