p53 (tumor protein)

p53 is a crucial protein in the body that acts as a quality control agent for cells. It helps monitor DNA for damage and can trigger repair processes or cause damaged cells to die, preventing them from becoming cancerous. Often called the "guardian of the genome," p53 maintains cellular health by stopping abnormal cell growth. If p53 is defective or missing, damaged cells may continue dividing uncontrollably, increasing cancer risk. Its proper function is vital for preventing cancer development, and many tumors have altered p53 activity.