ATR (ATM and Rad3-related protein)

ATR (ATM and Rad3-related protein) is a critical enzyme involved in maintaining DNA stability. It detects DNA damage, especially from stress during cell division or exposure to external factors like radiation. When damage occurs, ATR activates a response that pauses cell division, allowing repair mechanisms to fix the DNA. This process helps prevent mutations that could lead to diseases like cancer. ATR works alongside other proteins in a complex network to ensure cells maintain healthy genetic information and respond appropriately to DNA stress, supporting overall cellular health and stability.