E2 enzymes

E2 enzymes, also known as ubiquitin-conjugating enzymes, are essential proteins in the cell's process of protein regulation. They play a key role in attaching a small protein called ubiquitin to other proteins, marking them for degradation, altering their activity, or changing their location within the cell. E2 enzymes work by receiving ubiquitin from E1 enzymes and then transferring it to target proteins with the help of E3 enzymes, ensuring precise control over protein lifespan and function. This process is vital for maintaining cellular health and regulating various biological functions.