C3 convertase

C3 convertase is a key enzyme in the immune system's complement pathway, which helps defend against infections. It forms when specific proteins (C3b and other factors) come together on the surface of a pathogen, acting like a molecular machine. Its main function is to cut a protein called C3 into smaller pieces, C3a and C3b. C3b tags pathogens for destruction and helps activate other immune responses, while C3a attracts immune cells to the infection site. Overall, C3 convertase amplifies the immune response, making it more effective at eliminating harmful microbes.