Anti-C1S / Complement C1s subcomponent

In 1X PBS, pH 7.4, with 0.09% sodium azide and 50% glycerol. C1S, also called Complement C1s subcomponent, is a serine protease enzyme that plays a significant role in the activation of the Complement system, which is a part of the innate immune system. C1S is a key component of the C1 complex, which is the first step in the Complement activation cascade. One of the main functions of C1S is to cleave C4 and C2 proteins, leading to the formation of the C3 convertase enzyme. This enzyme then cleaves C3 protein into two parts, C3a and C3b, which mediate various immune responses such as inflammation, opsonization, and cell lysis. Overall, the activation of the Complement system through C1S plays a critical role in enhancing the immune response and clearing pathogens from our bodies. In addition to its role in immune defense, C1S has also been implicated in other physiological processes such as inflammation, tissue repair, and development. Dysregulation of C1S activity has been linked to various diseases, including autoimmune disorders, inflammatory conditions, and infectious diseases. Protein function: Component of the complement C1 complex, a multiprotein complex that initiates the classical pathway of the complement system, a cascade of proteins that leads to phagocytosis and breakdown of pathogens and signaling that strengthens the adaptive immune system (PubMed:11445589, PubMed:16169853, PubMed:417728, PubMed:467643, PubMed:6271784, PubMed:6282646, PubMed:6319179, PubMed:70787, PubMed:9422791). C1S is activated following association of the C1 complex with immunoglobulins (IgG or IgM) complexed with antigens to form antigen-antibody complexes on the surface of pathogens (PubMed:34155115). C1S is cleaved and activated by C1R to generate C1s subcomponent heavy and light chains (PubMed:11445589, PubMed:6271784). C1s subcomponent light chain then cleaves and activates C2 and C4, the next components of the classical complement pathway (PubMed:16169853, PubMed:467643, PubMed:6282646, PubMed:6319179, PubMed:6906228, PubMed:70787, PubMed:9422791). [The UniProt Consortium]