C5aR, Human, mAb S5/1,Hycult Biotech,HM2094

The monoclonal antibody S5/1 recognizes the human receptor for C5a (CD88). The C5a receptor- is a seven transmembrane GTP-binding-protein-coupled receptor of 45kDa which binds with high affinity to human anaphylatoxin C5a. Upon C5a binding- G-protein-dependent cellular- responses are initiated such as increased intracellular Ca2+, granule fusion with the cell membrane, enzyme release and oxidative burst suggesting that C5aR is an important mediator of inflammation. The C5a receptor is expressed on a broad range of cell types, including- neutrophils, monocytes/macrophages, dendritic cells, astrocytes and microglia. Interestingly, C5a receptor signalling has been associated with several inflammatory diseases including rheumatoid arthritis.- Clone S5/1 was raised against a synthetic peptide comprising the N-terminal domain of the C5aR (Met1-Asn31). The antibody has been shown to inhibit the binding of C5a to its receptor.