Overview
- Peptide (C)RRLLQEHYPPRLV(S)G, corresponding to amino acid residues 179 - 193 of mouse C5aR2 (Accession Q8BW93). Extracellular, 2nd loop.
Western blot analysis of rat brain lysate (lanes 1 and 3) and mouse brain lysate (lanes 2 and 4):1-2. Anti-C5aR2 (extracellular) Antibody (#AAR-034), (1:400).
3-4. Anti-C5aR2 (extracellular) Antibody, preincubated with C5aR2 (extracellular) Blocking Peptide (BLP-AR034).
Western blot analysis of mouse J774 macrophage cell line lysate (lanes 1 and 3) and mouse M1 myeloid leukemia cell line lysate (lanes 2 and 4):1-2. Anti-C5aR2 (extracellular) Antibody (#AAR-034), (1:400).
3-4. Anti-C5aR2 (extracellular) Antibody, preincubated with C5aR2 (extracellular) Blocking Peptide (BLP-AR034).
The complement system is a vital component of the innate immune system that play an important role in the immune responses to infectious organisms and tissue damages 1. The activation of the complement system is carried out through a proteolytic enzymes cascade generating various peptides and fragments 2.
One of the most important component of the complement system is a protein named complement protein C5 3. Upon proteolytic cleavage of C5 two peptides are generated, C5a and C5b 4. C5a is known to be the most potent chemotactic factor in cells and responsible for the directed migration of cells involved in the immune response to infectious organisms and tissue damages 5.
There are two different C5a receptors, C5aR1 (C5aR, CD88) and C5aR2 (C5L2, GPR77). C5aR1 is a member of the G-protein coupled receptors (GPCRs), and known to mediate the vast majority of C5a biological activity 6. In contrast C5aR2 does not exhibit any functional coupling to G proteins and it exact mechanism of action remains controversial 7.
Expression of C5aR2 can be found in various tissues such as, bone marrow, spleen, lung and in immune cells such as myeloid cells and T cells 3.
