disease:Defects in C8A are a cause of complement C8 deficiency type I [MIM:120950]. Patients with deficiency of C8 suffer from recurrent bacterial infections, predominantly from Neisseria meningitidis.,function:C8 is a constituent of the membrane attack complex. C8 binds to the C5b-7 complex, forming the C5b-8 complex. C5-b8 binds C9 and acts as a catalyst in the polymerization of C9.,similarity:Belongs to the complement C6/C7/C8/C9 family.,similarity:Contains 1 EGF-like domain.,similarity:Contains 1 LDL-receptor class A domain.,similarity:Contains 1 MACPF domain.,similarity:Contains 2 TSP type-1 domains.,subunit:C8 is composed of three chains: alpha, beta and gamma. The alpha and gamma chains are disulfide bonded.,
Secreted. Cell membrane; Multi-pass membrane protein. Secreted as soluble protein. Inserts into the cell membrane of target cells.
Blood,Liver,Plasma,