complement component 8 subunit a

Expression system: E. coli
Length: 31-584, Full Length of Mature Protein
Activity: Not Tested

Complement component C8 is a constituent of the membrane attack complex, C8 alpha, C8 beta and C8G. C8G is a secreted protein and comsists a disulfide-linked C8 alpha-gamma heterodimer and a non-covalently associated C8 beta chain. C8 alpha and C8 beta play an important role in complement-mediated bacterial killing together.C8 is involved in the formation of Membrane Attack Complex on bacterial cell membranes. 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. The gamma subunit seems to be able to bind retinol. Patients lacking C8 are susceptible to certain bacterial infections.

ATP6V1F encodes a component of vacuolar ATPase mediating acidification. The cDNA and the genomic sequences of ATP6V1F were cloned successfully for the first time from the Giant Panda (Ailuropoda melanoleuca) using reverse transcription polymerase chain reaction and touchdown-polymerase chain reaction, respectively. Topology prediction showed that there is one protein kinase C phosphorylation site, two Casein kinase II phosphorylation sites, and one N-myristoylation site in the ATP6V1F protein. Up-regulated expression of mammary tumor 8 kDa protein (MAT-8), complement component C1S (C1S), ferritin heavy chain (FTH1), peptidyl-prolyl cis-trans isomerase A (PPIA), RNA-binding protein regulatory subunit DJ-1 protein (DJ-1) and vacuolar ATP synthase subunit F (ATP6V1F) was determined in prostate carcinoma and confirmed by using quantitative real-time RT-PCR analyses.