ITGAV/ITGB8
(Integrin alpha V beta 8 (ITGAV/ITGB8))
Protein-Typ
Recombinant
Biologische Aktivität
Active
Proteineigenschaft
AA 31-992
Spezies
Human
Quelle
HEK-293 Cells
Aufreinigungstag / Konjugat
Dieses ITGAV/ITGB8 Protein ist gelabelt mit His tag.
Applikation
Functional Studies (Func)
Sequenz
AA 31-992
Produktmerkmale
Human ITGAV & ITGB8 Heterodimer Protein, produced by co-expression of ITGAV and ITGB8, has a calculated MW of 113 kDa (ITGAV) and 75.5 kDa (ITGB8). Subunit ITGAV is fused with polyhistidine tag at the C-terminus and followed by a acidic tail and subunit ITGB8 contains no tag but a basic tail at the C-terminus. The reducing (R) protein migrates as 145 kDa (ITGAV) and 100-116 kDa (ITGB8) respectively due to glycosylation.
Integrin alpha V beta 8 (ITGAV & ITGB8 or ITGAVB8) is expressed in yolk sac, placenta, brain perivascular astrocytes, Schwann cells, renal glomerular mesangial cells and pulmonary epithelial cells. Unlike other alpha V integrins, ITGAVB8 does not appear to assume different activation states, and the cytoplasmic tail does not connect to the cytoskeleton. It binds ligands containing an RGD motif, including vitronectin, fibrin and the latency associated peptide (LAP) of the latent TGF-beta complex. High affinity binding of alpha V beta 8 to LAP allows proteolytic cleavage by MT1-MMP, which releases active TGF-beta. This mechanism differs from that of alpha V beta 6, the other alpha V integrin which can activate TGF-beta from latency through non-proteolytic mechanisms. Downstream effects of TGF-beta activation include control of cell growth and associated vascularization.