- SynonymIntegrin alpha V beta 8,ITGAV&ITGB8
- SourceMouse ITGAV&ITGB8 Heterodimer Protein, His Tag&Tag Free (IT8-M52W6) is expressed from human 293 cells (HEK293). It contains AA Phe 31 - Val 988 (ITGAV) & Gly 22 - Leu 681 (ITGB8) (Accession # P43406-1 (ITGAV) & Q0VBD0-1 (ITGB8)).Predicted N-terminus: Phe 31 (ITGAV) & Gly 22 (ITGB8)Request for sequence
- Molecular Characterization
Mouse ITGAV&ITGB8 Heterodimer Protein, His Tag&Tag Free, produced by co-expression of ITGAV and ITGB8, has a calculated MW of 112.5 kDa (ITGAV) and 77.5 kDa (ITGB8). Subunit ITGAV is fused with an acidic tail at the C-terminus and followed by a polyhistidine tag and subunit ITGB8 contains no tag but a basic tail at the C-terminus. The non-reducing (NR) protein migrates as 130-150 kDa (ITGAV) and 80-90 kDa (ITGB8) respectively due to glycosylation.
- EndotoxinLess than 1.0 EU per μg by the LAL method.
- Purity
>95% as determined by reduced SDS-PAGE.
- Formulation
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 150 mM NaCl, pH7.5. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
- Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
- Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
Mouse ITGAV&ITGB8 Heterodimer Protein, His Tag&Tag Free on SDS-PAGE under non-reducing (NR) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
Immobilized Mouse ITGAV&ITGB8 Heterodimer Protein, His Tag&Tag Free (Cat. No. IT8-M52W6) at 5 μg/mL (100 μL/well) can bind Biotinylated Human Latent TGF-Beta 1, His,Avitag (Cat. No. TG1-H82Qb) with a linear range of 1-10 ng/mL (QC tested).
Immobilized Human Fibronectin at 2 μg/mL (100 μL/well) can bind Mouse ITGAV&ITGB8 Heterodimer Protein, His Tag&Tag Free (Cat. No. IT8-M52W6) with a linear range of 0.156-5 μg/mL (Routinely tested).
Immobilized Human Vitronectin at 2 μg/mL (100 μL/well) can bind Mouse ITGAV&ITGB8 Heterodimer Protein, His Tag&Tag Free (Cat. No. IT8-M52W6) with a linear range of 0.156-5 μg/mL (Routinely tested).
- BackgroundIntegrin 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.
- References
- (1)Moyle, M. et al., 1991, J. Biol. Chem. 266:19650-8.
- (2)Nishimura SL., et al., 1994, J Biol Chem. 269(46):28708-15.
- (3)Araya, J. et al., 2006, Am. J. Pathol. 169:405-15.
- (4)Mu,D.et al.,2002, J. Cell Biol.157:493-507.
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