Phosphotyrosine (Ptp99A) Antibody – Mouse Monoclonal

Background Info: Reacts with phosphotyrosine, and detects the presence of phosphotyrosine in both un-stimulated and stimulated cell lysates. Does not cross-react with phosphoserine or phosphothreonine.

Scientific Background: Protein phosphorylation is an important posttranslational modification that serves many key functions to regulate a protein's activity, localization, and protein-protein interactions. Phosphorylation is catalyzed by various specific protein kinases, which involves removing a phosphate group from ATP and covalently attaching it to to a recipient protein that acts as a substrate. Most kinases act on both serine and threonine; others act on tyrosine, and a number (dual specificity kinases) act on all three. Because phosphorylation can occur at multiple sites on any given protein, it can therefore change the function or localization of that protein at any time (3). Changing the function of these proteins has been linked to a number of diseases, including cancer, diabetes, heart disease, inflammation and neurological disorders (4-6). In particular, the phosphorylation of tyrosine is considered one of the key steps in signal transduction and regulation of enzymatic activity (7). Phosphotyrosine can be detected through specific antibodies, and are helpful in facilitating the identification of tyrosine kinase substrates (8).

1. Garton A.J., Flint A.J., and Tonks N.K. (1996) Mol and Cell Bio 16(11): 6408-6418. 2. Garton A.J., and Tonks N.K. (1999) J Bio Chem. 274(6): 3811-3818. 3. Goto H. et al. (2005) Nature Cell Biology 8: 180-187. 4. Blume-Jensen P. and Hunter T. (2001) Nature 411:355- 365. 5. Downward J. (2001) Nature 411: 759-762. 6. Pawson T. and Saxton T.M. (1999) Cell 97: 675-678. 7. Frackelton A.R. Jr., Ross A.H., and Eisen H.N. (1983) Mol Cell Biol. 3: 1343-1352. 8. Ross A.H., Baltimore D., and Eisen H.N. (1981) Nature 294: 654-656. 9. Tiganis T., Kemp B.E., and Tonks N.K. (1999) J. Bio Chem. 274(39): 27768-27775.

Small volumes of anti-Ptp99A antibody vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.

MBS804197 is an antibody targeting Ptp99A. Also known as Phosphotyrosine Antibody: ATTO 594. Host: Mouse.