Epidermal Growth Factor Receptor, phosphorylated (Tyr1068) (erbB, EGFR)

The epidermal growth factor (EGF) receptor is a 170kD transmembrane tyrosine kinase that belongs to the HER/ErbB protein family. Ligand binding results in receptor dimerization, autophosphorylation, activation of downstream signaling and lysosomal degradation. Phosphorylation of EGF receptor (EGFR) at Tyr845 in the kinase domain is implicated in stabilizing the activation loop, maintaining the active state enzyme and providing a binding surface for substrate proteins. c-Src is involved in phosphorylation of EGFR at Tyr845. The SH2 domain of PLCgamma binds at phospho-Tyr992, resulting in activation of PLCgamma-mediated downstream signaling. Phosphorylation of EGFR at Tyr1045 creates a major docking site for c-Cbl, an adaptor protein that leads to receptor ubiquitination and degradation following EGFR activation. The GRB2 adaptor protein binds activated EGFR at phospho-Tyr1068. A pair of phosphorylated residues (Tyr1148 and Tyr1173) provides a docking site for the SHC scaffold protein, with both sites involved in MAP kinase signaling activation. Phosphorylation of EGFR at specific serine and threonine residues attenuates EGFR kinase activity. EGFR carboxy-terminal residues Ser1046 and Ser1047 are phosphorylated by CaM kinase II; mutation to either of these serines results in upregulated EGFR tyrosine autophosphorylation.\n\nApplications:\nSuitable for use in ELISA, Western Blot and Immunohistochemistry. Other applications have not been tested.\n\nRecommended Dilutions: \nWestern Blot: 1:1000 \nImmunohistochemistry (Paraffin): 1:350 Use EDTA as the unmasking buffer. Dilute E3375-53A in TBST, 5% NGS.\nOptimal dilutions to be determined by the researcher.\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

E3375-53A

Size

100ul

Applications

ELISA, IHC, WB

Hosts

Rabbit

Reactivities

Hum, Mouse, Rat

Form

Supplied as liquid in 10mM HEPES, pH 7.5, 150mM sodium chloride, 0.1mg/ml BSA, 50% glycerol. No preservative added.

P Type

Pab

Purity

Purified by Protein A and peptide affinity chromatography.

Isotype

IgG

References

1. Hackel, P.O. et al. (1999) Curr Opin Cell Biol 11, 184-9. 2. Zwick, E. et al. (1999) Trends Pharmacol Sci 20, 408-12. 3. Cooper, J.A. and Howell, B. (1993) Cell 73, 1051-4. 4. Hubbard, S.R. et al. (1994) Nature 372, 746-54. 5. Biscardi, J.S. et al. (1999) J Biol Chem 274, 8335-43. 6. Emlet, D.R. et al. (1997) J Biol Chem 272, 4079-86. 7. Levkowitz, G. et al. (1999) Mol Cell 4, 1029-40. 8. Ettenberg, S.A. et al. (1999) Oncogene 18, 1855-66. 9. Rojas, M. et al. (1996) J Biol Chem 271, 27456-61. 10. Feinmesser, R.L. et al. (1999) J Biol Chem 274, 16168-73.

Additional Info

Recognizes endogenous levels of human EGF receptor at ~175kD only when phosphorylated at Tyr1068. May recognize other activated EGF receptor family members (ErbB2) and crossreacts slightly with activated PDGF receptor. Species Crossreactivity: mouse and rat\n