Cell Signaling Technology

Product Pathways - Tyrosine Kinase/ Adaptors

Phospho-VEGF Receptor 2 (Tyr1212) (11A3) Rabbit mAb #2477

Applications Reactivity Sensitivity MW (kDa) Isotype
W H M Transfected Only 230 Rabbit IgG

Applications Key:  W=Western Blotting
Reactivity Key:  H=Human  M=Mouse
Species cross-reactivity is determined by Western blot.

Protocols

Specificity / Sensitivity

Phospho-VEGF Receptor-2 (Tyr1212) (11A3) Rabbit mAb detects transfected levels of VEGFR-2 only when phosphorylated at tyrosine 1212. The antibody does not cross-react with other phosphorylated receptor tyrosine kinases.

Source / Purification

Monoclonal antibodies are produced by immunizing rabbits with a synthetic phospho-peptide (KLH-coupled) corresponding to residues surrounding Tyr1212 of human VEGF receptor-2.

Western Blotting

Western Blotting

Western blot analysis of recombinant human GST-VEGF Receptor 2 (Val789-Val1356), untreated or λ phosphatase-treated, using Phospho-VEGF Receptor 2 (Tyr1212) (11A3) Rabbit mAb (upper) and VEGF Receptor 2 Antibody #2472 (lower).

IP

IP

Phospho-VEGF Receptor 2 (Tyr1212) (11A3) Rabbit mAb specifically binds to phosphorylated VEGFR2, but not other phosphorylated tyrosine kinases. Western blot analysis of extracts from cells expressing different activated tyrosine kinase proteins, using Phospho-VEGF Receptor-2 (Tyr1212) (11A3) Rabbit mAb (upper) and Phospho-Tyrosine mAb (P-Tyr-100) #9411 (lower). CKR/PAE cells (lanes 12 and 13) express chimeric receptors containing human CSF-1 extracellular binding domain/mouse VEGF receptor-2 intracellular domain (5). CSF-1 stimulates phosphorylation of Tyr1212 of intracellular VEGF receptor-2 domain (lane 12) , which was specifically detected by Phospho-VEGF Receptor-2 (Tyr1212) (11A3) Rabbit mAb.

Background

Vascular endothelial growth factor receptor 2 (VEGFR2, KDR, Flk-1) is a major receptor for VEGF-induced signaling in endothelial cells. Upon ligand binding, VEGFR2 undergoes autophosphorylation and becomes activated (1). Major autophosphorylation sites of VEGFR2 are located in the kinase insert domain (Tyr951/996) and in the tyrosine kinase catalytic domain (Tyr1054/1059) (2). Activation of the receptor leads to rapid recruitment of adaptor proteins, including Shc, GRB2, PI-3 kinase, Nck and the protein tyrosine phosphatases SHP-1 and SHP-2 (3). The phosphorylation of Tyr1212 provides a docking site for Grb2 binding and phospho-Tyr1175 binds with the p85 subunit of PI-3 kinase and PLCγ, as well as Shb (1,4,5). Signaling from VEGFR2 is necessary for the execution of VEGF-stimulated proliferation, chemotaxis and sprouting, as well as survival of cultured endothelial cells in vitro and angiogenesis in vivo (6-8).

  1. Meyer, M. et al. (1999) EMBO J. 18, 363-374.
  2. Dougher-Vermazen, M. et al. (1994) Biochem. Biophys. Res. Commun. 205, 728-738.
  3. Kroll, J. and Waltenberger, J. (1997) J. Biol. Chem. 272, 32521-32527.
  4. Takahashi, T. et al. (2001) EMBO J. 20, 2768-2778.
  5. Holmqvist, K. et al. (2004) J. Biol. Chem. 279, 22267-22275.
  6. Karkkainen, M.J. and Petrova, T. (2000) Oncogene 19, 5598-5605.
  7. Rahimi, N. et al. (2000) J. Biol. Chem. 275, 16986-16992.
  8. Claesson-Welsh, L. (2003) Biochem. Soc. Trans. 31, 20-24.

Application References

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Companion Products

Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.

This product is for in vitro research use only and is not intended for use in humans or animals. This product is not intended for use as therapeutic or in diagnostic procedures.

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