Cell Signaling Technology

Product Pathways - Tyrosine Kinase/ Adaptors

Phospho-VEGF Receptor 2 (Tyr951) (15D2) Rabbit mAb #4991

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

Applications Key:  W=Western Blotting  IHC-P=Immunohistochemistry (Paraffin)
Reactivity Key:  H=Human  M=Mouse
Species cross-reactivity is determined by Western blot.

Protocols

Specificity / Sensitivity

Phospho-VEGF Receptor 2 (Tyr951) (15D2) Rabbit Monoclonal Antibody detects transfected levels of VEGF receptor 2 only when phosphorylated at Tyr951. The antibody may slightly cross-react with activated VEGF receptor 1, but not with other related tyrosine phosphorylated tyrosine kinases.

Source / Purification

Monoclonal antibodies are produced by immunizing rabbits with a synthetic phospho-peptide (KLH-coupled) corresponding to residues surrounding Tyr951 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 (Tyr951) (15D2) Rabbit mAb (upper) and VEGF Receptor 2 Antibody # 2472 (lower).

Western Blotting

Western Blotting

Phospho-VEGF Receptor 2 (Tyr951) (15D2) 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 (Tyr951) (15D2) Rabbit mAb (upper) or Phospho-Tyrosine Mouse mAb (P-Tyr-100) #9411 (lower). CKR/PAE cells (lanes 13 and 14) express chimeric receptors containing human CSF-1 extracellular binding domain/mouse VEGF receptor-2 intracellular domain (5). CSF-1 stimulates phosphorylation of Tyr951 of intracellular VEGF receptor-2 domain (lane 13) , which was specifically detected by Phospho-VEGF Receptor-2 (Tyr951) (15D2) Rabbit mAb.

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded HUVEC cells, untreated (left) or VEGF-treated (right), using Phospho-VEGF Receptor-2 (Tyr951) (15D2) 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

Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!

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.

Products