Phospho-VASP (Ser157) Antibody

3111:

IHC / Paraffin , Western Blotting

Phospho-VASP (Ser157) Antibody detects endogenous levels of VASP only when phosphorylated at serine 157. The antibody may cross-react with the phosphorylated VASP homologue Mena.

Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser157 of human VASP. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western blot analysis of extracts from NIH/3T3 and C6 cells, untreated, 8-Br-cGMP-treated, 8-Br-cAMP-treated or forskolin-treated as indicated, using Phospho-VASP (Ser157) Antibody.

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human tonsil, showing cytoplasmic localization, using Phospho-VASP (Ser157) Antibody.

Vasodilator-stimulated phosphoprotein (VASP) was originally characterized as a substrate of both cGMP- and cAMP-dependent kinases (PKG and PKA, or cGPK and cAPK, respectively) (1). It is now believed that VASP belongs to the Ena/VASP family of adaptor proteins linking the cytoskeletal system to the signal transduction pathways and that it functions in cytoskeletal organization, fibroblast migration, platelet activation and axon guidance (2,3). Three phosphorylation sites, Ser157, Ser239, and Thr278, have been identified. Ser239 is the major PKG phosphorylation site while Ser157 is the major PKA phosphorylation site (4). Evidence suggests that VASP phosphorylation reduces its association with actin and has a negative effect on actin polymerization (5). Phosphorylation at Ser239 of VASP is a useful marker for monitoring PKG activation and signaling (6,7).

1. Butt, E. et al. (1994) J. Biol. Chem. 269, 14509-14517.
2. Ball, L.J. et al. (2000) EMBO J. 19, 4903-4914.
3. Machesky, L.M. et al. (2000) Cell 101, 685-688.
4. Smolenski, A. et al. (1998) J. Biol. Chem. 273, 20029-20035.
5. Harbeck, B. et al. (2000) J. Biol. Chem. 275, 30817-30825.
6. Oelze, M. et al. (2000) Circ. Res. 87, 999-1005.
7. Lawrence, D.W. et al. (2001) J. Immunol. 166, 5550-5556.

• Howe, A. K. et al. (2002) Regulation of vasodilator-stimulated phosphoprotein phosphorylation and interaction with Abl by protein kinase A and cell adhesion. J. Biol. Chem. 277 (41), 38121-38126. Applications: Western Blotting
• López De Jesús, M. et al. (2006) J Biol Chem 281, 21837-47. Applications: Western Blotting
• Wentworth, J.K. et al. (2006) Biochem J 393, 555-64. Applications: Western Blotting
• Chen, H. et al. (2008) J Biol Chem 283, 4439-47. Applications: Western Blotting
• Bilodeau, M.L. and Hamm, H.E. (2007) J Pharmacol Exp Ther 322, 778-88. Applications: Western Blotting
• Gonzalez, A.M. et al. (2008) J Biol Chem 283, 31849-60. Applications: Western Blotting
• Forrester, M.T. et al. (2011) Biotechniques 50, 41-5. Applications: Western Blotting

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

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For Research Use Only. Not For Use In Diagnostic Procedures.