WB, IP
H M R Mk
Endogenous
145
Rabbit
#P18433
5786
Product Information
Product Usage Information
| Application | Dilution |
|---|---|
| Western Blotting | 1:1000 |
| Immunoprecipitation | 1:50 |
Storage
Specificity / Sensitivity
Species Reactivity:
Human, Mouse, Rat, Monkey
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Tyr789 of human PTPα. Antibodies are purified by protein A and peptide affinity chromatography.
Background
PTPα (PTPRA) is a transmembrane receptor tyrosine phosphatase implicated in the regulation of Src family kinases during the G2 to mitosis entry point. Two identified splice variants differ in the size of the extracellular region; the shorter form appears to be ubiquitously expressed while the larger protein is more limited in distribution (1). The cytoplasmic region of PTPα contains two putative catalytic domains. One phosphatase domain (D1) exhibits catalytic activity while the other (D2) may regulate phosphatase activity by allowing receptor dimer formation (2,3). PTPα is a physiological regulator of Src and Src family kinases (4). Constitutive phosphorylation of the carboxy-terminal Tyr789 of PTPα is essential for dephosphorylation of Src at Tyr527. Phosphorylation of PTPα at this residue also allows binding of the Grb2 inhibitor, restricting PTPα activation of Src (5,6). PKC-mediated phosphorylation of the PTP at Ser180 and Ser204 also increases PTPα phosphatase activity (7).
- Kapp, K. et al. (2007) Genes Cells 12, 63-73.
- Blanchetot, C. et al. (2002) J Biol Chem 277, 47263-9.
- Krueger, N.X. et al. (1990) EMBO J 9, 3241-52.
- den Hertog, J. et al. (1993) EMBO J 12, 3789-98.
- Zheng, X.M. et al. (2000) EMBO J 19, 964-78.
- Zheng, X.M. et al. (2002) J Biol Chem 277, 21922-9.
- Tracy, S. et al. (1995) J Biol Chem 270, 10587-94.
Species Reactivity
Species reactivity is determined by testing in at least one approved application (e.g., western blot).
Western Blot Buffer
IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.
Applications Key
WB: Western Blotting IP: Immunoprecipitation
Cross-Reactivity Key
H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected
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