Cell Signaling Technology
XP Monoclonal Antibody

Product Pathways - Jak/Stat Pathway

Phospho-Stat5 (Tyr694) (D47E7) XP® Rabbit mAb #4322

Applications Reactivity Sensitivity MW (kDa) Isotype
W IF-IC F H M (R) (Mk) (B) Endogenous 90 Rabbit IgG

Applications Key:  W=Western Blotting  IF-IC=Immunofluorescence (Immunocytochemistry)  F=Flow Cytometry
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey  B=Bovine
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

* Product-specific protocol.

Specificity / Sensitivity

Phospho-Stat5 (Tyr694) (D47E7) XPTM Rabbit mAb detects endogenous levels of Stat5a only when phosphorylated at Tyr694 and Stat5b when phosphorylated at Tyr699.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Tyr694 of human Stat5a protein.

Western Blotting

Western Blotting

Western blot analysis of extracts from UT-7 cells, untreated or treated with erythropoietin (EPO; 3 units/ml for 5 min), TF-1 cells, untreated or treated with Human Granulocyte Macrophage Colony Stimulating Factor #8922 (hGM-CSF; 100ng/ml for 10 min), and NK-92 cells, untreated or treated with Human Interleukin-2 #8907 (hIL-2; 100ng/ml for 10 min), using Phospho-Stat5 (Tyr694) (D47E7) XP® Rabbit mAb (upper) or total Stat5 (3H7) Rabbit mAb #9358 (lower).

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of TF-1 cells, untreated (blue) or GM-CSF treated (green), using Phospho-Stat5 (Tyr694) (D47E7) XP® Rabbit mAb.

IF-IC

IF-IC

Confocal immunofluorescent analysis of A-431 cells, EGF-treated (left) or untreated (right), using Phospho-Stat5 (Tyr694) XP®(D47E7) Rabbit mAb (green) and Pan-Keratin (C11) Mouse mAb #4545 (red).


Background

Stat5 is activated in response to a wide variety of ligands including IL-2, GM-CSF, growth hormone and prolactin. Phosphorylation at Tyr694 is obligatory for Stat5 activation (1,2). This phosphorylation is mediated by Src upon erythropoietin stimulation (3). Stat5 is constitutively active in some leukemic cell types (4). Phosphorylated Stat5 is found in some endothelial cells treated with IL-3, which suggests its involvement in angiogenesis and cell motility (5). Stat5a and Stat5b are independently regulated and activated in various cell types. For instance, interferon treatment predominantly activates Stat5a in U-937 cells and Stat5b in HeLa cells (6).

  1. Gouilleux, F. et al. (1994) EMBO J. 13, 4361-4369.
  2. Wakao, H. et al. (1994) EMBO J. 13, 2182-2191.
  3. Okutani, Y. et al. (2001) Oncogene 20, 6643-6650.
  4. Demoulin, J.B. et al. (1999) J. Biol. Chem. 274, 25855-25861.
  5. Dentelli, P. et al. (1999) J. Immunol. 163, 2151-2159.
  6. Meinke, A. et al. (1996) Mol. Cell. Biol. 16, 6937-6944.

Application References

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Companion Products

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

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