Product Pathways - Lymphocyte Signaling
Phospho-SHIP1 (Tyr1020) Antibody #3941
| Applications | Reactivity | MW (kDa) | Source |
|---|---|---|---|
| W | H M | 145 | Rabbit |
Applications Key:
W=Western Blotting
Reactivity Key:
H=Human
M=Mouse
Species enclosed in parentheses are predicted to react based on 100% sequence homology. Species cross-reactivity is determined by Western blot.
Specificity / Sensitivity
Phospho-SHIP1 (Tyr1021) Antibody detects endogenous levels of SHIP1 only when phosphorylated at tyrosine 1020 of mouse SHIP1 (or Tyr1021 of human SHIP1).
Source / Purification
Polyclonal antibodies are produced by immunizing rabbits with a synthetic phospho-peptide (KLH-coupled) corresponding to residues around Tyr1020 of mouse SHIP. Antibodies are purified by protein A and peptide affinity chromatography.
Western Blotting
Western blot analysis of extracts from Ramos cells (human), untreated or IgM-treated (12 µg/ml for 2 minutes) and mouse spleenocytes, untreated or IgG-treated (30 µg/ml), using Phospho-SHIP1 (Tyr1020) Antibody.
Background
SH2-containing inositol phosphatase 1 (SHIP1) is a hematopoietic phosphatase that hydrolyzes phosphatidylinositol-3,4,5-triphosphate to phosphatidylinositol-3,4-bisphosphate (1). SHIP1 is a cytosolic phosphatase with an SH2 domain in its amino terminus and two NPXY Shc binding motifs in its carboxy terminus (1,2). Upon receptor cross-linking, SHIP is first recruited to the membrane junction through binding of its SH2 domain to the phospho-tyrosine in the ITIM motif (2), followed by tyrosine phosphorylation on the NPXY motif (2). The membrane relocalization and phosphorylation on the NPXY motif is essential for the regulatory function of SHIP1 (3-5). Its effect on calcium flux, cell survival, growth, cell cycle arrest and apoptosis is mediated through the PI3K and Akt pathways (3-5). Tyrosine 1021 is located in one of the NPXY motifs in SHIP1, and its phosphorylation is important for SHIP1 function (6).
- Tridandapani, S. et al. (1997) Mol Cell Biol 17, 4305-11.
- Liu, L. et al. (1997) J Biol Chem 272, 8983-8.
- Malbec, O. et al. (2001) J Biol Chem 276, 30381-91.
- Carver, D.J. et al. (2000) Blood 96, 1449-56.
- Scharenberg, A.M. et al. (1998) EMBO J 17, 1961-72.
- Sattler, M. et al. (2001) J Biol Chem 276, 2451-8.
Application References
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