- 1503310 (See other available formats)
- Regulatory Status
- Other Names
- Phospho Zeta-Chain (TCR) Associated Protein Kinase 70 kD, Phospho SRK, Phospho 70 KD Zeta-Chain Associated Protein, Phospho Tyrosine-protein kinase ZAP-70
- Mouse IgG1, κ
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- Product Citations
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ZAP70 was identified in TCR-stimulated Jurkat cells. It is an inactive cytosolic tyrosine kinase that is recruited to a transmembrane receptor lacking intrinsic catalytic activity. ZAP70 and the related spleen tyrosine kinase (Syk) play a critical role in T-cell development and activation. This enzyme, which is phosphorylated on tyrosine residues upon T-cell antigen receptor (TCR) stimulation, functions in the initial step of TCR-mediated signal transduction in combination with the Src family kinases, Lck and Fyn.
ZAP70 activation can be regulated by binding to phosphorylated ITAMs of the TCR and by phosphorylation of multiple tyrosine residues on ZAP70. Phosphorylation of Tyr-315 and Tyr-319 are essential for ZAP70 positive regulation of T-lymphocyte activation whereas Tyr-292 has a negative regulatory role.
Phosphorylated Y319 is a positive regulator of ZAP70, which triggers the binding of Lck and activation of NFAT and IL-2 induction. The binding of Lck to phosphorylated Y319 promotes Lck mediated phosphorylation of Y493, and facilitates activation of downstream signaling. The importance of Y319 phosphorylation in positive regulation of ZAP70 was confirmed in a mouse model with Y319F ZAP70 mutant expression, which resulted in severe defects in calcium mobilization and thymocyte selection.Product Details
- Antibody Type
- Host Species
- Modified peptide.
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
- The antibody was purified by affinity chromatography.
- 0.5 mg/ml
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C.
WB - Quality tested
ICC, ICFC - Verified
- Recommended Usage
Each lot of this antibody is quality control tested by Western blotting. For Western blotting, the suggested use of this reagent is 0.5 - 2.5 µg/ml. For immunofluorescence microscopy, a concentration range of 0.5 - 2.5 μg/ml is recommended. For intracellular flow cytometry using our True-Phos™ Perm Buffer, the suggested use of this reagent is 5 µl per million cells or 5 µl per 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.
- Application Notes
This antibody can also weakly react with Syk Phospho (Tyr352) on WB.
AB_2572026 (BioLegend Cat. No. 683702)
- 619 amino acids with a predicted molecular weight of 70 kD.
Cytoplasm and cell membrane.
- Required for the assembly of a Zap-70-containing signaling complex. Activation of the PLC-g1-dependent and Ras-dependent signaling cascades. Association with PLC-g1.
- NFAM1, SLA and SLA2, CBLB, DEF6, FCRL3, VAV1, and CD247/CD3Z.
- Cell Type
- B cells
- Biology Area
- Cell Biology, Immunology, Signal Transduction
- Molecular Family
- Phospho-Proteins, Protein Kinases/Phosphatase, TCRs
- Antigen References
1. Chan AC, et al. 1991. Proc. Natl. Acad. Sci. 88:9166.
2. Arpaia E, et al. 1994. Cell 76:947.
3. Chan AC, et al. 1994. Science 264:1599.
4. Negishi I, et al. 1995. Nature 376:435.
5. Wang H, et al. 2010. Cold Spring Harb. Perspect. Biol. 2:a002279.
6. Klammt C, et al. 2015. Nat. Immunol. 16:961.
7. Weiss A. 1993. Cell 73:209.
8. Gong Q, et al. 2001. J. Exp. Med. 194:507.
- Gene ID
- 7535 View all products for this Gene ID
- View information about ZAP-70 Phospho Tyr319 Syk Phospho Tyr352 on UniProt.org
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