Phospho-Chk2 (Thr68) (E8Q1A) Rabbit mAb (PE Conjugate) #59068
- F
Supporting Data
| REACTIVITY | H |
| SENSITIVITY | Endogenous |
| MW (kDa) | |
| Source/Isotype | Rabbit IgG |
Application Key:
- F-Flow Cytometry
Species Cross-Reactivity Key:
- H-Human
Product Information
Product Description
Product Usage Information
| Application | Dilution |
|---|---|
| Flow Cytometry (Fixed/Permeabilized) | 1:50 |
Storage
Protocol
Specificity / Sensitivity
Phospho-Chk2 (Thr68) (E8Q1A) Rabbit mAb (PE Conjugate) recognizes endogenous levels of Chk2 protein only when phosphorylated at Thr68. Non-specific non-nuclear staining was observed in smooth and skeletal muscle by immunohistochemistry.
Species Reactivity:
Human
Source / Purification
Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr68 of human Chk2 protein.
Background
Chk2 is the mammalian orthologue of the budding yeast Rad53 and fission yeast Cds1 checkpoint kinases (1-3). The amino-terminal domain of Chk2 contains a series of seven serine or threonine residues (Ser19, Thr26, Ser28, Ser33, Ser35, Ser50, and Thr68) each followed by glutamine (SQ or TQ motif). These are known to be preferred sites for phosphorylation by ATM/ATR kinases (4,5). After DNA damage by ionizing radiation (IR), UV irradiation, or hydroxyurea treatment, Thr68 and other sites in this region become phosphorylated by ATM/ATR (5-7). The SQ/TQ cluster domain, therefore, seems to have a regulatory function. Phosphorylation at Thr68 is a prerequisite for the subsequent activation step, which is attributable to autophosphorylation of Chk2 at residues Thr383 and Thr387 in the activation loop of the kinase domain (8).
- Allen, J.B. et al. (1994) Genes Dev. 8, 2401-2415.
- Weinert, T.A. et al. (1994) Genes Dev. 8, 652-665.
- Murakami, H. and Okayama, H. (1995) Nature 374, 817-819.
- Kastan, M.B. and Lim, D.S. (2000) Nat. Rev. Mol. Cell Biol. 1, 179-186.
- Matsuoka, S. et al. (2000) Proc. Natl. Acad. Sci. USA 97, 10389-10394.
- Melchionna, R. et al. (2000) Nat. Cell Biol. 2, 762-765.
- Ahn, J.Y. et al. (2000) Cancer Res. 60, 5934-5936.
- Lee, C.H. and Chung, J.H. (2001) J. Biol. Chem. 276, 30537-30541.
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