Product Pathways - DNA Damage
Phospho-53BP1 (Ser25/29) Antibody #2674
|2674S||100 µl (10 western blots)||---||In Stock||---|
|2674||carrier free and custom formulation / quantity||email request|
Already purchased this product? Write a Review.
Species cross-reactivity is determined by western blot.
Applications Key: W=Western Blotting
Specificity / Sensitivity
Phospho-53BP1 (Ser25/29) Antibody detects endogenous levels of 53BP1 only when phosphorylated at serine 25/29.
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser25/29 of human 53BP1. Antibodies are purified by protein A and peptide affinity chromatography.
p53-binding protein 1 (53BP1) was originally identified as a p53 binding partner that could enhance the transcriptional activity of p53 (1,2). 53BP1 consists of two BRCA1 carboxy terminal (BRCT) domains that allow for binding to p53 and a separate domain responsible for binding to phosphorylated histone H2A.X (3). 53BP1 rapidly translocates to nuclear foci following treatment of cells with ionizing radiation (IR) or radiomimetic agents that cause DNA double strand breaks (DSBs) (4,5). Because of this localization to DSBs and homology to the yeast protein Rad9, a role for 53BP1 in DSB repair has been proposed. Recruitment of 53BP1 to sites of DNA damage has been demonstrated to be independent of ATM, NBS1, and DNA-PK (4) and retention of 53BP1 at DNA breaks requires phosphorylated H2A.X (6). In cells lacking 53BP1, phosphorylation of ATM substrates is reduced, suggesting that 53BP1 is upstream of ATM (7). In response to IR, phosphorylation of 53BP1 at serines 6, 25, 29, and 784 by ATM has been demonstrated, but phosphorylation at these sites is not required for localization of 53BP1 to sites of DSBs (6). Phosphorylation of 53BP1 at Ser1618 has been reported to be enriched in human cells arrested in mitosis (8).
- Iwabuchi, K. et al. (1994) Proc. Natl. Acad. Sci. USA 91, 6098-6102.
- Iwabuchi, K. et al. (1998) J. Biol. Chem. 273, 26061-26068.
- Mochan, T.A. et al. (2004) DNA Repair (Amst) 3, 945-952.
- Schultz, L.B. et al. (2000) J. Cell Biol. 151, 1381-1390.
- Anderson, L. et al. (2001) Mol. Cell. Biol. 21, 1719-1729.
- Ward, I.M. et al. (2003) J. Biol. Chem. 278, 19579-19582.
- DiTullio, R.A. et al. (2002) Nat. Cell Biol. 4, 998-1002.
- Dephoure, N. et al. (2008) Proc Natl Acad Sci U S A 105, 10762-7.
Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!
- 4937 53BP1 Antibody
- 2675 Phospho-53BP1 (Ser1778) Antibody
- 9286 Phospho-p53 (Ser15) (16G8) Mouse mAb
- 2524 p53 (1C12) Mouse mAb
- 2577 Phospho-Histone H2A.X (Ser139) Antibody
- 2661 Phospho-Chk2 (Thr68) Antibody
- 7071 Phototope®-HRP Western Blot Detection System, Anti-rabbit IgG, HRP-linked Antibody
- 7074 Anti-rabbit IgG, HRP-linked Antibody
- 7720 Prestained Protein Marker, Broad Range (Premixed Format)
- 7727 Biotinylated Protein Ladder Detection Pack
- 7003 20X LumiGLO® Reagent and 20X Peroxide
For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.