Product Pathways - Cell Cycle / Checkpoint
Phospho-Rb (Ser608) Antibody #2181
PhosphoSitePlus® protein, site, and accession data: Rb
| Applications | Reactivity | Sensitivity | MW (kDa) | Source |
|---|---|---|---|---|
| W IP | H R Mk (Dg) | Endogenous | 110 | Rabbit |
Applications Key:
W=Western Blotting
IP=Immunoprecipitation
Reactivity Key:
H=Human
R=Rat
Mk=Monkey
Dg=Dog
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.
Protocols
Specificity / Sensitivity
Phospho-Rb (Ser608) Antibody detects endogenous levels of Rb only when phosphorylated at serine 608.
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser608 of human Rb. Antibodies are purified by protein A and peptide affinity chromatography.
Western Blotting
Western blot analysis of extracts from HeLa cells treated with lambda Phosphatase NEB #P0753 (10,000 units/ml, 1 h) or calyculin A #9902 (100 nM, 10 min) using Phospho-Rb (Ser608) Antibody (upper) or Rb (4H1) Mouse mAb #9309 (lower).
Background
The retinoblastoma tumor suppressor protein, Rb, regulates cell proliferation by controlling progression through the restriction point within the G1-phase of the cell cycle (1). Rb has three functionally distinct binding domains and interacts with critical regulatory proteins including the E2F family of transcription factors, c-Abl tyrosine kinase, and proteins with a conserved LXCXE motif (2-4). Cell cycle-dependent phosphorylation by a CDK inhibits Rb target binding and allows cell cycle progression (5). Rb inactivation and subsequent cell cycle progression likely requires an initial phosphorylation by cyclin D-CDK4/6 followed by cyclin E-CDK2 phosphorylation (6). Specificity of different CDK/cyclin complexes has been observed in vitro (6-8) and cyclin D1 is required for Ser780 phosphorylation in vivo (9).
- Sherr, C.J. (1996) Science 274, 1672-7.
- Nevins, J.R. (1992) Science 258, 424-9.
- Welch, P.J. and Wang, J.Y. (1993) Cell 75, 779-90.
- Hu, Q.J. et al. (1990) EMBO J 9, 1147-55.
- Knudsen, E.S. and Wang, J.Y. (1997) Mol Cell Biol 17, 5771-83.
- Lundberg, A.S. and Weinberg, R.A. (1998) Mol Cell Biol 18, 753-61.
- Connell-Crowley, L. et al. (1997) Mol Biol Cell 8, 287-301.
- Kitagawa, M. et al. (1996) EMBO J 15, 7060-9.
- Geng, Y. et al. (2001) Proc Natl Acad Sci USA 98, 194-9.
Application References
- von Willebrand, M. et al. (2003) The tyrphostin AG1024 accelerates the degradation of phosphorylated forms of retinoblastoma protein (pRb) and restores pRb tumor suppressive function in melanoma cells. Cancer Res 63, 1420-1429. Applications: Western Blotting
Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!
Companion Products
- 9309 Rb (4H1) Mouse mAb
- 9301 Phospho-Rb (Ser795) Antibody
- 9308 Phospho-Rb (Ser807/811) Antibody
- 9307 Phospho-Rb (Ser780) 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
This product is intended for research purposes only. The product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
