CBX2 Antibody #18687
- WB
- ChIP
Supporting Data
| REACTIVITY | H M R Mk |
| SENSITIVITY | Endogenous |
| MW (kDa) | 70 |
| SOURCE | Rabbit |
Application Key:
- WB-Western Blotting
- ChIP-Chromatin Immunoprecipitation
Species Cross-Reactivity Key:
- H-Human
- M-Mouse
- R-Rat
- Mk-Monkey
Product Information
Product Usage Information
| Application | Dilution |
|---|---|
| Western Blotting | 1:1000 |
| Chromatin IP | 1:50 |
Storage
Protocol
Specificity / Sensitivity
CBX2 Antibody recognizes endogenous levels of total CBX2 protein.
Species Reactivity:
Human, Mouse, Rat, Monkey
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ala100 of human CBX2 protein. Antibodies are purified by peptide affinity chromatography.
Background
The polycomb group (PcG) proteins contribute to the maintenance of cell identity, stem cell self-renewal, cell cycle regulation, and oncogenesis by maintaining the silenced state of genes that promote cell lineage specification, cell death, and cell-cycle arrest (1-4). PcG proteins exist in two complexes that cooperate to maintain long-term gene silencing through epigenetic chromatin modifications. The first complex, EED-EZH2, is recruited to genes by DNA-binding transcription factors and methylates histone H3 on Lys27. This histone methyl-transferase activity requires the Ezh2, Eed, and Suz12 subunits of the complex (5). Histone H3 methylation at Lys27 facilitates the recruitment of the second complex, PRC1, which ubiquitinylates histone H2A on Lys119 (6). Chromobox protein homolog 2 (CBX2) is a core component of the PRC1 complex, which binds to the H3K27me3 mark and recruits PRC1 for transcriptional repression (7). CBX2 is frequently overexpressed in various cancers, including breast, ovarian, and AR-independent prostate cancer, where it is associated with poor prognosis (8-14). Furthermore, elevated CBX2 expression levels correlate with larger tumor size, increased lymph node metastasis, and positive human epidermal growth factor receptor 2 (HER-2) status in breast cancer (8). Mutations in CBX2 have also been attributed to 46,XY disorders of sex development (DSD), at least partially due to misregulation of the NR5A1/SF1 gene (15,16).
- Boyer, L.A. et al. (2006) Nature 441, 349-53.
- Lee, T.I. et al. (2006) Cell 125, 301-13.
- Park, I.K. et al. (2003) Nature 423, 302-5.
- Molofsky, A.V. et al. (2003) Nature 425, 962-7.
- Tavares, L. et al. (2012) Cell 148, 664-78.
- Gao, Z. et al. (2012) Mol Cell 45, 344-56.
- Kaustov, L. et al. (2011) J Biol Chem 286, 521-9.
- Chen, W.Y. et al. (2017) Oncol Lett 13, 1149-1156.
- Liang, Y.K. et al. (2017) Oncotarget 8, 92375-92387.
- Piqué, D.G. et al. (2019) Br J Cancer 120, 746-753.
- Zheng, S. et al. (2019) Am J Transl Res 11, 1668-1682.
- Iqbal, M.A. et al. (2021) Mol Oncol 15, 1450-1465.
- Wheeler, L.J. et al. (2018) Oncogenesis 7, 92.
- Clermont, P.L. et al. (2016) Clin Epigenetics 8, 16.
- Biason-Lauber, A. et al. (2009) Am J Hum Genet 84, 658-63.
- Sproll, P. et al. (2019) Sci Rep 9, 16552.
Limited Uses
Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.
Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.