Revision 1
#18687
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For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:
W, ChIP
Reactivity:
H M R Mk
Sensitivity:
Endogenous
MW (kDa):
70
Source/Isotype:
Rabbit
UniProt ID:
#Q14781
Entrez-Gene Id:
84733
Product Usage Information
Application | Dilution |
---|---|
Western Blotting | 1:1000 |
Chromatin IP | 1:50 |
Storage
Specificity/Sensitivity
CBX2 Antibody recognizes endogenous levels of total CBX2 protein.
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).
Background References
- 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.
Species Reactivity
Species reactivity is determined by testing in at least one approved application (e.g., western blot).
Western Blot Buffer
IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.
Applications Key
W: Western Blotting ChIP: Chromatin IP
Cross-Reactivity Key
H: Human M: Mouse R: Rat Hm: Hamster Mk: Monkey Vir: Virus Mi: Mink C: Chicken Dm: D. melanogaster X: Xenopus Z: Zebrafish B: Bovine Dg: Dog Pg: Pig Sc: S. cerevisiae Ce: C. elegans Hr: Horse GP: Guinea Pig Rab: Rabbit G: Goat All: All Species Expected
Trademarks and Patents
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
SimpleChIP is a registered trademark of Cell Signaling Technology, Inc.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.
Limited Uses
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Revision 1
#18687
CBX2 Antibody
Western blot analysis of extracts from various cell lines using CBX2 Antibody (upper) or β-Actin (D6A8) Rabbit mAb #8457 (lower).
Western blot analysis of extracts from various cell lines using CBX2 Antibody.
Chromatin immunoprecipitations were performed with cross-linked chromatin from NCCIT cells and either CBX2 Antibody or Normal Rabbit IgG #2729 using SimpleChIP® Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. The enriched DNA was quantified by real-time PCR using SimpleChIP® Human HoxA1 Intron 1 Primers #7707, SimpleChIP® Human HoxA2 Promoter Primers #5517, and SimpleChIP® Human α Satellite Repeat Primers #4486. The amount of immunoprecipitated DNA in each sample is represented as signal relative to the total amount of input chromatin, which is equivalent to one.