| Product Includes | Product # | Quantity | Color | Storage Temp |
|---|---|---|---|---|
| BRD4 Rabbit mAb Coated Microwells | 98620 | 96 tests |
|
+4C |
| BRD4 Rabbit Detection mAb | 20320 | 1 ea |
|
+4C |
| HRP Diluent | 13515 | 5.5 ml |
|
+4C |
| TMB Substrate | 7004 | 11 ml |
|
+4C |
| STOP Solution | 7002 | 11 ml |
|
+4C |
| Sealing Tape | 54503 | 2 ea |
|
+4C |
| ELISA Wash Buffer (20X) | 9801 | 25 ml |
|
+4C |
| Cell Lysis Buffer (10X) | 9803 | 15 ml |
|
-20C |
*The microwell plate is supplied as 12 8-well modules - Each module is designed to break apart for 8 tests.
Description
The rapid protocol (RP) PathScan® RP BRD4 Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of BRD4 protein in a reduced assay time of 1.5 hours. Incubation of cell lysates and detection antibody on the coated microwell plate forms a sandwich with BRD4 protein in a single step. The plate is then extensively washed and TMB reagent is added for signal development. The magnitude of absorbance for the developed color is proportional to the quantity of BRD4 protein. Learn more about your ELISA kit options here.
*Antibodies in this kit are custom formulations specific to kit.
Specificity/Sensitivity
Background
Bromodomain-containing protein 4 (BRD4) is a member of the bromodomains and extra terminal (BET) family of proteins, which also includes BRD2, BRD3, and BRDT (1-3). BET family proteins contain two tandem bromodomains and an extra terminal (ET) domain, and bind acetyl lysine residues (3). BRD4 is a chromatin-binding protein with a preference for Lys14 on histone H3 as well as Lys5 and Lys12 on histone H4 (4). BRD4 chromatin binding occurs throughout the cell cycle, including condensed mitotic chromosomes, when the majority of genes are silenced (5). BRD4 association with chromatin during mitosis is thought to be an important part of the bookmarking mechanism to accelerate reactivation of the silenced genes upon exit from mitosis (2,6). BRD4 has been shown to facilitate transcription by recruiting the positive transcription elongation factor b (pTEFb) complex that phosphorylates Ser2 of the heptapeptide repeat of the carboxy-terminal domain of RNA polymerase II, promoting transcription elongation (3,7,8). In addition, BRD4 has been found to be part of the super elongation complex and the polymerase associated factor complex (PAFc) in MLL-fusion derived leukemia cell lines, demonstrating a role for BRD4 in the regulation of transcription elongation (9). Research studies have shown that BRD4 (and BET family proteins) may be promising therapeutic targets for various Myc-driven cancers, such as Burkitt’s lymphoma and certain acute myeloid leukemias (1,10,11). Investigators have found molecular inhibition of BET proteins to be effective in inducing apoptosis in various MLL-fusion driven leukemic cell lines by competing BRD3 and BRD4 from chromatin, leading to reduced expression of Bcl-2, Myc, and CDK6 (9). BET inhibition has also been shown to have antitumor activities against nuclear protein in testis (NUT) midline carcinoma cell lines and xenografts in mice where BRD4 is found to be a frequent translocation partner of the NUT protein (12). In addition, BRD4 regulates the expression of some inflammatory genes, and inhibition of BRD4 (and BET family proteins) chromatin binding causes reduced expression of a subset of inflammatory genes in macrophages, leading to protection against endotoxic shock and sepsis (13).
- Belkina, A.C. and Denis, G.V. (2012) Nat Rev Cancer 12, 465-77.
- Voigt, P. and Reinberg, D. (2011) Genome Biol 12, 133.
- Wu, S.Y. and Chiang, C.M. (2007) J Biol Chem 282, 13141-5.
- Dey, A. et al. (2003) Proc Natl Acad Sci U S A 100, 8758-63.
- Dey, A. et al. (2009) Mol Biol Cell 20, 4899-909.
- Zhao, R. et al. (2011) Nat Cell Biol 13, 1295-304.
- Jang, M.K. et al. (2005) Mol Cell 19, 523-34.
- Yang, Z. et al. (2005) Mol Cell 19, 535-45.
- Dawson, M.A. et al. (2011) Nature 478, 529-33.
- Muller, S. et al. (2011) Expert Rev Mol Med 13, e29.
- Mertz, J.A. et al. (2011) Proc Natl Acad Sci U S A 108, 16669-74.
- Filippakopoulos, P. et al. (2010) Nature 468, 1067-73.
- Nicodeme, E. et al. (2010) Nature 468, 1119-23.
Background References
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 All: all species expected
Trademarks and Patents
Limited Uses
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