Revision 4

#83375Store at -20C

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, IP, ChIP, ChIP-seq

REACTIVITY:

H M R Mk

SENSITIVITY:

Endogenous

MW (kDa):

200, 110

Source/Isotype:

Rabbit IgG

UniProt ID:

#O60885-3, #O60885, #O60885-2

Entrez-Gene Id:

23476

Product Information

Product Usage Information

For optimal ChIP and ChIP-seq results, use 5 μl of antibody and 10 μg of chromatin (approximately 4 x 106 cells) per IP. This antibody has been validated using SimpleChIP® Enzymatic Chromatin IP Kits.
Application Dilution
Western Blotting 1:1000
Immunoprecipitation 1:100
Chromatin IP 1:100
Chromatin IP-seq 1:100

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

BRD4 (pan) (E1Y1P) Rabbit mAb recognizes endogenous levels of total BRD4 protein. This antibody detects endogenous BRD4 IsoA and BRD4 IsoC, and BRD4 IsoB when overexpressed. This antibody also detects bands of unknown origin at around 78 and 76 kDa.

Species Reactivity:

Human, Mouse, Rat, Monkey

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro53 of human BRD4 protein.

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 re-activation 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).

  1. Belkina, A.C. and Denis, G.V. (2012) Nat Rev Cancer 12, 465-77.
  2. Voigt, P. and Reinberg, D. (2011) Genome Biol 12, 133.
  3. Wu, S.Y. and Chiang, C.M. (2007) J Biol Chem 282, 13141-5.
  4. Dey, A. et al. (2003) Proc Natl Acad Sci U S A 100, 8758-63.
  5. Dey, A. et al. (2009) Mol Biol Cell 20, 4899-909.
  6. Zhao, R. et al. (2011) Nat Cell Biol 13, 1295-304.
  7. Jang, M.K. et al. (2005) Mol Cell 19, 523-34.
  8. Yang, Z. et al. (2005) Mol Cell 19, 535-45.
  9. Dawson, M.A. et al. (2011) Nature 478, 529-33.
  10. Muller, S. et al. (2011) Expert Rev Mol Med 13, e29.
  11. Mertz, J.A. et al. (2011) Proc Natl Acad Sci U S A 108, 16669-74.
  12. Filippakopoulos, P. et al. (2010) Nature 468, 1067-73.
  13. Nicodeme, E. et al. (2010) Nature 468, 1119-23.

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

WB: Western Blotting IP: Immunoprecipitation ChIP: Chromatin IP ChIP-seq: Chromatin IP-seq

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

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
SimpleChIP is a registered trademark of Cell Signaling Technology, Inc.
XP 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.

使用に関する制限

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Revision 4
#83375

BRD4 (pan) (E1Y1P) Rabbit mAb

Western Blotting Image 1: BRD4 (pan) (E1Y1P) Rabbit mAb Expand Image
Western blot analysis of extracts from 293T cells, either mock transfected (-) or transfected (+) with a construct expressing Myc/DDK-tagged full-length human BRD4 IsoB protein (hBRD4IsoB-Myc/DDK) or Myc/DDK-tagged full-length human BRD4 IsoC protein (hBRD4IsoC-Myc/DDK), using BRD4 (pan) (E1Y1P) Rabbit mAb (upper) and DYKDDDDK Tag (D6WB) Rabbit mAb (Binds to same epitope as Sigma's Anti-FLAG® M2 Antibody) #14793 (lower).
Western Blotting Image 2: BRD4 (pan) (E1Y1P) Rabbit mAb Expand Image
Western blot analysis of extracts from 293T cells, mock transfected or transfected with BRD4 siRNA, and extracts from Jurkat, Caki-1, and NIH/3T3 cells using BRD4 (pan) (E1Y1P) Rabbit mAb (upper) or α-Actinin (D6F6) XP® Rabbit mAb #6487 (lower). As expected, reduced signal is observed in 293T cells transfected with BRD4 siRNA.
Immunoprecipitation Image 1: BRD4 (pan) (E1Y1P) Rabbit mAb Expand Image
Immunoprecipitation of BRD4 protein from 293T cell extracts. Lane 1 is 10% input, lane 2 is Rabbit (DA1E) mAb IgG XP® Isotype Control #3900, and lane 3 is BRD4 (pan) (E1Y1P) Rabbit mAb. Western blot analysis was performed using BRD4 (pan) (E1Y1P) Rabbit mAb. Anti-rabbit IgG, HRP-linked Antibody #7074 was used as a secondary antibody.
Chromatin Immunoprecipitation Image 1: BRD4 (pan) (E1Y1P) Rabbit mAb Expand Image
Chromatin immunoprecipitations were performed with cross-linked chromatin from untreated MV-4-11 cells and BRD4 (pan) (E1Y1P) Rabbit mAb, using SimpleChIP® Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. DNA Library was prepared using DNA Library Prep Kit for Illumina Systems (ChIP-seq, CUT&RUN) #56795. The figure shows binding across CCDC26 gene.
Chromatin Immunoprecipitation Image 2: BRD4 (pan) (E1Y1P) Rabbit mAb Expand Image
Chromatin immunoprecipitations were performed with cross-linked chromatin from untreated MV-4-11 cells and BRD4 (pan) (E1Y1P) Rabbit mAb, using SimpleChIP® Plus Enzymatic Chromatin IP Kit (Magnetic Beads) #9005. DNA Library was prepared using DNA Library Prep Kit for Illumina Systems (ChIP-seq, CUT&RUN) #56795. The figures show binding across chromosome 8 (upper), including CCDC26 gene (lower).
Chromatin Immunoprecipitation Image 3: BRD4 (pan) (E1Y1P) Rabbit mAb Expand Image
Chromatin immunoprecipitations were performed with cross-linked chromatin from MV-4-11 cells and either BRD4 (pan) (E1Y1P) Rabbit mAb 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 c-Myc Intron 1 Primers #14905, SimpleChIP® Human Bcl-2 Promoter Primers #12924, 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.