|Other Names||Bromodomain-containing protein 4, Protein HUNK1, BRD4, HUNK1|
|Format||Synthetic peptide was lyophilized with 100% acetonitrile and is supplied as a powder. Reconstitute with 0.1 ml DI water for a final concentration of 1 mg/ml.|
|Storage||Maintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C.|
|Precautions||This product is for research use only. Not for use in diagnostic or therapeutic procedures.|
|Function||Chromatin reader protein that recognizes and binds acetylated histones and plays a key role in transmission of epigenetic memory across cell divisions and transcription regulation. Remains associated with acetylated chromatin throughout the entire cell cycle and provides epigenetic memory for postmitotic G1 gene transcription by preserving acetylated chromatin status and maintaining high-order chromatin structure. During interphase, plays a key role in regulating the transcription of signal-inducible genes by associating with the P- TEFb complex and recruiting it to promoters: BRD4 is required to form the transcriptionally active P-TEFb complex by displacing negative regulators such as HEXIM1 and 7SKsnRNA complex from P- TEFb, thereby transforming it into an active form that can then phosphorylate the C-terminal domain (CTD) of RNA polymerase II. Promotes phosphorylation of 'Ser-2' of the C-terminal domain (CTD) of RNA polymerase II. According to a report, directly acts as an atypical protein kinase and mediates phosphorylation of 'Ser-2' of the C-terminal domain (CTD) of RNA polymerase II; these data however need additional evidences in vivo (PubMed:22509028). In addition to acetylated histones, also recognizes and binds acetylated RELA, leading to further recruitment of the P-TEFb complex and subsequent activation of NF-kappa-B. Also acts as a regulator of p53/TP53-mediated transcription: following phosphorylation by CK2, recruited to p53/TP53 specific target promoters.|
|Cellular Location||Nucleus. Chromosome. Note=Associates with acetylated chromatin. Released from chromatin upon deacetylation of histones that can be triggered by different signals such as activation of the JNK pathway or nocodazole treatment|
|Tissue Location||Ubiquitously expressed.|
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The protein encoded by this gene is homologous to themurine protein MCAP, which associates with chromosomes duringmitosis, and to the human RING3 protein, a serine/threonine kinase.Each of these proteins contains two bromodomains, a conservedsequence motif which may be involved in chromatin targeting. Thisgene has been implicated as the chromosome 19 target oftranslocation t(15;19)(q13;p13.1), which defines an upperrespiratory tract carcinoma in young people. Two alternativelyspliced transcript variants have been described. [provided byRefSeq].
Reynoird, N., et al. EMBO J. 29(17):2943-2952(2010)Dow, E.C., et al. J. Cell. Physiol. 224(1):84-93(2010)Yan, J., et al. J. Virol. 84(1):76-87(2010)Weidner-Glunde, M., et al. Front. Biosci. 15, 537-549 (2010) :You, J., et al. Mol. Cell. Biol. 29(18):5094-5103(2009)
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