BRD4
BRD4 (Bromodomain Containing Protein 4) is a member of the BET (bromodomain and extra-terminal) protein family that recognizes acetylated histones and functions as a central regulator of chromatin-associated transcriptional programs[1][2]. Mechanistically, BRD4 promotes RNA polymerase II transcriptional elongation through functional interaction with positive transcription elongation factor b (P-TEFb), thereby facilitating productive gene expression and transcriptional pause release[3][4][5]. Beyond transcriptional control, BRD4 contributes to chromatin organization, DNA replication, and DNA damage response pathways, linking epigenetic regulation to genome stability[1][6]. BRD4 also supports efficient transcription elongation that limits R-loop accumulation and transcription-replication conflicts, processes that are important for maintaining cellular viability[6]. In disease contexts, aberrant BRD4 activity has been associated with cancer, inflammatory disorders, viral infection, and neurological disease, reflecting its broad influence on gene regulatory networks[1][2]. In multiple tumor models, BRD4 regulates transcriptional programs linked to oncogenic drivers and tumor cell survival, supporting its relevance as a therapeutic target[7][8]. Compared with related BET family members BRD2, BRD3, and the testis-restricted BRDT, BRD4 possesses a characteristic C-terminal domain that mediates interaction with P-TEFb and plays a distinct role in transcriptional elongation control[3][9]. For experimental applications, small-molecule BET inhibitors such as JQ1 and I-BET disrupt bromodomain-dependent chromatin interactions and have become widely used tools for investigating BRD4-dependent transcriptional mechanisms and target validation in disease models[1][7][8].
References:
- [1]. Cheung KL, et al. The Functions of BET Proteins in Gene Transcription of Biology and Diseases. Front Mol Biosci. 2021 Sep 3;8:728777. [Content Brief]
- [2]. Liang Y, et al. BRD4 in physiology and pathology: ''BET'' on its partners. Bioessays. 2021 Dec;43(12):e2100180. [Content Brief]
- [3]. Zheng B, et al. Distinct layers of BRD4-PTEFb reveal bromodomain-independent function in transcriptional regulation. Mol Cell. 2023 Aug 17;83(16):2896-2910.e4. [Content Brief]
- [4]. Altendorfer E, et al. BRD4: a general regulator of transcription elongation. Transcription. 2022 Feb-Jun;13(1-3):70-81. [Content Brief]
- [5]. Kanno T, et al. BRD4 assists elongation of both coding and enhancer RNAs by interacting with acetylated histones. Nat Struct Mol Biol. 2014 Dec;21(12):1047-57. [Content Brief]
- [6]. Edwards DS, et al. BRD4 Prevents R-Loop Formation and Transcription-Replication Conflicts by Ensuring Efficient Transcription Elongation. Cell Rep. 2020 Sep 22;32(12):108166. [Content Brief]
- [7]. Jung M, et al. Targeting BET bromodomains for cancer treatment. Epigenomics. 2015;7(3):487-501. [Content Brief]
- [8]. Lucas X, et al. 4-Acyl pyrroles: mimicking acetylated lysines in histone code reading. Angew Chem Int Ed Engl. 2013 Dec 23;52(52):14055-9. [Content Brief]
- [9]. Kargbo RB. PROTAC Degradation of Bromodomain for the Treatment of Hyperplasia and Cancer. ACS Med Chem Lett. 2019 Sep 30;10(10):1372-1373. doi: 10.1021/acsmedchemlett.9b00424. PMID: 31620218; PMCID: PMC6792170. et al. PROTAC Degradation of Bromodomain for the Treatment of Hyperplasia and Cancer. ACS Med Chem Lett. 2019 Sep 30;10(10):1372-1373. [Content Brief]
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BRD4 Related Products (298)
Related Products (298)
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BRD4 ligand 2
0 ImagesCat. No.: HY-150941CAS No.: 2133902-07-3BRD4 ligand 2 is a BRD4 BD1 inhibitor with an IC50 of 46.4 nM. BRD4 ligand 2 inhibits the proliferation of lymphoma cells. BRD4 ligand 2 also serves as a target protein ligand for PROTACs, and is used in the synthesis of PROTAC BRD4 Degrader-1 (HY-133131). BRD4 ligand 2 is applicable to research related to lymphoma.
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BRD4 D1-IN-3
0 ImagesCat. No.: HY-180831BRD4 D1-IN-3 (compound 39) is a potent, selective, and cell-active BRD4-D1 inhibitor (IC50 = 39 nM, Ki = 2.4 nM) with >1700-fold selectivity over BRD2-D1. BRD4 D1-IN-3 reduces the expression of pro-inflammatory chemokines CXCL1 and CCL2 in an LPS (HY-D1056)-mediated cellular model of liver inflammation. BRD4 D1-IN-3 can be used for liver inflammation research.
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PROTAC BRD4 Degrader-41
0 ImagesCat. No.: HY-179734PROTAC BRD4 Degrader-41 (Compound A5) is a BRD4 PROTAC degrader with a DC50 of 0.97 nM. PROTAC BRD4 Degrader-41 exhibits potent anti-proliferative activity against various types of cancer cells such as AML, lymphoma, breast cancer, ovarian cancer, and non-small cell lung cancer. PROTAC BRD4 Degrader-41 can induce G0/G1 phase arrest and apoptosis in MV4-11 cells. PROTAC BRD4 Degrader-41 downregulates the transcriptional level of c-Myc.
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PROTAC BRD4 Degrader-35
0 ImagesCat. No.: HY-177041CAS No.: 2503035-53-6
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PROTAC BRD4 Degrader-39
0 ImagesCat. No.: HY-175767PROTAC BRD4 Degrader-39 is a selective targeting Bromodomain protein 4 (BRD4) degrader with an DC50 value of 24.66 nM. PROTAC BRD4 Degrader-39 conjugates BRD PROTAC (ARV-771) (HY-100972) with carbohydrate. PROTAC BRD4 Degrader-39 selectively delivers to tumor cells with high GLUT1 expression, followed by GSH-triggered release of ARV-771 and degrades BRD4. PROTAC BRD4 Degrader-39 can inhibit tumor growth and show no significant toxicity. PROTAC BRD4 Degrader-39 can be used for the research of cancer, such as breast cancer.
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ZX079
0 ImagesCat. No.: HY-181854CAS No.: 3124583-65-6ZX079 is a dual BRD4 and CBP PROTAC degrader with a BRD4 DC50 value of 0.035 nM and a CBP DC50 value of < 0.02 nM. ZX079 induces dose- and time-dependent degradation of BRD4 and CBP proteins through recruitment of the cereblon E3 ligase. ZX079 induces apoptosis in MV4-11 and MOLM-13 cells, reduces tumor growth in an acute myeloid leukemia xenograft model. ZX079 can be used for the research of acute myeloid leukemia.
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PROTAC BRD4 Degrader-51
0 ImagesCat. No.: HY-187372PROTAC BRD4 Degrader-51 is a PROTAC-class degrader targeting BRD4, which degrades BRD4 via the ubiquitin-proteasome pathway. PROTAC BRD4 Degrader-51 degrades BRD4 (long) and BRD4 (short) isoforms with DC50 values of 27.92 nM and 20.03 nM, respectively. PROTAC BRD4 Degrader-51 exhibits antiproliferative activity against tumor cells. It can be used in research related to various cancers such as leukemia and breast cancer.
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Gal-ARV-771
0 ImagesCat. No.: HY-158331CAS No.: 3055593-64-8Gal-ARV-771 is a galactose-modified derivative of ARV-771 (HY-100972). Gal-ARV-771 is activated in cells expressing SA-β-Gal, thereby releasing ARV-771. Gal-ARV-771 selectively induces Apoptosis. ARV-771 is a BET PROTAC degrader. Gal-ARV-771 can be used in the research of lung adenocarcinoma (Gal+linker: Gal-PAB (HY-188142); PROTAC: ARV-771 (HY-100972)).
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Bromodomain inhibitor-10
0 ImagesCat. No.: HY-147375CAS No.: 1870849-58-3Bromodomain inhibitor-10 (compound 128) is a potent bromodomain inhibitor with Kds of 15.0, 2500 nM for BRD4-1 and BRD4-2, respectively. Bromodomain inhibitor-10 inhibits the production of IL12p40.
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CZL-077
0 ImagesCat. No.: HY-180804CAS No.: 3032444-06-4CZL-077 is a potent, selective, and orally active p300/CBP bromodomain (BRD) inhibitor (p300 IC50 = 0.034 μM, CBP IC50 = 0.052 μM) exhibiting high selectivity over the BRDs of BET proteins (BRD2/3/4). CZL-077 inhibits cell growth with IC50 values of 0.024 μM and 5.6 μM in OPM-2 and 22RV1 cells, respectively. CZL-077 shows antitumor efficacy in OPM-2 and 22RV1 xenograft mouse models. CZL-077 can be used for multiple myeloma and prostate cancer research.
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JQ1-JX5
0 ImagesCat. No.: HY-183575JQ1-JX5 is a DCAF16-based BRD4 PROTAC degrader. JQ1-JX5 covalently modifies Cys58 of DCAF16, promotes ternary complex formation with BRD4, enables BRD4 ubiquitination and proteasomal degradation. JQ1-JX5 induces time-dependent degradation of BRD4 long and short isoforms in AGS cells with DC50 of 43.97 and 16.77 nM. JQ1-JX5 can be used for the research of cancer, such as acute myeloid leukemia.
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BRD4-IN-12
0 ImagesCat. No.: HY-181505CAS No.: 3112325-99-9BRD4-IN-12 is a potent and orally active BRD4 inhibitor with an IC50 of 7.9 nM. BRD4-IN-12 downregulates the expression of c-MYC, BCL-2, CDK4 and upregulates p21. BRD4-IN-12 inhibits tumor cell proliferation and promotes apoptosis. BRD4-IN-12 exhibits excellent antitumor effects in the HCT-116 colorectal cancer xenograft model. BRD4-IN-12 can be used for the study of colorectal cancer (CRC).
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PROTAC BET Degrader-14
0 ImagesCat. No.: HY-179588PROTAC BET Degrader-14 is a highly efficient PROTAC targeting BET (bromodomain and extra-terminal domain). PROTAC BET Degrader-14 can degrade all BET (BRD2, BRD3, BRD4) family proteins. PROTAC BET Degrader-14 potently degrades BET proteins in U2OS osteosarcoma cell lines (BRD4 DC50 = 130 nM) and KYSE180 esophageal squamous cell carcinoma cell lines (DC50 = 40 nM). PROTAC BET Degrader-14’s dependence on the ubiquitin-proteasome system. PROTAC BET Degrader-14 decreases levels of BET-regulated gene products c-Myc, RUNX2, and KRT14. PROTAC BET Degrader-14 can be used for the study of osteosarcoma.
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CDK8/BRD4-IN-1
0 ImagesCat. No.: HY-184727CDK8/BRD4-IN-1 is a dual CDK8/BRD4 inhibitor, with an IC50 of 5.44 μM against CDK8 and an IC50 of 4.03 μM against BRD4. CDK8/BRD4-IN-1 exhibits anticancer activity against colorectal cancer. CDK8/BRD4-IN-1 can be used for the research of colorectal cancer.
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XY-06-005
0 ImagesCat. No.: HY-184949CAS No.: 1642783-78-5XY-06-005 is a modified selective inhibitor of BET bromodomain that binds to BRD4 BD1 L94V, BRD4 BD2 L387V and BRD2 BD2 L383V. XY-06-005 serves as a Ligand for Target Protein for PROTAC for studies related to PROTAC synthesis, such as acting as the target protein ligand structure of XY-06-007 (HY-145226).
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Bromodomain inhibitor-9
0 ImagesCat. No.: HY-147374CAS No.: 1870849-34-5Bromodomain inhibitor-9 is a Bromodomains inhibitor that selectively inhibits BRD4-1 (Kd: 12 nM). Bromodomain inhibitor-9 can be used in the research of diseases or conditions associated with systemic or tissue inflammation, lipid metabolism, fibrosis or chronic autoimmune diseases.
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CBP/p300-IN-22
0 ImagesCat. No.: HY-176251CBP/p300-IN-22 is a selective CBP/EP300-BRD inhibitor with an IC50 of 4 nM. CBP/p300-IN-22 is highly selective over BRD4(1). CBP/p300-IN-22 reduces TNF-α-induced cytokine expression and subsequent immune cell recruitment by inhibiting NF-κB signaling, and has anticancer activity. CBP/p300-IN-22 can be used for the research of rheumatoid arthritis (RA) and other TNF-α-mediated inflammatory conditions.
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BRD4 Inhibitor-25
0 ImagesCat. No.: HY-151972CAS No.: 2976403-41-3BRD4 Inhibitor-25 is a BRD4 inhibitor with IC50s of 0.82 μM, 1.94 μM for BD1 and BD2 domains of BRD4. BRD4 Inhibitor-25 induces apoptotic and autophagy cell death in ovarian cancer cells. BRD4 Inhibitor-25 can be used in the research of cancers, cardiovascular, neuromuscular and inflammatory disorders.
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(S)-BI 2536
0 ImagesCat. No.: HY-50698ACAS No.: 1241725-90-5(S)-BI 2536 is the enantiomer of BI 2536 (HY-50698). (S)-BI 2536 acts as an inhibitor of the BRD4 bromodomain and PLK1 kinase, with a Ki value of 54 nM against BRD4 and a Ki value of 0.42 nM against PLK1 kinase. (S)-BI 2536 exhibits anticancer activity against acute myeloid leukemia. (S)-BI 2536 can be used for the research of acute myeloid leukemia.
