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 (300)
Related Products (300)
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SJ46421
0 ImagesCat. No.: HY-168634SJ46421 is a BRD3BD2 PROTAC degrader. SJ46421 induces a cooperative ternary complex of KLHDC2 and BRD3BD2 with an IC50 of 7.8 nM. SJ46421 binds to the substrate-binding pocket of KLHDC2, forms cooperative ternary complexes with BRD3BD2, BRD2BD2 and BRD4BD2, disrupts the autoinhibitory tetramer assembly of KLHDC2, drives selective ubiquitination of BRD3BD2, and inhibits the ubiquitination of endogenous KLHDC2 diglycine substrates. SJ46421 can be used in cancer research.
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TAT-PiET
0 ImagesCat. No.: HY-P10445CAS No.: 3036046-03-1TAT-PiET is a cell-penetrating peptide targeting the extra-terminal (ET) domain of BRD4. TAT-PiET can reduce BRD4 and JMJD6 levels and inhibit cell proliferation. TAT-PiET also resists the endocrine resistance of ERα-positive breast cancer cells. TAT-PiET can be used for the research of cancer, such as breast cancer.
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BRD4 Inhibitor-15
0 ImagesCat. No.: HY-143235CAS No.: 2761366-60-1BRD4 Inhibitor-15 (compound 13) is a potent BRD4 inhibitor, with an IC50 of 18 nM. BRD4 Inhibitor-15 induces apoptosis of 22RV1 cells by regulating Bcl-2/Bax proteins and activating caspase-3 signaling pathway. BRD4 Inhibitor-15 down-regulates the c-Myc level in 22RV1 cells. BRD4 Inhibitor-15 can be used for prostate cancer research.
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PROTAC BRD4 Degrader-46
0 ImagesCat. No.: HY-182801CAS No.: 2766179-68-2PROTAC BRD4 Degrader-46 is a heterobifunctional BRD4 PROTAC degrader. PROTAC BRD4 Degrader-46 binds to both BRD4 and CRBN, thereby triggering ubiquitination and proteasomal degradation of BRD4. PROTAC BRD4 Degrader-46 downregulates the levels of downstream BRD2, BRD3 and MYC. PROTAC BRD4 Degrader-46 can be used in the research of cancers such as multiple myeloma.
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RAJQ14
0 ImagesCat. No.: HY-181495CAS No.: 2375455-53-9RAJQ14 is a BRD4 PROTAC-like CAP-TAC (Proteasome Cap Targeting Chimeras) degrader. RAJQ14 binds to 19S proteasome cap subunits RPN1, RPN10, RPN13, and USP14 to recruit target proteins to the proteasome for ubiquitination-independent, proteasome-dependent degradation. RAJQ14 can be used for the research of cancer (Pink: BRD4 Ligand (HY-181496); Blue: Proteasome Ligand (HY-128978); Black: Linker).
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KBD-1
0 ImagesCat. No.: HY-184151KBD-1 is a muscle-specific BRD4 PROTAC degrader with human KDs of 27.04 nM and 37.36 µM against BRD4 and KLHL4L, respectively. KBD-1 recruits the muscle-specific E3 ligase KLHL41, mediating Cullin-RING ligase (CRL)-dependent ubiquitination and proteasome degradation of BRD4. KBD-1 can be used for the research of myosarcoma.
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BRD4-IN-41
0 ImagesCat. No.: HY-115541CAS No.: 1877286-69-5BRD4-IN-41 is a BRD4 inhibitor with an IC50 of 34 nM. BRD4-IN-41 also inhibits JAK2, FLT3, RET, ROS1, NTRK3, PDGFRb, and FGFR1 kinases with IC50 values ranging from 0.9 nM to 43 nM. BRD4-IN-41 inhibits acetyl-lysine binding site of BRD4, downregulates c-MYC, reduces phosphorylated STAT3 levels, induces G1 cell cycle arrest and apoptosis, thereby inhibiting cancer cells growth. BRD4-IN-41 can be used for the research of cancer, such as multiple myeloma and acute myeloid leukemia.
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BD-7148
0 ImagesCat. No.: HY-186267CAS No.: 3037514-35-2BD-7148 is a potent, highly selective BRD4 PROTAC degrader with a DC50 of 0.9 nM. BD-7148 binds to recombinant human BRD2-BD1, BRD2-BD2, BRD3-BD1, BRD3-BD2, BRD4-BD1 and BRD4-BD2 domain proteins, with Kd values ranging from 26 nM to 240 nM, and shows no binding preference for BRD4 domains over BRD2 or BRD3 domains. BD-7148 inhibits the growth of leukemia and breast cancer cells. BD-7148 can be used in the research of leukemia and breast cancer.
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BRD3/BRD4-L ligand-2
0 ImagesCat. No.: HY-175924CAS No.: 3075063-28-1
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BRD4 degrader-7
0 ImagesCat. No.: HY-183077Purity: 99.59%BRD4 degrader-7 (Compound ZZ1) is a CTLH-dependent BRD4 degrader and c-Glue with a DC50 of 489 nM. BRD4 degrader-7 converts to a sulfinic acid derivative inside cells, interacts with the basic pocket of YPEL5, mediates the bridging of BRD4 BD1 to the YPEL5 subunit of the CTLH E3 ubiquitin ligase, and thereby promotes the formation of a ternary complex. BRD4 degrader-7 can be used in research on Ewing's sarcoma and leukemia.
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MrTAC-8
0 ImagesCat. No.: HY-183061MrTAC-8, methylarginine-targeting chimera (MrTAC), is a BRD4 degrader with DC50 values of 46 nM in HeLa cells. MrTAC-8 recruits PRMT1, PRMT3, PRMT4, PRMT5, and PRMT7 to target proteins, inducing arginine methylation that triggers lysosomal degradation. MrTAC-8 degrades proteins across diverse subcellular localizations and independent of native proteolytic routes. MrTAC-8 can be used for the research of cervical cancer, glioblastoma.
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PROTAC BRD4 Degrader-42
0 ImagesCat. No.: HY-180150PROTAC BRD4 Degrader-42 (Compound P6) is a PROTAC-based BRD4 degrader with a DC50 of 1.11 μM. PROTAC BRD4 Degrader-42 promotes the ubiquitination and degradation of BRD4. PROTAC BRD4 Degrader-42 downregulates c-Myc expression and induces Apoptosis by upregulating BAD and BAX protein expression. PROTAC BRD4 Degrader-42 also exhibits anticancer activity against myeloid monocytic leukemia.
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BET-IN-13
0 ImagesCat. No.: HY-152213CAS No.: 2506823-08-9BET-IN-13 is a potent BET inhibitor with an IC50 value of 1.6 nM. BET-IN-13 reduces LPS-induced TNF-α, IL-1β, IL-6, and NOS2 mRNA expression levels. BET-IN-13 shows anti-inflammatory activity. BET-IN-13 has the potential for the research of acute liver injury.
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SJ44236
0 ImagesCat. No.: HY-170900SJ44236 is a BET PROTAC degrader with activity against BRD2, BRD3 and BRD4 (DC50 = 127 pM). SJ44236 induces ubiquitination and proteasomal degradation by forming a ternary complex with BET proteins and CRBN-DDB1. SJ44236 downregulates c-Myc, upregulates p53 and reduces cancer cell viability. SJ44236 can be used for the research of leukemia and medulloblastoma.
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BRD4 degrader-2
0 ImagesCat. No.: HY-163639CAS No.: 3036530-43-2
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PROTAC BRD4 Degrader-38
0 ImagesCat. No.: HY-175240PROTAC BRD4 Degrader-38 is a BRD4 PROTAC degrader with DC50 values of 86 nM and 106 nM against the short and long isoforms of BRD4, respectively. PROTAC BRD4 Degrader-38 covalently binds to the Cys232 residue of TRIM28 to form a ternary complex containing BRD4, thereby promoting the ubiquitination and degradation of BRD4. PROTAC BRD4 Degrader-38 can be used in the research of acute myeloid leukemia.
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BRD4 Inhibitor-40
0 ImagesCat. No.: HY-173062CAS No.: 2994635-04-8BRD4 Inhibitor-40 (Compound 23) is the inhibitor for BRD that inhibits BRD4-BD1, BRD4-BD2, BRD2-BD1 and BRD2-BD2 with IC50s of 16.1, 142.18, 29.35 and 302.35 nM, respectively. BRD4 Inhibitor-40 modulates the expression of c-Myc and p21, arrests cell cycle at G1 phase, inhibits Pkd1-null (PN) renal cystic epithelial cells, and blocks the renal cysts formation in Madin-Darby canine kidney and embryonic kidney vesicle models. BRD4 Inhibitor-40 exhibits renal cysts inhibitory activity in mouse models.
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NEP162
0 ImagesCat. No.: HY-174996CAS No.: 3031840-36-2NEP162 is a BRD4 PROTAC degrader based on the E3 ubiquitin ligase GID4, with DC50 values of 1.2 μM and 1.6 μM in SW480 and U2OS cells, respectively, and a Kd value of 0.13 µM for GID4. NEP162 bridges the E3 ligase GID4 and BRD4 to form a ternary complex, promotes polyubiquitination and subsequent degradation of BRD4 via the ubiquitin-proteasome system, reduces the proliferation capacity of tumor cells and induces apoptosis. NEP162 can be used for research on cancers such as osteosarcoma, colorectal cancer and non-small cell lung cancer.
