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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WWL0245
0 ImagesCat. No.: HY-153519CAS No.: 2869057-11-2WWL0245 is a potent and seletive BRD4 PROTAC. WWL0245 selectively degrades BRD4 with sub-nanomolar DC50 (<1 nM) than BRD2/3 and PLK1 ( DC50>1 μM). WWL0245 shows excellent selective cytotoxicity in the BETi sensitive cancer cell lines, including AR-positive prostate cancer cell lines. WWL0245 is a promising drug candidate for AR-positive prostate cancer research and a valuable tool compound to study the biological function of BRD4.
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BRD4 RIMTAC-1
0 ImagesCat. No.: HY-187390BRD4 RIMTAC-1 is a BRD4 PROTAC degrader based on the RIPK1-mediated targeted chimera (RIMTAC) technology. It hijacks the endogenous RIPK1-VHL complex via the RIPK1 inhibitor moiety to indirectly recruit the VHL E3 ligase, forming a BRD4-Compound 10-RIPK1-VHL quaternary complex, and degrades BRD4 through the ubiquitin-proteasome system (UPS). BRD4 RIMTAC-1 exhibits selectivity over other BET proteins, induces concentration- and time-dependent, reversible post-translational degradation of BRD4 without altering the target mRNA level. BRD4 RIMTAC-1 potently induces endogenous BRD4 degradation in RAW264.7 and HEK-293T cells, with DC50 values of 179.1 nM and 54.12 nM, respectively. BRD4 RIMTAC-1 can be used for the research of cancer and inflammation-related diseases.
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JP-2-196 hydrochloride
0 ImagesCat. No.: HY-W854844BJP-2-196 hydrochloride is a molecular glue that covalently targets the RING family E3 ligase RNF126. JP-2-196 hydrochloride also binds to RNF40, MID2, RNF219, RNF14, and LRSAM1. JP-2-196 hydrochloride induces the formation of ternary complexes between RNF126 and target proteins (e.g., BRD4, AR-V7), thereby promoting their ubiquitination and proteasomal degradation. JP-2-196 hydrochloride has potential for cancer research (such as prostate cancer and leukemia).
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PROTAC BET Degrader-18
0 ImagesCat. No.: HY-184335CAS No.: 3097564-20-7PROTAC BET Degrader-18 is a PROTAC targeting BET, with a DC50 of 0.676 nM in HEK293-BRD4-HiBiT-KI cells. PROTAC BET Degrader-18 mainly targets and degrades BRD4 (EC50 = 59.91 nM), and exhibits weak degradation activity against BRD2. PROTAC BET Degrader-18 inhibits the expression of downstream oncoprotein c-Myc, thereby inducing cell cycle arrest and apoptosis, while suppressing oncoprotein expression. PROTAC BET Degrader-18 shows antiproliferative activity against acute myeloid leukemia cells and triple-negative breast cancer cells. PROTAC BET Degrader-18 demonstrates antitumor efficacy in xenograft mouse models. PROTAC BET Degrader-18 can be used for the research of acute myeloid leukemia and triple-negative breast cancer.
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Hsp70TAC BRD4 Degrader-1
0 ImagesCat. No.: HY-182958Hsp70TAC BRD4 Degrader-1 is a degrader targeting BRD4, with a KD value of 0.22 μM. Hsp70TAC BRD4 Degrader-1 forms a ternary complex with Hsp70 (KD: 5.13 μM), and specifically and efficiently degrades intracellular BRD4 via the ubiquitin-proteasome pathway. Hsp70TAC BRD4 Degrader-1 exhibits potent anti-tumor proliferative activity. Hsp70TAC BRD4 Degrader-1 can be used in studies related to triple-negative breast cancer and glioblastoma multiforme. (Pink: BRD4 ligand (HY-78695); Blue: HSP70 ligand (HY-182979); Black: linker (HY-B0236)).
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BRD4/AKT-IN-1
0 ImagesCat. No.: HY-183273CAS No.: 3087270-50-3BRD4/AKT-IN-1 is a BRD4/AKT inhibitor with BRD4 IC50 66.12 nM and AKT1 IC50 143.81 nM. BRD4/AKT-IN-1 blocks BRD4-mediated c-Myc transcriptional regulation, modulates AKT1 signaling, decouples AKT phosphorylation from pro-survival effectors. BRD4/AKT-IN-1 induces G0/G1 cell cycle arrest via downregulated phosphorylated RB, cyclin E1, CDK2. BRD4/AKT-IN-1 elevates LC3B levels to promote autophagy. BRD4/AKT-IN-1 promotes apoptosis in cancer cells. BRD4/AKT-IN-1 can be used for the research of metastatic castration-resistant prostate cancer.
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AB3067
0 ImagesCat. No.: HY-170390AB3067 is a PROTAC degrader of BET that simultaneously recruits the E3 ligase activities of CRBN and VHL. The DC50 values of AB3067 against BRD2, BRD3, BRD4Short and BRD4Long are 15 nM, 1.6 nM, 2.1 nM and 2.3 nM, respectively. AB3067 induces additive protein ubiquitination and proteasomal degradation, and minimizes the cross-degradation of E3 ligases. AB3067 can be used in colon cancer-related studies.
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ARV-771 (Standard)
0 ImagesCat. No.: HY-100972RCAS No.: 1949837-12-0ARV-771 (Standard) is the analytical standard of ARV-771 (HY-100972). This product is intended for research and analytical applications. ARV-771 is a BET PROTAC degrader, with Kd values of 34, 4.7, 8.3, 7.6, 9.6 and 7.6 nM against BRD2 (1), BRD2 (2), BRD3 (1), BRD3 (2), BRD4 (1) and BRD4 (2) , respectively. ARV-771 inhibits the transcription of AR/AR-v7 and its downstream target genes. By degrading BRD4 protein, ARV-771 enhances the sensitivity of prostate cancer cells to ferroptosis, suppresses cancer cell viability, and induces apoptosis. ARV-771 downregulates the levels of BRD4, c-MYC and AR-V7 in tumor tissues and inhibits tumor tissue growth. ARV-771 can be used in prostate cancer-related research.
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GSK778 hydrochloride
0 ImagesCat. No.: HY-136570ACAS No.: 2863657-79-6Synonyms: iBET-BD1 hydrochloride
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BRD4 ligand 13
0 ImagesCat. No.: HY-178094CAS No.: 1101702-81-1BRD4 ligand 13 is a BRD4 ligand that can be used for the synthesis of PROTACs, such as Cath-L-dBET1 (HY-173257). BRD4 ligand 13 is a target protein ligand-conjugate that can be used for the synthesis of PROTACs, such as SJH1-51B (HY-162240).
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TW9
0 ImagesCat. No.: HY-155222CAS No.: 2614417-90-0TW9 is a potent dual inhibitor simultaneously targeting BET and HDAC proteins with KDs of 0.069 μM, 0.231 μM for BRD4(1), BRD4(2), and an IC50 of 0.29 μM for HDAC1, respectively. TW9 is a newly generated adduct of the BET inhibitor (+)-JQ1 (HY-13030) and class I HDAC inhibitor CI994 (HY-50934). TW9 shows high potency in suppressing tumor growth in pancreatic ductal adenocarcinoma (PDAC). TW9 improves the efficacy of the chemotherapeutic agent Gemcitabine (HY-17026).
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CBP/p300-IN-24
0 ImagesCat. No.: HY-W173361CAS No.: 56369-21-2CBP/p300-IN-24 is a selective CBP bromodomain inhibitor with an IC50 of 32 μM, showing selectivity over BRD4 BD-1 bromodomain. CBP/p300-IN-24 binds to the acetyl lysine binding pocket, forms hydrogen bonds with Asn1168 and a solvent-mediated hydrogen bond with Tyr1125, and forms hydrophobic interactions with Leu1120, Ile1122, and Val1174.
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PROTAC BRD4 Degrader-49
0 ImagesCat. No.: HY-185854CAS No.: 3115940-40-1BRD4 degrader-8 is a BRD4-targeting degrader. BRD4 degrader-8 induces degradation of BRD4 protein via the ubiquitin-proteasome pathway. BRD4 degrader-8 can be used for the research of hematologic tumors, gastrointestinal stromal tumors, histiocytic lymphoma, non-small cell lung cancer, small cell lung cancer, lung adenocarcinoma, lung squamous cell carcinoma, pancreatic cancer, breast cancer, prostate cancer, liver cancer, skin cancer, epithelial cell carcinoma, colorectal cancer, kidney cancer, gastric cancer, head and neck cancer, nasopharyngeal cancer.
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BRD4 ligand 10
0 ImagesCat. No.: HY-185884CAS No.: 2086299-38-7BRD4 ligand 10 is a PROTAC target protein ligand. BRD4 ligand 10 can be used to synthesize PROTAC BRD4 Degrader-49 (HY-185854).
