(+)-JQ1 maleimide是一种探针,由一个与BRD4配体JQ1通过PEG2连接器相连的含有活性的maleimide组成。它可用于COFFEE方法(COvalent Functionalization Followed by E3 Electroporation),在该方法中,(+)-JQ1 maleimide与VHL共价连接后通过电穿孔导入活细胞。E3连接酶在细胞内与BRD4形成复合物,引导其降解。
(+)-JQ-1 carboxylic acid is a potent bromodomain and extra terminal domain (BET) inhibitor. (+)-JQ-1 carboxylic has potential to be used as a precursor to synthesize PROTACs and other conjugates.
KB02-JQ1 is a potent and specific proteolysis targeting chimera (PROTAC) that specifically degrades BRD4, acting as a molecular glue. It does not degrade BRD2 or BRD3. The mechanism of action involves covalent modification of the E3 ligase DCAF16, thereby promoting BRD4 degradation. Importantly, KB02-JQ1 demonstrates enhanced stability and durability in facilitating protein degradation within biological systems. The compound forms a complex with the ubiquitin E3 ligase ligand KB02 through a linker, resulting in the formation of KB02-JQ1[1].
(+)-JQ-1-aldehyde is the aldehyde derivative of (+)-JQ1, commonly used as a precursor for the synthesis of PROTACs targeting the BET bromine domain[1].
Cacospongionolide B is isolated from the sponge Fasciospongia cavernosa. The marine sponge natural product cacospongionolide B (1) is one of a class of compounds bearing a g-hydroxybutenolide which are known to inhibit multiple forms of secratory phospholipase A2,1 enzymes believed to initiate a cascade of biological events leading to inflammation.
TD-428 is a highly specific degrader of BRD4(DC50 of 0.32 nM). TD-428 is a BET PROTAC, which comprises TD-106 (a CRBN ligand) linked to JQ1 (a BET inhibitor). TD-428 efficiently induce BET protein degradation.
KB02-COOH is a synthetic fragment derived from ubiquitin E3 ligase ligand KB02, which possesses potential utility in the synthesis of PROTAC compounds. Notably, KB02-COOH can be employed in the generation of PROTAC constructs like KB02-JQ1 and KB02-SLF.
EN219 is a synthetic recruiter of the E3 ubiquitin ligase RNF114.1It binds to cysteine 8 (C8) in the intrinsically disordered region of RNF114 (RNF114-C8; IC50= 470 nM) and inhibits RNF114-induced autoubiquitination and p21 ubiquitination in a cell-free assay when used at a concentration of 50 μM. EN219 (1 μM) also interacts with cysteine residues in the tubulin β1 chain (TUBB1), heat shock protein 60 (Hsp60), also known as Hsp family D member 1 (HspD1), and histone H3.1 (HIST1H3A) in 231MFP human breast cancer cells in a proteomic profiling assay. It has been linked to the bromodomain and extra terminal domain (BET) inhibitor ligand (+)-JQ1 for use as a proteolysis-targeting chimera (PROTAC) to degrade bromodomain-containing protein 4 (BRD4) in 231MFP cells. 1.Luo, M., Spradlin, J.N., Boike, L., et al.Chemoproteomics-enabled discovery of covalent RNF114-based degraders that mimic natural product functionCell Chem. Biol.28(4)559-566(2021)
β-Naphthoflavone-CH2-OH (β-NF-CH2-OH) serves as an AhR E3 ligase ligand, forming chimeric molecules when connected to a protein ligand through a linker, resulting in PROTACs or SNIPERs (e.g., β-naphthoflavone-JQ1). These chimeric molecules recruit the AhR E3 ligase complex by incorporating AhR ligands. By inducing ubiquitination-mediated degradation, PROTACs effectively target and degrade cancer-promoting proteins [1].