brd3

PROTAC BRD3 BRD4-L degrader-2, a PROTAC molecule, selectively degrades cellular BRD3 and BRD4-L with K i values of 16.91 and 2.8 nM, respectively, and exhibits robust antitumor activity in mouse xenograft models, serving as a research tool for cancer [1].

ARV-771 is a potent BET degrader based on PROTAC technology, with Kds of 34 nM for BRD2(1), 4.7 nM for BRD2(2), 8.3 nM for BRD3(1), 7.6 nM for BRD3(2), 9.6 nM for BRD4(1), and 7.6 nM for BRD4(2), respectively[1].

BETd-260, a PROTAC linked by a Cereblon ligand and a BET ligand, has an inhibitory effect on BRD4 protein in leukemic cell lines.

HJB97 is used for the design of potential PROTAC BET degrader. It also has antitumor activity. HJB97 is a high-affinity inhibitor of BET (Kis: 0.9 nM (BRD2 BD1), 0.27 nM (BRD2 BD2), 0.18 nM (BRD3 BD1), 0.21 nM (BRD3 BD2), 0.5 nM (BRD4 BD1), 1.0 nM (BRD4 BD2), respectively).

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].

MZP-54 is a selective degrader of BRD3/4 based on PROTAC technology(Kd of 4 nM for Brd4BD2)

GXF-111, a proteolysis targeting chimera (PROTAC) molecule, efficiently induces the selective degradation of the BRD3 and BRD4-L proteins. It exhibits high binding affinities to both BRD3 BD1 and BRD3 BD2, with K i values of 11.97 nM and 2.35 nM, respectively. This compound is utilized in cancer research [1].

SIM1 is a potent and selective trivalent PROTAC®Degrader based on BET bromodomain inhibitors linked to a Von Hippel Lindau (VHL) ligand via branched linkers. SIM1 degrades all BET family proteins with a preference for BRD2 (DC50values = 0.7 nM, 1.1 nM and 3.3 nM for BRD4, BRD2 and BRD3, respectively). SIM1 degrades BRD2 more significantly and rapidly than BRD3 and BRD4, and degrades BET proteins with a higher potency than a bivalent degrader. SIM1 also decreases protein levels for Myc and HMOX1 and induces apoptosis in prostate cancer cells.

BRD4 degrader AT1 is a highly selective Brd4 degrader based on PROTAC technology, with a Kd of 44 nM for Brd4BD2 in cells.

MZP-55 is a selective BRD3/4 degrader based on PROTAC technology(Brd4BD2 with Kd of 8 nM)

PROTAC BRD2 BRD4 degrader-1 (compound 15) is a potent, selective degrader of BET proteins BRD4 and BRD2, achieving rapid, reversible, and unexpectedly selective elimination compared to BRD3. It effectively suppresses solid tumors with minimal cytotoxic effects and comprises a BET inhibitor, a connecting linker, and thalidomide as the ligand for cereblon (CRBN) cullin 4A[1].

OARV-771, a VHL-based BET degrader (PROTAC) featuring enhanced cell permeability, demonstrates DC50 values of 6 nM for Brd4, 1 nM for Brd2, and 4 nM for Brd3, respectively [1].

MZ 1 is a BRD4 protein degrader based on PROTAC technology.