Hijacking the E3 Ubiquitin Ligase Cereblon to Efficiently Target BRD4. Chem Biol. 2015 Jun 18;22(6):755-63. PMID:26051217 DOI:10.1016/j.chembiol.2015.05.009
Target: BRD4 Bromodomain-containing protein 4 O60885 Homo sapiens
E3 ligase: Cereblon
E3 binder: Pomalidomide
SMILES: show
Nc1cccc2c1C(=O)N(C1CCC(=O)NC1=O)C2=O

Ligand Name: OTX015
IC50: < 14 nM
SMILES: show
Cc1sc2c(c1C)C(c1ccc(Cl)cc1)=N[C@@H](CC(=O)Nc1ccc(O)cc1)c1nnc(C)n1-2

Calculated Values
MW: 923.45
Hbond donors: 3
Hbond acceptors: 15
cLogP: 5.77
TPSA: 204.67

SMILES: show
Cc1sc2c(c1C)C(c1ccc(Cl)cc1)=N[C@@H](CC(=O)Nc1ccc(OCCOCCOCCOCCNc3cccc4c3C(=O)N(C3CCC(=O)NC3=O)C4=O)cc1)c1nnc(C)n1-2

Linker type: PEG
Incubation time (hours): 0.5,1,2,4,7,24
Cells: Namalwa, CA-46, Ramos
IC50: < 90 nM
DC50: < 1 nM
Dmax: ~ 100 %
Tested a non-binding E3 control?: No
Tested competition with ligand?: No
Tested proteaseome inhibitor?: Yes
Proteomics data available?: No
Tested engagement in cells?: No
Off-targets reported?: No
Comments: tested also biological effects - proliferation and caspase activity on BL cells. IC50 of ligand is 14 nM (BD1), 3.5 nM (BD2). IC50 of PROTAC is 90 nM (BD1), 28 nM (BD2).
Contributed by: Adi Rogel