A JQ1-and-phthalimide conjugate that causes the degradation of BRD4 protein
dBET1 is a JQ1-and-phthalimide conjugate that causes the degradation of BRD4 protein, a transcriptional coactivator that regulates the expression of genes that promote cancer cell proliferation and survival. JQ1 is a selective BET bromodomain (BRD) inihbitor. The phthalimide portion is a derivative of the drug thalidomide, which is known to bind to cereblon (CRBN), part of an ubiquitin E3 ligase complex resulting in ubiquitylation and degradation by the proteasome. The conjugate dBET1 induced highly selective cereblon-dependent BET protein degradation both in vitro and in vivo. It induced complete CRBN-dependent proteosomal degradation of BRD4 in a human acute myeloid leukaemia (AML) cell line and delayed leukemia progression in mice.
The Journal of biological chemistry, 293(16), 6187-6200 (2018-02-17)
Upon binding to thalidomide and other immunomodulatory drugs, the E3 ligase substrate receptor cereblon (CRBN) promotes proteosomal destruction by engaging the DDB1-CUL4A-Roc1-RBX1 E3 ubiquitin ligase in human cells but not in mouse cells, suggesting that sequence variations in CRBN may
Science (New York, N.Y.), 348(6241), 1376-1381 (2015-05-23)
The development of effective pharmacological inhibitors of multidomain scaffold proteins, notably transcription factors, is a particularly challenging problem. In part, this is because many small-molecule antagonists disrupt the activity of only one domain in the target protein. We devised a
Neuroinflammation after stroke significantly contributes to neuronal cell death. Bromodomain and Extra Terminal Domain (BET) proteins are essential to inflammatory gene transcription. BET proteins (BRD2, BRD3, BRD4, and BRDT) have varied effects including chromatin remodeling, histone acetyltransferase activity, and as
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