5dw2 | pdb_00005dw2
X-ray crystal structure of human BRD4(BD1) in complex with RVX297 to 1.12 A resolution
Structural highlights
Disease[BRD4_HUMAN] Note=A chromosomal aberration involving BRD4 is found in a rare, aggressive, and lethal carcinoma arising in midline organs of young people. Translocation t(15;19)(q14;p13) with NUT which produces a BRD4-NUT fusion protein.[1] [2] Function[BRD4_HUMAN] Plays a role in a process governing chromosomal dynamics during mitosis (By similarity). Publication Abstract from PubMedBromodomains are epigenetic readers that specifically bind to the acetyl lysine residues of histones and transcription factors. Small molecule BET bromodomain inhibitors can disrupt this interaction which leads to potential modulation of several disease states. Here we describe the binding properties of a novel BET inhibitor RVX-297 that is structurally related to the clinical compound RVX-208, currently undergoing phase III clinical trials for the treatment of cardiovascular diseases, but is distinctly different in its biological and pharmacokinetic profiles. We report that RVX-297 preferentially binds to the BD2 domains of the BET bromodomain and Extra Terminal (BET) family of protein. We demonstrate the differential binding modes of RVX-297 in BD1 and BD2 domains of BRD4 and BRD2 using X-ray crystallography, and describe the structural differences driving the BD2 selective binding of RVX-297. The isothermal titration calorimetry (ITC) data illustrate the related differential thermodynamics of binding of RVX-297 to single as well as dual BET bromodomains. RVX-297- a novel BD2 selective inhibitor of BET bromodomains.,Kharenko OA, Gesner EM, Patel RG, Norek K, White A, Fontano E, Suto RK, Young PR, McLure KG, Hansen HC Biochem Biophys Res Commun. 2016 Jun 6. pii: S0006-291X(16)30939-1. doi:, 10.1016/j.bbrc.2016.06.021. PMID:27282480[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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