5ad3

Bivalent binding to BET bromodomains

spinqualitylabelsall models 5ad3, resolution 1.49Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5ad3 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.49Å Ligands: K6K Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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. Function BRD4_HUMAN Plays a role in a process governing chromosomal dynamics during mitosis (By similarity). Publication Abstract from PubMed Proteins of the bromodomain and extraterminal (BET) family, in particular bromodomain-containing protein 4 (BRD4), are of great interest as biological targets. BET proteins contain two separate bromodomains, and existing inhibitors bind to them monovalently. Here we describe the discovery and characterization of probe compound biBET, capable of engaging both bromodomains simultaneously in a bivalent, in cis binding mode. The evidence provided here was obtained in a variety of biophysical and cellular experiments. The bivalent binding results in very high cellular potency for BRD4 binding and pharmacological responses such as disruption of BRD4-mediator complex subunit 1 foci with an EC50 of 100 pM. These compounds will be of considerable utility as BET/BRD4 chemical probes. This work illustrates a novel concept in ligand design-simultaneous targeting of two separate domains with a drug-like small molecule-providing precedent for a potentially more effective paradigm for developing ligands for other multi-domain proteins. Potent and selective bivalent inhibitors of BET bromodomains.,Waring MJ, Chen H, Rabow AA, Walker G, Bobby R, Boiko S, Bradbury RH, Callis R, Clark E, Dale I, Daniels DL, Dulak A, Flavell L, Holdgate G, Jowitt TA, Kikhney A, McAlister M, Mendez J, Ogg D, Patel J, Petteruti P, Robb GR, Robers MB, Saif S, Stratton N, Svergun DI, Wang W, Whittaker D, Wilson DM, Yao Y Nat Chem Biol. 2016 Dec;12(12):1097-1104. doi: 10.1038/nchembio.2210. Epub 2016, Oct 24. PMID:27775716 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Bromodomain-containing protein 3D structures

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