5ad3
From Proteopedia
Bivalent binding to BET bromodomains
Structural highlights
DiseaseBRD4_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] FunctionBRD4_HUMAN Plays a role in a process governing chromosomal dynamics during mitosis (By similarity). Publication Abstract from PubMedProteins 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[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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Categories: Homo sapiens | Large Structures | Bobby R | Boiko S | Bradbury RH | Callis R | Chen H | Dale I | Daniels D | Flavell L | Holdgate G | Jowitt TA | Kikhney A | McAlister M | Ogg D | Patel J | Petteruti P | Rabow AA | Robb GR | Robers M | Stratton N | Svergun DI | Walker G | Wang W | Waring MJ | Whittaker D