GNE-371, a Potent and Selective Chemical Probe for the Second Bromodomains of Human Transcription-Initiation-Factor TFIID Subunit 1 and Transcription-Initiation-Factor TFIID Subunit 1-like
作者:Shumei Wang、Vickie Tsui、Terry D. Crawford、James E. Audia、Daniel J. Burdick、Maureen H. Beresini、Alexandre Côté、Richard Cummings、Martin Duplessis、E. Megan Flynn、Michael C. Hewitt、Hon-Ren Huang、Hariharan Jayaram、Ying Jiang、Shivangi Joshi、Jeremy Murray、Christopher G. Nasveschuk、Eneida Pardo、Florence Poy、F. Anthony Romero、Yong Tang、Alexander M. Taylor、Jian Wang、Zhaowu Xu、Laura E. Zawadzke、Xiaoyu Zhu、Brian K. Albrecht、Steven R. Magnuson、Steve Bellon、Andrea G. Cochran
DOI:10.1021/acs.jmedchem.8b01225
日期:2018.10.25
The biological functions of the dual bromodomains of human transcription-initiation-factor TFIID subunit 1 (TAF1(1,2)) remain unknown, although TAF1 has been identified as a potential target for oncology research. Here, we describe the discovery of a potent and selective in vitro tool compound for TAF1(2), starting from a previously reported lead. A cocrystal structure of lead compound 2 bound to TAF1(2) enabled structure-based design and structure-activity-relationship studies that ultimately led to our in vitro tool compound, 27 (GNE-371). Compound 27 binds TAF1(2) with an IC(50 )of 10 nM while maintaining excellent selectivity over other bromodomain-family members. Compound 27 is also active in a cellular-TAF1(2) target-engagement assay (IC50 = 38 nM) and exhibits antiproliferative synergy with the BET inhibitor JQ1, suggesting engagement of endogenous TAF1 by 27 and further supporting the use of 27 in mechanistic and target-validation studies.