Discovery and Characterization of GSK2801, a Selective Chemical Probe for the Bromodomains BAZ2A and BAZ2B
作者:Peiling Chen、Apirat Chaikuad、Paul Bamborough、Marcus Bantscheff、Chas Bountra、Chun-wa Chung、Oleg Fedorov、Paola Grandi、David Jung、Robert Lesniak、Matthew Lindon、Susanne Müller、Martin Philpott、Rab Prinjha、Catherine Rogers、Carolyn Selenski、Cynthia Tallant、Thilo Werner、Timothy M. Willson、Stefan Knapp、David H. Drewry
DOI:10.1021/acs.jmedchem.5b00209
日期:2016.2.25
Bromodomains are acetyl-lysine specific protein interaction domains that have recently emerged as a new target class for the development of inhibitors that modulate gene transcription. The two closely related bromodomain containing proteins BAZ2A and BAZ2B constitute the central scaffolding protein of the nucleolar remodeling complex (NoRC) that regulates the expression of noncoding RNAs. However,
溴结构域是乙酰赖氨酸特异的蛋白质相互作用域,最近已成为调节基因转录的抑制剂的开发的新目标类别。包含两个密切相关的bromodomain的蛋白质BAZ2A和BAZ2B构成了核仁重塑复合物(NoRC)的中央支架蛋白,该蛋白调节非编码RNA的表达。然而,BAZ2 bromodomains具有较低的预测药物作用性,到目前为止,尚未公开选择性抑制剂。在这里,我们报告了GSK2801的发展,GSK2801是BAZ2A和BAZ2B溴结构域的有效,选择性和细胞活性乙酰赖氨酸竞争性抑制剂,以及无活性的对照化合物GSK8573。对于BAZ2B和BAZ2A,GSK2801分别以136和257 nM的解离常数(KD)结合BAZ2溴结构域。晶体结构表现出规范的乙酰赖氨酸竞争结合模式。使用荧光漂白后的荧光恢复(FRAP)监测GFP-BAZ2A从乙酰化染色质的置换来证明细胞活性。在小鼠中进行的药代动力学研究表明,口服口