一种CBP/p300双位抑制剂KIX是Myb的选择性和有效调节剂
Stephen T Joy1, Madeleine J Henley1,2, Samantha N De Salle1,2
1Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States.
Journal of the American Chemical Society
|September 7, 2021
概括
研究人员开发了MybLL-tide,这是一种强大的双位体抑制剂,针对Myb-CBP/ p300 KIX相互作用,对急性髓性白血病 (AML) 和其他癌症至关重要.
科学领域:
- 生物化学
- 分子生物学
- 癌症研究
背景情况:
- 在某些急性髓性白血病 (AML) 和其他癌症中,CBP/ p300的KIX动机与转录激活剂Myb之间的相互作用是相关的.
- 对于小分子抑制剂来说,CBP/ p300 KIX域是一个具有挑战性的目标,因为它具有多个结合点,与其他域具有结构相似性,多个结合伙伴,以及结构灵活性.
研究的目的:
- 开发一种针对Myb-CBP/ p300 KIX相互作用的高特异性和强大的小分子抑制剂.
- 研究开发的抑制剂在AML细胞中阻断Myb驱动的基因表达的有效性.
主要方法:
- 设计和合成一个双位元抑制剂,MybLL-tide.
- 针对CBP/p300 KIX域和其他协同激活器域的MybLL-tide的亲和性和选择性分析.
- 在蛋白质学上评估MybLL-tide在AML细胞中抑制Myb·KIX依赖基因表达的能力.
主要成果:
- MybLL-tide对CBP/ p300 KIX域的皮科莫尔亲和力显著高于之前报告的化合物.
- 该抑制剂表现出异常的选择性,CBP/ p300 KIX域比其他协同激活剂域优于5600倍.
- 在细胞中,MybLL-tide有效地阻断了CBP和p300与Myb的结合,从而抑制了AML细胞中关键的Myb·KIX依赖基因.
结论:
- MybLL-tide是一种高度有效和可修改的工具,用于选择性地准CBP/p300 KIX域.
- 这种抑制剂可用于评估AML细胞的转录效应,并可能用于其他异常Myb活性的癌症.
- 双位点抑制策略有望针对具有多个结合表面的其他具有挑战性的协同激活器领域.
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