结合共抑制剂和伊诺西四酸盐的HDAC3的结构
Peter J Watson1, Louise Fairall, Guilherme M Santos
1Henry Wellcome Laboratories of Structural Biology, Department of Biochemistry, University of Leicester, Leicester LE1 9HN, UK.
Nature
|January 11, 2012
概括
基因组脱乙酶 (HDACs) 是癌症的关键目标. 研究人员发现,一种伊诺西四酸盐分子作为分子剂,使HDAC3和共同抑制剂复合体形成,用于基因调节.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 基因脱乙酶 (HDACs) 调节基因表达,是癌症药物的关键标.
- 第I类HDAC通常需要共抑制剂复合物来进行酶活性.
- 了解HDAC-共抑制剂相互作用对于开发向癌症疗法至关重要.
研究的目的:
- 为了阐明人类HDAC3复合体形成的结构基础,使用SMRT联合抑制剂.
- 确定介导HDAC3-SMRT复合体组装的关键分子相互作用.
- 探索小分子在调节HDAC活动中的作用.
主要方法:
- 用X射线晶体学来确定人类HDAC3-SMRT复合物的结构.
- 生物化学试验以评估复杂形成对伊诺西四酸盐的依赖性.
- 结构分析以确定关键的结合接口和分子相互作用.
主要成果:
- 该结构显示,复合体形成时,SMRT脱乙酶激活域 (DAD) 中发生了显著的构造变化.
- D-myo-inositol-(1,4,5,6)-tetrakisphosphate (Ins(1,4,5,6) P4) 作为HDAC3和SMRT之间的一个重要的分子间桥梁.
- 复杂的组装非常依赖Ins{1,4,5,6) P4,这表明它的调节作用.
结论:
- 1,4,5,6) P4是HDAC3-SMRT复合体形成和激活的关键媒介.
- 通过伊诺西四酸盐激活HDAC的这种机制在物种之间得到保护.
- 这些发现为针对癌症中HDACs的治疗策略开辟了新的途径.
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