特定序列的DNA结合分子的设计,用于DNA甲基转移酶抑制
JeenJoo S Kang1, Jordan L Meier, Peter B Dervan
1Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.
Journal of the American Chemical Society
|February 8, 2014
概括
研究人员开发了新的小分子,以准DNA甲基化控制的CPG位点. 一个分子,发针3,有效地抑制了DNA甲基转移酶活性,为新的表观遗传疗法提供了基础.
科学领域:
- 化学生物学 化学生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- CpG二是关键的基因组元素,参与DNA甲基化和基因调节.
- 针对CpG二的小分子对于调节转录活性是有价值的.
- 小沟结合的寡合物为特定序列的CpG识别提供了一个潜在的策略.
研究的目的:
- 为了评估头的pyrrole-imidazole聚胺在识别CpG序列中的有效性.
- 研究这些聚胺的结合方向和特异性.
- 为设计制CpG甲基化的小分子奠定基础.
主要方法:
- 对5'-CGCG-3'序列进行选,以检测发针烯-意米达聚胺的库.
- 使用下一代测序来公正评估测序特异性.
- 评估已识别的聚胺对DNA甲基转移酶活性的抑制.
主要成果:
- 头发针聚胺PyImβIm-γ-PyImβIm (1) 意外地有利于5'-GCGC-3'结合的逆方向.
- 对PyImPyIm-γ-PyImβIm (3) 的修改恢复了向前方向的5'-CGCG-3'偏好.
- 与聚胺1相比,头发针3表现出更好的DNA甲基转移酶活性抑制.
结论:
- role-imidazole聚胺可以被设计为特定的CpG序列识别和结合方向.
- 头发针聚胺3作为一个强大的抑制剂的DNA甲基转移酶活动在它的目标部位.
- 这些发现为开发CpG甲基化序列特异性抗体提供了分子框架.
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