Gaining insights into the small molecule targeting of the G-quadruplex in the c-MYC promoter using NMR and an allele-specific transcriptional assay.

Gaining insights into the small molecule targeting of the G-quadruplex in the c-MYC promoter using NMR and an allele-specific transcriptional assay.
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DOI:
10.1007/128_2012_333
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发表时间:
2013
影响因子:
8.6
通讯作者:
Hurley, Laurence H.
Hurley, Laurence H.
中科院分区:
化学2区
文献类型:
--
作者:
Kaiser, Christine E.;Gokhale, Vijay;Yang, Danzhou;Hurley, Laurence H.

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G-四链体(四链DNA二级结构)显示出作为抗癌治疗新靶点的前景。具体地说,调控基因近端启动子区域的G-四链体有可能充当沉默元件,从而关闭转录。因此,能够结合并稳定G-四链体的化合物将是非常有益的。在本章中,我们描述了我们实验室最近的两项研究。在第一种情况下,我们使用NMR来阐明c-MYC启动子中小分子和G-四链体之间的2:1复合物的结构。在第二种情况下,我们使用等位基因特异性转录测定来证明G-四链体相互作用化合物的作用直接通过G-四链体介导。最后,我们利用这些信息提出各种小分子与c-MYC G-四链体相互作用的模型。
G-quadruplexes (four-stranded DNA secondary structures) are showing promise as new targets for anticancer therapies. Specifically, G-quadruplexes in the proximal promoter region of regulatory genes have the potential to act as silencer elements and thereby turn off transcription. Thus, compounds that are capable of binding to and stabilizing G-quadruplexes would be of great benefit. In this chapter we describe two recent studies from our labs. In the first case, we use NMR to elucidate the structure of a 2:1 complex between a small molecule and the G-quadruplex in the c-MYC promoter. In the second case, we use an allele-specific transcription assay to demonstrate that the effect of a G-quadruplex-interactive compound is mediated directly through the G-quadruplex. Finally, we use this information to propose models for the interaction of various small molecules with the c-MYC G-quadruplex.
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