Identification of new DNA i-motif binding ligands through a fluorescent intercalator displacement assay.

Identification of new DNA i-motif binding ligands through a fluorescent intercalator displacement assay.
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DOI:
10.1039/c7ob00710h
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发表时间:
2017-07-21
影响因子:
3.2
通讯作者:
Waller ZAE
Waller ZAE
中科院分区:
化学3区
文献类型:
--
作者:
Sheng Q;Neaverson JC;Mahmoud T;Stevenson CEM;Matthews SE;Waller ZAE

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这项工作描述了一种筛选 i-motif 结合化合物的新方法和几个新的配体家族,有可能用于 i-motif DNA 结构和功能的实验。 i-Motif 是由富含胞嘧啶的序列形成的四链体 DNA 结构,并通过插入的半质子化胞嘧啶-胞嘧啶碱基对结合在一起。这些序列普遍存在于基因启动子区域,并且可能在基因转录中发挥作用。用配体靶向这些结构可以提供一种靶向遗传疾病的新方法,但很少有配体已被证明与 i-motif DNA 相互作用。荧光嵌入剂置换 (FID) 测定是针对 DNA 二级结构筛选配体的简单方法。在这里,我们描述了噻唑橙如何与 i-motif DNA 相互作用,并评估其在 FID 测定中的使用能力。此外,我们报告了使用噻唑橙针对人类端粒的 i-motif 形成序列进行基于 FID 的配体筛选,以揭示具有进一步开发潜力的新 i-motif 结合化合物。
This work describes a new way to screen for i-motif binding compounds and several new families of ligands with potential for use in experiments into the structure and function of i-motif DNA. i-Motifs are quadruplex DNA structures formed from sequences rich in cytosine and held together by intercalated, hemi-protonated cytosine–cytosine base pairs. These sequences are prevalent in gene promoter regions and may play a role in gene transcription. Targeting these structures with ligands could provide a novel way to target genetic disease but there are very few ligands which have been shown to interact with i-motif DNA. Fluorescent intercalator displacement (FID) assays are a simple way to screen ligands against DNA secondary structures. Here we characterise how thiazole orange interacts with i-motif DNA and assess its ability for use in a FID assay. Additionally, we report FID-based ligand screening using thiazole orange against the i-motif forming sequence from the human telomere to reveal new i-motif binding compounds which have the potential for further development.
DOI: 10.1039/c3cc43495h
发表时间: 2013-01-01
影响因子: 4.9
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发表时间: 2015-08-01
期刊: BIOCHIMIE
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