Thioflavin T as a fluorescence light-up probe for G4 formation.

Thioflavin T as a fluorescence light-up probe for G4 formation.
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DOI:
10.1093/nar/gku111
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发表时间:
2014-04
影响因子:
14.9
通讯作者:
Mergny JL
Mergny JL
中科院分区:
生物学2区
文献类型:
--
作者:
Renaud de la Faverie A;Guédin A;Bedrat A;Yatsunyk LA;Mergny JL

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在G -四链体结构(如由人类端粒基序形成的结构)存在的情况下,硫黄素T(ThT)会发出荧光。在本报告中,我们扩展并归纳了这些观察结果,并表明这种染料可用作一种便捷且特异的四链体探针。在大多数(但不是全部)能形成G4的序列存在时,我们观察到ThT荧光发射大幅增强,而对照双链和单链的存在对发射的影响较为有限。这种差异行为使我们能够设计一种高通量检测方法来检测G4的形成。利用简单的荧光酶标仪,可同时对数百种不同的寡核苷酸进行G4形成检测。我们将该技术应用于一类先前未被认定为能形成G4的序列的适体,并证明ThT荧光信号可用于预测G4的形成。
Thioflavin T (ThT) becomes fluorescent in the presence of the G-quadruplex structure such as that formed by the human telomeric motif. In this report, we extend and generalize these observations and show that this dye may be used as a convenient and specific quadruplex probe. In the presence of most, but not all, G4-forming sequences, we observed a large increase in ThT fluorescence emission, whereas the presence of control duplexes and single strands had a more limited effect on emission. This differential behavior allowed us to design a high-throughput assay to detect G4 formation. Hundreds of different oligonucleotides may be tested in parallel for G4 formation with a simple fluorescence plate reader. We applied this technique to a family of aptamers not previously recognized as G4-forming sequences and demonstrated that ThT fluorescence signal may be used to predict G4 formation.
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