Development of a Smart Fluorescent Probe Specifically Interacting with C-Myc I-Motif.

Development of a Smart Fluorescent Probe Specifically Interacting with C-Myc I-Motif.
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DOI:
10.3390/ijms23073872
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发表时间:
2022-03-31
影响因子:
5.6
通讯作者:
Li D
Li D
中科院分区:
生物学2区
文献类型:
--
作者:
Wei Z;Liu B;Lin X;Wang J;Huang ZS;Li D

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i -motif在生物过程中发挥着关键的调节作用,作为有吸引力的治疗靶点具有很大的潜力。在本研究中,我们开发了一种新的荧光探针G59,它与c-myc基因启动子i-motif有很强的选择性结合。G59具有与萘酰亚胺荧光基团偶联的i基序结合咔唑基团。G59可以通过选择性激活其荧光来区分c-myc i-motif与其他DNA结构,并在溶液中具有明显的可视化效果。智能探针G59对c-myc i-motif具有良好的灵敏度,具有较低的荧光检测限(154 nM)和有效的稳定性。G59可作为中性拥挤条件下无标记筛选选择性c-myc i基序结合配体的快速灵敏探针。据我们所知,G59是第一个用于识别i-motif结构和筛选选择性结合配体的高灵敏度荧光探针。
I-motifs play key regulatory roles in biological processes, holding great potential as attractive therapeutic targets. In the present study, we developed a novel fluorescent probe G59 with strong and selective binding to the c-myc gene promoter i-motif. G59 had an i-motif-binding carbazole moiety conjugated with naphthalimide fluorescent groups. G59 could differentiate the c-myc i-motif from other DNA structures through selective activation of its fluorescence, with its apparent visualization in solution. The smart probe G59 showed excellent sensitivity, with a low fluorescent detection limit of 154 nM and effective stabilization to the c-myc i-motif. G59 could serve as a rapid and sensitive probe for label-free screening of selective c-myc i-motif binding ligands under neutral crowding conditions. To the best of our knowledge, G59 is the first fluorescent probe with high sensitivity for recognizing the i-motif structure and screening for selective binding ligands.
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