Imaging enzyme-triggered self-assembly of small molecules inside live cells.

Imaging enzyme-triggered self-assembly of small molecules inside live cells.
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DOI:
10.1038/ncomms2040
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发表时间:
2012
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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小分子在水中自组装形成纳米纤维,除了产生复杂的生物材料外,还有望在细胞内建立一个简单的系统来调节细胞过程。但是,缺乏一种方便的方法来研究细胞内小分子的自组装阻碍了这种系统的发展。在这里,我们报告了一种方法来图像酶触发的活细胞内的小分子自组装。在将荧光团连接到自组装基序以制备前体之后,我们通过31 P NMR和流变学证实,酶触发的前体向水凝胶因子的转化导致通过自组装形成水凝胶。由水凝胶因子的纳米纤维赋予的成像对比度允许评价细胞内自组装;水凝胶因子的纳米纤维在活细胞中的动力学和定位。这种方法探索了细胞内的超分子化学,并可能在化学和生物学的界面上产生新的见解,过程或材料。
Self-assembly of small molecules in water to form nanofibers, besides generating sophisticated biomaterials, promises a simple system inside cells for regulating cellular processes. But lack of a convenient approach for studying the self-assembly of small molecules inside cells hinders the development of such systems. Here we report a method to image enzyme-triggered self-assembly of small molecules inside live cells. After linking a fluorophore to a self-assembly motif to make a precursor, we confirmed by 31P NMR and rheology that enzyme-triggered conversion of the precursor to a hydrogelator results in the formation of a hydrogel via self-assembly. The imaging contrast conferred by the nanofibers of the hydrogelators allowed the evaluation of intracellular self-assembly; the dynamics, and the localization of the nanofibers of the hydrogelators in live cells. This approach explores supramolecular chemistry inside cells and may lead to new insights, processes, or materials at the interface of chemistry and biology.
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