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A Quadrupolar Bis-Triarylborane Chromophore as a Fluorimetric and Chirooptic Probe for Simultaneous and Selective Sensing of DNA, RNA and Proteins.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-01-22 , DOI: 10.1002/chem.201903936
Željka Ban 1 , Stefanie Griesbeck 2 , Sanja Tomić 1 , Jörn Nitsch 2 , Todd B Marder 2 , Ivo Piantanida 1
Affiliation  

A water-soluble tetracationic quadrupolar bis-triarylborane chromophore showed strong binding to ds-DNA, ds-RNA, ss-RNA, as well as to the naturally most abundant protein, BSA. The novel dye can distinguish between DNA/RNA and BSA by fluorescence emission separated by Δ ν ˜ =3600 cm-1 , allowing for the simultaneous quantification of DNA/RNA and protein (BSA) in a mixture. The applicability of such fluorimetric differentiation in vitro was demonstrated, strongly supporting a protein-like target as a dominant binding site of 1 in cells. Moreover, our dye also bound strongly to ss-RNA, with the unusual rod-like structure of the dye, decorated by four positive charges at its termini and having a hydrophobic core, acting as a spindle for wrapping A, C and U ss-RNAs, but not poly G, the latter preserving its secondary structure. To the best of our knowledge, such unmatched, multifaceted binding activity of a small molecule toward DNA, RNA, and proteins and the selectivity of its fluorimetric and chirooptic response makes the quadrupolar bis-triarylborane a novel chromophore/fluorophore moiety for biochemical applications.

中文翻译:

四极双三芳基硼烷发色团作为荧光和手性光学探针,用于同时和选择性传感 DNA、RNA 和蛋白质。

水溶性四阳离子四极双三芳基硼烷发色团与 ds-DNA、ds-RNA、ss-RNA 以及天然最丰富的蛋白质 BSA 具有很强的结合力。这种新型染料可以通过Δν〜= 3600 cm-1分离的荧光发射来区分DNA/RNA和BSA,从而可以同时定量混合物中的DNA/RNA和蛋白质(BSA)。这种荧光区分在体外的适用性得到了证明,有力地支持了类蛋白靶标作为细胞中 1 的主要结合位点。此外,我们的染料还与 ss-RNA 牢固结合,具有不寻常的棒状结构,其末端有四个正电荷,并具有疏水核心,充当包裹 A、C 和 U ss-的纺锤体。 RNA,但不是聚 G,后者保留了其二级结构。据我们所知,小分子对 DNA、RNA 和蛋白质的这种无与伦比的多方面结合活性及其荧光和手性光学响应的​​选择性使得四极双三芳基硼烷成为用于生化应用的新型发色团/荧光团部分。
更新日期:2020-01-23
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