School of Chemical Sciences, Goa University, Taleigao Plateau, Goa, 403206, India.
Polymers and Functional Materials Division CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India.
Sci Rep. 2022 Jul 7;12(1):11526. doi: 10.1038/s41598-022-15890-4.
A novel tetraphenylethylene (TPE) functionalized aminoglycoside antibiotic kanamycin (TPE-kana 1) has been successfully synthesized and characterized by means of modern analytical and spectroscopic techniques. The probe TPE-kana 1 showed strong affinity towards bovine serum albumin (BSA) compared to its other biological competitors. The recognition of BSA have been investigated employing UV-Vis absorption and fluorescence emission spectroscopy. The significant color change of TPE-kana 1 with BSA can be observed by necked eye, where the role of AIE-active TPE molecule is handle in both optical and colorimetric changes. The quenching of fluorescence of TPE-kana 1 with BSA was characterized by fluorescence spectroscopy, with 71.16% of quenching efficiency. Moreover, the Stern-Volmer quenching constant was calculated and found to be 2.46 × 10 M. Probe TPE-kana 1 showed detection limit of 2.87 nM (nM) towards BSA with binding constant 7.56 × 10 M. A molecular docking study is also performed to investigate the detail interactions between TPE-kana 1 with the sites of BSA via non-covalent i.e., H-bonding, π-cation interactions, π-donor hydrogen bonds and π-π interactions. The lowest binding energy conformation was found at - 10.42 kcal/mol.
一种新型的四苯乙烯（TPE）功能化氨基糖苷抗生素卡那霉素（TPE-kana 1）已通过现代分析和光谱技术成功合成和表征。与其他生物竞争物相比，探针 TPE-kana 1 对牛血清白蛋白（BSA）具有很强的亲和力。通过紫外-可见吸收和荧光发射光谱研究了对 BSA 的识别。可以通过颈状眼睛观察到 TPE-kana 1 与 BSA 的显著颜色变化，其中 AIE 活性 TPE 分子在光学和比色变化中都起着作用。通过荧光光谱对 TPE-kana 1 与 BSA 的荧光猝灭进行了表征，猝灭效率为 71.16%。此外，还计算了 Stern-Volmer 猝灭常数，发现其为 2.46×10 M。探针 TPE-kana 1 对 BSA 的检测限为 2.87 nM（nM），结合常数为 7.56×10 M。还进行了分子对接研究，以通过非共价即氢键、π-阳离子相互作用、π-供体氢键和π-π相互作用来研究 TPE-kana 1 与 BSA 位点之间的详细相互作用。发现最低结合能构象为-10.42 kcal/mol。
