Department of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, China.
Biosens Bioelectron. 2012 Jan 15;31(1):84-9. doi: 10.1016/j.bios.2011.09.042. Epub 2011 Oct 6.
A new type of molecularly imprinted polymer (MIP)-based fluorescent artificial receptor was developed by anchoring MIP on the surface of denatured bovine serum albumin (dBSA) modified CdTe quantum dots (QDs) using the surface molecular imprinting process. The approach combined the merits of molecular imprinting technology and the fluorescent property of the CdTe QDs. The dBSA was used not only to modify the surface defects of the CdTe QDs, but also as assistant monomer to create effective recognition sites. Three different proteins, namely lysozyme (Lyz), cytochrome c (Cyt) and methylated bovine serum albumin (mBSA), were tested as the template molecules and then the receptors were synthesized by sol-gel reaction (imprinting process). The results of fluorescence and binding experiments demonstrated the recognition performance of the receptors toward the corresponding template. Under optimum conditions, the linear range for Lyz was from 1.4×10(-8) to 8.5×10(-6) M, and the detection limit was 6.8 nM. Moreover, the new artificial receptors were applied to separate and detect Lyz in real samples. This fluorescent artificial receptor may serve as a starting point in the design of highly effective synthetic fluorescent receptor for recognition of target protein.
一种新型的基于分子印迹聚合物(MIP)的荧光人工受体是通过表面分子印迹过程将 MIP 锚定在变性牛血清白蛋白(dBSA)修饰的碲化镉量子点(QDs)表面上而开发的。该方法结合了分子印迹技术和 CdTe QDs 的荧光特性的优点。dBSA 不仅用于修饰 CdTe QDs 的表面缺陷,而且还用作辅助单体以创建有效的识别位点。三种不同的蛋白质,即溶菌酶(Lyz)、细胞色素 c(Cyt)和甲基化牛血清白蛋白(mBSA),被用作模板分子,然后通过溶胶-凝胶反应(印迹过程)合成了受体。荧光和结合实验的结果证明了受体对相应模板的识别性能。在最佳条件下,Lyz 的线性范围为 1.4×10(-8)至 8.5×10(-6) M,检测限为 6.8 nM。此外,新的人工受体被应用于实际样品中 Lyz 的分离和检测。这种荧光人工受体可以作为设计用于识别目标蛋白质的高效合成荧光受体的起点。