作者:Karen L. Christman、Rebecca M. Broyer、Zachary P. Tolstyka、Heather D. Maynard
DOI:10.1039/b618002g
日期:——
Immobilizing proteins in specific orientations is important for diagnostic protein arrays, biomaterials, and other applications where retention of bioactivity is essential. We report an approach for protein micropatterning that exploits a chemoselective reaction to conjugate proteins at the N-terminus to polymer films. A copolymer from 2-hydroxyethyl methacrylate and a Boc-protected aminooxy tetra(ethylene glycol) methacrylate was synthesized by radical polymerization. Boc groups were locally deprotected using photoacid generator-based photolithography. Micropatterns were verified by fluorescence microscopy utilizing green fluorescent aldehyde microspheres. Streptavidin that was subjected to a transamination reaction to install an α-ketoamide group at the N-terminus was conjugated to the patterns by oxime bond formation. Since the majority of proteins may be modified to contain a reactive carbonyl group, this methodology should be applicable to pattern a wide variety of proteins specifically through the N-terminus.
在特定方向上固定蛋白质对于诊断蛋白质阵列、生物材料及其他需要保持生物活性的应用至关重要。我们报告了一种蛋白质微图案化的方法,该方法利用化学选择性反应将蛋白质的N-末端与聚合物薄膜连接。通过自由基聚合法合成了由2-羟基乙基甲基丙烯酸酯和Boc保护的氨氧基四乙烯醇甲基丙烯酸酯组成的共聚物。 Boc基团通过基于光酸发生器的光刻技术进行局部去保护。微图案通过荧光显微镜中的绿色荧光醛微球进行验证。经过转氨反应使得N-末端安装了α-酮酰胺基团的链霉亲和素通过肟键形成与图案结合。由于大多数蛋白质可以修改为含有反应性羰基,因此该方法应该适用于特定地通过N-末端对多种蛋白质进行图案化。