Protein–polymer conjugates have been developed in many fields. Most hybrids are composed of one protein attached to one or several polymer chains. The other form of hybrid involves the construction of multiple proteins on one polymer chain, thereby facilitating protein assemblies that provide multivalent effects. Unfortunately, synthetic methods for production of these types of hybrids are limited and challenging because precise control of the conjugation sites is needed. Herein, a novel synthetic polymer that can enzymatically assemble multiple proteins was developed. Polyacrylamide grafted with multiple microbial transglutaminase (MTG)-recognizable peptide derivatives was synthesized, and MTG-catalyzed site-specific conjugation of proteins with the polymer was achieved. The application for immunological biosensing was demonstrated using the assembly of a fusion protein composed of antibody-binding and enzyme moieties. This enzymatic method to synthesize a one-dimensional protein assembly on a synthetic polymer is versatile and can be expanded to a wide range of applications.
蛋白质-聚合物偶联物已在多个领域得到开发。大多数杂化物由一个蛋白质与一条或多条聚合物链组成。另一种形式的杂化涉及在一条聚合物链上构建多个蛋白质,从而促进产生多价效应的蛋白质组装。不幸的是,这些类型杂化物的合成方法有限且具有挑战性,因为需要精确控制偶联位点。本研究中,开发了一种能够酶促组装多个蛋白质的新型合成聚合物。合成了带有多个微
生物转谷
氨酰胺酶(
MTG)识别的肽衍
生物的聚
丙烯酰胺,并实现了
MTG催化的蛋白质与聚合物的位点特异性偶联。通过组装包含
抗体结合和酶结构域的融合蛋白,展示了其在免疫
生物传感中的应用。这种在合成聚合物上合成一维蛋白质组装的酶学方法具有多功能性,可扩展到广泛的应用领域。