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Biomacromolecular nanostructures-based interfacial engineering: from precise assembly to precision biosensing

National Science Review 2018年第5期5卷 740-755页

作者： Fan Yang Xiaolei Zuo Chunhai Fan Xian-En Zhang Division of Physical Biology & Bioimaging Center Shanghai Synchrotron Radiation FacilityShanghai Institute of Applied PhysicsChinese Academy of Sciences National Key Laboratory of Biomacromolecules CAS Excellence Center for BiomacromoleculesInstitute of BiophysicsChinese Academy of Sciences School of Laboratory Medicine Hubei University of Chinese Medicine

Biosensors are a type of important biodevice that integrate biological recognition elements, such as enzyme,antibody and DNA, and physical or chemical transducers, which have revolutionized clinical diagnosis especially under the context of point-of-care tests. Since the performance of a biosensor depends largely on the bio–solid interface, design and engineering of the interface play a pivotal role in developing quality biosensors. Along this line, a number of strategies have been developed to improve the homogeneity of the interface or the precision in regulating the interactions between biomolecules and the interface. Especially,intense efforts have been devoted to controlling the surface chemistry, orientation of immobilization,molecular conformation and packing density of surface-confined biomolecular probes(proteins and nucleic acids). By finely tuning these surface properties, through either gene manipulation or self-assembly, one may reduce the heterogeneity of self-assembled monolayers, increase the accessibility of target molecules and decrease the binding energy barrier to realize high sensitivity and specificity. In this review, we summarize recent progress in interfacial engineering of biosensors with particular focus on the use of protein and DNA nanostructures. These biomacromolecular nanostructures with atomistic precision lead to highly regulated interfacial assemblies at the nanoscale. We further describe the potential use of the high-performance biosensors for precision diagnostics.

关键词： biosensor interface engineering homogeneity orientation control fused proteins DNA nanostructures

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