title: Cyclic Peptide-Decorated Self-Assembled Nanohybrids for Selective Recognition and Detection of Multivalent RNAs.
abstract: Although there has been substantial advancement in the development of nanostructures, the development of self-assembled nanostructures that can selectively recognize multivalent targets has been very difficult. Here we show the proof of concept that topology-controlled peptide nanoassemblies can selectively recognize and detect a multivalent RNA target. We compared the differential behaviors of peptides in a linear or cyclic topology in terms of peptide-gold nanoparticle hybrid nanostructure formation, conformational stabilization, monovalent and multivalent RNA binding in vitro, and multivalent RNA recognition in live cells. When the topology-dependent selectivity amplification of the cyclic peptide hybrids is combined with the noninvasive nature of dark-field microscopy, the cellular localization of the viral Rev response element (RRE) RNA can be monitored in situ. Because intracellular interactions are often mediated by overlapping binding partners with weak affinity, the topology-controlled peptide assemblies can provide a versatile means to convert weak ligands into multivalent ligands with high affinity and selectivity.
authors.affiliation: Translational Research Center for Protein Function Control and Department of Materials Science and Engineering, Yonsei University , Seoul 03722, Korea.
authors.forename: Jun Shik
authors.initials: JS
authors.lastname: Choi
authors.affiliation: Translational Research Center for Protein Function Control and Department of Materials Science and Engineering, Yonsei University , Seoul 03722, Korea.
authors.forename: So-hee
authors.initials: SH
authors.lastname: Han
authors.affiliation: Translational Research Center for Protein Function Control and Department of Materials Science and Engineering, Yonsei University , Seoul 03722, Korea.
authors.forename: Hyoseok
authors.initials: H
authors.lastname: Kim
authors.affiliation: Translational Research Center for Protein Function Control and Department of Materials Science and Engineering, Yonsei University , Seoul 03722, Korea.
authors.forename: Yong-Beom
authors.initials: YB
authors.lastname: Lim
mesh_terms: D046529:Microscopy, Electron, Transmission; D049329:Nanostructures; D010456:Peptides, Cyclic / Q000737:chemistry*; D012313:RNA / Q000737:chemistry*
chemical_list: D010456:Peptides, Cyclic; D012313:RNA