title: Functional assembly of aptamer binding sites by single-molecule cut-and-paste.
abstract: Bottom up assembly of functional molecular ensembles with novel properties emerging from composition and arrangement of its constituents is a prime goal of nanotechnology. By single-molecule cut-and-paste we assembled binding sites for malachite green in a molecule-by-molecule assembly process from the two halves of a split aptamer. We show that only a perfectly joined binding site immobilizes the fluorophore and enhances the fluorescence quantum yield by several orders of magnitude. To corroborate the robustness of this approach we produced a micrometer-sized structure consisting of more than 500 reconstituted binding sites. To the best of our knowledge, this is the first demonstration of one by one bottom up functional biomolecular assembly.
authors.affiliation: Center for Nanoscience and Department of Physics, University of Munich, Amalienstrasse 54, 80799 Munich, Germany.
authors.forename: Mathias
authors.initials: M
authors.lastname: Strackharn
authors.forename: Stefan W
authors.initials: SW
authors.lastname: Stahl
authors.forename: Elias M
authors.initials: EM
authors.lastname: Puchner
authors.forename: Hermann E
authors.initials: HE
authors.lastname: Gaub