Linker Engineering of Ligand-Decorated DNA Origami Nanostructures Affects Biological Activity

Carmen M. Domínguez, Miguel García-Chamé, Ulrike Müller, Andreas Kraus, Klavdiya Gordiyenko, Ahmad Itani, Heiko Haschke, Peter Lanzerstorfer, Kersten S. Rabe, Christof M. Niemeyer

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

News from an old acquaintance: The streptavidin (STV)-biotin binding system is frequently used for the decoration of DNA origami nanostructures (DON) to study biological systems. Here, a surprisingly high dynamic of the STV/DON interaction is reported, which is affected by the structure of the DNA linker system. Analysis of different mono- or bi-dentate linker architectures on DON with a novel high-speed atomic force microscope (HS-AFM) enabling acquisition times as short as 50 ms per frame gave detailed insights into the dynamics of the DON/STV interaction, revealing dwell times in the sub-100 millisecond range. The linker systems are also used to present biotinylated epidermal growth factor on DON to study the activation of the epidermal growth factor receptor signaling cascade in HeLa cells. The studies confirm that cellular activation correlated with the binding properties of linker-specific STV/DON interactions observed by HS-AFM. This work sheds more light on the commonly used STV/DON system and will help to further standardize the use of DNA nanostructures for the study of biological processes.

Original languageEnglish
Article number2202704
JournalSmall
Volume18
Issue number35
DOIs
Publication statusPublished - 1 Sep 2022

Keywords

  • cell signaling
  • DNA nanostructures
  • epidermal growth factor receptor (EGFR)
  • Grb2
  • high-speed AFM
  • receptor clustering
  • streptavidin

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