Abstract
DNA nanostructures often involve temporally evolving spatial features. Tracking these temporal behaviors in real time requires sophisticated experimental methods with sufficiently high spatial and temporal resolution. Among the several strategies developed for this purpose, single-molecule FRET (smFRET) offers avenues to observe the structural rearrangement or locomotion of DNA nanostructures in real time and quantitatively measure the kinetics as well at the single nanostructure level. In this mini review, we discuss a few applications of smFRET-based techniques to study DNA nanostructures. These examples exemplify how smFRET signals not only have played an important role in the characterization of the nanostructures but also often have helped to improve the design and overall performance of the nanostructures and the devices designed from those structures. Overall, this review consolidates the potential of smFRET in providing crucial quantitative information on structure–function relations in DNA nanostructures.
Highlights
Dynamic DNA nanostructures primarily function by undergoing controlled structural rearrangement or motion, building nanoscale devices
DNA distortion by transcription factor TATA-binding protein (TBP) under tension was studied by assembling the complex on a DNA origami-based force clamp. single-molecule FRET (smFRET) signals were used as a direct readout for quantifying the DNA distortion by TBP under tension (Nickels et al, 2016)
We have presented a consolidated summary on characterization of DNA nanostructures at single nanostructure level by using smFRET
Summary
Among the several strategies developed for this purpose, single-molecule FRET (smFRET) offers avenues to observe the structural rearrangement or locomotion of DNA nanostructures in real time and quantitatively measure the kinetics as well at the single nanostructure level. In this mini review, we discuss a few applications of smFRET-based techniques to study DNA nanostructures. We discuss a few applications of smFRET-based techniques to study DNA nanostructures These examples exemplify how smFRET signals have played an important role in the characterization of the nanostructures and often have helped to improve the design and overall performance of the nanostructures and the devices designed from those structures.
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