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Toward quantitative fluorescence microscopy with DNA origami nanorulers
Susanne Beater1, Mario Raab1, Philip Tinnefeld1
1Braunschweig University of Technology, Institute for Physical & Theoretical Chemistry and Braunschweig Integrated Centre of Systems Biology, Braunschweig, Germany.
Methods in Cell Biology
|June 30, 2014
Summary
DNA origami nanostructures serve as scaffolds for quantifying fluorescence microscope performance. Optimal nanorulers feature intermark distances approximately 1.3 times the expected optical resolution for enhanced sensitivity and resolution measurements.
Area of Science:
- Nanotechnology
- Biophysics
- Optical Microscopy
Background:
- Advanced fluorescence microscopy techniques increasingly overcome the diffraction limit.
- Quantifying microscope performance, such as sensitivity and resolution, is crucial for technique development.
Purpose of the Study:
- To utilize DNA origami nanostructures as scaffolds for precise quantification of microscope properties.
- To develop and present various DNA origami nanorulers for calibration and performance assessment.
Main Methods:
- Employing DNA origami to create nanostructures with precisely placed fluorescent dyes in defined geometries.
- Designing nanorulers with controlled labeling density and inter-dye distances.
- Simulating fluorescence images of DNA origami nanorulers to determine optimal design parameters.
Main Results:
- Demonstrated DNA origami nanorulers with defined labeling density and distances between marks.
- Introduced novel triangular DNA origami nanorulers usable with transient binding imaging.
- Simulation revealed optimal intermark distance is ~1.3x expected optical resolution.
Conclusions:
- DNA origami nanostructures offer a versatile platform for creating calibration standards in fluorescence microscopy.
- The choice of intermark distance in nanorulers is critical and should be tailored to the expected optical resolution.
- These nanorulers facilitate accurate characterization of super-resolution microscopy techniques.
