Innovative DNA Origami Biosensors Could Revolutionize Medical Diagnostics

**LMU researchers led by chemist Philip Tinnefeld have unveiled a groundbreaking strategy to create adaptable biosensors using DNA origami technology, which is detailed in their report published in Nature Nanotechnology.** Biosensors, integral to medical diagnostics and research, traditionally require custom development for each application. The LMU team's modular design facilitates easier adjustments for different target molecules and concentration ranges. The core of this technology is a DNA origami scaffold featuring two arms joined by a molecular hinge, each adorned with a fluorescent dye. This design utilizes fluorescence resonance energy transfer (FRET) to measure the distance between the dyes. When the structure transitions from a closed parallel state to an open angle of up to 90°, there's a notable change in the fluorescence signal. Senior author Viktorija Glembockyte notes this significant conformational change enhances signal clarity and precision. **Biosensors can be customized with docking sites for various biomolecular targets, such as nucleic acids, antibodies, and proteins.** The adaptability of the sensor is further refined by additional binding sites or stabilizing strands, enabling multiple molecular interactions to be assessed and controlled. Lead researcher Tinnefeld emphasizes the advantage of adjusting sensitivity without altering biomolecular interactions. Future enhancements are planned, including potential applications where biosensors monitor parameters and release active agents under specific conditions.