Heavy Metal Stabilization of DNA Origami Nanostructures.

Area of Science:

• Nanotechnology
• Biochemistry
• Materials Science

Background:

• DNA origami enables precise 3D nanoscale structure fabrication.
• Current DNA origami applications are restricted by specific buffer requirements (high ionic strength, moderate temperatures, pH 5-10).

Purpose of the Study:

• To develop a method for stabilizing DNA origami nanostructures against diverse and harsh environmental conditions.
• To broaden the operational range and application scope of DNA origami.

Main Methods:

• Utilized the [PdCl4]2- complex to treat and stabilize DNA origami nanostructures.
• Tested structural integrity under mechanical compression, high temperatures (up to 100 °C), double-distilled water, and a wide pH range (4-12).
• Assessed stabilization of DNA origami superstructures and associated cargo.

Main Results:

• [PdCl4]2- effectively stabilized various DNA origami nanostructures against mechanical stress, thermal denaturation, and extreme pH.
• Stabilized structures maintained integrity in double-distilled water and up to 100 °C.
• Achieved high stabilization yields (up to 98%) for superstructures and bound cargos.
• Demonstrated applicability with a palladium metallization protocol at elevated temperatures.

Conclusions:

• [PdCl4]2- offers a simple and effective stabilization strategy for DNA origami.
• This method significantly expands the operating conditions for DNA origami applications.
• The approach holds promise for novel applications of DNA origami beyond conventional laboratory settings.