New Triplex Origami Technique Enables Control Over dsDNA

Scientists from Aarhus University have developed a new method to engineer and study the compaction of double-stranded DNA. Published in Advanced Materials, the technique called triplex origami, is based on Hoogsteen interactions, and is used to organize and fold double-stranded DNA into compacted structures. This method provides unprecedented control over the shape of DNA, enabling the creation of diverse structures ranging from two-dimensional shapes to intricate 3D constructs. The researchers believe that triplex origami may offer insights into the natural compaction of genetic DNA, shedding light on fundamental biological processes.

The study also revealed that the triplex origami technique provides protection against enzymatic degradation, making it potentially valuable in gene therapy. By encoding missing functions into a piece of double-stranded DNA, scientists could repair diseased cells. Moreover, the ability to compact and protect DNA using this method has broad implications for applications in therapeutics, diagnostics, and nanoscale materials engineering. The discovery of Hoogsteen interactions as a powerful tool for organizing double-stranded DNA represents a significant expansion in the field of DNA nanotechnology, which has traditionally relied on Watson-Crick base interactions.

While the triplex origami method currently requires long stretches of purine bases, which are not typically found in natural genetic DNA, the researchers used artificial DNA sequences to overcome this limitation. In the future, they aim to address this constraint and work toward applying the technique to natural genetic DNA. The development of this innovative methodology opens up exciting possibilities for manipulating DNA structures, advancing scientific research, and potentially revolutionizing gene therapy and nanoscale engineering applications.