Journal
NATURE CHEMISTRY
Volume 12, Issue 11, Pages 1067-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41557-020-0539-8
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Funding
- US National Science Foundation
- National Key R&D Program of China [2018YFA0902600]
- NSFC [21991134, 21834007, 21904060, 21675167]
- innovative research team of high-level local universities in Shanghai
- K. C. Wong Foundation at Shanghai Jiao Tong University
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DNA origami has emerged as a highly programmable method to construct customized objects and functional devices in the 10-100 nm scale. Scaling up the size of the DNA origami would enable many potential applications, which include metamaterial construction and surface-based biophysical assays. Here we demonstrate that a six-helix bundle DNA origami nanostructure in the submicrometre scale (meta-DNA) could be used as a magnified analogue of single-stranded DNA, and that two meta-DNAs that contain complementary 'meta-base pairs' can form double helices with programmed handedness and helical pitches. By mimicking the molecular behaviours of DNA strands and their assembly strategies, we used meta-DNA building blocks to form diverse and complex structures on the micrometre scale. Using meta-DNA building blocks, we constructed a series of DNA architectures on a submicrometre-to-micrometre scale, which include meta-multi-arm junctions, three-dimensional (3D) polyhedrons, and various 2D/3D lattices. We also demonstrated a hierarchical strand-displacement reaction on meta-DNA to transfer the dynamic features of DNA into the meta-DNA. This meta-DNA self-assembly concept may transform the microscopic world of structural DNA nanotechnology.
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