Toward larger DNA origami

Nano Lett. 2014 Oct 8;14(10):5740-7. doi: 10.1021/nl502626s. Epub 2014 Sep 8.

Abstract

Structural DNA nanotechnology, and specifically scaffolded DNA origami, is rapidly developing as a versatile method for bottom-up fabrication of novel nanometer-scale materials and devices. However, lengths of conventional single-stranded scaffolds, for example, 7,249-nucleotide circular genomic DNA from the M13mp18 phage, limit the scales of these uniquely addressable structures. Additionally, increasing DNA origami size generates the cost burden of increased staple-strand synthesis. We addressed this 2-fold problem by developing the following methods: (1) production of the largest to-date biologically derived single-stranded scaffold using a λ/M13 hybrid virus to produce a 51 466-nucleotide DNA in a circular, single-stranded form and (2) inexpensive DNA synthesis via an inkjet-printing process on a chip embossed with functionalized micropillars made from cyclic olefin copolymer. We have experimentally demonstrated very efficient assembly of a 51-kilobasepair origami from the λ/M13 hybrid scaffold folded by chip-derived staple strands. In addition, we have demonstrated two-dimensional, asymmetric origami sheets with controlled global curvature such that they land on a substrate in predictable orientations that have been verified by atomic force microscopy.

Keywords: DNA origami; Nanotechnology; hybrid bacteriophage; lambda DNA; on-chip DNA synthesis; structural DNA nanotechnology.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Bacteriophage lambda / chemistry
  • DNA / chemical synthesis
  • DNA / chemistry*
  • DNA, Viral / chemical synthesis
  • DNA, Viral / chemistry
  • Microscopy, Atomic Force
  • Nanostructures / chemistry*
  • Nanostructures / ultrastructure
  • Nanotechnology / methods*
  • Nucleic Acid Conformation

Substances

  • DNA, Viral
  • DNA