Issue 42, 2020

Hybrid DNA/RNA nanostructures with 2′-5′ linkages

Abstract

Nucleic acid nanostructures with different chemical compositions have shown utility in biological applications as they provide additional assembly parameters and enhanced stability. The naturally occurring 2′-5′ linkage in RNA is thought to be a prebiotic analogue and has potential use in antisense therapeutics. Here, we report the first instance of DNA/RNA motifs containing 2′-5′ linkages. We synthesized and incorporated RNA strands with 2′-5′ linkages into different DNA motifs with varying number of branch points (a duplex, four arm junction, double crossover motif and tensegrity triangle motif). Using experimental characterization and molecular dynamics simulations, we show that hybrid DNA/RNA nanostructures can accommodate interspersed 2′-5′ linkages with relatively minor effect on the formation of these structures. Further, the modified nanostructures showed improved resistance to ribonuclease cleavage, indicating their potential use in the construction of robust drug delivery vehicles with prolonged stability in physiological conditions.

Graphical abstract: Hybrid DNA/RNA nanostructures with 2′-5′ linkages

Supplementary files

Article information

Article type
Communication
Submitted
07 Aug 2020
Accepted
16 Oct 2020
First published
22 Oct 2020

Nanoscale, 2020,12, 21583-21590

Hybrid DNA/RNA nanostructures with 2′-5′ linkages

A. R. Chandrasekaran, J. Mathivanan, P. Ebrahimi, J. Vilcapoma, A. A. Chen, K. Halvorsen and J. Sheng, Nanoscale, 2020, 12, 21583 DOI: 10.1039/D0NR05846G

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