Branched kissing loops for the construction of diverse RNA homooligomeric nanostructures

Di Liu, Cody W. Geary, Gang Chen, Yaming Shao, Mo Li, Chengde Mao, Ebbe S. Andersen, Joseph A. Piccirilli, Paul W.K. Rothemund, Yossi Weizmann

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

In biological systems, large and complex structures are often assembled from multiple simpler identical subunits. This strategy—homooligomerization—allows efficient genetic encoding of structures and avoids the need to control the stoichiometry of multiple distinct units. It also allows the minimal number of distinct subunits when designing artificial nucleic acid structures. Here, we present a robust self-assembly system in which homooligomerizable tiles are formed from intramolecularly folded RNA single strands. Tiles are linked through an artificially designed branched kissing-loop motif, involving Watson–Crick base pairing between the single-stranded regions of a bulged helix and a hairpin loop. By adjusting the tile geometry to gain control over the curvature, torsion and the number of helices, we have constructed 16 different linear and circular structures, including a finite-sized three-dimensional cage. We further demonstrate cotranscriptional self-assembly of tiles based on branched kissing loops, and show that tiles inserted into a transfer RNA scaffold can be overexpressed in bacterial cells.

Original languageEnglish
Pages (from-to)249-259
Number of pages11
JournalNature Chemistry
Volume12
Issue number3
DOIs
StatePublished - 1 Mar 2020

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)

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