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The tensegrity triangle is a robust DNA motif that can self-assemble to generate macroscopic three-dimensional crystals. However, the stability of these crystals is dependent on the high ionic conditions used for crystal growth. Here we demonstrate that a triplex-forming oligonucleotide can be used to direct the specific intercalation, and subsequent photo-cross-linking, of 4,5',8-trimethylpsoralen to single or multiple loci within or between the tiles of the crystal. Cross-linking between the tiles of the crystal improves their thermal stability. Such an approach is likely to facilitate the removal of crystals from their mother liquor and may prove useful for applications that require greater crystal stability.

Original publication

DOI

10.1039/c6cc03695c

Type

Journal article

Journal

Chem Commun (Camb)

Publication Date

28/06/2016

Volume

52

Pages

8014 - 8017

Keywords

Cross-Linking Reagents, Crystallization, DNA, Nucleic Acid Conformation, Photochemical Processes, Temperature, Trioxsalen