Stabilisation of self-assembled DNA crystals by triplex-directed photo-cross-linking

Hatem O. Abdallah, Yoel P. Ohayon, Arun Richard Chandrasekaran, Ruojie Sha, Keith R. Fox, Tom Brown, David A. Rusling, Chengde Mao, Nadrian C. Seeman

Research output: Contribution to journalArticlepeer-review


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 languageEnglish
Pages (from-to)8014-8017
Number of pages4
JournalChemical Communications
Issue number51
Early online date6 Jun 2016
Publication statusPublished - 28 Jun 2016


  • cross-linking reagents/chemistry
  • crystallization
  • DNA/chemical synthesis
  • nucleic acid conformation
  • photochemical processes
  • temperature
  • trioxsalen/chemistry


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