Twisted intercalating nucleic acid

Twisted intercalating nucleic acid (TINA) is a nucleic acid molecule that, when added to triplex-forming oligonucleotides (TFOs), stabilizes Hoogsteen triplex DNA formation from double-stranded DNA (dsDNA) and TFOs. Its ability to twist around a triple bond increases ease of intercalation within double stranded DNA in order to form triplex DNA. Certain configurations have been shown to stabilize Watson-Crick antiparallel duplex DNA. TINA-DNA primers have been shown to increase the specificity of binding in PCR. The use of TINA insertions in G-quadruplexes has also been shown to enhance anti-HIV-1 activity.

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