Bioorganic and Medicinal Chemistry Letters p. 2593 - 2596 (2004)
Update date:2022-08-04
Topics:
Endo, Masayuki
Mitsui, Tsuneo
Okuni, Taeko
Kimoto, Michiko
Hirao, Ichiro
Yokoyama, Shigeyuki
Site-specific incorporation of a hydrophobic nucleotide analog into RNA, by T7 transcription mediated by unnatural base pairs, was developed. The nucleotide analog, 5-phenylethynyl-3-(β-D-ribofuranosyl)pyridin-2-one 5-triphosphate (denoted by Ph-yTP), was chemically synthesized and then site-specifically incorporated by T7 RNA polymerase into RNA opposite the pairing partner, 2-amino-6-(2-thienyl)purine (denoted by s) in DNA templates. The introduction of Ph-y into a theophylline-binding RNA aptamer, in which a uridine in the internal loop was replaced by Ph-y, raised the thermal stability of the aptamer. Thus, this unnatural nucleotide analog would be useful for stabilizing RNA tertiary structures and complexes between RNA and other molecules.
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