Abstract
Oligonucleotides containing 2'-pyrene modified uridine (Upy) exhibit the increase of the pyrene monomer emission when hybridize with the complementary RNA. In order to examine the effect of restricted C3'-endoconformation of the Upy residue for the enhancement of the pyrene monomer emission, an oligodeoxyribonucleotide containing amide-linked dinucleoside with a pyrene group at the sugar residue (UapyODN) was synthesized by use of 3'-carboxymethyl-5'-O-dimethoxytrityl-2'-O-(1-pyrenylmethyl)-3'-deoxyuridine. NMR analysis indicated that the furanose ring of the uridine derivative was fixed to C3'-endo conformation. The UapyODN showed increase of fluorescence intensity to 7-fold at 375 nm when hybridized with complementary oligoribonucleotide. This result suggests that the UapyODN can detect the target RNA.
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