期刊
NUCLEIC ACIDS RESEARCH
卷 30, 期 6, 页码 1333-1337出版社
OXFORD UNIV PRESS
DOI: 10.1093/nar/30.6.1333
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Infrared and UV spectroscopies have been used to study the assembly of a hairpin nucleotide sequence (nucleotides 3-30) of the 5' non-coding region of the hepatitis C virus RNA (5'-GGCGGGGAUUAUCCCCGCUGUGAGGCGG-3') with a RNA 20mer ligand (5'-CCGCCUCACAAAGGUGGGGU-3') in the presence of magnesium ion and spermidine. The resulting complex involves two helical structural domains: the first one is an intermolecular duplex stem at the bottom of the target hairpin and the second one is a parallel triplex generated by the intramolecular hairpin duplex and the ligand. Infrared spectroscopy shows that N-type sugars are exclusively present in the complex. This is the first case of formation of a RNA parallel triplex with purine motif and shows that this type of targeting RNA strands to viral RNA duplexes can be used as an alternative to antisense oligonucleotides or ribozymes.
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