PMID: 9547284Jun 20, 1998Paper

Advantages of 2'-O-methyl oligoribonucleotide probes for detecting RNA targets

Nucleic Acids Research
M MajlessiM M Becker

Abstract

We have compared various kinetic and melting properties of oligoribonucleotide probes containing 2'-O-methylnucleotides or 2'-deoxynucleotides with regard to their use in assays for the detection of nucleic acid targets. 2'-O-Methyl oligoribonucleotide probes bound to RNA targets faster and with much higher melting temperatures (Tm values) than corresponding 2'-deoxy oligoribonucleotide probes at all lengths tested (8-26 bases). Tm values of both probes increased with length up to approximately 19 bases, with maximal differences in Tm between 2'-O-methyl and 2'-deoxy oligoribonucleotide probes observed at lengths of 16 bases or less. In contrast to RNA targets, 2'-O-methyl oligoribonucleotide probes bound more slowly and with the same Tm to DNA targets as corresponding 2'-deoxy oligoribonucleotide probes. Because of their greatly enhanced Tm when bound to RNA, 2'-O-methyl oligoribonucleotide probes can efficiently bind to double-stranded regions of structured RNA molecules. A 17 base 2'-O-methyl oligoribonucleotide probe was able to bind a double-stranded region of rRNA whereas the same 17 base 2'- deoxy oligoribonucleotide probe did not. Due to their enhanced Tm when bound to RNA targets, shorter 2'-O-methyl oligoribonucleotid...Continue Reading

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Citations

Jun 6, 2003·Bioorganic & Medicinal Chemistry·Atsushi MaharaAkira Murakami
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