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. 1989 May 11;17(9):3373–3386. doi: 10.1093/nar/17.9.3373

Highly efficient chemical synthesis of 2'-O-methyloligoribonucleotides and tetrabiotinylated derivatives; novel probes that are resistant to degradation by RNA or DNA specific nucleases.

B S Sproat 1, A I Lamond 1, B Beijer 1, P Neuner 1, U Ryder 1
PMCID: PMC317781  PMID: 2726482

Abstract

2'-O-Methyloligoribonucleotides have been synthesised on solid phase from base protected 5'-O-dimethoxytrityl-2'-O-methylribonucleoside-3'-O-(2-cyanoethyl N,N-diisopropylphosphoramidites) using 5-(4-nitrophenyl)-1H-tetrazole as activator. Coupling yields greater than 99% were achieved, as judged by trityl cation release. The preparation of a modified 2'-deoxycytidine building block bearing an N4-(5-trifluoroacetylaminopentyl) spacer is also described. The latter compound enabled the chemical synthesis of 2'-O-methyloligoribonucleotide probes carrying several 5'- terminal biotinylation sites (in general four modified residues were used), which can be conveniently 32P end-labelled enzymatically using polynucleotide kinase. Used in conjunction with streptavidin-containing derivatives, such biotinylated probes have important applications in biochemical purification and electron microscopy of RNA-protein complexes. The 2'-O-methyloligoribonucleotides are completely resistant to degradation by either RNA or DNA specific nucleases. In contrast, nucleases with dual RNA/DNA specificity show a complete spectrum of cleavage rates.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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