Riml, Christian, Micura, Ronald, Christian Riml, Ronald Micura
Editors
Alexandra Lusser
Abstract
5-Hydroxymethylcytosine is an epigenetic base modification that is part of the demethylation pathway of 5-methylcytosine in DNA. 5-Methylcytosine is iteratively oxidized to 5-hydroxymethylcytosine, 5-formylcytosine, and 5-carboxycytosine by enzymes of the TET protein family. Since the discovery of 5-hydroxymethylcytosine also in RNA its role in regulatory processes and metabolism remains elusive. To gain more insight into the function of RNA containing 5-hydroxymethylcytidine, innovative and interdisciplinary approaches are required. In this context, synthetic oligoribonucleotides containing 5-hyroxymethylcytidine are an inevitable tool. Therefore, in this chapter, we present the efficient synthesis of RNA oligonucleotides containing 5-hydroxymethylcytosine by solid-phase synthesis. The incorporation of the modified cytosine derivative into RNA is compatible with standard phosphoramidite-based synthesis procedures of oligoribonucleotides.
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