Journal
CHEMBIOCHEM
Volume 17, Issue 16, Pages 1532-1540Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.201600245
Keywords
5mC; DNA methylation; DNA polymerases; epigenetics; gene expression; modified nucleotides
Funding
- European Research Council (ERC) [339834]
- Konstanz Research School Chemical Biology
- European Research Council (ERC) [339834] Funding Source: European Research Council (ERC)
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Gene expression is extensively regulated by the occurrence and distribution of the epigenetic marker 2-deoxy 5-methylcytosine (5mC) in genomic DNA. Because of its effects on tumorigenesis there is an important link to human health. In addition, detection of 5mC can serve as an outstanding biomarker for diagnostics as well as for disease therapy. Our previous studies have already shown that, by processing O-6-alkylated 2-deoxyguanosine triphosphate (dGTP) analogues, DNA polymerases are able to sense the presence of a single 5mC unit in a template. Here we present the synthesis and evaluation of an extended toolbox of 6-substituted 2-aminopurine-2-deoxyribonucleoside 5-triphosphates modified at position6 with various functionalities. We found that sensing of 5-methylation by this class of nucleotides is more general, not being restricted to O-6-alkyl modification of dGTP but also applying to other functionalities.
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