Probing Ambiguous Base‐Pairs by Genetic Transformation with XNA Templates |
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| Authors: | Dr Valérie Pezo Guy Schepers Dr Catia Lambertucci Dr Philippe Marlière Prof Piet Herdewijn |
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| Affiliation: | 1. CEA, DSV, IG, Genoscope, 2 rue Gaston Crémieux 91057 Evry Cedex (France);2. ISSB, Génopole genavenir6, Equipe Xénome, 5 rue Henri Desbruères 91030 Evry Cedex (France);3. Medicinal Chemistry, Rega Institute for Medical Research, KU Leuven, Minderbroedersstraat 10, 3000 Leuven (Belgium) |
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| Abstract: | The templating potential of anhydrohexitol oligonucleotides bearing ambiguous bases was studied in vivo, by using a selection screen for mosaic heteroduplex plasmids in Escherichia coli. 1,5‐Anhydro‐2,3‐dideoxy‐2‐(5‐nitroindazol‐1‐yl)‐D ‐arabino‐hexitol showed the greatest ambiguity among the three nucleosides tested. At most two successive ambiguous bases could be tolerated on hexitol templates read in bacterial cells. Hexitol nucleosides bearing simplified heterocycles thus stand as promising monomers for generating random DNA sequences in vivo from defined synthetic oligonucleotides. |
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| Keywords: | HNA mutagenesis polymerization universal bases unnatural bases XNA |
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