Abstract:
:Photo-chemical deamination of cytosine using 3-cyanovinylcarbazole nucleoside (CNVK) mediated photo-cross-linking is a technique for site-directed mutagenesis. Using this technique in vivo requires the elimination of a high-temperature incubation step; instead, incubation should be carried out under physiological conditions. To improve the reactivity of CNVK mediated photo-cross-link induced deamination of cytosine under physiological conditions, an evaluation of base pairing in cytosine was carried out with respect to its deamination. Guanine was replaced with 4 different counter bases (inosine, 2-aminopurine, 5-nitroindole, and nebularine), showing distinct hydrogen bonding patterns with target cytosine, which was incorporated at the -1 position with respect to CNVK in the CNVK-modified photo-responsive oligodeoxyribonucleotides to ascertain the role of hydrogen bonding in deamination under physiological conditions. Among the counter bases, inosine showed the highest acceleration towards the photo-induced deamination reaction.
journal_name
Mol Biosystjournal_title
Molecular bioSystemsauthors
Sethi S,Ooe M,Sakamoto T,Fujimoto Kdoi
10.1039/c7mb00082ksubject
Has Abstractpub_date
2017-06-01 00:00:00pages
1152-1156issue
6eissn
1742-206Xissn
1742-2051journal_volume
13pub_type
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