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On the Enzymatic Formation of Metal Base Pairs with Thiolated and p K a ‐Perturbed Nucleotides
Author(s) -
LeviAcobas Fabienne,
Röthlisberger Pascal,
Sarac Ivo,
Marlière Philippe,
Herdewijn Piet,
Hollenstein Marcel
Publication year - 2019
Publication title -
chembiochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.05
H-Index - 126
eISSN - 1439-7633
pISSN - 1439-4227
DOI - 10.1002/cbic.201900399
Subject(s) - nucleotide , chemistry , nucleoside , nucleic acid , base pair , combinatorial chemistry , base (topology) , dna , metal , stereochemistry , enzyme , biochemistry , organic chemistry , mathematical analysis , mathematics , gene
The formation of artificial metal base pairs is an alluring and versatile method for the functionalization of nucleic acids. Access to DNA functionalized with metal base pairs is granted mainly by solid‐phase synthesis. An alternative, yet underexplored method, envisions the installation of metal base pairs through the polymerization of modified nucleoside triphosphates. Herein, we have explored the possibility of using thiolated and p K a ‐perturbed nucleotides for the enzymatic construction of artificial metal base pairs. The thiolated nucleotides S2C, S6G, and S4T as well as the fluorinated analogue 5FU are readily incorporated opposite a templating S4T nucleotide through the guidance of metal cations. Multiple incorporation of the modified nucleotides along with polymerase bypass of the unnatural base pairs are also possible under certain conditions. The thiolated nucleotides S4T, S4T, S2C, and S6G were also shown to be compatible with the synthesis of modified, high molecular weight single‐stranded (ss)DNA products through TdT‐mediated tailing reactions. Thus, sulfur‐substitution and p K a perturbation represent alternative strategies for the design of modified nucleotides compatible with the enzymatic construction of metal base pairs.