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An Efficient Method for the Construction of Functionalized DNA Bearing Amino Acid Groups through Cross-Coupling Reactions of Nucleoside Triphosphates Followed by Primer Extension or PCR

Authors

  • Petr Čapek Dr.,

    1. Gilead Sciences & IOCB Research Center, Institute of Organic Chemistry and Biochemistry, v. v. i. Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 16610 Prague 6, Czech Republic, Fax: (+420) 220-183-559
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  • Hana Cahová,

    1. Gilead Sciences & IOCB Research Center, Institute of Organic Chemistry and Biochemistry, v. v. i. Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 16610 Prague 6, Czech Republic, Fax: (+420) 220-183-559
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  • Radek Pohl Dr.,

    1. Gilead Sciences & IOCB Research Center, Institute of Organic Chemistry and Biochemistry, v. v. i. Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 16610 Prague 6, Czech Republic, Fax: (+420) 220-183-559
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  • Michal Hocek Prof. Dr.,

    1. Gilead Sciences & IOCB Research Center, Institute of Organic Chemistry and Biochemistry, v. v. i. Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 16610 Prague 6, Czech Republic, Fax: (+420) 220-183-559
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  • Christian Gloeckner,

    1. Department of Chemistry, University of Konstanz, 78457 Konstanz, Germany, Fax: (+49) 7531-885140
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  • Andreas Marx Prof. Dr.

    1. Department of Chemistry, University of Konstanz, 78457 Konstanz, Germany, Fax: (+49) 7531-885140
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Abstract

Single-step aqueous cross-coupling reactions of nucleobase-halogenated 2′-deoxynucleosides (8-bromo-2′-deoxyadenosine, 7-iodo-7-deaza-2′-deoxyadenosine, or 5-iodo-2′-deoxy-uridine) or their 5′-triphosphates with 4-boronophenylalanine or 4-ethynylphenylalanine have been developed and used for efficient synthesis of modified 2′-deoxynucleoside triphosphates (dNTPs) bearing amino acid groups. These dNTPs were then tested as substrates for DNA polymerases for construction of functionalized DNA through primer extension and PCR. While 8-substituted adenosine triphosphates were poor substrates for DNA polymerases, the corresponding 7-substituted 7-deazaadenine and 5-substituted uracil nucleotides were efficiently incorporated in place of dATP or dTTP, respectively, by Pwo (Pyrococcus woesei) DNA polymerase. Nucleotides bearing the amino acid connected through the less bulky acetylene linker were incorporated more efficiently than those directly linked through a more bulky phenylene group. In addition, combinations of modified dATPs and dTTPs were incorporated by Pwo polymerase. Novel functionalized DNA duplexes bearing amino acid moieties were prepared by this two-step approach. PCR can be used for amplification of duplexes bearing large number of modifications, while primer extension is suitable for introduction of just one or several modifications in a single DNA strand.

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