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The Toolbox for Modified Aptamers

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Abstract

Aptamers are nucleic acid-based scaffolds that can bind with high affinity to a variety of biological targets. Aptamers are identified from large DNA or RNA libraries through a process of directed molecular evolution (SELEX). Chemical modification of nucleic acids considerably increases the functional and structural diversity of aptamer libraries and substantially increases the affinity of the aptamers. Additionally, modified aptamers exhibit much greater resistance to biodegradation. The evolutionary selection of modified aptamers is conditioned by the possibility of the enzymatic synthesis and replication of non-natural nucleic acids. Wild-type or mutant polymerases and their non-natural nucleotide substrates that can support SELEX are highlighted in the present review. A focus is made on the efforts to find the most suitable type of nucleotide modifications and the engineering of new polymerases. Post-SELEX modification as a complementary method will be briefly considered as well.

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Acknowledgments

This publication was supported by Grant 14.604.21.0111 funded by Ministry of Education and Science of the Russian Federation.

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  1. Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia

    Sergey A. Lapa, Alexander V. Chudinov & Edward N. Timofeev

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  1. Sergey A. Lapa
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  2. Alexander V. Chudinov
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  3. Edward N. Timofeev
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Correspondence to Sergey A. Lapa.

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Lapa, S.A., Chudinov, A.V. & Timofeev, E.N. The Toolbox for Modified Aptamers. Mol Biotechnol 58, 79–92 (2016). https://doi.org/10.1007/s12033-015-9907-9

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