Volume 135, Issue 7 e202215245
Forschungsartikel

Expanding the Toolbox of Target Directed Bio-Orthogonal Synthesis: In Situ Direct Macrocyclization by DNA Templates

Ritapa Chaudhuri

Ritapa Chaudhuri

School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S.C. Mullick Road, Jadavpur, Kolkata, 700099 India

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Thumpati Prasanth

Thumpati Prasanth

School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S.C. Mullick Road, Jadavpur, Kolkata, 700099 India

Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Kolkata, Chunilal Bhawan,168, Maniktala Main Road, P.O. Bengal Chemicals, P.S. Phoolbagan, Kolkata, 700054 India

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Dr. Jyotirmayee Dash

Corresponding Author

Dr. Jyotirmayee Dash

School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S.C. Mullick Road, Jadavpur, Kolkata, 700099 India

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Dedicated to Professor Ayyappanpillai Ajayagosh on his 60th birthday
First published: 27 November 2022

Abstract

Herein, we demonstrate for the first time that noncanonical DNA can direct macrocyclization-like challenging reactions to synthesize gene modulators. The planar G-quartets present in DNA G-quadruplexes (G4s) provide a size complementary reaction platform for the bio-orthogonal macrocyclization of bifunctional azide and alkyne fragments over oligo- and polymerization. G4s immobilized on gold-coated magnetic nanoparticles have been used as target templates to enable easy identification of a selective peptidomimetic macrocycle. Structurally similar macrocycles have been synthesized to understand their functional role in the modulation of gene function. The innate fluorescence of the in situ formed macrocycle has been utilized to monitor its cellular localization using a G4 antibody and its in cell formation from the corresponding azide and alkyne fragments. The successful execution of in situ macrocyclization in vitro and in cells would open up a new dimension for target-directed therapeutic applications.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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