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- Title
Target‐Directed Azide‐Alkyne Cycloaddition for Assembling HIV‐1 TAR RNA Binding Ligands.
- Authors
Paul, Rakesh; Dutta, Debasish; Paul, Raj; Dash, Jyotirmayee
- Abstract
The highly conserved HIV‐1 transactivation response element (TAR) binds to the trans‐activator protein Tat and facilitates viral replication in its latent state. The inhibition of Tat–TAR interactions by selectively targeting TAR RNA has been used as a strategy to develop potent antiviral agents. Therefore, HIV‐1 TAR RNA represents a paradigmatic system for therapeutic intervention. Herein, we have employed biotin‐tagged TAR RNA to assemble its own ligands from a pool of reactive azide and alkyne building blocks. To identify the binding sites and selectivity of the ligands, the in situ cycloaddition has been further performed using control nucleotide (TAR DNA and TAR RNA without bulge) templates. The hit triazole‐linked thiazole peptidomimetic products have been isolated from the biotin‐tagged target templates using streptavidin beads. The major triazole lead generated by the TAR RNA presumably binds in the bulge region, shows specificity for TAR RNA over TAR DNA, and inhibits Tat–TAR interactions.
- Subjects
STREPTAVIDIN; RNA; TAR; TAT protein; RING formation (Chemistry); LIGANDS (Chemistry); ISOXAZOLIDINES
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 30, p12507
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202003461