4.5 Article

Unveiling the structural mechanism of a G-quadruplex pH-Driven switch

Journal

BIOCHIMIE
Volume 214, Issue -, Pages 73-82

Publisher

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.biochi.2023.08.002

Keywords

Base-triple; pH-driven switch; DNA; G-quadruplex; NMR

Ask authors/readers for more resources

This study revealed two distinct structures of the human telomere oligonucleotide TAGGG, which can serve as a potential system for pH-driven switches and nanotechnology applications.
The human telomere oligonucleotide, d[TAGGG(TTAGGG)2TTAGG] (TAGGG), can adopt two distinct 2-G-quartet G-quadruplex structures at pH 7.0 and 5.0, referred to as the TD and KDH thorn forms, respectively. By using a combination of NMR and computational techniques, we determined high-resolution structures of both forms, which revealed unique loop architectures, base triples, and base pairs that play a crucial role in the pH-driven structural transformation of TAGGG. Our study demonstrated that TAGGG represents a reversible pH-driven switch system where the stability and pH-induced structural transformation of the G-quadruplexes are influenced by the terminal residues and base triples. Gaining insight into the factors that regulate the formation of G-quadruplexes and their pH-sensitive structural equilibrium holds great potential for the rational design of novel DNA based pH-driven switches. These advancements in understanding create exciting opportunities for applications in the field of nanotechnology, specifically in the development of bio-nano-motors.(c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.5
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available