Structural basis of bis-quinolinium ligands binding to quadruplex–duplex hybrids from PIM1 oncogene

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F25%3A73635236" target="_blank" >RIV/61989592:15310/25:73635236 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15640/25:73635236

Výsledek na webu

<a href="https://academic.oup.com/nar/article/53/17/gkaf894/8251892" target="_blank" >https://academic.oup.com/nar/article/53/17/gkaf894/8251892</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/nar/gkaf894" target="_blank" >10.1093/nar/gkaf894</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural basis of bis-quinolinium ligands binding to quadruplex–duplex hybrids from PIM1 oncogene

Popis výsledku v původním jazyce

Our study investigates the interaction of two bis-quinolinium ligands, Phen-DC3 and 360A, with the quadruplex–duplex hybrid (QDH) derived from the promoter region of the PIM1 oncogene. While the QDH is polymorphic in vitro, with a hybrid and antiparallel conformation, we demonstrate that it predominantly adopts the antiparallel conformation within the intracellular environment of Xenopus laevis oocytes (eukaryotic model system). Notably, both ligands selectively bind to the hybrid QDH conformation in vitro and in a cellular context. High-resolution nuclear magnetic resonance (NMR) structures of the complexes between the hybrid QDH and the ligands reveal distinct binding modes at the quadruplex–duplex (Q-D) junction. Specifically, Phen-DC3 binds rigidly, while 360A dynamically reorients between two positions. Our findings provide a crucial paradigm highlighting the differences in structural equilibria involving QDH in vitro compared to its behavior in the intracellular space. They also underscore the potential to modulate these equilibria under native-like conditions through ligand interactions. The observed differences in the binding of Phen-DC3 and 360A lay the groundwork for designing next-generation bis-quinolinium compounds with enhanced selectivity for the Q-D junction. Methodologically, our study illustrates the potential of &lt;sup&gt;19&lt;/sup&gt;F-detected in-cell NMR methodology for screening interactions between DNA targets and drug-like molecules under physiological conditions.

Název v anglickém jazyce

Structural basis of bis-quinolinium ligands binding to quadruplex–duplex hybrids from PIM1 oncogene

Popis výsledku anglicky

Our study investigates the interaction of two bis-quinolinium ligands, Phen-DC3 and 360A, with the quadruplex–duplex hybrid (QDH) derived from the promoter region of the PIM1 oncogene. While the QDH is polymorphic in vitro, with a hybrid and antiparallel conformation, we demonstrate that it predominantly adopts the antiparallel conformation within the intracellular environment of Xenopus laevis oocytes (eukaryotic model system). Notably, both ligands selectively bind to the hybrid QDH conformation in vitro and in a cellular context. High-resolution nuclear magnetic resonance (NMR) structures of the complexes between the hybrid QDH and the ligands reveal distinct binding modes at the quadruplex–duplex (Q-D) junction. Specifically, Phen-DC3 binds rigidly, while 360A dynamically reorients between two positions. Our findings provide a crucial paradigm highlighting the differences in structural equilibria involving QDH in vitro compared to its behavior in the intracellular space. They also underscore the potential to modulate these equilibria under native-like conditions through ligand interactions. The observed differences in the binding of Phen-DC3 and 360A lay the groundwork for designing next-generation bis-quinolinium compounds with enhanced selectivity for the Q-D junction. Methodologically, our study illustrates the potential of &lt;sup&gt;19&lt;/sup&gt;F-detected in-cell NMR methodology for screening interactions between DNA targets and drug-like molecules under physiological conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

NUCLEIC ACIDS RESEARCH

ISSN

—

e-ISSN

1362-4962

Svazek periodika

53

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

"gkaf894-1"-"gkaf894-17"

Kód UT WoS článku

001573711300001

EID výsledku v databázi Scopus

2-s2.0-105016474974