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Updated: May 29, 2026

Single-Molecule Förster Resonance Energy Transfer Methods for Real-Time Investigation of the Holliday Junction Resolution by GEN1

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Published on: September 18, 2019

Identifying three-way DNA junction-specific small-molecules.

Sophie Vuong¹, Loïc Stefan, Pauline Lejault

¹Institut de Chimie Moléculaire de l'Université de Bourgogne, CNRS UMR5260, 9 Avenue Alain Savary, 21000 Dijon, France.

|September 3, 2011

Summary

This summary is machine-generated.

Researchers developed simple biophysical assays to find small molecules that bind specifically to three-way junction DNA (TWJ-DNA). They identified a promising TWJ-selective molecule, TACN-Q, for potential therapeutic applications.

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Area of Science:

Biochemistry
Molecular Biology
Medicinal Chemistry

Background:

Three-way junction DNA (TWJ-DNA) is an alternative DNA structure with unique geometry at its branch point.
Targeting TWJ-DNA with small molecules is possible but underexplored in solution.
Existing methods for studying small-molecule-DNA interactions often focus on other structures like quadruplex-DNA.

Purpose of the Study:

To develop and validate simple biophysical assays for identifying TWJ-DNA-specific small-molecule ligands.
To investigate the potential of targeting TWJ-DNA in solution using synthetic small molecules.
To discover novel TWJ-selective compounds for potential therapeutic or diagnostic use.

Main Methods:

Development of simple biophysical assays for TWJ-DNA ligand screening.
Calibration of assays using a known non-specific DNA binder (TMPyP4).
Validation of assays using triazacyclononane (TACN) derivatives and identification of a lead compound.

Main Results:

A set of biophysical assays was successfully established and calibrated for TWJ-DNA ligand identification.
A novel triazacyclononane-quinoline construct (TACN-Q) was identified as a fairly-affinic and highly TWJ-selective ligand.
The study demonstrates the feasibility of targeting TWJ-DNA in solution.

Conclusions:

Simple biophysical assays can effectively identify TWJ-DNA-specific small-molecule ligands.
TACN-Q represents a promising candidate for selective TWJ-DNA targeting in solution.
This work opens avenues for developing novel therapeutics or research tools based on TWJ-DNA recognition.