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Related Concept Videos

Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
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Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
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DNA Base Pairing02:27

DNA Base Pairing

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,

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Updated: May 15, 2026

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
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Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes

Published on: April 4, 2025

G-quadruplexes form ultrastable parallel structures in deep eutectic solvent.

Chuanqi Zhao1, Jinsong Ren, Xiaogang Qu

  • 1Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.

Langmuir : the ACS Journal of Surfaces and Colloids
|January 4, 2013
PubMed
Summary
This summary is machine-generated.

G-quadruplex DNA forms stable structures in anhydrous deep eutectic solvents (DESs), preferring parallel conformations. This stability extends to high temperatures, enabling new applications in water-free environments.

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Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers
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Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers
08:28

Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers

Published on: September 19, 2017

Area of Science:

  • Biochemistry
  • Materials Science

Background:

  • G-quadruplex DNA exhibits diverse, controllable structures crucial for biological processes.
  • Current applications of G-quadruplex DNA are limited to aqueous media.
  • Anhydrous conditions are often required for chemical reactions and devices, posing a challenge for G-quadruplex DNA utilization.

Purpose of the Study:

  • To investigate the structural behavior and stability of G-quadruplex DNA in anhydrous deep eutectic solvents (DESs).
  • To explore the potential of DESs as a medium for G-quadruplex DNA applications under anhydrous and high-temperature conditions.

Main Methods:

  • Systematic study of 10 representative G-quadruplex DNA structures.
  • Characterization of G-quadruplex formation in anhydrous room-temperature DESs.
  • Assessment of thermal stability of G-quadruplex DNA in DESs.

Main Results:

  • G-quadruplex DNA forms intramolecular, intermolecular, and higher-order structures in DESs.
  • Parallel conformation is the preferred structure for G-quadruplex DNA in DESs.
  • G-quadruplex DNA exhibits enhanced stability in DESs, surviving temperatures above 110 °C.

Conclusions:

  • Deep eutectic solvents provide a viable medium for G-quadruplex DNA in anhydrous environments.
  • The enhanced stability and structural diversity in DESs open avenues for high-temperature and water-free G-quadruplex DNA applications.
  • This research facilitates the development of DNA-based catalysts, biosensors, and architectures for demanding conditions.