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Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

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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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Updated: Aug 25, 2025

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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TripDesign: A DNA Triplex Design Approach Based on Interaction Forces.

Lijun Sun1, Ben Cao2, Yuan Liu2

  • 1The Key Laboratory of Advanced Design and Intelligent Computing, Ministry of Education, School of Software Engineering, Dalian University, Dalian116622, China.

The Journal of Physical Chemistry. B
|October 19, 2022
PubMed
Summary
This summary is machine-generated.

We developed TripDesign, a novel DNA triplex design method using interaction forces. This approach enhances DNA nanostructure stability and reversibility, enabling efficient and automatic sequence design for nanotechnology applications.

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Area of Science:

  • Biochemistry
  • Nanotechnology
  • Computational Biology

Background:

  • DNA triplexes offer enhanced nanostructure stability and pH responsiveness over single- and double-stranded DNA.
  • Current limitations include sequence stability issues and inefficient design processes for DNA triplexes.

Purpose of the Study:

  • To propose an efficient and automatic DNA triplex design approach (TripDesign) based on interaction forces.
  • To address limitations in sequence stability and design efficiency for DNA triplex applications.

Main Methods:

  • Introduced stacking force, torsional stress, and G-quadruplex motif constraints.
  • Employed an improved memetic algorithm for combinatorial constraint-based triplex sequence design.
  • Investigated triplex formation kinetics, including minimum triplex-forming oligo (TFO) length and cyclic pH-jump depletion factors.

Main Results:

  • Sequences designed with TripDesign demonstrated high stability and reversibility.
  • The TripDesign approach achieved efficient and automatic DNA triplex sequence generation.
  • Characterized key parameters influencing DNA triplex formation.

Conclusions:

  • TripDesign offers a robust method for designing stable and reversible DNA triplexes.
  • The study advances the understanding of DNA triplex formation dynamics.
  • This work promotes the broader application of DNA triplexes in nanotechnology.