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Application of a NMDA Receptor Conductance in Rat Midbrain Dopaminergic Neurons Using the Dynamic Clamp Technique
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DNA conductance modulation via aptamer binding.

Hashem Mohammad1, Lina Alsaleh1, Abrar Alotaibi2

  • 1Department of Electrical Engineering, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait. hashem.mohammad@ku.edu.kw.

Nanoscale
|March 4, 2025
PubMed
Summary
This summary is machine-generated.

Aptamers binding to DNA significantly enhance its electrical conductance by altering base pair structures. This finding advances DNA-aptamer complexes for molecular electronics and biosensing.

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Area of Science:

  • Molecular Biophysics
  • Nanotechnology
  • Computational Chemistry

Background:

  • DNA's electronic properties are promising for biosensing and molecular electronics.
  • Controlling DNA's electrical conductance via molecule binding, like aptamers, is a key challenge.

Purpose of the Study:

  • To investigate how aptamer binding influences DNA structure and electrical conductance.
  • To understand the mechanisms behind aptamer-induced changes in DNA conductivity.

Main Methods:

  • Combined molecular dynamics simulations and density functional theory.
  • Utilized Green's function-based charge transport calculations.
  • Analyzed structural realignment of DNA base pairs at the aptamer binding site.

Main Results:

  • Aptamer binding induces structural realignment of DNA base pairs.
  • This realignment enhances electronic coupling, forming a conductive pathway.
  • DNA conductance increased by at least an order of magnitude compared to unmodified DNA.

Conclusions:

  • Aptamer-DNA interactions create a significant, tunable conductive path.
  • Findings support the development of DNA-aptamer complexes for advanced molecular electronics.
  • This work paves the way for novel DNA-based biosensors.