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Related Experiment Video

Updated: Jul 19, 2026

Structure-Based Simulation and Sampling of Transcription Factor Protein Movements along DNA from Atomic-Scale Stepping to Coarse-Grained Diffusion

Structure-Based Simulation and Sampling of Transcription Factor Protein Movements along DNA from Atomic-Scale Stepping to Coarse-Grained Diffusion

Published on: March 1, 2022

Dynamical conductance of model DNA sequences.

Wei Ren¹, Jian Wang, Zhongshui Ma

¹Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China.

The Journal of Chemical Physics

|November 10, 2006

Summary

Charge transport in DNA was studied using a tight binding model. Results show DNA emittance is predictable with an analytical formula, and its dynamic response changes with temperature.

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Studying DNA Looping by Single-Molecule FRET

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Last Updated: Jul 19, 2026

Structure-Based Simulation and Sampling of Transcription Factor Protein Movements along DNA from Atomic-Scale Stepping to Coarse-Grained Diffusion

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Published on: March 1, 2022

Studying DNA Looping by Single-Molecule FRET

Studying DNA Looping by Single-Molecule FRET

Published on: June 28, 2014

Area of Science:

Condensed Matter Physics
Biophysics
Computational Nanoscience

Background:

Understanding charge transport in DNA is crucial for molecular electronics and biosensing applications.
Previous studies have explored DNA conductivity using various theoretical models.

Purpose of the Study:

To investigate charge transport phenomena in model DNA sequences subjected to an external AC bias.
To develop and validate an analytical formula for describing DNA emittance.
To analyze the temperature-dependent dynamic response of DNA charge transport.

Main Methods:

Utilized a tight binding model to simulate charge transport.
Performed numerical calculations of emittance for various DNA sequences.
Employed scattering matrix theory for analytical insights.

Main Results:

Numerical emittance results for model DNA sequences are accurately described by an analytical formula, particularly for inductive-like dynamic responses.
The derived formula aligns with general principles of scattering matrix theory.
Temperature variations were shown to alter the dynamic response, transitioning between inductive-like and capacitive-like behaviors.

Conclusions:

The study provides a robust analytical framework for predicting charge transport in DNA.
The findings highlight the significant influence of temperature on DNA's electronic properties.
This research contributes to the fundamental understanding of charge migration in biological molecules.