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Viscous DNA and RNA: Quantum damped dynamical random systems.
Hamze Mousavi1, Samira Jalilvand1
1Department of Physics, Razi University, Kermanshah, Iran.
Bio Systems
|September 10, 2025
Summary
Investigating the vibrational dynamics of DNA and RNA, this study reveals that increased damping causes vibrational modes to blur. This finding impacts understanding of biomolecule dynamics in varying environments.
Area of Science:
- Physics
- Biophysics
- Molecular Biology
Background:
- DNA and RNA are dynamic biological structures with complex vibrational behaviors.
- Understanding these vibrations requires considering environmental factors like viscosity.
Purpose of the Study:
- To analyze the vibrational responses of DNA and RNA strands in viscous environments.
- To investigate the impact of damping on molecular vibrational modes.
Main Methods:
- Utilized a harmonic Hamiltonian with damping and the Green's function method.
- Modeled DNA using a fishbone model and RNA using a half-ladder model.
- Examined models in infinite, finite, and cyclic configurations with random spring stiffness and damping coefficients.
Main Results:
- Increased damping led to a gradual decline in density of states fluctuations.
- Sharp peaks in density of states broadened with higher damping coefficients.
- Vibrational modes became less distinct as system damping increased.
Conclusions:
- Damping significantly influences the vibrational characteristics of DNA and RNA.
- Findings align with wave mechanics principles, offering insights into biomolecule dynamics.
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