Close encounters with DNA.

Area of Science:

• Computational biology
• Biophysics
• Molecular modeling

Background:

• All-atom molecular dynamics (MD) simulations have advanced significantly in scale and predictive power over the last decade.
• Computational DNA research has seen a dramatic increase in system size, simulation duration, and realism.

Purpose of the Study:

• To review hallmark physical properties of DNA through the lens of all-atom simulations.
• To demonstrate how simulations reveal microscopic physical origins of experimentally observed DNA phenomena.
• To discuss current limitations of atomic force fields and sampling in DNA simulations.

Main Methods:

• All-atom molecular dynamics simulations.
• Analysis of simulation data to determine physical properties.
• Focus on four key DNA properties: effective electric charge, mechanical response, inter-DNA interactions, and behavior in electric fields.

Main Results:

• All-atom simulations can quantitatively predict DNA behavior and reveal microscopic origins of phenomena.
• Simulations provide insights into DNA's effective electric charge, mechanical response, inter-molecular interactions, and response to electric fields.
• The review highlights the successes and challenges in simulating DNA with atomic resolution.

Conclusions:

• All-atom simulations are powerful tools for understanding DNA's physical properties at a microscopic level.
• Despite limitations in force fields and sampling, simulations continue to advance computational DNA research.
• Further refinement of simulation methods will enhance the predictive capabilities for complex biological systems.