Nucleic Acids under Stress: Understanding and Simulating Nucleobase Fragmentation Pathways.

Area of Science:

• Radiation chemistry
• Computational chemistry
• Biophysics

Background:

• Radiation effects on nucleic acids are extensively studied using diverse methods.
• Fundamental physical and chemical effects, especially within biological contexts, require further investigation.
• Interpreting experimental mass spectra of nucleic acid bases and their reactivity in complex environments remains challenging.

Purpose of the Study:

• To summarize recent theoretical advancements in predicting and interpreting nucleic acid base reactivity.
• To emphasize the importance of considering realistic nano-environments in theoretical models.
• To highlight novel fragmentation pathways influenced by the biological environment.

Main Methods:

• Theoretical chemistry approaches
• Molecular dynamics simulations
• Analysis of fragmentation pathways

Main Results:

• Recent theoretical advancements offer improved prediction and interpretation of nucleic acid base reactivity.
• Modeling realistic nano-environments reveals the significant impact of the surrounding biological milieu.
• The environment can induce novel fragmentation pathways not observed in isolated nucleobases.

Conclusions:

• Theoretical studies, particularly those incorporating molecular dynamics, are essential for understanding radiation effects on nucleic acids.
• The biological environment plays a critical, non-innocent role in modulating the reactivity and fragmentation of nucleic acid bases.
• Accurate modeling of nano-environments is key to interpreting experimental data and predicting biological consequences.