Nucleic Acid Charge Transfer: Black, White and Gray.

Area of Science:

• Biophysics
• Molecular Biology
• Computational Chemistry

Background:

• Charge transport is crucial for biological processes.
• Deoxyribonucleic acid (DNA) and peptide nucleic acid (PNA) are key molecules for charge transport studies.
• Understanding charge transfer mechanisms is essential for developing novel electronic devices.

Purpose of the Study:

• To review the factors influencing charge transport in DNA and PNA.
• To describe an emerging framework for understanding charge transport mechanisms in nucleic acids.
• To highlight the role of structure and dynamics in modulating charge transfer rates.

Main Methods:

• Review of theoretical studies on charge transport in DNA and PNA.
• Analysis of nucleobase geometry, electronic structure, and solvent effects.
• Examination of thermal conformational fluctuations and their impact on charge transfer.

Main Results:

• Structure and dynamics significantly modulate charge transfer rates in DNA and PNA.
• Different structural conformations support distinct charge transport mechanisms.
• Nucleobase geometry, electronic structure, solvent, and dynamics collectively influence charge transfer.

Conclusions:

• A comprehensive framework is emerging to understand the diversity of charge transport mechanisms in nucleic acids.
• The interplay between structure, dynamics, and electronic properties governs charge transport.
• This understanding has implications for both biological function and biomaterial design.