Probing of nucleic acid compaction using low-frequency Raman spectroscopy

Area of Science:

• Molecular Biology
• Biophysics
• Spectroscopy

Background:

• Nucleic acid compaction (DNA and RNA) is crucial for cellular functions like transcription, replication, DNA repair, and translation.
• Experimentally assessing nucleic acid compaction is challenging.

Purpose of the Study:

• To develop and validate a novel approach for probing nucleic acid compaction using low-frequency Raman spectroscopy.
• To establish a quantifiable correlation between low-frequency Raman intensity and the compaction state of nucleic acids.

Main Methods:

• Theoretical analysis
• Computational modeling
• Experimental low-frequency Raman spectroscopy
• Assessment of DNA compaction in plant cell nuclei

Main Results:

• A quantifiable correlation was established between low-frequency Raman intensity, thermal fluctuations, and nucleic acid compaction.
• Low-frequency Raman intensity varied significantly (by an order of magnitude) for different DNA samples and over time.
• The method demonstrated feasibility in assessing DNA compaction within plant cell nuclei.

Conclusions:

• Low-frequency Raman spectroscopy offers a viable method for studying nucleic acid compaction and dynamics.
• This approach has the potential to advance molecular biology and medicine by elucidating nucleic acid behavior in cellular processes.