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Effect of hydrostatic pressure on nucleic acids
1Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Toronto, 19 Russell Street, Toronto, Ontario M5S 2S2, Canada. macgreg@phm.utoronto.ca
Biopolymers
|March 4, 2000
Summary
Hydrostatic pressure generally stabilizes DNA and RNA double helices, though the effect is minor compared to other biomolecules. This stabilization is linked to hydration and minimal ionization changes.
Area of Science:
- Biochemistry
- Molecular Biology
- Biophysics
Background:
- Limited research exists on hydrostatic pressure's impact on DNA/RNA stability compared to other biomolecules.
- Growing interest in biological molecule hydration drives studies on pressure effects on nucleic acids.
Purpose of the Study:
- To review existing studies on the effect of hydrostatic pressure on DNA and RNA oligomers and polymers.
- To highlight research focusing on pressure-induced changes in nucleic acid double helix stability.
Main Methods:
- Review of literature on pressure effects on nucleic acid structure.
- Analysis of experimental data, including Fourier-transform infrared spectroscopy.
Main Results:
- Pressure generally stabilizes the helical form of DNA and RNA.
- The stabilizing effect of pressure on nucleic acid helices is modest.
- Pressure does not induce significant large-scale structural changes in DNA polymers.
Conclusions:
- Hydrostatic pressure plays a role in stabilizing DNA and RNA helical structures.
- The minor effect is partly due to the absence of ionization state changes with helical transitions.
- Further research is exploring pressure effects on helix formation kinetics, equilibria, and topology.