Abstract
Evolution has refined nucleic acids to display well-defined three-dimensional structures that are functional under aqueous physiological conditions. While the structure of nucleic acids is well known in solution, it is unclear how nucleic acids react when transferred to a fully anhydrous environment. Simple physical chemistry considerations suggest that a heavily charged poly-anion would adopt fully extended conformations in vacuum, and that multistranded structure would dissociate, to guarantee that charged residues separate as much as possible to reduce Coulomb repulsion. However, and quite counterintuitively, a vast amount of experiments demonstrate that this is not the case and that oligomeric nucleic acids adopt quite compact structures in the gas phase, which in some cases might preserve memories of the original conformation in solution. In this chapter, we review our current understanding of nucleic acid structure in the gas phase.
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Abbreviations
- ESI-MS:
-
Electrospray soft ionization mass spectrometry
- IMS:
-
Ion mobility spectrometry
- IVNT:
-
In vacuum native structure
- XFEL:
-
X-ray free electron laser
- CCS:
-
Collision cross section
- MD:
-
Molecular dynamics
- QM:
-
Quantum mechanics
- DFT:
-
Density functional theory
- CCSD(T)/CBS:
-
Coupled cluster with single, double, and triple excitation/complete basis set
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Arcella, A., Portella, G., Orozco, M. (2014). Structure of Nucleic Acids in the Gas Phase. In: Gabelica, V. (eds) Nucleic Acids in the Gas Phase. Physical Chemistry in Action. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-54842-0_3
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