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Structure of Nucleic Acids in the Gas Phase

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Book cover Nucleic Acids in the Gas Phase

Part of the book series: Physical Chemistry in Action ((PCIA))

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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Correspondence to Modesto Orozco .

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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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