Article (Scientific journals)
UV Spectroscopy of DNA Duplex and Quadruplex Structures in the Gas Phase
Rosu, Frédéric; Gabelica, Valérie; De Pauw, Edwin et al.
2012In Journal of Physical Chemistry. A, 116, p. 5383−5391
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Abstract :
[en] UV absorption spectroscopy is one of the most widely used methods to monitor nucleic acid folding in solution, but the absorption readout is the weighted average contribution of all species present in solution. Mass spectrometry, on the other hand, is able to separate constituents of the solution based on their mass, but methods to probe the structure of each constituent are needed. Here, we explored whether gas-phase UV spectroscopy can give an indication of DNA folding in ions isolated by electrospray mass spectrometry. Model DNA single strands, duplexes, and G-quadruplexes were extracted from solution by electrospray; the anions were stored in a quadrupole ion trap and irradiated by a tunable laser to obtain the UV action spectra of each complex. We found that the duplex and quadruplex spectra are significantly different from the spectra of single strands, thereby suggesting that electronic spectroscopy can be used to probe the DNA gas-phase structure and obtain information about the intrinsic properties of high-order DNA structure.
Disciplines :
Chemistry
Author, co-author :
Rosu, Frédéric ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Gabelica, Valérie ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Antoine, Rodolphe
Broyer, Michel
Dugourd, Philippe
Language :
English
Title :
UV Spectroscopy of DNA Duplex and Quadruplex Structures in the Gas Phase
Publication date :
May 2012
Journal title :
Journal of Physical Chemistry. A
ISSN :
1089-5639
eISSN :
1520-5215
Publisher :
ACS Publications
Volume :
116
Pages :
5383−5391
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 June 2012

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