Article (Scientific journals)
Electrospray Mass Spectrometry of Telomeric RNA (TERRA) Reveals the Formation of Stable Multimeric G-Quadruplex Structures
Collie, Gavin W.; Parkinson, Gary N.; Neidle, Stephen et al.
2010In Journal of the American Chemical Society, 132 (27), p. 9328–9334
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Keywords :
mass spectrometry; noncovalent; G-quadruplex; DNA; RNA; spectroscopy
Abstract :
[en] We report on the self-assembled structures formed by 12-mer, 22-mer, and 45-mer telomeric RNA (telRNA/TERRA) sequences compared to their DNA analogues, as studied by electrospray mass spectrometry, circular dichroism, and thermal denaturation. The major difference between telomeric RNA and DNA sequences is the ability of telomeric RNA to form higher-order dimeric assemblies, initiated by cation-mediated stacking of two parallel G-quadruplex subunits. The 5′-5′ stacking had been observed recently by NMR for the r(GGGUUAGGGU) 10-mer (Martadinata, H.; Phan, A. T. J. Am. Chem. Soc. 2009, 131, 2570); the present work shows that stacking also occurs for the 22-mer containing four G-tracts and for the 45-mer containing eight G-tracts, suggesting a general structural feature of telomeric RNA. The importance of kinetic effects in multimer formation, unfolding, and structural rearrangements is also highlighted.
Research center :
Giga-Systems Biology and Chemical Biology - ULiège
Disciplines :
Biochemistry, biophysics & molecular biology
Chemistry
Author, co-author :
Collie, Gavin W.;  CRUK Biomolecular Structure Group, The School of Pharmacy, UniVersity of London, WC1N 1AX London, United Kingdom
Parkinson, Gary N.;  CRUK Biomolecular Structure Group, The School of Pharmacy, UniVersity of London, WC1N 1AX London, United Kingdom
Neidle, Stephen;  CRUK Biomolecular Structure Group, The School of Pharmacy, UniVersity of London, WC1N 1AX London, United Kingdom
Rosu, Frédéric ;  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.)
Gabelica, Valérie ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Language :
English
Title :
Electrospray Mass Spectrometry of Telomeric RNA (TERRA) Reveals the Formation of Stable Multimeric G-Quadruplex Structures
Publication date :
2010
Journal title :
Journal of the American Chemical Society
ISSN :
0002-7863
eISSN :
1520-5126
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
132
Issue :
27
Pages :
9328–9334
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
EU COST action MP0802
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