Article (Scientific journals)
d(CGGTGGT) forms an octameric parallel G-quadruplex via stacking of unusual G(:C):G(:C):G(:C):G(:C) octads
Borbone, Nicola; Amato, Jussara; Oliviero, Giorgia et al.
2011In Nucleic Acids Research
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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Funding for open access charge: Italian M.U.R.S.T. (P.R.I.N. 2007).


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Keywords :
mass spectrometry; nucleic acids; non-covalent; G-quadruplex; electrospray; FTICR
Abstract :
[en] Among non-canonical DNA secondary structures, G-quadruplexes are currently widely studied because of their probable involvement in many pivotal biological roles, and for their potential use in nanotechnology. The overall quadruplex scaffold can exhibit several morphologies through intramolecular or intermolecular organization of G-rich oligodeoxyribonucleic acid strands. In particular, several G-rich strands can form higher order assemblies by multimerization between several G-quadruplex units. Here, we report on the identification of a novel dimerization pathway. Our Nuclear magnetic resonance, circular dichroism, UV, gel electrophoresis and mass spectrometry studies on the DNA sequence dCGGTGGT demonstrate that this sequence forms an octamer when annealed in presence of K+ or NH4+ ions, through the 5′-5′ stacking of two tetramolecular G-quadruplex subunits via unusual G(:C):G(:C):G(:C):G(:C) octads.
Research center :
Giga-Systems Biology and Chemical Biology - ULiège
Disciplines :
Chemistry
Biochemistry, biophysics & molecular biology
Author, co-author :
Borbone, Nicola;  University of Naples Federico II, 80131 Naples, Italy
Amato, Jussara;  University of Naples Federico II, 80131 Naples, Italy
Oliviero, Giorgia;  University of Naples Federico II, 80131 Naples, Italy
D'Atri, Valentina;  University of Naples Federico II, 80131 Naples, Italy
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.)
Piccialli, Gennaro;  University of Naples Federico II, 80131 Naples, Italy
Mayol, Luciano;  University of Naples Federico II, 80131 Naples, Italy
Language :
English
Title :
d(CGGTGGT) forms an octameric parallel G-quadruplex via stacking of unusual G(:C):G(:C):G(:C):G(:C) octads
Publication date :
2011
Journal title :
Nucleic Acids Research
ISSN :
0305-1048
eISSN :
1362-4962
Publisher :
Oxford University Press, Oxford, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 04 July 2011

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