Article (Scientific journals)
Hybridization of short complementary PNAs to G-quadruplex forming oligonucleotides: An electrospray mass spectrometry study.
Amato, Jussara; Oliviero, Giorgia; De Pauw, Edwin et al.
2009In Biopolymers, 91 (4), p. 244-255
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Keywords :
mass spectrometry; DNA; PNA; noncovalent; supramolecular chemistry; G-quadruplex
Abstract :
[en] We investigated the interaction of the short PNA strand [acccca]-PNA with oligodeoxynucleotides containing one, two, or four tracts of TGGGGT units. Electrospray ionization mass spectrometry allowed exploring the wide variety of complex stoichiometries that were found to coexist in solution. In water, the PNA strand forms short heteroduplexes with the complementary DNA sequences, but higher-order structures are also found, with PNA(2n)*DNA(n) triplex units, culminating in precipitation at very low ionic strength. In the presence of ammonium acetate, there is a competition between PNA*DNA heteroduplex formation and DNA G-quadruplex formation. Heteroduplex formation is favored when the PNA + DNA mixture in ammonium acetate is heated and cooled at room temperature, but not if the PNA is added at room temperature to the pre-formed G-quadruplex. We also found that the short [acccca]-PNA strand binds to G-quadruplexes. (c) 2008 Wiley Periodicals, Inc. Biopolymers, 2008.
Research center :
Giga-Systems Biology and Chemical Biology - ULiège
Disciplines :
Chemistry
Biochemistry, biophysics & molecular biology
Author, co-author :
Amato, Jussara;  Università di Napoli Federico II, Italy > Facoltà di Scienze Biotecnologiche > Dipartimento di Chimica delle Sostanze Naturali
Oliviero, Giorgia;  Università di Napoli Federico II, Italy > Facoltà di Scienze Biotecnologiche > Dipartimento di Chimica delle Sostanze Naturali
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie physique, spectrométrie de masse
Gabelica, Valérie ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie physique, spectrométrie de masse
Language :
English
Title :
Hybridization of short complementary PNAs to G-quadruplex forming oligonucleotides: An electrospray mass spectrometry study.
Publication date :
2009
Journal title :
Biopolymers
ISSN :
0006-3525
eISSN :
1097-0282
Publisher :
Wiley Interscience, New York, United States - New York
Volume :
91
Issue :
4
Pages :
244-255
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Commentary :
This is the pre-peer reviewed version of the following article: Amato J, Oliviero G, De Pauw E, Gabelica V., Hybridization of short complementary PNAs to G-quadruplex forming oligonucleotides: An electrospray mass spectrometry study. Biopolymers. Published ahead of print on Dec. 8, 2008.
Available on ORBi :
since 16 December 2008

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