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Title

Resolution of parallel and antiparallel oligonucleotide triple helices formation and melting processes by multivariate curve resolution

AuthorsJaumot, Joaquim ; Aviñó, Anna ; Tauler, Romà; Gargallo, Raimundo; Eritja Casadellà, Ramón
KeywordsFactor analysis
Melting studies
Multivariate Curve Resolution
Protonation studies
Triplex forming oligonucleotides
Issue DateOct-2003
PublisherAdenine Press
CitationJournal of Biomolecular Structure and Dynamics
AbstractA procedure is described for the complete resolution of concentration profiles of oligonucleotide triplexes as a function of pH and temperature. The pH and temperature ranges at which triplexes are present and the relative concentrations of all the species involved in acid-base and conformational equilibria are successfully estimated from Multivariate Curve Resolution analysis of UV absorbance spectra recorded along acid-base titrations and melting experiments of single stranded, hairpin and their mixtures. The dependence of formation constants upon pH was successfully estimated. The hairpin h26 (5′-GAAGGAGGAGA-TTTT-TCTCCTCCTTC-3′), and the single stranded oligonucleotides s11CT (5′-CTTCCTCCTCT-3′), s11AG (5′-AGAGGAGGAAG-3′) and s11TG (5′-TGTGGTGGTTG-3′) were synthesized and their protonation and conformational equilibria were studied in detail. The procedure was shown to be especially useful for the study of triplexes with a low hypochromism upon formation.
Publisher version (URL)http://www.tandfonline.com/doi/pdf/10.1080/07391102.2003.10506922
URIhttp://hdl.handle.net/10261/124807
E-ISSN07391102
Appears in Collections:(CID) Artículos
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