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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F11%3A10108119%21RIV12-GA0-11320___
rdf:type
n8:Vysledek skos:Concept
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0022286010009786
dcterms:description
The effect of magnesium ions on the conformational changes in the temperature region below the melting transition (premelting transitions) of a DNA duplex and an RNA hairpin was studied by difference Raman spectroscopy. The chosen model systems were the polynucleotide poly(dA)-poly(dT) duplex and the apical hairpin of the trans-activation response (TAR) element of HIV-1. Magnesium effect was displayed by differences of Raman spectra measured at various temperatures with and without magnesium ions. Our results have revealed that magnesium ions influence measurably the premelting transitions in both cases; the extent of the effect and its character is though quite different. In the case of the B'- B premelting transition of the polynucleotide poly(dA)-poly(dT) duplex, magnesium binds to the minor groove of the B but not of the B0 form and acts again the rearrangement in the vicinity of the thymidine keto-groups. On the other hand, the magnesium effect on the TAR hairpin premelting consists in a weak support of the premelting structural change via more effective electrostatic shielding. The effect of magnesium ions on the conformational changes in the temperature region below the melting transition (premelting transitions) of a DNA duplex and an RNA hairpin was studied by difference Raman spectroscopy. The chosen model systems were the polynucleotide poly(dA)-poly(dT) duplex and the apical hairpin of the trans-activation response (TAR) element of HIV-1. Magnesium effect was displayed by differences of Raman spectra measured at various temperatures with and without magnesium ions. Our results have revealed that magnesium ions influence measurably the premelting transitions in both cases; the extent of the effect and its character is though quite different. In the case of the B'- B premelting transition of the polynucleotide poly(dA)-poly(dT) duplex, magnesium binds to the minor groove of the B but not of the B0 form and acts again the rearrangement in the vicinity of the thymidine keto-groups. On the other hand, the magnesium effect on the TAR hairpin premelting consists in a weak support of the premelting structural change via more effective electrostatic shielding.
dcterms:title
Magnesium effect on premelting transitions in nucleic acids: DNA duplex and RNA hairpin models Magnesium effect on premelting transitions in nucleic acids: DNA duplex and RNA hairpin models
skos:prefLabel
Magnesium effect on premelting transitions in nucleic acids: DNA duplex and RNA hairpin models Magnesium effect on premelting transitions in nucleic acids: DNA duplex and RNA hairpin models
skos:notation
RIV/00216208:11320/11:10108119!RIV12-GA0-11320___
n8:predkladatel
n15:orjk%3A11320
n3:aktivita
n17:Z n17:S n17:P
n3:aktivity
P(GA202/09/0193), P(GD202/09/H041), S, Z(MSM0021620835)
n3:cisloPeriodika
1-3
n3:dodaniDat
n9:2012
n3:domaciTvurceVysledku
n12:6249701 n12:6712924 n12:5110874
n3:druhVysledku
n21:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
210198
n3:idVysledku
RIV/00216208:11320/11:10108119
n3:jazykVysledku
n6:eng
n3:klicovaSlova
Magnesium ions; Poly(dA)-poly(dT); TAR; RNA hairpin; DNA duplex; Raman spectroscopy
n3:klicoveSlovo
n5:DNA%20duplex n5:Raman%20spectroscopy n5:Magnesium%20ions n5:TAR n5:Poly%28dA%29-poly%28dT%29 n5:RNA%20hairpin
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[CE3478F540C5]
n3:nazevZdroje
Journal of Molecular Structure
n3:obor
n22:BO
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n11:GD202%2F09%2FH041 n11:GA202%2F09%2F0193
n3:rokUplatneniVysledku
n9:2011
n3:svazekPeriodika
993
n3:tvurceVysledku
Espinoza Herrera, Shirly Josefina Štěpánek, Josef Ottová, Pavla
n3:wos
000291066000052
n3:zamer
n18:MSM0021620835
s:issn
0022-2860
s:numberOfPages
4
n7:doi
10.1016/j.molstruc.2010.12.025
n13:organizacniJednotka
11320