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Unique structural features of interconverting monomeric and dimeric G-quadruplexes adopted by a sequence from the intron of the N-myc geneTrajkovski, Marko, 1984- ; Webba da Silva, Mateus ; Plavec, JanezA multidimensional heteronuclear NMR study has demonstrated that a guanine-rich DNA oligonucleotide originating from the N-myc gene folds into G-quadruplex structures in the presence of K+, NH4+, and ... Na+ ions. A monomericG-quadruplex formed in K+ ion containing solution exhibits three G-quartets and flexible propeller-type loops. The 3D structure with three single nucleotide loops represents a missing element in structures of parallelG-quadruplexes. The structural features together with the high temperature stability are suggestive of the specific biological role of G-quadruplex formation within the intron of the N-myc gene. An increase in K+ ion and oligonucleotide concentrations resulted in transformation of the monomeric G-quadruplex into a dimeric form. The dimeric G-quadruplex exhibits six stacked G-quartets, parallel strand orientations, and propeller-type loops. A link between the third and the fourth G-quartets consists of two adenine residues that are flipped out to facilitate consecutive stacking of six G-quartetsSource: Journal of the American Chemical Society : JACS. - ISSN 0002-7863 (Vol. 134, iss. 9, 2012, str. 4132-4141)Type of material - article, component partPublish date - 2012Language - englishCOBISS.SI-ID - 4920602
Author
Trajkovski, Marko, 1984- |
Webba da Silva, Mateus |
Plavec, Janez
Topics
G-quadruplexes |
N-myc gene |
NMR
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source: Journal of the American Chemical Society : JACS. - ISSN 0002-7863 (Vol. 134, iss. 9, 2012, str. 4132-4141)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Trajkovski, Marko, 1984- | 30845 |
Webba da Silva, Mateus | ![]() |
Plavec, Janez | 10082 |
Source: Personal bibliographies
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