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@article{1707637,
author = {Gargallo, Raimundo and Aviñó, Anna and Eritja, Ramon and Jarošová, Petra and Mazzini, Stefania and Scaglioni, Leonardo and Táborský, Petr},
article_location = {Oxford},
article_number = {March 2021},
doi = {http://dx.doi.org/10.1016/j.saa.2020.119185},
keywords = {Berberine; I-motif; DNA binders; G-quadruplex},
language = {eng},
issn = {1386-1425},
journal = {Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy},
title = {Study of alkaloid berberine and its interaction with the human telomeric i-motif DNA structure},
url = {https://www.sciencedirect.com/science/article/abs/pii/S1386142520311641},
volume = {248},
year = {2021}
}
TY - JOUR
ID - 1707637
AU - Gargallo, Raimundo - Aviñó, Anna - Eritja, Ramon - Jarošová, Petra - Mazzini, Stefania - Scaglioni, Leonardo - Táborský, Petr
PY - 2021
TI - Study of alkaloid berberine and its interaction with the human telomeric i-motif DNA structure
JF - Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
VL - 248
IS - March 2021
SP - 1-12
EP - 1-12
PB - Elsevier
SN - 13861425
KW - Berberine
KW - I-motif
KW - DNA binders
KW - G-quadruplex
UR - https://www.sciencedirect.com/science/article/abs/pii/S1386142520311641
L2 - https://www.sciencedirect.com/science/article/abs/pii/S1386142520311641
N2 - The alkaloid berberine presents many biological activities related to its potential to bind DNA structures, such as duplex or G-quadruplex. Recently, it has been proposed that berberine may interact with i-motif structures formed from the folding of cytosine-rich sequences. In the present work, the interaction of this alkaloid with the i-motif formed by the human telomere cytosine-rich sequence, as well as with several positive and negative controls, has been studied. Molecular fluorescence and circular dichroism spectroscopies, as well as nuclear magnetic resonance spectrometry and competitive dialysis, have been used with this purpose. The results shown here reveal that the interaction of berberine with this i-motif is weak, mostly electrostatics in nature and takes place with bases not involved in C·C+ base pairs. Moreover, this ligand is not selective for i-motif structures, as binds equally to both, folded structure, and unfolded strand, without producing any stabilization of the i-motif. As a conclusion, the development of analytical methods based on the interaction of fluorescent ligands, such as berberine, with i-motif structures should consider the thermodynamic aspects related with the interaction, as well as the selectivity of the proposed ligands with different DNA structures, including unfolded strands.
ER -
GARGALLO, Raimundo, Anna AVIÑÓ, Ramon ERITJA, Petra JAROŠOVÁ, Stefania MAZZINI, Leonardo SCAGLIONI a Petr TÁBORSKÝ. Study of alkaloid berberine and its interaction with the human telomeric i-motif DNA structure. \textit{Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy}. Oxford: Elsevier, 2021, roč.~248, March 2021, s.~1-12. ISSN~1386-1425. Dostupné z: https://dx.doi.org/10.1016/j.saa.2020.119185.
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