Research output: Contribution to journal › Article › peer-review
Spectroscopic investigations of the structure of DNA complexes with Mn 2+ in UV and IR regions. / Polyanichko, A. M.; Chikhirzhina, E. V.; Andrushchenko, V. V.; Wieser, H.; Vorob'ev, V. I.
In: Biophysics, Vol. 50, No. 5, 2005, p. 710-715.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Spectroscopic investigations of the structure of DNA complexes with Mn 2+ in UV and IR regions
AU - Polyanichko, A. M.
AU - Chikhirzhina, E. V.
AU - Andrushchenko, V. V.
AU - Wieser, H.
AU - Vorob'ev, V. I.
PY - 2005
Y1 - 2005
N2 - Interactions between manganese ions and the DNA molecules were studied by means of UV and IR spectroscopy, as well as electronic and vibrational circular dichroism. It was shown that the process of manganese ion binding can be subdivided into three stages depending on the content of manganese ions. At the first stage, when the content of manganese ions is low, the interaction of the metal ions with DNA phosphates occurs, causing partial screening of their negative charge and stabilization of the double helix. This stage ends when the manganese-to-phosphate ratio reaches 1 ([Mn]/[P] < 1). At the second stage, at 1 < [Mn]/[P] < 6, synchronous binding to phosphate groups and nitrogen bases of DNA is observed. At this stage, one manganese ion can be simultaneously coordinated to the oxygen of the phosphate group and to the neighboring nitrogen base of DNA. At a higher [Mn]/[P] ratio, the destabilization of the double-helix begins and partial breakage of the hydrogen bonds in the base pairs occurs.
AB - Interactions between manganese ions and the DNA molecules were studied by means of UV and IR spectroscopy, as well as electronic and vibrational circular dichroism. It was shown that the process of manganese ion binding can be subdivided into three stages depending on the content of manganese ions. At the first stage, when the content of manganese ions is low, the interaction of the metal ions with DNA phosphates occurs, causing partial screening of their negative charge and stabilization of the double helix. This stage ends when the manganese-to-phosphate ratio reaches 1 ([Mn]/[P] < 1). At the second stage, at 1 < [Mn]/[P] < 6, synchronous binding to phosphate groups and nitrogen bases of DNA is observed. At this stage, one manganese ion can be simultaneously coordinated to the oxygen of the phosphate group and to the neighboring nitrogen base of DNA. At a higher [Mn]/[P] ratio, the destabilization of the double-helix begins and partial breakage of the hydrogen bonds in the base pairs occurs.
KW - Circular dichroism
KW - DNA
KW - Manganese ions
KW - UV/IR spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=33750344040&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:33750344040
VL - 50
SP - 710
EP - 715
JO - Biophysics (Russian Federation)
JF - Biophysics (Russian Federation)
SN - 0006-3509
IS - 5
ER -
ID: 88206021