镁离子与铁酮的半醌自由基(一种活性氧指示剂)的相互作用

IF 4.033 Q4 Biochemistry, Genetics and Molecular Biology Biophysics Pub Date : 2024-03-18 DOI:10.1134/S0006350923060192
L. Yu. Ustynyuk, V. A. Medvedeva, S. O. Liubimovskii, E. K. Ruuge, A. N. Tikhonov
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引用次数: 0

摘要

摘要 利用实验(电子顺磁共振)和量子化学(密度泛函理论)研究方法表明,以前观察到的海水中半醌铁龙自由基电子顺磁共振谱的变化是由于它与 Mg2+ 离子的相互作用引起的。Mg2+ 与铁氧自由基之间形成复合物,一方面是由于携带相反符号(+2 和 -3)大电荷的离子之间的静电吸引,另一方面是由于 Mg2+ 离子能够有效地与双齿含氧配体结合。紧密接触离子对的形成导致铁龙自由基中电子和自旋密度的重新分布,这可以从观察到的该自由基电子顺磁共振谱的变化中判断出来。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Interaction of Magnesium Ions with Semiquinone Radicals of Tiron, an Indicator of Reactive Oxygen Species

It has been shown using experimental (electron paramagnetic resonance) and quantum chemical (density functional theory) research methods that the previously observed changes in the electron paramagnetic resonance spectrum of the semiquinone Tiron radical in seawater are due to its interaction with Mg2+ ions. The formation of a complex between Mg2+ and the Tiron radical is due to the electrostatic attraction of ions carrying large charges of the opposite sign (+2 and –3), on the one hand, and the ability of Mg2+ ions to bind effectively to bidentate oxygen-containing ligands, on the other hand. The formation of tight contact ion pairs leads to a redistribution of the electron and spin density in the Tiron radical, which can be judged by the observed changes in the electron paramagnetic resonance spectrum of this radical.

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来源期刊
Biophysics
Biophysics Biochemistry, Genetics and Molecular Biology-Biophysics
CiteScore
1.20
自引率
0.00%
发文量
67
期刊介绍: Biophysics is a multidisciplinary international peer reviewed journal that covers a wide scope of problems related to the main physical mechanisms of processes taking place at different organization levels in biosystems. It includes structure and dynamics of macromolecules, cells and tissues; the influence of environment; energy transformation and transfer; thermodynamics; biological motility; population dynamics and cell differentiation modeling; biomechanics and tissue rheology; nonlinear phenomena, mathematical and cybernetics modeling of complex systems; and computational biology. The journal publishes short communications devoted and review articles.
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