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首页> 外文期刊>International Journal of Molecular Sciences >The Role of Metallothionein in Oxidative Stress
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The Role of Metallothionein in Oxidative Stress

机译:金属硫蛋白在氧化应激中的作用

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Free radicals are chemical particles containing one or more unpaired electrons, which may be part of the molecule. They cause the molecule to become highly reactive. The free radicals are also known to play a dual role in biological systems, as they can be either beneficial or harmful for living systems. It is clear that there are numerous mechanisms participating on the protection of a cell against free radicals. In this review, our attention is paid to metallothioneins (MTs) as small, cysteine-rich and heavy metal-binding proteins, which participate in an array of protective stress responses. The mechanism of the reaction of metallothioneins with oxidants and electrophilic compounds is discussed. Numerous reports indicate that MT protects cells from exposure to oxidants and electrophiles, which react readily with sulfhydryl groups. Moreover, MT plays a key role in regulation of zinc levels and distribution in the intracellular space. The connections between zinc, MT and cancer are highlighted.
机译:自由基是含有一个或多个不成对电子的化学粒子,该电子可能是分子的一部分。它们使分子变得高度反应性。自由基在生物系统中也起着双重作用,因为它们可以对生物系统有益或有害。显然,有许多机制参与保护细胞免受自由基侵害。在这篇综述中,我们关注金属硫蛋白(MTs),它们是小的,富含半胱氨酸的重金属结合蛋白,它们参与一系列保护性应激反应。讨论了金属硫蛋白与氧化剂和亲电子化合物反应的机理。大量报告表明,MT保护细胞免受氧化剂和亲电试剂的影响,氧化剂和亲电试剂容易与巯基反应。此外,MT在调节锌水平和细胞内空间分布中起关键作用。锌,MT和癌症之间的联系得到了强调。

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