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http://dx.doi.org/10.5012/bkcs.2005.26.6.921

Metallothionein Induces Site-specific Cleavages in tRNAPhe  

Seon, Jung-Yun (Departments of Chemistry, Chosun University)
Koh, Moon-Joo (Departments of Chemistry, Chosun University)
Publication Information
Bulletin of the Korean Chemical Society / v.26, no.6, 2005 , pp. 921-924 More about this Journal
Abstract
It is known that metallothionein (MT) plays a role in the scavenging of free radicals, which is produced under various stress conditions. MT may function as an antioxidant that protects against oxidative damage of DNA, protein, and lipid induced by superoxide anion, hydrogen peroxide, hydroxyl radical, nitric oxide, and peroxynitrite. This study was undertaken to test the hypothesis that MT also protects from RNA damage induced by peroxynitrite, an important reactive nitrogen species that causes a diversity of pathological processes. A cell-free system was used. RNA damage was detected by the mobility of $tRNA^{Phe}$ in electrophoresis. Cleavages on tRNA were not induced by 3-morpholinosydnomine, which produces peroxynitrite directly. MT induced tRNA damage which was site specific.
Keywords
Metallothionein; MT; RNS; Peroxynitrite; tRNA$^{Phe}$;
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