Article
Human interferon-gamma mRNA autoregulates its translation through a pseudoknot that activates the interferon-inducible protein kinase PKR.
Cell - 25 Jan 2002
Ben-Asouli Yitzhak, Banai Yona, Pel-Or Yehuda, Shir Alexei, Kaempfer Raymond
Abstract excerpt
PKR, an interferon (IFN)-inducible protein kinase activated by double-stranded RNA, inhibits translation by phosphorylating the initiation factor eIF2alpha chain. We show that human IFN-gamma mRNA uses local activation of PKR in the cell to control its own translation yield. IFN-gamma mRNA activates PKR through a pseudoknot in its 5' untranslated region. Mutations that impair pseudoknot stability reduce the...
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