3'-Untranslated regions of oxidative phosphorylation mRNAs function in vivo, as enhancers of translation

Carlo Maria Di Liegro, Marianna Bellafiore, Rantanen, Rantanen, Carlo Maria Di Liegro, Marianna Bellafiore, Cuezva, Izquierdo

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Abstract

Recent findings have indicated that the 3'-untranslated region (3'-UTR) of the mRNA encoding the β-catalytic subunit of the mitochondrial H+-ATP synthase has an in vitro translationenhancing activity (TEA) [Izquierdo and Cuezva, Mol. Cell. Biol. (1997) 17, 5255-5268; Izquierdo and Cuezva, Biochem. J. (2000) 346, 849-855]. In the present work, we have expressed chimaeric plasmids that encode mRNA variants of green fluorescent protein in normal rat kidney and liver clone 9 cells to determine whether the 3'-UTRs of nuclear-encoded mRNAs involved in the biogenesis of mitochondria have an intrinsic TEA. TEA is found in the 3'-UTR of the mRNAs encoding the α- and β-subunits of the rat H+-ATP synthase complex, as well as in subunit IV of cytochrome c oxidase. No TEA is present in the 3'-UTR of the somatic mRNA encoding rat mitochondrial transcription factor A. Interestingly, the TEA of the 3'-UTR of mRNAs of oxidative phosphorylation is different, depending upon the cell type analysed. These data provide the first in vivo evidence of a novel cell-specific mechanism for the control of the translation of mRNAs required in mitochondrial function.
Lingua originaleEnglish
pagine (da-a)109-115
Numero di pagine7
RivistaBiochemical Journal
Volume352
Stato di pubblicazionePublished - 2000

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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