Reference: Ellis TP, et al. (2004) Aep3p stabilizes the mitochondrial bicistronic mRNA encoding subunits 6 and 8 of the H+-translocating ATP synthase of Saccharomyces cerevisiae. J Biol Chem 279(16):15728-33

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Abstract

Subunits 6 and 8 of the mitochondrial ATPase in Saccharomyces cerevisiae are encoded by the mitochondrial genome and translated from bicistronic mRNAs containing both reading frames. The stability of the two major species of ATP8/6 mRNA, which differ in the length of the 5'-untranslated region, depends on the expression of several nuclear-encoded factors. In the present study, the product of the gene designated AEP3 (open reading frame YPL005W) is shown to be required for stabilization and/or processing of both ATP8/6 mRNA species. In an aep3-disruptant strain, the shorter ATP8/6 mRNA was undetectable, and the level of the longer mRNA was reduced to approximately 35% that of wild type. Localization of a hemagglutinin-tagged version of Aep3p showed that the protein is an extrinsic constituent of the mitochondrial inner membrane facing the matrix.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S.
Authors
Ellis TP, Helfenbein KG, Tzagoloff A, Dieckmann CL
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