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- W1978694089 abstract "The COP 9 signalosome ( CSN ) is a highly conserved eukaryotic protein complex which regulates the cullin RING family of ubiquitin ligases and carries out a deneddylase activity that resides in subunit 5 ( CSN 5). Whereas CSN activity is essential for the development of higher eukaryotes, several unicellular fungi including the budding yeast Saccharomyces cerevisiae can survive without a functional CSN . Nevertheless, the budding yeast CSN is biochemically active and deletion mutants of each of its subunits exhibit deficiency in cullins deneddylation, although the biological context of this activity is still unknown in this organism. To further characterize CSN function in budding yeast, we present here a transcriptomic and proteomic analysis of a S. cerevisiae strain deleted in the CSN 5/ RRI 1 gene (hereafter referred to as CSN 5 ), coding for the only canonical subunit of the complex. We show that Csn5 is involved in modulation of the genes controlling amino acid and lipid metabolism and especially ergosterol biosynthesis. These alterations in gene expression correlate with the lower ergosterol levels and increased intracellular zinc content which we observed in csn5 null mutant cells. We show that some of these regulatory effects of Csn5, in particular the control of isoprenoid biosynthesis, are conserved through evolution, since similar transcriptomic and/or proteomic effects of csn5 mutation were previously observed in other eukaryotic organisms such as Aspergillus nidulans , Arabidopsis thaliana and Drosophila melanogaster . Our results suggest that the diverged budding yeast CSN is more conserved than was previously thought." @default.
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- W1978694089 date "2013-11-25" @default.
- W1978694089 modified "2023-10-03" @default.
- W1978694089 title "The COP9 signalosome is involved in the regulation of lipid metabolism and of transition metals uptake in<i>Saccharomyces cerevisiae</i>" @default.
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- W1978694089 doi "https://doi.org/10.1111/febs.12584" @default.
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