Iga Piekarska

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The uncharacterized Saccharomyces cerevisiae proteins Fcf1 and Fcf2, encoded by the ORFs YDR339c and YLR051c, respectively, were identified in a tandem affinity purification experiment of the known 40S factor Faf1p. Most of the proteins associated with TAP-Faf1p are trans-acting factors involved in pre-rRNA processing and 40S subunit biogenesis, in(More)
Sporulation of the budding yeast Saccharomyces cerevisiae — equivalent to gametogenesis in higher organisms, is a complex differentiation program induced by starvation of cells for nitrogen and carbon. Such environmental conditions activate coordinated, sequential changes in gene expression leading to production of haploid, stress-resistant spores.(More)
The yeast protein Ccz1p is necessary for vacuolar protein trafficking and biogenesis. In a complex with Mon1p, it mediates fusion of transport intermediates with the vacuole membrane by activating the small GTPase Ypt7p. Additionally, genetic data suggest a role of Ccz1p in earlier transport steps, in the Golgi. In a search for further proteins interacting(More)
The CCZ1 gene is a member of the class B VPS (vacuolar protein sorting) genes and it is engaged in the last stage of delivery of multiple kinds of cargo to the yeast vacuole. In the process of fusion of the multivesicular body (MVB) with the vacuole, Ccz1p forms a complex with Ypt7p. Both genes are non-essential for vegetative growth, but their deletions(More)
The proteins Ccz1 and Mon1 are known to function together with the Rab-GTPase Ypt7 in membrane fusion reactions at the yeast vacuole. In a genome-wide analysis they have also been found to interact genetically with the nuclear-migration protein Num1. In this study we analyze these synthetic effects and we show that the mutants ccz1Delta num1Delta, mon1Delta(More)
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