Abstract
Overproduction (op) of proteins triggers cellular defects. One of the consequences of overproduction is the protein burden/cost, which is produced by an overloading of the protein synthesis process. However, the physiology of cells under a protein burden is not well characterized. We performed genetic profiling of protein burden by systematic analysis of genetic interactions between GFP-op, surveying both deletion and temperature-sensitive mutants in budding yeast. We also performed genetic profiling in cells with overproduction of triple-GFP (tGFP), and the nuclear export signal-containing tGFP (NES-tGFP). The mutants specifically interacted with GFP-op were suggestive of unexpected connections between actin-related processes like polarization and the protein burden, which was supported by morphological analysis. The tGFP-op interactions suggested that this protein probe overloads the proteasome, whereas those that interacted with NES-tGFP involved genes encoding components of the nuclear export process, providing a resource for further analysis of the protein burden and nuclear export overload.
Original language | English |
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Article number | e54080 |
Pages (from-to) | 1-22 |
Number of pages | 22 |
Journal | eLife |
Volume | 9 |
DOIs | |
Publication status | Published - Oct 2020 |
ASJC Scopus subject areas
- Neuroscience(all)
- Immunology and Microbiology(all)
- Biochemistry, Genetics and Molecular Biology(all)