Genetic profiling of protein burden and nuclear export overload
- University of Toronto, Canada
- Okayama University, Japan
- Meiji University, Japan
- University of Tokyo, Japan
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.
Data availability
All data generated or analysed during this study are included in the manuscript and supporting files.
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Author details
Funding
Japan Society for the Promotion of Science (17H03618)
- Hisao Moriya
Japan Society for the Promotion of Science (15KK0258)
- Hisao Moriya
Japan Society for the Promotion of Science (18K19300)
- Hisao Moriya
Japan Society for the Promotion of Science (20H03242)
- Hisao Moriya
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Copyright
© 2020, Kintaka et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Genetic profiling of protein burden and nuclear export overload
eLife 9:e54080.
https://doi.org/10.7554/eLife.54080
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