Genetic profiling of protein burden and nuclear export overload

Reiko Kintaka, Koji Makanae, Shotaro Namba, Hisaaki Kato, Keiji Kito, Shinsuke Ohnuki, Yoshikazu Ohya, Brenda J. Andrews, Charles Boone, Hisao Moriya

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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 languageEnglish
Article numbere54080
Pages (from-to)1-22
Number of pages22
Publication statusPublished - Oct 2020

ASJC Scopus subject areas

  • Neuroscience(all)
  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)


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