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

eLife 2020 Nov 04

filter terms:

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. © 2020, Kintaka et al.

Citation

Reiko Kintaka, Koji Makanae, Shotaro Namba, Hisaaki Kato, Keiji Kito, Shinsuke Ohnuki, Yoshikazu Ohya, Brenda J Andrews, Charles Boone, Hisao Moriya. Genetic profiling of protein burden and nuclear export overload. eLife. 2020 Nov 04;9